{
  "version": 3,
  "sources": ["../../src/common/input/TextDecoder.ts", "../../src/common/buffer/Constants.ts", "../../src/common/buffer/AttributeData.ts", "../../src/common/buffer/CellData.ts", "../../src/common/public/BufferLineApiView.ts", "../../src/common/public/BufferApiView.ts", "../../src/vs/base/common/errors.ts", "../../src/vs/base/common/arraysFind.ts", "../../src/vs/base/common/arrays.ts", "../../src/vs/base/common/collections.ts", "../../src/vs/base/common/map.ts", "../../src/vs/base/common/functional.ts", "../../src/vs/base/common/iterator.ts", "../../src/vs/base/common/lifecycle.ts", "../../src/vs/base/common/linkedList.ts", "../../src/vs/base/common/stopwatch.ts", "../../src/vs/base/common/event.ts", "../../src/common/public/BufferNamespaceApi.ts", "../../src/common/public/ParserApi.ts", "../../src/common/public/UnicodeApi.ts", "../../src/common/buffer/BufferLine.ts", "../../src/common/services/ServiceRegistry.ts", "../../src/common/services/Services.ts", "../../src/common/services/InstantiationService.ts", "../../src/common/services/LogService.ts", "../../src/common/CircularList.ts", "../../src/common/Platform.ts", "../../src/common/TaskQueue.ts", "../../src/common/buffer/BufferReflow.ts", "../../src/common/buffer/Marker.ts", "../../src/common/data/Charsets.ts", "../../src/common/buffer/Buffer.ts", "../../src/common/buffer/BufferSet.ts", "../../src/common/services/BufferService.ts", "../../src/common/services/OptionsService.ts", "../../src/common/Clone.ts", "../../src/common/services/CoreService.ts", "../../src/common/services/CoreMouseService.ts", "../../src/common/input/UnicodeV6.ts", "../../src/common/services/UnicodeService.ts", "../../src/common/services/CharsetService.ts", "../../src/common/WindowsMode.ts", "../../src/common/data/EscapeSequences.ts", "../../src/common/parser/Params.ts", "../../src/common/parser/OscParser.ts", "../../src/common/parser/DcsParser.ts", "../../src/common/parser/EscapeSequenceParser.ts", "../../src/common/input/XParseColor.ts", "../../src/common/InputHandler.ts", "../../src/common/input/WriteBuffer.ts", "../../src/common/services/OscLinkService.ts", "../../src/common/CoreTerminal.ts", "../../src/headless/Terminal.ts", "../../src/common/public/AddonManager.ts", "../../src/headless/public/Terminal.ts"],
  "sourcesContent": ["/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\n/**\n * Polyfill - Convert UTF32 codepoint into JS string.\n * Note: The built-in String.fromCodePoint happens to be much slower\n *       due to additional sanity checks. We can avoid them since\n *       we always operate on legal UTF32 (granted by the input decoders)\n *       and use this faster version instead.\n */\nexport function stringFromCodePoint(codePoint: number): string {\n  if (codePoint > 0xFFFF) {\n    codePoint -= 0x10000;\n    return String.fromCharCode((codePoint >> 10) + 0xD800) + String.fromCharCode((codePoint % 0x400) + 0xDC00);\n  }\n  return String.fromCharCode(codePoint);\n}\n\n/**\n * Convert UTF32 char codes into JS string.\n * Basically the same as `stringFromCodePoint` but for multiple codepoints\n * in a loop (which is a lot faster).\n */\nexport function utf32ToString(data: Uint32Array, start: number = 0, end: number = data.length): string {\n  let result = '';\n  for (let i = start; i < end; ++i) {\n    let codepoint = data[i];\n    if (codepoint > 0xFFFF) {\n      // JS strings are encoded as UTF16, thus a non BMP codepoint gets converted into a surrogate\n      // pair conversion rules:\n      //  - subtract 0x10000 from code point, leaving a 20 bit number\n      //  - add high 10 bits to 0xD800  --> first surrogate\n      //  - add low 10 bits to 0xDC00   --> second surrogate\n      codepoint -= 0x10000;\n      result += String.fromCharCode((codepoint >> 10) + 0xD800) + String.fromCharCode((codepoint % 0x400) + 0xDC00);\n    } else {\n      result += String.fromCharCode(codepoint);\n    }\n  }\n  return result;\n}\n\n/**\n * StringToUtf32 - decodes UTF16 sequences into UTF32 codepoints.\n * To keep the decoder in line with JS strings it handles single surrogates as UCS2.\n */\nexport class StringToUtf32 {\n  private _interim: number = 0;\n\n  /**\n   * Clears interim and resets decoder to clean state.\n   */\n  public clear(): void {\n    this._interim = 0;\n  }\n\n  /**\n   * Decode JS string to UTF32 codepoints.\n   * The methods assumes stream input and will store partly transmitted\n   * surrogate pairs and decode them with the next data chunk.\n   * Note: The method does no bound checks for target, therefore make sure\n   * the provided input data does not exceed the size of `target`.\n   * Returns the number of written codepoints in `target`.\n   */\n  public decode(input: string, target: Uint32Array): number {\n    const length = input.length;\n\n    if (!length) {\n      return 0;\n    }\n\n    let size = 0;\n    let startPos = 0;\n\n    // handle leftover surrogate high\n    if (this._interim) {\n      const second = input.charCodeAt(startPos++);\n      if (0xDC00 <= second && second <= 0xDFFF) {\n        target[size++] = (this._interim - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;\n      } else {\n        // illegal codepoint (USC2 handling)\n        target[size++] = this._interim;\n        target[size++] = second;\n      }\n      this._interim = 0;\n    }\n\n    for (let i = startPos; i < length; ++i) {\n      const code = input.charCodeAt(i);\n      // surrogate pair first\n      if (0xD800 <= code && code <= 0xDBFF) {\n        if (++i >= length) {\n          this._interim = code;\n          return size;\n        }\n        const second = input.charCodeAt(i);\n        if (0xDC00 <= second && second <= 0xDFFF) {\n          target[size++] = (code - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;\n        } else {\n          // illegal codepoint (USC2 handling)\n          target[size++] = code;\n          target[size++] = second;\n        }\n        continue;\n      }\n      if (code === 0xFEFF) {\n        // BOM\n        continue;\n      }\n      target[size++] = code;\n    }\n    return size;\n  }\n}\n\n/**\n * Utf8Decoder - decodes UTF8 byte sequences into UTF32 codepoints.\n */\nexport class Utf8ToUtf32 {\n  public interim: Uint8Array = new Uint8Array(3);\n\n  /**\n   * Clears interim bytes and resets decoder to clean state.\n   */\n  public clear(): void {\n    this.interim.fill(0);\n  }\n\n  /**\n   * Decodes UTF8 byte sequences in `input` to UTF32 codepoints in `target`.\n   * The methods assumes stream input and will store partly transmitted bytes\n   * and decode them with the next data chunk.\n   * Note: The method does no bound checks for target, therefore make sure\n   * the provided data chunk does not exceed the size of `target`.\n   * Returns the number of written codepoints in `target`.\n   */\n  public decode(input: Uint8Array, target: Uint32Array): number {\n    const length = input.length;\n\n    if (!length) {\n      return 0;\n    }\n\n    let size = 0;\n    let byte1: number;\n    let byte2: number;\n    let byte3: number;\n    let byte4: number;\n    let codepoint = 0;\n    let startPos = 0;\n\n    // handle leftover bytes\n    if (this.interim[0]) {\n      let discardInterim = false;\n      let cp = this.interim[0];\n      cp &= ((((cp & 0xE0) === 0xC0)) ? 0x1F : (((cp & 0xF0) === 0xE0)) ? 0x0F : 0x07);\n      let pos = 0;\n      let tmp: number;\n      while ((tmp = this.interim[++pos] & 0x3F) && pos < 4) {\n        cp <<= 6;\n        cp |= tmp;\n      }\n      // missing bytes - read ahead from input\n      const type = (((this.interim[0] & 0xE0) === 0xC0)) ? 2 : (((this.interim[0] & 0xF0) === 0xE0)) ? 3 : 4;\n      const missing = type - pos;\n      while (startPos < missing) {\n        if (startPos >= length) {\n          return 0;\n        }\n        tmp = input[startPos++];\n        if ((tmp & 0xC0) !== 0x80) {\n          // wrong continuation, discard interim bytes completely\n          startPos--;\n          discardInterim = true;\n          break;\n        } else {\n          // need to save so we can continue short inputs in next call\n          this.interim[pos++] = tmp;\n          cp <<= 6;\n          cp |= tmp & 0x3F;\n        }\n      }\n      if (!discardInterim) {\n        // final test is type dependent\n        if (type === 2) {\n          if (cp < 0x80) {\n            // wrong starter byte\n            startPos--;\n          } else {\n            target[size++] = cp;\n          }\n        } else if (type === 3) {\n          if (cp < 0x0800 || (cp >= 0xD800 && cp <= 0xDFFF) || cp === 0xFEFF) {\n            // illegal codepoint or BOM\n          } else {\n            target[size++] = cp;\n          }\n        } else {\n          if (cp < 0x010000 || cp > 0x10FFFF) {\n            // illegal codepoint\n          } else {\n            target[size++] = cp;\n          }\n        }\n      }\n      this.interim.fill(0);\n    }\n\n    // loop through input\n    const fourStop = length - 4;\n    let i = startPos;\n    while (i < length) {\n      /**\n       * ASCII shortcut with loop unrolled to 4 consecutive ASCII chars.\n       * This is a compromise between speed gain for ASCII\n       * and penalty for non ASCII:\n       * For best ASCII performance the char should be stored directly into target,\n       * but even a single attempt to write to target and compare afterwards\n       * penalizes non ASCII really bad (-50%), thus we load the char into byteX first,\n       * which reduces ASCII performance by ~15%.\n       * This trial for ASCII reduces non ASCII performance by ~10% which seems acceptible\n       * compared to the gains.\n       * Note that this optimization only takes place for 4 consecutive ASCII chars,\n       * for any shorter it bails out. Worst case - all 4 bytes being read but\n       * thrown away due to the last being a non ASCII char (-10% performance).\n       */\n      while (i < fourStop\n        && !((byte1 = input[i]) & 0x80)\n        && !((byte2 = input[i + 1]) & 0x80)\n        && !((byte3 = input[i + 2]) & 0x80)\n        && !((byte4 = input[i + 3]) & 0x80))\n      {\n        target[size++] = byte1;\n        target[size++] = byte2;\n        target[size++] = byte3;\n        target[size++] = byte4;\n        i += 4;\n      }\n\n      // reread byte1\n      byte1 = input[i++];\n\n      // 1 byte\n      if (byte1 < 0x80) {\n        target[size++] = byte1;\n\n        // 2 bytes\n      } else if ((byte1 & 0xE0) === 0xC0) {\n        if (i >= length) {\n          this.interim[0] = byte1;\n          return size;\n        }\n        byte2 = input[i++];\n        if ((byte2 & 0xC0) !== 0x80) {\n          // wrong continuation\n          i--;\n          continue;\n        }\n        codepoint = (byte1 & 0x1F) << 6 | (byte2 & 0x3F);\n        if (codepoint < 0x80) {\n          // wrong starter byte\n          i--;\n          continue;\n        }\n        target[size++] = codepoint;\n\n        // 3 bytes\n      } else if ((byte1 & 0xF0) === 0xE0) {\n        if (i >= length) {\n          this.interim[0] = byte1;\n          return size;\n        }\n        byte2 = input[i++];\n        if ((byte2 & 0xC0) !== 0x80) {\n          // wrong continuation\n          i--;\n          continue;\n        }\n        if (i >= length) {\n          this.interim[0] = byte1;\n          this.interim[1] = byte2;\n          return size;\n        }\n        byte3 = input[i++];\n        if ((byte3 & 0xC0) !== 0x80) {\n          // wrong continuation\n          i--;\n          continue;\n        }\n        codepoint = (byte1 & 0x0F) << 12 | (byte2 & 0x3F) << 6 | (byte3 & 0x3F);\n        if (codepoint < 0x0800 || (codepoint >= 0xD800 && codepoint <= 0xDFFF) || codepoint === 0xFEFF) {\n          // illegal codepoint or BOM, no i-- here\n          continue;\n        }\n        target[size++] = codepoint;\n\n        // 4 bytes\n      } else if ((byte1 & 0xF8) === 0xF0) {\n        if (i >= length) {\n          this.interim[0] = byte1;\n          return size;\n        }\n        byte2 = input[i++];\n        if ((byte2 & 0xC0) !== 0x80) {\n          // wrong continuation\n          i--;\n          continue;\n        }\n        if (i >= length) {\n          this.interim[0] = byte1;\n          this.interim[1] = byte2;\n          return size;\n        }\n        byte3 = input[i++];\n        if ((byte3 & 0xC0) !== 0x80) {\n          // wrong continuation\n          i--;\n          continue;\n        }\n        if (i >= length) {\n          this.interim[0] = byte1;\n          this.interim[1] = byte2;\n          this.interim[2] = byte3;\n          return size;\n        }\n        byte4 = input[i++];\n        if ((byte4 & 0xC0) !== 0x80) {\n          // wrong continuation\n          i--;\n          continue;\n        }\n        codepoint = (byte1 & 0x07) << 18 | (byte2 & 0x3F) << 12 | (byte3 & 0x3F) << 6 | (byte4 & 0x3F);\n        if (codepoint < 0x010000 || codepoint > 0x10FFFF) {\n          // illegal codepoint, no i-- here\n          continue;\n        }\n        target[size++] = codepoint;\n      } else {\n        // illegal byte, just skip\n      }\n    }\n    return size;\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nexport const DEFAULT_COLOR = 0;\nexport const DEFAULT_ATTR = (0 << 18) | (DEFAULT_COLOR << 9) | (256 << 0);\nexport const DEFAULT_EXT = 0;\n\nexport const CHAR_DATA_ATTR_INDEX = 0;\nexport const CHAR_DATA_CHAR_INDEX = 1;\nexport const CHAR_DATA_WIDTH_INDEX = 2;\nexport const CHAR_DATA_CODE_INDEX = 3;\n\n/**\n * Null cell - a real empty cell (containing nothing).\n * Note that code should always be 0 for a null cell as\n * several test condition of the buffer line rely on this.\n */\nexport const NULL_CELL_CHAR = '';\nexport const NULL_CELL_WIDTH = 1;\nexport const NULL_CELL_CODE = 0;\n\n/**\n * Whitespace cell.\n * This is meant as a replacement for empty cells when needed\n * during rendering lines to preserve correct aligment.\n */\nexport const WHITESPACE_CELL_CHAR = ' ';\nexport const WHITESPACE_CELL_WIDTH = 1;\nexport const WHITESPACE_CELL_CODE = 32;\n\n/**\n * Bitmasks for accessing data in `content`.\n */\nexport const enum Content {\n  /**\n   * bit 1..21    codepoint, max allowed in UTF32 is 0x10FFFF (21 bits taken)\n   *              read:   `codepoint = content & Content.codepointMask;`\n   *              write:  `content |= codepoint & Content.codepointMask;`\n   *                      shortcut if precondition `codepoint <= 0x10FFFF` is met:\n   *                      `content |= codepoint;`\n   */\n  CODEPOINT_MASK = 0x1FFFFF,\n\n  /**\n   * bit 22       flag indication whether a cell contains combined content\n   *              read:   `isCombined = content & Content.isCombined;`\n   *              set:    `content |= Content.isCombined;`\n   *              clear:  `content &= ~Content.isCombined;`\n   */\n  IS_COMBINED_MASK = 0x200000,  // 1 << 21\n\n  /**\n   * bit 1..22    mask to check whether a cell contains any string data\n   *              we need to check for codepoint and isCombined bits to see\n   *              whether a cell contains anything\n   *              read:   `isEmpty = !(content & Content.hasContent)`\n   */\n  HAS_CONTENT_MASK = 0x3FFFFF,\n\n  /**\n   * bit 23..24   wcwidth value of cell, takes 2 bits (ranges from 0..2)\n   *              read:   `width = (content & Content.widthMask) >> Content.widthShift;`\n   *                      `hasWidth = content & Content.widthMask;`\n   *                      as long as wcwidth is highest value in `content`:\n   *                      `width = content >> Content.widthShift;`\n   *              write:  `content |= (width << Content.widthShift) & Content.widthMask;`\n   *                      shortcut if precondition `0 <= width <= 3` is met:\n   *                      `content |= width << Content.widthShift;`\n   */\n  WIDTH_MASK = 0xC00000,   // 3 << 22\n  WIDTH_SHIFT = 22\n}\n\nexport const enum Attributes {\n  /**\n   * bit 1..8     blue in RGB, color in P256 and P16\n   */\n  BLUE_MASK = 0xFF,\n  BLUE_SHIFT = 0,\n  PCOLOR_MASK = 0xFF,\n  PCOLOR_SHIFT = 0,\n\n  /**\n   * bit 9..16    green in RGB\n   */\n  GREEN_MASK = 0xFF00,\n  GREEN_SHIFT = 8,\n\n  /**\n   * bit 17..24   red in RGB\n   */\n  RED_MASK = 0xFF0000,\n  RED_SHIFT = 16,\n\n  /**\n   * bit 25..26   color mode: DEFAULT (0) | P16 (1) | P256 (2) | RGB (3)\n   */\n  CM_MASK = 0x3000000,\n  CM_DEFAULT = 0,\n  CM_P16 = 0x1000000,\n  CM_P256 = 0x2000000,\n  CM_RGB = 0x3000000,\n\n  /**\n   * bit 1..24  RGB room\n   */\n  RGB_MASK = 0xFFFFFF\n}\n\nexport const enum FgFlags {\n  /**\n   * bit 27..32\n   */\n  INVERSE = 0x4000000,\n  BOLD = 0x8000000,\n  UNDERLINE = 0x10000000,\n  BLINK = 0x20000000,\n  INVISIBLE = 0x40000000,\n  STRIKETHROUGH = 0x80000000,\n}\n\nexport const enum BgFlags {\n  /**\n   * bit 27..32 (upper 2 unused)\n   */\n  ITALIC = 0x4000000,\n  DIM = 0x8000000,\n  HAS_EXTENDED = 0x10000000,\n  PROTECTED = 0x20000000,\n  OVERLINE = 0x40000000\n}\n\nexport const enum ExtFlags {\n  /**\n   * bit 27..29\n   */\n  UNDERLINE_STYLE = 0x1C000000,\n\n  /**\n   * bit 30..32\n   *\n   * An optional variant for the glyph, this can be used for example to offset underlines by a\n   * number of pixels to create a perfect pattern.\n   */\n  VARIANT_OFFSET = 0xE0000000\n}\n\nexport const enum UnderlineStyle {\n  NONE = 0,\n  SINGLE = 1,\n  DOUBLE = 2,\n  CURLY = 3,\n  DOTTED = 4,\n  DASHED = 5\n}\n", "/**\n * Copyright (c) 2018 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { IAttributeData, IColorRGB, IExtendedAttrs } from 'common/Types';\nimport { Attributes, FgFlags, BgFlags, UnderlineStyle, ExtFlags } from 'common/buffer/Constants';\n\nexport class AttributeData implements IAttributeData {\n  public static toColorRGB(value: number): IColorRGB {\n    return [\n      value >>> Attributes.RED_SHIFT & 255,\n      value >>> Attributes.GREEN_SHIFT & 255,\n      value & 255\n    ];\n  }\n\n  public static fromColorRGB(value: IColorRGB): number {\n    return (value[0] & 255) << Attributes.RED_SHIFT | (value[1] & 255) << Attributes.GREEN_SHIFT | value[2] & 255;\n  }\n\n  public clone(): IAttributeData {\n    const newObj = new AttributeData();\n    newObj.fg = this.fg;\n    newObj.bg = this.bg;\n    newObj.extended = this.extended.clone();\n    return newObj;\n  }\n\n  // data\n  public fg = 0;\n  public bg = 0;\n  public extended: IExtendedAttrs = new ExtendedAttrs();\n\n  // flags\n  public isInverse(): number       { return this.fg & FgFlags.INVERSE; }\n  public isBold(): number          { return this.fg & FgFlags.BOLD; }\n  public isUnderline(): number     {\n    if (this.hasExtendedAttrs() && this.extended.underlineStyle !== UnderlineStyle.NONE) {\n      return 1;\n    }\n    return this.fg & FgFlags.UNDERLINE;\n  }\n  public isBlink(): number         { return this.fg & FgFlags.BLINK; }\n  public isInvisible(): number     { return this.fg & FgFlags.INVISIBLE; }\n  public isItalic(): number        { return this.bg & BgFlags.ITALIC; }\n  public isDim(): number           { return this.bg & BgFlags.DIM; }\n  public isStrikethrough(): number { return this.fg & FgFlags.STRIKETHROUGH; }\n  public isProtected(): number     { return this.bg & BgFlags.PROTECTED; }\n  public isOverline(): number      { return this.bg & BgFlags.OVERLINE; }\n\n  // color modes\n  public getFgColorMode(): number { return this.fg & Attributes.CM_MASK; }\n  public getBgColorMode(): number { return this.bg & Attributes.CM_MASK; }\n  public isFgRGB(): boolean       { return (this.fg & Attributes.CM_MASK) === Attributes.CM_RGB; }\n  public isBgRGB(): boolean       { return (this.bg & Attributes.CM_MASK) === Attributes.CM_RGB; }\n  public isFgPalette(): boolean   { return (this.fg & Attributes.CM_MASK) === Attributes.CM_P16 || (this.fg & Attributes.CM_MASK) === Attributes.CM_P256; }\n  public isBgPalette(): boolean   { return (this.bg & Attributes.CM_MASK) === Attributes.CM_P16 || (this.bg & Attributes.CM_MASK) === Attributes.CM_P256; }\n  public isFgDefault(): boolean   { return (this.fg & Attributes.CM_MASK) === 0; }\n  public isBgDefault(): boolean   { return (this.bg & Attributes.CM_MASK) === 0; }\n  public isAttributeDefault(): boolean { return this.fg === 0 && this.bg === 0; }\n\n  // colors\n  public getFgColor(): number {\n    switch (this.fg & Attributes.CM_MASK) {\n      case Attributes.CM_P16:\n      case Attributes.CM_P256:  return this.fg & Attributes.PCOLOR_MASK;\n      case Attributes.CM_RGB:   return this.fg & Attributes.RGB_MASK;\n      default:                  return -1;  // CM_DEFAULT defaults to -1\n    }\n  }\n  public getBgColor(): number {\n    switch (this.bg & Attributes.CM_MASK) {\n      case Attributes.CM_P16:\n      case Attributes.CM_P256:  return this.bg & Attributes.PCOLOR_MASK;\n      case Attributes.CM_RGB:   return this.bg & Attributes.RGB_MASK;\n      default:                  return -1;  // CM_DEFAULT defaults to -1\n    }\n  }\n\n  // extended attrs\n  public hasExtendedAttrs(): number {\n    return this.bg & BgFlags.HAS_EXTENDED;\n  }\n  public updateExtended(): void {\n    if (this.extended.isEmpty()) {\n      this.bg &= ~BgFlags.HAS_EXTENDED;\n    } else {\n      this.bg |= BgFlags.HAS_EXTENDED;\n    }\n  }\n  public getUnderlineColor(): number {\n    if ((this.bg & BgFlags.HAS_EXTENDED) && ~this.extended.underlineColor) {\n      switch (this.extended.underlineColor & Attributes.CM_MASK) {\n        case Attributes.CM_P16:\n        case Attributes.CM_P256:  return this.extended.underlineColor & Attributes.PCOLOR_MASK;\n        case Attributes.CM_RGB:   return this.extended.underlineColor & Attributes.RGB_MASK;\n        default:                  return this.getFgColor();\n      }\n    }\n    return this.getFgColor();\n  }\n  public getUnderlineColorMode(): number {\n    return (this.bg & BgFlags.HAS_EXTENDED) && ~this.extended.underlineColor\n      ? this.extended.underlineColor & Attributes.CM_MASK\n      : this.getFgColorMode();\n  }\n  public isUnderlineColorRGB(): boolean {\n    return (this.bg & BgFlags.HAS_EXTENDED) && ~this.extended.underlineColor\n      ? (this.extended.underlineColor & Attributes.CM_MASK) === Attributes.CM_RGB\n      : this.isFgRGB();\n  }\n  public isUnderlineColorPalette(): boolean {\n    return (this.bg & BgFlags.HAS_EXTENDED) && ~this.extended.underlineColor\n      ? (this.extended.underlineColor & Attributes.CM_MASK) === Attributes.CM_P16\n          || (this.extended.underlineColor & Attributes.CM_MASK) === Attributes.CM_P256\n      : this.isFgPalette();\n  }\n  public isUnderlineColorDefault(): boolean {\n    return (this.bg & BgFlags.HAS_EXTENDED) && ~this.extended.underlineColor\n      ? (this.extended.underlineColor & Attributes.CM_MASK) === 0\n      : this.isFgDefault();\n  }\n  public getUnderlineStyle(): UnderlineStyle {\n    return this.fg & FgFlags.UNDERLINE\n      ? (this.bg & BgFlags.HAS_EXTENDED ? this.extended.underlineStyle : UnderlineStyle.SINGLE)\n      : UnderlineStyle.NONE;\n  }\n  public getUnderlineVariantOffset(): number {\n    return this.extended.underlineVariantOffset;\n  }\n}\n\n\n/**\n * Extended attributes for a cell.\n * Holds information about different underline styles and color.\n */\nexport class ExtendedAttrs implements IExtendedAttrs {\n  private _ext: number = 0;\n  public get ext(): number {\n    if (this._urlId) {\n      return (\n        (this._ext & ~ExtFlags.UNDERLINE_STYLE) |\n        (this.underlineStyle << 26)\n      );\n    }\n    return this._ext;\n  }\n  public set ext(value: number) { this._ext = value; }\n\n  public get underlineStyle(): UnderlineStyle {\n    // Always return the URL style if it has one\n    if (this._urlId) {\n      return UnderlineStyle.DASHED;\n    }\n    return (this._ext & ExtFlags.UNDERLINE_STYLE) >> 26;\n  }\n  public set underlineStyle(value: UnderlineStyle) {\n    this._ext &= ~ExtFlags.UNDERLINE_STYLE;\n    this._ext |= (value << 26) & ExtFlags.UNDERLINE_STYLE;\n  }\n\n  public get underlineColor(): number {\n    return this._ext & (Attributes.CM_MASK | Attributes.RGB_MASK);\n  }\n  public set underlineColor(value: number) {\n    this._ext &= ~(Attributes.CM_MASK | Attributes.RGB_MASK);\n    this._ext |= value & (Attributes.CM_MASK | Attributes.RGB_MASK);\n  }\n\n  private _urlId: number = 0;\n  public get urlId(): number {\n    return this._urlId;\n  }\n  public set urlId(value: number) {\n    this._urlId = value;\n  }\n\n  public get underlineVariantOffset(): number {\n    const val = (this._ext & ExtFlags.VARIANT_OFFSET) >> 29;\n    if (val < 0) {\n      return val ^ 0xFFFFFFF8;\n    }\n    return val;\n  }\n  public set underlineVariantOffset(value: number) {\n    this._ext &= ~ExtFlags.VARIANT_OFFSET;\n    this._ext |= (value << 29) & ExtFlags.VARIANT_OFFSET;\n  }\n\n  constructor(\n    ext: number = 0,\n    urlId: number = 0\n  ) {\n    this._ext = ext;\n    this._urlId = urlId;\n  }\n\n  public clone(): IExtendedAttrs {\n    return new ExtendedAttrs(this._ext, this._urlId);\n  }\n\n  /**\n   * Convenient method to indicate whether the object holds no additional information,\n   * that needs to be persistant in the buffer.\n   */\n  public isEmpty(): boolean {\n    return this.underlineStyle === UnderlineStyle.NONE && this._urlId === 0;\n  }\n}\n", "/**\n * Copyright (c) 2018 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { CharData, ICellData, IExtendedAttrs } from 'common/Types';\nimport { stringFromCodePoint } from 'common/input/TextDecoder';\nimport { CHAR_DATA_CHAR_INDEX, CHAR_DATA_WIDTH_INDEX, CHAR_DATA_ATTR_INDEX, Content } from 'common/buffer/Constants';\nimport { AttributeData, ExtendedAttrs } from 'common/buffer/AttributeData';\n\n/**\n * CellData - represents a single Cell in the terminal buffer.\n */\nexport class CellData extends AttributeData implements ICellData {\n  /** Helper to create CellData from CharData. */\n  public static fromCharData(value: CharData): CellData {\n    const obj = new CellData();\n    obj.setFromCharData(value);\n    return obj;\n  }\n  /** Primitives from terminal buffer. */\n  public content = 0;\n  public fg = 0;\n  public bg = 0;\n  public extended: IExtendedAttrs = new ExtendedAttrs();\n  public combinedData = '';\n  /** Whether cell contains a combined string. */\n  public isCombined(): number {\n    return this.content & Content.IS_COMBINED_MASK;\n  }\n  /** Width of the cell. */\n  public getWidth(): number {\n    return this.content >> Content.WIDTH_SHIFT;\n  }\n  /** JS string of the content. */\n  public getChars(): string {\n    if (this.content & Content.IS_COMBINED_MASK) {\n      return this.combinedData;\n    }\n    if (this.content & Content.CODEPOINT_MASK) {\n      return stringFromCodePoint(this.content & Content.CODEPOINT_MASK);\n    }\n    return '';\n  }\n  /**\n   * Codepoint of cell\n   * Note this returns the UTF32 codepoint of single chars,\n   * if content is a combined string it returns the codepoint\n   * of the last char in string to be in line with code in CharData.\n   */\n  public getCode(): number {\n    return (this.isCombined())\n      ? this.combinedData.charCodeAt(this.combinedData.length - 1)\n      : this.content & Content.CODEPOINT_MASK;\n  }\n  /** Set data from CharData */\n  public setFromCharData(value: CharData): void {\n    this.fg = value[CHAR_DATA_ATTR_INDEX];\n    this.bg = 0;\n    let combined = false;\n    // surrogates and combined strings need special treatment\n    if (value[CHAR_DATA_CHAR_INDEX].length > 2) {\n      combined = true;\n    }\n    else if (value[CHAR_DATA_CHAR_INDEX].length === 2) {\n      const code = value[CHAR_DATA_CHAR_INDEX].charCodeAt(0);\n      // if the 2-char string is a surrogate create single codepoint\n      // everything else is combined\n      if (0xD800 <= code && code <= 0xDBFF) {\n        const second = value[CHAR_DATA_CHAR_INDEX].charCodeAt(1);\n        if (0xDC00 <= second && second <= 0xDFFF) {\n          this.content = ((code - 0xD800) * 0x400 + second - 0xDC00 + 0x10000) | (value[CHAR_DATA_WIDTH_INDEX] << Content.WIDTH_SHIFT);\n        }\n        else {\n          combined = true;\n        }\n      }\n      else {\n        combined = true;\n      }\n    }\n    else {\n      this.content = value[CHAR_DATA_CHAR_INDEX].charCodeAt(0) | (value[CHAR_DATA_WIDTH_INDEX] << Content.WIDTH_SHIFT);\n    }\n    if (combined) {\n      this.combinedData = value[CHAR_DATA_CHAR_INDEX];\n      this.content = Content.IS_COMBINED_MASK | (value[CHAR_DATA_WIDTH_INDEX] << Content.WIDTH_SHIFT);\n    }\n  }\n  /** Get data as CharData. */\n  public getAsCharData(): CharData {\n    return [this.fg, this.getChars(), this.getWidth(), this.getCode()];\n  }\n}\n", "/**\n * Copyright (c) 2021 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { CellData } from 'common/buffer/CellData';\nimport { IBufferLine, ICellData } from 'common/Types';\nimport { IBufferCell as IBufferCellApi, IBufferLine as IBufferLineApi } from '@xterm/xterm';\n\nexport class BufferLineApiView implements IBufferLineApi {\n  constructor(private _line: IBufferLine) { }\n\n  public get isWrapped(): boolean { return this._line.isWrapped; }\n  public get length(): number { return this._line.length; }\n  public getCell(x: number, cell?: IBufferCellApi): IBufferCellApi | undefined {\n    if (x < 0 || x >= this._line.length) {\n      return undefined;\n    }\n\n    if (cell) {\n      this._line.loadCell(x, cell as ICellData);\n      return cell;\n    }\n    return this._line.loadCell(x, new CellData());\n  }\n  public translateToString(trimRight?: boolean, startColumn?: number, endColumn?: number): string {\n    return this._line.translateToString(trimRight, startColumn, endColumn);\n  }\n}\n", "/**\n * Copyright (c) 2021 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { IBuffer as IBufferApi, IBufferLine as IBufferLineApi, IBufferCell as IBufferCellApi } from '@xterm/xterm';\nimport { IBuffer } from 'common/buffer/Types';\nimport { BufferLineApiView } from 'common/public/BufferLineApiView';\nimport { CellData } from 'common/buffer/CellData';\n\nexport class BufferApiView implements IBufferApi {\n  constructor(\n    private _buffer: IBuffer,\n    public readonly type: 'normal' | 'alternate'\n  ) { }\n\n  public init(buffer: IBuffer): BufferApiView {\n    this._buffer = buffer;\n    return this;\n  }\n\n  public get cursorY(): number { return this._buffer.y; }\n  public get cursorX(): number { return this._buffer.x; }\n  public get viewportY(): number { return this._buffer.ydisp; }\n  public get baseY(): number { return this._buffer.ybase; }\n  public get length(): number { return this._buffer.lines.length; }\n  public getLine(y: number): IBufferLineApi | undefined {\n    const line = this._buffer.lines.get(y);\n    if (!line) {\n      return undefined;\n    }\n    return new BufferLineApiView(line);\n  }\n  public getNullCell(): IBufferCellApi { return new CellData(); }\n}\n", "/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\nexport interface ErrorListenerCallback {\n\t(error: any): void;\n}\n\nexport interface ErrorListenerUnbind {\n\t(): void;\n}\n\n// Avoid circular dependency on EventEmitter by implementing a subset of the interface.\nexport class ErrorHandler {\n\tprivate unexpectedErrorHandler: (e: any) => void;\n\tprivate listeners: ErrorListenerCallback[];\n\n\tconstructor() {\n\n\t\tthis.listeners = [];\n\n\t\tthis.unexpectedErrorHandler = function (e: any) {\n\t\t\tsetTimeout(() => {\n\t\t\t\tif (e.stack) {\n\t\t\t\t\tif (ErrorNoTelemetry.isErrorNoTelemetry(e)) {\n\t\t\t\t\t\tthrow new ErrorNoTelemetry(e.message + '\\n\\n' + e.stack);\n\t\t\t\t\t}\n\n\t\t\t\t\tthrow new Error(e.message + '\\n\\n' + e.stack);\n\t\t\t\t}\n\n\t\t\t\tthrow e;\n\t\t\t}, 0);\n\t\t};\n\t}\n\n\taddListener(listener: ErrorListenerCallback): ErrorListenerUnbind {\n\t\tthis.listeners.push(listener);\n\n\t\treturn () => {\n\t\t\tthis._removeListener(listener);\n\t\t};\n\t}\n\n\tprivate emit(e: any): void {\n\t\tthis.listeners.forEach((listener) => {\n\t\t\tlistener(e);\n\t\t});\n\t}\n\n\tprivate _removeListener(listener: ErrorListenerCallback): void {\n\t\tthis.listeners.splice(this.listeners.indexOf(listener), 1);\n\t}\n\n\tsetUnexpectedErrorHandler(newUnexpectedErrorHandler: (e: any) => void): void {\n\t\tthis.unexpectedErrorHandler = newUnexpectedErrorHandler;\n\t}\n\n\tgetUnexpectedErrorHandler(): (e: any) => void {\n\t\treturn this.unexpectedErrorHandler;\n\t}\n\n\tonUnexpectedError(e: any): void {\n\t\tthis.unexpectedErrorHandler(e);\n\t\tthis.emit(e);\n\t}\n\n\t// For external errors, we don't want the listeners to be called\n\tonUnexpectedExternalError(e: any): void {\n\t\tthis.unexpectedErrorHandler(e);\n\t}\n}\n\nexport const errorHandler = new ErrorHandler();\n\n/** @skipMangle */\nexport function setUnexpectedErrorHandler(newUnexpectedErrorHandler: (e: any) => void): void {\n\terrorHandler.setUnexpectedErrorHandler(newUnexpectedErrorHandler);\n}\n\n/**\n * Returns if the error is a SIGPIPE error. SIGPIPE errors should generally be\n * logged at most once, to avoid a loop.\n *\n * @see https://github.com/microsoft/vscode-remote-release/issues/6481\n */\nexport function isSigPipeError(e: unknown): e is Error {\n\tif (!e || typeof e !== 'object') {\n\t\treturn false;\n\t}\n\n\tconst cast = e as Record<string, string | undefined>;\n\treturn cast.code === 'EPIPE' && cast.syscall?.toUpperCase() === 'WRITE';\n}\n\nexport function onUnexpectedError(e: any): undefined {\n\t// ignore errors from cancelled promises\n\tif (!isCancellationError(e)) {\n\t\terrorHandler.onUnexpectedError(e);\n\t}\n\treturn undefined;\n}\n\nexport function onUnexpectedExternalError(e: any): undefined {\n\t// ignore errors from cancelled promises\n\tif (!isCancellationError(e)) {\n\t\terrorHandler.onUnexpectedExternalError(e);\n\t}\n\treturn undefined;\n}\n\nexport interface SerializedError {\n\treadonly $isError: true;\n\treadonly name: string;\n\treadonly message: string;\n\treadonly stack: string;\n\treadonly noTelemetry: boolean;\n}\n\nexport function transformErrorForSerialization(error: Error): SerializedError;\nexport function transformErrorForSerialization(error: any): any;\nexport function transformErrorForSerialization(error: any): any {\n\tif (error instanceof Error) {\n\t\tconst { name, message } = error;\n\t\tconst stack: string = (<any>error).stacktrace || (<any>error).stack;\n\t\treturn {\n\t\t\t$isError: true,\n\t\t\tname,\n\t\t\tmessage,\n\t\t\tstack,\n\t\t\tnoTelemetry: ErrorNoTelemetry.isErrorNoTelemetry(error)\n\t\t};\n\t}\n\n\t// return as is\n\treturn error;\n}\n\nexport function transformErrorFromSerialization(data: SerializedError): Error {\n\tlet error: Error;\n\tif (data.noTelemetry) {\n\t\terror = new ErrorNoTelemetry();\n\t} else {\n\t\terror = new Error();\n\t\terror.name = data.name;\n\t}\n\terror.message = data.message;\n\terror.stack = data.stack;\n\treturn error;\n}\n\n// see https://github.com/v8/v8/wiki/Stack%20Trace%20API#basic-stack-traces\nexport interface V8CallSite {\n\tgetThis(): unknown;\n\tgetTypeName(): string | null;\n\tgetFunction(): Function | undefined;\n\tgetFunctionName(): string | null;\n\tgetMethodName(): string | null;\n\tgetFileName(): string | null;\n\tgetLineNumber(): number | null;\n\tgetColumnNumber(): number | null;\n\tgetEvalOrigin(): string | undefined;\n\tisToplevel(): boolean;\n\tisEval(): boolean;\n\tisNative(): boolean;\n\tisConstructor(): boolean;\n\ttoString(): string;\n}\n\nconst canceledName = 'Canceled';\n\n/**\n * Checks if the given error is a promise in canceled state\n */\nexport function isCancellationError(error: any): boolean {\n\tif (error instanceof CancellationError) {\n\t\treturn true;\n\t}\n\treturn error instanceof Error && error.name === canceledName && error.message === canceledName;\n}\n\n// !!!IMPORTANT!!!\n// Do NOT change this class because it is also used as an API-type.\nexport class CancellationError extends Error {\n\tconstructor() {\n\t\tsuper(canceledName);\n\t\tthis.name = this.message;\n\t}\n}\n\n/**\n * @deprecated use {@link CancellationError `new CancellationError()`} instead\n */\nexport function canceled(): Error {\n\tconst error = new Error(canceledName);\n\terror.name = error.message;\n\treturn error;\n}\n\nexport function illegalArgument(name?: string): Error {\n\tif (name) {\n\t\treturn new Error(`Illegal argument: ${name}`);\n\t} else {\n\t\treturn new Error('Illegal argument');\n\t}\n}\n\nexport function illegalState(name?: string): Error {\n\tif (name) {\n\t\treturn new Error(`Illegal state: ${name}`);\n\t} else {\n\t\treturn new Error('Illegal state');\n\t}\n}\n\nexport class ReadonlyError extends TypeError {\n\tconstructor(name?: string) {\n\t\tsuper(name ? `${name} is read-only and cannot be changed` : 'Cannot change read-only property');\n\t}\n}\n\nexport function getErrorMessage(err: any): string {\n\tif (!err) {\n\t\treturn 'Error';\n\t}\n\n\tif (err.message) {\n\t\treturn err.message;\n\t}\n\n\tif (err.stack) {\n\t\treturn err.stack.split('\\n')[0];\n\t}\n\n\treturn String(err);\n}\n\nexport class NotImplementedError extends Error {\n\tconstructor(message?: string) {\n\t\tsuper('NotImplemented');\n\t\tif (message) {\n\t\t\tthis.message = message;\n\t\t}\n\t}\n}\n\nexport class NotSupportedError extends Error {\n\tconstructor(message?: string) {\n\t\tsuper('NotSupported');\n\t\tif (message) {\n\t\t\tthis.message = message;\n\t\t}\n\t}\n}\n\nexport class ExpectedError extends Error {\n\treadonly isExpected = true;\n}\n\n/**\n * Error that when thrown won't be logged in telemetry as an unhandled error.\n */\nexport class ErrorNoTelemetry extends Error {\n\toverride readonly name: string;\n\n\tconstructor(msg?: string) {\n\t\tsuper(msg);\n\t\tthis.name = 'CodeExpectedError';\n\t}\n\n\tpublic static fromError(err: Error): ErrorNoTelemetry {\n\t\tif (err instanceof ErrorNoTelemetry) {\n\t\t\treturn err;\n\t\t}\n\n\t\tconst result = new ErrorNoTelemetry();\n\t\tresult.message = err.message;\n\t\tresult.stack = err.stack;\n\t\treturn result;\n\t}\n\n\tpublic static isErrorNoTelemetry(err: Error): err is ErrorNoTelemetry {\n\t\treturn err.name === 'CodeExpectedError';\n\t}\n}\n\n/**\n * This error indicates a bug.\n * Do not throw this for invalid user input.\n * Only catch this error to recover gracefully from bugs.\n */\nexport class BugIndicatingError extends Error {\n\tconstructor(message?: string) {\n\t\tsuper(message || 'An unexpected bug occurred.');\n\t\tObject.setPrototypeOf(this, BugIndicatingError.prototype);\n\n\t\t// Because we know for sure only buggy code throws this,\n\t\t// we definitely want to break here and fix the bug.\n\t\t// eslint-disable-next-line no-debugger\n\t\t// debugger;\n\t}\n}\n", "/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\nimport { Comparator } from './arrays';\n\nexport function findLast<T>(array: readonly T[], predicate: (item: T) => boolean): T | undefined {\n\tconst idx = findLastIdx(array, predicate);\n\tif (idx === -1) {\n\t\treturn undefined;\n\t}\n\treturn array[idx];\n}\n\nexport function findLastIdx<T>(array: readonly T[], predicate: (item: T) => boolean, fromIndex = array.length - 1): number {\n\tfor (let i = fromIndex; i >= 0; i--) {\n\t\tconst element = array[i];\n\n\t\tif (predicate(element)) {\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn -1;\n}\n\n/**\n * Finds the last item where predicate is true using binary search.\n * `predicate` must be monotonous, i.e. `arr.map(predicate)` must be like `[true, ..., true, false, ..., false]`!\n *\n * @returns `undefined` if no item matches, otherwise the last item that matches the predicate.\n */\nexport function findLastMonotonous<T>(array: readonly T[], predicate: (item: T) => boolean): T | undefined {\n\tconst idx = findLastIdxMonotonous(array, predicate);\n\treturn idx === -1 ? undefined : array[idx];\n}\n\n/**\n * Finds the last item where predicate is true using binary search.\n * `predicate` must be monotonous, i.e. `arr.map(predicate)` must be like `[true, ..., true, false, ..., false]`!\n *\n * @returns `startIdx - 1` if predicate is false for all items, otherwise the index of the last item that matches the predicate.\n */\nexport function findLastIdxMonotonous<T>(array: readonly T[], predicate: (item: T) => boolean, startIdx = 0, endIdxEx = array.length): number {\n\tlet i = startIdx;\n\tlet j = endIdxEx;\n\twhile (i < j) {\n\t\tconst k = Math.floor((i + j) / 2);\n\t\tif (predicate(array[k])) {\n\t\t\ti = k + 1;\n\t\t} else {\n\t\t\tj = k;\n\t\t}\n\t}\n\treturn i - 1;\n}\n\n/**\n * Finds the first item where predicate is true using binary search.\n * `predicate` must be monotonous, i.e. `arr.map(predicate)` must be like `[false, ..., false, true, ..., true]`!\n *\n * @returns `undefined` if no item matches, otherwise the first item that matches the predicate.\n */\nexport function findFirstMonotonous<T>(array: readonly T[], predicate: (item: T) => boolean): T | undefined {\n\tconst idx = findFirstIdxMonotonousOrArrLen(array, predicate);\n\treturn idx === array.length ? undefined : array[idx];\n}\n\n/**\n * Finds the first item where predicate is true using binary search.\n * `predicate` must be monotonous, i.e. `arr.map(predicate)` must be like `[false, ..., false, true, ..., true]`!\n *\n * @returns `endIdxEx` if predicate is false for all items, otherwise the index of the first item that matches the predicate.\n */\nexport function findFirstIdxMonotonousOrArrLen<T>(array: readonly T[], predicate: (item: T) => boolean, startIdx = 0, endIdxEx = array.length): number {\n\tlet i = startIdx;\n\tlet j = endIdxEx;\n\twhile (i < j) {\n\t\tconst k = Math.floor((i + j) / 2);\n\t\tif (predicate(array[k])) {\n\t\t\tj = k;\n\t\t} else {\n\t\t\ti = k + 1;\n\t\t}\n\t}\n\treturn i;\n}\n\nexport function findFirstIdxMonotonous<T>(array: readonly T[], predicate: (item: T) => boolean, startIdx = 0, endIdxEx = array.length): number {\n\tconst idx = findFirstIdxMonotonousOrArrLen(array, predicate, startIdx, endIdxEx);\n\treturn idx === array.length ? -1 : idx;\n}\n\n/**\n * Use this when\n * * You have a sorted array\n * * You query this array with a monotonous predicate to find the last item that has a certain property.\n * * You query this array multiple times with monotonous predicates that get weaker and weaker.\n */\nexport class MonotonousArray<T> {\n\tpublic static assertInvariants = false;\n\n\tprivate _findLastMonotonousLastIdx = 0;\n\tprivate _prevFindLastPredicate: ((item: T) => boolean) | undefined;\n\n\tconstructor(private readonly _array: readonly T[]) {\n\t}\n\n\t/**\n\t * The predicate must be monotonous, i.e. `arr.map(predicate)` must be like `[true, ..., true, false, ..., false]`!\n\t * For subsequent calls, current predicate must be weaker than (or equal to) the previous predicate, i.e. more entries must be `true`.\n\t */\n\tfindLastMonotonous(predicate: (item: T) => boolean): T | undefined {\n\t\tif (MonotonousArray.assertInvariants) {\n\t\t\tif (this._prevFindLastPredicate) {\n\t\t\t\tfor (const item of this._array) {\n\t\t\t\t\tif (this._prevFindLastPredicate(item) && !predicate(item)) {\n\t\t\t\t\t\tthrow new Error('MonotonousArray: current predicate must be weaker than (or equal to) the previous predicate.');\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\tthis._prevFindLastPredicate = predicate;\n\t\t}\n\n\t\tconst idx = findLastIdxMonotonous(this._array, predicate, this._findLastMonotonousLastIdx);\n\t\tthis._findLastMonotonousLastIdx = idx + 1;\n\t\treturn idx === -1 ? undefined : this._array[idx];\n\t}\n}\n\n/**\n * Returns the first item that is equal to or greater than every other item.\n*/\nexport function findFirstMax<T>(array: readonly T[], comparator: Comparator<T>): T | undefined {\n\tif (array.length === 0) {\n\t\treturn undefined;\n\t}\n\n\tlet max = array[0];\n\tfor (let i = 1; i < array.length; i++) {\n\t\tconst item = array[i];\n\t\tif (comparator(item, max) > 0) {\n\t\t\tmax = item;\n\t\t}\n\t}\n\treturn max;\n}\n\n/**\n * Returns the last item that is equal to or greater than every other item.\n*/\nexport function findLastMax<T>(array: readonly T[], comparator: Comparator<T>): T | undefined {\n\tif (array.length === 0) {\n\t\treturn undefined;\n\t}\n\n\tlet max = array[0];\n\tfor (let i = 1; i < array.length; i++) {\n\t\tconst item = array[i];\n\t\tif (comparator(item, max) >= 0) {\n\t\t\tmax = item;\n\t\t}\n\t}\n\treturn max;\n}\n\n/**\n * Returns the first item that is equal to or less than every other item.\n*/\nexport function findFirstMin<T>(array: readonly T[], comparator: Comparator<T>): T | undefined {\n\treturn findFirstMax(array, (a, b) => -comparator(a, b));\n}\n\nexport function findMaxIdx<T>(array: readonly T[], comparator: Comparator<T>): number {\n\tif (array.length === 0) {\n\t\treturn -1;\n\t}\n\n\tlet maxIdx = 0;\n\tfor (let i = 1; i < array.length; i++) {\n\t\tconst item = array[i];\n\t\tif (comparator(item, array[maxIdx]) > 0) {\n\t\t\tmaxIdx = i;\n\t\t}\n\t}\n\treturn maxIdx;\n}\n\n/**\n * Returns the first mapped value of the array which is not undefined.\n */\nexport function mapFindFirst<T, R>(items: Iterable<T>, mapFn: (value: T) => R | undefined): R | undefined {\n\tfor (const value of items) {\n\t\tconst mapped = mapFn(value);\n\t\tif (mapped !== undefined) {\n\t\t\treturn mapped;\n\t\t}\n\t}\n\n\treturn undefined;\n}\n", "/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\nimport { CancellationToken } from 'vs/base/common/cancellation';\nimport { CancellationError } from 'vs/base/common/errors';\nimport { ISplice } from 'vs/base/common/sequence';\nimport { findFirstIdxMonotonousOrArrLen } from './arraysFind';\n\n/**\n * Returns the last element of an array.\n * @param array The array.\n * @param n Which element from the end (default is zero).\n */\nexport function tail<T>(array: ArrayLike<T>, n: number = 0): T | undefined {\n\treturn array[array.length - (1 + n)];\n}\n\nexport function tail2<T>(arr: T[]): [T[], T] {\n\tif (arr.length === 0) {\n\t\tthrow new Error('Invalid tail call');\n\t}\n\n\treturn [arr.slice(0, arr.length - 1), arr[arr.length - 1]];\n}\n\nexport function equals<T>(one: ReadonlyArray<T> | undefined, other: ReadonlyArray<T> | undefined, itemEquals: (a: T, b: T) => boolean = (a, b) => a === b): boolean {\n\tif (one === other) {\n\t\treturn true;\n\t}\n\n\tif (!one || !other) {\n\t\treturn false;\n\t}\n\n\tif (one.length !== other.length) {\n\t\treturn false;\n\t}\n\n\tfor (let i = 0, len = one.length; i < len; i++) {\n\t\tif (!itemEquals(one[i], other[i])) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\treturn true;\n}\n\n/**\n * Remove the element at `index` by replacing it with the last element. This is faster than `splice`\n * but changes the order of the array\n */\nexport function removeFastWithoutKeepingOrder<T>(array: T[], index: number) {\n\tconst last = array.length - 1;\n\tif (index < last) {\n\t\tarray[index] = array[last];\n\t}\n\tarray.pop();\n}\n\n/**\n * Performs a binary search algorithm over a sorted array.\n *\n * @param array The array being searched.\n * @param key The value we search for.\n * @param comparator A function that takes two array elements and returns zero\n *   if they are equal, a negative number if the first element precedes the\n *   second one in the sorting order, or a positive number if the second element\n *   precedes the first one.\n * @return See {@link binarySearch2}\n */\nexport function binarySearch<T>(array: ReadonlyArray<T>, key: T, comparator: (op1: T, op2: T) => number): number {\n\treturn binarySearch2(array.length, i => comparator(array[i], key));\n}\n\n/**\n * Performs a binary search algorithm over a sorted collection. Useful for cases\n * when we need to perform a binary search over something that isn't actually an\n * array, and converting data to an array would defeat the use of binary search\n * in the first place.\n *\n * @param length The collection length.\n * @param compareToKey A function that takes an index of an element in the\n *   collection and returns zero if the value at this index is equal to the\n *   search key, a negative number if the value precedes the search key in the\n *   sorting order, or a positive number if the search key precedes the value.\n * @return A non-negative index of an element, if found. If not found, the\n *   result is -(n+1) (or ~n, using bitwise notation), where n is the index\n *   where the key should be inserted to maintain the sorting order.\n */\nexport function binarySearch2(length: number, compareToKey: (index: number) => number): number {\n\tlet low = 0,\n\t\thigh = length - 1;\n\n\twhile (low <= high) {\n\t\tconst mid = ((low + high) / 2) | 0;\n\t\tconst comp = compareToKey(mid);\n\t\tif (comp < 0) {\n\t\t\tlow = mid + 1;\n\t\t} else if (comp > 0) {\n\t\t\thigh = mid - 1;\n\t\t} else {\n\t\t\treturn mid;\n\t\t}\n\t}\n\treturn -(low + 1);\n}\n\ntype Compare<T> = (a: T, b: T) => number;\n\n\nexport function quickSelect<T>(nth: number, data: T[], compare: Compare<T>): T {\n\n\tnth = nth | 0;\n\n\tif (nth >= data.length) {\n\t\tthrow new TypeError('invalid index');\n\t}\n\n\tconst pivotValue = data[Math.floor(data.length * Math.random())];\n\tconst lower: T[] = [];\n\tconst higher: T[] = [];\n\tconst pivots: T[] = [];\n\n\tfor (const value of data) {\n\t\tconst val = compare(value, pivotValue);\n\t\tif (val < 0) {\n\t\t\tlower.push(value);\n\t\t} else if (val > 0) {\n\t\t\thigher.push(value);\n\t\t} else {\n\t\t\tpivots.push(value);\n\t\t}\n\t}\n\n\tif (nth < lower.length) {\n\t\treturn quickSelect(nth, lower, compare);\n\t} else if (nth < lower.length + pivots.length) {\n\t\treturn pivots[0];\n\t} else {\n\t\treturn quickSelect(nth - (lower.length + pivots.length), higher, compare);\n\t}\n}\n\nexport function groupBy<T>(data: ReadonlyArray<T>, compare: (a: T, b: T) => number): T[][] {\n\tconst result: T[][] = [];\n\tlet currentGroup: T[] | undefined = undefined;\n\tfor (const element of data.slice(0).sort(compare)) {\n\t\tif (!currentGroup || compare(currentGroup[0], element) !== 0) {\n\t\t\tcurrentGroup = [element];\n\t\t\tresult.push(currentGroup);\n\t\t} else {\n\t\t\tcurrentGroup.push(element);\n\t\t}\n\t}\n\treturn result;\n}\n\n/**\n * Splits the given items into a list of (non-empty) groups.\n * `shouldBeGrouped` is used to decide if two consecutive items should be in the same group.\n * The order of the items is preserved.\n */\nexport function* groupAdjacentBy<T>(items: Iterable<T>, shouldBeGrouped: (item1: T, item2: T) => boolean): Iterable<T[]> {\n\tlet currentGroup: T[] | undefined;\n\tlet last: T | undefined;\n\tfor (const item of items) {\n\t\tif (last !== undefined && shouldBeGrouped(last, item)) {\n\t\t\tcurrentGroup!.push(item);\n\t\t} else {\n\t\t\tif (currentGroup) {\n\t\t\t\tyield currentGroup;\n\t\t\t}\n\t\t\tcurrentGroup = [item];\n\t\t}\n\t\tlast = item;\n\t}\n\tif (currentGroup) {\n\t\tyield currentGroup;\n\t}\n}\n\nexport function forEachAdjacent<T>(arr: T[], f: (item1: T | undefined, item2: T | undefined) => void): void {\n\tfor (let i = 0; i <= arr.length; i++) {\n\t\tf(i === 0 ? undefined : arr[i - 1], i === arr.length ? undefined : arr[i]);\n\t}\n}\n\nexport function forEachWithNeighbors<T>(arr: T[], f: (before: T | undefined, element: T, after: T | undefined) => void): void {\n\tfor (let i = 0; i < arr.length; i++) {\n\t\tf(i === 0 ? undefined : arr[i - 1], arr[i], i + 1 === arr.length ? undefined : arr[i + 1]);\n\t}\n}\n\ninterface IMutableSplice<T> extends ISplice<T> {\n\treadonly toInsert: T[];\n\tdeleteCount: number;\n}\n\n/**\n * Diffs two *sorted* arrays and computes the splices which apply the diff.\n */\nexport function sortedDiff<T>(before: ReadonlyArray<T>, after: ReadonlyArray<T>, compare: (a: T, b: T) => number): ISplice<T>[] {\n\tconst result: IMutableSplice<T>[] = [];\n\n\tfunction pushSplice(start: number, deleteCount: number, toInsert: T[]): void {\n\t\tif (deleteCount === 0 && toInsert.length === 0) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst latest = result[result.length - 1];\n\n\t\tif (latest && latest.start + latest.deleteCount === start) {\n\t\t\tlatest.deleteCount += deleteCount;\n\t\t\tlatest.toInsert.push(...toInsert);\n\t\t} else {\n\t\t\tresult.push({ start, deleteCount, toInsert });\n\t\t}\n\t}\n\n\tlet beforeIdx = 0;\n\tlet afterIdx = 0;\n\n\twhile (true) {\n\t\tif (beforeIdx === before.length) {\n\t\t\tpushSplice(beforeIdx, 0, after.slice(afterIdx));\n\t\t\tbreak;\n\t\t}\n\t\tif (afterIdx === after.length) {\n\t\t\tpushSplice(beforeIdx, before.length - beforeIdx, []);\n\t\t\tbreak;\n\t\t}\n\n\t\tconst beforeElement = before[beforeIdx];\n\t\tconst afterElement = after[afterIdx];\n\t\tconst n = compare(beforeElement, afterElement);\n\t\tif (n === 0) {\n\t\t\t// equal\n\t\t\tbeforeIdx += 1;\n\t\t\tafterIdx += 1;\n\t\t} else if (n < 0) {\n\t\t\t// beforeElement is smaller -> before element removed\n\t\t\tpushSplice(beforeIdx, 1, []);\n\t\t\tbeforeIdx += 1;\n\t\t} else if (n > 0) {\n\t\t\t// beforeElement is greater -> after element added\n\t\t\tpushSplice(beforeIdx, 0, [afterElement]);\n\t\t\tafterIdx += 1;\n\t\t}\n\t}\n\n\treturn result;\n}\n\n/**\n * Takes two *sorted* arrays and computes their delta (removed, added elements).\n * Finishes in `Math.min(before.length, after.length)` steps.\n */\nexport function delta<T>(before: ReadonlyArray<T>, after: ReadonlyArray<T>, compare: (a: T, b: T) => number): { removed: T[]; added: T[] } {\n\tconst splices = sortedDiff(before, after, compare);\n\tconst removed: T[] = [];\n\tconst added: T[] = [];\n\n\tfor (const splice of splices) {\n\t\tremoved.push(...before.slice(splice.start, splice.start + splice.deleteCount));\n\t\tadded.push(...splice.toInsert);\n\t}\n\n\treturn { removed, added };\n}\n\n/**\n * Returns the top N elements from the array.\n *\n * Faster than sorting the entire array when the array is a lot larger than N.\n *\n * @param array The unsorted array.\n * @param compare A sort function for the elements.\n * @param n The number of elements to return.\n * @return The first n elements from array when sorted with compare.\n */\nexport function top<T>(array: ReadonlyArray<T>, compare: (a: T, b: T) => number, n: number): T[] {\n\tif (n === 0) {\n\t\treturn [];\n\t}\n\tconst result = array.slice(0, n).sort(compare);\n\ttopStep(array, compare, result, n, array.length);\n\treturn result;\n}\n\n/**\n * Asynchronous variant of `top()` allowing for splitting up work in batches between which the event loop can run.\n *\n * Returns the top N elements from the array.\n *\n * Faster than sorting the entire array when the array is a lot larger than N.\n *\n * @param array The unsorted array.\n * @param compare A sort function for the elements.\n * @param n The number of elements to return.\n * @param batch The number of elements to examine before yielding to the event loop.\n * @return The first n elements from array when sorted with compare.\n */\nexport function topAsync<T>(array: T[], compare: (a: T, b: T) => number, n: number, batch: number, token?: CancellationToken): Promise<T[]> {\n\tif (n === 0) {\n\t\treturn Promise.resolve([]);\n\t}\n\n\treturn new Promise((resolve, reject) => {\n\t\t(async () => {\n\t\t\tconst o = array.length;\n\t\t\tconst result = array.slice(0, n).sort(compare);\n\t\t\tfor (let i = n, m = Math.min(n + batch, o); i < o; i = m, m = Math.min(m + batch, o)) {\n\t\t\t\tif (i > n) {\n\t\t\t\t\tawait new Promise(resolve => setTimeout(resolve)); // any other delay function would starve I/O\n\t\t\t\t}\n\t\t\t\tif (token && token.isCancellationRequested) {\n\t\t\t\t\tthrow new CancellationError();\n\t\t\t\t}\n\t\t\t\ttopStep(array, compare, result, i, m);\n\t\t\t}\n\t\t\treturn result;\n\t\t})()\n\t\t\t.then(resolve, reject);\n\t});\n}\n\nfunction topStep<T>(array: ReadonlyArray<T>, compare: (a: T, b: T) => number, result: T[], i: number, m: number): void {\n\tfor (const n = result.length; i < m; i++) {\n\t\tconst element = array[i];\n\t\tif (compare(element, result[n - 1]) < 0) {\n\t\t\tresult.pop();\n\t\t\tconst j = findFirstIdxMonotonousOrArrLen(result, e => compare(element, e) < 0);\n\t\t\tresult.splice(j, 0, element);\n\t\t}\n\t}\n}\n\n/**\n * @returns New array with all falsy values removed. The original array IS NOT modified.\n */\nexport function coalesce<T>(array: ReadonlyArray<T | undefined | null>): T[] {\n\treturn array.filter((e): e is T => !!e);\n}\n\n/**\n * Remove all falsy values from `array`. The original array IS modified.\n */\nexport function coalesceInPlace<T>(array: Array<T | undefined | null>): asserts array is Array<T> {\n\tlet to = 0;\n\tfor (let i = 0; i < array.length; i++) {\n\t\tif (!!array[i]) {\n\t\t\tarray[to] = array[i];\n\t\t\tto += 1;\n\t\t}\n\t}\n\tarray.length = to;\n}\n\n/**\n * @deprecated Use `Array.copyWithin` instead\n */\nexport function move(array: any[], from: number, to: number): void {\n\tarray.splice(to, 0, array.splice(from, 1)[0]);\n}\n\n/**\n * @returns false if the provided object is an array and not empty.\n */\nexport function isFalsyOrEmpty(obj: any): boolean {\n\treturn !Array.isArray(obj) || obj.length === 0;\n}\n\n/**\n * @returns True if the provided object is an array and has at least one element.\n */\nexport function isNonEmptyArray<T>(obj: T[] | undefined | null): obj is T[];\nexport function isNonEmptyArray<T>(obj: readonly T[] | undefined | null): obj is readonly T[];\nexport function isNonEmptyArray<T>(obj: T[] | readonly T[] | undefined | null): obj is T[] | readonly T[] {\n\treturn Array.isArray(obj) && obj.length > 0;\n}\n\n/**\n * Removes duplicates from the given array. The optional keyFn allows to specify\n * how elements are checked for equality by returning an alternate value for each.\n */\nexport function distinct<T>(array: ReadonlyArray<T>, keyFn: (value: T) => any = value => value): T[] {\n\tconst seen = new Set<any>();\n\n\treturn array.filter(element => {\n\t\tconst key = keyFn!(element);\n\t\tif (seen.has(key)) {\n\t\t\treturn false;\n\t\t}\n\t\tseen.add(key);\n\t\treturn true;\n\t});\n}\n\nexport function uniqueFilter<T, R>(keyFn: (t: T) => R): (t: T) => boolean {\n\tconst seen = new Set<R>();\n\n\treturn element => {\n\t\tconst key = keyFn(element);\n\n\t\tif (seen.has(key)) {\n\t\t\treturn false;\n\t\t}\n\n\t\tseen.add(key);\n\t\treturn true;\n\t};\n}\n\nexport function firstOrDefault<T, NotFound = T>(array: ReadonlyArray<T>, notFoundValue: NotFound): T | NotFound;\nexport function firstOrDefault<T>(array: ReadonlyArray<T>): T | undefined;\nexport function firstOrDefault<T, NotFound = T>(array: ReadonlyArray<T>, notFoundValue?: NotFound): T | NotFound | undefined {\n\treturn array.length > 0 ? array[0] : notFoundValue;\n}\n\nexport function lastOrDefault<T, NotFound = T>(array: ReadonlyArray<T>, notFoundValue: NotFound): T | NotFound;\nexport function lastOrDefault<T>(array: ReadonlyArray<T>): T | undefined;\nexport function lastOrDefault<T, NotFound = T>(array: ReadonlyArray<T>, notFoundValue?: NotFound): T | NotFound | undefined {\n\treturn array.length > 0 ? array[array.length - 1] : notFoundValue;\n}\n\nexport function commonPrefixLength<T>(one: ReadonlyArray<T>, other: ReadonlyArray<T>, equals: (a: T, b: T) => boolean = (a, b) => a === b): number {\n\tlet result = 0;\n\n\tfor (let i = 0, len = Math.min(one.length, other.length); i < len && equals(one[i], other[i]); i++) {\n\t\tresult++;\n\t}\n\n\treturn result;\n}\n\nexport function range(to: number): number[];\nexport function range(from: number, to: number): number[];\nexport function range(arg: number, to?: number): number[] {\n\tlet from = typeof to === 'number' ? arg : 0;\n\n\tif (typeof to === 'number') {\n\t\tfrom = arg;\n\t} else {\n\t\tfrom = 0;\n\t\tto = arg;\n\t}\n\n\tconst result: number[] = [];\n\n\tif (from <= to) {\n\t\tfor (let i = from; i < to; i++) {\n\t\t\tresult.push(i);\n\t\t}\n\t} else {\n\t\tfor (let i = from; i > to; i--) {\n\t\t\tresult.push(i);\n\t\t}\n\t}\n\n\treturn result;\n}\n\nexport function index<T>(array: ReadonlyArray<T>, indexer: (t: T) => string): { [key: string]: T };\nexport function index<T, R>(array: ReadonlyArray<T>, indexer: (t: T) => string, mapper: (t: T) => R): { [key: string]: R };\nexport function index<T, R>(array: ReadonlyArray<T>, indexer: (t: T) => string, mapper?: (t: T) => R): { [key: string]: R } {\n\treturn array.reduce((r, t) => {\n\t\tr[indexer(t)] = mapper ? mapper(t) : t;\n\t\treturn r;\n\t}, Object.create(null));\n}\n\n/**\n * Inserts an element into an array. Returns a function which, when\n * called, will remove that element from the array.\n *\n * @deprecated In almost all cases, use a `Set<T>` instead.\n */\nexport function insert<T>(array: T[], element: T): () => void {\n\tarray.push(element);\n\n\treturn () => remove(array, element);\n}\n\n/**\n * Removes an element from an array if it can be found.\n *\n * @deprecated In almost all cases, use a `Set<T>` instead.\n */\nexport function remove<T>(array: T[], element: T): T | undefined {\n\tconst index = array.indexOf(element);\n\tif (index > -1) {\n\t\tarray.splice(index, 1);\n\n\t\treturn element;\n\t}\n\n\treturn undefined;\n}\n\n/**\n * Insert `insertArr` inside `target` at `insertIndex`.\n * Please don't touch unless you understand https://jsperf.com/inserting-an-array-within-an-array\n */\nexport function arrayInsert<T>(target: T[], insertIndex: number, insertArr: T[]): T[] {\n\tconst before = target.slice(0, insertIndex);\n\tconst after = target.slice(insertIndex);\n\treturn before.concat(insertArr, after);\n}\n\n/**\n * Uses Fisher-Yates shuffle to shuffle the given array\n */\nexport function shuffle<T>(array: T[], _seed?: number): void {\n\tlet rand: () => number;\n\n\tif (typeof _seed === 'number') {\n\t\tlet seed = _seed;\n\t\t// Seeded random number generator in JS. Modified from:\n\t\t// https://stackoverflow.com/questions/521295/seeding-the-random-number-generator-in-javascript\n\t\trand = () => {\n\t\t\tconst x = Math.sin(seed++) * 179426549; // throw away most significant digits and reduce any potential bias\n\t\t\treturn x - Math.floor(x);\n\t\t};\n\t} else {\n\t\trand = Math.random;\n\t}\n\n\tfor (let i = array.length - 1; i > 0; i -= 1) {\n\t\tconst j = Math.floor(rand() * (i + 1));\n\t\tconst temp = array[i];\n\t\tarray[i] = array[j];\n\t\tarray[j] = temp;\n\t}\n}\n\n/**\n * Pushes an element to the start of the array, if found.\n */\nexport function pushToStart<T>(arr: T[], value: T): void {\n\tconst index = arr.indexOf(value);\n\n\tif (index > -1) {\n\t\tarr.splice(index, 1);\n\t\tarr.unshift(value);\n\t}\n}\n\n/**\n * Pushes an element to the end of the array, if found.\n */\nexport function pushToEnd<T>(arr: T[], value: T): void {\n\tconst index = arr.indexOf(value);\n\n\tif (index > -1) {\n\t\tarr.splice(index, 1);\n\t\tarr.push(value);\n\t}\n}\n\nexport function pushMany<T>(arr: T[], items: ReadonlyArray<T>): void {\n\tfor (const item of items) {\n\t\tarr.push(item);\n\t}\n}\n\nexport function mapArrayOrNot<T, U>(items: T | T[], fn: (_: T) => U): U | U[] {\n\treturn Array.isArray(items) ?\n\t\titems.map(fn) :\n\t\tfn(items);\n}\n\nexport function asArray<T>(x: T | T[]): T[];\nexport function asArray<T>(x: T | readonly T[]): readonly T[];\nexport function asArray<T>(x: T | T[]): T[] {\n\treturn Array.isArray(x) ? x : [x];\n}\n\nexport function getRandomElement<T>(arr: T[]): T | undefined {\n\treturn arr[Math.floor(Math.random() * arr.length)];\n}\n\n/**\n * Insert the new items in the array.\n * @param array The original array.\n * @param start The zero-based location in the array from which to start inserting elements.\n * @param newItems The items to be inserted\n */\nexport function insertInto<T>(array: T[], start: number, newItems: T[]): void {\n\tconst startIdx = getActualStartIndex(array, start);\n\tconst originalLength = array.length;\n\tconst newItemsLength = newItems.length;\n\tarray.length = originalLength + newItemsLength;\n\t// Move the items after the start index, start from the end so that we don't overwrite any value.\n\tfor (let i = originalLength - 1; i >= startIdx; i--) {\n\t\tarray[i + newItemsLength] = array[i];\n\t}\n\n\tfor (let i = 0; i < newItemsLength; i++) {\n\t\tarray[i + startIdx] = newItems[i];\n\t}\n}\n\n/**\n * Removes elements from an array and inserts new elements in their place, returning the deleted elements. Alternative to the native Array.splice method, it\n * can only support limited number of items due to the maximum call stack size limit.\n * @param array The original array.\n * @param start The zero-based location in the array from which to start removing elements.\n * @param deleteCount The number of elements to remove.\n * @returns An array containing the elements that were deleted.\n */\nexport function splice<T>(array: T[], start: number, deleteCount: number, newItems: T[]): T[] {\n\tconst index = getActualStartIndex(array, start);\n\tlet result = array.splice(index, deleteCount);\n\tif (result === undefined) {\n\t\t// see https://bugs.webkit.org/show_bug.cgi?id=261140\n\t\tresult = [];\n\t}\n\tinsertInto(array, index, newItems);\n\treturn result;\n}\n\n/**\n * Determine the actual start index (same logic as the native splice() or slice())\n * If greater than the length of the array, start will be set to the length of the array. In this case, no element will be deleted but the method will behave as an adding function, adding as many element as item[n*] provided.\n * If negative, it will begin that many elements from the end of the array. (In this case, the origin -1, meaning -n is the index of the nth last element, and is therefore equivalent to the index of array.length - n.) If array.length + start is less than 0, it will begin from index 0.\n * @param array The target array.\n * @param start The operation index.\n */\nfunction getActualStartIndex<T>(array: T[], start: number): number {\n\treturn start < 0 ? Math.max(start + array.length, 0) : Math.min(start, array.length);\n}\n\n/**\n * When comparing two values,\n * a negative number indicates that the first value is less than the second,\n * a positive number indicates that the first value is greater than the second,\n * and zero indicates that neither is the case.\n*/\nexport type CompareResult = number;\n\nexport namespace CompareResult {\n\texport function isLessThan(result: CompareResult): boolean {\n\t\treturn result < 0;\n\t}\n\n\texport function isLessThanOrEqual(result: CompareResult): boolean {\n\t\treturn result <= 0;\n\t}\n\n\texport function isGreaterThan(result: CompareResult): boolean {\n\t\treturn result > 0;\n\t}\n\n\texport function isNeitherLessOrGreaterThan(result: CompareResult): boolean {\n\t\treturn result === 0;\n\t}\n\n\texport const greaterThan = 1;\n\texport const lessThan = -1;\n\texport const neitherLessOrGreaterThan = 0;\n}\n\n/**\n * A comparator `c` defines a total order `<=` on `T` as following:\n * `c(a, b) <= 0` iff `a` <= `b`.\n * We also have `c(a, b) == 0` iff `c(b, a) == 0`.\n*/\nexport type Comparator<T> = (a: T, b: T) => CompareResult;\n\nexport function compareBy<TItem, TCompareBy>(selector: (item: TItem) => TCompareBy, comparator: Comparator<TCompareBy>): Comparator<TItem> {\n\treturn (a, b) => comparator(selector(a), selector(b));\n}\n\nexport function tieBreakComparators<TItem>(...comparators: Comparator<TItem>[]): Comparator<TItem> {\n\treturn (item1, item2) => {\n\t\tfor (const comparator of comparators) {\n\t\t\tconst result = comparator(item1, item2);\n\t\t\tif (!CompareResult.isNeitherLessOrGreaterThan(result)) {\n\t\t\t\treturn result;\n\t\t\t}\n\t\t}\n\t\treturn CompareResult.neitherLessOrGreaterThan;\n\t};\n}\n\n/**\n * The natural order on numbers.\n*/\nexport const numberComparator: Comparator<number> = (a, b) => a - b;\n\nexport const booleanComparator: Comparator<boolean> = (a, b) => numberComparator(a ? 1 : 0, b ? 1 : 0);\n\nexport function reverseOrder<TItem>(comparator: Comparator<TItem>): Comparator<TItem> {\n\treturn (a, b) => -comparator(a, b);\n}\n\nexport class ArrayQueue<T> {\n\tprivate firstIdx = 0;\n\tprivate lastIdx = this.items.length - 1;\n\n\t/**\n\t * Constructs a queue that is backed by the given array. Runtime is O(1).\n\t*/\n\tconstructor(private readonly items: readonly T[]) { }\n\n\tget length(): number {\n\t\treturn this.lastIdx - this.firstIdx + 1;\n\t}\n\n\t/**\n\t * Consumes elements from the beginning of the queue as long as the predicate returns true.\n\t * If no elements were consumed, `null` is returned. Has a runtime of O(result.length).\n\t*/\n\ttakeWhile(predicate: (value: T) => boolean): T[] | null {\n\t\t// P(k) := k <= this.lastIdx && predicate(this.items[k])\n\t\t// Find s := min { k | k >= this.firstIdx && !P(k) } and return this.data[this.firstIdx...s)\n\n\t\tlet startIdx = this.firstIdx;\n\t\twhile (startIdx < this.items.length && predicate(this.items[startIdx])) {\n\t\t\tstartIdx++;\n\t\t}\n\t\tconst result = startIdx === this.firstIdx ? null : this.items.slice(this.firstIdx, startIdx);\n\t\tthis.firstIdx = startIdx;\n\t\treturn result;\n\t}\n\n\t/**\n\t * Consumes elements from the end of the queue as long as the predicate returns true.\n\t * If no elements were consumed, `null` is returned.\n\t * The result has the same order as the underlying array!\n\t*/\n\ttakeFromEndWhile(predicate: (value: T) => boolean): T[] | null {\n\t\t// P(k) := this.firstIdx >= k && predicate(this.items[k])\n\t\t// Find s := max { k | k <= this.lastIdx && !P(k) } and return this.data(s...this.lastIdx]\n\n\t\tlet endIdx = this.lastIdx;\n\t\twhile (endIdx >= 0 && predicate(this.items[endIdx])) {\n\t\t\tendIdx--;\n\t\t}\n\t\tconst result = endIdx === this.lastIdx ? null : this.items.slice(endIdx + 1, this.lastIdx + 1);\n\t\tthis.lastIdx = endIdx;\n\t\treturn result;\n\t}\n\n\tpeek(): T | undefined {\n\t\tif (this.length === 0) {\n\t\t\treturn undefined;\n\t\t}\n\t\treturn this.items[this.firstIdx];\n\t}\n\n\tpeekLast(): T | undefined {\n\t\tif (this.length === 0) {\n\t\t\treturn undefined;\n\t\t}\n\t\treturn this.items[this.lastIdx];\n\t}\n\n\tdequeue(): T | undefined {\n\t\tconst result = this.items[this.firstIdx];\n\t\tthis.firstIdx++;\n\t\treturn result;\n\t}\n\n\tremoveLast(): T | undefined {\n\t\tconst result = this.items[this.lastIdx];\n\t\tthis.lastIdx--;\n\t\treturn result;\n\t}\n\n\ttakeCount(count: number): T[] {\n\t\tconst result = this.items.slice(this.firstIdx, this.firstIdx + count);\n\t\tthis.firstIdx += count;\n\t\treturn result;\n\t}\n}\n\n/**\n * This class is faster than an iterator and array for lazy computed data.\n*/\nexport class CallbackIterable<T> {\n\tpublic static readonly empty = new CallbackIterable<never>(_callback => { });\n\n\tconstructor(\n\t\t/**\n\t\t * Calls the callback for every item.\n\t\t * Stops when the callback returns false.\n\t\t*/\n\t\tpublic readonly iterate: (callback: (item: T) => boolean) => void\n\t) {\n\t}\n\n\tforEach(handler: (item: T) => void) {\n\t\tthis.iterate(item => { handler(item); return true; });\n\t}\n\n\ttoArray(): T[] {\n\t\tconst result: T[] = [];\n\t\tthis.iterate(item => { result.push(item); return true; });\n\t\treturn result;\n\t}\n\n\tfilter(predicate: (item: T) => boolean): CallbackIterable<T> {\n\t\treturn new CallbackIterable(cb => this.iterate(item => predicate(item) ? cb(item) : true));\n\t}\n\n\tmap<TResult>(mapFn: (item: T) => TResult): CallbackIterable<TResult> {\n\t\treturn new CallbackIterable<TResult>(cb => this.iterate(item => cb(mapFn(item))));\n\t}\n\n\tsome(predicate: (item: T) => boolean): boolean {\n\t\tlet result = false;\n\t\tthis.iterate(item => { result = predicate(item); return !result; });\n\t\treturn result;\n\t}\n\n\tfindFirst(predicate: (item: T) => boolean): T | undefined {\n\t\tlet result: T | undefined;\n\t\tthis.iterate(item => {\n\t\t\tif (predicate(item)) {\n\t\t\t\tresult = item;\n\t\t\t\treturn false;\n\t\t\t}\n\t\t\treturn true;\n\t\t});\n\t\treturn result;\n\t}\n\n\tfindLast(predicate: (item: T) => boolean): T | undefined {\n\t\tlet result: T | undefined;\n\t\tthis.iterate(item => {\n\t\t\tif (predicate(item)) {\n\t\t\t\tresult = item;\n\t\t\t}\n\t\t\treturn true;\n\t\t});\n\t\treturn result;\n\t}\n\n\tfindLastMaxBy(comparator: Comparator<T>): T | undefined {\n\t\tlet result: T | undefined;\n\t\tlet first = true;\n\t\tthis.iterate(item => {\n\t\t\tif (first || CompareResult.isGreaterThan(comparator(item, result!))) {\n\t\t\t\tfirst = false;\n\t\t\t\tresult = item;\n\t\t\t}\n\t\t\treturn true;\n\t\t});\n\t\treturn result;\n\t}\n}\n\n/**\n * Represents a re-arrangement of items in an array.\n */\nexport class Permutation {\n\tconstructor(private readonly _indexMap: readonly number[]) { }\n\n\t/**\n\t * Returns a permutation that sorts the given array according to the given compare function.\n\t */\n\tpublic static createSortPermutation<T>(arr: readonly T[], compareFn: (a: T, b: T) => number): Permutation {\n\t\tconst sortIndices = Array.from(arr.keys()).sort((index1, index2) => compareFn(arr[index1], arr[index2]));\n\t\treturn new Permutation(sortIndices);\n\t}\n\n\t/**\n\t * Returns a new array with the elements of the given array re-arranged according to this permutation.\n\t */\n\tapply<T>(arr: readonly T[]): T[] {\n\t\treturn arr.map((_, index) => arr[this._indexMap[index]]);\n\t}\n\n\t/**\n\t * Returns a new permutation that undoes the re-arrangement of this permutation.\n\t*/\n\tinverse(): Permutation {\n\t\tconst inverseIndexMap = this._indexMap.slice();\n\t\tfor (let i = 0; i < this._indexMap.length; i++) {\n\t\t\tinverseIndexMap[this._indexMap[i]] = i;\n\t\t}\n\t\treturn new Permutation(inverseIndexMap);\n\t}\n}\n", "/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\n/**\n * An interface for a JavaScript object that\n * acts a dictionary. The keys are strings.\n */\nexport type IStringDictionary<V> = Record<string, V>;\n\n/**\n * An interface for a JavaScript object that\n * acts a dictionary. The keys are numbers.\n */\nexport type INumberDictionary<V> = Record<number, V>;\n\n/**\n * Groups the collection into a dictionary based on the provided\n * group function.\n */\nexport function groupBy<K extends string | number | symbol, V>(data: V[], groupFn: (element: V) => K): Record<K, V[]> {\n\tconst result: Record<K, V[]> = Object.create(null);\n\tfor (const element of data) {\n\t\tconst key = groupFn(element);\n\t\tlet target = result[key];\n\t\tif (!target) {\n\t\t\ttarget = result[key] = [];\n\t\t}\n\t\ttarget.push(element);\n\t}\n\treturn result;\n}\n\nexport function diffSets<T>(before: Set<T>, after: Set<T>): { removed: T[]; added: T[] } {\n\tconst removed: T[] = [];\n\tconst added: T[] = [];\n\tfor (const element of before) {\n\t\tif (!after.has(element)) {\n\t\t\tremoved.push(element);\n\t\t}\n\t}\n\tfor (const element of after) {\n\t\tif (!before.has(element)) {\n\t\t\tadded.push(element);\n\t\t}\n\t}\n\treturn { removed, added };\n}\n\nexport function diffMaps<K, V>(before: Map<K, V>, after: Map<K, V>): { removed: V[]; added: V[] } {\n\tconst removed: V[] = [];\n\tconst added: V[] = [];\n\tfor (const [index, value] of before) {\n\t\tif (!after.has(index)) {\n\t\t\tremoved.push(value);\n\t\t}\n\t}\n\tfor (const [index, value] of after) {\n\t\tif (!before.has(index)) {\n\t\t\tadded.push(value);\n\t\t}\n\t}\n\treturn { removed, added };\n}\n\n/**\n * Computes the intersection of two sets.\n *\n * @param setA - The first set.\n * @param setB - The second iterable.\n * @returns A new set containing the elements that are in both `setA` and `setB`.\n */\nexport function intersection<T>(setA: Set<T>, setB: Iterable<T>): Set<T> {\n\tconst result = new Set<T>();\n\tfor (const elem of setB) {\n\t\tif (setA.has(elem)) {\n\t\t\tresult.add(elem);\n\t\t}\n\t}\n\treturn result;\n}\n\nexport class SetWithKey<T> implements Set<T> {\n\tprivate _map = new Map<any, T>();\n\n\tconstructor(values: T[], private toKey: (t: T) => any) {\n\t\tfor (const value of values) {\n\t\t\tthis.add(value);\n\t\t}\n\t}\n\n\tget size(): number {\n\t\treturn this._map.size;\n\t}\n\n\tadd(value: T): this {\n\t\tconst key = this.toKey(value);\n\t\tthis._map.set(key, value);\n\t\treturn this;\n\t}\n\n\tdelete(value: T): boolean {\n\t\treturn this._map.delete(this.toKey(value));\n\t}\n\n\thas(value: T): boolean {\n\t\treturn this._map.has(this.toKey(value));\n\t}\n\n\t*entries(): IterableIterator<[T, T]> {\n\t\tfor (const entry of this._map.values()) {\n\t\t\tyield [entry, entry];\n\t\t}\n\t}\n\n\tkeys(): IterableIterator<T> {\n\t\treturn this.values();\n\t}\n\n\t*values(): IterableIterator<T> {\n\t\tfor (const entry of this._map.values()) {\n\t\t\tyield entry;\n\t\t}\n\t}\n\n\tclear(): void {\n\t\tthis._map.clear();\n\t}\n\n\tforEach(callbackfn: (value: T, value2: T, set: Set<T>) => void, thisArg?: any): void {\n\t\tthis._map.forEach(entry => callbackfn.call(thisArg, entry, entry, this));\n\t}\n\n\t[Symbol.iterator](): IterableIterator<T> {\n\t\treturn this.values();\n\t}\n\n\t[Symbol.toStringTag]: string = 'SetWithKey';\n}\n", "/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\nexport function getOrSet<K, V>(map: Map<K, V>, key: K, value: V): V {\n\tlet result = map.get(key);\n\tif (result === undefined) {\n\t\tresult = value;\n\t\tmap.set(key, result);\n\t}\n\n\treturn result;\n}\n\nexport function mapToString<K, V>(map: Map<K, V>): string {\n\tconst entries: string[] = [];\n\tmap.forEach((value, key) => {\n\t\tentries.push(`${key} => ${value}`);\n\t});\n\n\treturn `Map(${map.size}) {${entries.join(', ')}}`;\n}\n\nexport function setToString<K>(set: Set<K>): string {\n\tconst entries: K[] = [];\n\tset.forEach(value => {\n\t\tentries.push(value);\n\t});\n\n\treturn `Set(${set.size}) {${entries.join(', ')}}`;\n}\n\nexport const enum Touch {\n\tNone = 0,\n\tAsOld = 1,\n\tAsNew = 2\n}\n\nexport class CounterSet<T> {\n\n\tprivate map = new Map<T, number>();\n\n\tadd(value: T): CounterSet<T> {\n\t\tthis.map.set(value, (this.map.get(value) || 0) + 1);\n\t\treturn this;\n\t}\n\n\tdelete(value: T): boolean {\n\t\tlet counter = this.map.get(value) || 0;\n\n\t\tif (counter === 0) {\n\t\t\treturn false;\n\t\t}\n\n\t\tcounter--;\n\n\t\tif (counter === 0) {\n\t\t\tthis.map.delete(value);\n\t\t} else {\n\t\t\tthis.map.set(value, counter);\n\t\t}\n\n\t\treturn true;\n\t}\n\n\thas(value: T): boolean {\n\t\treturn this.map.has(value);\n\t}\n}\n\n/**\n * A map that allows access both by keys and values.\n * **NOTE**: values need to be unique.\n */\nexport class BidirectionalMap<K, V> {\n\n\tprivate readonly _m1 = new Map<K, V>();\n\tprivate readonly _m2 = new Map<V, K>();\n\n\tconstructor(entries?: readonly (readonly [K, V])[]) {\n\t\tif (entries) {\n\t\t\tfor (const [key, value] of entries) {\n\t\t\t\tthis.set(key, value);\n\t\t\t}\n\t\t}\n\t}\n\n\tclear(): void {\n\t\tthis._m1.clear();\n\t\tthis._m2.clear();\n\t}\n\n\tset(key: K, value: V): void {\n\t\tthis._m1.set(key, value);\n\t\tthis._m2.set(value, key);\n\t}\n\n\tget(key: K): V | undefined {\n\t\treturn this._m1.get(key);\n\t}\n\n\tgetKey(value: V): K | undefined {\n\t\treturn this._m2.get(value);\n\t}\n\n\tdelete(key: K): boolean {\n\t\tconst value = this._m1.get(key);\n\t\tif (value === undefined) {\n\t\t\treturn false;\n\t\t}\n\t\tthis._m1.delete(key);\n\t\tthis._m2.delete(value);\n\t\treturn true;\n\t}\n\n\tforEach(callbackfn: (value: V, key: K, map: BidirectionalMap<K, V>) => void, thisArg?: any): void {\n\t\tthis._m1.forEach((value, key) => {\n\t\t\tcallbackfn.call(thisArg, value, key, this);\n\t\t});\n\t}\n\n\tkeys(): IterableIterator<K> {\n\t\treturn this._m1.keys();\n\t}\n\n\tvalues(): IterableIterator<V> {\n\t\treturn this._m1.values();\n\t}\n}\n\nexport class SetMap<K, V> {\n\n\tprivate map = new Map<K, Set<V>>();\n\n\tadd(key: K, value: V): void {\n\t\tlet values = this.map.get(key);\n\n\t\tif (!values) {\n\t\t\tvalues = new Set<V>();\n\t\t\tthis.map.set(key, values);\n\t\t}\n\n\t\tvalues.add(value);\n\t}\n\n\tdelete(key: K, value: V): void {\n\t\tconst values = this.map.get(key);\n\n\t\tif (!values) {\n\t\t\treturn;\n\t\t}\n\n\t\tvalues.delete(value);\n\n\t\tif (values.size === 0) {\n\t\t\tthis.map.delete(key);\n\t\t}\n\t}\n\n\tforEach(key: K, fn: (value: V) => void): void {\n\t\tconst values = this.map.get(key);\n\n\t\tif (!values) {\n\t\t\treturn;\n\t\t}\n\n\t\tvalues.forEach(fn);\n\t}\n\n\tget(key: K): ReadonlySet<V> {\n\t\tconst values = this.map.get(key);\n\t\tif (!values) {\n\t\t\treturn new Set<V>();\n\t\t}\n\t\treturn values;\n\t}\n}\n\nexport function mapsStrictEqualIgnoreOrder(a: Map<unknown, unknown>, b: Map<unknown, unknown>): boolean {\n\tif (a === b) {\n\t\treturn true;\n\t}\n\n\tif (a.size !== b.size) {\n\t\treturn false;\n\t}\n\n\tfor (const [key, value] of a) {\n\t\tif (!b.has(key) || b.get(key) !== value) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\tfor (const [key] of b) {\n\t\tif (!a.has(key)) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\treturn true;\n}\n", "/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\n/**\n * Given a function, returns a function that is only calling that function once.\n */\nexport function createSingleCallFunction<T extends Function>(this: unknown, fn: T, fnDidRunCallback?: () => void): T {\n\tconst _this = this;\n\tlet didCall = false;\n\tlet result: unknown;\n\n\treturn function () {\n\t\tif (didCall) {\n\t\t\treturn result;\n\t\t}\n\n\t\tdidCall = true;\n\t\tif (fnDidRunCallback) {\n\t\t\ttry {\n\t\t\t\tresult = fn.apply(_this, arguments);\n\t\t\t} finally {\n\t\t\t\tfnDidRunCallback();\n\t\t\t}\n\t\t} else {\n\t\t\tresult = fn.apply(_this, arguments);\n\t\t}\n\n\t\treturn result;\n\t} as unknown as T;\n}\n", "/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\nexport namespace Iterable {\n\n\texport function is<T = any>(thing: any): thing is Iterable<T> {\n\t\treturn thing && typeof thing === 'object' && typeof thing[Symbol.iterator] === 'function';\n\t}\n\n\tconst _empty: Iterable<any> = Object.freeze([]);\n\texport function empty<T = any>(): Iterable<T> {\n\t\treturn _empty;\n\t}\n\n\texport function* single<T>(element: T): Iterable<T> {\n\t\tyield element;\n\t}\n\n\texport function wrap<T>(iterableOrElement: Iterable<T> | T): Iterable<T> {\n\t\tif (is(iterableOrElement)) {\n\t\t\treturn iterableOrElement;\n\t\t} else {\n\t\t\treturn single(iterableOrElement);\n\t\t}\n\t}\n\n\texport function from<T>(iterable: Iterable<T> | undefined | null): Iterable<T> {\n\t\treturn iterable || _empty;\n\t}\n\n\texport function* reverse<T>(array: Array<T>): Iterable<T> {\n\t\tfor (let i = array.length - 1; i >= 0; i--) {\n\t\t\tyield array[i];\n\t\t}\n\t}\n\n\texport function isEmpty<T>(iterable: Iterable<T> | undefined | null): boolean {\n\t\treturn !iterable || iterable[Symbol.iterator]().next().done === true;\n\t}\n\n\texport function first<T>(iterable: Iterable<T>): T | undefined {\n\t\treturn iterable[Symbol.iterator]().next().value;\n\t}\n\n\texport function some<T>(iterable: Iterable<T>, predicate: (t: T, i: number) => unknown): boolean {\n\t\tlet i = 0;\n\t\tfor (const element of iterable) {\n\t\t\tif (predicate(element, i++)) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t}\n\t\treturn false;\n\t}\n\n\texport function find<T, R extends T>(iterable: Iterable<T>, predicate: (t: T) => t is R): R | undefined;\n\texport function find<T>(iterable: Iterable<T>, predicate: (t: T) => boolean): T | undefined;\n\texport function find<T>(iterable: Iterable<T>, predicate: (t: T) => boolean): T | undefined {\n\t\tfor (const element of iterable) {\n\t\t\tif (predicate(element)) {\n\t\t\t\treturn element;\n\t\t\t}\n\t\t}\n\n\t\treturn undefined;\n\t}\n\n\texport function filter<T, R extends T>(iterable: Iterable<T>, predicate: (t: T) => t is R): Iterable<R>;\n\texport function filter<T>(iterable: Iterable<T>, predicate: (t: T) => boolean): Iterable<T>;\n\texport function* filter<T>(iterable: Iterable<T>, predicate: (t: T) => boolean): Iterable<T> {\n\t\tfor (const element of iterable) {\n\t\t\tif (predicate(element)) {\n\t\t\t\tyield element;\n\t\t\t}\n\t\t}\n\t}\n\n\texport function* map<T, R>(iterable: Iterable<T>, fn: (t: T, index: number) => R): Iterable<R> {\n\t\tlet index = 0;\n\t\tfor (const element of iterable) {\n\t\t\tyield fn(element, index++);\n\t\t}\n\t}\n\n\texport function* flatMap<T, R>(iterable: Iterable<T>, fn: (t: T, index: number) => Iterable<R>): Iterable<R> {\n\t\tlet index = 0;\n\t\tfor (const element of iterable) {\n\t\t\tyield* fn(element, index++);\n\t\t}\n\t}\n\n\texport function* concat<T>(...iterables: Iterable<T>[]): Iterable<T> {\n\t\tfor (const iterable of iterables) {\n\t\t\tyield* iterable;\n\t\t}\n\t}\n\n\texport function reduce<T, R>(iterable: Iterable<T>, reducer: (previousValue: R, currentValue: T) => R, initialValue: R): R {\n\t\tlet value = initialValue;\n\t\tfor (const element of iterable) {\n\t\t\tvalue = reducer(value, element);\n\t\t}\n\t\treturn value;\n\t}\n\n\t/**\n\t * Returns an iterable slice of the array, with the same semantics as `array.slice()`.\n\t */\n\texport function* slice<T>(arr: ReadonlyArray<T>, from: number, to = arr.length): Iterable<T> {\n\t\tif (from < 0) {\n\t\t\tfrom += arr.length;\n\t\t}\n\n\t\tif (to < 0) {\n\t\t\tto += arr.length;\n\t\t} else if (to > arr.length) {\n\t\t\tto = arr.length;\n\t\t}\n\n\t\tfor (; from < to; from++) {\n\t\t\tyield arr[from];\n\t\t}\n\t}\n\n\t/**\n\t * Consumes `atMost` elements from iterable and returns the consumed elements,\n\t * and an iterable for the rest of the elements.\n\t */\n\texport function consume<T>(iterable: Iterable<T>, atMost: number = Number.POSITIVE_INFINITY): [T[], Iterable<T>] {\n\t\tconst consumed: T[] = [];\n\n\t\tif (atMost === 0) {\n\t\t\treturn [consumed, iterable];\n\t\t}\n\n\t\tconst iterator = iterable[Symbol.iterator]();\n\n\t\tfor (let i = 0; i < atMost; i++) {\n\t\t\tconst next = iterator.next();\n\n\t\t\tif (next.done) {\n\t\t\t\treturn [consumed, Iterable.empty()];\n\t\t\t}\n\n\t\t\tconsumed.push(next.value);\n\t\t}\n\n\t\treturn [consumed, { [Symbol.iterator]() { return iterator; } }];\n\t}\n\n\texport async function asyncToArray<T>(iterable: AsyncIterable<T>): Promise<T[]> {\n\t\tconst result: T[] = [];\n\t\tfor await (const item of iterable) {\n\t\t\tresult.push(item);\n\t\t}\n\t\treturn Promise.resolve(result);\n\t}\n}\n", "/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\nimport { compareBy, numberComparator } from 'vs/base/common/arrays';\nimport { groupBy } from 'vs/base/common/collections';\nimport { SetMap } from './map';\nimport { createSingleCallFunction } from 'vs/base/common/functional';\nimport { Iterable } from 'vs/base/common/iterator';\n\n// #region Disposable Tracking\n\n/**\n * Enables logging of potentially leaked disposables.\n *\n * A disposable is considered leaked if it is not disposed or not registered as the child of\n * another disposable. This tracking is very simple an only works for classes that either\n * extend Disposable or use a DisposableStore. This means there are a lot of false positives.\n */\nconst TRACK_DISPOSABLES = false;\nlet disposableTracker: IDisposableTracker | null = null;\n\nexport interface IDisposableTracker {\n\t/**\n\t * Is called on construction of a disposable.\n\t*/\n\ttrackDisposable(disposable: IDisposable): void;\n\n\t/**\n\t * Is called when a disposable is registered as child of another disposable (e.g. {@link DisposableStore}).\n\t * If parent is `null`, the disposable is removed from its former parent.\n\t*/\n\tsetParent(child: IDisposable, parent: IDisposable | null): void;\n\n\t/**\n\t * Is called after a disposable is disposed.\n\t*/\n\tmarkAsDisposed(disposable: IDisposable): void;\n\n\t/**\n\t * Indicates that the given object is a singleton which does not need to be disposed.\n\t*/\n\tmarkAsSingleton(disposable: IDisposable): void;\n}\n\nexport interface DisposableInfo {\n\tvalue: IDisposable;\n\tsource: string | null;\n\tparent: IDisposable | null;\n\tisSingleton: boolean;\n\tidx: number;\n}\n\nexport class DisposableTracker implements IDisposableTracker {\n\tprivate static idx = 0;\n\n\tprivate readonly livingDisposables = new Map<IDisposable, DisposableInfo>();\n\n\tprivate getDisposableData(d: IDisposable): DisposableInfo {\n\t\tlet val = this.livingDisposables.get(d);\n\t\tif (!val) {\n\t\t\tval = { parent: null, source: null, isSingleton: false, value: d, idx: DisposableTracker.idx++ };\n\t\t\tthis.livingDisposables.set(d, val);\n\t\t}\n\t\treturn val;\n\t}\n\n\ttrackDisposable(d: IDisposable): void {\n\t\tconst data = this.getDisposableData(d);\n\t\tif (!data.source) {\n\t\t\tdata.source =\n\t\t\t\tnew Error().stack!;\n\t\t}\n\t}\n\n\tsetParent(child: IDisposable, parent: IDisposable | null): void {\n\t\tconst data = this.getDisposableData(child);\n\t\tdata.parent = parent;\n\t}\n\n\tmarkAsDisposed(x: IDisposable): void {\n\t\tthis.livingDisposables.delete(x);\n\t}\n\n\tmarkAsSingleton(disposable: IDisposable): void {\n\t\tthis.getDisposableData(disposable).isSingleton = true;\n\t}\n\n\tprivate getRootParent(data: DisposableInfo, cache: Map<DisposableInfo, DisposableInfo>): DisposableInfo {\n\t\tconst cacheValue = cache.get(data);\n\t\tif (cacheValue) {\n\t\t\treturn cacheValue;\n\t\t}\n\n\t\tconst result = data.parent ? this.getRootParent(this.getDisposableData(data.parent), cache) : data;\n\t\tcache.set(data, result);\n\t\treturn result;\n\t}\n\n\tgetTrackedDisposables(): IDisposable[] {\n\t\tconst rootParentCache = new Map<DisposableInfo, DisposableInfo>();\n\n\t\tconst leaking = [...this.livingDisposables.entries()]\n\t\t\t.filter(([, v]) => v.source !== null && !this.getRootParent(v, rootParentCache).isSingleton)\n\t\t\t.flatMap(([k]) => k);\n\n\t\treturn leaking;\n\t}\n\n\tcomputeLeakingDisposables(maxReported = 10, preComputedLeaks?: DisposableInfo[]): { leaks: DisposableInfo[]; details: string } | undefined {\n\t\tlet uncoveredLeakingObjs: DisposableInfo[] | undefined;\n\t\tif (preComputedLeaks) {\n\t\t\tuncoveredLeakingObjs = preComputedLeaks;\n\t\t} else {\n\t\t\tconst rootParentCache = new Map<DisposableInfo, DisposableInfo>();\n\n\t\t\tconst leakingObjects = [...this.livingDisposables.values()]\n\t\t\t\t.filter((info) => info.source !== null && !this.getRootParent(info, rootParentCache).isSingleton);\n\n\t\t\tif (leakingObjects.length === 0) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t\tconst leakingObjsSet = new Set(leakingObjects.map(o => o.value));\n\n\t\t\t// Remove all objects that are a child of other leaking objects. Assumes there are no cycles.\n\t\t\tuncoveredLeakingObjs = leakingObjects.filter(l => {\n\t\t\t\treturn !(l.parent && leakingObjsSet.has(l.parent));\n\t\t\t});\n\n\t\t\tif (uncoveredLeakingObjs.length === 0) {\n\t\t\t\tthrow new Error('There are cyclic diposable chains!');\n\t\t\t}\n\t\t}\n\n\t\tif (!uncoveredLeakingObjs) {\n\t\t\treturn undefined;\n\t\t}\n\n\t\tfunction getStackTracePath(leaking: DisposableInfo): string[] {\n\t\t\tfunction removePrefix(array: string[], linesToRemove: (string | RegExp)[]) {\n\t\t\t\twhile (array.length > 0 && linesToRemove.some(regexp => typeof regexp === 'string' ? regexp === array[0] : array[0].match(regexp))) {\n\t\t\t\t\tarray.shift();\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tconst lines = leaking.source!.split('\\n').map(p => p.trim().replace('at ', '')).filter(l => l !== '');\n\t\t\tremovePrefix(lines, ['Error', /^trackDisposable \\(.*\\)$/, /^DisposableTracker.trackDisposable \\(.*\\)$/]);\n\t\t\treturn lines.reverse();\n\t\t}\n\n\t\tconst stackTraceStarts = new SetMap<string, DisposableInfo>();\n\t\tfor (const leaking of uncoveredLeakingObjs) {\n\t\t\tconst stackTracePath = getStackTracePath(leaking);\n\t\t\tfor (let i = 0; i <= stackTracePath.length; i++) {\n\t\t\t\tstackTraceStarts.add(stackTracePath.slice(0, i).join('\\n'), leaking);\n\t\t\t}\n\t\t}\n\n\t\t// Put earlier leaks first\n\t\tuncoveredLeakingObjs.sort(compareBy(l => l.idx, numberComparator));\n\n\t\tlet message = '';\n\n\t\tlet i = 0;\n\t\tfor (const leaking of uncoveredLeakingObjs.slice(0, maxReported)) {\n\t\t\ti++;\n\t\t\tconst stackTracePath = getStackTracePath(leaking);\n\t\t\tconst stackTraceFormattedLines = [];\n\n\t\t\tfor (let i = 0; i < stackTracePath.length; i++) {\n\t\t\t\tlet line = stackTracePath[i];\n\t\t\t\tconst starts = stackTraceStarts.get(stackTracePath.slice(0, i + 1).join('\\n'));\n\t\t\t\tline = `(shared with ${starts.size}/${uncoveredLeakingObjs.length} leaks) at ${line}`;\n\n\t\t\t\tconst prevStarts = stackTraceStarts.get(stackTracePath.slice(0, i).join('\\n'));\n\t\t\t\tconst continuations = groupBy([...prevStarts].map(d => getStackTracePath(d)[i]), v => v);\n\t\t\t\tdelete continuations[stackTracePath[i]];\n\t\t\t\tfor (const [cont, set] of Object.entries(continuations)) {\n\t\t\t\t\tstackTraceFormattedLines.unshift(`    - stacktraces of ${set.length} other leaks continue with ${cont}`);\n\t\t\t\t}\n\n\t\t\t\tstackTraceFormattedLines.unshift(line);\n\t\t\t}\n\n\t\t\tmessage += `\\n\\n\\n==================== Leaking disposable ${i}/${uncoveredLeakingObjs.length}: ${leaking.value.constructor.name} ====================\\n${stackTraceFormattedLines.join('\\n')}\\n============================================================\\n\\n`;\n\t\t}\n\n\t\tif (uncoveredLeakingObjs.length > maxReported) {\n\t\t\tmessage += `\\n\\n\\n... and ${uncoveredLeakingObjs.length - maxReported} more leaking disposables\\n\\n`;\n\t\t}\n\n\t\treturn { leaks: uncoveredLeakingObjs, details: message };\n\t}\n}\n\nexport function setDisposableTracker(tracker: IDisposableTracker | null): void {\n\tdisposableTracker = tracker;\n}\n\nif (TRACK_DISPOSABLES) {\n\tconst __is_disposable_tracked__ = '__is_disposable_tracked__';\n\tsetDisposableTracker(new class implements IDisposableTracker {\n\t\ttrackDisposable(x: IDisposable): void {\n\t\t\tconst stack = new Error('Potentially leaked disposable').stack!;\n\t\t\tsetTimeout(() => {\n\t\t\t\tif (!(x as any)[__is_disposable_tracked__]) {\n\t\t\t\t\tconsole.log(stack);\n\t\t\t\t}\n\t\t\t}, 3000);\n\t\t}\n\n\t\tsetParent(child: IDisposable, parent: IDisposable | null): void {\n\t\t\tif (child && child !== Disposable.None) {\n\t\t\t\ttry {\n\t\t\t\t\t(child as any)[__is_disposable_tracked__] = true;\n\t\t\t\t} catch {\n\t\t\t\t\t// noop\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tmarkAsDisposed(disposable: IDisposable): void {\n\t\t\tif (disposable && disposable !== Disposable.None) {\n\t\t\t\ttry {\n\t\t\t\t\t(disposable as any)[__is_disposable_tracked__] = true;\n\t\t\t\t} catch {\n\t\t\t\t\t// noop\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tmarkAsSingleton(disposable: IDisposable): void { }\n\t});\n}\n\nexport function trackDisposable<T extends IDisposable>(x: T): T {\n\tdisposableTracker?.trackDisposable(x);\n\treturn x;\n}\n\nexport function markAsDisposed(disposable: IDisposable): void {\n\tdisposableTracker?.markAsDisposed(disposable);\n}\n\nfunction setParentOfDisposable(child: IDisposable, parent: IDisposable | null): void {\n\tdisposableTracker?.setParent(child, parent);\n}\n\nfunction setParentOfDisposables(children: IDisposable[], parent: IDisposable | null): void {\n\tif (!disposableTracker) {\n\t\treturn;\n\t}\n\tfor (const child of children) {\n\t\tdisposableTracker.setParent(child, parent);\n\t}\n}\n\n/**\n * Indicates that the given object is a singleton which does not need to be disposed.\n*/\nexport function markAsSingleton<T extends IDisposable>(singleton: T): T {\n\tdisposableTracker?.markAsSingleton(singleton);\n\treturn singleton;\n}\n\n// #endregion\n\n/**\n * An object that performs a cleanup operation when `.dispose()` is called.\n *\n * Some examples of how disposables are used:\n *\n * - An event listener that removes itself when `.dispose()` is called.\n * - A resource such as a file system watcher that cleans up the resource when `.dispose()` is called.\n * - The return value from registering a provider. When `.dispose()` is called, the provider is unregistered.\n */\nexport interface IDisposable {\n\tdispose(): void;\n}\n\n/**\n * Check if `thing` is {@link IDisposable disposable}.\n */\nexport function isDisposable<E extends any>(thing: E): thing is E & IDisposable {\n\treturn typeof thing === 'object' && thing !== null && typeof (<IDisposable><any>thing).dispose === 'function' && (<IDisposable><any>thing).dispose.length === 0;\n}\n\n/**\n * Disposes of the value(s) passed in.\n */\nexport function dispose<T extends IDisposable>(disposable: T): T;\nexport function dispose<T extends IDisposable>(disposable: T | undefined): T | undefined;\nexport function dispose<T extends IDisposable, A extends Iterable<T> = Iterable<T>>(disposables: A): A;\nexport function dispose<T extends IDisposable>(disposables: Array<T>): Array<T>;\nexport function dispose<T extends IDisposable>(disposables: ReadonlyArray<T>): ReadonlyArray<T>;\nexport function dispose<T extends IDisposable>(arg: T | Iterable<T> | undefined): any {\n\tif (Iterable.is(arg)) {\n\t\tconst errors: any[] = [];\n\n\t\tfor (const d of arg) {\n\t\t\tif (d) {\n\t\t\t\ttry {\n\t\t\t\t\td.dispose();\n\t\t\t\t} catch (e) {\n\t\t\t\t\terrors.push(e);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif (errors.length === 1) {\n\t\t\tthrow errors[0];\n\t\t} else if (errors.length > 1) {\n\t\t\tthrow new AggregateError(errors, 'Encountered errors while disposing of store');\n\t\t}\n\n\t\treturn Array.isArray(arg) ? [] : arg;\n\t} else if (arg) {\n\t\targ.dispose();\n\t\treturn arg;\n\t}\n}\n\nexport function disposeIfDisposable<T extends IDisposable | object>(disposables: Array<T>): Array<T> {\n\tfor (const d of disposables) {\n\t\tif (isDisposable(d)) {\n\t\t\td.dispose();\n\t\t}\n\t}\n\treturn [];\n}\n\n/**\n * Combine multiple disposable values into a single {@link IDisposable}.\n */\nexport function combinedDisposable(...disposables: IDisposable[]): IDisposable {\n\tconst parent = toDisposable(() => dispose(disposables));\n\tsetParentOfDisposables(disposables, parent);\n\treturn parent;\n}\n\n/**\n * Turn a function that implements dispose into an {@link IDisposable}.\n *\n * @param fn Clean up function, guaranteed to be called only **once**.\n */\nexport function toDisposable(fn: () => void): IDisposable {\n\tconst self = trackDisposable({\n\t\tdispose: createSingleCallFunction(() => {\n\t\t\tmarkAsDisposed(self);\n\t\t\tfn();\n\t\t})\n\t});\n\treturn self;\n}\n\n/**\n * Manages a collection of disposable values.\n *\n * This is the preferred way to manage multiple disposables. A `DisposableStore` is safer to work with than an\n * `IDisposable[]` as it considers edge cases, such as registering the same value multiple times or adding an item to a\n * store that has already been disposed of.\n */\nexport class DisposableStore implements IDisposable {\n\n\tstatic DISABLE_DISPOSED_WARNING = false;\n\n\tprivate readonly _toDispose = new Set<IDisposable>();\n\tprivate _isDisposed = false;\n\n\tconstructor() {\n\t\ttrackDisposable(this);\n\t}\n\n\t/**\n\t * Dispose of all registered disposables and mark this object as disposed.\n\t *\n\t * Any future disposables added to this object will be disposed of on `add`.\n\t */\n\tpublic dispose(): void {\n\t\tif (this._isDisposed) {\n\t\t\treturn;\n\t\t}\n\n\t\tmarkAsDisposed(this);\n\t\tthis._isDisposed = true;\n\t\tthis.clear();\n\t}\n\n\t/**\n\t * @return `true` if this object has been disposed of.\n\t */\n\tpublic get isDisposed(): boolean {\n\t\treturn this._isDisposed;\n\t}\n\n\t/**\n\t * Dispose of all registered disposables but do not mark this object as disposed.\n\t */\n\tpublic clear(): void {\n\t\tif (this._toDispose.size === 0) {\n\t\t\treturn;\n\t\t}\n\n\t\ttry {\n\t\t\tdispose(this._toDispose);\n\t\t} finally {\n\t\t\tthis._toDispose.clear();\n\t\t}\n\t}\n\n\t/**\n\t * Add a new {@link IDisposable disposable} to the collection.\n\t */\n\tpublic add<T extends IDisposable>(o: T): T {\n\t\tif (!o) {\n\t\t\treturn o;\n\t\t}\n\t\tif ((o as unknown as DisposableStore) === this) {\n\t\t\tthrow new Error('Cannot register a disposable on itself!');\n\t\t}\n\n\t\tsetParentOfDisposable(o, this);\n\t\tif (this._isDisposed) {\n\t\t\tif (!DisposableStore.DISABLE_DISPOSED_WARNING) {\n\t\t\t\tconsole.warn(new Error('Trying to add a disposable to a DisposableStore that has already been disposed of. The added object will be leaked!').stack);\n\t\t\t}\n\t\t} else {\n\t\t\tthis._toDispose.add(o);\n\t\t}\n\n\t\treturn o;\n\t}\n\n\t/**\n\t * Deletes a disposable from store and disposes of it. This will not throw or warn and proceed to dispose the\n\t * disposable even when the disposable is not part in the store.\n\t */\n\tpublic delete<T extends IDisposable>(o: T): void {\n\t\tif (!o) {\n\t\t\treturn;\n\t\t}\n\t\tif ((o as unknown as DisposableStore) === this) {\n\t\t\tthrow new Error('Cannot dispose a disposable on itself!');\n\t\t}\n\t\tthis._toDispose.delete(o);\n\t\to.dispose();\n\t}\n\n\t/**\n\t * Deletes the value from the store, but does not dispose it.\n\t */\n\tpublic deleteAndLeak<T extends IDisposable>(o: T): void {\n\t\tif (!o) {\n\t\t\treturn;\n\t\t}\n\t\tif (this._toDispose.has(o)) {\n\t\t\tthis._toDispose.delete(o);\n\t\t\tsetParentOfDisposable(o, null);\n\t\t}\n\t}\n}\n\n/**\n * Abstract base class for a {@link IDisposable disposable} object.\n *\n * Subclasses can {@linkcode _register} disposables that will be automatically cleaned up when this object is disposed of.\n */\nexport abstract class Disposable implements IDisposable {\n\n\t/**\n\t * A disposable that does nothing when it is disposed of.\n\t *\n\t * TODO: This should not be a static property.\n\t */\n\tstatic readonly None = Object.freeze<IDisposable>({ dispose() { } });\n\n\tprotected readonly _store = new DisposableStore();\n\n\tconstructor() {\n\t\ttrackDisposable(this);\n\t\tsetParentOfDisposable(this._store, this);\n\t}\n\n\tpublic dispose(): void {\n\t\tmarkAsDisposed(this);\n\n\t\tthis._store.dispose();\n\t}\n\n\t/**\n\t * Adds `o` to the collection of disposables managed by this object.\n\t */\n\tprotected _register<T extends IDisposable>(o: T): T {\n\t\tif ((o as unknown as Disposable) === this) {\n\t\t\tthrow new Error('Cannot register a disposable on itself!');\n\t\t}\n\t\treturn this._store.add(o);\n\t}\n}\n\n/**\n * Manages the lifecycle of a disposable value that may be changed.\n *\n * This ensures that when the disposable value is changed, the previously held disposable is disposed of. You can\n * also register a `MutableDisposable` on a `Disposable` to ensure it is automatically cleaned up.\n */\nexport class MutableDisposable<T extends IDisposable> implements IDisposable {\n\tprivate _value?: T;\n\tprivate _isDisposed = false;\n\n\tconstructor() {\n\t\ttrackDisposable(this);\n\t}\n\n\tget value(): T | undefined {\n\t\treturn this._isDisposed ? undefined : this._value;\n\t}\n\n\tset value(value: T | undefined) {\n\t\tif (this._isDisposed || value === this._value) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis._value?.dispose();\n\t\tif (value) {\n\t\t\tsetParentOfDisposable(value, this);\n\t\t}\n\t\tthis._value = value;\n\t}\n\n\t/**\n\t * Resets the stored value and disposed of the previously stored value.\n\t */\n\tclear(): void {\n\t\tthis.value = undefined;\n\t}\n\n\tdispose(): void {\n\t\tthis._isDisposed = true;\n\t\tmarkAsDisposed(this);\n\t\tthis._value?.dispose();\n\t\tthis._value = undefined;\n\t}\n\n\t/**\n\t * Clears the value, but does not dispose it.\n\t * The old value is returned.\n\t*/\n\tclearAndLeak(): T | undefined {\n\t\tconst oldValue = this._value;\n\t\tthis._value = undefined;\n\t\tif (oldValue) {\n\t\t\tsetParentOfDisposable(oldValue, null);\n\t\t}\n\t\treturn oldValue;\n\t}\n}\n\n/**\n * Manages the lifecycle of a disposable value that may be changed like {@link MutableDisposable}, but the value must\n * exist and cannot be undefined.\n */\nexport class MandatoryMutableDisposable<T extends IDisposable> implements IDisposable {\n\tprivate readonly _disposable = new MutableDisposable<T>();\n\tprivate _isDisposed = false;\n\n\tconstructor(initialValue: T) {\n\t\tthis._disposable.value = initialValue;\n\t}\n\n\tget value(): T {\n\t\treturn this._disposable.value!;\n\t}\n\n\tset value(value: T) {\n\t\tif (this._isDisposed || value === this._disposable.value) {\n\t\t\treturn;\n\t\t}\n\t\tthis._disposable.value = value;\n\t}\n\n\tdispose() {\n\t\tthis._isDisposed = true;\n\t\tthis._disposable.dispose();\n\t}\n}\n\nexport class RefCountedDisposable {\n\n\tprivate _counter: number = 1;\n\n\tconstructor(\n\t\tprivate readonly _disposable: IDisposable,\n\t) { }\n\n\tacquire() {\n\t\tthis._counter++;\n\t\treturn this;\n\t}\n\n\trelease() {\n\t\tif (--this._counter === 0) {\n\t\t\tthis._disposable.dispose();\n\t\t}\n\t\treturn this;\n\t}\n}\n\n/**\n * A safe disposable can be `unset` so that a leaked reference (listener)\n * can be cut-off.\n */\nexport class SafeDisposable implements IDisposable {\n\n\tdispose: () => void = () => { };\n\tunset: () => void = () => { };\n\tisset: () => boolean = () => false;\n\n\tconstructor() {\n\t\ttrackDisposable(this);\n\t}\n\n\tset(fn: Function) {\n\t\tlet callback: Function | undefined = fn;\n\t\tthis.unset = () => callback = undefined;\n\t\tthis.isset = () => callback !== undefined;\n\t\tthis.dispose = () => {\n\t\t\tif (callback) {\n\t\t\t\tcallback();\n\t\t\t\tcallback = undefined;\n\t\t\t\tmarkAsDisposed(this);\n\t\t\t}\n\t\t};\n\t\treturn this;\n\t}\n}\n\nexport interface IReference<T> extends IDisposable {\n\treadonly object: T;\n}\n\nexport abstract class ReferenceCollection<T> {\n\n\tprivate readonly references: Map<string, { readonly object: T; counter: number }> = new Map();\n\n\tacquire(key: string, ...args: any[]): IReference<T> {\n\t\tlet reference = this.references.get(key);\n\n\t\tif (!reference) {\n\t\t\treference = { counter: 0, object: this.createReferencedObject(key, ...args) };\n\t\t\tthis.references.set(key, reference);\n\t\t}\n\n\t\tconst { object } = reference;\n\t\tconst dispose = createSingleCallFunction(() => {\n\t\t\tif (--reference.counter === 0) {\n\t\t\t\tthis.destroyReferencedObject(key, reference.object);\n\t\t\t\tthis.references.delete(key);\n\t\t\t}\n\t\t});\n\n\t\treference.counter++;\n\n\t\treturn { object, dispose };\n\t}\n\n\tprotected abstract createReferencedObject(key: string, ...args: any[]): T;\n\tprotected abstract destroyReferencedObject(key: string, object: T): void;\n}\n\n/**\n * Unwraps a reference collection of promised values. Makes sure\n * references are disposed whenever promises get rejected.\n */\nexport class AsyncReferenceCollection<T> {\n\n\tconstructor(private referenceCollection: ReferenceCollection<Promise<T>>) { }\n\n\tasync acquire(key: string, ...args: any[]): Promise<IReference<T>> {\n\t\tconst ref = this.referenceCollection.acquire(key, ...args);\n\n\t\ttry {\n\t\t\tconst object = await ref.object;\n\n\t\t\treturn {\n\t\t\t\tobject,\n\t\t\t\tdispose: () => ref.dispose()\n\t\t\t};\n\t\t} catch (error) {\n\t\t\tref.dispose();\n\t\t\tthrow error;\n\t\t}\n\t}\n}\n\nexport class ImmortalReference<T> implements IReference<T> {\n\tconstructor(public object: T) { }\n\tdispose(): void { /* noop */ }\n}\n\nexport function disposeOnReturn(fn: (store: DisposableStore) => void): void {\n\tconst store = new DisposableStore();\n\ttry {\n\t\tfn(store);\n\t} finally {\n\t\tstore.dispose();\n\t}\n}\n\n/**\n * A map the manages the lifecycle of the values that it stores.\n */\nexport class DisposableMap<K, V extends IDisposable = IDisposable> implements IDisposable {\n\n\tprivate readonly _store = new Map<K, V>();\n\tprivate _isDisposed = false;\n\n\tconstructor() {\n\t\ttrackDisposable(this);\n\t}\n\n\t/**\n\t * Disposes of all stored values and mark this object as disposed.\n\t *\n\t * Trying to use this object after it has been disposed of is an error.\n\t */\n\tdispose(): void {\n\t\tmarkAsDisposed(this);\n\t\tthis._isDisposed = true;\n\t\tthis.clearAndDisposeAll();\n\t}\n\n\t/**\n\t * Disposes of all stored values and clear the map, but DO NOT mark this object as disposed.\n\t */\n\tclearAndDisposeAll(): void {\n\t\tif (!this._store.size) {\n\t\t\treturn;\n\t\t}\n\n\t\ttry {\n\t\t\tdispose(this._store.values());\n\t\t} finally {\n\t\t\tthis._store.clear();\n\t\t}\n\t}\n\n\thas(key: K): boolean {\n\t\treturn this._store.has(key);\n\t}\n\n\tget size(): number {\n\t\treturn this._store.size;\n\t}\n\n\tget(key: K): V | undefined {\n\t\treturn this._store.get(key);\n\t}\n\n\tset(key: K, value: V, skipDisposeOnOverwrite = false): void {\n\t\tif (this._isDisposed) {\n\t\t\tconsole.warn(new Error('Trying to add a disposable to a DisposableMap that has already been disposed of. The added object will be leaked!').stack);\n\t\t}\n\n\t\tif (!skipDisposeOnOverwrite) {\n\t\t\tthis._store.get(key)?.dispose();\n\t\t}\n\n\t\tthis._store.set(key, value);\n\t}\n\n\t/**\n\t * Delete the value stored for `key` from this map and also dispose of it.\n\t */\n\tdeleteAndDispose(key: K): void {\n\t\tthis._store.get(key)?.dispose();\n\t\tthis._store.delete(key);\n\t}\n\n\t/**\n\t * Delete the value stored for `key` from this map but return it. The caller is\n\t * responsible for disposing of the value.\n\t */\n\tdeleteAndLeak(key: K): V | undefined {\n\t\tconst value = this._store.get(key);\n\t\tthis._store.delete(key);\n\t\treturn value;\n\t}\n\n\tkeys(): IterableIterator<K> {\n\t\treturn this._store.keys();\n\t}\n\n\tvalues(): IterableIterator<V> {\n\t\treturn this._store.values();\n\t}\n\n\t[Symbol.iterator](): IterableIterator<[K, V]> {\n\t\treturn this._store[Symbol.iterator]();\n\t}\n}\n", "/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\nclass Node<E> {\n\n\tstatic readonly Undefined = new Node<any>(undefined);\n\n\telement: E;\n\tnext: Node<E>;\n\tprev: Node<E>;\n\n\tconstructor(element: E) {\n\t\tthis.element = element;\n\t\tthis.next = Node.Undefined;\n\t\tthis.prev = Node.Undefined;\n\t}\n}\n\nexport class LinkedList<E> {\n\n\tprivate _first: Node<E> = Node.Undefined;\n\tprivate _last: Node<E> = Node.Undefined;\n\tprivate _size: number = 0;\n\n\tget size(): number {\n\t\treturn this._size;\n\t}\n\n\tisEmpty(): boolean {\n\t\treturn this._first === Node.Undefined;\n\t}\n\n\tclear(): void {\n\t\tlet node = this._first;\n\t\twhile (node !== Node.Undefined) {\n\t\t\tconst next = node.next;\n\t\t\tnode.prev = Node.Undefined;\n\t\t\tnode.next = Node.Undefined;\n\t\t\tnode = next;\n\t\t}\n\n\t\tthis._first = Node.Undefined;\n\t\tthis._last = Node.Undefined;\n\t\tthis._size = 0;\n\t}\n\n\tunshift(element: E): () => void {\n\t\treturn this._insert(element, false);\n\t}\n\n\tpush(element: E): () => void {\n\t\treturn this._insert(element, true);\n\t}\n\n\tprivate _insert(element: E, atTheEnd: boolean): () => void {\n\t\tconst newNode = new Node(element);\n\t\tif (this._first === Node.Undefined) {\n\t\t\tthis._first = newNode;\n\t\t\tthis._last = newNode;\n\n\t\t} else if (atTheEnd) {\n\t\t\t// push\n\t\t\tconst oldLast = this._last;\n\t\t\tthis._last = newNode;\n\t\t\tnewNode.prev = oldLast;\n\t\t\toldLast.next = newNode;\n\n\t\t} else {\n\t\t\t// unshift\n\t\t\tconst oldFirst = this._first;\n\t\t\tthis._first = newNode;\n\t\t\tnewNode.next = oldFirst;\n\t\t\toldFirst.prev = newNode;\n\t\t}\n\t\tthis._size += 1;\n\n\t\tlet didRemove = false;\n\t\treturn () => {\n\t\t\tif (!didRemove) {\n\t\t\t\tdidRemove = true;\n\t\t\t\tthis._remove(newNode);\n\t\t\t}\n\t\t};\n\t}\n\n\tshift(): E | undefined {\n\t\tif (this._first === Node.Undefined) {\n\t\t\treturn undefined;\n\t\t} else {\n\t\t\tconst res = this._first.element;\n\t\t\tthis._remove(this._first);\n\t\t\treturn res;\n\t\t}\n\t}\n\n\tpop(): E | undefined {\n\t\tif (this._last === Node.Undefined) {\n\t\t\treturn undefined;\n\t\t} else {\n\t\t\tconst res = this._last.element;\n\t\t\tthis._remove(this._last);\n\t\t\treturn res;\n\t\t}\n\t}\n\n\tprivate _remove(node: Node<E>): void {\n\t\tif (node.prev !== Node.Undefined && node.next !== Node.Undefined) {\n\t\t\t// middle\n\t\t\tconst anchor = node.prev;\n\t\t\tanchor.next = node.next;\n\t\t\tnode.next.prev = anchor;\n\n\t\t} else if (node.prev === Node.Undefined && node.next === Node.Undefined) {\n\t\t\t// only node\n\t\t\tthis._first = Node.Undefined;\n\t\t\tthis._last = Node.Undefined;\n\n\t\t} else if (node.next === Node.Undefined) {\n\t\t\t// last\n\t\t\tthis._last = this._last.prev!;\n\t\t\tthis._last.next = Node.Undefined;\n\n\t\t} else if (node.prev === Node.Undefined) {\n\t\t\t// first\n\t\t\tthis._first = this._first.next!;\n\t\t\tthis._first.prev = Node.Undefined;\n\t\t}\n\n\t\t// done\n\t\tthis._size -= 1;\n\t}\n\n\t*[Symbol.iterator](): Iterator<E> {\n\t\tlet node = this._first;\n\t\twhile (node !== Node.Undefined) {\n\t\t\tyield node.element;\n\t\t\tnode = node.next;\n\t\t}\n\t}\n}\n", "/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\n// fake definition so that the valid layers check won't trip on this\ndeclare const globalThis: { performance?: { now(): number } };\n\nconst hasPerformanceNow = (globalThis.performance && typeof globalThis.performance.now === 'function');\n\nexport class StopWatch {\n\n\tprivate _startTime: number;\n\tprivate _stopTime: number;\n\n\tprivate readonly _now: () => number;\n\n\tpublic static create(highResolution?: boolean): StopWatch {\n\t\treturn new StopWatch(highResolution);\n\t}\n\n\tconstructor(highResolution?: boolean) {\n\t\tthis._now = hasPerformanceNow && highResolution === false ? Date.now : globalThis.performance!.now.bind(globalThis.performance);\n\t\tthis._startTime = this._now();\n\t\tthis._stopTime = -1;\n\t}\n\n\tpublic stop(): void {\n\t\tthis._stopTime = this._now();\n\t}\n\n\tpublic reset(): void {\n\t\tthis._startTime = this._now();\n\t\tthis._stopTime = -1;\n\t}\n\n\tpublic elapsed(): number {\n\t\tif (this._stopTime !== -1) {\n\t\t\treturn this._stopTime - this._startTime;\n\t\t}\n\t\treturn this._now() - this._startTime;\n\t}\n}\n", "/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\nimport { CancellationToken } from 'vs/base/common/cancellation';\nimport { onUnexpectedError } from 'vs/base/common/errors';\nimport { createSingleCallFunction } from 'vs/base/common/functional';\nimport { combinedDisposable, Disposable, DisposableMap, DisposableStore, IDisposable, toDisposable } from 'vs/base/common/lifecycle';\nimport { LinkedList } from 'vs/base/common/linkedList';\nimport { IObservable, IObserver } from 'vs/base/common/observable';\nimport { StopWatch } from 'vs/base/common/stopwatch';\nimport { MicrotaskDelay } from 'vs/base/common/symbols';\n\n\n// -----------------------------------------------------------------------------------------------------------------------\n// Uncomment the next line to print warnings whenever a listener is GC'ed without having been disposed. This is a LEAK.\n// -----------------------------------------------------------------------------------------------------------------------\nconst _enableListenerGCedWarning = false\n\t// || Boolean(\"TRUE\") // causes a linter warning so that it cannot be pushed\n\t;\n\n// -----------------------------------------------------------------------------------------------------------------------\n// Uncomment the next line to print warnings whenever an emitter with listeners is disposed. That is a sign of code smell.\n// -----------------------------------------------------------------------------------------------------------------------\nconst _enableDisposeWithListenerWarning = false\n\t// || Boolean(\"TRUE\") // causes a linter warning so that it cannot be pushed\n\t;\n\n\n// -----------------------------------------------------------------------------------------------------------------------\n// Uncomment the next line to print warnings whenever a snapshotted event is used repeatedly without cleanup.\n// See https://github.com/microsoft/vscode/issues/142851\n// -----------------------------------------------------------------------------------------------------------------------\nconst _enableSnapshotPotentialLeakWarning = false\n\t// || Boolean(\"TRUE\") // causes a linter warning so that it cannot be pushed\n\t;\n\n/**\n * An event with zero or one parameters that can be subscribed to. The event is a function itself.\n */\nexport interface Event<T> {\n\t(listener: (e: T) => any, thisArgs?: any, disposables?: IDisposable[] | DisposableStore): IDisposable;\n}\n\nexport namespace Event {\n\texport const None: Event<any> = () => Disposable.None;\n\n\tfunction _addLeakageTraceLogic(options: EmitterOptions) {\n\t\tif (_enableSnapshotPotentialLeakWarning) {\n\t\t\tconst { onDidAddListener: origListenerDidAdd } = options;\n\t\t\tconst stack = Stacktrace.create();\n\t\t\tlet count = 0;\n\t\t\toptions.onDidAddListener = () => {\n\t\t\t\tif (++count === 2) {\n\t\t\t\t\tconsole.warn('snapshotted emitter LIKELY used public and SHOULD HAVE BEEN created with DisposableStore. snapshotted here');\n\t\t\t\t\tstack.print();\n\t\t\t\t}\n\t\t\t\torigListenerDidAdd?.();\n\t\t\t};\n\t\t}\n\t}\n\n\t/**\n\t * Given an event, returns another event which debounces calls and defers the listeners to a later task via a shared\n\t * `setTimeout`. The event is converted into a signal (`Event<void>`) to avoid additional object creation as a\n\t * result of merging events and to try prevent race conditions that could arise when using related deferred and\n\t * non-deferred events.\n\t *\n\t * This is useful for deferring non-critical work (eg. general UI updates) to ensure it does not block critical work\n\t * (eg. latency of keypress to text rendered).\n\t *\n\t * *NOTE* that this function returns an `Event` and it MUST be called with a `DisposableStore` whenever the returned\n\t * event is accessible to \"third parties\", e.g the event is a public property. Otherwise a leaked listener on the\n\t * returned event causes this utility to leak a listener on the original event.\n\t *\n\t * @param event The event source for the new event.\n\t * @param disposable A disposable store to add the new EventEmitter to.\n\t */\n\texport function defer(event: Event<unknown>, disposable?: DisposableStore): Event<void> {\n\t\treturn debounce<unknown, void>(event, () => void 0, 0, undefined, true, undefined, disposable);\n\t}\n\n\t/**\n\t * Given an event, returns another event which only fires once.\n\t *\n\t * @param event The event source for the new event.\n\t */\n\texport function once<T>(event: Event<T>): Event<T> {\n\t\treturn (listener, thisArgs = null, disposables?) => {\n\t\t\t// we need this, in case the event fires during the listener call\n\t\t\tlet didFire = false;\n\t\t\tlet result: IDisposable | undefined = undefined;\n\t\t\tresult = event(e => {\n\t\t\t\tif (didFire) {\n\t\t\t\t\treturn;\n\t\t\t\t} else if (result) {\n\t\t\t\t\tresult.dispose();\n\t\t\t\t} else {\n\t\t\t\t\tdidFire = true;\n\t\t\t\t}\n\n\t\t\t\treturn listener.call(thisArgs, e);\n\t\t\t}, null, disposables);\n\n\t\t\tif (didFire) {\n\t\t\t\tresult.dispose();\n\t\t\t}\n\n\t\t\treturn result;\n\t\t};\n\t}\n\n\t/**\n\t * Maps an event of one type into an event of another type using a mapping function, similar to how\n\t * `Array.prototype.map` works.\n\t *\n\t * *NOTE* that this function returns an `Event` and it MUST be called with a `DisposableStore` whenever the returned\n\t * event is accessible to \"third parties\", e.g the event is a public property. Otherwise a leaked listener on the\n\t * returned event causes this utility to leak a listener on the original event.\n\t *\n\t * @param event The event source for the new event.\n\t * @param map The mapping function.\n\t * @param disposable A disposable store to add the new EventEmitter to.\n\t */\n\texport function map<I, O>(event: Event<I>, map: (i: I) => O, disposable?: DisposableStore): Event<O> {\n\t\treturn snapshot((listener, thisArgs = null, disposables?) => event(i => listener.call(thisArgs, map(i)), null, disposables), disposable);\n\t}\n\n\t/**\n\t * Wraps an event in another event that performs some function on the event object before firing.\n\t *\n\t * *NOTE* that this function returns an `Event` and it MUST be called with a `DisposableStore` whenever the returned\n\t * event is accessible to \"third parties\", e.g the event is a public property. Otherwise a leaked listener on the\n\t * returned event causes this utility to leak a listener on the original event.\n\t *\n\t * @param event The event source for the new event.\n\t * @param each The function to perform on the event object.\n\t * @param disposable A disposable store to add the new EventEmitter to.\n\t */\n\texport function forEach<I>(event: Event<I>, each: (i: I) => void, disposable?: DisposableStore): Event<I> {\n\t\treturn snapshot((listener, thisArgs = null, disposables?) => event(i => { each(i); listener.call(thisArgs, i); }, null, disposables), disposable);\n\t}\n\n\t/**\n\t * Wraps an event in another event that fires only when some condition is met.\n\t *\n\t * *NOTE* that this function returns an `Event` and it MUST be called with a `DisposableStore` whenever the returned\n\t * event is accessible to \"third parties\", e.g the event is a public property. Otherwise a leaked listener on the\n\t * returned event causes this utility to leak a listener on the original event.\n\t *\n\t * @param event The event source for the new event.\n\t * @param filter The filter function that defines the condition. The event will fire for the object if this function\n\t * returns true.\n\t * @param disposable A disposable store to add the new EventEmitter to.\n\t */\n\texport function filter<T, U>(event: Event<T | U>, filter: (e: T | U) => e is T, disposable?: DisposableStore): Event<T>;\n\texport function filter<T>(event: Event<T>, filter: (e: T) => boolean, disposable?: DisposableStore): Event<T>;\n\texport function filter<T, R>(event: Event<T | R>, filter: (e: T | R) => e is R, disposable?: DisposableStore): Event<R>;\n\texport function filter<T>(event: Event<T>, filter: (e: T) => boolean, disposable?: DisposableStore): Event<T> {\n\t\treturn snapshot((listener, thisArgs = null, disposables?) => event(e => filter(e) && listener.call(thisArgs, e), null, disposables), disposable);\n\t}\n\n\t/**\n\t * Given an event, returns the same event but typed as `Event<void>`.\n\t */\n\texport function signal<T>(event: Event<T>): Event<void> {\n\t\treturn event as Event<any> as Event<void>;\n\t}\n\n\t/**\n\t * Given a collection of events, returns a single event which emits whenever any of the provided events emit.\n\t */\n\texport function any<T>(...events: Event<T>[]): Event<T>;\n\texport function any(...events: Event<any>[]): Event<void>;\n\texport function any<T>(...events: Event<T>[]): Event<T> {\n\t\treturn (listener, thisArgs = null, disposables?) => {\n\t\t\tconst disposable = combinedDisposable(...events.map(event => event(e => listener.call(thisArgs, e))));\n\t\t\treturn addAndReturnDisposable(disposable, disposables);\n\t\t};\n\t}\n\n\t/**\n\t * *NOTE* that this function returns an `Event` and it MUST be called with a `DisposableStore` whenever the returned\n\t * event is accessible to \"third parties\", e.g the event is a public property. Otherwise a leaked listener on the\n\t * returned event causes this utility to leak a listener on the original event.\n\t */\n\texport function reduce<I, O>(event: Event<I>, merge: (last: O | undefined, event: I) => O, initial?: O, disposable?: DisposableStore): Event<O> {\n\t\tlet output: O | undefined = initial;\n\n\t\treturn map<I, O>(event, e => {\n\t\t\toutput = merge(output, e);\n\t\t\treturn output;\n\t\t}, disposable);\n\t}\n\n\tfunction snapshot<T>(event: Event<T>, disposable: DisposableStore | undefined): Event<T> {\n\t\tlet listener: IDisposable | undefined;\n\n\t\tconst options: EmitterOptions | undefined = {\n\t\t\tonWillAddFirstListener() {\n\t\t\t\tlistener = event(emitter.fire, emitter);\n\t\t\t},\n\t\t\tonDidRemoveLastListener() {\n\t\t\t\tlistener?.dispose();\n\t\t\t}\n\t\t};\n\n\t\tif (!disposable) {\n\t\t\t_addLeakageTraceLogic(options);\n\t\t}\n\n\t\tconst emitter = new Emitter<T>(options);\n\n\t\tdisposable?.add(emitter);\n\n\t\treturn emitter.event;\n\t}\n\n\t/**\n\t * Adds the IDisposable to the store if it's set, and returns it. Useful to\n\t * Event function implementation.\n\t */\n\tfunction addAndReturnDisposable<T extends IDisposable>(d: T, store: DisposableStore | IDisposable[] | undefined): T {\n\t\tif (store instanceof Array) {\n\t\t\tstore.push(d);\n\t\t} else if (store) {\n\t\t\tstore.add(d);\n\t\t}\n\t\treturn d;\n\t}\n\n\t/**\n\t * Given an event, creates a new emitter that event that will debounce events based on {@link delay} and give an\n\t * array event object of all events that fired.\n\t *\n\t * *NOTE* that this function returns an `Event` and it MUST be called with a `DisposableStore` whenever the returned\n\t * event is accessible to \"third parties\", e.g the event is a public property. Otherwise a leaked listener on the\n\t * returned event causes this utility to leak a listener on the original event.\n\t *\n\t * @param event The original event to debounce.\n\t * @param merge A function that reduces all events into a single event.\n\t * @param delay The number of milliseconds to debounce.\n\t * @param leading Whether to fire a leading event without debouncing.\n\t * @param flushOnListenerRemove Whether to fire all debounced events when a listener is removed. If this is not\n\t * specified, some events could go missing. Use this if it's important that all events are processed, even if the\n\t * listener gets disposed before the debounced event fires.\n\t * @param leakWarningThreshold See {@link EmitterOptions.leakWarningThreshold}.\n\t * @param disposable A disposable store to register the debounce emitter to.\n\t */\n\texport function debounce<T>(event: Event<T>, merge: (last: T | undefined, event: T) => T, delay?: number | typeof MicrotaskDelay, leading?: boolean, flushOnListenerRemove?: boolean, leakWarningThreshold?: number, disposable?: DisposableStore): Event<T>;\n\texport function debounce<I, O>(event: Event<I>, merge: (last: O | undefined, event: I) => O, delay?: number | typeof MicrotaskDelay, leading?: boolean, flushOnListenerRemove?: boolean, leakWarningThreshold?: number, disposable?: DisposableStore): Event<O>;\n\texport function debounce<I, O>(event: Event<I>, merge: (last: O | undefined, event: I) => O, delay: number | typeof MicrotaskDelay = 100, leading = false, flushOnListenerRemove = false, leakWarningThreshold?: number, disposable?: DisposableStore): Event<O> {\n\t\tlet subscription: IDisposable;\n\t\tlet output: O | undefined = undefined;\n\t\tlet handle: any = undefined;\n\t\tlet numDebouncedCalls = 0;\n\t\tlet doFire: (() => void) | undefined;\n\n\t\tconst options: EmitterOptions | undefined = {\n\t\t\tleakWarningThreshold,\n\t\t\tonWillAddFirstListener() {\n\t\t\t\tsubscription = event(cur => {\n\t\t\t\t\tnumDebouncedCalls++;\n\t\t\t\t\toutput = merge(output, cur);\n\n\t\t\t\t\tif (leading && !handle) {\n\t\t\t\t\t\temitter.fire(output);\n\t\t\t\t\t\toutput = undefined;\n\t\t\t\t\t}\n\n\t\t\t\t\tdoFire = () => {\n\t\t\t\t\t\tconst _output = output;\n\t\t\t\t\t\toutput = undefined;\n\t\t\t\t\t\thandle = undefined;\n\t\t\t\t\t\tif (!leading || numDebouncedCalls > 1) {\n\t\t\t\t\t\t\temitter.fire(_output!);\n\t\t\t\t\t\t}\n\t\t\t\t\t\tnumDebouncedCalls = 0;\n\t\t\t\t\t};\n\n\t\t\t\t\tif (typeof delay === 'number') {\n\t\t\t\t\t\tclearTimeout(handle);\n\t\t\t\t\t\thandle = setTimeout(doFire, delay);\n\t\t\t\t\t} else {\n\t\t\t\t\t\tif (handle === undefined) {\n\t\t\t\t\t\t\thandle = 0;\n\t\t\t\t\t\t\tqueueMicrotask(doFire);\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t});\n\t\t\t},\n\t\t\tonWillRemoveListener() {\n\t\t\t\tif (flushOnListenerRemove && numDebouncedCalls > 0) {\n\t\t\t\t\tdoFire?.();\n\t\t\t\t}\n\t\t\t},\n\t\t\tonDidRemoveLastListener() {\n\t\t\t\tdoFire = undefined;\n\t\t\t\tsubscription.dispose();\n\t\t\t}\n\t\t};\n\n\t\tif (!disposable) {\n\t\t\t_addLeakageTraceLogic(options);\n\t\t}\n\n\t\tconst emitter = new Emitter<O>(options);\n\n\t\tdisposable?.add(emitter);\n\n\t\treturn emitter.event;\n\t}\n\n\t/**\n\t * Debounces an event, firing after some delay (default=0) with an array of all event original objects.\n\t *\n\t * *NOTE* that this function returns an `Event` and it MUST be called with a `DisposableStore` whenever the returned\n\t * event is accessible to \"third parties\", e.g the event is a public property. Otherwise a leaked listener on the\n\t * returned event causes this utility to leak a listener on the original event.\n\t */\n\texport function accumulate<T>(event: Event<T>, delay: number = 0, disposable?: DisposableStore): Event<T[]> {\n\t\treturn Event.debounce<T, T[]>(event, (last, e) => {\n\t\t\tif (!last) {\n\t\t\t\treturn [e];\n\t\t\t}\n\t\t\tlast.push(e);\n\t\t\treturn last;\n\t\t}, delay, undefined, true, undefined, disposable);\n\t}\n\n\t/**\n\t * Filters an event such that some condition is _not_ met more than once in a row, effectively ensuring duplicate\n\t * event objects from different sources do not fire the same event object.\n\t *\n\t * *NOTE* that this function returns an `Event` and it MUST be called with a `DisposableStore` whenever the returned\n\t * event is accessible to \"third parties\", e.g the event is a public property. Otherwise a leaked listener on the\n\t * returned event causes this utility to leak a listener on the original event.\n\t *\n\t * @param event The event source for the new event.\n\t * @param equals The equality condition.\n\t * @param disposable A disposable store to add the new EventEmitter to.\n\t *\n\t * @example\n\t * ```\n\t * // Fire only one time when a single window is opened or focused\n\t * Event.latch(Event.any(onDidOpenWindow, onDidFocusWindow))\n\t * ```\n\t */\n\texport function latch<T>(event: Event<T>, equals: (a: T, b: T) => boolean = (a, b) => a === b, disposable?: DisposableStore): Event<T> {\n\t\tlet firstCall = true;\n\t\tlet cache: T;\n\n\t\treturn filter(event, value => {\n\t\t\tconst shouldEmit = firstCall || !equals(value, cache);\n\t\t\tfirstCall = false;\n\t\t\tcache = value;\n\t\t\treturn shouldEmit;\n\t\t}, disposable);\n\t}\n\n\t/**\n\t * Splits an event whose parameter is a union type into 2 separate events for each type in the union.\n\t *\n\t * *NOTE* that this function returns an `Event` and it MUST be called with a `DisposableStore` whenever the returned\n\t * event is accessible to \"third parties\", e.g the event is a public property. Otherwise a leaked listener on the\n\t * returned event causes this utility to leak a listener on the original event.\n\t *\n\t * @example\n\t * ```\n\t * const event = new EventEmitter<number | undefined>().event;\n\t * const [numberEvent, undefinedEvent] = Event.split(event, isUndefined);\n\t * ```\n\t *\n\t * @param event The event source for the new event.\n\t * @param isT A function that determines what event is of the first type.\n\t * @param disposable A disposable store to add the new EventEmitter to.\n\t */\n\texport function split<T, U>(event: Event<T | U>, isT: (e: T | U) => e is T, disposable?: DisposableStore): [Event<T>, Event<U>] {\n\t\treturn [\n\t\t\tEvent.filter(event, isT, disposable),\n\t\t\tEvent.filter(event, e => !isT(e), disposable) as Event<U>,\n\t\t];\n\t}\n\n\t/**\n\t * Buffers an event until it has a listener attached.\n\t *\n\t * *NOTE* that this function returns an `Event` and it MUST be called with a `DisposableStore` whenever the returned\n\t * event is accessible to \"third parties\", e.g the event is a public property. Otherwise a leaked listener on the\n\t * returned event causes this utility to leak a listener on the original event.\n\t *\n\t * @param event The event source for the new event.\n\t * @param flushAfterTimeout Determines whether to flush the buffer after a timeout immediately or after a\n\t * `setTimeout` when the first event listener is added.\n\t * @param _buffer Internal: A source event array used for tests.\n\t *\n\t * @example\n\t * ```\n\t * // Start accumulating events, when the first listener is attached, flush\n\t * // the event after a timeout such that multiple listeners attached before\n\t * // the timeout would receive the event\n\t * this.onInstallExtension = Event.buffer(service.onInstallExtension, true);\n\t * ```\n\t */\n\texport function buffer<T>(event: Event<T>, flushAfterTimeout = false, _buffer: T[] = [], disposable?: DisposableStore): Event<T> {\n\t\tlet buffer: T[] | null = _buffer.slice();\n\n\t\tlet listener: IDisposable | null = event(e => {\n\t\t\tif (buffer) {\n\t\t\t\tbuffer.push(e);\n\t\t\t} else {\n\t\t\t\temitter.fire(e);\n\t\t\t}\n\t\t});\n\n\t\tif (disposable) {\n\t\t\tdisposable.add(listener);\n\t\t}\n\n\t\tconst flush = () => {\n\t\t\tbuffer?.forEach(e => emitter.fire(e));\n\t\t\tbuffer = null;\n\t\t};\n\n\t\tconst emitter = new Emitter<T>({\n\t\t\tonWillAddFirstListener() {\n\t\t\t\tif (!listener) {\n\t\t\t\t\tlistener = event(e => emitter.fire(e));\n\t\t\t\t\tif (disposable) {\n\t\t\t\t\t\tdisposable.add(listener);\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t},\n\n\t\t\tonDidAddFirstListener() {\n\t\t\t\tif (buffer) {\n\t\t\t\t\tif (flushAfterTimeout) {\n\t\t\t\t\t\tsetTimeout(flush);\n\t\t\t\t\t} else {\n\t\t\t\t\t\tflush();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t},\n\n\t\t\tonDidRemoveLastListener() {\n\t\t\t\tif (listener) {\n\t\t\t\t\tlistener.dispose();\n\t\t\t\t}\n\t\t\t\tlistener = null;\n\t\t\t}\n\t\t});\n\n\t\tif (disposable) {\n\t\t\tdisposable.add(emitter);\n\t\t}\n\n\t\treturn emitter.event;\n\t}\n\t/**\n\t * Wraps the event in an {@link IChainableEvent}, allowing a more functional programming style.\n\t *\n\t * @example\n\t * ```\n\t * // Normal\n\t * const onEnterPressNormal = Event.filter(\n\t *   Event.map(onKeyPress.event, e => new StandardKeyboardEvent(e)),\n\t *   e.keyCode === KeyCode.Enter\n\t * ).event;\n\t *\n\t * // Using chain\n\t * const onEnterPressChain = Event.chain(onKeyPress.event, $ => $\n\t *   .map(e => new StandardKeyboardEvent(e))\n\t *   .filter(e => e.keyCode === KeyCode.Enter)\n\t * );\n\t * ```\n\t */\n\texport function chain<T, R>(event: Event<T>, sythensize: ($: IChainableSythensis<T>) => IChainableSythensis<R>): Event<R> {\n\t\tconst fn: Event<R> = (listener, thisArgs, disposables) => {\n\t\t\tconst cs = sythensize(new ChainableSynthesis()) as ChainableSynthesis;\n\t\t\treturn event(function (value) {\n\t\t\t\tconst result = cs.evaluate(value);\n\t\t\t\tif (result !== HaltChainable) {\n\t\t\t\t\tlistener.call(thisArgs, result);\n\t\t\t\t}\n\t\t\t}, undefined, disposables);\n\t\t};\n\n\t\treturn fn;\n\t}\n\n\tconst HaltChainable = Symbol('HaltChainable');\n\n\tclass ChainableSynthesis implements IChainableSythensis<any> {\n\t\tprivate readonly steps: ((input: any) => any)[] = [];\n\n\t\tmap<O>(fn: (i: any) => O): this {\n\t\t\tthis.steps.push(fn);\n\t\t\treturn this;\n\t\t}\n\n\t\tforEach(fn: (i: any) => void): this {\n\t\t\tthis.steps.push(v => {\n\t\t\t\tfn(v);\n\t\t\t\treturn v;\n\t\t\t});\n\t\t\treturn this;\n\t\t}\n\n\t\tfilter(fn: (e: any) => boolean): this {\n\t\t\tthis.steps.push(v => fn(v) ? v : HaltChainable);\n\t\t\treturn this;\n\t\t}\n\n\t\treduce<R>(merge: (last: R | undefined, event: any) => R, initial?: R | undefined): this {\n\t\t\tlet last = initial;\n\t\t\tthis.steps.push(v => {\n\t\t\t\tlast = merge(last, v);\n\t\t\t\treturn last;\n\t\t\t});\n\t\t\treturn this;\n\t\t}\n\n\t\tlatch(equals: (a: any, b: any) => boolean = (a, b) => a === b): ChainableSynthesis {\n\t\t\tlet firstCall = true;\n\t\t\tlet cache: any;\n\t\t\tthis.steps.push(value => {\n\t\t\t\tconst shouldEmit = firstCall || !equals(value, cache);\n\t\t\t\tfirstCall = false;\n\t\t\t\tcache = value;\n\t\t\t\treturn shouldEmit ? value : HaltChainable;\n\t\t\t});\n\n\t\t\treturn this;\n\t\t}\n\n\t\tpublic evaluate(value: any) {\n\t\t\tfor (const step of this.steps) {\n\t\t\t\tvalue = step(value);\n\t\t\t\tif (value === HaltChainable) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn value;\n\t\t}\n\t}\n\n\texport interface IChainableSythensis<T> {\n\t\tmap<O>(fn: (i: T) => O): IChainableSythensis<O>;\n\t\tforEach(fn: (i: T) => void): IChainableSythensis<T>;\n\t\tfilter<R extends T>(fn: (e: T) => e is R): IChainableSythensis<R>;\n\t\tfilter(fn: (e: T) => boolean): IChainableSythensis<T>;\n\t\treduce<R>(merge: (last: R, event: T) => R, initial: R): IChainableSythensis<R>;\n\t\treduce<R>(merge: (last: R | undefined, event: T) => R): IChainableSythensis<R>;\n\t\tlatch(equals?: (a: T, b: T) => boolean): IChainableSythensis<T>;\n\t}\n\n\texport interface NodeEventEmitter {\n\t\ton(event: string | symbol, listener: Function): unknown;\n\t\tremoveListener(event: string | symbol, listener: Function): unknown;\n\t}\n\n\t/**\n\t * Creates an {@link Event} from a node event emitter.\n\t */\n\texport function fromNodeEventEmitter<T>(emitter: NodeEventEmitter, eventName: string, map: (...args: any[]) => T = id => id): Event<T> {\n\t\tconst fn = (...args: any[]) => result.fire(map(...args));\n\t\tconst onFirstListenerAdd = () => emitter.on(eventName, fn);\n\t\tconst onLastListenerRemove = () => emitter.removeListener(eventName, fn);\n\t\tconst result = new Emitter<T>({ onWillAddFirstListener: onFirstListenerAdd, onDidRemoveLastListener: onLastListenerRemove });\n\n\t\treturn result.event;\n\t}\n\n\texport interface DOMEventEmitter {\n\t\taddEventListener(event: string | symbol, listener: Function): void;\n\t\tremoveEventListener(event: string | symbol, listener: Function): void;\n\t}\n\n\t/**\n\t * Creates an {@link Event} from a DOM event emitter.\n\t */\n\texport function fromDOMEventEmitter<T>(emitter: DOMEventEmitter, eventName: string, map: (...args: any[]) => T = id => id): Event<T> {\n\t\tconst fn = (...args: any[]) => result.fire(map(...args));\n\t\tconst onFirstListenerAdd = () => emitter.addEventListener(eventName, fn);\n\t\tconst onLastListenerRemove = () => emitter.removeEventListener(eventName, fn);\n\t\tconst result = new Emitter<T>({ onWillAddFirstListener: onFirstListenerAdd, onDidRemoveLastListener: onLastListenerRemove });\n\n\t\treturn result.event;\n\t}\n\n\t/**\n\t * Creates a promise out of an event, using the {@link Event.once} helper.\n\t */\n\texport function toPromise<T>(event: Event<T>): Promise<T> {\n\t\treturn new Promise(resolve => once(event)(resolve));\n\t}\n\n\t/**\n\t * Creates an event out of a promise that fires once when the promise is\n\t * resolved with the result of the promise or `undefined`.\n\t */\n\texport function fromPromise<T>(promise: Promise<T>): Event<T | undefined> {\n\t\tconst result = new Emitter<T | undefined>();\n\n\t\tpromise.then(res => {\n\t\t\tresult.fire(res);\n\t\t}, () => {\n\t\t\tresult.fire(undefined);\n\t\t}).finally(() => {\n\t\t\tresult.dispose();\n\t\t});\n\n\t\treturn result.event;\n\t}\n\n\t/**\n\t * A convenience function for forwarding an event to another emitter which\n\t * improves readability.allows Event.forward(event, emitter) instead of `event(e => emitter.fire(e))`.\n\t * @param from The event to forward.\n\t * @param to The emitter to forward the event to.\n\t * @example\n\t * Event.forward(event, emitter);\n\t * // equivalent to\n\t * event(e => emitter.fire(e));\n\t * // equivalent to\n\t * event(emitter.fire, emitter);\n\t */\n\texport function forward<T>(from: Event<T>, to: Emitter<T>): IDisposable {\n\t\treturn from(e => to.fire(e));\n\t}\n\n\t/**\n\t * Adds a listener to an event and calls the listener immediately with undefined as the event object.\n\t *\n\t * @example\n\t * ```\n\t * // Initialize the UI and update it when dataChangeEvent fires\n\t * runAndSubscribe(dataChangeEvent, () => this._updateUI());\n\t * ```\n\t */\n\texport function runAndSubscribe<T>(event: Event<T>, handler: (e: T) => any, initial: T): IDisposable;\n\texport function runAndSubscribe<T>(event: Event<T>, handler: (e: T | undefined) => any): IDisposable;\n\texport function runAndSubscribe<T>(event: Event<T>, handler: (e: T | undefined) => any, initial?: T): IDisposable {\n\t\thandler(initial);\n\t\treturn event(e => handler(e));\n\t}\n\n\tclass EmitterObserver<T> implements IObserver {\n\n\t\treadonly emitter: Emitter<T>;\n\n\t\tprivate _counter = 0;\n\t\tprivate _hasChanged = false;\n\n\t\tconstructor(readonly _observable: IObservable<T, any>, store: DisposableStore | undefined) {\n\t\t\tconst options: EmitterOptions = {\n\t\t\t\tonWillAddFirstListener: () => {\n\t\t\t\t\t_observable.addObserver(this);\n\t\t\t\t},\n\t\t\t\tonDidRemoveLastListener: () => {\n\t\t\t\t\t_observable.removeObserver(this);\n\t\t\t\t}\n\t\t\t};\n\t\t\tif (!store) {\n\t\t\t\t_addLeakageTraceLogic(options);\n\t\t\t}\n\t\t\tthis.emitter = new Emitter<T>(options);\n\t\t\tif (store) {\n\t\t\t\tstore.add(this.emitter);\n\t\t\t}\n\t\t}\n\n\t\tbeginUpdate<T>(_observable: IObservable<T, void>): void {\n\t\t\t// assert(_observable === this.obs);\n\t\t\tthis._counter++;\n\t\t}\n\n\t\thandlePossibleChange<T>(_observable: IObservable<T, unknown>): void {\n\t\t\t// assert(_observable === this.obs);\n\t\t}\n\n\t\thandleChange<T, TChange>(_observable: IObservable<T, TChange>, _change: TChange): void {\n\t\t\t// assert(_observable === this.obs);\n\t\t\tthis._hasChanged = true;\n\t\t}\n\n\t\tendUpdate<T>(_observable: IObservable<T, void>): void {\n\t\t\t// assert(_observable === this.obs);\n\t\t\tthis._counter--;\n\t\t\tif (this._counter === 0) {\n\t\t\t\tthis._observable.reportChanges();\n\t\t\t\tif (this._hasChanged) {\n\t\t\t\t\tthis._hasChanged = false;\n\t\t\t\t\tthis.emitter.fire(this._observable.get());\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Creates an event emitter that is fired when the observable changes.\n\t * Each listeners subscribes to the emitter.\n\t */\n\texport function fromObservable<T>(obs: IObservable<T, any>, store?: DisposableStore): Event<T> {\n\t\tconst observer = new EmitterObserver(obs, store);\n\t\treturn observer.emitter.event;\n\t}\n\n\t/**\n\t * Each listener is attached to the observable directly.\n\t */\n\texport function fromObservableLight(observable: IObservable<any>): Event<void> {\n\t\treturn (listener, thisArgs, disposables) => {\n\t\t\tlet count = 0;\n\t\t\tlet didChange = false;\n\t\t\tconst observer: IObserver = {\n\t\t\t\tbeginUpdate() {\n\t\t\t\t\tcount++;\n\t\t\t\t},\n\t\t\t\tendUpdate() {\n\t\t\t\t\tcount--;\n\t\t\t\t\tif (count === 0) {\n\t\t\t\t\t\tobservable.reportChanges();\n\t\t\t\t\t\tif (didChange) {\n\t\t\t\t\t\t\tdidChange = false;\n\t\t\t\t\t\t\tlistener.call(thisArgs);\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t},\n\t\t\t\thandlePossibleChange() {\n\t\t\t\t\t// noop\n\t\t\t\t},\n\t\t\t\thandleChange() {\n\t\t\t\t\tdidChange = true;\n\t\t\t\t}\n\t\t\t};\n\t\t\tobservable.addObserver(observer);\n\t\t\tobservable.reportChanges();\n\t\t\tconst disposable = {\n\t\t\t\tdispose() {\n\t\t\t\t\tobservable.removeObserver(observer);\n\t\t\t\t}\n\t\t\t};\n\n\t\t\tif (disposables instanceof DisposableStore) {\n\t\t\t\tdisposables.add(disposable);\n\t\t\t} else if (Array.isArray(disposables)) {\n\t\t\t\tdisposables.push(disposable);\n\t\t\t}\n\n\t\t\treturn disposable;\n\t\t};\n\t}\n}\n\nexport interface EmitterOptions {\n\t/**\n\t * Optional function that's called *before* the very first listener is added\n\t */\n\tonWillAddFirstListener?: Function;\n\t/**\n\t * Optional function that's called *after* the very first listener is added\n\t */\n\tonDidAddFirstListener?: Function;\n\t/**\n\t * Optional function that's called after a listener is added\n\t */\n\tonDidAddListener?: Function;\n\t/**\n\t * Optional function that's called *after* remove the very last listener\n\t */\n\tonDidRemoveLastListener?: Function;\n\t/**\n\t * Optional function that's called *before* a listener is removed\n\t */\n\tonWillRemoveListener?: Function;\n\t/**\n\t * Optional function that's called when a listener throws an error. Defaults to\n\t * {@link onUnexpectedError}\n\t */\n\tonListenerError?: (e: any) => void;\n\t/**\n\t * Number of listeners that are allowed before assuming a leak. Default to\n\t * a globally configured value\n\t *\n\t * @see setGlobalLeakWarningThreshold\n\t */\n\tleakWarningThreshold?: number;\n\t/**\n\t * Pass in a delivery queue, which is useful for ensuring\n\t * in order event delivery across multiple emitters.\n\t */\n\tdeliveryQueue?: EventDeliveryQueue;\n\n\t/** ONLY enable this during development */\n\t_profName?: string;\n}\n\n\nexport class EventProfiling {\n\n\tstatic readonly all = new Set<EventProfiling>();\n\n\tprivate static _idPool = 0;\n\n\treadonly name: string;\n\tpublic listenerCount: number = 0;\n\tpublic invocationCount = 0;\n\tpublic elapsedOverall = 0;\n\tpublic durations: number[] = [];\n\n\tprivate _stopWatch?: StopWatch;\n\n\tconstructor(name: string) {\n\t\tthis.name = `${name}_${EventProfiling._idPool++}`;\n\t\tEventProfiling.all.add(this);\n\t}\n\n\tstart(listenerCount: number): void {\n\t\tthis._stopWatch = new StopWatch();\n\t\tthis.listenerCount = listenerCount;\n\t}\n\n\tstop(): void {\n\t\tif (this._stopWatch) {\n\t\t\tconst elapsed = this._stopWatch.elapsed();\n\t\t\tthis.durations.push(elapsed);\n\t\t\tthis.elapsedOverall += elapsed;\n\t\t\tthis.invocationCount += 1;\n\t\t\tthis._stopWatch = undefined;\n\t\t}\n\t}\n}\n\nlet _globalLeakWarningThreshold = -1;\nexport function setGlobalLeakWarningThreshold(n: number): IDisposable {\n\tconst oldValue = _globalLeakWarningThreshold;\n\t_globalLeakWarningThreshold = n;\n\treturn {\n\t\tdispose() {\n\t\t\t_globalLeakWarningThreshold = oldValue;\n\t\t}\n\t};\n}\n\nclass LeakageMonitor {\n\n\tprivate static _idPool = 1;\n\n\tprivate _stacks: Map<string, number> | undefined;\n\tprivate _warnCountdown: number = 0;\n\n\tconstructor(\n\t\tprivate readonly _errorHandler: (err: Error) => void,\n\t\treadonly threshold: number,\n\t\treadonly name: string = (LeakageMonitor._idPool++).toString(16).padStart(3, '0')\n\t) { }\n\n\tdispose(): void {\n\t\tthis._stacks?.clear();\n\t}\n\n\tcheck(stack: Stacktrace, listenerCount: number): undefined | (() => void) {\n\n\t\tconst threshold = this.threshold;\n\t\tif (threshold <= 0 || listenerCount < threshold) {\n\t\t\treturn undefined;\n\t\t}\n\n\t\tif (!this._stacks) {\n\t\t\tthis._stacks = new Map();\n\t\t}\n\t\tconst count = (this._stacks.get(stack.value) || 0);\n\t\tthis._stacks.set(stack.value, count + 1);\n\t\tthis._warnCountdown -= 1;\n\n\t\tif (this._warnCountdown <= 0) {\n\t\t\t// only warn on first exceed and then every time the limit\n\t\t\t// is exceeded by 50% again\n\t\t\tthis._warnCountdown = threshold * 0.5;\n\n\t\t\tconst [topStack, topCount] = this.getMostFrequentStack()!;\n\t\t\tconst message = `[${this.name}] potential listener LEAK detected, having ${listenerCount} listeners already. MOST frequent listener (${topCount}):`;\n\t\t\tconsole.warn(message);\n\t\t\tconsole.warn(topStack!);\n\n\t\t\tconst error = new ListenerLeakError(message, topStack);\n\t\t\tthis._errorHandler(error);\n\t\t}\n\n\t\treturn () => {\n\t\t\tconst count = (this._stacks!.get(stack.value) || 0);\n\t\t\tthis._stacks!.set(stack.value, count - 1);\n\t\t};\n\t}\n\n\tgetMostFrequentStack(): [string, number] | undefined {\n\t\tif (!this._stacks) {\n\t\t\treturn undefined;\n\t\t}\n\t\tlet topStack: [string, number] | undefined;\n\t\tlet topCount: number = 0;\n\t\tfor (const [stack, count] of this._stacks) {\n\t\t\tif (!topStack || topCount < count) {\n\t\t\t\ttopStack = [stack, count];\n\t\t\t\ttopCount = count;\n\t\t\t}\n\t\t}\n\t\treturn topStack;\n\t}\n}\n\nclass Stacktrace {\n\n\tstatic create() {\n\t\tconst err = new Error();\n\t\treturn new Stacktrace(err.stack ?? '');\n\t}\n\n\tprivate constructor(readonly value: string) { }\n\n\tprint() {\n\t\tconsole.warn(this.value.split('\\n').slice(2).join('\\n'));\n\t}\n}\n\n// error that is logged when going over the configured listener threshold\nexport class ListenerLeakError extends Error {\n\tconstructor(message: string, stack: string) {\n\t\tsuper(message);\n\t\tthis.name = 'ListenerLeakError';\n\t\tthis.stack = stack;\n\t}\n}\n\n// SEVERE error that is logged when having gone way over the configured listener\n// threshold so that the emitter refuses to accept more listeners\nexport class ListenerRefusalError extends Error {\n\tconstructor(message: string, stack: string) {\n\t\tsuper(message);\n\t\tthis.name = 'ListenerRefusalError';\n\t\tthis.stack = stack;\n\t}\n}\n\nlet id = 0;\nclass UniqueContainer<T> {\n\tstack?: Stacktrace;\n\tpublic id = id++;\n\tconstructor(public readonly value: T) { }\n}\nconst compactionThreshold = 2;\n\ntype ListenerContainer<T> = UniqueContainer<(data: T) => void>;\ntype ListenerOrListeners<T> = (ListenerContainer<T> | undefined)[] | ListenerContainer<T>;\n\nconst forEachListener = <T>(listeners: ListenerOrListeners<T>, fn: (c: ListenerContainer<T>) => void) => {\n\tif (listeners instanceof UniqueContainer) {\n\t\tfn(listeners);\n\t} else {\n\t\tfor (let i = 0; i < listeners.length; i++) {\n\t\t\tconst l = listeners[i];\n\t\t\tif (l) {\n\t\t\t\tfn(l);\n\t\t\t}\n\t\t}\n\t}\n};\n\n\nlet _listenerFinalizers: FinalizationRegistry<string> | undefined;\n\nif (_enableListenerGCedWarning) {\n\tconst leaks: string[] = [];\n\n\tsetInterval(() => {\n\t\tif (leaks.length === 0) {\n\t\t\treturn;\n\t\t}\n\t\tconsole.warn('[LEAKING LISTENERS] GC\\'ed these listeners that were NOT yet disposed:');\n\t\tconsole.warn(leaks.join('\\n'));\n\t\tleaks.length = 0;\n\t}, 3000);\n\n\t_listenerFinalizers = new FinalizationRegistry(heldValue => {\n\t\tif (typeof heldValue === 'string') {\n\t\t\tleaks.push(heldValue);\n\t\t}\n\t});\n}\n\n/**\n * The Emitter can be used to expose an Event to the public\n * to fire it from the insides.\n * Sample:\n\tclass Document {\n\n\t\tprivate readonly _onDidChange = new Emitter<(value:string)=>any>();\n\n\t\tpublic onDidChange = this._onDidChange.event;\n\n\t\t// getter-style\n\t\t// get onDidChange(): Event<(value:string)=>any> {\n\t\t// \treturn this._onDidChange.event;\n\t\t// }\n\n\t\tprivate _doIt() {\n\t\t\t//...\n\t\t\tthis._onDidChange.fire(value);\n\t\t}\n\t}\n */\nexport class Emitter<T> {\n\n\tprivate readonly _options?: EmitterOptions;\n\tprivate readonly _leakageMon?: LeakageMonitor;\n\tprivate readonly _perfMon?: EventProfiling;\n\tprivate _disposed?: true;\n\tprivate _event?: Event<T>;\n\n\t/**\n\t * A listener, or list of listeners. A single listener is the most common\n\t * for event emitters (#185789), so we optimize that special case to avoid\n\t * wrapping it in an array (just like Node.js itself.)\n\t *\n\t * A list of listeners never 'downgrades' back to a plain function if\n\t * listeners are removed, for two reasons:\n\t *\n\t *  1. That's complicated (especially with the deliveryQueue)\n\t *  2. A listener with >1 listener is likely to have >1 listener again at\n\t *     some point, and swapping between arrays and functions may[citation needed]\n\t *     introduce unnecessary work and garbage.\n\t *\n\t * The array listeners can be 'sparse', to avoid reallocating the array\n\t * whenever any listener is added or removed. If more than `1 / compactionThreshold`\n\t * of the array is empty, only then is it resized.\n\t */\n\tprotected _listeners?: ListenerOrListeners<T>;\n\n\t/**\n\t * Always to be defined if _listeners is an array. It's no longer a true\n\t * queue, but holds the dispatching 'state'. If `fire()` is called on an\n\t * emitter, any work left in the _deliveryQueue is finished first.\n\t */\n\tprivate _deliveryQueue?: EventDeliveryQueuePrivate;\n\tprotected _size = 0;\n\n\tconstructor(options?: EmitterOptions) {\n\t\tthis._options = options;\n\t\tthis._leakageMon = (_globalLeakWarningThreshold > 0 || this._options?.leakWarningThreshold)\n\t\t\t? new LeakageMonitor(options?.onListenerError ?? onUnexpectedError, this._options?.leakWarningThreshold ?? _globalLeakWarningThreshold) :\n\t\t\tundefined;\n\t\tthis._perfMon = this._options?._profName ? new EventProfiling(this._options._profName) : undefined;\n\t\tthis._deliveryQueue = this._options?.deliveryQueue as EventDeliveryQueuePrivate | undefined;\n\t}\n\n\tdispose() {\n\t\tif (!this._disposed) {\n\t\t\tthis._disposed = true;\n\n\t\t\t// It is bad to have listeners at the time of disposing an emitter, it is worst to have listeners keep the emitter\n\t\t\t// alive via the reference that's embedded in their disposables. Therefore we loop over all remaining listeners and\n\t\t\t// unset their subscriptions/disposables. Looping and blaming remaining listeners is done on next tick because the\n\t\t\t// the following programming pattern is very popular:\n\t\t\t//\n\t\t\t// const someModel = this._disposables.add(new ModelObject()); // (1) create and register model\n\t\t\t// this._disposables.add(someModel.onDidChange(() => { ... }); // (2) subscribe and register model-event listener\n\t\t\t// ...later...\n\t\t\t// this._disposables.dispose(); disposes (1) then (2): don't warn after (1) but after the \"overall dispose\" is done\n\n\t\t\tif (this._deliveryQueue?.current === this) {\n\t\t\t\tthis._deliveryQueue.reset();\n\t\t\t}\n\t\t\tif (this._listeners) {\n\t\t\t\tif (_enableDisposeWithListenerWarning) {\n\t\t\t\t\tconst listeners = this._listeners;\n\t\t\t\t\tqueueMicrotask(() => {\n\t\t\t\t\t\tforEachListener(listeners, l => l.stack?.print());\n\t\t\t\t\t});\n\t\t\t\t}\n\n\t\t\t\tthis._listeners = undefined;\n\t\t\t\tthis._size = 0;\n\t\t\t}\n\t\t\tthis._options?.onDidRemoveLastListener?.();\n\t\t\tthis._leakageMon?.dispose();\n\t\t}\n\t}\n\n\t/**\n\t * For the public to allow to subscribe\n\t * to events from this Emitter\n\t */\n\tget event(): Event<T> {\n\t\tthis._event ??= (callback: (e: T) => any, thisArgs?: any, disposables?: IDisposable[] | DisposableStore) => {\n\t\t\tif (this._leakageMon && this._size > this._leakageMon.threshold ** 2) {\n\t\t\t\tconst message = `[${this._leakageMon.name}] REFUSES to accept new listeners because it exceeded its threshold by far (${this._size} vs ${this._leakageMon.threshold})`;\n\t\t\t\tconsole.warn(message);\n\n\t\t\t\tconst tuple = this._leakageMon.getMostFrequentStack() ?? ['UNKNOWN stack', -1];\n\t\t\t\tconst error = new ListenerRefusalError(`${message}. HINT: Stack shows most frequent listener (${tuple[1]}-times)`, tuple[0]);\n\t\t\t\tconst errorHandler = this._options?.onListenerError || onUnexpectedError;\n\t\t\t\terrorHandler(error);\n\n\t\t\t\treturn Disposable.None;\n\t\t\t}\n\n\t\t\tif (this._disposed) {\n\t\t\t\t// todo: should we warn if a listener is added to a disposed emitter? This happens often\n\t\t\t\treturn Disposable.None;\n\t\t\t}\n\n\t\t\tif (thisArgs) {\n\t\t\t\tcallback = callback.bind(thisArgs);\n\t\t\t}\n\n\t\t\tconst contained = new UniqueContainer(callback);\n\n\t\t\tlet removeMonitor: Function | undefined;\n\t\t\tlet stack: Stacktrace | undefined;\n\t\t\tif (this._leakageMon && this._size >= Math.ceil(this._leakageMon.threshold * 0.2)) {\n\t\t\t\t// check and record this emitter for potential leakage\n\t\t\t\tcontained.stack = Stacktrace.create();\n\t\t\t\tremoveMonitor = this._leakageMon.check(contained.stack, this._size + 1);\n\t\t\t}\n\n\t\t\tif (_enableDisposeWithListenerWarning) {\n\t\t\t\tcontained.stack = stack ?? Stacktrace.create();\n\t\t\t}\n\n\t\t\tif (!this._listeners) {\n\t\t\t\tthis._options?.onWillAddFirstListener?.(this);\n\t\t\t\tthis._listeners = contained;\n\t\t\t\tthis._options?.onDidAddFirstListener?.(this);\n\t\t\t} else if (this._listeners instanceof UniqueContainer) {\n\t\t\t\tthis._deliveryQueue ??= new EventDeliveryQueuePrivate();\n\t\t\t\tthis._listeners = [this._listeners, contained];\n\t\t\t} else {\n\t\t\t\tthis._listeners.push(contained);\n\t\t\t}\n\n\t\t\tthis._size++;\n\n\n\t\t\tconst result = toDisposable(() => {\n\t\t\t\t_listenerFinalizers?.unregister(result);\n\t\t\t\tremoveMonitor?.();\n\t\t\t\tthis._removeListener(contained);\n\t\t\t});\n\t\t\tif (disposables instanceof DisposableStore) {\n\t\t\t\tdisposables.add(result);\n\t\t\t} else if (Array.isArray(disposables)) {\n\t\t\t\tdisposables.push(result);\n\t\t\t}\n\n\t\t\tif (_listenerFinalizers) {\n\t\t\t\tconst stack = new Error().stack!.split('\\n').slice(2, 3).join('\\n').trim();\n\t\t\t\tconst match = /(file:|vscode-file:\\/\\/vscode-app)?(\\/[^:]*:\\d+:\\d+)/.exec(stack);\n\t\t\t\t_listenerFinalizers.register(result, match?.[2] ?? stack, result);\n\t\t\t}\n\n\t\t\treturn result;\n\t\t};\n\n\t\treturn this._event;\n\t}\n\n\tprivate _removeListener(listener: ListenerContainer<T>) {\n\t\tthis._options?.onWillRemoveListener?.(this);\n\n\t\tif (!this._listeners) {\n\t\t\treturn; // expected if a listener gets disposed\n\t\t}\n\n\t\tif (this._size === 1) {\n\t\t\tthis._listeners = undefined;\n\t\t\tthis._options?.onDidRemoveLastListener?.(this);\n\t\t\tthis._size = 0;\n\t\t\treturn;\n\t\t}\n\n\t\t// size > 1 which requires that listeners be a list:\n\t\tconst listeners = this._listeners as (ListenerContainer<T> | undefined)[];\n\n\t\tconst index = listeners.indexOf(listener);\n\t\tif (index === -1) {\n\t\t\tconsole.log('disposed?', this._disposed);\n\t\t\tconsole.log('size?', this._size);\n\t\t\tconsole.log('arr?', JSON.stringify(this._listeners));\n\t\t\tthrow new Error('Attempted to dispose unknown listener');\n\t\t}\n\n\t\tthis._size--;\n\t\tlisteners[index] = undefined;\n\n\t\tconst adjustDeliveryQueue = this._deliveryQueue!.current === this;\n\t\tif (this._size * compactionThreshold <= listeners.length) {\n\t\t\tlet n = 0;\n\t\t\tfor (let i = 0; i < listeners.length; i++) {\n\t\t\t\tif (listeners[i]) {\n\t\t\t\t\tlisteners[n++] = listeners[i];\n\t\t\t\t} else if (adjustDeliveryQueue) {\n\t\t\t\t\tthis._deliveryQueue!.end--;\n\t\t\t\t\tif (n < this._deliveryQueue!.i) {\n\t\t\t\t\t\tthis._deliveryQueue!.i--;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\tlisteners.length = n;\n\t\t}\n\t}\n\n\tprivate _deliver(listener: undefined | UniqueContainer<(value: T) => void>, value: T) {\n\t\tif (!listener) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst errorHandler = this._options?.onListenerError || onUnexpectedError;\n\t\tif (!errorHandler) {\n\t\t\tlistener.value(value);\n\t\t\treturn;\n\t\t}\n\n\t\ttry {\n\t\t\tlistener.value(value);\n\t\t} catch (e) {\n\t\t\terrorHandler(e);\n\t\t}\n\t}\n\n\t/** Delivers items in the queue. Assumes the queue is ready to go. */\n\tprivate _deliverQueue(dq: EventDeliveryQueuePrivate) {\n\t\tconst listeners = dq.current!._listeners! as (ListenerContainer<T> | undefined)[];\n\t\twhile (dq.i < dq.end) {\n\t\t\t// important: dq.i is incremented before calling deliver() because it might reenter deliverQueue()\n\t\t\tthis._deliver(listeners[dq.i++], dq.value as T);\n\t\t}\n\t\tdq.reset();\n\t}\n\n\t/**\n\t * To be kept private to fire an event to\n\t * subscribers\n\t */\n\tfire(event: T): void {\n\t\tif (this._deliveryQueue?.current) {\n\t\t\tthis._deliverQueue(this._deliveryQueue);\n\t\t\tthis._perfMon?.stop(); // last fire() will have starting perfmon, stop it before starting the next dispatch\n\t\t}\n\n\t\tthis._perfMon?.start(this._size);\n\n\t\tif (!this._listeners) {\n\t\t\t// no-op\n\t\t} else if (this._listeners instanceof UniqueContainer) {\n\t\t\tthis._deliver(this._listeners, event);\n\t\t} else {\n\t\t\tconst dq = this._deliveryQueue!;\n\t\t\tdq.enqueue(this, event, this._listeners.length);\n\t\t\tthis._deliverQueue(dq);\n\t\t}\n\n\t\tthis._perfMon?.stop();\n\t}\n\n\thasListeners(): boolean {\n\t\treturn this._size > 0;\n\t}\n}\n\nexport interface EventDeliveryQueue {\n\t_isEventDeliveryQueue: true;\n}\n\nexport const createEventDeliveryQueue = (): EventDeliveryQueue => new EventDeliveryQueuePrivate();\n\nclass EventDeliveryQueuePrivate implements EventDeliveryQueue {\n\tdeclare _isEventDeliveryQueue: true;\n\n\t/**\n\t * Index in current's listener list.\n\t */\n\tpublic i = -1;\n\n\t/**\n\t * The last index in the listener's list to deliver.\n\t */\n\tpublic end = 0;\n\n\t/**\n\t * Emitter currently being dispatched on. Emitter._listeners is always an array.\n\t */\n\tpublic current?: Emitter<any>;\n\t/**\n\t * Currently emitting value. Defined whenever `current` is.\n\t */\n\tpublic value?: unknown;\n\n\tpublic enqueue<T>(emitter: Emitter<T>, value: T, end: number) {\n\t\tthis.i = 0;\n\t\tthis.end = end;\n\t\tthis.current = emitter;\n\t\tthis.value = value;\n\t}\n\n\tpublic reset() {\n\t\tthis.i = this.end; // force any current emission loop to stop, mainly for during dispose\n\t\tthis.current = undefined;\n\t\tthis.value = undefined;\n\t}\n}\n\nexport interface IWaitUntil {\n\ttoken: CancellationToken;\n\twaitUntil(thenable: Promise<unknown>): void;\n}\n\nexport type IWaitUntilData<T> = Omit<Omit<T, 'waitUntil'>, 'token'>;\n\nexport class AsyncEmitter<T extends IWaitUntil> extends Emitter<T> {\n\n\tprivate _asyncDeliveryQueue?: LinkedList<[(ev: T) => void, IWaitUntilData<T>]>;\n\n\tasync fireAsync(data: IWaitUntilData<T>, token: CancellationToken, promiseJoin?: (p: Promise<unknown>, listener: Function) => Promise<unknown>): Promise<void> {\n\t\tif (!this._listeners) {\n\t\t\treturn;\n\t\t}\n\n\t\tif (!this._asyncDeliveryQueue) {\n\t\t\tthis._asyncDeliveryQueue = new LinkedList();\n\t\t}\n\n\t\tforEachListener(this._listeners, listener => this._asyncDeliveryQueue!.push([listener.value, data]));\n\n\t\twhile (this._asyncDeliveryQueue.size > 0 && !token.isCancellationRequested) {\n\n\t\t\tconst [listener, data] = this._asyncDeliveryQueue.shift()!;\n\t\t\tconst thenables: Promise<unknown>[] = [];\n\n\t\t\tconst event = <T>{\n\t\t\t\t...data,\n\t\t\t\ttoken,\n\t\t\t\twaitUntil: (p: Promise<unknown>): void => {\n\t\t\t\t\tif (Object.isFrozen(thenables)) {\n\t\t\t\t\t\tthrow new Error('waitUntil can NOT be called asynchronous');\n\t\t\t\t\t}\n\t\t\t\t\tif (promiseJoin) {\n\t\t\t\t\t\tp = promiseJoin(p, listener);\n\t\t\t\t\t}\n\t\t\t\t\tthenables.push(p);\n\t\t\t\t}\n\t\t\t};\n\n\t\t\ttry {\n\t\t\t\tlistener(event);\n\t\t\t} catch (e) {\n\t\t\t\tonUnexpectedError(e);\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// freeze thenables-collection to enforce sync-calls to\n\t\t\t// wait until and then wait for all thenables to resolve\n\t\t\tObject.freeze(thenables);\n\n\t\t\tawait Promise.allSettled(thenables).then(values => {\n\t\t\t\tfor (const value of values) {\n\t\t\t\t\tif (value.status === 'rejected') {\n\t\t\t\t\t\tonUnexpectedError(value.reason);\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t});\n\t\t}\n\t}\n}\n\n\nexport class PauseableEmitter<T> extends Emitter<T> {\n\n\tprivate _isPaused = 0;\n\tprotected _eventQueue = new LinkedList<T>();\n\tprivate _mergeFn?: (input: T[]) => T;\n\n\tpublic get isPaused(): boolean {\n\t\treturn this._isPaused !== 0;\n\t}\n\n\tconstructor(options?: EmitterOptions & { merge?: (input: T[]) => T }) {\n\t\tsuper(options);\n\t\tthis._mergeFn = options?.merge;\n\t}\n\n\tpause(): void {\n\t\tthis._isPaused++;\n\t}\n\n\tresume(): void {\n\t\tif (this._isPaused !== 0 && --this._isPaused === 0) {\n\t\t\tif (this._mergeFn) {\n\t\t\t\t// use the merge function to create a single composite\n\t\t\t\t// event. make a copy in case firing pauses this emitter\n\t\t\t\tif (this._eventQueue.size > 0) {\n\t\t\t\t\tconst events = Array.from(this._eventQueue);\n\t\t\t\t\tthis._eventQueue.clear();\n\t\t\t\t\tsuper.fire(this._mergeFn(events));\n\t\t\t\t}\n\n\t\t\t} else {\n\t\t\t\t// no merging, fire each event individually and test\n\t\t\t\t// that this emitter isn't paused halfway through\n\t\t\t\twhile (!this._isPaused && this._eventQueue.size !== 0) {\n\t\t\t\t\tsuper.fire(this._eventQueue.shift()!);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\toverride fire(event: T): void {\n\t\tif (this._size) {\n\t\t\tif (this._isPaused !== 0) {\n\t\t\t\tthis._eventQueue.push(event);\n\t\t\t} else {\n\t\t\t\tsuper.fire(event);\n\t\t\t}\n\t\t}\n\t}\n}\n\nexport class DebounceEmitter<T> extends PauseableEmitter<T> {\n\n\tprivate readonly _delay: number;\n\tprivate _handle: any | undefined;\n\n\tconstructor(options: EmitterOptions & { merge: (input: T[]) => T; delay?: number }) {\n\t\tsuper(options);\n\t\tthis._delay = options.delay ?? 100;\n\t}\n\n\toverride fire(event: T): void {\n\t\tif (!this._handle) {\n\t\t\tthis.pause();\n\t\t\tthis._handle = setTimeout(() => {\n\t\t\t\tthis._handle = undefined;\n\t\t\t\tthis.resume();\n\t\t\t}, this._delay);\n\t\t}\n\t\tsuper.fire(event);\n\t}\n}\n\n/**\n * An emitter which queue all events and then process them at the\n * end of the event loop.\n */\nexport class MicrotaskEmitter<T> extends Emitter<T> {\n\tprivate _queuedEvents: T[] = [];\n\tprivate _mergeFn?: (input: T[]) => T;\n\n\tconstructor(options?: EmitterOptions & { merge?: (input: T[]) => T }) {\n\t\tsuper(options);\n\t\tthis._mergeFn = options?.merge;\n\t}\n\toverride fire(event: T): void {\n\n\t\tif (!this.hasListeners()) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis._queuedEvents.push(event);\n\t\tif (this._queuedEvents.length === 1) {\n\t\t\tqueueMicrotask(() => {\n\t\t\t\tif (this._mergeFn) {\n\t\t\t\t\tsuper.fire(this._mergeFn(this._queuedEvents));\n\t\t\t\t} else {\n\t\t\t\t\tthis._queuedEvents.forEach(e => super.fire(e));\n\t\t\t\t}\n\t\t\t\tthis._queuedEvents = [];\n\t\t\t});\n\t\t}\n\t}\n}\n\n/**\n * An event emitter that multiplexes many events into a single event.\n *\n * @example Listen to the `onData` event of all `Thing`s, dynamically adding and removing `Thing`s\n * to the multiplexer as needed.\n *\n * ```typescript\n * const anythingDataMultiplexer = new EventMultiplexer<{ data: string }>();\n *\n * const thingListeners = DisposableMap<Thing, IDisposable>();\n *\n * thingService.onDidAddThing(thing => {\n *   thingListeners.set(thing, anythingDataMultiplexer.add(thing.onData);\n * });\n * thingService.onDidRemoveThing(thing => {\n *   thingListeners.deleteAndDispose(thing);\n * });\n *\n * anythingDataMultiplexer.event(e => {\n *   console.log('Something fired data ' + e.data)\n * });\n * ```\n */\nexport class EventMultiplexer<T> implements IDisposable {\n\n\tprivate readonly emitter: Emitter<T>;\n\tprivate hasListeners = false;\n\tprivate events: { event: Event<T>; listener: IDisposable | null }[] = [];\n\n\tconstructor() {\n\t\tthis.emitter = new Emitter<T>({\n\t\t\tonWillAddFirstListener: () => this.onFirstListenerAdd(),\n\t\t\tonDidRemoveLastListener: () => this.onLastListenerRemove()\n\t\t});\n\t}\n\n\tget event(): Event<T> {\n\t\treturn this.emitter.event;\n\t}\n\n\tadd(event: Event<T>): IDisposable {\n\t\tconst e = { event: event, listener: null };\n\t\tthis.events.push(e);\n\n\t\tif (this.hasListeners) {\n\t\t\tthis.hook(e);\n\t\t}\n\n\t\tconst dispose = () => {\n\t\t\tif (this.hasListeners) {\n\t\t\t\tthis.unhook(e);\n\t\t\t}\n\n\t\t\tconst idx = this.events.indexOf(e);\n\t\t\tthis.events.splice(idx, 1);\n\t\t};\n\n\t\treturn toDisposable(createSingleCallFunction(dispose));\n\t}\n\n\tprivate onFirstListenerAdd(): void {\n\t\tthis.hasListeners = true;\n\t\tthis.events.forEach(e => this.hook(e));\n\t}\n\n\tprivate onLastListenerRemove(): void {\n\t\tthis.hasListeners = false;\n\t\tthis.events.forEach(e => this.unhook(e));\n\t}\n\n\tprivate hook(e: { event: Event<T>; listener: IDisposable | null }): void {\n\t\te.listener = e.event(r => this.emitter.fire(r));\n\t}\n\n\tprivate unhook(e: { event: Event<T>; listener: IDisposable | null }): void {\n\t\te.listener?.dispose();\n\t\te.listener = null;\n\t}\n\n\tdispose(): void {\n\t\tthis.emitter.dispose();\n\n\t\tfor (const e of this.events) {\n\t\t\te.listener?.dispose();\n\t\t}\n\t\tthis.events = [];\n\t}\n}\n\nexport interface IDynamicListEventMultiplexer<TEventType> extends IDisposable {\n\treadonly event: Event<TEventType>;\n}\nexport class DynamicListEventMultiplexer<TItem, TEventType> implements IDynamicListEventMultiplexer<TEventType> {\n\tprivate readonly _store = new DisposableStore();\n\n\treadonly event: Event<TEventType>;\n\n\tconstructor(\n\t\titems: TItem[],\n\t\tonAddItem: Event<TItem>,\n\t\tonRemoveItem: Event<TItem>,\n\t\tgetEvent: (item: TItem) => Event<TEventType>\n\t) {\n\t\tconst multiplexer = this._store.add(new EventMultiplexer<TEventType>());\n\t\tconst itemListeners = this._store.add(new DisposableMap<TItem, IDisposable>());\n\n\t\tfunction addItem(instance: TItem) {\n\t\t\titemListeners.set(instance, multiplexer.add(getEvent(instance)));\n\t\t}\n\n\t\t// Existing items\n\t\tfor (const instance of items) {\n\t\t\taddItem(instance);\n\t\t}\n\n\t\t// Added items\n\t\tthis._store.add(onAddItem(instance => {\n\t\t\taddItem(instance);\n\t\t}));\n\n\t\t// Removed items\n\t\tthis._store.add(onRemoveItem(instance => {\n\t\t\titemListeners.deleteAndDispose(instance);\n\t\t}));\n\n\t\tthis.event = multiplexer.event;\n\t}\n\n\tdispose() {\n\t\tthis._store.dispose();\n\t}\n}\n\n/**\n * The EventBufferer is useful in situations in which you want\n * to delay firing your events during some code.\n * You can wrap that code and be sure that the event will not\n * be fired during that wrap.\n *\n * ```\n * const emitter: Emitter;\n * const delayer = new EventDelayer();\n * const delayedEvent = delayer.wrapEvent(emitter.event);\n *\n * delayedEvent(console.log);\n *\n * delayer.bufferEvents(() => {\n *   emitter.fire(); // event will not be fired yet\n * });\n *\n * // event will only be fired at this point\n * ```\n */\nexport class EventBufferer {\n\n\tprivate data: { buffers: Function[] }[] = [];\n\n\twrapEvent<T>(event: Event<T>): Event<T>;\n\twrapEvent<T>(event: Event<T>, reduce: (last: T | undefined, event: T) => T): Event<T>;\n\twrapEvent<T, O>(event: Event<T>, reduce: (last: O | undefined, event: T) => O, initial: O): Event<O>;\n\twrapEvent<T, O>(event: Event<T>, reduce?: (last: T | O | undefined, event: T) => T | O, initial?: O): Event<O | T> {\n\t\treturn (listener, thisArgs?, disposables?) => {\n\t\t\treturn event(i => {\n\t\t\t\tconst data = this.data[this.data.length - 1];\n\n\t\t\t\t// Non-reduce scenario\n\t\t\t\tif (!reduce) {\n\t\t\t\t\t// Buffering case\n\t\t\t\t\tif (data) {\n\t\t\t\t\t\tdata.buffers.push(() => listener.call(thisArgs, i));\n\t\t\t\t\t} else {\n\t\t\t\t\t\t// Not buffering case\n\t\t\t\t\t\tlistener.call(thisArgs, i);\n\t\t\t\t\t}\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\t// Reduce scenario\n\t\t\t\tconst reduceData = data as typeof data & {\n\t\t\t\t\t/**\n\t\t\t\t\t * The accumulated items that will be reduced.\n\t\t\t\t\t */\n\t\t\t\t\titems?: T[];\n\t\t\t\t\t/**\n\t\t\t\t\t * The reduced result cached to be shared with other listeners.\n\t\t\t\t\t */\n\t\t\t\t\treducedResult?: T | O;\n\t\t\t\t};\n\n\t\t\t\t// Not buffering case\n\t\t\t\tif (!reduceData) {\n\t\t\t\t\t// TODO: Is there a way to cache this reduce call for all listeners?\n\t\t\t\t\tlistener.call(thisArgs, reduce(initial, i));\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\t// Buffering case\n\t\t\t\treduceData.items ??= [];\n\t\t\t\treduceData.items.push(i);\n\t\t\t\tif (reduceData.buffers.length === 0) {\n\t\t\t\t\t// Include a single buffered function that will reduce all events when we're done buffering events\n\t\t\t\t\tdata.buffers.push(() => {\n\t\t\t\t\t\t// cache the reduced result so that the value can be shared across all listeners\n\t\t\t\t\t\treduceData.reducedResult ??= initial\n\t\t\t\t\t\t\t? reduceData.items!.reduce(reduce as (last: O | undefined, event: T) => O, initial)\n\t\t\t\t\t\t\t: reduceData.items!.reduce(reduce as (last: T | undefined, event: T) => T);\n\t\t\t\t\t\tlistener.call(thisArgs, reduceData.reducedResult);\n\t\t\t\t\t});\n\t\t\t\t}\n\t\t\t}, undefined, disposables);\n\t\t};\n\t}\n\n\tbufferEvents<R = void>(fn: () => R): R {\n\t\tconst data = { buffers: new Array<Function>() };\n\t\tthis.data.push(data);\n\t\tconst r = fn();\n\t\tthis.data.pop();\n\t\tdata.buffers.forEach(flush => flush());\n\t\treturn r;\n\t}\n}\n\n/**\n * A Relay is an event forwarder which functions as a replugabble event pipe.\n * Once created, you can connect an input event to it and it will simply forward\n * events from that input event through its own `event` property. The `input`\n * can be changed at any point in time.\n */\nexport class Relay<T> implements IDisposable {\n\n\tprivate listening = false;\n\tprivate inputEvent: Event<T> = Event.None;\n\tprivate inputEventListener: IDisposable = Disposable.None;\n\n\tprivate readonly emitter = new Emitter<T>({\n\t\tonDidAddFirstListener: () => {\n\t\t\tthis.listening = true;\n\t\t\tthis.inputEventListener = this.inputEvent(this.emitter.fire, this.emitter);\n\t\t},\n\t\tonDidRemoveLastListener: () => {\n\t\t\tthis.listening = false;\n\t\t\tthis.inputEventListener.dispose();\n\t\t}\n\t});\n\n\treadonly event: Event<T> = this.emitter.event;\n\n\tset input(event: Event<T>) {\n\t\tthis.inputEvent = event;\n\n\t\tif (this.listening) {\n\t\t\tthis.inputEventListener.dispose();\n\t\t\tthis.inputEventListener = event(this.emitter.fire, this.emitter);\n\t\t}\n\t}\n\n\tdispose() {\n\t\tthis.inputEventListener.dispose();\n\t\tthis.emitter.dispose();\n\t}\n}\n\nexport interface IValueWithChangeEvent<T> {\n\treadonly onDidChange: Event<void>;\n\tget value(): T;\n}\n\nexport class ValueWithChangeEvent<T> implements IValueWithChangeEvent<T> {\n\tpublic static const<T>(value: T): IValueWithChangeEvent<T> {\n\t\treturn new ConstValueWithChangeEvent(value);\n\t}\n\n\tprivate readonly _onDidChange = new Emitter<void>();\n\treadonly onDidChange: Event<void> = this._onDidChange.event;\n\n\tconstructor(private _value: T) { }\n\n\tget value(): T {\n\t\treturn this._value;\n\t}\n\n\tset value(value: T) {\n\t\tif (value !== this._value) {\n\t\t\tthis._value = value;\n\t\t\tthis._onDidChange.fire(undefined);\n\t\t}\n\t}\n}\n\nclass ConstValueWithChangeEvent<T> implements IValueWithChangeEvent<T> {\n\tpublic readonly onDidChange: Event<void> = Event.None;\n\n\tconstructor(readonly value: T) { }\n}\n", "/**\n * Copyright (c) 2021 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { IBuffer as IBufferApi, IBufferNamespace as IBufferNamespaceApi } from '@xterm/xterm';\nimport { BufferApiView } from 'common/public/BufferApiView';\nimport { ICoreTerminal } from 'common/Types';\nimport { Disposable } from 'vs/base/common/lifecycle';\nimport { Emitter } from 'vs/base/common/event';\n\nexport class BufferNamespaceApi extends Disposable implements IBufferNamespaceApi {\n  private _normal: BufferApiView;\n  private _alternate: BufferApiView;\n\n  private readonly _onBufferChange = this._register(new Emitter<IBufferApi>());\n  public readonly onBufferChange = this._onBufferChange.event;\n\n  constructor(private _core: ICoreTerminal) {\n    super();\n    this._normal = new BufferApiView(this._core.buffers.normal, 'normal');\n    this._alternate = new BufferApiView(this._core.buffers.alt, 'alternate');\n    this._core.buffers.onBufferActivate(() => this._onBufferChange.fire(this.active));\n  }\n  public get active(): IBufferApi {\n    if (this._core.buffers.active === this._core.buffers.normal) { return this.normal; }\n    if (this._core.buffers.active === this._core.buffers.alt) { return this.alternate; }\n    throw new Error('Active buffer is neither normal nor alternate');\n  }\n  public get normal(): IBufferApi {\n    return this._normal.init(this._core.buffers.normal);\n  }\n  public get alternate(): IBufferApi {\n    return this._alternate.init(this._core.buffers.alt);\n  }\n}\n", "/**\n * Copyright (c) 2021 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { IParams } from 'common/parser/Types';\nimport { IDisposable, IFunctionIdentifier, IParser } from '@xterm/xterm';\nimport { ICoreTerminal } from 'common/Types';\n\nexport class ParserApi implements IParser {\n  constructor(private _core: ICoreTerminal) { }\n\n  public registerCsiHandler(id: IFunctionIdentifier, callback: (params: (number | number[])[]) => boolean | Promise<boolean>): IDisposable {\n    return this._core.registerCsiHandler(id, (params: IParams) => callback(params.toArray()));\n  }\n  public addCsiHandler(id: IFunctionIdentifier, callback: (params: (number | number[])[]) => boolean | Promise<boolean>): IDisposable {\n    return this.registerCsiHandler(id, callback);\n  }\n  public registerDcsHandler(id: IFunctionIdentifier, callback: (data: string, param: (number | number[])[]) => boolean | Promise<boolean>): IDisposable {\n    return this._core.registerDcsHandler(id, (data: string, params: IParams) => callback(data, params.toArray()));\n  }\n  public addDcsHandler(id: IFunctionIdentifier, callback: (data: string, param: (number | number[])[]) => boolean | Promise<boolean>): IDisposable {\n    return this.registerDcsHandler(id, callback);\n  }\n  public registerEscHandler(id: IFunctionIdentifier, handler: () => boolean | Promise<boolean>): IDisposable {\n    return this._core.registerEscHandler(id, handler);\n  }\n  public addEscHandler(id: IFunctionIdentifier, handler: () => boolean | Promise<boolean>): IDisposable {\n    return this.registerEscHandler(id, handler);\n  }\n  public registerOscHandler(ident: number, callback: (data: string) => boolean | Promise<boolean>): IDisposable {\n    return this._core.registerOscHandler(ident, callback);\n  }\n  public addOscHandler(ident: number, callback: (data: string) => boolean | Promise<boolean>): IDisposable {\n    return this.registerOscHandler(ident, callback);\n  }\n}\n", "/**\n * Copyright (c) 2021 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { ICoreTerminal } from 'common/Types';\nimport { IUnicodeHandling, IUnicodeVersionProvider } from '@xterm/xterm';\n\nexport class UnicodeApi implements IUnicodeHandling {\n  constructor(private _core: ICoreTerminal) { }\n\n  public register(provider: IUnicodeVersionProvider): void {\n    this._core.unicodeService.register(provider);\n  }\n\n  public get versions(): string[] {\n    return this._core.unicodeService.versions;\n  }\n\n  public get activeVersion(): string {\n    return this._core.unicodeService.activeVersion;\n  }\n\n  public set activeVersion(version: string) {\n    this._core.unicodeService.activeVersion = version;\n  }\n}\n", "/**\n * Copyright (c) 2018 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { CharData, IAttributeData, IBufferLine, ICellData, IExtendedAttrs } from 'common/Types';\nimport { AttributeData } from 'common/buffer/AttributeData';\nimport { CellData } from 'common/buffer/CellData';\nimport { Attributes, BgFlags, CHAR_DATA_ATTR_INDEX, CHAR_DATA_CHAR_INDEX, CHAR_DATA_WIDTH_INDEX, Content, NULL_CELL_CHAR, NULL_CELL_CODE, NULL_CELL_WIDTH, WHITESPACE_CELL_CHAR } from 'common/buffer/Constants';\nimport { stringFromCodePoint } from 'common/input/TextDecoder';\n\n/**\n * buffer memory layout:\n *\n *   |             uint32_t             |        uint32_t         |        uint32_t         |\n *   |             `content`            |          `FG`           |          `BG`           |\n *   | wcwidth(2) comb(1) codepoint(21) | flags(8) R(8) G(8) B(8) | flags(8) R(8) G(8) B(8) |\n */\n\n\n/** typed array slots taken by one cell */\nconst CELL_SIZE = 3;\n\n/**\n * Cell member indices.\n *\n * Direct access:\n *    `content = data[column * CELL_SIZE + Cell.CONTENT];`\n *    `fg = data[column * CELL_SIZE + Cell.FG];`\n *    `bg = data[column * CELL_SIZE + Cell.BG];`\n */\nconst enum Cell {\n  CONTENT = 0,\n  FG = 1, // currently simply holds all known attrs\n  BG = 2  // currently unused\n}\n\nexport const DEFAULT_ATTR_DATA = Object.freeze(new AttributeData());\n\n// Work variables to avoid garbage collection\nlet $startIndex = 0;\n\n/** Factor when to cleanup underlying array buffer after shrinking. */\nconst CLEANUP_THRESHOLD = 2;\n\n/**\n * Typed array based bufferline implementation.\n *\n * There are 2 ways to insert data into the cell buffer:\n * - `setCellFromCodepoint` + `addCodepointToCell`\n *   Use these for data that is already UTF32.\n *   Used during normal input in `InputHandler` for faster buffer access.\n * - `setCell`\n *   This method takes a CellData object and stores the data in the buffer.\n *   Use `CellData.fromCharData` to create the CellData object (e.g. from JS string).\n *\n * To retrieve data from the buffer use either one of the primitive methods\n * (if only one particular value is needed) or `loadCell`. For `loadCell` in a loop\n * memory allocs / GC pressure can be greatly reduced by reusing the CellData object.\n */\nexport class BufferLine implements IBufferLine {\n  protected _data: Uint32Array;\n  protected _combined: {[index: number]: string} = {};\n  protected _extendedAttrs: {[index: number]: IExtendedAttrs | undefined} = {};\n  public length: number;\n\n  constructor(cols: number, fillCellData?: ICellData, public isWrapped: boolean = false) {\n    this._data = new Uint32Array(cols * CELL_SIZE);\n    const cell = fillCellData || CellData.fromCharData([0, NULL_CELL_CHAR, NULL_CELL_WIDTH, NULL_CELL_CODE]);\n    for (let i = 0; i < cols; ++i) {\n      this.setCell(i, cell);\n    }\n    this.length = cols;\n  }\n\n  /**\n   * Get cell data CharData.\n   * @deprecated\n   */\n  public get(index: number): CharData {\n    const content = this._data[index * CELL_SIZE + Cell.CONTENT];\n    const cp = content & Content.CODEPOINT_MASK;\n    return [\n      this._data[index * CELL_SIZE + Cell.FG],\n      (content & Content.IS_COMBINED_MASK)\n        ? this._combined[index]\n        : (cp) ? stringFromCodePoint(cp) : '',\n      content >> Content.WIDTH_SHIFT,\n      (content & Content.IS_COMBINED_MASK)\n        ? this._combined[index].charCodeAt(this._combined[index].length - 1)\n        : cp\n    ];\n  }\n\n  /**\n   * Set cell data from CharData.\n   * @deprecated\n   */\n  public set(index: number, value: CharData): void {\n    this._data[index * CELL_SIZE + Cell.FG] = value[CHAR_DATA_ATTR_INDEX];\n    if (value[CHAR_DATA_CHAR_INDEX].length > 1) {\n      this._combined[index] = value[1];\n      this._data[index * CELL_SIZE + Cell.CONTENT] = index | Content.IS_COMBINED_MASK | (value[CHAR_DATA_WIDTH_INDEX] << Content.WIDTH_SHIFT);\n    } else {\n      this._data[index * CELL_SIZE + Cell.CONTENT] = value[CHAR_DATA_CHAR_INDEX].charCodeAt(0) | (value[CHAR_DATA_WIDTH_INDEX] << Content.WIDTH_SHIFT);\n    }\n  }\n\n  /**\n   * primitive getters\n   * use these when only one value is needed, otherwise use `loadCell`\n   */\n  public getWidth(index: number): number {\n    return this._data[index * CELL_SIZE + Cell.CONTENT] >> Content.WIDTH_SHIFT;\n  }\n\n  /** Test whether content has width. */\n  public hasWidth(index: number): number {\n    return this._data[index * CELL_SIZE + Cell.CONTENT] & Content.WIDTH_MASK;\n  }\n\n  /** Get FG cell component. */\n  public getFg(index: number): number {\n    return this._data[index * CELL_SIZE + Cell.FG];\n  }\n\n  /** Get BG cell component. */\n  public getBg(index: number): number {\n    return this._data[index * CELL_SIZE + Cell.BG];\n  }\n\n  /**\n   * Test whether contains any chars.\n   * Basically an empty has no content, but other cells might differ in FG/BG\n   * from real empty cells.\n   */\n  public hasContent(index: number): number {\n    return this._data[index * CELL_SIZE + Cell.CONTENT] & Content.HAS_CONTENT_MASK;\n  }\n\n  /**\n   * Get codepoint of the cell.\n   * To be in line with `code` in CharData this either returns\n   * a single UTF32 codepoint or the last codepoint of a combined string.\n   */\n  public getCodePoint(index: number): number {\n    const content = this._data[index * CELL_SIZE + Cell.CONTENT];\n    if (content & Content.IS_COMBINED_MASK) {\n      return this._combined[index].charCodeAt(this._combined[index].length - 1);\n    }\n    return content & Content.CODEPOINT_MASK;\n  }\n\n  /** Test whether the cell contains a combined string. */\n  public isCombined(index: number): number {\n    return this._data[index * CELL_SIZE + Cell.CONTENT] & Content.IS_COMBINED_MASK;\n  }\n\n  /** Returns the string content of the cell. */\n  public getString(index: number): string {\n    const content = this._data[index * CELL_SIZE + Cell.CONTENT];\n    if (content & Content.IS_COMBINED_MASK) {\n      return this._combined[index];\n    }\n    if (content & Content.CODEPOINT_MASK) {\n      return stringFromCodePoint(content & Content.CODEPOINT_MASK);\n    }\n    // return empty string for empty cells\n    return '';\n  }\n\n  /** Get state of protected flag. */\n  public isProtected(index: number): number {\n    return this._data[index * CELL_SIZE + Cell.BG] & BgFlags.PROTECTED;\n  }\n\n  /**\n   * Load data at `index` into `cell`. This is used to access cells in a way that's more friendly\n   * to GC as it significantly reduced the amount of new objects/references needed.\n   */\n  public loadCell(index: number, cell: ICellData): ICellData {\n    $startIndex = index * CELL_SIZE;\n    cell.content = this._data[$startIndex + Cell.CONTENT];\n    cell.fg = this._data[$startIndex + Cell.FG];\n    cell.bg = this._data[$startIndex + Cell.BG];\n    if (cell.content & Content.IS_COMBINED_MASK) {\n      cell.combinedData = this._combined[index];\n    }\n    if (cell.bg & BgFlags.HAS_EXTENDED) {\n      cell.extended = this._extendedAttrs[index]!;\n    }\n    return cell;\n  }\n\n  /**\n   * Set data at `index` to `cell`.\n   */\n  public setCell(index: number, cell: ICellData): void {\n    if (cell.content & Content.IS_COMBINED_MASK) {\n      this._combined[index] = cell.combinedData;\n    }\n    if (cell.bg & BgFlags.HAS_EXTENDED) {\n      this._extendedAttrs[index] = cell.extended;\n    }\n    this._data[index * CELL_SIZE + Cell.CONTENT] = cell.content;\n    this._data[index * CELL_SIZE + Cell.FG] = cell.fg;\n    this._data[index * CELL_SIZE + Cell.BG] = cell.bg;\n  }\n\n  /**\n   * Set cell data from input handler.\n   * Since the input handler see the incoming chars as UTF32 codepoints,\n   * it gets an optimized access method.\n   */\n  public setCellFromCodepoint(index: number, codePoint: number, width: number, attrs: IAttributeData): void {\n    if (attrs.bg & BgFlags.HAS_EXTENDED) {\n      this._extendedAttrs[index] = attrs.extended;\n    }\n    this._data[index * CELL_SIZE + Cell.CONTENT] = codePoint | (width << Content.WIDTH_SHIFT);\n    this._data[index * CELL_SIZE + Cell.FG] = attrs.fg;\n    this._data[index * CELL_SIZE + Cell.BG] = attrs.bg;\n  }\n\n  /**\n   * Add a codepoint to a cell from input handler.\n   * During input stage combining chars with a width of 0 follow and stack\n   * onto a leading char. Since we already set the attrs\n   * by the previous `setDataFromCodePoint` call, we can omit it here.\n   */\n  public addCodepointToCell(index: number, codePoint: number, width: number): void {\n    let content = this._data[index * CELL_SIZE + Cell.CONTENT];\n    if (content & Content.IS_COMBINED_MASK) {\n      // we already have a combined string, simply add\n      this._combined[index] += stringFromCodePoint(codePoint);\n    } else {\n      if (content & Content.CODEPOINT_MASK) {\n        // normal case for combining chars:\n        //  - move current leading char + new one into combined string\n        //  - set combined flag\n        this._combined[index] = stringFromCodePoint(content & Content.CODEPOINT_MASK) + stringFromCodePoint(codePoint);\n        content &= ~Content.CODEPOINT_MASK; // set codepoint in buffer to 0\n        content |= Content.IS_COMBINED_MASK;\n      } else {\n        // should not happen - we actually have no data in the cell yet\n        // simply set the data in the cell buffer with a width of 1\n        content = codePoint | (1 << Content.WIDTH_SHIFT);\n      }\n    }\n    if (width) {\n      content &= ~Content.WIDTH_MASK;\n      content |= width << Content.WIDTH_SHIFT;\n    }\n    this._data[index * CELL_SIZE + Cell.CONTENT] = content;\n  }\n\n  public insertCells(pos: number, n: number, fillCellData: ICellData): void {\n    pos %= this.length;\n\n    // handle fullwidth at pos: reset cell one to the left if pos is second cell of a wide char\n    if (pos && this.getWidth(pos - 1) === 2) {\n      this.setCellFromCodepoint(pos - 1, 0, 1, fillCellData);\n    }\n\n    if (n < this.length - pos) {\n      const cell = new CellData();\n      for (let i = this.length - pos - n - 1; i >= 0; --i) {\n        this.setCell(pos + n + i, this.loadCell(pos + i, cell));\n      }\n      for (let i = 0; i < n; ++i) {\n        this.setCell(pos + i, fillCellData);\n      }\n    } else {\n      for (let i = pos; i < this.length; ++i) {\n        this.setCell(i, fillCellData);\n      }\n    }\n\n    // handle fullwidth at line end: reset last cell if it is first cell of a wide char\n    if (this.getWidth(this.length - 1) === 2) {\n      this.setCellFromCodepoint(this.length - 1, 0, 1, fillCellData);\n    }\n  }\n\n  public deleteCells(pos: number, n: number, fillCellData: ICellData): void {\n    pos %= this.length;\n    if (n < this.length - pos) {\n      const cell = new CellData();\n      for (let i = 0; i < this.length - pos - n; ++i) {\n        this.setCell(pos + i, this.loadCell(pos + n + i, cell));\n      }\n      for (let i = this.length - n; i < this.length; ++i) {\n        this.setCell(i, fillCellData);\n      }\n    } else {\n      for (let i = pos; i < this.length; ++i) {\n        this.setCell(i, fillCellData);\n      }\n    }\n\n    // handle fullwidth at pos:\n    // - reset pos-1 if wide char\n    // - reset pos if width==0 (previous second cell of a wide char)\n    if (pos && this.getWidth(pos - 1) === 2) {\n      this.setCellFromCodepoint(pos - 1, 0, 1, fillCellData);\n    }\n    if (this.getWidth(pos) === 0 && !this.hasContent(pos)) {\n      this.setCellFromCodepoint(pos, 0, 1, fillCellData);\n    }\n  }\n\n  public replaceCells(start: number, end: number, fillCellData: ICellData, respectProtect: boolean = false): void {\n    // full branching on respectProtect==true, hopefully getting fast JIT for standard case\n    if (respectProtect) {\n      if (start && this.getWidth(start - 1) === 2 && !this.isProtected(start - 1)) {\n        this.setCellFromCodepoint(start - 1, 0, 1, fillCellData);\n      }\n      if (end < this.length && this.getWidth(end - 1) === 2 && !this.isProtected(end)) {\n        this.setCellFromCodepoint(end, 0, 1, fillCellData);\n      }\n      while (start < end  && start < this.length) {\n        if (!this.isProtected(start)) {\n          this.setCell(start, fillCellData);\n        }\n        start++;\n      }\n      return;\n    }\n\n    // handle fullwidth at start: reset cell one to the left if start is second cell of a wide char\n    if (start && this.getWidth(start - 1) === 2) {\n      this.setCellFromCodepoint(start - 1, 0, 1, fillCellData);\n    }\n    // handle fullwidth at last cell + 1: reset to empty cell if it is second part of a wide char\n    if (end < this.length && this.getWidth(end - 1) === 2) {\n      this.setCellFromCodepoint(end, 0, 1, fillCellData);\n    }\n\n    while (start < end  && start < this.length) {\n      this.setCell(start++, fillCellData);\n    }\n  }\n\n  /**\n   * Resize BufferLine to `cols` filling excess cells with `fillCellData`.\n   * The underlying array buffer will not change if there is still enough space\n   * to hold the new buffer line data.\n   * Returns a boolean indicating, whether a `cleanupMemory` call would free\n   * excess memory (true after shrinking > CLEANUP_THRESHOLD).\n   */\n  public resize(cols: number, fillCellData: ICellData): boolean {\n    if (cols === this.length) {\n      return this._data.length * 4 * CLEANUP_THRESHOLD < this._data.buffer.byteLength;\n    }\n    const uint32Cells = cols * CELL_SIZE;\n    if (cols > this.length) {\n      if (this._data.buffer.byteLength >= uint32Cells * 4) {\n        // optimization: avoid alloc and data copy if buffer has enough room\n        this._data = new Uint32Array(this._data.buffer, 0, uint32Cells);\n      } else {\n        // slow path: new alloc and full data copy\n        const data = new Uint32Array(uint32Cells);\n        data.set(this._data);\n        this._data = data;\n      }\n      for (let i = this.length; i < cols; ++i) {\n        this.setCell(i, fillCellData);\n      }\n    } else {\n      // optimization: just shrink the view on existing buffer\n      this._data = this._data.subarray(0, uint32Cells);\n      // Remove any cut off combined data\n      const keys = Object.keys(this._combined);\n      for (let i = 0; i < keys.length; i++) {\n        const key = parseInt(keys[i], 10);\n        if (key >= cols) {\n          delete this._combined[key];\n        }\n      }\n      // remove any cut off extended attributes\n      const extKeys = Object.keys(this._extendedAttrs);\n      for (let i = 0; i < extKeys.length; i++) {\n        const key = parseInt(extKeys[i], 10);\n        if (key >= cols) {\n          delete this._extendedAttrs[key];\n        }\n      }\n    }\n    this.length = cols;\n    return uint32Cells * 4 * CLEANUP_THRESHOLD < this._data.buffer.byteLength;\n  }\n\n  /**\n   * Cleanup underlying array buffer.\n   * A cleanup will be triggered if the array buffer exceeds the actual used\n   * memory by a factor of CLEANUP_THRESHOLD.\n   * Returns 0 or 1 indicating whether a cleanup happened.\n   */\n  public cleanupMemory(): number {\n    if (this._data.length * 4 * CLEANUP_THRESHOLD < this._data.buffer.byteLength) {\n      const data = new Uint32Array(this._data.length);\n      data.set(this._data);\n      this._data = data;\n      return 1;\n    }\n    return 0;\n  }\n\n  /** fill a line with fillCharData */\n  public fill(fillCellData: ICellData, respectProtect: boolean = false): void {\n    // full branching on respectProtect==true, hopefully getting fast JIT for standard case\n    if (respectProtect) {\n      for (let i = 0; i < this.length; ++i) {\n        if (!this.isProtected(i)) {\n          this.setCell(i, fillCellData);\n        }\n      }\n      return;\n    }\n    this._combined = {};\n    this._extendedAttrs = {};\n    for (let i = 0; i < this.length; ++i) {\n      this.setCell(i, fillCellData);\n    }\n  }\n\n  /** alter to a full copy of line  */\n  public copyFrom(line: BufferLine): void {\n    if (this.length !== line.length) {\n      this._data = new Uint32Array(line._data);\n    } else {\n      // use high speed copy if lengths are equal\n      this._data.set(line._data);\n    }\n    this.length = line.length;\n    this._combined = {};\n    for (const el in line._combined) {\n      this._combined[el] = line._combined[el];\n    }\n    this._extendedAttrs = {};\n    for (const el in line._extendedAttrs) {\n      this._extendedAttrs[el] = line._extendedAttrs[el];\n    }\n    this.isWrapped = line.isWrapped;\n  }\n\n  /** create a new clone */\n  public clone(): IBufferLine {\n    const newLine = new BufferLine(0);\n    newLine._data = new Uint32Array(this._data);\n    newLine.length = this.length;\n    for (const el in this._combined) {\n      newLine._combined[el] = this._combined[el];\n    }\n    for (const el in this._extendedAttrs) {\n      newLine._extendedAttrs[el] = this._extendedAttrs[el];\n    }\n    newLine.isWrapped = this.isWrapped;\n    return newLine;\n  }\n\n  public getTrimmedLength(): number {\n    for (let i = this.length - 1; i >= 0; --i) {\n      if ((this._data[i * CELL_SIZE + Cell.CONTENT] & Content.HAS_CONTENT_MASK)) {\n        return i + (this._data[i * CELL_SIZE + Cell.CONTENT] >> Content.WIDTH_SHIFT);\n      }\n    }\n    return 0;\n  }\n\n  public getNoBgTrimmedLength(): number {\n    for (let i = this.length - 1; i >= 0; --i) {\n      if ((this._data[i * CELL_SIZE + Cell.CONTENT] & Content.HAS_CONTENT_MASK) || (this._data[i * CELL_SIZE + Cell.BG] & Attributes.CM_MASK)) {\n        return i + (this._data[i * CELL_SIZE + Cell.CONTENT] >> Content.WIDTH_SHIFT);\n      }\n    }\n    return 0;\n  }\n\n  public copyCellsFrom(src: BufferLine, srcCol: number, destCol: number, length: number, applyInReverse: boolean): void {\n    const srcData = src._data;\n    if (applyInReverse) {\n      for (let cell = length - 1; cell >= 0; cell--) {\n        for (let i = 0; i < CELL_SIZE; i++) {\n          this._data[(destCol + cell) * CELL_SIZE + i] = srcData[(srcCol + cell) * CELL_SIZE + i];\n        }\n        if (srcData[(srcCol + cell) * CELL_SIZE + Cell.BG] & BgFlags.HAS_EXTENDED) {\n          this._extendedAttrs[destCol + cell] = src._extendedAttrs[srcCol + cell];\n        }\n      }\n    } else {\n      for (let cell = 0; cell < length; cell++) {\n        for (let i = 0; i < CELL_SIZE; i++) {\n          this._data[(destCol + cell) * CELL_SIZE + i] = srcData[(srcCol + cell) * CELL_SIZE + i];\n        }\n        if (srcData[(srcCol + cell) * CELL_SIZE + Cell.BG] & BgFlags.HAS_EXTENDED) {\n          this._extendedAttrs[destCol + cell] = src._extendedAttrs[srcCol + cell];\n        }\n      }\n    }\n\n    // Move any combined data over as needed, FIXME: repeat for extended attrs\n    const srcCombinedKeys = Object.keys(src._combined);\n    for (let i = 0; i < srcCombinedKeys.length; i++) {\n      const key = parseInt(srcCombinedKeys[i], 10);\n      if (key >= srcCol) {\n        this._combined[key - srcCol + destCol] = src._combined[key];\n      }\n    }\n  }\n\n  /**\n   * Translates the buffer line to a string.\n   *\n   * @param trimRight Whether to trim any empty cells on the right.\n   * @param startCol The column to start the string (0-based inclusive).\n   * @param endCol The column to end the string (0-based exclusive).\n   * @param outColumns if specified, this array will be filled with column numbers such that\n   * `returnedString[i]` is displayed at `outColumns[i]` column. `outColumns[returnedString.length]`\n   * is where the character following `returnedString` will be displayed.\n   *\n   * When a single cell is translated to multiple UTF-16 code units (e.g. surrogate pair) in the\n   * returned string, the corresponding entries in `outColumns` will have the same column number.\n   */\n  public translateToString(trimRight?: boolean, startCol?: number, endCol?: number, outColumns?: number[]): string {\n    startCol = startCol ?? 0;\n    endCol = endCol ?? this.length;\n    if (trimRight) {\n      endCol = Math.min(endCol, this.getTrimmedLength());\n    }\n    if (outColumns) {\n      outColumns.length = 0;\n    }\n    let result = '';\n    while (startCol < endCol) {\n      const content = this._data[startCol * CELL_SIZE + Cell.CONTENT];\n      const cp = content & Content.CODEPOINT_MASK;\n      const chars = (content & Content.IS_COMBINED_MASK) ? this._combined[startCol] : (cp) ? stringFromCodePoint(cp) : WHITESPACE_CELL_CHAR;\n      result += chars;\n      if (outColumns) {\n        for (let i = 0; i < chars.length; ++i) {\n          outColumns.push(startCol);\n        }\n      }\n      startCol += (content >> Content.WIDTH_SHIFT) || 1; // always advance by at least 1\n    }\n    if (outColumns) {\n      outColumns.push(startCol);\n    }\n    return result;\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n *\n * This was heavily inspired from microsoft/vscode's dependency injection system (MIT).\n */\n/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\nimport { IServiceIdentifier } from 'common/services/Services';\n\nconst DI_TARGET = 'di$target';\nconst DI_DEPENDENCIES = 'di$dependencies';\n\nexport const serviceRegistry: Map<string, IServiceIdentifier<any>> = new Map();\n\nexport function getServiceDependencies(ctor: any): { id: IServiceIdentifier<any>, index: number, optional: boolean }[] {\n  return ctor[DI_DEPENDENCIES] || [];\n}\n\nexport function createDecorator<T>(id: string): IServiceIdentifier<T> {\n  if (serviceRegistry.has(id)) {\n    return serviceRegistry.get(id)!;\n  }\n\n  const decorator: any = function (target: Function, key: string, index: number): any {\n    if (arguments.length !== 3) {\n      throw new Error('@IServiceName-decorator can only be used to decorate a parameter');\n    }\n\n    storeServiceDependency(decorator, target, index);\n  };\n\n  decorator._id = id;\n\n  serviceRegistry.set(id, decorator);\n  return decorator;\n}\n\nfunction storeServiceDependency(id: Function, target: Function, index: number): void {\n  if ((target as any)[DI_TARGET] === target) {\n    (target as any)[DI_DEPENDENCIES].push({ id, index });\n  } else {\n    (target as any)[DI_DEPENDENCIES] = [{ id, index }];\n    (target as any)[DI_TARGET] = target;\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { IDecoration, IDecorationOptions, ILinkHandler, ILogger, IWindowsPty, type IOverviewRulerOptions } from '@xterm/xterm';\nimport { CoreMouseEncoding, CoreMouseEventType, CursorInactiveStyle, CursorStyle, IAttributeData, ICharset, IColor, ICoreMouseEvent, ICoreMouseProtocol, IDecPrivateModes, IDisposable, IModes, IOscLinkData, IWindowOptions } from 'common/Types';\nimport { IBuffer, IBufferSet } from 'common/buffer/Types';\nimport { createDecorator } from 'common/services/ServiceRegistry';\nimport type { Emitter, Event } from 'vs/base/common/event';\n\nexport const IBufferService = createDecorator<IBufferService>('BufferService');\nexport interface IBufferService {\n  serviceBrand: undefined;\n\n  readonly cols: number;\n  readonly rows: number;\n  readonly buffer: IBuffer;\n  readonly buffers: IBufferSet;\n  isUserScrolling: boolean;\n  onResize: Event<{ cols: number, rows: number }>;\n  onScroll: Event<number>;\n  scroll(eraseAttr: IAttributeData, isWrapped?: boolean): void;\n  scrollLines(disp: number, suppressScrollEvent?: boolean): void;\n  resize(cols: number, rows: number): void;\n  reset(): void;\n}\n\nexport const ICoreMouseService = createDecorator<ICoreMouseService>('CoreMouseService');\nexport interface ICoreMouseService {\n  serviceBrand: undefined;\n\n  activeProtocol: string;\n  activeEncoding: string;\n  areMouseEventsActive: boolean;\n  addProtocol(name: string, protocol: ICoreMouseProtocol): void;\n  addEncoding(name: string, encoding: CoreMouseEncoding): void;\n  reset(): void;\n\n  /**\n   * Triggers a mouse event to be sent.\n   *\n   * Returns true if the event passed all protocol restrictions and a report\n   * was sent, otherwise false. The return value may be used to decide whether\n   * the default event action in the bowser component should be omitted.\n   *\n   * Note: The method will change values of the given event object\n   * to fullfill protocol and encoding restrictions.\n   */\n  triggerMouseEvent(event: ICoreMouseEvent): boolean;\n\n  /**\n   * Event to announce changes in mouse tracking.\n   */\n  onProtocolChange: Event<CoreMouseEventType>;\n\n  /**\n   * Human readable version of mouse events.\n   */\n  explainEvents(events: CoreMouseEventType): { [event: string]: boolean };\n}\n\nexport const ICoreService = createDecorator<ICoreService>('CoreService');\nexport interface ICoreService {\n  serviceBrand: undefined;\n\n  /**\n   * Initially the cursor will not be visible until the first time the terminal\n   * is focused.\n   */\n  isCursorInitialized: boolean;\n  isCursorHidden: boolean;\n\n  readonly modes: IModes;\n  readonly decPrivateModes: IDecPrivateModes;\n\n  readonly onData: Event<string>;\n  readonly onUserInput: Event<void>;\n  readonly onBinary: Event<string>;\n  readonly onRequestScrollToBottom: Event<void>;\n\n  reset(): void;\n\n  /**\n   * Triggers the onData event in the public API.\n   * @param data The data that is being emitted.\n   * @param wasUserInput Whether the data originated from the user (as opposed to\n   * resulting from parsing incoming data). When true this will also:\n   * - Scroll to the bottom of the buffer if option scrollOnUserInput is true.\n   * - Fire the `onUserInput` event (so selection can be cleared).\n   */\n  triggerDataEvent(data: string, wasUserInput?: boolean): void;\n\n  /**\n   * Triggers the onBinary event in the public API.\n   * @param data The data that is being emitted.\n   */\n  triggerBinaryEvent(data: string): void;\n}\n\nexport const ICharsetService = createDecorator<ICharsetService>('CharsetService');\nexport interface ICharsetService {\n  serviceBrand: undefined;\n\n  charset: ICharset | undefined;\n  readonly glevel: number;\n\n  reset(): void;\n\n  /**\n   * Set the G level of the terminal.\n   * @param g\n   */\n  setgLevel(g: number): void;\n\n  /**\n   * Set the charset for the given G level of the terminal.\n   * @param g\n   * @param charset\n   */\n  setgCharset(g: number, charset: ICharset | undefined): void;\n}\n\nexport interface IServiceIdentifier<T> {\n  (...args: any[]): void;\n  type: T;\n  _id: string;\n}\n\nexport interface IBrandedService {\n  serviceBrand: undefined;\n}\n\ntype GetLeadingNonServiceArgs<TArgs extends any[]> = TArgs extends [] ? []\n  : TArgs extends [...infer TFirst, infer TLast] ? TLast extends IBrandedService ? GetLeadingNonServiceArgs<TFirst> : TArgs\n    : never;\n\nexport const IInstantiationService = createDecorator<IInstantiationService>('InstantiationService');\nexport interface IInstantiationService {\n  serviceBrand: undefined;\n\n  setService<T>(id: IServiceIdentifier<T>, instance: T): void;\n  getService<T>(id: IServiceIdentifier<T>): T | undefined;\n  createInstance<Ctor extends new (...args: any[]) => any, R extends InstanceType<Ctor>>(t: Ctor, ...args: GetLeadingNonServiceArgs<ConstructorParameters<Ctor>>): R;\n}\n\nexport enum LogLevelEnum {\n  TRACE = 0,\n  DEBUG = 1,\n  INFO = 2,\n  WARN = 3,\n  ERROR = 4,\n  OFF = 5\n}\n\nexport const ILogService = createDecorator<ILogService>('LogService');\nexport interface ILogService {\n  serviceBrand: undefined;\n\n  readonly logLevel: LogLevelEnum;\n\n  trace(message: any, ...optionalParams: any[]): void;\n  debug(message: any, ...optionalParams: any[]): void;\n  info(message: any, ...optionalParams: any[]): void;\n  warn(message: any, ...optionalParams: any[]): void;\n  error(message: any, ...optionalParams: any[]): void;\n}\n\nexport const IOptionsService = createDecorator<IOptionsService>('OptionsService');\nexport interface IOptionsService {\n  serviceBrand: undefined;\n\n  /**\n   * Read only access to the raw options object, this is an internal-only fast path for accessing\n   * single options without any validation as we trust TypeScript to enforce correct usage\n   * internally.\n   */\n  readonly rawOptions: Required<ITerminalOptions>;\n\n  /**\n   * Options as exposed through the public API, this property uses getters and setters with\n   * validation which makes it safer but slower. {@link rawOptions} should be used for pretty much\n   * all internal usage for performance reasons.\n   */\n  readonly options: Required<ITerminalOptions>;\n\n  /**\n   * Adds an event listener for when any option changes.\n   */\n  readonly onOptionChange: Event<keyof ITerminalOptions>;\n\n  /**\n   * Adds an event listener for when a specific option changes, this is a convenience method that is\n   * preferred over {@link onOptionChange} when only a single option is being listened to.\n   */\n  // eslint-disable-next-line @typescript-eslint/naming-convention\n  onSpecificOptionChange<T extends keyof ITerminalOptions>(key: T, listener: (arg1: Required<ITerminalOptions>[T]) => any): IDisposable;\n\n  /**\n   * Adds an event listener for when a set of specific options change, this is a convenience method\n   * that is preferred over {@link onOptionChange} when multiple options are being listened to and\n   * handled the same way.\n   */\n  // eslint-disable-next-line @typescript-eslint/naming-convention\n  onMultipleOptionChange(keys: (keyof ITerminalOptions)[], listener: () => any): IDisposable;\n}\n\nexport type FontWeight = 'normal' | 'bold' | '100' | '200' | '300' | '400' | '500' | '600' | '700' | '800' | '900' | number;\nexport type LogLevel = 'trace' | 'debug' | 'info' | 'warn' | 'error' | 'off';\n\nexport interface ITerminalOptions {\n  allowProposedApi?: boolean;\n  allowTransparency?: boolean;\n  altClickMovesCursor?: boolean;\n  cols?: number;\n  convertEol?: boolean;\n  cursorBlink?: boolean;\n  cursorStyle?: CursorStyle;\n  cursorWidth?: number;\n  cursorInactiveStyle?: CursorInactiveStyle;\n  customGlyphs?: boolean;\n  disableStdin?: boolean;\n  documentOverride?: any | null;\n  drawBoldTextInBrightColors?: boolean;\n  /** @deprecated No longer supported */\n  fastScrollModifier?: 'none' | 'alt' | 'ctrl' | 'shift';\n  fastScrollSensitivity?: number;\n  fontSize?: number;\n  fontFamily?: string;\n  fontWeight?: FontWeight;\n  fontWeightBold?: FontWeight;\n  ignoreBracketedPasteMode?: boolean;\n  letterSpacing?: number;\n  lineHeight?: number;\n  linkHandler?: ILinkHandler | null;\n  logLevel?: LogLevel;\n  logger?: ILogger | null;\n  macOptionIsMeta?: boolean;\n  macOptionClickForcesSelection?: boolean;\n  minimumContrastRatio?: number;\n  reflowCursorLine?: boolean;\n  rescaleOverlappingGlyphs?: boolean;\n  rightClickSelectsWord?: boolean;\n  rows?: number;\n  screenReaderMode?: boolean;\n  scrollback?: number;\n  scrollOnUserInput?: boolean;\n  scrollSensitivity?: number;\n  smoothScrollDuration?: number;\n  tabStopWidth?: number;\n  theme?: ITheme;\n  windowsMode?: boolean;\n  windowsPty?: IWindowsPty;\n  windowOptions?: IWindowOptions;\n  wordSeparator?: string;\n  overviewRuler?: IOverviewRulerOptions;\n\n  [key: string]: any;\n  cancelEvents: boolean;\n  termName: string;\n}\n\nexport interface ITheme {\n  foreground?: string;\n  background?: string;\n  cursor?: string;\n  cursorAccent?: string;\n  selectionForeground?: string;\n  selectionBackground?: string;\n  selectionInactiveBackground?: string;\n  scrollbarSliderBackground?: string;\n  scrollbarSliderHoverBackground?: string;\n  scrollbarSliderActiveBackground?: string;\n  overviewRulerBorder?: string;\n  black?: string;\n  red?: string;\n  green?: string;\n  yellow?: string;\n  blue?: string;\n  magenta?: string;\n  cyan?: string;\n  white?: string;\n  brightBlack?: string;\n  brightRed?: string;\n  brightGreen?: string;\n  brightYellow?: string;\n  brightBlue?: string;\n  brightMagenta?: string;\n  brightCyan?: string;\n  brightWhite?: string;\n  extendedAnsi?: string[];\n}\n\nexport const IOscLinkService = createDecorator<IOscLinkService>('OscLinkService');\nexport interface IOscLinkService {\n  serviceBrand: undefined;\n  /**\n   * Registers a link to the service, returning the link ID. The link data is managed by this\n   * service and will be freed when this current cursor position is trimmed off the buffer.\n   */\n  registerLink(linkData: IOscLinkData): number;\n  /**\n   * Adds a line to a link if needed.\n   */\n  addLineToLink(linkId: number, y: number): void;\n  /** Get the link data associated with a link ID. */\n  getLinkData(linkId: number): IOscLinkData | undefined;\n}\n\n/*\n * Width and Grapheme_Cluster_Break properties of a character as a bit mask.\n *\n * bit 0: shouldJoin - should combine with preceding character.\n * bit 1..2: wcwidth - see UnicodeCharWidth.\n * bit 3..31: class of character (currently only 4 bits are used).\n *   This is used to determined grapheme clustering - i.e. which codepoints\n *   are to be combined into a single compound character.\n *\n * Use the UnicodeService static function createPropertyValue to create a\n * UnicodeCharProperties; use extractShouldJoin, extractWidth, and\n * extractCharKind to extract the components.\n */\nexport type UnicodeCharProperties = number;\n\n/**\n * Width in columns of a character.\n * In a CJK context, \"half-width\" characters (such as Latin) are width 1,\n * while \"full-width\" characters (such as Kanji) are 2 columns wide.\n * Combining characters (such as accents) are width 0.\n */\nexport type UnicodeCharWidth = 0 | 1 | 2;\n\nexport const IUnicodeService = createDecorator<IUnicodeService>('UnicodeService');\nexport interface IUnicodeService {\n  serviceBrand: undefined;\n  /** Register an Unicode version provider. */\n  register(provider: IUnicodeVersionProvider): void;\n  /** Registered Unicode versions. */\n  readonly versions: string[];\n  /** Currently active version. */\n  activeVersion: string;\n  /** Event triggered, when activate version changed. */\n  readonly onChange: Event<string>;\n\n  /**\n   * Unicode version dependent\n   */\n  wcwidth(codepoint: number): UnicodeCharWidth;\n  getStringCellWidth(s: string): number;\n  /**\n   * Return character width and type for grapheme clustering.\n   * If preceding != 0, it is the return code from the previous character;\n   * in that case the result specifies if the characters should be joined.\n   */\n  charProperties(codepoint: number, preceding: UnicodeCharProperties): UnicodeCharProperties;\n}\n\nexport interface IUnicodeVersionProvider {\n  readonly version: string;\n  wcwidth(ucs: number): UnicodeCharWidth;\n  charProperties(codepoint: number, preceding: UnicodeCharProperties): UnicodeCharProperties;\n}\n\nexport const IDecorationService = createDecorator<IDecorationService>('DecorationService');\nexport interface IDecorationService extends IDisposable {\n  serviceBrand: undefined;\n  readonly decorations: IterableIterator<IInternalDecoration>;\n  readonly onDecorationRegistered: Event<IInternalDecoration>;\n  readonly onDecorationRemoved: Event<IInternalDecoration>;\n  registerDecoration(decorationOptions: IDecorationOptions): IDecoration | undefined;\n  reset(): void;\n  /**\n   * Trigger a callback over the decoration at a cell (in no particular order). This uses a callback\n   * instead of an iterator as it's typically used in hot code paths.\n   */\n  forEachDecorationAtCell(x: number, line: number, layer: 'bottom' | 'top' | undefined, callback: (decoration: IInternalDecoration) => void): void;\n}\nexport interface IInternalDecoration extends IDecoration {\n  readonly options: IDecorationOptions;\n  readonly backgroundColorRGB: IColor | undefined;\n  readonly foregroundColorRGB: IColor | undefined;\n  readonly onRenderEmitter: Emitter<HTMLElement>;\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n *\n * This was heavily inspired from microsoft/vscode's dependency injection system (MIT).\n */\n/*---------------------------------------------------------------------------------------------\n *  Copyright (c) Microsoft Corporation. All rights reserved.\n *  Licensed under the MIT License. See License.txt in the project root for license information.\n *--------------------------------------------------------------------------------------------*/\n\nimport { IInstantiationService, IServiceIdentifier } from 'common/services/Services';\nimport { getServiceDependencies } from 'common/services/ServiceRegistry';\n\nexport class ServiceCollection {\n\n  private _entries = new Map<IServiceIdentifier<any>, any>();\n\n  constructor(...entries: [IServiceIdentifier<any>, any][]) {\n    for (const [id, service] of entries) {\n      this.set(id, service);\n    }\n  }\n\n  public set<T>(id: IServiceIdentifier<T>, instance: T): T {\n    const result = this._entries.get(id);\n    this._entries.set(id, instance);\n    return result;\n  }\n\n  public forEach(callback: (id: IServiceIdentifier<any>, instance: any) => any): void {\n    for (const [key, value] of this._entries.entries()) {\n      callback(key, value);\n    }\n  }\n\n  public has(id: IServiceIdentifier<any>): boolean {\n    return this._entries.has(id);\n  }\n\n  public get<T>(id: IServiceIdentifier<T>): T | undefined {\n    return this._entries.get(id);\n  }\n}\n\nexport class InstantiationService implements IInstantiationService {\n  public serviceBrand: undefined;\n\n  private readonly _services: ServiceCollection = new ServiceCollection();\n\n  constructor() {\n    this._services.set(IInstantiationService, this);\n  }\n\n  public setService<T>(id: IServiceIdentifier<T>, instance: T): void {\n    this._services.set(id, instance);\n  }\n\n  public getService<T>(id: IServiceIdentifier<T>): T | undefined {\n    return this._services.get(id);\n  }\n\n  public createInstance<T>(ctor: any, ...args: any[]): T {\n    const serviceDependencies = getServiceDependencies(ctor).sort((a, b) => a.index - b.index);\n\n    const serviceArgs: any[] = [];\n    for (const dependency of serviceDependencies) {\n      const service = this._services.get(dependency.id);\n      if (!service) {\n        throw new Error(`[createInstance] ${ctor.name} depends on UNKNOWN service ${dependency.id._id}.`);\n      }\n      serviceArgs.push(service);\n    }\n\n    const firstServiceArgPos = serviceDependencies.length > 0 ? serviceDependencies[0].index : args.length;\n\n    // check for argument mismatches, adjust static args if needed\n    if (args.length !== firstServiceArgPos) {\n      throw new Error(`[createInstance] First service dependency of ${ctor.name} at position ${firstServiceArgPos + 1} conflicts with ${args.length} static arguments`);\n    }\n\n    // now create the instance\n    return new ctor(...[...args, ...serviceArgs]);\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { Disposable } from 'vs/base/common/lifecycle';\nimport { ILogService, IOptionsService, LogLevelEnum } from 'common/services/Services';\n\ntype LogType = (message?: any, ...optionalParams: any[]) => void;\n\ninterface IConsole {\n  log: LogType;\n  error: LogType;\n  info: LogType;\n  trace: LogType;\n  warn: LogType;\n}\n\n// console is available on both node.js and browser contexts but the common\n// module doesn't depend on them so we need to explicitly declare it.\ndeclare const console: IConsole;\n\nconst optionsKeyToLogLevel: { [key: string]: LogLevelEnum } = {\n  trace: LogLevelEnum.TRACE,\n  debug: LogLevelEnum.DEBUG,\n  info: LogLevelEnum.INFO,\n  warn: LogLevelEnum.WARN,\n  error: LogLevelEnum.ERROR,\n  off: LogLevelEnum.OFF\n};\n\nconst LOG_PREFIX = 'xterm.js: ';\n\nexport class LogService extends Disposable implements ILogService {\n  public serviceBrand: any;\n\n  private _logLevel: LogLevelEnum = LogLevelEnum.OFF;\n  public get logLevel(): LogLevelEnum { return this._logLevel; }\n\n  constructor(\n    @IOptionsService private readonly _optionsService: IOptionsService\n  ) {\n    super();\n    this._updateLogLevel();\n    this._register(this._optionsService.onSpecificOptionChange('logLevel', () => this._updateLogLevel()));\n\n    // For trace logging, assume the latest created log service is valid\n    traceLogger = this;\n  }\n\n  private _updateLogLevel(): void {\n    this._logLevel = optionsKeyToLogLevel[this._optionsService.rawOptions.logLevel];\n  }\n\n  private _evalLazyOptionalParams(optionalParams: any[]): void {\n    for (let i = 0; i < optionalParams.length; i++) {\n      if (typeof optionalParams[i] === 'function') {\n        optionalParams[i] = optionalParams[i]();\n      }\n    }\n  }\n\n  private _log(type: LogType, message: string, optionalParams: any[]): void {\n    this._evalLazyOptionalParams(optionalParams);\n    type.call(console, (this._optionsService.options.logger ? '' : LOG_PREFIX) + message, ...optionalParams);\n  }\n\n  public trace(message: string, ...optionalParams: any[]): void {\n    if (this._logLevel <= LogLevelEnum.TRACE) {\n      this._log(this._optionsService.options.logger?.trace.bind(this._optionsService.options.logger) ?? console.log, message, optionalParams);\n    }\n  }\n\n  public debug(message: string, ...optionalParams: any[]): void {\n    if (this._logLevel <= LogLevelEnum.DEBUG) {\n      this._log(this._optionsService.options.logger?.debug.bind(this._optionsService.options.logger) ?? console.log, message, optionalParams);\n    }\n  }\n\n  public info(message: string, ...optionalParams: any[]): void {\n    if (this._logLevel <= LogLevelEnum.INFO) {\n      this._log(this._optionsService.options.logger?.info.bind(this._optionsService.options.logger) ?? console.info, message, optionalParams);\n    }\n  }\n\n  public warn(message: string, ...optionalParams: any[]): void {\n    if (this._logLevel <= LogLevelEnum.WARN) {\n      this._log(this._optionsService.options.logger?.warn.bind(this._optionsService.options.logger) ?? console.warn, message, optionalParams);\n    }\n  }\n\n  public error(message: string, ...optionalParams: any[]): void {\n    if (this._logLevel <= LogLevelEnum.ERROR) {\n      this._log(this._optionsService.options.logger?.error.bind(this._optionsService.options.logger) ?? console.error, message, optionalParams);\n    }\n  }\n}\n\nlet traceLogger: ILogService;\nexport function setTraceLogger(logger: ILogService): void {\n  traceLogger = logger;\n}\n\n/**\n * A decorator that can be used to automatically log trace calls to the decorated function.\n */\nexport function traceCall(_target: any, key: string, descriptor: any): any {\n  if (typeof descriptor.value !== 'function') {\n    throw new Error('not supported');\n  }\n  const fnKey = 'value';\n  const fn = descriptor.value;\n  descriptor[fnKey] = function (...args: any[]) {\n    // Early exit\n    if (traceLogger.logLevel !== LogLevelEnum.TRACE) {\n      return fn.apply(this, args);\n    }\n\n    traceLogger.trace(`GlyphRenderer#${fn.name}(${args.map(e => JSON.stringify(e)).join(', ')})`);\n    const result = fn.apply(this, args);\n    traceLogger.trace(`GlyphRenderer#${fn.name} return`, result);\n    return result;\n  };\n}\n", "/**\n * Copyright (c) 2016 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { ICircularList } from 'common/Types';\nimport { Disposable } from 'vs/base/common/lifecycle';\nimport { Emitter } from 'vs/base/common/event';\n\nexport interface IInsertEvent {\n  index: number;\n  amount: number;\n}\n\nexport interface IDeleteEvent {\n  index: number;\n  amount: number;\n}\n\n/**\n * Represents a circular list; a list with a maximum size that wraps around when push is called,\n * overriding values at the start of the list.\n */\nexport class CircularList<T> extends Disposable implements ICircularList<T> {\n  protected _array: (T | undefined)[];\n  private _startIndex: number;\n  private _length: number;\n\n  public readonly onDeleteEmitter = this._register(new Emitter<IDeleteEvent>());\n  public readonly onDelete = this.onDeleteEmitter.event;\n  public readonly onInsertEmitter = this._register(new Emitter<IInsertEvent>());\n  public readonly onInsert = this.onInsertEmitter.event;\n  public readonly onTrimEmitter = this._register(new Emitter<number>());\n  public readonly onTrim = this.onTrimEmitter.event;\n\n  constructor(\n    private _maxLength: number\n  ) {\n    super();\n    this._array = new Array<T>(this._maxLength);\n    this._startIndex = 0;\n    this._length = 0;\n  }\n\n  public get maxLength(): number {\n    return this._maxLength;\n  }\n\n  public set maxLength(newMaxLength: number) {\n    // There was no change in maxLength, return early.\n    if (this._maxLength === newMaxLength) {\n      return;\n    }\n\n    // Reconstruct array, starting at index 0. Only transfer values from the\n    // indexes 0 to length.\n    const newArray = new Array<T | undefined>(newMaxLength);\n    for (let i = 0; i < Math.min(newMaxLength, this.length); i++) {\n      newArray[i] = this._array[this._getCyclicIndex(i)];\n    }\n    this._array = newArray;\n    this._maxLength = newMaxLength;\n    this._startIndex = 0;\n  }\n\n  public get length(): number {\n    return this._length;\n  }\n\n  public set length(newLength: number) {\n    if (newLength > this._length) {\n      for (let i = this._length; i < newLength; i++) {\n        this._array[i] = undefined;\n      }\n    }\n    this._length = newLength;\n  }\n\n  /**\n   * Gets the value at an index.\n   *\n   * Note that for performance reasons there is no bounds checking here, the index reference is\n   * circular so this should always return a value and never throw.\n   * @param index The index of the value to get.\n   * @returns The value corresponding to the index.\n   */\n  public get(index: number): T | undefined {\n    return this._array[this._getCyclicIndex(index)];\n  }\n\n  /**\n   * Sets the value at an index.\n   *\n   * Note that for performance reasons there is no bounds checking here, the index reference is\n   * circular so this should always return a value and never throw.\n   * @param index The index to set.\n   * @param value The value to set.\n   */\n  public set(index: number, value: T | undefined): void {\n    this._array[this._getCyclicIndex(index)] = value;\n  }\n\n  /**\n   * Pushes a new value onto the list, wrapping around to the start of the array, overriding index 0\n   * if the maximum length is reached.\n   * @param value The value to push onto the list.\n   */\n  public push(value: T): void {\n    this._array[this._getCyclicIndex(this._length)] = value;\n    if (this._length === this._maxLength) {\n      this._startIndex = ++this._startIndex % this._maxLength;\n      this.onTrimEmitter.fire(1);\n    } else {\n      this._length++;\n    }\n  }\n\n  /**\n   * Advance ringbuffer index and return current element for recycling.\n   * Note: The buffer must be full for this method to work.\n   * @throws When the buffer is not full.\n   */\n  public recycle(): T {\n    if (this._length !== this._maxLength) {\n      throw new Error('Can only recycle when the buffer is full');\n    }\n    this._startIndex = ++this._startIndex % this._maxLength;\n    this.onTrimEmitter.fire(1);\n    return this._array[this._getCyclicIndex(this._length - 1)]!;\n  }\n\n  /**\n   * Ringbuffer is at max length.\n   */\n  public get isFull(): boolean {\n    return this._length === this._maxLength;\n  }\n\n  /**\n   * Removes and returns the last value on the list.\n   * @returns The popped value.\n   */\n  public pop(): T | undefined {\n    return this._array[this._getCyclicIndex(this._length-- - 1)];\n  }\n\n  /**\n   * Deletes and/or inserts items at a particular index (in that order). Unlike\n   * Array.prototype.splice, this operation does not return the deleted items as a new array in\n   * order to save creating a new array. Note that this operation may shift all values in the list\n   * in the worst case.\n   * @param start The index to delete and/or insert.\n   * @param deleteCount The number of elements to delete.\n   * @param items The items to insert.\n   */\n  public splice(start: number, deleteCount: number, ...items: T[]): void {\n    // Delete items\n    if (deleteCount) {\n      for (let i = start; i < this._length - deleteCount; i++) {\n        this._array[this._getCyclicIndex(i)] = this._array[this._getCyclicIndex(i + deleteCount)];\n      }\n      this._length -= deleteCount;\n      this.onDeleteEmitter.fire({ index: start, amount: deleteCount });\n    }\n\n    // Add items\n    for (let i = this._length - 1; i >= start; i--) {\n      this._array[this._getCyclicIndex(i + items.length)] = this._array[this._getCyclicIndex(i)];\n    }\n    for (let i = 0; i < items.length; i++) {\n      this._array[this._getCyclicIndex(start + i)] = items[i];\n    }\n    if (items.length) {\n      this.onInsertEmitter.fire({ index: start, amount: items.length });\n    }\n\n    // Adjust length as needed\n    if (this._length + items.length > this._maxLength) {\n      const countToTrim = (this._length + items.length) - this._maxLength;\n      this._startIndex += countToTrim;\n      this._length = this._maxLength;\n      this.onTrimEmitter.fire(countToTrim);\n    } else {\n      this._length += items.length;\n    }\n  }\n\n  /**\n   * Trims a number of items from the start of the list.\n   * @param count The number of items to remove.\n   */\n  public trimStart(count: number): void {\n    if (count > this._length) {\n      count = this._length;\n    }\n    this._startIndex += count;\n    this._length -= count;\n    this.onTrimEmitter.fire(count);\n  }\n\n  public shiftElements(start: number, count: number, offset: number): void {\n    if (count <= 0) {\n      return;\n    }\n    if (start < 0 || start >= this._length) {\n      throw new Error('start argument out of range');\n    }\n    if (start + offset < 0) {\n      throw new Error('Cannot shift elements in list beyond index 0');\n    }\n\n    if (offset > 0) {\n      for (let i = count - 1; i >= 0; i--) {\n        this.set(start + i + offset, this.get(start + i));\n      }\n      const expandListBy = (start + count + offset) - this._length;\n      if (expandListBy > 0) {\n        this._length += expandListBy;\n        while (this._length > this._maxLength) {\n          this._length--;\n          this._startIndex++;\n          this.onTrimEmitter.fire(1);\n        }\n      }\n    } else {\n      for (let i = 0; i < count; i++) {\n        this.set(start + i + offset, this.get(start + i));\n      }\n    }\n  }\n\n  /**\n   * Gets the cyclic index for the specified regular index. The cyclic index can then be used on the\n   * backing array to get the element associated with the regular index.\n   * @param index The regular index.\n   * @returns The cyclic index.\n   */\n  private _getCyclicIndex(index: number): number {\n    return (this._startIndex + index) % this._maxLength;\n  }\n}\n", "/**\n * Copyright (c) 2016 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\ninterface INavigator {\n  userAgent: string;\n  language: string;\n  platform: string;\n}\n\n// We're declaring a navigator global here as we expect it in all runtimes (node and browser), but\n// we want this module to live in common.\ndeclare const navigator: INavigator;\ndeclare const process: unknown;\n\nexport const isNode = (typeof process !== 'undefined' && 'title' in (process as any)) ? true : false;\nconst userAgent = (isNode) ? 'node' : navigator.userAgent;\nconst platform = (isNode) ? 'node' : navigator.platform;\n\nexport const isFirefox = userAgent.includes('Firefox');\nexport const isLegacyEdge = userAgent.includes('Edge');\nexport const isSafari = /^((?!chrome|android).)*safari/i.test(userAgent);\nexport function getSafariVersion(): number {\n  if (!isSafari) {\n    return 0;\n  }\n  const majorVersion = userAgent.match(/Version\\/(\\d+)/);\n  if (majorVersion === null || majorVersion.length < 2) {\n    return 0;\n  }\n  return parseInt(majorVersion[1]);\n}\n\n// Find the users platform. We use this to interpret the meta key\n// and ISO third level shifts.\n// http://stackoverflow.com/q/19877924/577598\nexport const isMac = ['Macintosh', 'MacIntel', 'MacPPC', 'Mac68K'].includes(platform);\nexport const isIpad = platform === 'iPad';\nexport const isIphone = platform === 'iPhone';\nexport const isWindows = ['Windows', 'Win16', 'Win32', 'WinCE'].includes(platform);\nexport const isLinux = platform.indexOf('Linux') >= 0;\n// Note that when this is true, isLinux will also be true.\nexport const isChromeOS = /\\bCrOS\\b/.test(userAgent);\n", "/**\n * Copyright (c) 2022 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { isNode } from 'common/Platform';\n\ninterface ITaskQueue {\n  /**\n   * Adds a task to the queue which will run in a future idle callback.\n   * To avoid perceivable stalls on the mainthread, tasks with heavy workload\n   * should split their work into smaller pieces and return `true` to get\n   * called again until the work is done (on falsy return value).\n   */\n  enqueue(task: () => boolean | void): void;\n\n  /**\n   * Flushes the queue, running all remaining tasks synchronously.\n   */\n  flush(): void;\n\n  /**\n   * Clears any remaining tasks from the queue, these will not be run.\n   */\n  clear(): void;\n}\n\ninterface ITaskDeadline {\n  timeRemaining(): number;\n}\ntype CallbackWithDeadline = (deadline: ITaskDeadline) => void;\n\nabstract class TaskQueue implements ITaskQueue {\n  private _tasks: (() => boolean | void)[] = [];\n  private _idleCallback?: number;\n  private _i = 0;\n\n  protected abstract _requestCallback(callback: CallbackWithDeadline): number;\n  protected abstract _cancelCallback(identifier: number): void;\n\n  public enqueue(task: () => boolean | void): void {\n    this._tasks.push(task);\n    this._start();\n  }\n\n  public flush(): void {\n    while (this._i < this._tasks.length) {\n      if (!this._tasks[this._i]()) {\n        this._i++;\n      }\n    }\n    this.clear();\n  }\n\n  public clear(): void {\n    if (this._idleCallback) {\n      this._cancelCallback(this._idleCallback);\n      this._idleCallback = undefined;\n    }\n    this._i = 0;\n    this._tasks.length = 0;\n  }\n\n  private _start(): void {\n    if (!this._idleCallback) {\n      this._idleCallback = this._requestCallback(this._process.bind(this));\n    }\n  }\n\n  private _process(deadline: ITaskDeadline): void {\n    this._idleCallback = undefined;\n    let taskDuration = 0;\n    let longestTask = 0;\n    let lastDeadlineRemaining = deadline.timeRemaining();\n    let deadlineRemaining = 0;\n    while (this._i < this._tasks.length) {\n      taskDuration = Date.now();\n      if (!this._tasks[this._i]()) {\n        this._i++;\n      }\n      // other than performance.now, Date.now might not be stable (changes on wall clock changes),\n      // this is not an issue here as a clock change during a short running task is very unlikely\n      // in case it still happened and leads to negative duration, simply assume 1 msec\n      taskDuration = Math.max(1, Date.now() - taskDuration);\n      longestTask = Math.max(taskDuration, longestTask);\n      // Guess the following task will take a similar time to the longest task in this batch, allow\n      // additional room to try avoid exceeding the deadline\n      deadlineRemaining = deadline.timeRemaining();\n      if (longestTask * 1.5 > deadlineRemaining) {\n        // Warn when the time exceeding the deadline is over 20ms, if this happens in practice the\n        // task should be split into sub-tasks to ensure the UI remains responsive.\n        if (lastDeadlineRemaining - taskDuration < -20) {\n          console.warn(`task queue exceeded allotted deadline by ${Math.abs(Math.round(lastDeadlineRemaining - taskDuration))}ms`);\n        }\n        this._start();\n        return;\n      }\n      lastDeadlineRemaining = deadlineRemaining;\n    }\n    this.clear();\n  }\n}\n\n/**\n * A queue of that runs tasks over several tasks via setTimeout, trying to maintain above 60 frames\n * per second. The tasks will run in the order they are enqueued, but they will run some time later,\n * and care should be taken to ensure they're non-urgent and will not introduce race conditions.\n */\nexport class PriorityTaskQueue extends TaskQueue {\n  protected _requestCallback(callback: CallbackWithDeadline): number {\n    return setTimeout(() => callback(this._createDeadline(16)));\n  }\n\n  protected _cancelCallback(identifier: number): void {\n    clearTimeout(identifier);\n  }\n\n  private _createDeadline(duration: number): ITaskDeadline {\n    const end = Date.now() + duration;\n    return {\n      timeRemaining: () => Math.max(0, end - Date.now())\n    };\n  }\n}\n\nclass IdleTaskQueueInternal extends TaskQueue {\n  protected _requestCallback(callback: IdleRequestCallback): number {\n    return requestIdleCallback(callback);\n  }\n\n  protected _cancelCallback(identifier: number): void {\n    cancelIdleCallback(identifier);\n  }\n}\n\n/**\n * A queue of that runs tasks over several idle callbacks, trying to respect the idle callback's\n * deadline given by the environment. The tasks will run in the order they are enqueued, but they\n * will run some time later, and care should be taken to ensure they're non-urgent and will not\n * introduce race conditions.\n *\n * This reverts to a {@link PriorityTaskQueue} if the environment does not support idle callbacks.\n */\n// eslint-disable-next-line @typescript-eslint/naming-convention\nexport const IdleTaskQueue = (!isNode && 'requestIdleCallback' in window) ? IdleTaskQueueInternal : PriorityTaskQueue;\n\n/**\n * An object that tracks a single debounced task that will run on the next idle frame. When called\n * multiple times, only the last set task will run.\n */\nexport class DebouncedIdleTask {\n  private _queue: ITaskQueue;\n\n  constructor() {\n    this._queue = new IdleTaskQueue();\n  }\n\n  public set(task: () => boolean | void): void {\n    this._queue.clear();\n    this._queue.enqueue(task);\n  }\n\n  public flush(): void {\n    this._queue.flush();\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { BufferLine } from 'common/buffer/BufferLine';\nimport { CircularList } from 'common/CircularList';\nimport { IBufferLine, ICellData } from 'common/Types';\n\nexport interface INewLayoutResult {\n  layout: number[];\n  countRemoved: number;\n}\n\n/**\n * Evaluates and returns indexes to be removed after a reflow larger occurs. Lines will be removed\n * when a wrapped line unwraps.\n * @param lines The buffer lines.\n * @param oldCols The columns before resize\n * @param newCols The columns after resize.\n * @param bufferAbsoluteY The absolute y position of the cursor (baseY + cursorY).\n * @param nullCell The cell data to use when filling in empty cells.\n * @param reflowCursorLine Whether to reflow the line containing the cursor.\n */\nexport function reflowLargerGetLinesToRemove(lines: CircularList<IBufferLine>, oldCols: number, newCols: number, bufferAbsoluteY: number, nullCell: ICellData, reflowCursorLine: boolean): number[] {\n  // Gather all BufferLines that need to be removed from the Buffer here so that they can be\n  // batched up and only committed once\n  const toRemove: number[] = [];\n\n  for (let y = 0; y < lines.length - 1; y++) {\n    // Check if this row is wrapped\n    let i = y;\n    let nextLine = lines.get(++i) as BufferLine;\n    if (!nextLine.isWrapped) {\n      continue;\n    }\n\n    // Check how many lines it's wrapped for\n    const wrappedLines: BufferLine[] = [lines.get(y) as BufferLine];\n    while (i < lines.length && nextLine.isWrapped) {\n      wrappedLines.push(nextLine);\n      nextLine = lines.get(++i) as BufferLine;\n    }\n\n    if (!reflowCursorLine) {\n      // If these lines contain the cursor don't touch them, the program will handle fixing up\n      // wrapped lines with the cursor\n      if (bufferAbsoluteY >= y && bufferAbsoluteY < i) {\n        y += wrappedLines.length - 1;\n        continue;\n      }\n    }\n\n    // Copy buffer data to new locations\n    let destLineIndex = 0;\n    let destCol = getWrappedLineTrimmedLength(wrappedLines, destLineIndex, oldCols);\n    let srcLineIndex = 1;\n    let srcCol = 0;\n    while (srcLineIndex < wrappedLines.length) {\n      const srcTrimmedTineLength = getWrappedLineTrimmedLength(wrappedLines, srcLineIndex, oldCols);\n      const srcRemainingCells = srcTrimmedTineLength - srcCol;\n      const destRemainingCells = newCols - destCol;\n      const cellsToCopy = Math.min(srcRemainingCells, destRemainingCells);\n\n      wrappedLines[destLineIndex].copyCellsFrom(wrappedLines[srcLineIndex], srcCol, destCol, cellsToCopy, false);\n\n      destCol += cellsToCopy;\n      if (destCol === newCols) {\n        destLineIndex++;\n        destCol = 0;\n      }\n      srcCol += cellsToCopy;\n      if (srcCol === srcTrimmedTineLength) {\n        srcLineIndex++;\n        srcCol = 0;\n      }\n\n      // Make sure the last cell isn't wide, if it is copy it to the current dest\n      if (destCol === 0 && destLineIndex !== 0) {\n        if (wrappedLines[destLineIndex - 1].getWidth(newCols - 1) === 2) {\n          wrappedLines[destLineIndex].copyCellsFrom(wrappedLines[destLineIndex - 1], newCols - 1, destCol++, 1, false);\n          // Null out the end of the last row\n          wrappedLines[destLineIndex - 1].setCell(newCols - 1, nullCell);\n        }\n      }\n    }\n\n    // Clear out remaining cells or fragments could remain;\n    wrappedLines[destLineIndex].replaceCells(destCol, newCols, nullCell);\n\n    // Work backwards and remove any rows at the end that only contain null cells\n    let countToRemove = 0;\n    for (let i = wrappedLines.length - 1; i > 0; i--) {\n      if (i > destLineIndex || wrappedLines[i].getTrimmedLength() === 0) {\n        countToRemove++;\n      } else {\n        break;\n      }\n    }\n\n    if (countToRemove > 0) {\n      toRemove.push(y + wrappedLines.length - countToRemove); // index\n      toRemove.push(countToRemove);\n    }\n\n    y += wrappedLines.length - 1;\n  }\n  return toRemove;\n}\n\n/**\n * Creates and return the new layout for lines given an array of indexes to be removed.\n * @param lines The buffer lines.\n * @param toRemove The indexes to remove.\n */\nexport function reflowLargerCreateNewLayout(lines: CircularList<IBufferLine>, toRemove: number[]): INewLayoutResult {\n  const layout: number[] = [];\n  // First iterate through the list and get the actual indexes to use for rows\n  let nextToRemoveIndex = 0;\n  let nextToRemoveStart = toRemove[nextToRemoveIndex];\n  let countRemovedSoFar = 0;\n  for (let i = 0; i < lines.length; i++) {\n    if (nextToRemoveStart === i) {\n      const countToRemove = toRemove[++nextToRemoveIndex];\n\n      // Tell markers that there was a deletion\n      lines.onDeleteEmitter.fire({\n        index: i - countRemovedSoFar,\n        amount: countToRemove\n      });\n\n      i += countToRemove - 1;\n      countRemovedSoFar += countToRemove;\n      nextToRemoveStart = toRemove[++nextToRemoveIndex];\n    } else {\n      layout.push(i);\n    }\n  }\n  return {\n    layout,\n    countRemoved: countRemovedSoFar\n  };\n}\n\n/**\n * Applies a new layout to the buffer. This essentially does the same as many splice calls but it's\n * done all at once in a single iteration through the list since splice is very expensive.\n * @param lines The buffer lines.\n * @param newLayout The new layout to apply.\n */\nexport function reflowLargerApplyNewLayout(lines: CircularList<IBufferLine>, newLayout: number[]): void {\n  // Record original lines so they don't get overridden when we rearrange the list\n  const newLayoutLines: BufferLine[] = [];\n  for (let i = 0; i < newLayout.length; i++) {\n    newLayoutLines.push(lines.get(newLayout[i]) as BufferLine);\n  }\n\n  // Rearrange the list\n  for (let i = 0; i < newLayoutLines.length; i++) {\n    lines.set(i, newLayoutLines[i]);\n  }\n  lines.length = newLayout.length;\n}\n\n/**\n * Gets the new line lengths for a given wrapped line. The purpose of this function it to pre-\n * compute the wrapping points since wide characters may need to be wrapped onto the following line.\n * This function will return an array of numbers of where each line wraps to, the resulting array\n * will only contain the values `newCols` (when the line does not end with a wide character) and\n * `newCols - 1` (when the line does end with a wide character), except for the last value which\n * will contain the remaining items to fill the line.\n *\n * Calling this with a `newCols` value of `1` will lock up.\n *\n * @param wrappedLines The wrapped lines to evaluate.\n * @param oldCols The columns before resize.\n * @param newCols The columns after resize.\n */\nexport function reflowSmallerGetNewLineLengths(wrappedLines: BufferLine[], oldCols: number, newCols: number): number[] {\n  const newLineLengths: number[] = [];\n  const cellsNeeded = wrappedLines.map((l, i) => getWrappedLineTrimmedLength(wrappedLines, i, oldCols)).reduce((p, c) => p + c);\n\n  // Use srcCol and srcLine to find the new wrapping point, use that to get the cellsAvailable and\n  // linesNeeded\n  let srcCol = 0;\n  let srcLine = 0;\n  let cellsAvailable = 0;\n  while (cellsAvailable < cellsNeeded) {\n    if (cellsNeeded - cellsAvailable < newCols) {\n      // Add the final line and exit the loop\n      newLineLengths.push(cellsNeeded - cellsAvailable);\n      break;\n    }\n    srcCol += newCols;\n    const oldTrimmedLength = getWrappedLineTrimmedLength(wrappedLines, srcLine, oldCols);\n    if (srcCol > oldTrimmedLength) {\n      srcCol -= oldTrimmedLength;\n      srcLine++;\n    }\n    const endsWithWide = wrappedLines[srcLine].getWidth(srcCol - 1) === 2;\n    if (endsWithWide) {\n      srcCol--;\n    }\n    const lineLength = endsWithWide ? newCols - 1 : newCols;\n    newLineLengths.push(lineLength);\n    cellsAvailable += lineLength;\n  }\n\n  return newLineLengths;\n}\n\nexport function getWrappedLineTrimmedLength(lines: BufferLine[], i: number, cols: number): number {\n  // If this is the last row in the wrapped line, get the actual trimmed length\n  if (i === lines.length - 1) {\n    return lines[i].getTrimmedLength();\n  }\n  // Detect whether the following line starts with a wide character and the end of the current line\n  // is null, if so then we can be pretty sure the null character should be excluded from the line\n  // length]\n  const endsInNull = !(lines[i].hasContent(cols - 1)) && lines[i].getWidth(cols - 1) === 1;\n  const followingLineStartsWithWide = lines[i + 1].getWidth(0) === 2;\n  if (endsInNull && followingLineStartsWithWide) {\n    return cols - 1;\n  }\n  return cols;\n}\n", "/**\n * Copyright (c) 2018 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { IDisposable, IMarker } from 'common/Types';\nimport { Emitter } from 'vs/base/common/event';\nimport { dispose } from 'vs/base/common/lifecycle';\n\nexport class Marker implements IMarker {\n  private static _nextId = 1;\n\n  public isDisposed: boolean = false;\n  private readonly _disposables: IDisposable[] = [];\n\n  private readonly _id: number = Marker._nextId++;\n  public get id(): number { return this._id; }\n\n  private readonly _onDispose = this.register(new Emitter<void>());\n  public readonly onDispose = this._onDispose.event;\n\n  constructor(\n    public line: number\n  ) {\n  }\n\n  public dispose(): void {\n    if (this.isDisposed) {\n      return;\n    }\n    this.isDisposed = true;\n    this.line = -1;\n    // Emit before super.dispose such that dispose listeners get a change to react\n    this._onDispose.fire();\n    dispose(this._disposables);\n    this._disposables.length = 0;\n  }\n\n  public register<T extends IDisposable>(disposable: T): T {\n    this._disposables.push(disposable);\n    return disposable;\n  }\n}\n", "/**\n * Copyright (c) 2016 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { ICharset } from 'common/Types';\n\n/**\n * The character sets supported by the terminal. These enable several languages\n * to be represented within the terminal with only 8-bit encoding. See ISO 2022\n * for a discussion on character sets. Only VT100 character sets are supported.\n */\nexport const CHARSETS: { [key: string]: ICharset | undefined } = {};\n\n/**\n * The default character set, US.\n */\nexport const DEFAULT_CHARSET: ICharset | undefined = CHARSETS['B'];\n\n/**\n * DEC Special Character and Line Drawing Set.\n * Reference: http://vt100.net/docs/vt102-ug/table5-13.html\n * A lot of curses apps use this if they see TERM=xterm.\n * testing: echo -e '\\e(0a\\e(B'\n * The xterm output sometimes seems to conflict with the\n * reference above. xterm seems in line with the reference\n * when running vttest however.\n * The table below now uses xterm's output from vttest.\n */\nCHARSETS['0'] = {\n  '`': '\\u25c6', // '\u25C6'\n  'a': '\\u2592', // '\u2592'\n  'b': '\\u2409', // '\u2409' (HT)\n  'c': '\\u240c', // '\u240C' (FF)\n  'd': '\\u240d', // '\u240D' (CR)\n  'e': '\\u240a', // '\u240A' (LF)\n  'f': '\\u00b0', // '\u00B0'\n  'g': '\\u00b1', // '\u00B1'\n  'h': '\\u2424', // '\u2424' (NL)\n  'i': '\\u240b', // '\u240B' (VT)\n  'j': '\\u2518', // '\u2518'\n  'k': '\\u2510', // '\u2510'\n  'l': '\\u250c', // '\u250C'\n  'm': '\\u2514', // '\u2514'\n  'n': '\\u253c', // '\u253C'\n  'o': '\\u23ba', // '\u23BA'\n  'p': '\\u23bb', // '\u23BB'\n  'q': '\\u2500', // '\u2500'\n  'r': '\\u23bc', // '\u23BC'\n  's': '\\u23bd', // '\u23BD'\n  't': '\\u251c', // '\u251C'\n  'u': '\\u2524', // '\u2524'\n  'v': '\\u2534', // '\u2534'\n  'w': '\\u252c', // '\u252C'\n  'x': '\\u2502', // '\u2502'\n  'y': '\\u2264', // '\u2264'\n  'z': '\\u2265', // '\u2265'\n  '{': '\\u03c0', // '\u03C0'\n  '|': '\\u2260', // '\u2260'\n  '}': '\\u00a3', // '\u00A3'\n  '~': '\\u00b7'  // '\u00B7'\n};\n\n/**\n * British character set\n * ESC (A\n * Reference: http://vt100.net/docs/vt220-rm/table2-5.html\n */\nCHARSETS['A'] = {\n  '#': '\u00A3'\n};\n\n/**\n * United States character set\n * ESC (B\n */\nCHARSETS['B'] = undefined;\n\n/**\n * Dutch character set\n * ESC (4\n * Reference: http://vt100.net/docs/vt220-rm/table2-6.html\n */\nCHARSETS['4'] = {\n  '#': '\u00A3',\n  '@': '\u00BE',\n  '[': 'ij',\n  '\\\\': '\u00BD',\n  ']': '|',\n  '{': '\u00A8',\n  '|': 'f',\n  '}': '\u00BC',\n  '~': '\u00B4'\n};\n\n/**\n * Finnish character set\n * ESC (C or ESC (5\n * Reference: http://vt100.net/docs/vt220-rm/table2-7.html\n */\nCHARSETS['C'] =\nCHARSETS['5'] = {\n  '[': '\u00C4',\n  '\\\\': '\u00D6',\n  ']': '\u00C5',\n  '^': '\u00DC',\n  '`': '\u00E9',\n  '{': '\u00E4',\n  '|': '\u00F6',\n  '}': '\u00E5',\n  '~': '\u00FC'\n};\n\n/**\n * French character set\n * ESC (R\n * Reference: http://vt100.net/docs/vt220-rm/table2-8.html\n */\nCHARSETS['R'] = {\n  '#': '\u00A3',\n  '@': '\u00E0',\n  '[': '\u00B0',\n  '\\\\': '\u00E7',\n  ']': '\u00A7',\n  '{': '\u00E9',\n  '|': '\u00F9',\n  '}': '\u00E8',\n  '~': '\u00A8'\n};\n\n/**\n * French Canadian character set\n * ESC (Q\n * Reference: http://vt100.net/docs/vt220-rm/table2-9.html\n */\nCHARSETS['Q'] = {\n  '@': '\u00E0',\n  '[': '\u00E2',\n  '\\\\': '\u00E7',\n  ']': '\u00EA',\n  '^': '\u00EE',\n  '`': '\u00F4',\n  '{': '\u00E9',\n  '|': '\u00F9',\n  '}': '\u00E8',\n  '~': '\u00FB'\n};\n\n/**\n * German character set\n * ESC (K\n * Reference: http://vt100.net/docs/vt220-rm/table2-10.html\n */\nCHARSETS['K'] = {\n  '@': '\u00A7',\n  '[': '\u00C4',\n  '\\\\': '\u00D6',\n  ']': '\u00DC',\n  '{': '\u00E4',\n  '|': '\u00F6',\n  '}': '\u00FC',\n  '~': '\u00DF'\n};\n\n/**\n * Italian character set\n * ESC (Y\n * Reference: http://vt100.net/docs/vt220-rm/table2-11.html\n */\nCHARSETS['Y'] = {\n  '#': '\u00A3',\n  '@': '\u00A7',\n  '[': '\u00B0',\n  '\\\\': '\u00E7',\n  ']': '\u00E9',\n  '`': '\u00F9',\n  '{': '\u00E0',\n  '|': '\u00F2',\n  '}': '\u00E8',\n  '~': '\u00EC'\n};\n\n/**\n * Norwegian/Danish character set\n * ESC (E or ESC (6\n * Reference: http://vt100.net/docs/vt220-rm/table2-12.html\n */\nCHARSETS['E'] =\nCHARSETS['6'] = {\n  '@': '\u00C4',\n  '[': '\u00C6',\n  '\\\\': '\u00D8',\n  ']': '\u00C5',\n  '^': '\u00DC',\n  '`': '\u00E4',\n  '{': '\u00E6',\n  '|': '\u00F8',\n  '}': '\u00E5',\n  '~': '\u00FC'\n};\n\n/**\n * Spanish character set\n * ESC (Z\n * Reference: http://vt100.net/docs/vt220-rm/table2-13.html\n */\nCHARSETS['Z'] = {\n  '#': '\u00A3',\n  '@': '\u00A7',\n  '[': '\u00A1',\n  '\\\\': '\u00D1',\n  ']': '\u00BF',\n  '{': '\u00B0',\n  '|': '\u00F1',\n  '}': '\u00E7'\n};\n\n/**\n * Swedish character set\n * ESC (H or ESC (7\n * Reference: http://vt100.net/docs/vt220-rm/table2-14.html\n */\nCHARSETS['H'] =\nCHARSETS['7'] = {\n  '@': '\u00C9',\n  '[': '\u00C4',\n  '\\\\': '\u00D6',\n  ']': '\u00C5',\n  '^': '\u00DC',\n  '`': '\u00E9',\n  '{': '\u00E4',\n  '|': '\u00F6',\n  '}': '\u00E5',\n  '~': '\u00FC'\n};\n\n/**\n * Swiss character set\n * ESC (=\n * Reference: http://vt100.net/docs/vt220-rm/table2-15.html\n */\nCHARSETS['='] = {\n  '#': '\u00F9',\n  '@': '\u00E0',\n  '[': '\u00E9',\n  '\\\\': '\u00E7',\n  ']': '\u00EA',\n  '^': '\u00EE',\n  // eslint-disable-next-line @typescript-eslint/naming-convention\n  '_': '\u00E8',\n  '`': '\u00F4',\n  '{': '\u00E4',\n  '|': '\u00F6',\n  '}': '\u00FC',\n  '~': '\u00FB'\n};\n", "/**\n * Copyright (c) 2017 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { CircularList, IInsertEvent } from 'common/CircularList';\nimport { IdleTaskQueue } from 'common/TaskQueue';\nimport { IAttributeData, IBufferLine, ICellData, ICharset } from 'common/Types';\nimport { ExtendedAttrs } from 'common/buffer/AttributeData';\nimport { BufferLine, DEFAULT_ATTR_DATA } from 'common/buffer/BufferLine';\nimport { getWrappedLineTrimmedLength, reflowLargerApplyNewLayout, reflowLargerCreateNewLayout, reflowLargerGetLinesToRemove, reflowSmallerGetNewLineLengths } from 'common/buffer/BufferReflow';\nimport { CellData } from 'common/buffer/CellData';\nimport { NULL_CELL_CHAR, NULL_CELL_CODE, NULL_CELL_WIDTH, WHITESPACE_CELL_CHAR, WHITESPACE_CELL_CODE, WHITESPACE_CELL_WIDTH } from 'common/buffer/Constants';\nimport { Marker } from 'common/buffer/Marker';\nimport { IBuffer } from 'common/buffer/Types';\nimport { DEFAULT_CHARSET } from 'common/data/Charsets';\nimport { IBufferService, IOptionsService } from 'common/services/Services';\n\nexport const MAX_BUFFER_SIZE = 4294967295; // 2^32 - 1\n\n/**\n * This class represents a terminal buffer (an internal state of the terminal), where the\n * following information is stored (in high-level):\n *   - text content of this particular buffer\n *   - cursor position\n *   - scroll position\n */\nexport class Buffer implements IBuffer {\n  public lines: CircularList<IBufferLine>;\n  public ydisp: number = 0;\n  public ybase: number = 0;\n  public y: number = 0;\n  public x: number = 0;\n  public scrollBottom: number;\n  public scrollTop: number;\n  public tabs: { [column: number]: boolean | undefined } = {};\n  public savedY: number = 0;\n  public savedX: number = 0;\n  public savedCurAttrData = DEFAULT_ATTR_DATA.clone();\n  public savedCharset: ICharset | undefined = DEFAULT_CHARSET;\n  public markers: Marker[] = [];\n  private _nullCell: ICellData = CellData.fromCharData([0, NULL_CELL_CHAR, NULL_CELL_WIDTH, NULL_CELL_CODE]);\n  private _whitespaceCell: ICellData = CellData.fromCharData([0, WHITESPACE_CELL_CHAR, WHITESPACE_CELL_WIDTH, WHITESPACE_CELL_CODE]);\n  private _cols: number;\n  private _rows: number;\n  private _isClearing: boolean = false;\n\n  constructor(\n    private _hasScrollback: boolean,\n    private _optionsService: IOptionsService,\n    private _bufferService: IBufferService\n  ) {\n    this._cols = this._bufferService.cols;\n    this._rows = this._bufferService.rows;\n    this.lines = new CircularList<IBufferLine>(this._getCorrectBufferLength(this._rows));\n    this.scrollTop = 0;\n    this.scrollBottom = this._rows - 1;\n    this.setupTabStops();\n  }\n\n  public getNullCell(attr?: IAttributeData): ICellData {\n    if (attr) {\n      this._nullCell.fg = attr.fg;\n      this._nullCell.bg = attr.bg;\n      this._nullCell.extended = attr.extended;\n    } else {\n      this._nullCell.fg = 0;\n      this._nullCell.bg = 0;\n      this._nullCell.extended = new ExtendedAttrs();\n    }\n    return this._nullCell;\n  }\n\n  public getWhitespaceCell(attr?: IAttributeData): ICellData {\n    if (attr) {\n      this._whitespaceCell.fg = attr.fg;\n      this._whitespaceCell.bg = attr.bg;\n      this._whitespaceCell.extended = attr.extended;\n    } else {\n      this._whitespaceCell.fg = 0;\n      this._whitespaceCell.bg = 0;\n      this._whitespaceCell.extended = new ExtendedAttrs();\n    }\n    return this._whitespaceCell;\n  }\n\n  public getBlankLine(attr: IAttributeData, isWrapped?: boolean): IBufferLine {\n    return new BufferLine(this._bufferService.cols, this.getNullCell(attr), isWrapped);\n  }\n\n  public get hasScrollback(): boolean {\n    return this._hasScrollback && this.lines.maxLength > this._rows;\n  }\n\n  public get isCursorInViewport(): boolean {\n    const absoluteY = this.ybase + this.y;\n    const relativeY = absoluteY - this.ydisp;\n    return (relativeY >= 0 && relativeY < this._rows);\n  }\n\n  /**\n   * Gets the correct buffer length based on the rows provided, the terminal's\n   * scrollback and whether this buffer is flagged to have scrollback or not.\n   * @param rows The terminal rows to use in the calculation.\n   */\n  private _getCorrectBufferLength(rows: number): number {\n    if (!this._hasScrollback) {\n      return rows;\n    }\n\n    const correctBufferLength = rows + this._optionsService.rawOptions.scrollback;\n\n    return correctBufferLength > MAX_BUFFER_SIZE ? MAX_BUFFER_SIZE : correctBufferLength;\n  }\n\n  /**\n   * Fills the buffer's viewport with blank lines.\n   */\n  public fillViewportRows(fillAttr?: IAttributeData): void {\n    if (this.lines.length === 0) {\n      if (fillAttr === undefined) {\n        fillAttr = DEFAULT_ATTR_DATA;\n      }\n      let i = this._rows;\n      while (i--) {\n        this.lines.push(this.getBlankLine(fillAttr));\n      }\n    }\n  }\n\n  /**\n   * Clears the buffer to it's initial state, discarding all previous data.\n   */\n  public clear(): void {\n    this.ydisp = 0;\n    this.ybase = 0;\n    this.y = 0;\n    this.x = 0;\n    this.lines = new CircularList<IBufferLine>(this._getCorrectBufferLength(this._rows));\n    this.scrollTop = 0;\n    this.scrollBottom = this._rows - 1;\n    this.setupTabStops();\n  }\n\n  /**\n   * Resizes the buffer, adjusting its data accordingly.\n   * @param newCols The new number of columns.\n   * @param newRows The new number of rows.\n   */\n  public resize(newCols: number, newRows: number): void {\n    // store reference to null cell with default attrs\n    const nullCell = this.getNullCell(DEFAULT_ATTR_DATA);\n\n    // count bufferlines with overly big memory to be cleaned afterwards\n    let dirtyMemoryLines = 0;\n\n    // Increase max length if needed before adjustments to allow space to fill\n    // as required.\n    const newMaxLength = this._getCorrectBufferLength(newRows);\n    if (newMaxLength > this.lines.maxLength) {\n      this.lines.maxLength = newMaxLength;\n    }\n\n    // if (this._cols > newCols) {\n    //   console.log('increase!');\n    // }\n\n    // The following adjustments should only happen if the buffer has been\n    // initialized/filled.\n    if (this.lines.length > 0) {\n      // Deal with columns increasing (reducing needs to happen after reflow)\n      if (this._cols < newCols) {\n        for (let i = 0; i < this.lines.length; i++) {\n          // +boolean for fast 0 or 1 conversion\n          dirtyMemoryLines += +this.lines.get(i)!.resize(newCols, nullCell);\n        }\n      }\n\n      // Resize rows in both directions as needed\n      let addToY = 0;\n      if (this._rows < newRows) {\n        for (let y = this._rows; y < newRows; y++) {\n          if (this.lines.length < newRows + this.ybase) {\n            if (this._optionsService.rawOptions.windowsMode || this._optionsService.rawOptions.windowsPty.backend !== undefined || this._optionsService.rawOptions.windowsPty.buildNumber !== undefined) {\n              // Just add the new missing rows on Windows as conpty reprints the screen with it's\n              // view of the world. Once a line enters scrollback for conpty it remains there\n              this.lines.push(new BufferLine(newCols, nullCell));\n            } else {\n              if (this.ybase > 0 && this.lines.length <= this.ybase + this.y + addToY + 1) {\n                // There is room above the buffer and there are no empty elements below the line,\n                // scroll up\n                this.ybase--;\n                addToY++;\n                if (this.ydisp > 0) {\n                  // Viewport is at the top of the buffer, must increase downwards\n                  this.ydisp--;\n                }\n              } else {\n                // Add a blank line if there is no buffer left at the top to scroll to, or if there\n                // are blank lines after the cursor\n                this.lines.push(new BufferLine(newCols, nullCell));\n              }\n            }\n          }\n        }\n      } else { // (this._rows >= newRows)\n        for (let y = this._rows; y > newRows; y--) {\n          if (this.lines.length > newRows + this.ybase) {\n            if (this.lines.length > this.ybase + this.y + 1) {\n              // The line is a blank line below the cursor, remove it\n              this.lines.pop();\n            } else {\n              // The line is the cursor, scroll down\n              this.ybase++;\n              this.ydisp++;\n            }\n          }\n        }\n      }\n\n      // Reduce max length if needed after adjustments, this is done after as it\n      // would otherwise cut data from the bottom of the buffer.\n      if (newMaxLength < this.lines.maxLength) {\n        // Trim from the top of the buffer and adjust ybase and ydisp.\n        const amountToTrim = this.lines.length - newMaxLength;\n        if (amountToTrim > 0) {\n          this.lines.trimStart(amountToTrim);\n          this.ybase = Math.max(this.ybase - amountToTrim, 0);\n          this.ydisp = Math.max(this.ydisp - amountToTrim, 0);\n          this.savedY = Math.max(this.savedY - amountToTrim, 0);\n        }\n        this.lines.maxLength = newMaxLength;\n      }\n\n      // Make sure that the cursor stays on screen\n      this.x = Math.min(this.x, newCols - 1);\n      this.y = Math.min(this.y, newRows - 1);\n      if (addToY) {\n        this.y += addToY;\n      }\n      this.savedX = Math.min(this.savedX, newCols - 1);\n\n      this.scrollTop = 0;\n    }\n\n    this.scrollBottom = newRows - 1;\n\n    if (this._isReflowEnabled) {\n      this._reflow(newCols, newRows);\n\n      // Trim the end of the line off if cols shrunk\n      if (this._cols > newCols) {\n        for (let i = 0; i < this.lines.length; i++) {\n          // +boolean for fast 0 or 1 conversion\n          dirtyMemoryLines += +this.lines.get(i)!.resize(newCols, nullCell);\n        }\n      }\n    }\n\n    this._cols = newCols;\n    this._rows = newRows;\n\n    this._memoryCleanupQueue.clear();\n    // schedule memory cleanup only, if more than 10% of the lines are affected\n    if (dirtyMemoryLines > 0.1 * this.lines.length) {\n      this._memoryCleanupPosition = 0;\n      this._memoryCleanupQueue.enqueue(() => this._batchedMemoryCleanup());\n    }\n  }\n\n  private _memoryCleanupQueue = new IdleTaskQueue();\n  private _memoryCleanupPosition = 0;\n\n  private _batchedMemoryCleanup(): boolean {\n    let normalRun = true;\n    if (this._memoryCleanupPosition >= this.lines.length) {\n      // cleanup made it once through all lines, thus rescan in loop below to also catch shifted\n      // lines, which should finish rather quick if there are no more cleanups pending\n      this._memoryCleanupPosition = 0;\n      normalRun = false;\n    }\n    let counted = 0;\n    while (this._memoryCleanupPosition < this.lines.length) {\n      counted += this.lines.get(this._memoryCleanupPosition++)!.cleanupMemory();\n      // cleanup max 100 lines per batch\n      if (counted > 100) {\n        return true;\n      }\n    }\n    // normal runs always need another rescan afterwards\n    // if we made it here with normalRun=false, we are in a final run\n    // and can end the cleanup task for sure\n    return normalRun;\n  }\n\n  private get _isReflowEnabled(): boolean {\n    const windowsPty = this._optionsService.rawOptions.windowsPty;\n    if (windowsPty && windowsPty.buildNumber) {\n      return this._hasScrollback && windowsPty.backend === 'conpty' && windowsPty.buildNumber >= 21376;\n    }\n    return this._hasScrollback && !this._optionsService.rawOptions.windowsMode;\n  }\n\n  private _reflow(newCols: number, newRows: number): void {\n    if (this._cols === newCols) {\n      return;\n    }\n\n    // Iterate through rows, ignore the last one as it cannot be wrapped\n    if (newCols > this._cols) {\n      this._reflowLarger(newCols, newRows);\n    } else {\n      this._reflowSmaller(newCols, newRows);\n    }\n  }\n\n  private _reflowLarger(newCols: number, newRows: number): void {\n    const reflowCursorLine = this._optionsService.rawOptions.reflowCursorLine;\n    const toRemove: number[] = reflowLargerGetLinesToRemove(this.lines, this._cols, newCols, this.ybase + this.y, this.getNullCell(DEFAULT_ATTR_DATA), reflowCursorLine);\n    if (toRemove.length > 0) {\n      const newLayoutResult = reflowLargerCreateNewLayout(this.lines, toRemove);\n      reflowLargerApplyNewLayout(this.lines, newLayoutResult.layout);\n      this._reflowLargerAdjustViewport(newCols, newRows, newLayoutResult.countRemoved);\n    }\n  }\n\n  private _reflowLargerAdjustViewport(newCols: number, newRows: number, countRemoved: number): void {\n    const nullCell = this.getNullCell(DEFAULT_ATTR_DATA);\n    // Adjust viewport based on number of items removed\n    let viewportAdjustments = countRemoved;\n    while (viewportAdjustments-- > 0) {\n      if (this.ybase === 0) {\n        if (this.y > 0) {\n          this.y--;\n        }\n        if (this.lines.length < newRows) {\n          // Add an extra row at the bottom of the viewport\n          this.lines.push(new BufferLine(newCols, nullCell));\n        }\n      } else {\n        if (this.ydisp === this.ybase) {\n          this.ydisp--;\n        }\n        this.ybase--;\n      }\n    }\n    this.savedY = Math.max(this.savedY - countRemoved, 0);\n  }\n\n  private _reflowSmaller(newCols: number, newRows: number): void {\n    const reflowCursorLine = this._optionsService.rawOptions.reflowCursorLine;\n    const nullCell = this.getNullCell(DEFAULT_ATTR_DATA);\n    // Gather all BufferLines that need to be inserted into the Buffer here so that they can be\n    // batched up and only committed once\n    const toInsert = [];\n    let countToInsert = 0;\n    // Go backwards as many lines may be trimmed and this will avoid considering them\n    for (let y = this.lines.length - 1; y >= 0; y--) {\n      // Check whether this line is a problem\n      let nextLine = this.lines.get(y) as BufferLine;\n      if (!nextLine || !nextLine.isWrapped && nextLine.getTrimmedLength() <= newCols) {\n        continue;\n      }\n\n      // Gather wrapped lines and adjust y to be the starting line\n      const wrappedLines: BufferLine[] = [nextLine];\n      while (nextLine.isWrapped && y > 0) {\n        nextLine = this.lines.get(--y) as BufferLine;\n        wrappedLines.unshift(nextLine);\n      }\n\n      if (!reflowCursorLine) {\n        // If these lines contain the cursor don't touch them, the program will handle fixing up\n        // wrapped lines with the cursor\n        const absoluteY = this.ybase + this.y;\n        if (absoluteY >= y && absoluteY < y + wrappedLines.length) {\n          continue;\n        }\n      }\n\n      const lastLineLength = wrappedLines[wrappedLines.length - 1].getTrimmedLength();\n      const destLineLengths = reflowSmallerGetNewLineLengths(wrappedLines, this._cols, newCols);\n      const linesToAdd = destLineLengths.length - wrappedLines.length;\n      let trimmedLines: number;\n      if (this.ybase === 0 && this.y !== this.lines.length - 1) {\n        // If the top section of the buffer is not yet filled\n        trimmedLines = Math.max(0, this.y - this.lines.maxLength + linesToAdd);\n      } else {\n        trimmedLines = Math.max(0, this.lines.length - this.lines.maxLength + linesToAdd);\n      }\n\n      // Add the new lines\n      const newLines: BufferLine[] = [];\n      for (let i = 0; i < linesToAdd; i++) {\n        const newLine = this.getBlankLine(DEFAULT_ATTR_DATA, true) as BufferLine;\n        newLines.push(newLine);\n      }\n      if (newLines.length > 0) {\n        toInsert.push({\n          // countToInsert here gets the actual index, taking into account other inserted items.\n          // using this we can iterate through the list forwards\n          start: y + wrappedLines.length + countToInsert,\n          newLines\n        });\n        countToInsert += newLines.length;\n      }\n      wrappedLines.push(...newLines);\n\n      // Copy buffer data to new locations, this needs to happen backwards to do in-place\n      let destLineIndex = destLineLengths.length - 1; // Math.floor(cellsNeeded / newCols);\n      let destCol = destLineLengths[destLineIndex]; // cellsNeeded % newCols;\n      if (destCol === 0) {\n        destLineIndex--;\n        destCol = destLineLengths[destLineIndex];\n      }\n      let srcLineIndex = wrappedLines.length - linesToAdd - 1;\n      let srcCol = lastLineLength;\n      while (srcLineIndex >= 0) {\n        const cellsToCopy = Math.min(srcCol, destCol);\n        if (wrappedLines[destLineIndex] === undefined) {\n          // Sanity check that the line exists, this has been known to fail for an unknown reason\n          // which would stop the reflow from happening if an exception would throw.\n          break;\n        }\n        wrappedLines[destLineIndex].copyCellsFrom(wrappedLines[srcLineIndex], srcCol - cellsToCopy, destCol - cellsToCopy, cellsToCopy, true);\n        destCol -= cellsToCopy;\n        if (destCol === 0) {\n          destLineIndex--;\n          destCol = destLineLengths[destLineIndex];\n        }\n        srcCol -= cellsToCopy;\n        if (srcCol === 0) {\n          srcLineIndex--;\n          const wrappedLinesIndex = Math.max(srcLineIndex, 0);\n          srcCol = getWrappedLineTrimmedLength(wrappedLines, wrappedLinesIndex, this._cols);\n        }\n      }\n\n      // Null out the end of the line ends if a wide character wrapped to the following line\n      for (let i = 0; i < wrappedLines.length; i++) {\n        if (destLineLengths[i] < newCols) {\n          wrappedLines[i].setCell(destLineLengths[i], nullCell);\n        }\n      }\n\n      // Adjust viewport as needed\n      let viewportAdjustments = linesToAdd - trimmedLines;\n      while (viewportAdjustments-- > 0) {\n        if (this.ybase === 0) {\n          if (this.y < newRows - 1) {\n            this.y++;\n            this.lines.pop();\n          } else {\n            this.ybase++;\n            this.ydisp++;\n          }\n        } else {\n          // Ensure ybase does not exceed its maximum value\n          if (this.ybase < Math.min(this.lines.maxLength, this.lines.length + countToInsert) - newRows) {\n            if (this.ybase === this.ydisp) {\n              this.ydisp++;\n            }\n            this.ybase++;\n          }\n        }\n      }\n      this.savedY = Math.min(this.savedY + linesToAdd, this.ybase + newRows - 1);\n    }\n\n    // Rearrange lines in the buffer if there are any insertions, this is done at the end rather\n    // than earlier so that it's a single O(n) pass through the buffer, instead of O(n^2) from many\n    // costly calls to CircularList.splice.\n    if (toInsert.length > 0) {\n      // Record buffer insert events and then play them back backwards so that the indexes are\n      // correct\n      const insertEvents: IInsertEvent[] = [];\n\n      // Record original lines so they don't get overridden when we rearrange the list\n      const originalLines: BufferLine[] = [];\n      for (let i = 0; i < this.lines.length; i++) {\n        originalLines.push(this.lines.get(i) as BufferLine);\n      }\n      const originalLinesLength = this.lines.length;\n\n      let originalLineIndex = originalLinesLength - 1;\n      let nextToInsertIndex = 0;\n      let nextToInsert = toInsert[nextToInsertIndex];\n      this.lines.length = Math.min(this.lines.maxLength, this.lines.length + countToInsert);\n      let countInsertedSoFar = 0;\n      for (let i = Math.min(this.lines.maxLength - 1, originalLinesLength + countToInsert - 1); i >= 0; i--) {\n        if (nextToInsert && nextToInsert.start > originalLineIndex + countInsertedSoFar) {\n          // Insert extra lines here, adjusting i as needed\n          for (let nextI = nextToInsert.newLines.length - 1; nextI >= 0; nextI--) {\n            this.lines.set(i--, nextToInsert.newLines[nextI]);\n          }\n          i++;\n\n          // Create insert events for later\n          insertEvents.push({\n            index: originalLineIndex + 1,\n            amount: nextToInsert.newLines.length\n          });\n\n          countInsertedSoFar += nextToInsert.newLines.length;\n          nextToInsert = toInsert[++nextToInsertIndex];\n        } else {\n          this.lines.set(i, originalLines[originalLineIndex--]);\n        }\n      }\n\n      // Update markers\n      let insertCountEmitted = 0;\n      for (let i = insertEvents.length - 1; i >= 0; i--) {\n        insertEvents[i].index += insertCountEmitted;\n        this.lines.onInsertEmitter.fire(insertEvents[i]);\n        insertCountEmitted += insertEvents[i].amount;\n      }\n      const amountToTrim = Math.max(0, originalLinesLength + countToInsert - this.lines.maxLength);\n      if (amountToTrim > 0) {\n        this.lines.onTrimEmitter.fire(amountToTrim);\n      }\n    }\n  }\n\n  /**\n   * Translates a buffer line to a string, with optional start and end columns.\n   * Wide characters will count as two columns in the resulting string. This\n   * function is useful for getting the actual text underneath the raw selection\n   * position.\n   * @param lineIndex The absolute index of the line being translated.\n   * @param trimRight Whether to trim whitespace to the right.\n   * @param startCol The column to start at.\n   * @param endCol The column to end at.\n   */\n  public translateBufferLineToString(lineIndex: number, trimRight: boolean, startCol: number = 0, endCol?: number): string {\n    const line = this.lines.get(lineIndex);\n    if (!line) {\n      return '';\n    }\n    return line.translateToString(trimRight, startCol, endCol);\n  }\n\n  public getWrappedRangeForLine(y: number): { first: number, last: number } {\n    let first = y;\n    let last = y;\n    // Scan upwards for wrapped lines\n    while (first > 0 && this.lines.get(first)!.isWrapped) {\n      first--;\n    }\n    // Scan downwards for wrapped lines\n    while (last + 1 < this.lines.length && this.lines.get(last + 1)!.isWrapped) {\n      last++;\n    }\n    return { first, last };\n  }\n\n  /**\n   * Setup the tab stops.\n   * @param i The index to start setting up tab stops from.\n   */\n  public setupTabStops(i?: number): void {\n    if (i !== null && i !== undefined) {\n      if (!this.tabs[i]) {\n        i = this.prevStop(i);\n      }\n    } else {\n      this.tabs = {};\n      i = 0;\n    }\n\n    for (; i < this._cols; i += this._optionsService.rawOptions.tabStopWidth) {\n      this.tabs[i] = true;\n    }\n  }\n\n  /**\n   * Move the cursor to the previous tab stop from the given position (default is current).\n   * @param x The position to move the cursor to the previous tab stop.\n   */\n  public prevStop(x?: number): number {\n    if (x === null || x === undefined) {\n      x = this.x;\n    }\n    while (!this.tabs[--x] && x > 0);\n    return x >= this._cols ? this._cols - 1 : x < 0 ? 0 : x;\n  }\n\n  /**\n   * Move the cursor one tab stop forward from the given position (default is current).\n   * @param x The position to move the cursor one tab stop forward.\n   */\n  public nextStop(x?: number): number {\n    if (x === null || x === undefined) {\n      x = this.x;\n    }\n    while (!this.tabs[++x] && x < this._cols);\n    return x >= this._cols ? this._cols - 1 : x < 0 ? 0 : x;\n  }\n\n  /**\n   * Clears markers on single line.\n   * @param y The line to clear.\n   */\n  public clearMarkers(y: number): void {\n    this._isClearing = true;\n    for (let i = 0; i < this.markers.length; i++) {\n      if (this.markers[i].line === y) {\n        this.markers[i].dispose();\n        this.markers.splice(i--, 1);\n      }\n    }\n    this._isClearing = false;\n  }\n\n  /**\n   * Clears markers on all lines\n   */\n  public clearAllMarkers(): void {\n    this._isClearing = true;\n    for (let i = 0; i < this.markers.length; i++) {\n      this.markers[i].dispose();\n    }\n    this.markers.length = 0;\n    this._isClearing = false;\n  }\n\n  public addMarker(y: number): Marker {\n    const marker = new Marker(y);\n    this.markers.push(marker);\n    marker.register(this.lines.onTrim(amount => {\n      marker.line -= amount;\n      // The marker should be disposed when the line is trimmed from the buffer\n      if (marker.line < 0) {\n        marker.dispose();\n      }\n    }));\n    marker.register(this.lines.onInsert(event => {\n      if (marker.line >= event.index) {\n        marker.line += event.amount;\n      }\n    }));\n    marker.register(this.lines.onDelete(event => {\n      // Delete the marker if it's within the range\n      if (marker.line >= event.index && marker.line < event.index + event.amount) {\n        marker.dispose();\n      }\n\n      // Shift the marker if it's after the deleted range\n      if (marker.line > event.index) {\n        marker.line -= event.amount;\n      }\n    }));\n    marker.register(marker.onDispose(() => this._removeMarker(marker)));\n    return marker;\n  }\n\n  private _removeMarker(marker: Marker): void {\n    if (!this._isClearing) {\n      this.markers.splice(this.markers.indexOf(marker), 1);\n    }\n  }\n}\n", "/**\n * Copyright (c) 2017 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { Disposable } from 'vs/base/common/lifecycle';\nimport { IAttributeData } from 'common/Types';\nimport { Buffer } from 'common/buffer/Buffer';\nimport { IBuffer, IBufferSet } from 'common/buffer/Types';\nimport { IBufferService, IOptionsService } from 'common/services/Services';\nimport { Emitter } from 'vs/base/common/event';\n\n/**\n * The BufferSet represents the set of two buffers used by xterm terminals (normal and alt) and\n * provides also utilities for working with them.\n */\nexport class BufferSet extends Disposable implements IBufferSet {\n  private _normal!: Buffer;\n  private _alt!: Buffer;\n  private _activeBuffer!: Buffer;\n\n  private readonly _onBufferActivate = this._register(new Emitter<{ activeBuffer: IBuffer, inactiveBuffer: IBuffer }>());\n  public readonly onBufferActivate = this._onBufferActivate.event;\n\n  /**\n   * Create a new BufferSet for the given terminal.\n   */\n  constructor(\n    private readonly _optionsService: IOptionsService,\n    private readonly _bufferService: IBufferService\n  ) {\n    super();\n    this.reset();\n    this._register(this._optionsService.onSpecificOptionChange('scrollback', () => this.resize(this._bufferService.cols, this._bufferService.rows)));\n    this._register(this._optionsService.onSpecificOptionChange('tabStopWidth', () => this.setupTabStops()));\n  }\n\n  public reset(): void {\n    this._normal = new Buffer(true, this._optionsService, this._bufferService);\n    this._normal.fillViewportRows();\n\n    // The alt buffer should never have scrollback.\n    // See http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-The-Alternate-Screen-Buffer\n    this._alt = new Buffer(false, this._optionsService, this._bufferService);\n    this._activeBuffer = this._normal;\n    this._onBufferActivate.fire({\n      activeBuffer: this._normal,\n      inactiveBuffer: this._alt\n    });\n\n    this.setupTabStops();\n  }\n\n  /**\n   * Returns the alt Buffer of the BufferSet\n   */\n  public get alt(): Buffer {\n    return this._alt;\n  }\n\n  /**\n   * Returns the currently active Buffer of the BufferSet\n   */\n  public get active(): Buffer {\n    return this._activeBuffer;\n  }\n\n  /**\n   * Returns the normal Buffer of the BufferSet\n   */\n  public get normal(): Buffer {\n    return this._normal;\n  }\n\n  /**\n   * Sets the normal Buffer of the BufferSet as its currently active Buffer\n   */\n  public activateNormalBuffer(): void {\n    if (this._activeBuffer === this._normal) {\n      return;\n    }\n    this._normal.x = this._alt.x;\n    this._normal.y = this._alt.y;\n    // The alt buffer should always be cleared when we switch to the normal\n    // buffer. This frees up memory since the alt buffer should always be new\n    // when activated.\n    this._alt.clearAllMarkers();\n    this._alt.clear();\n    this._activeBuffer = this._normal;\n    this._onBufferActivate.fire({\n      activeBuffer: this._normal,\n      inactiveBuffer: this._alt\n    });\n  }\n\n  /**\n   * Sets the alt Buffer of the BufferSet as its currently active Buffer\n   */\n  public activateAltBuffer(fillAttr?: IAttributeData): void {\n    if (this._activeBuffer === this._alt) {\n      return;\n    }\n    // Since the alt buffer is always cleared when the normal buffer is\n    // activated, we want to fill it when switching to it.\n    this._alt.fillViewportRows(fillAttr);\n    this._alt.x = this._normal.x;\n    this._alt.y = this._normal.y;\n    this._activeBuffer = this._alt;\n    this._onBufferActivate.fire({\n      activeBuffer: this._alt,\n      inactiveBuffer: this._normal\n    });\n  }\n\n  /**\n   * Resizes both normal and alt buffers, adjusting their data accordingly.\n   * @param newCols The new number of columns.\n   * @param newRows The new number of rows.\n   */\n  public resize(newCols: number, newRows: number): void {\n    this._normal.resize(newCols, newRows);\n    this._alt.resize(newCols, newRows);\n    this.setupTabStops(newCols);\n  }\n\n  /**\n   * Setup the tab stops.\n   * @param i The index to start setting up tab stops from.\n   */\n  public setupTabStops(i?: number): void {\n    this._normal.setupTabStops(i);\n    this._alt.setupTabStops(i);\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { Disposable } from 'vs/base/common/lifecycle';\nimport { IAttributeData, IBufferLine } from 'common/Types';\nimport { BufferSet } from 'common/buffer/BufferSet';\nimport { IBuffer, IBufferSet } from 'common/buffer/Types';\nimport { IBufferService, IOptionsService } from 'common/services/Services';\nimport { Emitter } from 'vs/base/common/event';\n\nexport const MINIMUM_COLS = 2; // Less than 2 can mess with wide chars\nexport const MINIMUM_ROWS = 1;\n\nexport class BufferService extends Disposable implements IBufferService {\n  public serviceBrand: any;\n\n  public cols: number;\n  public rows: number;\n  public buffers: IBufferSet;\n  /** Whether the user is scrolling (locks the scroll position) */\n  public isUserScrolling: boolean = false;\n\n  private readonly _onResize = this._register(new Emitter<{ cols: number, rows: number }>());\n  public readonly onResize = this._onResize.event;\n  private readonly _onScroll = this._register(new Emitter<number>());\n  public readonly onScroll = this._onScroll.event;\n\n  public get buffer(): IBuffer { return this.buffers.active; }\n\n  /** An IBufferline to clone/copy from for new blank lines */\n  private _cachedBlankLine: IBufferLine | undefined;\n\n  constructor(@IOptionsService optionsService: IOptionsService) {\n    super();\n    this.cols = Math.max(optionsService.rawOptions.cols || 0, MINIMUM_COLS);\n    this.rows = Math.max(optionsService.rawOptions.rows || 0, MINIMUM_ROWS);\n    this.buffers = this._register(new BufferSet(optionsService, this));\n  }\n\n  public resize(cols: number, rows: number): void {\n    this.cols = cols;\n    this.rows = rows;\n    this.buffers.resize(cols, rows);\n    // TODO: This doesn't fire when scrollback changes - add a resize event to BufferSet and forward\n    //       event\n    this._onResize.fire({ cols, rows });\n  }\n\n  public reset(): void {\n    this.buffers.reset();\n    this.isUserScrolling = false;\n  }\n\n  /**\n   * Scroll the terminal down 1 row, creating a blank line.\n   * @param eraseAttr The attribute data to use the for blank line.\n   * @param isWrapped Whether the new line is wrapped from the previous line.\n   */\n  public scroll(eraseAttr: IAttributeData, isWrapped: boolean = false): void {\n    const buffer = this.buffer;\n\n    let newLine: IBufferLine | undefined;\n    newLine = this._cachedBlankLine;\n    if (!newLine || newLine.length !== this.cols || newLine.getFg(0) !== eraseAttr.fg || newLine.getBg(0) !== eraseAttr.bg) {\n      newLine = buffer.getBlankLine(eraseAttr, isWrapped);\n      this._cachedBlankLine = newLine;\n    }\n    newLine.isWrapped = isWrapped;\n\n    const topRow = buffer.ybase + buffer.scrollTop;\n    const bottomRow = buffer.ybase + buffer.scrollBottom;\n\n    if (buffer.scrollTop === 0) {\n      // Determine whether the buffer is going to be trimmed after insertion.\n      const willBufferBeTrimmed = buffer.lines.isFull;\n\n      // Insert the line using the fastest method\n      if (bottomRow === buffer.lines.length - 1) {\n        if (willBufferBeTrimmed) {\n          buffer.lines.recycle().copyFrom(newLine);\n        } else {\n          buffer.lines.push(newLine.clone());\n        }\n      } else {\n        buffer.lines.splice(bottomRow + 1, 0, newLine.clone());\n      }\n\n      // Only adjust ybase and ydisp when the buffer is not trimmed\n      if (!willBufferBeTrimmed) {\n        buffer.ybase++;\n        // Only scroll the ydisp with ybase if the user has not scrolled up\n        if (!this.isUserScrolling) {\n          buffer.ydisp++;\n        }\n      } else {\n        // When the buffer is full and the user has scrolled up, keep the text\n        // stable unless ydisp is right at the top\n        if (this.isUserScrolling) {\n          buffer.ydisp = Math.max(buffer.ydisp - 1, 0);\n        }\n      }\n    } else {\n      // scrollTop is non-zero which means no line will be going to the\n      // scrollback, instead we can just shift them in-place.\n      const scrollRegionHeight = bottomRow - topRow + 1 /* as it's zero-based */;\n      buffer.lines.shiftElements(topRow + 1, scrollRegionHeight - 1, -1);\n      buffer.lines.set(bottomRow, newLine.clone());\n    }\n\n    // Move the viewport to the bottom of the buffer unless the user is\n    // scrolling.\n    if (!this.isUserScrolling) {\n      buffer.ydisp = buffer.ybase;\n    }\n\n    this._onScroll.fire(buffer.ydisp);\n  }\n\n  /**\n   * Scroll the display of the terminal\n   * @param disp The number of lines to scroll down (negative scroll up).\n   * @param suppressScrollEvent Don't emit the scroll event as scrollLines. This is used\n   * to avoid unwanted events being handled by the viewport when the event was triggered from the\n   * viewport originally.\n   */\n  public scrollLines(disp: number, suppressScrollEvent?: boolean): void {\n    const buffer = this.buffer;\n    if (disp < 0) {\n      if (buffer.ydisp === 0) {\n        return;\n      }\n      this.isUserScrolling = true;\n    } else if (disp + buffer.ydisp >= buffer.ybase) {\n      this.isUserScrolling = false;\n    }\n\n    const oldYdisp = buffer.ydisp;\n    buffer.ydisp = Math.max(Math.min(buffer.ydisp + disp, buffer.ybase), 0);\n\n    // No change occurred, don't trigger scroll/refresh\n    if (oldYdisp === buffer.ydisp) {\n      return;\n    }\n\n    if (!suppressScrollEvent) {\n      this._onScroll.fire(buffer.ydisp);\n    }\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { Disposable, toDisposable } from 'vs/base/common/lifecycle';\nimport { isMac } from 'common/Platform';\nimport { CursorStyle, IDisposable } from 'common/Types';\nimport { FontWeight, IOptionsService, ITerminalOptions } from 'common/services/Services';\nimport { Emitter } from 'vs/base/common/event';\n\nexport const DEFAULT_OPTIONS: Readonly<Required<ITerminalOptions>> = {\n  cols: 80,\n  rows: 24,\n  cursorBlink: false,\n  cursorStyle: 'block',\n  cursorWidth: 1,\n  cursorInactiveStyle: 'outline',\n  customGlyphs: true,\n  drawBoldTextInBrightColors: true,\n  documentOverride: null,\n  fastScrollModifier: 'alt',\n  fastScrollSensitivity: 5,\n  fontFamily: 'monospace',\n  fontSize: 15,\n  fontWeight: 'normal',\n  fontWeightBold: 'bold',\n  ignoreBracketedPasteMode: false,\n  lineHeight: 1.0,\n  letterSpacing: 0,\n  linkHandler: null,\n  logLevel: 'info',\n  logger: null,\n  scrollback: 1000,\n  scrollOnUserInput: true,\n  scrollSensitivity: 1,\n  screenReaderMode: false,\n  smoothScrollDuration: 0,\n  macOptionIsMeta: false,\n  macOptionClickForcesSelection: false,\n  minimumContrastRatio: 1,\n  disableStdin: false,\n  allowProposedApi: false,\n  allowTransparency: false,\n  tabStopWidth: 8,\n  theme: {},\n  reflowCursorLine: false,\n  rescaleOverlappingGlyphs: false,\n  rightClickSelectsWord: isMac,\n  windowOptions: {},\n  windowsMode: false,\n  windowsPty: {},\n  wordSeparator: ' ()[]{}\\',\"`',\n  altClickMovesCursor: true,\n  convertEol: false,\n  termName: 'xterm',\n  cancelEvents: false,\n  overviewRuler: {}\n};\n\nconst FONT_WEIGHT_OPTIONS: Extract<FontWeight, string>[] = ['normal', 'bold', '100', '200', '300', '400', '500', '600', '700', '800', '900'];\n\nexport class OptionsService extends Disposable implements IOptionsService {\n  public serviceBrand: any;\n\n  public readonly rawOptions: Required<ITerminalOptions>;\n  public options: Required<ITerminalOptions>;\n\n  private readonly _onOptionChange = this._register(new Emitter<keyof ITerminalOptions>());\n  public readonly onOptionChange = this._onOptionChange.event;\n\n  constructor(options: Partial<ITerminalOptions>) {\n    super();\n    // set the default value of each option\n    const defaultOptions = { ...DEFAULT_OPTIONS };\n    for (const key in options) {\n      if (key in defaultOptions) {\n        try {\n          const newValue = options[key];\n          defaultOptions[key] = this._sanitizeAndValidateOption(key, newValue);\n        } catch (e) {\n          console.error(e);\n        }\n      }\n    }\n\n    // set up getters and setters for each option\n    this.rawOptions = defaultOptions;\n    this.options = { ... defaultOptions };\n    this._setupOptions();\n\n    // Clear out options that could link outside xterm.js as they could easily cause an embedder\n    // memory leak\n    this._register(toDisposable(() => {\n      this.rawOptions.linkHandler = null;\n      this.rawOptions.documentOverride = null;\n    }));\n  }\n\n  // eslint-disable-next-line @typescript-eslint/naming-convention\n  public onSpecificOptionChange<T extends keyof ITerminalOptions>(key: T, listener: (value: ITerminalOptions[T]) => any): IDisposable {\n    return this.onOptionChange(eventKey => {\n      if (eventKey === key) {\n        listener(this.rawOptions[key]);\n      }\n    });\n  }\n\n  // eslint-disable-next-line @typescript-eslint/naming-convention\n  public onMultipleOptionChange(keys: (keyof ITerminalOptions)[], listener: () => any): IDisposable {\n    return this.onOptionChange(eventKey => {\n      if (keys.indexOf(eventKey) !== -1) {\n        listener();\n      }\n    });\n  }\n\n  private _setupOptions(): void {\n    const getter = (propName: string): any => {\n      if (!(propName in DEFAULT_OPTIONS)) {\n        throw new Error(`No option with key \"${propName}\"`);\n      }\n      return this.rawOptions[propName];\n    };\n\n    const setter = (propName: string, value: any): void => {\n      if (!(propName in DEFAULT_OPTIONS)) {\n        throw new Error(`No option with key \"${propName}\"`);\n      }\n\n      value = this._sanitizeAndValidateOption(propName, value);\n      // Don't fire an option change event if they didn't change\n      if (this.rawOptions[propName] !== value) {\n        this.rawOptions[propName] = value;\n        this._onOptionChange.fire(propName);\n      }\n    };\n\n    for (const propName in this.rawOptions) {\n      const desc = {\n        get: getter.bind(this, propName),\n        set: setter.bind(this, propName)\n      };\n      Object.defineProperty(this.options, propName, desc);\n    }\n  }\n\n  private _sanitizeAndValidateOption(key: string, value: any): any {\n    switch (key) {\n      case 'cursorStyle':\n        if (!value) {\n          value = DEFAULT_OPTIONS[key];\n        }\n        if (!isCursorStyle(value)) {\n          throw new Error(`\"${value}\" is not a valid value for ${key}`);\n        }\n        break;\n      case 'wordSeparator':\n        if (!value) {\n          value = DEFAULT_OPTIONS[key];\n        }\n        break;\n      case 'fontWeight':\n      case 'fontWeightBold':\n        if (typeof value === 'number' && 1 <= value && value <= 1000) {\n          // already valid numeric value\n          break;\n        }\n        value = FONT_WEIGHT_OPTIONS.includes(value) ? value : DEFAULT_OPTIONS[key];\n        break;\n      case 'cursorWidth':\n        value = Math.floor(value);\n        // Fall through for bounds check\n      case 'lineHeight':\n      case 'tabStopWidth':\n        if (value < 1) {\n          throw new Error(`${key} cannot be less than 1, value: ${value}`);\n        }\n        break;\n      case 'minimumContrastRatio':\n        value = Math.max(1, Math.min(21, Math.round(value * 10) / 10));\n        break;\n      case 'scrollback':\n        value = Math.min(value, 4294967295);\n        if (value < 0) {\n          throw new Error(`${key} cannot be less than 0, value: ${value}`);\n        }\n        break;\n      case 'fastScrollSensitivity':\n      case 'scrollSensitivity':\n        if (value <= 0) {\n          throw new Error(`${key} cannot be less than or equal to 0, value: ${value}`);\n        }\n        break;\n      case 'rows':\n      case 'cols':\n        if (!value && value !== 0) {\n          throw new Error(`${key} must be numeric, value: ${value}`);\n        }\n        break;\n      case 'windowsPty':\n        value = value ?? {};\n        break;\n    }\n    return value;\n  }\n}\n\nfunction isCursorStyle(value: unknown): value is CursorStyle {\n  return value === 'block' || value === 'underline' || value === 'bar';\n}\n", "/**\n * Copyright (c) 2016 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\n/*\n * A simple utility for cloning values\n */\nexport function clone<T>(val: T, depth: number = 5): T {\n  if (typeof val !== 'object') {\n    return val;\n  }\n\n  // If we're cloning an array, use an array as the base, otherwise use an object\n  const clonedObject: any = Array.isArray(val) ? [] : {};\n\n  for (const key in val) {\n    // Recursively clone eack item unless we're at the maximum depth\n    clonedObject[key] = depth <= 1 ? val[key] : (val[key] && clone(val[key], depth - 1));\n  }\n\n  return clonedObject as T;\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { clone } from 'common/Clone';\nimport { Disposable } from 'vs/base/common/lifecycle';\nimport { IDecPrivateModes, IModes } from 'common/Types';\nimport { IBufferService, ICoreService, ILogService, IOptionsService } from 'common/services/Services';\nimport { Emitter } from 'vs/base/common/event';\n\nconst DEFAULT_MODES: IModes = Object.freeze({\n  insertMode: false\n});\n\nconst DEFAULT_DEC_PRIVATE_MODES: IDecPrivateModes = Object.freeze({\n  applicationCursorKeys: false,\n  applicationKeypad: false,\n  bracketedPasteMode: false,\n  cursorBlink: undefined,\n  cursorStyle: undefined,\n  origin: false,\n  reverseWraparound: false,\n  sendFocus: false,\n  wraparound: true // defaults: xterm - true, vt100 - false\n});\n\nexport class CoreService extends Disposable implements ICoreService {\n  public serviceBrand: any;\n\n  public isCursorInitialized: boolean = false;\n  public isCursorHidden: boolean = false;\n  public modes: IModes;\n  public decPrivateModes: IDecPrivateModes;\n\n  private readonly _onData = this._register(new Emitter<string>());\n  public readonly onData = this._onData.event;\n  private readonly _onUserInput = this._register(new Emitter<void>());\n  public readonly onUserInput = this._onUserInput.event;\n  private readonly _onBinary = this._register(new Emitter<string>());\n  public readonly onBinary = this._onBinary.event;\n  private readonly _onRequestScrollToBottom = this._register(new Emitter<void>());\n  public readonly onRequestScrollToBottom = this._onRequestScrollToBottom.event;\n\n  constructor(\n    @IBufferService private readonly _bufferService: IBufferService,\n    @ILogService private readonly _logService: ILogService,\n    @IOptionsService private readonly _optionsService: IOptionsService\n  ) {\n    super();\n    this.modes = clone(DEFAULT_MODES);\n    this.decPrivateModes = clone(DEFAULT_DEC_PRIVATE_MODES);\n  }\n\n  public reset(): void {\n    this.modes = clone(DEFAULT_MODES);\n    this.decPrivateModes = clone(DEFAULT_DEC_PRIVATE_MODES);\n  }\n\n  public triggerDataEvent(data: string, wasUserInput: boolean = false): void {\n    // Prevents all events to pty process if stdin is disabled\n    if (this._optionsService.rawOptions.disableStdin) {\n      return;\n    }\n\n    // Input is being sent to the terminal, the terminal should focus the prompt.\n    const buffer = this._bufferService.buffer;\n    if (wasUserInput && this._optionsService.rawOptions.scrollOnUserInput && buffer.ybase !== buffer.ydisp) {\n      this._onRequestScrollToBottom.fire();\n    }\n\n    // Fire onUserInput so listeners can react as well (eg. clear selection)\n    if (wasUserInput) {\n      this._onUserInput.fire();\n    }\n\n    // Fire onData API\n    this._logService.debug(`sending data \"${data}\"`, () => data.split('').map(e => e.charCodeAt(0)));\n    this._onData.fire(data);\n  }\n\n  public triggerBinaryEvent(data: string): void {\n    if (this._optionsService.rawOptions.disableStdin) {\n      return;\n    }\n    this._logService.debug(`sending binary \"${data}\"`, () => data.split('').map(e => e.charCodeAt(0)));\n    this._onBinary.fire(data);\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\nimport { IBufferService, ICoreService, ICoreMouseService } from 'common/services/Services';\nimport { ICoreMouseProtocol, ICoreMouseEvent, CoreMouseEncoding, CoreMouseEventType, CoreMouseButton, CoreMouseAction } from 'common/Types';\nimport { Disposable } from 'vs/base/common/lifecycle';\nimport { Emitter } from 'vs/base/common/event';\n\n/**\n * Supported default protocols.\n */\nconst DEFAULT_PROTOCOLS: { [key: string]: ICoreMouseProtocol } = {\n  /**\n   * NONE\n   * Events: none\n   * Modifiers: none\n   */\n  NONE: {\n    events: CoreMouseEventType.NONE,\n    restrict: () => false\n  },\n  /**\n   * X10\n   * Events: mousedown\n   * Modifiers: none\n   */\n  X10: {\n    events: CoreMouseEventType.DOWN,\n    restrict: (e: ICoreMouseEvent) => {\n      // no wheel, no move, no up\n      if (e.button === CoreMouseButton.WHEEL || e.action !== CoreMouseAction.DOWN) {\n        return false;\n      }\n      // no modifiers\n      e.ctrl = false;\n      e.alt = false;\n      e.shift = false;\n      return true;\n    }\n  },\n  /**\n   * VT200\n   * Events: mousedown / mouseup / wheel\n   * Modifiers: all\n   */\n  VT200: {\n    events: CoreMouseEventType.DOWN | CoreMouseEventType.UP | CoreMouseEventType.WHEEL,\n    restrict: (e: ICoreMouseEvent) => {\n      // no move\n      if (e.action === CoreMouseAction.MOVE) {\n        return false;\n      }\n      return true;\n    }\n  },\n  /**\n   * DRAG\n   * Events: mousedown / mouseup / wheel / mousedrag\n   * Modifiers: all\n   */\n  DRAG: {\n    events: CoreMouseEventType.DOWN | CoreMouseEventType.UP | CoreMouseEventType.WHEEL | CoreMouseEventType.DRAG,\n    restrict: (e: ICoreMouseEvent) => {\n      // no move without button\n      if (e.action === CoreMouseAction.MOVE && e.button === CoreMouseButton.NONE) {\n        return false;\n      }\n      return true;\n    }\n  },\n  /**\n   * ANY\n   * Events: all mouse related events\n   * Modifiers: all\n   */\n  ANY: {\n    events:\n      CoreMouseEventType.DOWN | CoreMouseEventType.UP | CoreMouseEventType.WHEEL\n      | CoreMouseEventType.DRAG | CoreMouseEventType.MOVE,\n    restrict: (e: ICoreMouseEvent) => true\n  }\n};\n\nconst enum Modifiers {\n  SHIFT = 4,\n  ALT = 8,\n  CTRL = 16\n}\n\n// helper for default encoders to generate the event code.\nfunction eventCode(e: ICoreMouseEvent, isSGR: boolean): number {\n  let code = (e.ctrl ? Modifiers.CTRL : 0) | (e.shift ? Modifiers.SHIFT : 0) | (e.alt ? Modifiers.ALT : 0);\n  if (e.button === CoreMouseButton.WHEEL) {\n    code |= 64;\n    code |= e.action;\n  } else {\n    code |= e.button & 3;\n    if (e.button & 4) {\n      code |= 64;\n    }\n    if (e.button & 8) {\n      code |= 128;\n    }\n    if (e.action === CoreMouseAction.MOVE) {\n      code |= CoreMouseAction.MOVE;\n    } else if (e.action === CoreMouseAction.UP && !isSGR) {\n      // special case - only SGR can report button on release\n      // all others have to go with NONE\n      code |= CoreMouseButton.NONE;\n    }\n  }\n  return code;\n}\n\nconst S = String.fromCharCode;\n\n/**\n * Supported default encodings.\n */\nconst DEFAULT_ENCODINGS: { [key: string]: CoreMouseEncoding } = {\n  /**\n   * DEFAULT - CSI M Pb Px Py\n   * Single byte encoding for coords and event code.\n   * Can encode values up to 223 (1-based).\n   */\n  DEFAULT: (e: ICoreMouseEvent) => {\n    const params = [eventCode(e, false) + 32, e.col + 32, e.row + 32];\n    // supress mouse report if we exceed addressible range\n    // Note this is handled differently by emulators\n    // - xterm:         sends 0;0 coords instead\n    // - vte, konsole:  no report\n    if (params[0] > 255 || params[1] > 255 || params[2] > 255) {\n      return '';\n    }\n    return `\\x1b[M${S(params[0])}${S(params[1])}${S(params[2])}`;\n  },\n  /**\n   * SGR - CSI < Pb ; Px ; Py M|m\n   * No encoding limitation.\n   * Can report button on release and works with a well formed sequence.\n   */\n  SGR: (e: ICoreMouseEvent) => {\n    const final = (e.action === CoreMouseAction.UP && e.button !== CoreMouseButton.WHEEL) ? 'm' : 'M';\n    return `\\x1b[<${eventCode(e, true)};${e.col};${e.row}${final}`;\n  },\n  SGR_PIXELS: (e: ICoreMouseEvent) => {\n    const final = (e.action === CoreMouseAction.UP && e.button !== CoreMouseButton.WHEEL) ? 'm' : 'M';\n    return `\\x1b[<${eventCode(e, true)};${e.x};${e.y}${final}`;\n  }\n};\n\n/**\n * CoreMouseService\n *\n * Provides mouse tracking reports with different protocols and encodings.\n *  - protocols: NONE (default), X10, VT200, DRAG, ANY\n *  - encodings: DEFAULT, SGR (UTF8, URXVT removed in #2507)\n *\n * Custom protocols/encodings can be added by `addProtocol` / `addEncoding`.\n * To activate a protocol/encoding, set `activeProtocol` / `activeEncoding`.\n * Switching a protocol will send a notification event `onProtocolChange`\n * with a list of needed events to track.\n *\n * The service handles the mouse tracking state and decides whether to send\n * a tracking report to the backend based on protocol and encoding limitations.\n * To send a mouse event call `triggerMouseEvent`.\n */\nexport class CoreMouseService extends Disposable implements ICoreMouseService {\n  public serviceBrand: any;\n\n  private _protocols: { [name: string]: ICoreMouseProtocol } = {};\n  private _encodings: { [name: string]: CoreMouseEncoding } = {};\n  private _activeProtocol: string = '';\n  private _activeEncoding: string = '';\n  private _lastEvent: ICoreMouseEvent | null = null;\n\n  private readonly _onProtocolChange = this._register(new Emitter<CoreMouseEventType>());\n  public readonly onProtocolChange =  this._onProtocolChange.event;\n\n  constructor(\n    @IBufferService private readonly _bufferService: IBufferService,\n    @ICoreService private readonly _coreService: ICoreService\n  ) {\n    super();\n    // register default protocols and encodings\n    for (const name of Object.keys(DEFAULT_PROTOCOLS)) this.addProtocol(name, DEFAULT_PROTOCOLS[name]);\n    for (const name of Object.keys(DEFAULT_ENCODINGS)) this.addEncoding(name, DEFAULT_ENCODINGS[name]);\n    // call reset to set defaults\n    this.reset();\n  }\n\n  public addProtocol(name: string, protocol: ICoreMouseProtocol): void {\n    this._protocols[name] = protocol;\n  }\n\n  public addEncoding(name: string, encoding: CoreMouseEncoding): void {\n    this._encodings[name] = encoding;\n  }\n\n  public get activeProtocol(): string {\n    return this._activeProtocol;\n  }\n\n  public get areMouseEventsActive(): boolean {\n    return this._protocols[this._activeProtocol].events !== 0;\n  }\n\n  public set activeProtocol(name: string) {\n    if (!this._protocols[name]) {\n      throw new Error(`unknown protocol \"${name}\"`);\n    }\n    this._activeProtocol = name;\n    this._onProtocolChange.fire(this._protocols[name].events);\n  }\n\n  public get activeEncoding(): string {\n    return this._activeEncoding;\n  }\n\n  public set activeEncoding(name: string) {\n    if (!this._encodings[name]) {\n      throw new Error(`unknown encoding \"${name}\"`);\n    }\n    this._activeEncoding = name;\n  }\n\n  public reset(): void {\n    this.activeProtocol = 'NONE';\n    this.activeEncoding = 'DEFAULT';\n    this._lastEvent = null;\n  }\n\n  /**\n   * Triggers a mouse event to be sent.\n   *\n   * Returns true if the event passed all protocol restrictions and a report\n   * was sent, otherwise false. The return value may be used to decide whether\n   * the default event action in the bowser component should be omitted.\n   *\n   * Note: The method will change values of the given event object\n   * to fullfill protocol and encoding restrictions.\n   */\n  public triggerMouseEvent(e: ICoreMouseEvent): boolean {\n    // range check for col/row\n    if (e.col < 0 || e.col >= this._bufferService.cols\n      || e.row < 0 || e.row >= this._bufferService.rows) {\n      return false;\n    }\n\n    // filter nonsense combinations of button + action\n    if (e.button === CoreMouseButton.WHEEL && e.action === CoreMouseAction.MOVE) {\n      return false;\n    }\n    if (e.button === CoreMouseButton.NONE && e.action !== CoreMouseAction.MOVE) {\n      return false;\n    }\n    if (e.button !== CoreMouseButton.WHEEL && (e.action === CoreMouseAction.LEFT || e.action === CoreMouseAction.RIGHT)) {\n      return false;\n    }\n\n    // report 1-based coords\n    e.col++;\n    e.row++;\n\n    // debounce move events at grid or pixel level\n    if (e.action === CoreMouseAction.MOVE\n      && this._lastEvent\n      && this._equalEvents(this._lastEvent, e, this._activeEncoding === 'SGR_PIXELS')\n    ) {\n      return false;\n    }\n\n    // apply protocol restrictions\n    if (!this._protocols[this._activeProtocol].restrict(e)) {\n      return false;\n    }\n\n    // encode report and send\n    const report = this._encodings[this._activeEncoding](e);\n    if (report) {\n      // always send DEFAULT as binary data\n      if (this._activeEncoding === 'DEFAULT') {\n        this._coreService.triggerBinaryEvent(report);\n      } else {\n        this._coreService.triggerDataEvent(report, true);\n      }\n    }\n\n    this._lastEvent = e;\n\n    return true;\n  }\n\n  public explainEvents(events: CoreMouseEventType): { [event: string]: boolean } {\n    return {\n      down: !!(events & CoreMouseEventType.DOWN),\n      up: !!(events & CoreMouseEventType.UP),\n      drag: !!(events & CoreMouseEventType.DRAG),\n      move: !!(events & CoreMouseEventType.MOVE),\n      wheel: !!(events & CoreMouseEventType.WHEEL)\n    };\n  }\n\n  private _equalEvents(e1: ICoreMouseEvent, e2: ICoreMouseEvent, pixels: boolean): boolean {\n    if (pixels) {\n      if (e1.x !== e2.x) return false;\n      if (e1.y !== e2.y) return false;\n    } else {\n      if (e1.col !== e2.col) return false;\n      if (e1.row !== e2.row) return false;\n    }\n    if (e1.button !== e2.button) return false;\n    if (e1.action !== e2.action) return false;\n    if (e1.ctrl !== e2.ctrl) return false;\n    if (e1.alt !== e2.alt) return false;\n    if (e1.shift !== e2.shift) return false;\n    return true;\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\nimport { IUnicodeVersionProvider, UnicodeCharProperties, UnicodeCharWidth } from 'common/services/Services';\nimport { UnicodeService } from 'common/services/UnicodeService';\n\nconst BMP_COMBINING = [\n  [0x0300, 0x036F], [0x0483, 0x0486], [0x0488, 0x0489],\n  [0x0591, 0x05BD], [0x05BF, 0x05BF], [0x05C1, 0x05C2],\n  [0x05C4, 0x05C5], [0x05C7, 0x05C7], [0x0600, 0x0603],\n  [0x0610, 0x0615], [0x064B, 0x065E], [0x0670, 0x0670],\n  [0x06D6, 0x06E4], [0x06E7, 0x06E8], [0x06EA, 0x06ED],\n  [0x070F, 0x070F], [0x0711, 0x0711], [0x0730, 0x074A],\n  [0x07A6, 0x07B0], [0x07EB, 0x07F3], [0x0901, 0x0902],\n  [0x093C, 0x093C], [0x0941, 0x0948], [0x094D, 0x094D],\n  [0x0951, 0x0954], [0x0962, 0x0963], [0x0981, 0x0981],\n  [0x09BC, 0x09BC], [0x09C1, 0x09C4], [0x09CD, 0x09CD],\n  [0x09E2, 0x09E3], [0x0A01, 0x0A02], [0x0A3C, 0x0A3C],\n  [0x0A41, 0x0A42], [0x0A47, 0x0A48], [0x0A4B, 0x0A4D],\n  [0x0A70, 0x0A71], [0x0A81, 0x0A82], [0x0ABC, 0x0ABC],\n  [0x0AC1, 0x0AC5], [0x0AC7, 0x0AC8], [0x0ACD, 0x0ACD],\n  [0x0AE2, 0x0AE3], [0x0B01, 0x0B01], [0x0B3C, 0x0B3C],\n  [0x0B3F, 0x0B3F], [0x0B41, 0x0B43], [0x0B4D, 0x0B4D],\n  [0x0B56, 0x0B56], [0x0B82, 0x0B82], [0x0BC0, 0x0BC0],\n  [0x0BCD, 0x0BCD], [0x0C3E, 0x0C40], [0x0C46, 0x0C48],\n  [0x0C4A, 0x0C4D], [0x0C55, 0x0C56], [0x0CBC, 0x0CBC],\n  [0x0CBF, 0x0CBF], [0x0CC6, 0x0CC6], [0x0CCC, 0x0CCD],\n  [0x0CE2, 0x0CE3], [0x0D41, 0x0D43], [0x0D4D, 0x0D4D],\n  [0x0DCA, 0x0DCA], [0x0DD2, 0x0DD4], [0x0DD6, 0x0DD6],\n  [0x0E31, 0x0E31], [0x0E34, 0x0E3A], [0x0E47, 0x0E4E],\n  [0x0EB1, 0x0EB1], [0x0EB4, 0x0EB9], [0x0EBB, 0x0EBC],\n  [0x0EC8, 0x0ECD], [0x0F18, 0x0F19], [0x0F35, 0x0F35],\n  [0x0F37, 0x0F37], [0x0F39, 0x0F39], [0x0F71, 0x0F7E],\n  [0x0F80, 0x0F84], [0x0F86, 0x0F87], [0x0F90, 0x0F97],\n  [0x0F99, 0x0FBC], [0x0FC6, 0x0FC6], [0x102D, 0x1030],\n  [0x1032, 0x1032], [0x1036, 0x1037], [0x1039, 0x1039],\n  [0x1058, 0x1059], [0x1160, 0x11FF], [0x135F, 0x135F],\n  [0x1712, 0x1714], [0x1732, 0x1734], [0x1752, 0x1753],\n  [0x1772, 0x1773], [0x17B4, 0x17B5], [0x17B7, 0x17BD],\n  [0x17C6, 0x17C6], [0x17C9, 0x17D3], [0x17DD, 0x17DD],\n  [0x180B, 0x180D], [0x18A9, 0x18A9], [0x1920, 0x1922],\n  [0x1927, 0x1928], [0x1932, 0x1932], [0x1939, 0x193B],\n  [0x1A17, 0x1A18], [0x1B00, 0x1B03], [0x1B34, 0x1B34],\n  [0x1B36, 0x1B3A], [0x1B3C, 0x1B3C], [0x1B42, 0x1B42],\n  [0x1B6B, 0x1B73], [0x1DC0, 0x1DCA], [0x1DFE, 0x1DFF],\n  [0x200B, 0x200F], [0x202A, 0x202E], [0x2060, 0x2063],\n  [0x206A, 0x206F], [0x20D0, 0x20EF], [0x302A, 0x302F],\n  [0x3099, 0x309A], [0xA806, 0xA806], [0xA80B, 0xA80B],\n  [0xA825, 0xA826], [0xFB1E, 0xFB1E], [0xFE00, 0xFE0F],\n  [0xFE20, 0xFE23], [0xFEFF, 0xFEFF], [0xFFF9, 0xFFFB]\n];\nconst HIGH_COMBINING = [\n  [0x10A01, 0x10A03], [0x10A05, 0x10A06], [0x10A0C, 0x10A0F],\n  [0x10A38, 0x10A3A], [0x10A3F, 0x10A3F], [0x1D167, 0x1D169],\n  [0x1D173, 0x1D182], [0x1D185, 0x1D18B], [0x1D1AA, 0x1D1AD],\n  [0x1D242, 0x1D244], [0xE0001, 0xE0001], [0xE0020, 0xE007F],\n  [0xE0100, 0xE01EF]\n];\n\n// BMP lookup table, lazy initialized during first addon loading\nlet table: Uint8Array;\n\nfunction bisearch(ucs: number, data: number[][]): boolean {\n  let min = 0;\n  let max = data.length - 1;\n  let mid;\n  if (ucs < data[0][0] || ucs > data[max][1]) {\n    return false;\n  }\n  while (max >= min) {\n    mid = (min + max) >> 1;\n    if (ucs > data[mid][1]) {\n      min = mid + 1;\n    } else if (ucs < data[mid][0]) {\n      max = mid - 1;\n    } else {\n      return true;\n    }\n  }\n  return false;\n}\n\nexport class UnicodeV6 implements IUnicodeVersionProvider {\n  public readonly version = '6';\n\n  constructor() {\n    // init lookup table once\n    if (!table) {\n      table = new Uint8Array(65536);\n      table.fill(1);\n      table[0] = 0;\n      // control chars\n      table.fill(0, 1, 32);\n      table.fill(0, 0x7f, 0xa0);\n\n      // apply wide char rules first\n      // wide chars\n      table.fill(2, 0x1100, 0x1160);\n      table[0x2329] = 2;\n      table[0x232a] = 2;\n      table.fill(2, 0x2e80, 0xa4d0);\n      table[0x303f] = 1;  // wrongly in last line\n\n      table.fill(2, 0xac00, 0xd7a4);\n      table.fill(2, 0xf900, 0xfb00);\n      table.fill(2, 0xfe10, 0xfe1a);\n      table.fill(2, 0xfe30, 0xfe70);\n      table.fill(2, 0xff00, 0xff61);\n      table.fill(2, 0xffe0, 0xffe7);\n\n      // apply combining last to ensure we overwrite\n      // wrongly wide set chars:\n      //    the original algo evals combining first and falls\n      //    through to wide check so we simply do here the opposite\n      // combining 0\n      for (let r = 0; r < BMP_COMBINING.length; ++r) {\n        table.fill(0, BMP_COMBINING[r][0], BMP_COMBINING[r][1] + 1);\n      }\n    }\n  }\n\n  public wcwidth(num: number): UnicodeCharWidth {\n    if (num < 32) return 0;\n    if (num < 127) return 1;\n    if (num < 65536) return table[num] as UnicodeCharWidth;\n    if (bisearch(num, HIGH_COMBINING)) return 0;\n    if ((num >= 0x20000 && num <= 0x2fffd) || (num >= 0x30000 && num <= 0x3fffd)) return 2;\n    return 1;\n  }\n\n  public charProperties(codepoint: number, preceding: UnicodeCharProperties): UnicodeCharProperties {\n    let width = this.wcwidth(codepoint);\n    let shouldJoin = width === 0 && preceding !== 0;\n    if (shouldJoin) {\n      const oldWidth = UnicodeService.extractWidth(preceding);\n      if (oldWidth === 0) {\n        shouldJoin = false;\n      } else if (oldWidth > width) {\n        width = oldWidth;\n      }\n    }\n    return UnicodeService.createPropertyValue(0, width, shouldJoin);\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { UnicodeV6 } from 'common/input/UnicodeV6';\nimport { IUnicodeService, IUnicodeVersionProvider, UnicodeCharProperties, UnicodeCharWidth } from 'common/services/Services';\nimport { Emitter } from 'vs/base/common/event';\n\nexport class UnicodeService implements IUnicodeService {\n  public serviceBrand: any;\n\n  private _providers: {[key: string]: IUnicodeVersionProvider} = Object.create(null);\n  private _active: string = '';\n  private _activeProvider: IUnicodeVersionProvider;\n\n  private readonly _onChange = new Emitter<string>();\n  public readonly onChange = this._onChange.event;\n\n  public static extractShouldJoin(value: UnicodeCharProperties): boolean {\n    return (value & 1) !== 0;\n  }\n  public static extractWidth(value: UnicodeCharProperties): UnicodeCharWidth {\n    return ((value >> 1) & 0x3) as UnicodeCharWidth;\n  }\n  public static extractCharKind(value: UnicodeCharProperties): number {\n    return value >> 3;\n  }\n  public static createPropertyValue(state: number, width: number, shouldJoin: boolean = false): UnicodeCharProperties {\n    return ((state & 0xffffff) << 3) | ((width & 3) << 1) | (shouldJoin?1:0);\n  }\n\n  constructor() {\n    const defaultProvider = new UnicodeV6();\n    this.register(defaultProvider);\n    this._active = defaultProvider.version;\n    this._activeProvider = defaultProvider;\n  }\n\n  public dispose(): void {\n    this._onChange.dispose();\n  }\n\n  public get versions(): string[] {\n    return Object.keys(this._providers);\n  }\n\n  public get activeVersion(): string {\n    return this._active;\n  }\n\n  public set activeVersion(version: string) {\n    if (!this._providers[version]) {\n      throw new Error(`unknown Unicode version \"${version}\"`);\n    }\n    this._active = version;\n    this._activeProvider = this._providers[version];\n    this._onChange.fire(version);\n  }\n\n  public register(provider: IUnicodeVersionProvider): void {\n    this._providers[provider.version] = provider;\n  }\n\n  /**\n   * Unicode version dependent interface.\n   */\n  public wcwidth(num: number): UnicodeCharWidth {\n    return this._activeProvider.wcwidth(num);\n  }\n\n  public getStringCellWidth(s: string): number {\n    let result = 0;\n    let precedingInfo = 0;\n    const length = s.length;\n    for (let i = 0; i < length; ++i) {\n      let code = s.charCodeAt(i);\n      // surrogate pair first\n      if (0xD800 <= code && code <= 0xDBFF) {\n        if (++i >= length) {\n          // this should not happen with strings retrieved from\n          // Buffer.translateToString as it converts from UTF-32\n          // and therefore always should contain the second part\n          // for any other string we still have to handle it somehow:\n          // simply treat the lonely surrogate first as a single char (UCS-2 behavior)\n          return result + this.wcwidth(code);\n        }\n        const second = s.charCodeAt(i);\n        // convert surrogate pair to high codepoint only for valid second part (UTF-16)\n        // otherwise treat them independently (UCS-2 behavior)\n        if (0xDC00 <= second && second <= 0xDFFF) {\n          code = (code - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;\n        } else {\n          result += this.wcwidth(second);\n        }\n      }\n      const currentInfo = this.charProperties(code, precedingInfo);\n      let chWidth = UnicodeService.extractWidth(currentInfo);\n      if (UnicodeService.extractShouldJoin(currentInfo)) {\n        chWidth -= UnicodeService.extractWidth(precedingInfo);\n      }\n      result += chWidth;\n      precedingInfo = currentInfo;\n    }\n    return result;\n  }\n\n  public charProperties(codepoint: number, preceding: UnicodeCharProperties): UnicodeCharProperties {\n    return this._activeProvider.charProperties(codepoint, preceding);\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { ICharsetService } from 'common/services/Services';\nimport { ICharset } from 'common/Types';\n\nexport class CharsetService implements ICharsetService {\n  public serviceBrand: any;\n\n  public charset: ICharset | undefined;\n  public glevel: number = 0;\n\n  private _charsets: (ICharset | undefined)[] = [];\n\n  public reset(): void {\n    this.charset = undefined;\n    this._charsets = [];\n    this.glevel = 0;\n  }\n\n  public setgLevel(g: number): void {\n    this.glevel = g;\n    this.charset = this._charsets[g];\n  }\n\n  public setgCharset(g: number, charset: ICharset | undefined): void {\n    this._charsets[g] = charset;\n    if (this.glevel === g) {\n      this.charset = charset;\n    }\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { CHAR_DATA_CODE_INDEX, NULL_CELL_CODE, WHITESPACE_CELL_CODE } from 'common/buffer/Constants';\nimport { IBufferService } from 'common/services/Services';\n\nexport function updateWindowsModeWrappedState(bufferService: IBufferService): void {\n  // Winpty does not support wraparound mode which means that lines will never\n  // be marked as wrapped. This causes issues for things like copying a line\n  // retaining the wrapped new line characters or if consumers are listening\n  // in on the data stream.\n  //\n  // The workaround for this is to listen to every incoming line feed and mark\n  // the line as wrapped if the last character in the previous line is not a\n  // space. This is certainly not without its problems, but generally on\n  // Windows when text reaches the end of the terminal it's likely going to be\n  // wrapped.\n  const line = bufferService.buffer.lines.get(bufferService.buffer.ybase + bufferService.buffer.y - 1);\n  const lastChar = line?.get(bufferService.cols - 1);\n\n  const nextLine = bufferService.buffer.lines.get(bufferService.buffer.ybase + bufferService.buffer.y);\n  if (nextLine && lastChar) {\n    nextLine.isWrapped = (lastChar[CHAR_DATA_CODE_INDEX] !== NULL_CELL_CODE && lastChar[CHAR_DATA_CODE_INDEX] !== WHITESPACE_CELL_CODE);\n  }\n}\n", "/**\n * Copyright (c) 2017 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\n/**\n * C0 control codes\n * See = https://en.wikipedia.org/wiki/C0_and_C1_control_codes\n */\nexport namespace C0 {\n  /** Null (Caret = ^@, C = \\0) */\n  export const NUL = '\\x00';\n  /** Start of Heading (Caret = ^A) */\n  export const SOH = '\\x01';\n  /** Start of Text (Caret = ^B) */\n  export const STX = '\\x02';\n  /** End of Text (Caret = ^C) */\n  export const ETX = '\\x03';\n  /** End of Transmission (Caret = ^D) */\n  export const EOT = '\\x04';\n  /** Enquiry (Caret = ^E) */\n  export const ENQ = '\\x05';\n  /** Acknowledge (Caret = ^F) */\n  export const ACK = '\\x06';\n  /** Bell (Caret = ^G, C = \\a) */\n  export const BEL = '\\x07';\n  /** Backspace (Caret = ^H, C = \\b) */\n  export const BS  = '\\x08';\n  /** Character Tabulation, Horizontal Tabulation (Caret = ^I, C = \\t) */\n  export const HT  = '\\x09';\n  /** Line Feed (Caret = ^J, C = \\n) */\n  export const LF  = '\\x0a';\n  /** Line Tabulation, Vertical Tabulation (Caret = ^K, C = \\v) */\n  export const VT  = '\\x0b';\n  /** Form Feed (Caret = ^L, C = \\f) */\n  export const FF  = '\\x0c';\n  /** Carriage Return (Caret = ^M, C = \\r) */\n  export const CR  = '\\x0d';\n  /** Shift Out (Caret = ^N) */\n  export const SO  = '\\x0e';\n  /** Shift In (Caret = ^O) */\n  export const SI  = '\\x0f';\n  /** Data Link Escape (Caret = ^P) */\n  export const DLE = '\\x10';\n  /** Device Control One (XON) (Caret = ^Q) */\n  export const DC1 = '\\x11';\n  /** Device Control Two (Caret = ^R) */\n  export const DC2 = '\\x12';\n  /** Device Control Three (XOFF) (Caret = ^S) */\n  export const DC3 = '\\x13';\n  /** Device Control Four (Caret = ^T) */\n  export const DC4 = '\\x14';\n  /** Negative Acknowledge (Caret = ^U) */\n  export const NAK = '\\x15';\n  /** Synchronous Idle (Caret = ^V) */\n  export const SYN = '\\x16';\n  /** End of Transmission Block (Caret = ^W) */\n  export const ETB = '\\x17';\n  /** Cancel (Caret = ^X) */\n  export const CAN = '\\x18';\n  /** End of Medium (Caret = ^Y) */\n  export const EM  = '\\x19';\n  /** Substitute (Caret = ^Z) */\n  export const SUB = '\\x1a';\n  /** Escape (Caret = ^[, C = \\e) */\n  export const ESC = '\\x1b';\n  /** File Separator (Caret = ^\\) */\n  export const FS  = '\\x1c';\n  /** Group Separator (Caret = ^]) */\n  export const GS  = '\\x1d';\n  /** Record Separator (Caret = ^^) */\n  export const RS  = '\\x1e';\n  /** Unit Separator (Caret = ^_) */\n  export const US  = '\\x1f';\n  /** Space */\n  export const SP  = '\\x20';\n  /** Delete (Caret = ^?) */\n  export const DEL = '\\x7f';\n}\n\n/**\n * C1 control codes\n * See = https://en.wikipedia.org/wiki/C0_and_C1_control_codes\n */\nexport namespace C1 {\n  /** padding character */\n  export const PAD = '\\x80';\n  /** High Octet Preset */\n  export const HOP = '\\x81';\n  /** Break Permitted Here */\n  export const BPH = '\\x82';\n  /** No Break Here */\n  export const NBH = '\\x83';\n  /** Index */\n  export const IND = '\\x84';\n  /** Next Line */\n  export const NEL = '\\x85';\n  /** Start of Selected Area */\n  export const SSA = '\\x86';\n  /** End of Selected Area */\n  export const ESA = '\\x87';\n  /** Horizontal Tabulation Set */\n  export const HTS = '\\x88';\n  /** Horizontal Tabulation With Justification */\n  export const HTJ = '\\x89';\n  /** Vertical Tabulation Set */\n  export const VTS = '\\x8a';\n  /** Partial Line Down */\n  export const PLD = '\\x8b';\n  /** Partial Line Up */\n  export const PLU = '\\x8c';\n  /** Reverse Index */\n  export const RI = '\\x8d';\n  /** Single-Shift 2 */\n  export const SS2 = '\\x8e';\n  /** Single-Shift 3 */\n  export const SS3 = '\\x8f';\n  /** Device Control String */\n  export const DCS = '\\x90';\n  /** Private Use 1 */\n  export const PU1 = '\\x91';\n  /** Private Use 2 */\n  export const PU2 = '\\x92';\n  /** Set Transmit State */\n  export const STS = '\\x93';\n  /** Destructive backspace, intended to eliminate ambiguity about meaning of BS. */\n  export const CCH = '\\x94';\n  /** Message Waiting */\n  export const MW = '\\x95';\n  /** Start of Protected Area */\n  export const SPA = '\\x96';\n  /** End of Protected Area */\n  export const EPA = '\\x97';\n  /** Start of String */\n  export const SOS = '\\x98';\n  /** Single Graphic Character Introducer */\n  export const SGCI = '\\x99';\n  /** Single Character Introducer */\n  export const SCI = '\\x9a';\n  /** Control Sequence Introducer */\n  export const CSI = '\\x9b';\n  /** String Terminator */\n  export const ST = '\\x9c';\n  /** Operating System Command */\n  export const OSC = '\\x9d';\n  /** Privacy Message */\n  export const PM = '\\x9e';\n  /** Application Program Command */\n  export const APC = '\\x9f';\n}\nexport namespace C1_ESCAPED {\n  export const ST = `${C0.ESC}\\\\`;\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\nimport { IParams, ParamsArray } from 'common/parser/Types';\n\n// max value supported for a single param/subparam (clamped to positive int32 range)\nconst MAX_VALUE = 0x7FFFFFFF;\n// max allowed subparams for a single sequence (hardcoded limitation)\nconst MAX_SUBPARAMS = 256;\n\n/**\n * Params storage class.\n * This type is used by the parser to accumulate sequence parameters and sub parameters\n * and transmit them to the input handler actions.\n *\n * NOTES:\n *  - params object for action handlers is borrowed, use `.toArray` or `.clone` to get a copy\n *  - never read beyond `params.length - 1` (likely to contain arbitrary data)\n *  - `.getSubParams` returns a borrowed typed array, use `.getSubParamsAll` for cloned sub params\n *  - hardcoded limitations:\n *    - max. value for a single (sub) param is 2^31 - 1 (greater values are clamped to that)\n *    - max. 256 sub params possible\n *    - negative values are not allowed beside -1 (placeholder for default value)\n *\n * About ZDM (Zero Default Mode):\n * ZDM is not orchestrated by this class. If the parser is in ZDM,\n * it should add 0 for empty params, otherwise -1. This does not apply\n * to subparams, empty subparams should always be added with -1.\n */\nexport class Params implements IParams {\n  // params store and length\n  public params: Int32Array;\n  public length: number;\n\n  // sub params store and length\n  protected _subParams: Int32Array;\n  protected _subParamsLength: number;\n\n  // sub params offsets from param: param idx --> [start, end] offset\n  private _subParamsIdx: Uint16Array;\n  private _rejectDigits: boolean;\n  private _rejectSubDigits: boolean;\n  private _digitIsSub: boolean;\n\n  /**\n   * Create a `Params` type from JS array representation.\n   */\n  public static fromArray(values: ParamsArray): Params {\n    const params = new Params();\n    if (!values.length) {\n      return params;\n    }\n    // skip leading sub params\n    for (let i = (Array.isArray(values[0])) ? 1 : 0; i < values.length; ++i) {\n      const value = values[i];\n      if (Array.isArray(value)) {\n        for (let k = 0; k < value.length; ++k) {\n          params.addSubParam(value[k]);\n        }\n      } else {\n        params.addParam(value);\n      }\n    }\n    return params;\n  }\n\n  /**\n   * @param maxLength max length of storable parameters\n   * @param maxSubParamsLength max length of storable sub parameters\n   */\n  constructor(public maxLength: number = 32, public maxSubParamsLength: number = 32) {\n    if (maxSubParamsLength > MAX_SUBPARAMS) {\n      throw new Error('maxSubParamsLength must not be greater than 256');\n    }\n    this.params = new Int32Array(maxLength);\n    this.length = 0;\n    this._subParams = new Int32Array(maxSubParamsLength);\n    this._subParamsLength = 0;\n    this._subParamsIdx = new Uint16Array(maxLength);\n    this._rejectDigits = false;\n    this._rejectSubDigits = false;\n    this._digitIsSub = false;\n  }\n\n  /**\n   * Clone object.\n   */\n  public clone(): Params {\n    const newParams = new Params(this.maxLength, this.maxSubParamsLength);\n    newParams.params.set(this.params);\n    newParams.length = this.length;\n    newParams._subParams.set(this._subParams);\n    newParams._subParamsLength = this._subParamsLength;\n    newParams._subParamsIdx.set(this._subParamsIdx);\n    newParams._rejectDigits = this._rejectDigits;\n    newParams._rejectSubDigits = this._rejectSubDigits;\n    newParams._digitIsSub = this._digitIsSub;\n    return newParams;\n  }\n\n  /**\n   * Get a JS array representation of the current parameters and sub parameters.\n   * The array is structured as follows:\n   *    sequence: \"1;2:3:4;5::6\"\n   *    array   : [1, 2, [3, 4], 5, [-1, 6]]\n   */\n  public toArray(): ParamsArray {\n    const res: ParamsArray = [];\n    for (let i = 0; i < this.length; ++i) {\n      res.push(this.params[i]);\n      const start = this._subParamsIdx[i] >> 8;\n      const end = this._subParamsIdx[i] & 0xFF;\n      if (end - start > 0) {\n        res.push(Array.prototype.slice.call(this._subParams, start, end));\n      }\n    }\n    return res;\n  }\n\n  /**\n   * Reset to initial empty state.\n   */\n  public reset(): void {\n    this.length = 0;\n    this._subParamsLength = 0;\n    this._rejectDigits = false;\n    this._rejectSubDigits = false;\n    this._digitIsSub = false;\n  }\n\n  /**\n   * Add a parameter value.\n   * `Params` only stores up to `maxLength` parameters, any later\n   * parameter will be ignored.\n   * Note: VT devices only stored up to 16 values, xterm seems to\n   * store up to 30.\n   */\n  public addParam(value: number): void {\n    this._digitIsSub = false;\n    if (this.length >= this.maxLength) {\n      this._rejectDigits = true;\n      return;\n    }\n    if (value < -1) {\n      throw new Error('values lesser than -1 are not allowed');\n    }\n    this._subParamsIdx[this.length] = this._subParamsLength << 8 | this._subParamsLength;\n    this.params[this.length++] = value > MAX_VALUE ? MAX_VALUE : value;\n  }\n\n  /**\n   * Add a sub parameter value.\n   * The sub parameter is automatically associated with the last parameter value.\n   * Thus it is not possible to add a subparameter without any parameter added yet.\n   * `Params` only stores up to `subParamsLength` sub parameters, any later\n   * sub parameter will be ignored.\n   */\n  public addSubParam(value: number): void {\n    this._digitIsSub = true;\n    if (!this.length) {\n      return;\n    }\n    if (this._rejectDigits || this._subParamsLength >= this.maxSubParamsLength) {\n      this._rejectSubDigits = true;\n      return;\n    }\n    if (value < -1) {\n      throw new Error('values lesser than -1 are not allowed');\n    }\n    this._subParams[this._subParamsLength++] = value > MAX_VALUE ? MAX_VALUE : value;\n    this._subParamsIdx[this.length - 1]++;\n  }\n\n  /**\n   * Whether parameter at index `idx` has sub parameters.\n   */\n  public hasSubParams(idx: number): boolean {\n    return ((this._subParamsIdx[idx] & 0xFF) - (this._subParamsIdx[idx] >> 8) > 0);\n  }\n\n  /**\n   * Return sub parameters for parameter at index `idx`.\n   * Note: The values are borrowed, thus you need to copy\n   * the values if you need to hold them in nonlocal scope.\n   */\n  public getSubParams(idx: number): Int32Array | null {\n    const start = this._subParamsIdx[idx] >> 8;\n    const end = this._subParamsIdx[idx] & 0xFF;\n    if (end - start > 0) {\n      return this._subParams.subarray(start, end);\n    }\n    return null;\n  }\n\n  /**\n   * Return all sub parameters as {idx: subparams} mapping.\n   * Note: The values are not borrowed.\n   */\n  public getSubParamsAll(): {[idx: number]: Int32Array} {\n    const result: {[idx: number]: Int32Array} = {};\n    for (let i = 0; i < this.length; ++i) {\n      const start = this._subParamsIdx[i] >> 8;\n      const end = this._subParamsIdx[i] & 0xFF;\n      if (end - start > 0) {\n        result[i] = this._subParams.slice(start, end);\n      }\n    }\n    return result;\n  }\n\n  /**\n   * Add a single digit value to current parameter.\n   * This is used by the parser to account digits on a char by char basis.\n   */\n  public addDigit(value: number): void {\n    let length;\n    if (this._rejectDigits\n      || !(length = this._digitIsSub ? this._subParamsLength : this.length)\n      || (this._digitIsSub && this._rejectSubDigits)\n    ) {\n      return;\n    }\n\n    const store = this._digitIsSub ? this._subParams : this.params;\n    const cur = store[length - 1];\n    store[length - 1] = ~cur ? Math.min(cur * 10 + value, MAX_VALUE) : value;\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { IOscHandler, IHandlerCollection, OscFallbackHandlerType, IOscParser, ISubParserStackState } from 'common/parser/Types';\nimport { OscState, PAYLOAD_LIMIT } from 'common/parser/Constants';\nimport { utf32ToString } from 'common/input/TextDecoder';\nimport { IDisposable } from 'common/Types';\n\nconst EMPTY_HANDLERS: IOscHandler[] = [];\n\nexport class OscParser implements IOscParser {\n  private _state = OscState.START;\n  private _active = EMPTY_HANDLERS;\n  private _id = -1;\n  private _handlers: IHandlerCollection<IOscHandler> = Object.create(null);\n  private _handlerFb: OscFallbackHandlerType = () => { };\n  private _stack: ISubParserStackState = {\n    paused: false,\n    loopPosition: 0,\n    fallThrough: false\n  };\n\n  public registerHandler(ident: number, handler: IOscHandler): IDisposable {\n    if (this._handlers[ident] === undefined) {\n      this._handlers[ident] = [];\n    }\n    const handlerList = this._handlers[ident];\n    handlerList.push(handler);\n    return {\n      dispose: () => {\n        const handlerIndex = handlerList.indexOf(handler);\n        if (handlerIndex !== -1) {\n          handlerList.splice(handlerIndex, 1);\n        }\n      }\n    };\n  }\n  public clearHandler(ident: number): void {\n    if (this._handlers[ident]) delete this._handlers[ident];\n  }\n  public setHandlerFallback(handler: OscFallbackHandlerType): void {\n    this._handlerFb = handler;\n  }\n\n  public dispose(): void {\n    this._handlers = Object.create(null);\n    this._handlerFb = () => { };\n    this._active = EMPTY_HANDLERS;\n  }\n\n  public reset(): void {\n    // force cleanup handlers if payload was already sent\n    if (this._state === OscState.PAYLOAD) {\n      for (let j = this._stack.paused ? this._stack.loopPosition - 1 : this._active.length - 1; j >= 0; --j) {\n        this._active[j].end(false);\n      }\n    }\n    this._stack.paused = false;\n    this._active = EMPTY_HANDLERS;\n    this._id = -1;\n    this._state = OscState.START;\n  }\n\n  private _start(): void {\n    this._active = this._handlers[this._id] || EMPTY_HANDLERS;\n    if (!this._active.length) {\n      this._handlerFb(this._id, 'START');\n    } else {\n      for (let j = this._active.length - 1; j >= 0; j--) {\n        this._active[j].start();\n      }\n    }\n  }\n\n  private _put(data: Uint32Array, start: number, end: number): void {\n    if (!this._active.length) {\n      this._handlerFb(this._id, 'PUT', utf32ToString(data, start, end));\n    } else {\n      for (let j = this._active.length - 1; j >= 0; j--) {\n        this._active[j].put(data, start, end);\n      }\n    }\n  }\n\n  public start(): void {\n    // always reset leftover handlers\n    this.reset();\n    this._state = OscState.ID;\n  }\n\n  /**\n   * Put data to current OSC command.\n   * Expects the identifier of the OSC command in the form\n   * OSC id ; payload ST/BEL\n   * Payload chunks are not further processed and get\n   * directly passed to the handlers.\n   */\n  public put(data: Uint32Array, start: number, end: number): void {\n    if (this._state === OscState.ABORT) {\n      return;\n    }\n    if (this._state === OscState.ID) {\n      while (start < end) {\n        const code = data[start++];\n        if (code === 0x3b) {\n          this._state = OscState.PAYLOAD;\n          this._start();\n          break;\n        }\n        if (code < 0x30 || 0x39 < code) {\n          this._state = OscState.ABORT;\n          return;\n        }\n        if (this._id === -1) {\n          this._id = 0;\n        }\n        this._id = this._id * 10 + code - 48;\n      }\n    }\n    if (this._state === OscState.PAYLOAD && end - start > 0) {\n      this._put(data, start, end);\n    }\n  }\n\n  /**\n   * Indicates end of an OSC command.\n   * Whether the OSC got aborted or finished normally\n   * is indicated by `success`.\n   */\n  public end(success: boolean, promiseResult: boolean = true): void | Promise<boolean> {\n    if (this._state === OscState.START) {\n      return;\n    }\n    // do nothing if command was faulty\n    if (this._state !== OscState.ABORT) {\n      // if we are still in ID state and get an early end\n      // means that the command has no payload thus we still have\n      // to announce START and send END right after\n      if (this._state === OscState.ID) {\n        this._start();\n      }\n\n      if (!this._active.length) {\n        this._handlerFb(this._id, 'END', success);\n      } else {\n        let handlerResult: boolean | Promise<boolean> = false;\n        let j = this._active.length - 1;\n        let fallThrough = false;\n        if (this._stack.paused) {\n          j = this._stack.loopPosition - 1;\n          handlerResult = promiseResult;\n          fallThrough = this._stack.fallThrough;\n          this._stack.paused = false;\n        }\n        if (!fallThrough && handlerResult === false) {\n          for (; j >= 0; j--) {\n            handlerResult = this._active[j].end(success);\n            if (handlerResult === true) {\n              break;\n            } else if (handlerResult instanceof Promise) {\n              this._stack.paused = true;\n              this._stack.loopPosition = j;\n              this._stack.fallThrough = false;\n              return handlerResult;\n            }\n          }\n          j--;\n        }\n        // cleanup left over handlers\n        // we always have to call .end for proper cleanup,\n        // here we use `success` to indicate whether a handler should execute\n        for (; j >= 0; j--) {\n          handlerResult = this._active[j].end(false);\n          if (handlerResult instanceof Promise) {\n            this._stack.paused = true;\n            this._stack.loopPosition = j;\n            this._stack.fallThrough = true;\n            return handlerResult;\n          }\n        }\n      }\n\n    }\n    this._active = EMPTY_HANDLERS;\n    this._id = -1;\n    this._state = OscState.START;\n  }\n}\n\n/**\n * Convenient class to allow attaching string based handler functions\n * as OSC handlers.\n */\nexport class OscHandler implements IOscHandler {\n  private _data = '';\n  private _hitLimit: boolean = false;\n\n  constructor(private _handler: (data: string) => boolean | Promise<boolean>) { }\n\n  public start(): void {\n    this._data = '';\n    this._hitLimit = false;\n  }\n\n  public put(data: Uint32Array, start: number, end: number): void {\n    if (this._hitLimit) {\n      return;\n    }\n    this._data += utf32ToString(data, start, end);\n    if (this._data.length > PAYLOAD_LIMIT) {\n      this._data = '';\n      this._hitLimit = true;\n    }\n  }\n\n  public end(success: boolean): boolean | Promise<boolean> {\n    let ret: boolean | Promise<boolean> = false;\n    if (this._hitLimit) {\n      ret = false;\n    } else if (success) {\n      ret = this._handler(this._data);\n      if (ret instanceof Promise) {\n        // need to hold data until `ret` got resolved\n        // dont care for errors, data will be freed anyway on next start\n        return ret.then(res => {\n          this._data = '';\n          this._hitLimit = false;\n          return res;\n        });\n      }\n    }\n    this._data = '';\n    this._hitLimit = false;\n    return ret;\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { IDisposable } from 'common/Types';\nimport { IDcsHandler, IParams, IHandlerCollection, IDcsParser, DcsFallbackHandlerType, ISubParserStackState } from 'common/parser/Types';\nimport { utf32ToString } from 'common/input/TextDecoder';\nimport { Params } from 'common/parser/Params';\nimport { PAYLOAD_LIMIT } from 'common/parser/Constants';\n\nconst EMPTY_HANDLERS: IDcsHandler[] = [];\n\nexport class DcsParser implements IDcsParser {\n  private _handlers: IHandlerCollection<IDcsHandler> = Object.create(null);\n  private _active: IDcsHandler[] = EMPTY_HANDLERS;\n  private _ident: number = 0;\n  private _handlerFb: DcsFallbackHandlerType = () => { };\n  private _stack: ISubParserStackState = {\n    paused: false,\n    loopPosition: 0,\n    fallThrough: false\n  };\n\n  public dispose(): void {\n    this._handlers = Object.create(null);\n    this._handlerFb = () => { };\n    this._active = EMPTY_HANDLERS;\n  }\n\n  public registerHandler(ident: number, handler: IDcsHandler): IDisposable {\n    if (this._handlers[ident] === undefined) {\n      this._handlers[ident] = [];\n    }\n    const handlerList = this._handlers[ident];\n    handlerList.push(handler);\n    return {\n      dispose: () => {\n        const handlerIndex = handlerList.indexOf(handler);\n        if (handlerIndex !== -1) {\n          handlerList.splice(handlerIndex, 1);\n        }\n      }\n    };\n  }\n\n  public clearHandler(ident: number): void {\n    if (this._handlers[ident]) delete this._handlers[ident];\n  }\n\n  public setHandlerFallback(handler: DcsFallbackHandlerType): void {\n    this._handlerFb = handler;\n  }\n\n  public reset(): void {\n    // force cleanup leftover handlers\n    if (this._active.length) {\n      for (let j = this._stack.paused ? this._stack.loopPosition - 1 : this._active.length - 1; j >= 0; --j) {\n        this._active[j].unhook(false);\n      }\n    }\n    this._stack.paused = false;\n    this._active = EMPTY_HANDLERS;\n    this._ident = 0;\n  }\n\n  public hook(ident: number, params: IParams): void {\n    // always reset leftover handlers\n    this.reset();\n    this._ident = ident;\n    this._active = this._handlers[ident] || EMPTY_HANDLERS;\n    if (!this._active.length) {\n      this._handlerFb(this._ident, 'HOOK', params);\n    } else {\n      for (let j = this._active.length - 1; j >= 0; j--) {\n        this._active[j].hook(params);\n      }\n    }\n  }\n\n  public put(data: Uint32Array, start: number, end: number): void {\n    if (!this._active.length) {\n      this._handlerFb(this._ident, 'PUT', utf32ToString(data, start, end));\n    } else {\n      for (let j = this._active.length - 1; j >= 0; j--) {\n        this._active[j].put(data, start, end);\n      }\n    }\n  }\n\n  public unhook(success: boolean, promiseResult: boolean = true): void | Promise<boolean> {\n    if (!this._active.length) {\n      this._handlerFb(this._ident, 'UNHOOK', success);\n    } else {\n      let handlerResult: boolean | Promise<boolean> = false;\n      let j = this._active.length - 1;\n      let fallThrough = false;\n      if (this._stack.paused) {\n        j = this._stack.loopPosition - 1;\n        handlerResult = promiseResult;\n        fallThrough = this._stack.fallThrough;\n        this._stack.paused = false;\n      }\n      if (!fallThrough && handlerResult === false) {\n        for (; j >= 0; j--) {\n          handlerResult = this._active[j].unhook(success);\n          if (handlerResult === true) {\n            break;\n          } else if (handlerResult instanceof Promise) {\n            this._stack.paused = true;\n            this._stack.loopPosition = j;\n            this._stack.fallThrough = false;\n            return handlerResult;\n          }\n        }\n        j--;\n      }\n      // cleanup left over handlers (fallThrough for async)\n      for (; j >= 0; j--) {\n        handlerResult = this._active[j].unhook(false);\n        if (handlerResult instanceof Promise) {\n          this._stack.paused = true;\n          this._stack.loopPosition = j;\n          this._stack.fallThrough = true;\n          return handlerResult;\n        }\n      }\n    }\n    this._active = EMPTY_HANDLERS;\n    this._ident = 0;\n  }\n}\n\n// predefine empty params as [0] (ZDM)\nconst EMPTY_PARAMS = new Params();\nEMPTY_PARAMS.addParam(0);\n\n/**\n * Convenient class to create a DCS handler from a single callback function.\n * Note: The payload is currently limited to 50 MB (hardcoded).\n */\nexport class DcsHandler implements IDcsHandler {\n  private _data = '';\n  private _params: IParams = EMPTY_PARAMS;\n  private _hitLimit: boolean = false;\n\n  constructor(private _handler: (data: string, params: IParams) => boolean | Promise<boolean>) { }\n\n  public hook(params: IParams): void {\n    // since we need to preserve params until `unhook`, we have to clone it\n    // (only borrowed from parser and spans multiple parser states)\n    // perf optimization:\n    // clone only, if we have non empty params, otherwise stick with default\n    this._params = (params.length > 1 || params.params[0]) ? params.clone() : EMPTY_PARAMS;\n    this._data = '';\n    this._hitLimit = false;\n  }\n\n  public put(data: Uint32Array, start: number, end: number): void {\n    if (this._hitLimit) {\n      return;\n    }\n    this._data += utf32ToString(data, start, end);\n    if (this._data.length > PAYLOAD_LIMIT) {\n      this._data = '';\n      this._hitLimit = true;\n    }\n  }\n\n  public unhook(success: boolean): boolean | Promise<boolean> {\n    let ret: boolean | Promise<boolean> = false;\n    if (this._hitLimit) {\n      ret = false;\n    } else if (success) {\n      ret = this._handler(this._data, this._params);\n      if (ret instanceof Promise) {\n        // need to hold data and params until `ret` got resolved\n        // dont care for errors, data will be freed anyway on next start\n        return ret.then(res => {\n          this._params = EMPTY_PARAMS;\n          this._data = '';\n          this._hitLimit = false;\n          return res;\n        });\n      }\n    }\n    this._params = EMPTY_PARAMS;\n    this._data = '';\n    this._hitLimit = false;\n    return ret;\n  }\n}\n", "/**\n * Copyright (c) 2018 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { IParsingState, IDcsHandler, IEscapeSequenceParser, IParams, IOscHandler, IHandlerCollection, CsiHandlerType, OscFallbackHandlerType, IOscParser, EscHandlerType, IDcsParser, DcsFallbackHandlerType, IFunctionIdentifier, ExecuteFallbackHandlerType, CsiFallbackHandlerType, EscFallbackHandlerType, PrintHandlerType, PrintFallbackHandlerType, ExecuteHandlerType, IParserStackState, ParserStackType, ResumableHandlersType } from 'common/parser/Types';\nimport { ParserState, ParserAction } from 'common/parser/Constants';\nimport { Disposable, toDisposable } from 'vs/base/common/lifecycle';\nimport { IDisposable } from 'common/Types';\nimport { Params } from 'common/parser/Params';\nimport { OscParser } from 'common/parser/OscParser';\nimport { DcsParser } from 'common/parser/DcsParser';\n\n/**\n * Table values are generated like this:\n *    index:  currentState << TableValue.INDEX_STATE_SHIFT | charCode\n *    value:  action << TableValue.TRANSITION_ACTION_SHIFT | nextState\n */\nconst enum TableAccess {\n  TRANSITION_ACTION_SHIFT = 4,\n  TRANSITION_STATE_MASK = 15,\n  INDEX_STATE_SHIFT = 8\n}\n\n/**\n * Transition table for EscapeSequenceParser.\n */\nexport class TransitionTable {\n  public table: Uint8Array;\n\n  constructor(length: number) {\n    this.table = new Uint8Array(length);\n  }\n\n  /**\n   * Set default transition.\n   * @param action default action\n   * @param next default next state\n   */\n  public setDefault(action: ParserAction, next: ParserState): void {\n    this.table.fill(action << TableAccess.TRANSITION_ACTION_SHIFT | next);\n  }\n\n  /**\n   * Add a transition to the transition table.\n   * @param code input character code\n   * @param state current parser state\n   * @param action parser action to be done\n   * @param next next parser state\n   */\n  public add(code: number, state: ParserState, action: ParserAction, next: ParserState): void {\n    this.table[state << TableAccess.INDEX_STATE_SHIFT | code] = action << TableAccess.TRANSITION_ACTION_SHIFT | next;\n  }\n\n  /**\n   * Add transitions for multiple input character codes.\n   * @param codes input character code array\n   * @param state current parser state\n   * @param action parser action to be done\n   * @param next next parser state\n   */\n  public addMany(codes: number[], state: ParserState, action: ParserAction, next: ParserState): void {\n    for (let i = 0; i < codes.length; i++) {\n      this.table[state << TableAccess.INDEX_STATE_SHIFT | codes[i]] = action << TableAccess.TRANSITION_ACTION_SHIFT | next;\n    }\n  }\n}\n\n\n// Pseudo-character placeholder for printable non-ascii characters (unicode).\nconst NON_ASCII_PRINTABLE = 0xA0;\n\n\n/**\n * VT500 compatible transition table.\n * Taken from https://vt100.net/emu/dec_ansi_parser.\n */\nexport const VT500_TRANSITION_TABLE = (function (): TransitionTable {\n  const table: TransitionTable = new TransitionTable(4095);\n\n  // range macro for byte\n  const BYTE_VALUES = 256;\n  const blueprint = Array.apply(null, Array(BYTE_VALUES)).map((unused: any, i: number) => i);\n  const r = (start: number, end: number): number[] => blueprint.slice(start, end);\n\n  // Default definitions.\n  const PRINTABLES = r(0x20, 0x7f); // 0x20 (SP) included, 0x7F (DEL) excluded\n  const EXECUTABLES = r(0x00, 0x18);\n  EXECUTABLES.push(0x19);\n  EXECUTABLES.push.apply(EXECUTABLES, r(0x1c, 0x20));\n\n  const states: number[] = r(ParserState.GROUND, ParserState.DCS_PASSTHROUGH + 1);\n  let state: any;\n\n  // set default transition\n  table.setDefault(ParserAction.ERROR, ParserState.GROUND);\n  // printables\n  table.addMany(PRINTABLES, ParserState.GROUND, ParserAction.PRINT, ParserState.GROUND);\n  // global anywhere rules\n  for (state in states) {\n    table.addMany([0x18, 0x1a, 0x99, 0x9a], state, ParserAction.EXECUTE, ParserState.GROUND);\n    table.addMany(r(0x80, 0x90), state, ParserAction.EXECUTE, ParserState.GROUND);\n    table.addMany(r(0x90, 0x98), state, ParserAction.EXECUTE, ParserState.GROUND);\n    table.add(0x9c, state, ParserAction.IGNORE, ParserState.GROUND); // ST as terminator\n    table.add(0x1b, state, ParserAction.CLEAR, ParserState.ESCAPE);  // ESC\n    table.add(0x9d, state, ParserAction.OSC_START, ParserState.OSC_STRING);  // OSC\n    table.addMany([0x98, 0x9e, 0x9f], state, ParserAction.IGNORE, ParserState.SOS_PM_APC_STRING);\n    table.add(0x9b, state, ParserAction.CLEAR, ParserState.CSI_ENTRY);  // CSI\n    table.add(0x90, state, ParserAction.CLEAR, ParserState.DCS_ENTRY);  // DCS\n  }\n  // rules for executables and 7f\n  table.addMany(EXECUTABLES, ParserState.GROUND, ParserAction.EXECUTE, ParserState.GROUND);\n  table.addMany(EXECUTABLES, ParserState.ESCAPE, ParserAction.EXECUTE, ParserState.ESCAPE);\n  table.add(0x7f, ParserState.ESCAPE, ParserAction.IGNORE, ParserState.ESCAPE);\n  table.addMany(EXECUTABLES, ParserState.OSC_STRING, ParserAction.IGNORE, ParserState.OSC_STRING);\n  table.addMany(EXECUTABLES, ParserState.CSI_ENTRY, ParserAction.EXECUTE, ParserState.CSI_ENTRY);\n  table.add(0x7f, ParserState.CSI_ENTRY, ParserAction.IGNORE, ParserState.CSI_ENTRY);\n  table.addMany(EXECUTABLES, ParserState.CSI_PARAM, ParserAction.EXECUTE, ParserState.CSI_PARAM);\n  table.add(0x7f, ParserState.CSI_PARAM, ParserAction.IGNORE, ParserState.CSI_PARAM);\n  table.addMany(EXECUTABLES, ParserState.CSI_IGNORE, ParserAction.EXECUTE, ParserState.CSI_IGNORE);\n  table.addMany(EXECUTABLES, ParserState.CSI_INTERMEDIATE, ParserAction.EXECUTE, ParserState.CSI_INTERMEDIATE);\n  table.add(0x7f, ParserState.CSI_INTERMEDIATE, ParserAction.IGNORE, ParserState.CSI_INTERMEDIATE);\n  table.addMany(EXECUTABLES, ParserState.ESCAPE_INTERMEDIATE, ParserAction.EXECUTE, ParserState.ESCAPE_INTERMEDIATE);\n  table.add(0x7f, ParserState.ESCAPE_INTERMEDIATE, ParserAction.IGNORE, ParserState.ESCAPE_INTERMEDIATE);\n  // osc\n  table.add(0x5d, ParserState.ESCAPE, ParserAction.OSC_START, ParserState.OSC_STRING);\n  table.addMany(PRINTABLES, ParserState.OSC_STRING, ParserAction.OSC_PUT, ParserState.OSC_STRING);\n  table.add(0x7f, ParserState.OSC_STRING, ParserAction.OSC_PUT, ParserState.OSC_STRING);\n  table.addMany([0x9c, 0x1b, 0x18, 0x1a, 0x07], ParserState.OSC_STRING, ParserAction.OSC_END, ParserState.GROUND);\n  table.addMany(r(0x1c, 0x20), ParserState.OSC_STRING, ParserAction.IGNORE, ParserState.OSC_STRING);\n  // sos/pm/apc does nothing\n  table.addMany([0x58, 0x5e, 0x5f], ParserState.ESCAPE, ParserAction.IGNORE, ParserState.SOS_PM_APC_STRING);\n  table.addMany(PRINTABLES, ParserState.SOS_PM_APC_STRING, ParserAction.IGNORE, ParserState.SOS_PM_APC_STRING);\n  table.addMany(EXECUTABLES, ParserState.SOS_PM_APC_STRING, ParserAction.IGNORE, ParserState.SOS_PM_APC_STRING);\n  table.add(0x9c, ParserState.SOS_PM_APC_STRING, ParserAction.IGNORE, ParserState.GROUND);\n  table.add(0x7f, ParserState.SOS_PM_APC_STRING, ParserAction.IGNORE, ParserState.SOS_PM_APC_STRING);\n  // csi entries\n  table.add(0x5b, ParserState.ESCAPE, ParserAction.CLEAR, ParserState.CSI_ENTRY);\n  table.addMany(r(0x40, 0x7f), ParserState.CSI_ENTRY, ParserAction.CSI_DISPATCH, ParserState.GROUND);\n  table.addMany(r(0x30, 0x3c), ParserState.CSI_ENTRY, ParserAction.PARAM, ParserState.CSI_PARAM);\n  table.addMany([0x3c, 0x3d, 0x3e, 0x3f], ParserState.CSI_ENTRY, ParserAction.COLLECT, ParserState.CSI_PARAM);\n  table.addMany(r(0x30, 0x3c), ParserState.CSI_PARAM, ParserAction.PARAM, ParserState.CSI_PARAM);\n  table.addMany(r(0x40, 0x7f), ParserState.CSI_PARAM, ParserAction.CSI_DISPATCH, ParserState.GROUND);\n  table.addMany([0x3c, 0x3d, 0x3e, 0x3f], ParserState.CSI_PARAM, ParserAction.IGNORE, ParserState.CSI_IGNORE);\n  table.addMany(r(0x20, 0x40), ParserState.CSI_IGNORE, ParserAction.IGNORE, ParserState.CSI_IGNORE);\n  table.add(0x7f, ParserState.CSI_IGNORE, ParserAction.IGNORE, ParserState.CSI_IGNORE);\n  table.addMany(r(0x40, 0x7f), ParserState.CSI_IGNORE, ParserAction.IGNORE, ParserState.GROUND);\n  table.addMany(r(0x20, 0x30), ParserState.CSI_ENTRY, ParserAction.COLLECT, ParserState.CSI_INTERMEDIATE);\n  table.addMany(r(0x20, 0x30), ParserState.CSI_INTERMEDIATE, ParserAction.COLLECT, ParserState.CSI_INTERMEDIATE);\n  table.addMany(r(0x30, 0x40), ParserState.CSI_INTERMEDIATE, ParserAction.IGNORE, ParserState.CSI_IGNORE);\n  table.addMany(r(0x40, 0x7f), ParserState.CSI_INTERMEDIATE, ParserAction.CSI_DISPATCH, ParserState.GROUND);\n  table.addMany(r(0x20, 0x30), ParserState.CSI_PARAM, ParserAction.COLLECT, ParserState.CSI_INTERMEDIATE);\n  // esc_intermediate\n  table.addMany(r(0x20, 0x30), ParserState.ESCAPE, ParserAction.COLLECT, ParserState.ESCAPE_INTERMEDIATE);\n  table.addMany(r(0x20, 0x30), ParserState.ESCAPE_INTERMEDIATE, ParserAction.COLLECT, ParserState.ESCAPE_INTERMEDIATE);\n  table.addMany(r(0x30, 0x7f), ParserState.ESCAPE_INTERMEDIATE, ParserAction.ESC_DISPATCH, ParserState.GROUND);\n  table.addMany(r(0x30, 0x50), ParserState.ESCAPE, ParserAction.ESC_DISPATCH, ParserState.GROUND);\n  table.addMany(r(0x51, 0x58), ParserState.ESCAPE, ParserAction.ESC_DISPATCH, ParserState.GROUND);\n  table.addMany([0x59, 0x5a, 0x5c], ParserState.ESCAPE, ParserAction.ESC_DISPATCH, ParserState.GROUND);\n  table.addMany(r(0x60, 0x7f), ParserState.ESCAPE, ParserAction.ESC_DISPATCH, ParserState.GROUND);\n  // dcs entry\n  table.add(0x50, ParserState.ESCAPE, ParserAction.CLEAR, ParserState.DCS_ENTRY);\n  table.addMany(EXECUTABLES, ParserState.DCS_ENTRY, ParserAction.IGNORE, ParserState.DCS_ENTRY);\n  table.add(0x7f, ParserState.DCS_ENTRY, ParserAction.IGNORE, ParserState.DCS_ENTRY);\n  table.addMany(r(0x1c, 0x20), ParserState.DCS_ENTRY, ParserAction.IGNORE, ParserState.DCS_ENTRY);\n  table.addMany(r(0x20, 0x30), ParserState.DCS_ENTRY, ParserAction.COLLECT, ParserState.DCS_INTERMEDIATE);\n  table.addMany(r(0x30, 0x3c), ParserState.DCS_ENTRY, ParserAction.PARAM, ParserState.DCS_PARAM);\n  table.addMany([0x3c, 0x3d, 0x3e, 0x3f], ParserState.DCS_ENTRY, ParserAction.COLLECT, ParserState.DCS_PARAM);\n  table.addMany(EXECUTABLES, ParserState.DCS_IGNORE, ParserAction.IGNORE, ParserState.DCS_IGNORE);\n  table.addMany(r(0x20, 0x80), ParserState.DCS_IGNORE, ParserAction.IGNORE, ParserState.DCS_IGNORE);\n  table.addMany(r(0x1c, 0x20), ParserState.DCS_IGNORE, ParserAction.IGNORE, ParserState.DCS_IGNORE);\n  table.addMany(EXECUTABLES, ParserState.DCS_PARAM, ParserAction.IGNORE, ParserState.DCS_PARAM);\n  table.add(0x7f, ParserState.DCS_PARAM, ParserAction.IGNORE, ParserState.DCS_PARAM);\n  table.addMany(r(0x1c, 0x20), ParserState.DCS_PARAM, ParserAction.IGNORE, ParserState.DCS_PARAM);\n  table.addMany(r(0x30, 0x3c), ParserState.DCS_PARAM, ParserAction.PARAM, ParserState.DCS_PARAM);\n  table.addMany([0x3c, 0x3d, 0x3e, 0x3f], ParserState.DCS_PARAM, ParserAction.IGNORE, ParserState.DCS_IGNORE);\n  table.addMany(r(0x20, 0x30), ParserState.DCS_PARAM, ParserAction.COLLECT, ParserState.DCS_INTERMEDIATE);\n  table.addMany(EXECUTABLES, ParserState.DCS_INTERMEDIATE, ParserAction.IGNORE, ParserState.DCS_INTERMEDIATE);\n  table.add(0x7f, ParserState.DCS_INTERMEDIATE, ParserAction.IGNORE, ParserState.DCS_INTERMEDIATE);\n  table.addMany(r(0x1c, 0x20), ParserState.DCS_INTERMEDIATE, ParserAction.IGNORE, ParserState.DCS_INTERMEDIATE);\n  table.addMany(r(0x20, 0x30), ParserState.DCS_INTERMEDIATE, ParserAction.COLLECT, ParserState.DCS_INTERMEDIATE);\n  table.addMany(r(0x30, 0x40), ParserState.DCS_INTERMEDIATE, ParserAction.IGNORE, ParserState.DCS_IGNORE);\n  table.addMany(r(0x40, 0x7f), ParserState.DCS_INTERMEDIATE, ParserAction.DCS_HOOK, ParserState.DCS_PASSTHROUGH);\n  table.addMany(r(0x40, 0x7f), ParserState.DCS_PARAM, ParserAction.DCS_HOOK, ParserState.DCS_PASSTHROUGH);\n  table.addMany(r(0x40, 0x7f), ParserState.DCS_ENTRY, ParserAction.DCS_HOOK, ParserState.DCS_PASSTHROUGH);\n  table.addMany(EXECUTABLES, ParserState.DCS_PASSTHROUGH, ParserAction.DCS_PUT, ParserState.DCS_PASSTHROUGH);\n  table.addMany(PRINTABLES, ParserState.DCS_PASSTHROUGH, ParserAction.DCS_PUT, ParserState.DCS_PASSTHROUGH);\n  table.add(0x7f, ParserState.DCS_PASSTHROUGH, ParserAction.IGNORE, ParserState.DCS_PASSTHROUGH);\n  table.addMany([0x1b, 0x9c, 0x18, 0x1a], ParserState.DCS_PASSTHROUGH, ParserAction.DCS_UNHOOK, ParserState.GROUND);\n  // special handling of unicode chars\n  table.add(NON_ASCII_PRINTABLE, ParserState.GROUND, ParserAction.PRINT, ParserState.GROUND);\n  table.add(NON_ASCII_PRINTABLE, ParserState.OSC_STRING, ParserAction.OSC_PUT, ParserState.OSC_STRING);\n  table.add(NON_ASCII_PRINTABLE, ParserState.CSI_IGNORE, ParserAction.IGNORE, ParserState.CSI_IGNORE);\n  table.add(NON_ASCII_PRINTABLE, ParserState.DCS_IGNORE, ParserAction.IGNORE, ParserState.DCS_IGNORE);\n  table.add(NON_ASCII_PRINTABLE, ParserState.DCS_PASSTHROUGH, ParserAction.DCS_PUT, ParserState.DCS_PASSTHROUGH);\n  return table;\n})();\n\n\n/**\n * EscapeSequenceParser.\n * This class implements the ANSI/DEC compatible parser described by\n * Paul Williams (https://vt100.net/emu/dec_ansi_parser).\n *\n * To implement custom ANSI compliant escape sequences it is not needed to\n * alter this parser, instead consider registering a custom handler.\n * For non ANSI compliant sequences change the transition table with\n * the optional `transitions` constructor argument and\n * reimplement the `parse` method.\n *\n * This parser is currently hardcoded to operate in ZDM (Zero Default Mode)\n * as suggested by the original parser, thus empty parameters are set to 0.\n * This this is not in line with the latest ECMA-48 specification\n * (ZDM was part of the early specs and got completely removed later on).\n *\n * Other than the original parser from vt100.net this parser supports\n * sub parameters in digital parameters separated by colons. Empty sub parameters\n * are set to -1 (no ZDM for sub parameters).\n *\n * About prefix and intermediate bytes:\n * This parser follows the assumptions of the vt100.net parser with these restrictions:\n * - only one prefix byte is allowed as first parameter byte, byte range 0x3c .. 0x3f\n * - max. two intermediates are respected, byte range 0x20 .. 0x2f\n * Note that this is not in line with ECMA-48 which does not limit either of those.\n * Furthermore ECMA-48 allows the prefix byte range at any param byte position. Currently\n * there are no known sequences that follow the broader definition of the specification.\n *\n * TODO: implement error recovery hook via error handler return values\n */\nexport class EscapeSequenceParser extends Disposable implements IEscapeSequenceParser {\n  public initialState: number;\n  public currentState: number;\n  public precedingJoinState: number; // UnicodeJoinProperties\n\n  // buffers over several parse calls\n  protected _params: Params;\n  protected _collect: number;\n\n  // handler lookup containers\n  protected _printHandler: PrintHandlerType;\n  protected _executeHandlers: { [flag: number]: ExecuteHandlerType };\n  protected _csiHandlers: IHandlerCollection<CsiHandlerType>;\n  protected _escHandlers: IHandlerCollection<EscHandlerType>;\n  protected readonly _oscParser: IOscParser;\n  protected readonly _dcsParser: IDcsParser;\n  protected _errorHandler: (state: IParsingState) => IParsingState;\n\n  // fallback handlers\n  protected _printHandlerFb: PrintFallbackHandlerType;\n  protected _executeHandlerFb: ExecuteFallbackHandlerType;\n  protected _csiHandlerFb: CsiFallbackHandlerType;\n  protected _escHandlerFb: EscFallbackHandlerType;\n  protected _errorHandlerFb: (state: IParsingState) => IParsingState;\n\n  // parser stack save for async handler support\n  protected _parseStack: IParserStackState = {\n    state: ParserStackType.NONE,\n    handlers: [],\n    handlerPos: 0,\n    transition: 0,\n    chunkPos: 0\n  };\n\n  constructor(\n    protected readonly _transitions: TransitionTable = VT500_TRANSITION_TABLE\n  ) {\n    super();\n\n    this.initialState = ParserState.GROUND;\n    this.currentState = this.initialState;\n    this._params = new Params(); // defaults to 32 storable params/subparams\n    this._params.addParam(0);    // ZDM\n    this._collect = 0;\n    this.precedingJoinState = 0;\n\n    // set default fallback handlers and handler lookup containers\n    this._printHandlerFb = (data, start, end): void => { };\n    this._executeHandlerFb = (code: number): void => { };\n    this._csiHandlerFb = (ident: number, params: IParams): void => { };\n    this._escHandlerFb = (ident: number): void => { };\n    this._errorHandlerFb = (state: IParsingState): IParsingState => state;\n    this._printHandler = this._printHandlerFb;\n    this._executeHandlers = Object.create(null);\n    this._csiHandlers = Object.create(null);\n    this._escHandlers = Object.create(null);\n    this._register(toDisposable(() => {\n      this._csiHandlers = Object.create(null);\n      this._executeHandlers = Object.create(null);\n      this._escHandlers = Object.create(null);\n    }));\n    this._oscParser = this._register(new OscParser());\n    this._dcsParser = this._register(new DcsParser());\n    this._errorHandler = this._errorHandlerFb;\n\n    // swallow 7bit ST (ESC+\\)\n    this.registerEscHandler({ final: '\\\\' }, () => true);\n  }\n\n  protected _identifier(id: IFunctionIdentifier, finalRange: number[] = [0x40, 0x7e]): number {\n    let res = 0;\n    if (id.prefix) {\n      if (id.prefix.length > 1) {\n        throw new Error('only one byte as prefix supported');\n      }\n      res = id.prefix.charCodeAt(0);\n      if (res && 0x3c > res || res > 0x3f) {\n        throw new Error('prefix must be in range 0x3c .. 0x3f');\n      }\n    }\n    if (id.intermediates) {\n      if (id.intermediates.length > 2) {\n        throw new Error('only two bytes as intermediates are supported');\n      }\n      for (let i = 0; i < id.intermediates.length; ++i) {\n        const intermediate = id.intermediates.charCodeAt(i);\n        if (0x20 > intermediate || intermediate > 0x2f) {\n          throw new Error('intermediate must be in range 0x20 .. 0x2f');\n        }\n        res <<= 8;\n        res |= intermediate;\n      }\n    }\n    if (id.final.length !== 1) {\n      throw new Error('final must be a single byte');\n    }\n    const finalCode = id.final.charCodeAt(0);\n    if (finalRange[0] > finalCode || finalCode > finalRange[1]) {\n      throw new Error(`final must be in range ${finalRange[0]} .. ${finalRange[1]}`);\n    }\n    res <<= 8;\n    res |= finalCode;\n\n    return res;\n  }\n\n  public identToString(ident: number): string {\n    const res: string[] = [];\n    while (ident) {\n      res.push(String.fromCharCode(ident & 0xFF));\n      ident >>= 8;\n    }\n    return res.reverse().join('');\n  }\n\n  public setPrintHandler(handler: PrintHandlerType): void {\n    this._printHandler = handler;\n  }\n  public clearPrintHandler(): void {\n    this._printHandler = this._printHandlerFb;\n  }\n\n  public registerEscHandler(id: IFunctionIdentifier, handler: EscHandlerType): IDisposable {\n    const ident = this._identifier(id, [0x30, 0x7e]);\n    if (this._escHandlers[ident] === undefined) {\n      this._escHandlers[ident] = [];\n    }\n    const handlerList = this._escHandlers[ident];\n    handlerList.push(handler);\n    return {\n      dispose: () => {\n        const handlerIndex = handlerList.indexOf(handler);\n        if (handlerIndex !== -1) {\n          handlerList.splice(handlerIndex, 1);\n        }\n      }\n    };\n  }\n  public clearEscHandler(id: IFunctionIdentifier): void {\n    if (this._escHandlers[this._identifier(id, [0x30, 0x7e])]) delete this._escHandlers[this._identifier(id, [0x30, 0x7e])];\n  }\n  public setEscHandlerFallback(handler: EscFallbackHandlerType): void {\n    this._escHandlerFb = handler;\n  }\n\n  public setExecuteHandler(flag: string, handler: ExecuteHandlerType): void {\n    this._executeHandlers[flag.charCodeAt(0)] = handler;\n  }\n  public clearExecuteHandler(flag: string): void {\n    if (this._executeHandlers[flag.charCodeAt(0)]) delete this._executeHandlers[flag.charCodeAt(0)];\n  }\n  public setExecuteHandlerFallback(handler: ExecuteFallbackHandlerType): void {\n    this._executeHandlerFb = handler;\n  }\n\n  public registerCsiHandler(id: IFunctionIdentifier, handler: CsiHandlerType): IDisposable {\n    const ident = this._identifier(id);\n    if (this._csiHandlers[ident] === undefined) {\n      this._csiHandlers[ident] = [];\n    }\n    const handlerList = this._csiHandlers[ident];\n    handlerList.push(handler);\n    return {\n      dispose: () => {\n        const handlerIndex = handlerList.indexOf(handler);\n        if (handlerIndex !== -1) {\n          handlerList.splice(handlerIndex, 1);\n        }\n      }\n    };\n  }\n  public clearCsiHandler(id: IFunctionIdentifier): void {\n    if (this._csiHandlers[this._identifier(id)]) delete this._csiHandlers[this._identifier(id)];\n  }\n  public setCsiHandlerFallback(callback: (ident: number, params: IParams) => void): void {\n    this._csiHandlerFb = callback;\n  }\n\n  public registerDcsHandler(id: IFunctionIdentifier, handler: IDcsHandler): IDisposable {\n    return this._dcsParser.registerHandler(this._identifier(id), handler);\n  }\n  public clearDcsHandler(id: IFunctionIdentifier): void {\n    this._dcsParser.clearHandler(this._identifier(id));\n  }\n  public setDcsHandlerFallback(handler: DcsFallbackHandlerType): void {\n    this._dcsParser.setHandlerFallback(handler);\n  }\n\n  public registerOscHandler(ident: number, handler: IOscHandler): IDisposable {\n    return this._oscParser.registerHandler(ident, handler);\n  }\n  public clearOscHandler(ident: number): void {\n    this._oscParser.clearHandler(ident);\n  }\n  public setOscHandlerFallback(handler: OscFallbackHandlerType): void {\n    this._oscParser.setHandlerFallback(handler);\n  }\n\n  public setErrorHandler(callback: (state: IParsingState) => IParsingState): void {\n    this._errorHandler = callback;\n  }\n  public clearErrorHandler(): void {\n    this._errorHandler = this._errorHandlerFb;\n  }\n\n  /**\n   * Reset parser to initial values.\n   *\n   * This can also be used to lift the improper continuation error condition\n   * when dealing with async handlers. Use this only as a last resort to silence\n   * that error when the terminal has no pending data to be processed. Note that\n   * the interrupted async handler might continue its work in the future messing\n   * up the terminal state even further.\n   */\n  public reset(): void {\n    this.currentState = this.initialState;\n    this._oscParser.reset();\n    this._dcsParser.reset();\n    this._params.reset();\n    this._params.addParam(0); // ZDM\n    this._collect = 0;\n    this.precedingJoinState = 0;\n    // abort pending continuation from async handler\n    // Here the RESET type indicates, that the next parse call will\n    // ignore any saved stack, instead continues sync with next codepoint from GROUND\n    if (this._parseStack.state !== ParserStackType.NONE) {\n      this._parseStack.state = ParserStackType.RESET;\n      this._parseStack.handlers = []; // also release handlers ref\n    }\n  }\n\n  /**\n   * Async parse support.\n   */\n  protected _preserveStack(\n    state: ParserStackType,\n    handlers: ResumableHandlersType,\n    handlerPos: number,\n    transition: number,\n    chunkPos: number\n  ): void {\n    this._parseStack.state = state;\n    this._parseStack.handlers = handlers;\n    this._parseStack.handlerPos = handlerPos;\n    this._parseStack.transition = transition;\n    this._parseStack.chunkPos = chunkPos;\n  }\n\n  /**\n   * Parse UTF32 codepoints in `data` up to `length`.\n   *\n   * Note: For several actions with high data load the parsing is optimized\n   * by using local read ahead loops with hardcoded conditions to\n   * avoid costly table lookups. Make sure that any change of table values\n   * will be reflected in the loop conditions as well and vice versa.\n   * Affected states/actions:\n   * - GROUND:PRINT\n   * - CSI_PARAM:PARAM\n   * - DCS_PARAM:PARAM\n   * - OSC_STRING:OSC_PUT\n   * - DCS_PASSTHROUGH:DCS_PUT\n   *\n   * Note on asynchronous handler support:\n   * Any handler returning a promise will be treated as asynchronous.\n   * To keep the in-band blocking working for async handlers, `parse` pauses execution,\n   * creates a stack save and returns the promise to the caller.\n   * For proper continuation of the paused state it is important\n   * to await the promise resolving. On resolve the parse must be repeated\n   * with the same chunk of data and the resolved value in `promiseResult`\n   * until no promise is returned.\n   *\n   * Important: With only sync handlers defined, parsing is completely synchronous as well.\n   * As soon as an async handler is involved, synchronous parsing is not possible anymore.\n   *\n   * Boilerplate for proper parsing of multiple chunks with async handlers:\n   *\n   * ```typescript\n   * async function parseMultipleChunks(chunks: Uint32Array[]): Promise<void> {\n   *   for (const chunk of chunks) {\n   *     let result: void | Promise<boolean>;\n   *     let prev: boolean | undefined;\n   *     while (result = parser.parse(chunk, chunk.length, prev)) {\n   *       prev = await result;\n   *     }\n   *   }\n   *   // finished parsing all chunks...\n   * }\n   * ```\n   */\n  public parse(data: Uint32Array, length: number, promiseResult?: boolean): void | Promise<boolean> {\n    let code = 0;\n    let transition = 0;\n    let start = 0;\n    let handlerResult: void | boolean | Promise<boolean>;\n\n    // resume from async handler\n    if (this._parseStack.state) {\n      // allow sync parser reset even in continuation mode\n      // Note: can be used to recover parser from improper continuation error below\n      if (this._parseStack.state === ParserStackType.RESET) {\n        this._parseStack.state = ParserStackType.NONE;\n        start = this._parseStack.chunkPos + 1; // continue with next codepoint in GROUND\n      } else {\n        if (promiseResult === undefined || this._parseStack.state === ParserStackType.FAIL) {\n          /**\n           * Reject further parsing on improper continuation after pausing. This is a really bad\n           * condition with screwed up execution order and prolly messed up terminal state,\n           * therefore we exit hard with an exception and reject any further parsing.\n           *\n           * Note: With `Terminal.write` usage this exception should never occur, as the top level\n           * calls are guaranteed to handle async conditions properly. If you ever encounter this\n           * exception in your terminal integration it indicates, that you injected data chunks to\n           * `InputHandler.parse` or `EscapeSequenceParser.parse` synchronously without waiting for\n           * continuation of a running async handler.\n           *\n           * It is possible to get rid of this error by calling `reset`. But dont rely on that, as\n           * the pending async handler still might mess up the terminal later. Instead fix the\n           * faulty async handling, so this error will not be thrown anymore.\n           */\n          this._parseStack.state = ParserStackType.FAIL;\n          throw new Error('improper continuation due to previous async handler, giving up parsing');\n        }\n\n        // we have to resume the old handler loop if:\n        // - return value of the promise was `false`\n        // - handlers are not exhausted yet\n        const handlers = this._parseStack.handlers;\n        let handlerPos = this._parseStack.handlerPos - 1;\n        switch (this._parseStack.state) {\n          case ParserStackType.CSI:\n            if (promiseResult === false && handlerPos > -1) {\n              for (; handlerPos >= 0; handlerPos--) {\n                handlerResult = (handlers as CsiHandlerType[])[handlerPos](this._params);\n                if (handlerResult === true) {\n                  break;\n                } else if (handlerResult instanceof Promise) {\n                  this._parseStack.handlerPos = handlerPos;\n                  return handlerResult;\n                }\n              }\n            }\n            this._parseStack.handlers = [];\n            break;\n          case ParserStackType.ESC:\n            if (promiseResult === false && handlerPos > -1) {\n              for (; handlerPos >= 0; handlerPos--) {\n                handlerResult = (handlers as EscHandlerType[])[handlerPos]();\n                if (handlerResult === true) {\n                  break;\n                } else if (handlerResult instanceof Promise) {\n                  this._parseStack.handlerPos = handlerPos;\n                  return handlerResult;\n                }\n              }\n            }\n            this._parseStack.handlers = [];\n            break;\n          case ParserStackType.DCS:\n            code = data[this._parseStack.chunkPos];\n            handlerResult = this._dcsParser.unhook(code !== 0x18 && code !== 0x1a, promiseResult);\n            if (handlerResult) {\n              return handlerResult;\n            }\n            if (code === 0x1b) this._parseStack.transition |= ParserState.ESCAPE;\n            this._params.reset();\n            this._params.addParam(0); // ZDM\n            this._collect = 0;\n            break;\n          case ParserStackType.OSC:\n            code = data[this._parseStack.chunkPos];\n            handlerResult = this._oscParser.end(code !== 0x18 && code !== 0x1a, promiseResult);\n            if (handlerResult) {\n              return handlerResult;\n            }\n            if (code === 0x1b) this._parseStack.transition |= ParserState.ESCAPE;\n            this._params.reset();\n            this._params.addParam(0); // ZDM\n            this._collect = 0;\n            break;\n        }\n        // cleanup before continuing with the main sync loop\n        this._parseStack.state = ParserStackType.NONE;\n        start = this._parseStack.chunkPos + 1;\n        this.precedingJoinState = 0;\n        this.currentState = this._parseStack.transition & TableAccess.TRANSITION_STATE_MASK;\n      }\n    }\n\n    // continue with main sync loop\n\n    // process input string\n    for (let i = start; i < length; ++i) {\n      code = data[i];\n\n      // normal transition & action lookup\n      transition = this._transitions.table[this.currentState << TableAccess.INDEX_STATE_SHIFT | (code < 0xa0 ? code : NON_ASCII_PRINTABLE)];\n      switch (transition >> TableAccess.TRANSITION_ACTION_SHIFT) {\n        case ParserAction.PRINT:\n          // read ahead with loop unrolling\n          // Note: 0x20 (SP) is included, 0x7F (DEL) is excluded\n          for (let j = i + 1; ; ++j) {\n            if (j >= length || (code = data[j]) < 0x20 || (code > 0x7e && code < NON_ASCII_PRINTABLE)) {\n              this._printHandler(data, i, j);\n              i = j - 1;\n              break;\n            }\n            if (++j >= length || (code = data[j]) < 0x20 || (code > 0x7e && code < NON_ASCII_PRINTABLE)) {\n              this._printHandler(data, i, j);\n              i = j - 1;\n              break;\n            }\n            if (++j >= length || (code = data[j]) < 0x20 || (code > 0x7e && code < NON_ASCII_PRINTABLE)) {\n              this._printHandler(data, i, j);\n              i = j - 1;\n              break;\n            }\n            if (++j >= length || (code = data[j]) < 0x20 || (code > 0x7e && code < NON_ASCII_PRINTABLE)) {\n              this._printHandler(data, i, j);\n              i = j - 1;\n              break;\n            }\n          }\n          break;\n        case ParserAction.EXECUTE:\n          if (this._executeHandlers[code]) this._executeHandlers[code]();\n          else this._executeHandlerFb(code);\n          this.precedingJoinState = 0;\n          break;\n        case ParserAction.IGNORE:\n          break;\n        case ParserAction.ERROR:\n          const inject: IParsingState = this._errorHandler(\n            {\n              position: i,\n              code,\n              currentState: this.currentState,\n              collect: this._collect,\n              params: this._params,\n              abort: false\n            });\n          if (inject.abort) return;\n          // inject values: currently not implemented\n          break;\n        case ParserAction.CSI_DISPATCH:\n          // Trigger CSI Handler\n          const handlers = this._csiHandlers[this._collect << 8 | code];\n          let j = handlers ? handlers.length - 1 : -1;\n          for (; j >= 0; j--) {\n            // true means success and to stop bubbling\n            // a promise indicates an async handler that needs to finish before progressing\n            handlerResult = handlers[j](this._params);\n            if (handlerResult === true) {\n              break;\n            } else if (handlerResult instanceof Promise) {\n              this._preserveStack(ParserStackType.CSI, handlers, j, transition, i);\n              return handlerResult;\n            }\n          }\n          if (j < 0) {\n            this._csiHandlerFb(this._collect << 8 | code, this._params);\n          }\n          this.precedingJoinState = 0;\n          break;\n        case ParserAction.PARAM:\n          // inner loop: digits (0x30 - 0x39) and ; (0x3b) and : (0x3a)\n          do {\n            switch (code) {\n              case 0x3b:\n                this._params.addParam(0);  // ZDM\n                break;\n              case 0x3a:\n                this._params.addSubParam(-1);\n                break;\n              default:  // 0x30 - 0x39\n                this._params.addDigit(code - 48);\n            }\n          } while (++i < length && (code = data[i]) > 0x2f && code < 0x3c);\n          i--;\n          break;\n        case ParserAction.COLLECT:\n          this._collect <<= 8;\n          this._collect |= code;\n          break;\n        case ParserAction.ESC_DISPATCH:\n          const handlersEsc = this._escHandlers[this._collect << 8 | code];\n          let jj = handlersEsc ? handlersEsc.length - 1 : -1;\n          for (; jj >= 0; jj--) {\n            // true means success and to stop bubbling\n            // a promise indicates an async handler that needs to finish before progressing\n            handlerResult = handlersEsc[jj]();\n            if (handlerResult === true) {\n              break;\n            } else if (handlerResult instanceof Promise) {\n              this._preserveStack(ParserStackType.ESC, handlersEsc, jj, transition, i);\n              return handlerResult;\n            }\n          }\n          if (jj < 0) {\n            this._escHandlerFb(this._collect << 8 | code);\n          }\n          this.precedingJoinState = 0;\n          break;\n        case ParserAction.CLEAR:\n          this._params.reset();\n          this._params.addParam(0); // ZDM\n          this._collect = 0;\n          break;\n        case ParserAction.DCS_HOOK:\n          this._dcsParser.hook(this._collect << 8 | code, this._params);\n          break;\n        case ParserAction.DCS_PUT:\n          // inner loop - exit DCS_PUT: 0x18, 0x1a, 0x1b, 0x7f, 0x80 - 0x9f\n          // unhook triggered by: 0x1b, 0x9c (success) and 0x18, 0x1a (abort)\n          for (let j = i + 1; ; ++j) {\n            if (j >= length || (code = data[j]) === 0x18 || code === 0x1a || code === 0x1b || (code > 0x7f && code < NON_ASCII_PRINTABLE)) {\n              this._dcsParser.put(data, i, j);\n              i = j - 1;\n              break;\n            }\n          }\n          break;\n        case ParserAction.DCS_UNHOOK:\n          handlerResult = this._dcsParser.unhook(code !== 0x18 && code !== 0x1a);\n          if (handlerResult) {\n            this._preserveStack(ParserStackType.DCS, [], 0, transition, i);\n            return handlerResult;\n          }\n          if (code === 0x1b) transition |= ParserState.ESCAPE;\n          this._params.reset();\n          this._params.addParam(0); // ZDM\n          this._collect = 0;\n          this.precedingJoinState = 0;\n          break;\n        case ParserAction.OSC_START:\n          this._oscParser.start();\n          break;\n        case ParserAction.OSC_PUT:\n          // inner loop: 0x20 (SP) included, 0x7F (DEL) included\n          for (let j = i + 1; ; j++) {\n            if (j >= length || (code = data[j]) < 0x20 || (code > 0x7f && code < NON_ASCII_PRINTABLE)) {\n              this._oscParser.put(data, i, j);\n              i = j - 1;\n              break;\n            }\n          }\n          break;\n        case ParserAction.OSC_END:\n          handlerResult = this._oscParser.end(code !== 0x18 && code !== 0x1a);\n          if (handlerResult) {\n            this._preserveStack(ParserStackType.OSC, [], 0, transition, i);\n            return handlerResult;\n          }\n          if (code === 0x1b) transition |= ParserState.ESCAPE;\n          this._params.reset();\n          this._params.addParam(0); // ZDM\n          this._collect = 0;\n          this.precedingJoinState = 0;\n          break;\n      }\n      this.currentState = transition & TableAccess.TRANSITION_STATE_MASK;\n    }\n  }\n}\n", "/**\n * Copyright (c) 2021 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\n\n// 'rgb:' rule - matching: r/g/b | rr/gg/bb | rrr/ggg/bbb | rrrr/gggg/bbbb (hex digits)\nconst RGB_REX = /^([\\da-f])\\/([\\da-f])\\/([\\da-f])$|^([\\da-f]{2})\\/([\\da-f]{2})\\/([\\da-f]{2})$|^([\\da-f]{3})\\/([\\da-f]{3})\\/([\\da-f]{3})$|^([\\da-f]{4})\\/([\\da-f]{4})\\/([\\da-f]{4})$/;\n// '#...' rule - matching any hex digits\nconst HASH_REX = /^[\\da-f]+$/;\n\n/**\n * Parse color spec to RGB values (8 bit per channel).\n * See `man xparsecolor` for details about certain format specifications.\n *\n * Supported formats:\n * - rgb:<red>/<green>/<blue> with <red>, <green>, <blue> in h | hh | hhh | hhhh\n * - #RGB, #RRGGBB, #RRRGGGBBB, #RRRRGGGGBBBB\n *\n * All other formats like rgbi: or device-independent string specifications\n * with float numbering are not supported.\n */\nexport function parseColor(data: string): [number, number, number] | undefined {\n  if (!data) return;\n  // also handle uppercases\n  let low = data.toLowerCase();\n  if (low.indexOf('rgb:') === 0) {\n    // 'rgb:' specifier\n    low = low.slice(4);\n    const m = RGB_REX.exec(low);\n    if (m) {\n      const base = m[1] ? 15 : m[4] ? 255 : m[7] ? 4095 : 65535;\n      return [\n        Math.round(parseInt(m[1] || m[4] || m[7] || m[10], 16) / base * 255),\n        Math.round(parseInt(m[2] || m[5] || m[8] || m[11], 16) / base * 255),\n        Math.round(parseInt(m[3] || m[6] || m[9] || m[12], 16) / base * 255)\n      ];\n    }\n  } else if (low.indexOf('#') === 0) {\n    // '#' specifier\n    low = low.slice(1);\n    if (HASH_REX.exec(low) && [3, 6, 9, 12].includes(low.length)) {\n      const adv = low.length / 3;\n      const result: [number, number, number] = [0, 0, 0];\n      for (let i = 0; i < 3; ++i) {\n        const c = parseInt(low.slice(adv * i, adv * i + adv), 16);\n        result[i] = adv === 1 ? c << 4 : adv === 2 ? c : adv === 3 ? c >> 4 : c >> 8;\n      }\n      return result;\n    }\n  }\n\n  // Named colors are currently not supported due to the large addition to the xterm.js bundle size\n  // they would add. In order to support named colors, we would need some way of optionally loading\n  // additional payloads so startup/download time is not bloated (see #3530).\n}\n\n// pad hex output to requested bit width\nfunction pad(n: number, bits: number): string {\n  const s = n.toString(16);\n  const s2 = s.length < 2 ? '0' + s : s;\n  switch (bits) {\n    case 4:\n      return s[0];\n    case 8:\n      return s2;\n    case 12:\n      return (s2 + s2).slice(0, 3);\n    default:\n      return s2 + s2;\n  }\n}\n\n/**\n * Convert a given color to rgb:../../.. string of `bits` depth.\n */\nexport function toRgbString(color: [number, number, number], bits: number = 16): string {\n  const [r, g, b] = color;\n  return `rgb:${pad(r, bits)}/${pad(g, bits)}/${pad(b, bits)}`;\n}\n", "/**\n * Copyright (c) 2014 The xterm.js authors. All rights reserved.\n * Copyright (c) 2012-2013, Christopher Jeffrey (MIT License)\n * @license MIT\n */\n\nimport { IInputHandler, IAttributeData, IDisposable, IWindowOptions, IColorEvent, IParseStack, ColorIndex, ColorRequestType, SpecialColorIndex } from 'common/Types';\nimport { C0, C1 } from 'common/data/EscapeSequences';\nimport { CHARSETS, DEFAULT_CHARSET } from 'common/data/Charsets';\nimport { EscapeSequenceParser } from 'common/parser/EscapeSequenceParser';\nimport { Disposable } from 'vs/base/common/lifecycle';\nimport { StringToUtf32, stringFromCodePoint, Utf8ToUtf32 } from 'common/input/TextDecoder';\nimport { BufferLine, DEFAULT_ATTR_DATA } from 'common/buffer/BufferLine';\nimport { IParsingState, IEscapeSequenceParser, IParams, IFunctionIdentifier } from 'common/parser/Types';\nimport { NULL_CELL_CODE, NULL_CELL_WIDTH, Attributes, FgFlags, BgFlags, Content, UnderlineStyle } from 'common/buffer/Constants';\nimport { CellData } from 'common/buffer/CellData';\nimport { AttributeData } from 'common/buffer/AttributeData';\nimport { ICoreService, IBufferService, IOptionsService, ILogService, ICoreMouseService, ICharsetService, IUnicodeService, LogLevelEnum, IOscLinkService } from 'common/services/Services';\nimport { UnicodeService } from 'common/services/UnicodeService';\nimport { OscHandler } from 'common/parser/OscParser';\nimport { DcsHandler } from 'common/parser/DcsParser';\nimport { IBuffer } from 'common/buffer/Types';\nimport { parseColor } from 'common/input/XParseColor';\nimport { Emitter } from 'vs/base/common/event';\n\n/**\n * Map collect to glevel. Used in `selectCharset`.\n */\nconst GLEVEL: { [key: string]: number } = { '(': 0, ')': 1, '*': 2, '+': 3, '-': 1, '.': 2 };\n\n/**\n * VT commands done by the parser - FIXME: move this to the parser?\n */\n// @vt: #Y   ESC   CSI   \"Control Sequence Introducer\"   \"ESC [\"   \"Start of a CSI sequence.\"\n// @vt: #Y   ESC   OSC   \"Operating System Command\"      \"ESC ]\"   \"Start of an OSC sequence.\"\n// @vt: #Y   ESC   DCS   \"Device Control String\"         \"ESC P\"   \"Start of a DCS sequence.\"\n// @vt: #Y   ESC   ST    \"String Terminator\"             \"ESC \\\"   \"Terminator used for string type sequences.\"\n// @vt: #Y   ESC   PM    \"Privacy Message\"               \"ESC ^\"   \"Start of a privacy message.\"\n// @vt: #Y   ESC   APC   \"Application Program Command\"   \"ESC _\"   \"Start of an APC sequence.\"\n// @vt: #Y   C1    CSI   \"Control Sequence Introducer\"   \"\\x9B\"    \"Start of a CSI sequence.\"\n// @vt: #Y   C1    OSC   \"Operating System Command\"      \"\\x9D\"    \"Start of an OSC sequence.\"\n// @vt: #Y   C1    DCS   \"Device Control String\"         \"\\x90\"    \"Start of a DCS sequence.\"\n// @vt: #Y   C1    ST    \"String Terminator\"             \"\\x9C\"    \"Terminator used for string type sequences.\"\n// @vt: #Y   C1    PM    \"Privacy Message\"               \"\\x9E\"    \"Start of a privacy message.\"\n// @vt: #Y   C1    APC   \"Application Program Command\"   \"\\x9F\"    \"Start of an APC sequence.\"\n// @vt: #Y   C0    NUL   \"Null\"                          \"\\0, \\x00\"  \"NUL is ignored.\"\n// @vt: #Y   C0    ESC   \"Escape\"                        \"\\e, \\x1B\"  \"Start of a sequence. Cancels any other sequence.\"\n\n/**\n * Document xterm VT features here that are currently unsupported\n */\n// @vt: #E[Supported via @xterm/addon-image.]  DCS   SIXEL       \"SIXEL Graphics\"          \"DCS Ps ; Ps ; Ps ; q \tPt ST\"  \"Draw SIXEL image.\"\n// @vt: #N  DCS   DECUDK      \"User Defined Keys\"       \"DCS Ps ; Ps \\| Pt ST\"           \"Definitions for user-defined keys.\"\n// @vt: #N  DCS   XTGETTCAP   \"Request Terminfo String\" \"DCS + q Pt ST\"                 \"Request Terminfo String.\"\n// @vt: #N  DCS   XTSETTCAP   \"Set Terminfo Data\"       \"DCS + p Pt ST\"                 \"Set Terminfo Data.\"\n// @vt: #N  OSC   1           \"Set Icon Name\"           \"OSC 1 ; Pt BEL\"                \"Set icon name.\"\n\n/**\n * Max length of the UTF32 input buffer. Real memory consumption is 4 times higher.\n */\nconst MAX_PARSEBUFFER_LENGTH = 131072;\n\n/**\n * Limit length of title and icon name stacks.\n */\nconst STACK_LIMIT = 10;\n\n// map params to window option\nfunction paramToWindowOption(n: number, opts: IWindowOptions): boolean {\n  if (n > 24) {\n    return opts.setWinLines || false;\n  }\n  switch (n) {\n    case 1: return !!opts.restoreWin;\n    case 2: return !!opts.minimizeWin;\n    case 3: return !!opts.setWinPosition;\n    case 4: return !!opts.setWinSizePixels;\n    case 5: return !!opts.raiseWin;\n    case 6: return !!opts.lowerWin;\n    case 7: return !!opts.refreshWin;\n    case 8: return !!opts.setWinSizeChars;\n    case 9: return !!opts.maximizeWin;\n    case 10: return !!opts.fullscreenWin;\n    case 11: return !!opts.getWinState;\n    case 13: return !!opts.getWinPosition;\n    case 14: return !!opts.getWinSizePixels;\n    case 15: return !!opts.getScreenSizePixels;\n    case 16: return !!opts.getCellSizePixels;\n    case 18: return !!opts.getWinSizeChars;\n    case 19: return !!opts.getScreenSizeChars;\n    case 20: return !!opts.getIconTitle;\n    case 21: return !!opts.getWinTitle;\n    case 22: return !!opts.pushTitle;\n    case 23: return !!opts.popTitle;\n    case 24: return !!opts.setWinLines;\n  }\n  return false;\n}\n\nexport enum WindowsOptionsReportType {\n  GET_WIN_SIZE_PIXELS = 0,\n  GET_CELL_SIZE_PIXELS = 1\n}\n\n// create a warning log if an async handler takes longer than the limit (in ms)\nconst SLOW_ASYNC_LIMIT = 5000;\n\n// Work variables to avoid garbage collection\nlet $temp = 0;\n\n/**\n * The terminal's standard implementation of IInputHandler, this handles all\n * input from the Parser.\n *\n * Refer to http://invisible-island.net/xterm/ctlseqs/ctlseqs.html to understand\n * each function's header comment.\n */\nexport class InputHandler extends Disposable implements IInputHandler {\n  private _parseBuffer: Uint32Array = new Uint32Array(4096);\n  private _stringDecoder: StringToUtf32 = new StringToUtf32();\n  private _utf8Decoder: Utf8ToUtf32 = new Utf8ToUtf32();\n  private _windowTitle = '';\n  private _iconName = '';\n  private _dirtyRowTracker: IDirtyRowTracker;\n  protected _windowTitleStack: string[] = [];\n  protected _iconNameStack: string[] = [];\n\n  private _curAttrData: IAttributeData = DEFAULT_ATTR_DATA.clone();\n  public getAttrData(): IAttributeData { return this._curAttrData; }\n  private _eraseAttrDataInternal: IAttributeData = DEFAULT_ATTR_DATA.clone();\n\n  private _activeBuffer: IBuffer;\n\n  private readonly _onRequestBell = this._register(new Emitter<void>());\n  public readonly onRequestBell = this._onRequestBell.event;\n  private readonly _onRequestRefreshRows = this._register(new Emitter<{ start: number, end: number } | undefined>());\n  public readonly onRequestRefreshRows = this._onRequestRefreshRows.event;\n  private readonly _onRequestReset = this._register(new Emitter<void>());\n  public readonly onRequestReset = this._onRequestReset.event;\n  private readonly _onRequestSendFocus = this._register(new Emitter<void>());\n  public readonly onRequestSendFocus = this._onRequestSendFocus.event;\n  private readonly _onRequestSyncScrollBar = this._register(new Emitter<void>());\n  public readonly onRequestSyncScrollBar = this._onRequestSyncScrollBar.event;\n  private readonly _onRequestWindowsOptionsReport = this._register(new Emitter<WindowsOptionsReportType>());\n  public readonly onRequestWindowsOptionsReport = this._onRequestWindowsOptionsReport.event;\n\n  private readonly _onA11yChar = this._register(new Emitter<string>());\n  public readonly onA11yChar = this._onA11yChar.event;\n  private readonly _onA11yTab = this._register(new Emitter<number>());\n  public readonly onA11yTab = this._onA11yTab.event;\n  private readonly _onCursorMove = this._register(new Emitter<void>());\n  public readonly onCursorMove = this._onCursorMove.event;\n  private readonly _onLineFeed = this._register(new Emitter<void>());\n  public readonly onLineFeed = this._onLineFeed.event;\n  private readonly _onScroll = this._register(new Emitter<number>());\n  public readonly onScroll = this._onScroll.event;\n  private readonly _onTitleChange = this._register(new Emitter<string>());\n  public readonly onTitleChange = this._onTitleChange.event;\n  private readonly _onColor = this._register(new Emitter<IColorEvent>());\n  public readonly onColor = this._onColor.event;\n\n  private _parseStack: IParseStack = {\n    paused: false,\n    cursorStartX: 0,\n    cursorStartY: 0,\n    decodedLength: 0,\n    position: 0\n  };\n\n  constructor(\n    private readonly _bufferService: IBufferService,\n    private readonly _charsetService: ICharsetService,\n    private readonly _coreService: ICoreService,\n    private readonly _logService: ILogService,\n    private readonly _optionsService: IOptionsService,\n    private readonly _oscLinkService: IOscLinkService,\n    private readonly _coreMouseService: ICoreMouseService,\n    private readonly _unicodeService: IUnicodeService,\n    private readonly _parser: IEscapeSequenceParser = new EscapeSequenceParser()\n  ) {\n    super();\n    this._register(this._parser);\n    this._dirtyRowTracker = new DirtyRowTracker(this._bufferService);\n\n    // Track properties used in performance critical code manually to avoid using slow getters\n    this._activeBuffer = this._bufferService.buffer;\n    this._register(this._bufferService.buffers.onBufferActivate(e => this._activeBuffer = e.activeBuffer));\n\n    /**\n     * custom fallback handlers\n     */\n    this._parser.setCsiHandlerFallback((ident, params) => {\n      this._logService.debug('Unknown CSI code: ', { identifier: this._parser.identToString(ident), params: params.toArray() });\n    });\n    this._parser.setEscHandlerFallback(ident => {\n      this._logService.debug('Unknown ESC code: ', { identifier: this._parser.identToString(ident) });\n    });\n    this._parser.setExecuteHandlerFallback(code => {\n      this._logService.debug('Unknown EXECUTE code: ', { code });\n    });\n    this._parser.setOscHandlerFallback((identifier, action, data) => {\n      this._logService.debug('Unknown OSC code: ', { identifier, action, data });\n    });\n    this._parser.setDcsHandlerFallback((ident, action, payload) => {\n      if (action === 'HOOK') {\n        payload = payload.toArray();\n      }\n      this._logService.debug('Unknown DCS code: ', { identifier: this._parser.identToString(ident), action, payload });\n    });\n\n    /**\n     * print handler\n     */\n    this._parser.setPrintHandler((data, start, end) => this.print(data, start, end));\n\n    /**\n     * CSI handler\n     */\n    this._parser.registerCsiHandler({ final: '@' }, params => this.insertChars(params));\n    this._parser.registerCsiHandler({ intermediates: ' ', final: '@' }, params => this.scrollLeft(params));\n    this._parser.registerCsiHandler({ final: 'A' }, params => this.cursorUp(params));\n    this._parser.registerCsiHandler({ intermediates: ' ', final: 'A' }, params => this.scrollRight(params));\n    this._parser.registerCsiHandler({ final: 'B' }, params => this.cursorDown(params));\n    this._parser.registerCsiHandler({ final: 'C' }, params => this.cursorForward(params));\n    this._parser.registerCsiHandler({ final: 'D' }, params => this.cursorBackward(params));\n    this._parser.registerCsiHandler({ final: 'E' }, params => this.cursorNextLine(params));\n    this._parser.registerCsiHandler({ final: 'F' }, params => this.cursorPrecedingLine(params));\n    this._parser.registerCsiHandler({ final: 'G' }, params => this.cursorCharAbsolute(params));\n    this._parser.registerCsiHandler({ final: 'H' }, params => this.cursorPosition(params));\n    this._parser.registerCsiHandler({ final: 'I' }, params => this.cursorForwardTab(params));\n    this._parser.registerCsiHandler({ final: 'J' }, params => this.eraseInDisplay(params, false));\n    this._parser.registerCsiHandler({ prefix: '?', final: 'J' }, params => this.eraseInDisplay(params, true));\n    this._parser.registerCsiHandler({ final: 'K' }, params => this.eraseInLine(params, false));\n    this._parser.registerCsiHandler({ prefix: '?', final: 'K' }, params => this.eraseInLine(params, true));\n    this._parser.registerCsiHandler({ final: 'L' }, params => this.insertLines(params));\n    this._parser.registerCsiHandler({ final: 'M' }, params => this.deleteLines(params));\n    this._parser.registerCsiHandler({ final: 'P' }, params => this.deleteChars(params));\n    this._parser.registerCsiHandler({ final: 'S' }, params => this.scrollUp(params));\n    this._parser.registerCsiHandler({ final: 'T' }, params => this.scrollDown(params));\n    this._parser.registerCsiHandler({ final: 'X' }, params => this.eraseChars(params));\n    this._parser.registerCsiHandler({ final: 'Z' }, params => this.cursorBackwardTab(params));\n    this._parser.registerCsiHandler({ final: '`' }, params => this.charPosAbsolute(params));\n    this._parser.registerCsiHandler({ final: 'a' }, params => this.hPositionRelative(params));\n    this._parser.registerCsiHandler({ final: 'b' }, params => this.repeatPrecedingCharacter(params));\n    this._parser.registerCsiHandler({ final: 'c' }, params => this.sendDeviceAttributesPrimary(params));\n    this._parser.registerCsiHandler({ prefix: '>', final: 'c' }, params => this.sendDeviceAttributesSecondary(params));\n    this._parser.registerCsiHandler({ final: 'd' }, params => this.linePosAbsolute(params));\n    this._parser.registerCsiHandler({ final: 'e' }, params => this.vPositionRelative(params));\n    this._parser.registerCsiHandler({ final: 'f' }, params => this.hVPosition(params));\n    this._parser.registerCsiHandler({ final: 'g' }, params => this.tabClear(params));\n    this._parser.registerCsiHandler({ final: 'h' }, params => this.setMode(params));\n    this._parser.registerCsiHandler({ prefix: '?', final: 'h' }, params => this.setModePrivate(params));\n    this._parser.registerCsiHandler({ final: 'l' }, params => this.resetMode(params));\n    this._parser.registerCsiHandler({ prefix: '?', final: 'l' }, params => this.resetModePrivate(params));\n    this._parser.registerCsiHandler({ final: 'm' }, params => this.charAttributes(params));\n    this._parser.registerCsiHandler({ final: 'n' }, params => this.deviceStatus(params));\n    this._parser.registerCsiHandler({ prefix: '?', final: 'n' }, params => this.deviceStatusPrivate(params));\n    this._parser.registerCsiHandler({ intermediates: '!', final: 'p' }, params => this.softReset(params));\n    this._parser.registerCsiHandler({ intermediates: ' ', final: 'q' }, params => this.setCursorStyle(params));\n    this._parser.registerCsiHandler({ final: 'r' }, params => this.setScrollRegion(params));\n    this._parser.registerCsiHandler({ final: 's' }, params => this.saveCursor(params));\n    this._parser.registerCsiHandler({ final: 't' }, params => this.windowOptions(params));\n    this._parser.registerCsiHandler({ final: 'u' }, params => this.restoreCursor(params));\n    this._parser.registerCsiHandler({ intermediates: '\\'', final: '}' }, params => this.insertColumns(params));\n    this._parser.registerCsiHandler({ intermediates: '\\'', final: '~' }, params => this.deleteColumns(params));\n    this._parser.registerCsiHandler({ intermediates: '\"', final: 'q' }, params => this.selectProtected(params));\n    this._parser.registerCsiHandler({ intermediates: '$', final: 'p' }, params => this.requestMode(params, true));\n    this._parser.registerCsiHandler({ prefix: '?', intermediates: '$', final: 'p' }, params => this.requestMode(params, false));\n\n    /**\n     * execute handler\n     */\n    this._parser.setExecuteHandler(C0.BEL, () => this.bell());\n    this._parser.setExecuteHandler(C0.LF, () => this.lineFeed());\n    this._parser.setExecuteHandler(C0.VT, () => this.lineFeed());\n    this._parser.setExecuteHandler(C0.FF, () => this.lineFeed());\n    this._parser.setExecuteHandler(C0.CR, () => this.carriageReturn());\n    this._parser.setExecuteHandler(C0.BS, () => this.backspace());\n    this._parser.setExecuteHandler(C0.HT, () => this.tab());\n    this._parser.setExecuteHandler(C0.SO, () => this.shiftOut());\n    this._parser.setExecuteHandler(C0.SI, () => this.shiftIn());\n    // FIXME:   What do to with missing? Old code just added those to print.\n\n    this._parser.setExecuteHandler(C1.IND, () => this.index());\n    this._parser.setExecuteHandler(C1.NEL, () => this.nextLine());\n    this._parser.setExecuteHandler(C1.HTS, () => this.tabSet());\n\n    /**\n     * OSC handler\n     */\n    //   0 - icon name + title\n    this._parser.registerOscHandler(0, new OscHandler(data => { this.setTitle(data); this.setIconName(data); return true; }));\n    //   1 - icon name\n    this._parser.registerOscHandler(1, new OscHandler(data => this.setIconName(data)));\n    //   2 - title\n    this._parser.registerOscHandler(2, new OscHandler(data => this.setTitle(data)));\n    //   3 - set property X in the form \"prop=value\"\n    //   4 - Change Color Number\n    this._parser.registerOscHandler(4, new OscHandler(data => this.setOrReportIndexedColor(data)));\n    //   5 - Change Special Color Number\n    //   6 - Enable/disable Special Color Number c\n    //   7 - current directory? (not in xterm spec, see https://gitlab.com/gnachman/iterm2/issues/3939)\n    //   8 - create hyperlink (not in xterm spec, see https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda)\n    this._parser.registerOscHandler(8, new OscHandler(data => this.setHyperlink(data)));\n    //  10 - Change VT100 text foreground color to Pt.\n    this._parser.registerOscHandler(10, new OscHandler(data => this.setOrReportFgColor(data)));\n    //  11 - Change VT100 text background color to Pt.\n    this._parser.registerOscHandler(11, new OscHandler(data => this.setOrReportBgColor(data)));\n    //  12 - Change text cursor color to Pt.\n    this._parser.registerOscHandler(12, new OscHandler(data => this.setOrReportCursorColor(data)));\n    //  13 - Change mouse foreground color to Pt.\n    //  14 - Change mouse background color to Pt.\n    //  15 - Change Tektronix foreground color to Pt.\n    //  16 - Change Tektronix background color to Pt.\n    //  17 - Change highlight background color to Pt.\n    //  18 - Change Tektronix cursor color to Pt.\n    //  19 - Change highlight foreground color to Pt.\n    //  46 - Change Log File to Pt.\n    //  50 - Set Font to Pt.\n    //  51 - reserved for Emacs shell.\n    //  52 - Manipulate Selection Data.\n    // 104 ; c - Reset Color Number c.\n    this._parser.registerOscHandler(104, new OscHandler(data => this.restoreIndexedColor(data)));\n    // 105 ; c - Reset Special Color Number c.\n    // 106 ; c; f - Enable/disable Special Color Number c.\n    // 110 - Reset VT100 text foreground color.\n    this._parser.registerOscHandler(110, new OscHandler(data => this.restoreFgColor(data)));\n    // 111 - Reset VT100 text background color.\n    this._parser.registerOscHandler(111, new OscHandler(data => this.restoreBgColor(data)));\n    // 112 - Reset text cursor color.\n    this._parser.registerOscHandler(112, new OscHandler(data => this.restoreCursorColor(data)));\n    // 113 - Reset mouse foreground color.\n    // 114 - Reset mouse background color.\n    // 115 - Reset Tektronix foreground color.\n    // 116 - Reset Tektronix background color.\n    // 117 - Reset highlight color.\n    // 118 - Reset Tektronix cursor color.\n    // 119 - Reset highlight foreground color.\n\n    /**\n     * ESC handlers\n     */\n    this._parser.registerEscHandler({ final: '7' }, () => this.saveCursor());\n    this._parser.registerEscHandler({ final: '8' }, () => this.restoreCursor());\n    this._parser.registerEscHandler({ final: 'D' }, () => this.index());\n    this._parser.registerEscHandler({ final: 'E' }, () => this.nextLine());\n    this._parser.registerEscHandler({ final: 'H' }, () => this.tabSet());\n    this._parser.registerEscHandler({ final: 'M' }, () => this.reverseIndex());\n    this._parser.registerEscHandler({ final: '=' }, () => this.keypadApplicationMode());\n    this._parser.registerEscHandler({ final: '>' }, () => this.keypadNumericMode());\n    this._parser.registerEscHandler({ final: 'c' }, () => this.fullReset());\n    this._parser.registerEscHandler({ final: 'n' }, () => this.setgLevel(2));\n    this._parser.registerEscHandler({ final: 'o' }, () => this.setgLevel(3));\n    this._parser.registerEscHandler({ final: '|' }, () => this.setgLevel(3));\n    this._parser.registerEscHandler({ final: '}' }, () => this.setgLevel(2));\n    this._parser.registerEscHandler({ final: '~' }, () => this.setgLevel(1));\n    this._parser.registerEscHandler({ intermediates: '%', final: '@' }, () => this.selectDefaultCharset());\n    this._parser.registerEscHandler({ intermediates: '%', final: 'G' }, () => this.selectDefaultCharset());\n    for (const flag in CHARSETS) {\n      this._parser.registerEscHandler({ intermediates: '(', final: flag }, () => this.selectCharset('(' + flag));\n      this._parser.registerEscHandler({ intermediates: ')', final: flag }, () => this.selectCharset(')' + flag));\n      this._parser.registerEscHandler({ intermediates: '*', final: flag }, () => this.selectCharset('*' + flag));\n      this._parser.registerEscHandler({ intermediates: '+', final: flag }, () => this.selectCharset('+' + flag));\n      this._parser.registerEscHandler({ intermediates: '-', final: flag }, () => this.selectCharset('-' + flag));\n      this._parser.registerEscHandler({ intermediates: '.', final: flag }, () => this.selectCharset('.' + flag));\n      this._parser.registerEscHandler({ intermediates: '/', final: flag }, () => this.selectCharset('/' + flag)); // TODO: supported?\n    }\n    this._parser.registerEscHandler({ intermediates: '#', final: '8' }, () => this.screenAlignmentPattern());\n\n    /**\n     * error handler\n     */\n    this._parser.setErrorHandler((state: IParsingState) => {\n      this._logService.error('Parsing error: ', state);\n      return state;\n    });\n\n    /**\n     * DCS handler\n     */\n    this._parser.registerDcsHandler({ intermediates: '$', final: 'q' }, new DcsHandler((data, params) => this.requestStatusString(data, params)));\n  }\n\n  /**\n   * Async parse support.\n   */\n  private _preserveStack(cursorStartX: number, cursorStartY: number, decodedLength: number, position: number): void {\n    this._parseStack.paused = true;\n    this._parseStack.cursorStartX = cursorStartX;\n    this._parseStack.cursorStartY = cursorStartY;\n    this._parseStack.decodedLength = decodedLength;\n    this._parseStack.position = position;\n  }\n\n  private _logSlowResolvingAsync(p: Promise<boolean>): void {\n    // log a limited warning about an async handler taking too long\n    if (this._logService.logLevel <= LogLevelEnum.WARN) {\n      Promise.race([p, new Promise((res, rej) => setTimeout(() => rej('#SLOW_TIMEOUT'), SLOW_ASYNC_LIMIT))])\n        .catch(err => {\n          if (err !== '#SLOW_TIMEOUT') {\n            throw err;\n          }\n          console.warn(`async parser handler taking longer than ${SLOW_ASYNC_LIMIT} ms`);\n        });\n    }\n  }\n\n  private _getCurrentLinkId(): number {\n    return this._curAttrData.extended.urlId;\n  }\n\n  /**\n   * Parse call with async handler support.\n   *\n   * Whether the stack state got preserved for the next call, is indicated by the return value:\n   * - undefined (void):\n   *   all handlers were sync, no stack save, continue normally with next chunk\n   * - Promise\\<boolean\\>:\n   *   execution stopped at async handler, stack saved, continue with same chunk and the promise\n   *   resolve value as `promiseResult` until the method returns `undefined`\n   *\n   * Note: This method should only be called by `Terminal.write` to ensure correct execution order\n   * and proper continuation of async parser handlers.\n   */\n  public parse(data: string | Uint8Array, promiseResult?: boolean): void | Promise<boolean> {\n    let result: void | Promise<boolean>;\n    let cursorStartX = this._activeBuffer.x;\n    let cursorStartY = this._activeBuffer.y;\n    let start = 0;\n    const wasPaused = this._parseStack.paused;\n\n    if (wasPaused) {\n      // assumption: _parseBuffer never mutates between async calls\n      if (result = this._parser.parse(this._parseBuffer, this._parseStack.decodedLength, promiseResult)) {\n        this._logSlowResolvingAsync(result);\n        return result;\n      }\n      cursorStartX = this._parseStack.cursorStartX;\n      cursorStartY = this._parseStack.cursorStartY;\n      this._parseStack.paused = false;\n      if (data.length > MAX_PARSEBUFFER_LENGTH) {\n        start = this._parseStack.position + MAX_PARSEBUFFER_LENGTH;\n      }\n    }\n\n    // Log debug data, the log level gate is to prevent extra work in this hot path\n    if (this._logService.logLevel <= LogLevelEnum.DEBUG) {\n      this._logService.debug(`parsing data${typeof data === 'string' ? ` \"${data}\"` : ` \"${Array.prototype.map.call(data, e => String.fromCharCode(e)).join('')}\"`}`, typeof data === 'string'\n        ? data.split('').map(e => e.charCodeAt(0))\n        : data\n      );\n    }\n\n    // resize input buffer if needed\n    if (this._parseBuffer.length < data.length) {\n      if (this._parseBuffer.length < MAX_PARSEBUFFER_LENGTH) {\n        this._parseBuffer = new Uint32Array(Math.min(data.length, MAX_PARSEBUFFER_LENGTH));\n      }\n    }\n\n    // Clear the dirty row service so we know which lines changed as a result of parsing\n    // Important: do not clear between async calls, otherwise we lost pending update information.\n    if (!wasPaused) {\n      this._dirtyRowTracker.clearRange();\n    }\n\n    // process big data in smaller chunks\n    if (data.length > MAX_PARSEBUFFER_LENGTH) {\n      for (let i = start; i < data.length; i += MAX_PARSEBUFFER_LENGTH) {\n        const end = i + MAX_PARSEBUFFER_LENGTH < data.length ? i + MAX_PARSEBUFFER_LENGTH : data.length;\n        const len = (typeof data === 'string')\n          ? this._stringDecoder.decode(data.substring(i, end), this._parseBuffer)\n          : this._utf8Decoder.decode(data.subarray(i, end), this._parseBuffer);\n        if (result = this._parser.parse(this._parseBuffer, len)) {\n          this._preserveStack(cursorStartX, cursorStartY, len, i);\n          this._logSlowResolvingAsync(result);\n          return result;\n        }\n      }\n    } else {\n      if (!wasPaused) {\n        const len = (typeof data === 'string')\n          ? this._stringDecoder.decode(data, this._parseBuffer)\n          : this._utf8Decoder.decode(data, this._parseBuffer);\n        if (result = this._parser.parse(this._parseBuffer, len)) {\n          this._preserveStack(cursorStartX, cursorStartY, len, 0);\n          this._logSlowResolvingAsync(result);\n          return result;\n        }\n      }\n    }\n\n    if (this._activeBuffer.x !== cursorStartX || this._activeBuffer.y !== cursorStartY) {\n      this._onCursorMove.fire();\n    }\n\n    // Refresh any dirty rows accumulated as part of parsing, fire only for rows within the\n    // _viewport_ which is relative to ydisp, not relative to ybase.\n    const viewportEnd = this._dirtyRowTracker.end + (this._bufferService.buffer.ybase - this._bufferService.buffer.ydisp);\n    const viewportStart = this._dirtyRowTracker.start + (this._bufferService.buffer.ybase - this._bufferService.buffer.ydisp);\n    if (viewportStart < this._bufferService.rows) {\n      this._onRequestRefreshRows.fire({\n        start: Math.min(viewportStart, this._bufferService.rows - 1),\n        end: Math.min(viewportEnd, this._bufferService.rows - 1)\n      });\n    }\n  }\n\n  public print(data: Uint32Array, start: number, end: number): void {\n    let code: number;\n    let chWidth: number;\n    const charset = this._charsetService.charset;\n    const screenReaderMode = this._optionsService.rawOptions.screenReaderMode;\n    const cols = this._bufferService.cols;\n    const wraparoundMode = this._coreService.decPrivateModes.wraparound;\n    const insertMode = this._coreService.modes.insertMode;\n    const curAttr = this._curAttrData;\n    let bufferRow = this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y)!;\n\n    this._dirtyRowTracker.markDirty(this._activeBuffer.y);\n\n    // handle wide chars: reset start_cell-1 if we would overwrite the second cell of a wide char\n    if (this._activeBuffer.x && end - start > 0 && bufferRow.getWidth(this._activeBuffer.x - 1) === 2) {\n      bufferRow.setCellFromCodepoint(this._activeBuffer.x - 1, 0, 1, curAttr);\n    }\n\n    let precedingJoinState = this._parser.precedingJoinState;\n    for (let pos = start; pos < end; ++pos) {\n      code = data[pos];\n\n      // get charset replacement character\n      // charset is only defined for ASCII, therefore we only\n      // search for an replacement char if code < 127\n      if (code < 127 && charset) {\n        const ch = charset[String.fromCharCode(code)];\n        if (ch) {\n          code = ch.charCodeAt(0);\n        }\n      }\n\n      const currentInfo = this._unicodeService.charProperties(code, precedingJoinState);\n      chWidth = UnicodeService.extractWidth(currentInfo);\n      const shouldJoin = UnicodeService.extractShouldJoin(currentInfo);\n      const oldWidth = shouldJoin ? UnicodeService.extractWidth(precedingJoinState) : 0;\n      precedingJoinState = currentInfo;\n\n      if (screenReaderMode) {\n        this._onA11yChar.fire(stringFromCodePoint(code));\n      }\n      if (this._getCurrentLinkId()) {\n        this._oscLinkService.addLineToLink(this._getCurrentLinkId(), this._activeBuffer.ybase + this._activeBuffer.y);\n      }\n\n      // goto next line if ch would overflow\n      // NOTE: To avoid costly width checks here,\n      // the terminal does not allow a cols < 2.\n      if (this._activeBuffer.x + chWidth - oldWidth > cols) {\n        // autowrap - DECAWM\n        // automatically wraps to the beginning of the next line\n        if (wraparoundMode) {\n          const oldRow = bufferRow;\n          let oldCol = this._activeBuffer.x - oldWidth;\n          this._activeBuffer.x = oldWidth;\n          this._activeBuffer.y++;\n          if (this._activeBuffer.y === this._activeBuffer.scrollBottom + 1) {\n            this._activeBuffer.y--;\n            this._bufferService.scroll(this._eraseAttrData(), true);\n          } else {\n            if (this._activeBuffer.y >= this._bufferService.rows) {\n              this._activeBuffer.y = this._bufferService.rows - 1;\n            }\n            // The line already exists (eg. the initial viewport), mark it as a\n            // wrapped line\n            this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y)!.isWrapped = true;\n          }\n          // row changed, get it again\n          bufferRow = this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y)!;\n          if (oldWidth > 0 && bufferRow instanceof BufferLine) {\n            // Combining character widens 1 column to 2.\n            // Move old character to next line.\n            bufferRow.copyCellsFrom(oldRow as BufferLine,\n              oldCol, 0, oldWidth, false);\n          }\n          // clear left over cells to the right\n          while (oldCol < cols) {\n            oldRow.setCellFromCodepoint(oldCol++, 0, 1, curAttr);\n          }\n        } else {\n          this._activeBuffer.x = cols - 1;\n          if (chWidth === 2) {\n            // FIXME: check for xterm behavior\n            // What to do here? We got a wide char that does not fit into last cell\n            continue;\n          }\n        }\n      }\n\n      // insert combining char at last cursor position\n      // this._activeBuffer.x should never be 0 for a combining char\n      // since they always follow a cell consuming char\n      // therefore we can test for this._activeBuffer.x to avoid overflow left\n      if (shouldJoin && this._activeBuffer.x) {\n        const offset = bufferRow.getWidth(this._activeBuffer.x - 1) ? 1 : 2;\n        // if empty cell after fullwidth, need to go 2 cells back\n        // it is save to step 2 cells back here\n        // since an empty cell is only set by fullwidth chars\n        bufferRow.addCodepointToCell(this._activeBuffer.x - offset,\n          code, chWidth);\n        for (let delta = chWidth - oldWidth; --delta >= 0; ) {\n          bufferRow.setCellFromCodepoint(this._activeBuffer.x++, 0, 0, curAttr);\n        }\n        continue;\n      }\n\n      // insert mode: move characters to right\n      if (insertMode) {\n        // right shift cells according to the width\n        bufferRow.insertCells(this._activeBuffer.x, chWidth - oldWidth, this._activeBuffer.getNullCell(curAttr));\n        // test last cell - since the last cell has only room for\n        // a halfwidth char any fullwidth shifted there is lost\n        // and will be set to empty cell\n        if (bufferRow.getWidth(cols - 1) === 2) {\n          bufferRow.setCellFromCodepoint(cols - 1, NULL_CELL_CODE, NULL_CELL_WIDTH, curAttr);\n        }\n      }\n\n      // write current char to buffer and advance cursor\n      bufferRow.setCellFromCodepoint(this._activeBuffer.x++, code, chWidth, curAttr);\n\n      // fullwidth char - also set next cell to placeholder stub and advance cursor\n      // for graphemes bigger than fullwidth we can simply loop to zero\n      // we already made sure above, that this._activeBuffer.x + chWidth will not overflow right\n      if (chWidth > 0) {\n        while (--chWidth) {\n          // other than a regular empty cell a cell following a wide char has no width\n          bufferRow.setCellFromCodepoint(this._activeBuffer.x++, 0, 0, curAttr);\n        }\n      }\n    }\n\n    this._parser.precedingJoinState = precedingJoinState;\n\n    // handle wide chars: reset cell to the right if it is second cell of a wide char\n    if (this._activeBuffer.x < cols && end - start > 0 && bufferRow.getWidth(this._activeBuffer.x) === 0 && !bufferRow.hasContent(this._activeBuffer.x)) {\n      bufferRow.setCellFromCodepoint(this._activeBuffer.x, 0, 1, curAttr);\n    }\n\n    this._dirtyRowTracker.markDirty(this._activeBuffer.y);\n  }\n\n  /**\n   * Forward registerCsiHandler from parser.\n   */\n  public registerCsiHandler(id: IFunctionIdentifier, callback: (params: IParams) => boolean | Promise<boolean>): IDisposable {\n    if (id.final === 't' && !id.prefix && !id.intermediates) {\n      // security: always check whether window option is allowed\n      return this._parser.registerCsiHandler(id, params => {\n        if (!paramToWindowOption(params.params[0], this._optionsService.rawOptions.windowOptions)) {\n          return true;\n        }\n        return callback(params);\n      });\n    }\n    return this._parser.registerCsiHandler(id, callback);\n  }\n\n  /**\n   * Forward registerDcsHandler from parser.\n   */\n  public registerDcsHandler(id: IFunctionIdentifier, callback: (data: string, param: IParams) => boolean | Promise<boolean>): IDisposable {\n    return this._parser.registerDcsHandler(id, new DcsHandler(callback));\n  }\n\n  /**\n   * Forward registerEscHandler from parser.\n   */\n  public registerEscHandler(id: IFunctionIdentifier, callback: () => boolean | Promise<boolean>): IDisposable {\n    return this._parser.registerEscHandler(id, callback);\n  }\n\n  /**\n   * Forward registerOscHandler from parser.\n   */\n  public registerOscHandler(ident: number, callback: (data: string) => boolean | Promise<boolean>): IDisposable {\n    return this._parser.registerOscHandler(ident, new OscHandler(callback));\n  }\n\n  /**\n   * BEL\n   * Bell (Ctrl-G).\n   *\n   * @vt: #Y   C0    BEL   \"Bell\"  \"\\a, \\x07\"  \"Ring the bell.\"\n   * The behavior of the bell is further customizable with `ITerminalOptions.bellStyle`\n   * and `ITerminalOptions.bellSound`.\n   */\n  public bell(): boolean {\n    this._onRequestBell.fire();\n    return true;\n  }\n\n  /**\n   * LF\n   * Line Feed or New Line (NL).  (LF  is Ctrl-J).\n   *\n   * @vt: #Y   C0    LF   \"Line Feed\"            \"\\n, \\x0A\"  \"Move the cursor one row down, scrolling if needed.\"\n   * Scrolling is restricted to scroll margins and will only happen on the bottom line.\n   *\n   * @vt: #Y   C0    VT   \"Vertical Tabulation\"  \"\\v, \\x0B\"  \"Treated as LF.\"\n   * @vt: #Y   C0    FF   \"Form Feed\"            \"\\f, \\x0C\"  \"Treated as LF.\"\n   */\n  public lineFeed(): boolean {\n    this._dirtyRowTracker.markDirty(this._activeBuffer.y);\n    if (this._optionsService.rawOptions.convertEol) {\n      this._activeBuffer.x = 0;\n    }\n    this._activeBuffer.y++;\n    if (this._activeBuffer.y === this._activeBuffer.scrollBottom + 1) {\n      this._activeBuffer.y--;\n      this._bufferService.scroll(this._eraseAttrData());\n    } else if (this._activeBuffer.y >= this._bufferService.rows) {\n      this._activeBuffer.y = this._bufferService.rows - 1;\n    } else {\n      // There was an explicit line feed (not just a carriage return), so clear the wrapped state of\n      // the line. This is particularly important on conpty/Windows where revisiting lines to\n      // reprint is common, especially on resize. Note that the windowsMode wrapped line heuristics\n      // can mess with this so windowsMode should be disabled, which is recommended on Windows build\n      // 21376 and above.\n      this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y)!.isWrapped = false;\n    }\n    // If the end of the line is hit, prevent this action from wrapping around to the next line.\n    if (this._activeBuffer.x >= this._bufferService.cols) {\n      this._activeBuffer.x--;\n    }\n    this._dirtyRowTracker.markDirty(this._activeBuffer.y);\n\n    this._onLineFeed.fire();\n    return true;\n  }\n\n  /**\n   * CR\n   * Carriage Return (Ctrl-M).\n   *\n   * @vt: #Y   C0    CR   \"Carriage Return\"  \"\\r, \\x0D\"  \"Move the cursor to the beginning of the row.\"\n   */\n  public carriageReturn(): boolean {\n    this._activeBuffer.x = 0;\n    return true;\n  }\n\n  /**\n   * BS\n   * Backspace (Ctrl-H).\n   *\n   * @vt: #Y   C0    BS   \"Backspace\"  \"\\b, \\x08\"  \"Move the cursor one position to the left.\"\n   * By default it is not possible to move the cursor past the leftmost position.\n   * If `reverse wrap-around` (`CSI ? 45 h`) is set, a previous soft line wrap (DECAWM)\n   * can be undone with BS within the scroll margins. In that case the cursor will wrap back\n   * to the end of the previous row. Note that it is not possible to peek back into the scrollbuffer\n   * with the cursor, thus at the home position (top-leftmost cell) this has no effect.\n   */\n  public backspace(): boolean {\n    // reverse wrap-around is disabled\n    if (!this._coreService.decPrivateModes.reverseWraparound) {\n      this._restrictCursor();\n      if (this._activeBuffer.x > 0) {\n        this._activeBuffer.x--;\n      }\n      return true;\n    }\n\n    // reverse wrap-around is enabled\n    // other than for normal operation mode, reverse wrap-around allows the cursor\n    // to be at x=cols to be able to address the last cell of a row by BS\n    this._restrictCursor(this._bufferService.cols);\n\n    if (this._activeBuffer.x > 0) {\n      this._activeBuffer.x--;\n    } else {\n      /**\n       * reverse wrap-around handling:\n       * Our implementation deviates from xterm on purpose. Details:\n       * - only previous soft NLs can be reversed (isWrapped=true)\n       * - only works within scrollborders (top/bottom, left/right not yet supported)\n       * - cannot peek into scrollbuffer\n       * - any cursor movement sequence keeps working as expected\n       */\n      if (this._activeBuffer.x === 0\n        && this._activeBuffer.y > this._activeBuffer.scrollTop\n        && this._activeBuffer.y <= this._activeBuffer.scrollBottom\n        && this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y)?.isWrapped) {\n        this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y)!.isWrapped = false;\n        this._activeBuffer.y--;\n        this._activeBuffer.x = this._bufferService.cols - 1;\n        // find last taken cell - last cell can have 3 different states:\n        // - hasContent(true) + hasWidth(1): narrow char - we are done\n        // - hasWidth(0): second part of wide char - we are done\n        // - hasContent(false) + hasWidth(1): empty cell due to early wrapping wide char, go one\n        //   cell further back\n        const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y)!;\n        if (line.hasWidth(this._activeBuffer.x) && !line.hasContent(this._activeBuffer.x)) {\n          this._activeBuffer.x--;\n          // We do this only once, since width=1 + hasContent=false currently happens only once\n          // before early wrapping of a wide char.\n          // This needs to be fixed once we support graphemes taking more than 2 cells.\n        }\n      }\n    }\n    this._restrictCursor();\n    return true;\n  }\n\n  /**\n   * TAB\n   * Horizontal Tab (HT) (Ctrl-I).\n   *\n   * @vt: #Y   C0    HT   \"Horizontal Tabulation\"  \"\\t, \\x09\"  \"Move the cursor to the next character tab stop.\"\n   */\n  public tab(): boolean {\n    if (this._activeBuffer.x >= this._bufferService.cols) {\n      return true;\n    }\n    const originalX = this._activeBuffer.x;\n    this._activeBuffer.x = this._activeBuffer.nextStop();\n    if (this._optionsService.rawOptions.screenReaderMode) {\n      this._onA11yTab.fire(this._activeBuffer.x - originalX);\n    }\n    return true;\n  }\n\n  /**\n   * SO\n   * Shift Out (Ctrl-N) -> Switch to Alternate Character Set.  This invokes the\n   * G1 character set.\n   *\n   * @vt: #P[Only limited ISO-2022 charset support.]  C0    SO   \"Shift Out\"  \"\\x0E\"  \"Switch to an alternative character set.\"\n   */\n  public shiftOut(): boolean {\n    this._charsetService.setgLevel(1);\n    return true;\n  }\n\n  /**\n   * SI\n   * Shift In (Ctrl-O) -> Switch to Standard Character Set.  This invokes the G0\n   * character set (the default).\n   *\n   * @vt: #Y   C0    SI   \"Shift In\"   \"\\x0F\"  \"Return to regular character set after Shift Out.\"\n   */\n  public shiftIn(): boolean {\n    this._charsetService.setgLevel(0);\n    return true;\n  }\n\n  /**\n   * Restrict cursor to viewport size / scroll margin (origin mode).\n   */\n  private _restrictCursor(maxCol: number = this._bufferService.cols - 1): void {\n    this._activeBuffer.x = Math.min(maxCol, Math.max(0, this._activeBuffer.x));\n    this._activeBuffer.y = this._coreService.decPrivateModes.origin\n      ? Math.min(this._activeBuffer.scrollBottom, Math.max(this._activeBuffer.scrollTop, this._activeBuffer.y))\n      : Math.min(this._bufferService.rows - 1, Math.max(0, this._activeBuffer.y));\n    this._dirtyRowTracker.markDirty(this._activeBuffer.y);\n  }\n\n  /**\n   * Set absolute cursor position.\n   */\n  private _setCursor(x: number, y: number): void {\n    this._dirtyRowTracker.markDirty(this._activeBuffer.y);\n    if (this._coreService.decPrivateModes.origin) {\n      this._activeBuffer.x = x;\n      this._activeBuffer.y = this._activeBuffer.scrollTop + y;\n    } else {\n      this._activeBuffer.x = x;\n      this._activeBuffer.y = y;\n    }\n    this._restrictCursor();\n    this._dirtyRowTracker.markDirty(this._activeBuffer.y);\n  }\n\n  /**\n   * Set relative cursor position.\n   */\n  private _moveCursor(x: number, y: number): void {\n    // for relative changes we have to make sure we are within 0 .. cols/rows - 1\n    // before calculating the new position\n    this._restrictCursor();\n    this._setCursor(this._activeBuffer.x + x, this._activeBuffer.y + y);\n  }\n\n  /**\n   * CSI Ps A\n   * Cursor Up Ps Times (default = 1) (CUU).\n   *\n   * @vt: #Y CSI CUU   \"Cursor Up\"   \"CSI Ps A\"  \"Move cursor `Ps` times up (default=1).\"\n   * If the cursor would pass the top scroll margin, it will stop there.\n   */\n  public cursorUp(params: IParams): boolean {\n    // stop at scrollTop\n    const diffToTop = this._activeBuffer.y - this._activeBuffer.scrollTop;\n    if (diffToTop >= 0) {\n      this._moveCursor(0, -Math.min(diffToTop, params.params[0] || 1));\n    } else {\n      this._moveCursor(0, -(params.params[0] || 1));\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps B\n   * Cursor Down Ps Times (default = 1) (CUD).\n   *\n   * @vt: #Y CSI CUD   \"Cursor Down\"   \"CSI Ps B\"  \"Move cursor `Ps` times down (default=1).\"\n   * If the cursor would pass the bottom scroll margin, it will stop there.\n   */\n  public cursorDown(params: IParams): boolean {\n    // stop at scrollBottom\n    const diffToBottom = this._activeBuffer.scrollBottom - this._activeBuffer.y;\n    if (diffToBottom >= 0) {\n      this._moveCursor(0, Math.min(diffToBottom, params.params[0] || 1));\n    } else {\n      this._moveCursor(0, params.params[0] || 1);\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps C\n   * Cursor Forward Ps Times (default = 1) (CUF).\n   *\n   * @vt: #Y CSI CUF   \"Cursor Forward\"    \"CSI Ps C\"  \"Move cursor `Ps` times forward (default=1).\"\n   */\n  public cursorForward(params: IParams): boolean {\n    this._moveCursor(params.params[0] || 1, 0);\n    return true;\n  }\n\n  /**\n   * CSI Ps D\n   * Cursor Backward Ps Times (default = 1) (CUB).\n   *\n   * @vt: #Y CSI CUB   \"Cursor Backward\"   \"CSI Ps D\"  \"Move cursor `Ps` times backward (default=1).\"\n   */\n  public cursorBackward(params: IParams): boolean {\n    this._moveCursor(-(params.params[0] || 1), 0);\n    return true;\n  }\n\n  /**\n   * CSI Ps E\n   * Cursor Next Line Ps Times (default = 1) (CNL).\n   * Other than cursorDown (CUD) also set the cursor to first column.\n   *\n   * @vt: #Y CSI CNL   \"Cursor Next Line\"  \"CSI Ps E\"  \"Move cursor `Ps` times down (default=1) and to the first column.\"\n   * Same as CUD, additionally places the cursor at the first column.\n   */\n  public cursorNextLine(params: IParams): boolean {\n    this.cursorDown(params);\n    this._activeBuffer.x = 0;\n    return true;\n  }\n\n  /**\n   * CSI Ps F\n   * Cursor Previous Line Ps Times (default = 1) (CPL).\n   * Other than cursorUp (CUU) also set the cursor to first column.\n   *\n   * @vt: #Y CSI CPL   \"Cursor Backward\"   \"CSI Ps F\"  \"Move cursor `Ps` times up (default=1) and to the first column.\"\n   * Same as CUU, additionally places the cursor at the first column.\n   */\n  public cursorPrecedingLine(params: IParams): boolean {\n    this.cursorUp(params);\n    this._activeBuffer.x = 0;\n    return true;\n  }\n\n  /**\n   * CSI Ps G\n   * Cursor Character Absolute  [column] (default = [row,1]) (CHA).\n   *\n   * @vt: #Y CSI CHA   \"Cursor Horizontal Absolute\" \"CSI Ps G\" \"Move cursor to `Ps`-th column of the active row (default=1).\"\n   */\n  public cursorCharAbsolute(params: IParams): boolean {\n    this._setCursor((params.params[0] || 1) - 1, this._activeBuffer.y);\n    return true;\n  }\n\n  /**\n   * CSI Ps ; Ps H\n   * Cursor Position [row;column] (default = [1,1]) (CUP).\n   *\n   * @vt: #Y CSI CUP   \"Cursor Position\"   \"CSI Ps ; Ps H\"  \"Set cursor to position [`Ps`, `Ps`] (default = [1, 1]).\"\n   * If ORIGIN mode is set, places the cursor to the absolute position within the scroll margins.\n   * If ORIGIN mode is not set, places the cursor to the absolute position within the viewport.\n   * Note that the coordinates are 1-based, thus the top left position starts at `1 ; 1`.\n   */\n  public cursorPosition(params: IParams): boolean {\n    this._setCursor(\n      // col\n      (params.length >= 2) ? (params.params[1] || 1) - 1 : 0,\n      // row\n      (params.params[0] || 1) - 1\n    );\n    return true;\n  }\n\n  /**\n   * CSI Pm `  Character Position Absolute\n   *   [column] (default = [row,1]) (HPA).\n   * Currently same functionality as CHA.\n   *\n   * @vt: #Y CSI HPA   \"Horizontal Position Absolute\"  \"CSI Ps ` \" \"Same as CHA.\"\n   */\n  public charPosAbsolute(params: IParams): boolean {\n    this._setCursor((params.params[0] || 1) - 1, this._activeBuffer.y);\n    return true;\n  }\n\n  /**\n   * CSI Pm a  Character Position Relative\n   *   [columns] (default = [row,col+1]) (HPR)\n   *\n   * @vt: #Y CSI HPR   \"Horizontal Position Relative\"  \"CSI Ps a\"  \"Same as CUF.\"\n   */\n  public hPositionRelative(params: IParams): boolean {\n    this._moveCursor(params.params[0] || 1, 0);\n    return true;\n  }\n\n  /**\n   * CSI Pm d  Vertical Position Absolute (VPA)\n   *   [row] (default = [1,column])\n   *\n   * @vt: #Y CSI VPA   \"Vertical Position Absolute\"    \"CSI Ps d\"  \"Move cursor to `Ps`-th row (default=1).\"\n   */\n  public linePosAbsolute(params: IParams): boolean {\n    this._setCursor(this._activeBuffer.x, (params.params[0] || 1) - 1);\n    return true;\n  }\n\n  /**\n   * CSI Pm e  Vertical Position Relative (VPR)\n   *   [rows] (default = [row+1,column])\n   * reuse CSI Ps B ?\n   *\n   * @vt: #Y CSI VPR   \"Vertical Position Relative\"    \"CSI Ps e\"  \"Move cursor `Ps` times down (default=1).\"\n   */\n  public vPositionRelative(params: IParams): boolean {\n    this._moveCursor(0, params.params[0] || 1);\n    return true;\n  }\n\n  /**\n   * CSI Ps ; Ps f\n   *   Horizontal and Vertical Position [row;column] (default =\n   *   [1,1]) (HVP).\n   *   Same as CUP.\n   *\n   * @vt: #Y CSI HVP   \"Horizontal and Vertical Position\" \"CSI Ps ; Ps f\"  \"Same as CUP.\"\n   */\n  public hVPosition(params: IParams): boolean {\n    this.cursorPosition(params);\n    return true;\n  }\n\n  /**\n   * CSI Ps g  Tab Clear (TBC).\n   *     Ps = 0  -> Clear Current Column (default).\n   *     Ps = 3  -> Clear All.\n   * Potentially:\n   *   Ps = 2  -> Clear Stops on Line.\n   *   http://vt100.net/annarbor/aaa-ug/section6.html\n   *\n   * @vt: #Y CSI TBC   \"Tab Clear\" \"CSI Ps g\"  \"Clear tab stops at current position (0) or all (3) (default=0).\"\n   * Clearing tabstops off the active row (Ps = 2, VT100) is currently not supported.\n   */\n  public tabClear(params: IParams): boolean {\n    const param = params.params[0];\n    if (param === 0) {\n      delete this._activeBuffer.tabs[this._activeBuffer.x];\n    } else if (param === 3) {\n      this._activeBuffer.tabs = {};\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps I\n   *   Cursor Forward Tabulation Ps tab stops (default = 1) (CHT).\n   *\n   * @vt: #Y CSI CHT   \"Cursor Horizontal Tabulation\" \"CSI Ps I\" \"Move cursor `Ps` times tabs forward (default=1).\"\n   */\n  public cursorForwardTab(params: IParams): boolean {\n    if (this._activeBuffer.x >= this._bufferService.cols) {\n      return true;\n    }\n    let param = params.params[0] || 1;\n    while (param--) {\n      this._activeBuffer.x = this._activeBuffer.nextStop();\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps Z  Cursor Backward Tabulation Ps tab stops (default = 1) (CBT).\n   *\n   * @vt: #Y CSI CBT   \"Cursor Backward Tabulation\"  \"CSI Ps Z\"  \"Move cursor `Ps` tabs backward (default=1).\"\n   */\n  public cursorBackwardTab(params: IParams): boolean {\n    if (this._activeBuffer.x >= this._bufferService.cols) {\n      return true;\n    }\n    let param = params.params[0] || 1;\n\n    while (param--) {\n      this._activeBuffer.x = this._activeBuffer.prevStop();\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps \" q  Select Character Protection Attribute (DECSCA).\n   *\n   * @vt: #Y CSI DECSCA   \"Select Character Protection Attribute\"  \"CSI Ps \" q\"  \"Whether DECSED and DECSEL can erase (0=default, 2) or not (1).\"\n   */\n  public selectProtected(params: IParams): boolean {\n    const p = params.params[0];\n    if (p === 1) this._curAttrData.bg |= BgFlags.PROTECTED;\n    if (p === 2 || p === 0) this._curAttrData.bg &= ~BgFlags.PROTECTED;\n    return true;\n  }\n\n\n  /**\n   * Helper method to erase cells in a terminal row.\n   * The cell gets replaced with the eraseChar of the terminal.\n   * @param y The row index relative to the viewport.\n   * @param start The start x index of the range to be erased.\n   * @param end The end x index of the range to be erased (exclusive).\n   * @param clearWrap clear the isWrapped flag\n   * @param respectProtect Whether to respect the protection attribute (DECSCA).\n   */\n  private _eraseInBufferLine(y: number, start: number, end: number, clearWrap: boolean = false, respectProtect: boolean = false): void {\n    const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + y)!;\n    line.replaceCells(\n      start,\n      end,\n      this._activeBuffer.getNullCell(this._eraseAttrData()),\n      respectProtect\n    );\n    if (clearWrap) {\n      line.isWrapped = false;\n    }\n  }\n\n  /**\n   * Helper method to reset cells in a terminal row. The cell gets replaced with the eraseChar of\n   * the terminal and the isWrapped property is set to false.\n   * @param y row index\n   */\n  private _resetBufferLine(y: number, respectProtect: boolean = false): void {\n    const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + y);\n    if (line) {\n      line.fill(this._activeBuffer.getNullCell(this._eraseAttrData()), respectProtect);\n      this._bufferService.buffer.clearMarkers(this._activeBuffer.ybase + y);\n      line.isWrapped = false;\n    }\n  }\n\n  /**\n   * CSI Ps J  Erase in Display (ED).\n   *     Ps = 0  -> Erase Below (default).\n   *     Ps = 1  -> Erase Above.\n   *     Ps = 2  -> Erase All.\n   *     Ps = 3  -> Erase Saved Lines (xterm).\n   * CSI ? Ps J\n   *   Erase in Display (DECSED).\n   *     Ps = 0  -> Selective Erase Below (default).\n   *     Ps = 1  -> Selective Erase Above.\n   *     Ps = 2  -> Selective Erase All.\n   *\n   * @vt: #Y CSI ED  \"Erase In Display\"  \"CSI Ps J\"  \"Erase various parts of the viewport.\"\n   * Supported param values:\n   *\n   * | Ps | Effect                                                       |\n   * | -- | ------------------------------------------------------------ |\n   * | 0  | Erase from the cursor through the end of the viewport.       |\n   * | 1  | Erase from the beginning of the viewport through the cursor. |\n   * | 2  | Erase complete viewport.                                     |\n   * | 3  | Erase scrollback.                                            |\n   *\n   * @vt: #Y CSI DECSED   \"Selective Erase In Display\"  \"CSI ? Ps J\"  \"Same as ED with respecting protection flag.\"\n   */\n  public eraseInDisplay(params: IParams, respectProtect: boolean = false): boolean {\n    this._restrictCursor(this._bufferService.cols);\n    let j;\n    switch (params.params[0]) {\n      case 0:\n        j = this._activeBuffer.y;\n        this._dirtyRowTracker.markDirty(j);\n        this._eraseInBufferLine(j++, this._activeBuffer.x, this._bufferService.cols, this._activeBuffer.x === 0, respectProtect);\n        for (; j < this._bufferService.rows; j++) {\n          this._resetBufferLine(j, respectProtect);\n        }\n        this._dirtyRowTracker.markDirty(j);\n        break;\n      case 1:\n        j = this._activeBuffer.y;\n        this._dirtyRowTracker.markDirty(j);\n        // Deleted front part of line and everything before. This line will no longer be wrapped.\n        this._eraseInBufferLine(j, 0, this._activeBuffer.x + 1, true, respectProtect);\n        if (this._activeBuffer.x + 1 >= this._bufferService.cols) {\n          // Deleted entire previous line. This next line can no longer be wrapped.\n          this._activeBuffer.lines.get(j + 1)!.isWrapped = false;\n        }\n        while (j--) {\n          this._resetBufferLine(j, respectProtect);\n        }\n        this._dirtyRowTracker.markDirty(0);\n        break;\n      case 2:\n        j = this._bufferService.rows;\n        this._dirtyRowTracker.markDirty(j - 1);\n        while (j--) {\n          this._resetBufferLine(j, respectProtect);\n        }\n        this._dirtyRowTracker.markDirty(0);\n        break;\n      case 3:\n        // Clear scrollback (everything not in viewport)\n        const scrollBackSize = this._activeBuffer.lines.length - this._bufferService.rows;\n        if (scrollBackSize > 0) {\n          this._activeBuffer.lines.trimStart(scrollBackSize);\n          this._activeBuffer.ybase = Math.max(this._activeBuffer.ybase - scrollBackSize, 0);\n          this._activeBuffer.ydisp = Math.max(this._activeBuffer.ydisp - scrollBackSize, 0);\n          // Force a scroll event to refresh viewport\n          this._onScroll.fire(0);\n        }\n        break;\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps K  Erase in Line (EL).\n   *     Ps = 0  -> Erase to Right (default).\n   *     Ps = 1  -> Erase to Left.\n   *     Ps = 2  -> Erase All.\n   * CSI ? Ps K\n   *   Erase in Line (DECSEL).\n   *     Ps = 0  -> Selective Erase to Right (default).\n   *     Ps = 1  -> Selective Erase to Left.\n   *     Ps = 2  -> Selective Erase All.\n   *\n   * @vt: #Y CSI EL    \"Erase In Line\"  \"CSI Ps K\"  \"Erase various parts of the active row.\"\n   * Supported param values:\n   *\n   * | Ps | Effect                                                   |\n   * | -- | -------------------------------------------------------- |\n   * | 0  | Erase from the cursor through the end of the row.        |\n   * | 1  | Erase from the beginning of the line through the cursor. |\n   * | 2  | Erase complete line.                                     |\n   *\n   * @vt: #Y CSI DECSEL   \"Selective Erase In Line\"  \"CSI ? Ps K\"  \"Same as EL with respecting protecting flag.\"\n   */\n  public eraseInLine(params: IParams, respectProtect: boolean = false): boolean {\n    this._restrictCursor(this._bufferService.cols);\n    switch (params.params[0]) {\n      case 0:\n        this._eraseInBufferLine(this._activeBuffer.y, this._activeBuffer.x, this._bufferService.cols, this._activeBuffer.x === 0, respectProtect);\n        break;\n      case 1:\n        this._eraseInBufferLine(this._activeBuffer.y, 0, this._activeBuffer.x + 1, false, respectProtect);\n        break;\n      case 2:\n        this._eraseInBufferLine(this._activeBuffer.y, 0, this._bufferService.cols, true, respectProtect);\n        break;\n    }\n    this._dirtyRowTracker.markDirty(this._activeBuffer.y);\n    return true;\n  }\n\n  /**\n   * CSI Ps L\n   * Insert Ps Line(s) (default = 1) (IL).\n   *\n   * @vt: #Y CSI IL  \"Insert Line\"   \"CSI Ps L\"  \"Insert `Ps` blank lines at active row (default=1).\"\n   * For every inserted line at the scroll top one line at the scroll bottom gets removed.\n   * The cursor is set to the first column.\n   * IL has no effect if the cursor is outside the scroll margins.\n   */\n  public insertLines(params: IParams): boolean {\n    this._restrictCursor();\n    let param = params.params[0] || 1;\n\n    if (this._activeBuffer.y > this._activeBuffer.scrollBottom || this._activeBuffer.y < this._activeBuffer.scrollTop) {\n      return true;\n    }\n\n    const row: number = this._activeBuffer.ybase + this._activeBuffer.y;\n\n    const scrollBottomRowsOffset = this._bufferService.rows - 1 - this._activeBuffer.scrollBottom;\n    const scrollBottomAbsolute = this._bufferService.rows - 1 + this._activeBuffer.ybase - scrollBottomRowsOffset + 1;\n    while (param--) {\n      // test: echo -e '\\e[44m\\e[1L\\e[0m'\n      // blankLine(true) - xterm/linux behavior\n      this._activeBuffer.lines.splice(scrollBottomAbsolute - 1, 1);\n      this._activeBuffer.lines.splice(row, 0, this._activeBuffer.getBlankLine(this._eraseAttrData()));\n    }\n\n    this._dirtyRowTracker.markRangeDirty(this._activeBuffer.y, this._activeBuffer.scrollBottom);\n    this._activeBuffer.x = 0; // see https://vt100.net/docs/vt220-rm/chapter4.html - vt220 only?\n    return true;\n  }\n\n  /**\n   * CSI Ps M\n   * Delete Ps Line(s) (default = 1) (DL).\n   *\n   * @vt: #Y CSI DL  \"Delete Line\"   \"CSI Ps M\"  \"Delete `Ps` lines at active row (default=1).\"\n   * For every deleted line at the scroll top one blank line at the scroll bottom gets appended.\n   * The cursor is set to the first column.\n   * DL has no effect if the cursor is outside the scroll margins.\n   */\n  public deleteLines(params: IParams): boolean {\n    this._restrictCursor();\n    let param = params.params[0] || 1;\n\n    if (this._activeBuffer.y > this._activeBuffer.scrollBottom || this._activeBuffer.y < this._activeBuffer.scrollTop) {\n      return true;\n    }\n\n    const row: number = this._activeBuffer.ybase + this._activeBuffer.y;\n\n    let j: number;\n    j = this._bufferService.rows - 1 - this._activeBuffer.scrollBottom;\n    j = this._bufferService.rows - 1 + this._activeBuffer.ybase - j;\n    while (param--) {\n      // test: echo -e '\\e[44m\\e[1M\\e[0m'\n      // blankLine(true) - xterm/linux behavior\n      this._activeBuffer.lines.splice(row, 1);\n      this._activeBuffer.lines.splice(j, 0, this._activeBuffer.getBlankLine(this._eraseAttrData()));\n    }\n\n    this._dirtyRowTracker.markRangeDirty(this._activeBuffer.y, this._activeBuffer.scrollBottom);\n    this._activeBuffer.x = 0; // see https://vt100.net/docs/vt220-rm/chapter4.html - vt220 only?\n    return true;\n  }\n\n  /**\n   * CSI Ps @\n   * Insert Ps (Blank) Character(s) (default = 1) (ICH).\n   *\n   * @vt: #Y CSI ICH  \"Insert Characters\"   \"CSI Ps @\"  \"Insert `Ps` (blank) characters (default = 1).\"\n   * The ICH sequence inserts `Ps` blank characters. The cursor remains at the beginning of the\n   * blank characters. Text between the cursor and right margin moves to the right. Characters moved\n   * past the right margin are lost.\n   *\n   *\n   * FIXME: check against xterm - should not work outside of scroll margins (see VT520 manual)\n   */\n  public insertChars(params: IParams): boolean {\n    this._restrictCursor();\n    const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y);\n    if (line) {\n      line.insertCells(\n        this._activeBuffer.x,\n        params.params[0] || 1,\n        this._activeBuffer.getNullCell(this._eraseAttrData())\n      );\n      this._dirtyRowTracker.markDirty(this._activeBuffer.y);\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps P\n   * Delete Ps Character(s) (default = 1) (DCH).\n   *\n   * @vt: #Y CSI DCH   \"Delete Character\"  \"CSI Ps P\"  \"Delete `Ps` characters (default=1).\"\n   * As characters are deleted, the remaining characters between the cursor and right margin move to\n   * the left. Character attributes move with the characters. The terminal adds blank characters at\n   * the right margin.\n   *\n   *\n   * FIXME: check against xterm - should not work outside of scroll margins (see VT520 manual)\n   */\n  public deleteChars(params: IParams): boolean {\n    this._restrictCursor();\n    const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y);\n    if (line) {\n      line.deleteCells(\n        this._activeBuffer.x,\n        params.params[0] || 1,\n        this._activeBuffer.getNullCell(this._eraseAttrData())\n      );\n      this._dirtyRowTracker.markDirty(this._activeBuffer.y);\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps S  Scroll up Ps lines (default = 1) (SU).\n   *\n   * @vt: #Y CSI SU  \"Scroll Up\"   \"CSI Ps S\"  \"Scroll `Ps` lines up (default=1).\"\n   *\n   *\n   * FIXME: scrolled out lines at top = 1 should add to scrollback (xterm)\n   */\n  public scrollUp(params: IParams): boolean {\n    let param = params.params[0] || 1;\n\n    while (param--) {\n      this._activeBuffer.lines.splice(this._activeBuffer.ybase + this._activeBuffer.scrollTop, 1);\n      this._activeBuffer.lines.splice(this._activeBuffer.ybase + this._activeBuffer.scrollBottom, 0, this._activeBuffer.getBlankLine(this._eraseAttrData()));\n    }\n    this._dirtyRowTracker.markRangeDirty(this._activeBuffer.scrollTop, this._activeBuffer.scrollBottom);\n    return true;\n  }\n\n  /**\n   * CSI Ps T  Scroll down Ps lines (default = 1) (SD).\n   *\n   * @vt: #Y CSI SD  \"Scroll Down\"   \"CSI Ps T\"  \"Scroll `Ps` lines down (default=1).\"\n   */\n  public scrollDown(params: IParams): boolean {\n    let param = params.params[0] || 1;\n\n    while (param--) {\n      this._activeBuffer.lines.splice(this._activeBuffer.ybase + this._activeBuffer.scrollBottom, 1);\n      this._activeBuffer.lines.splice(this._activeBuffer.ybase + this._activeBuffer.scrollTop, 0, this._activeBuffer.getBlankLine(DEFAULT_ATTR_DATA));\n    }\n    this._dirtyRowTracker.markRangeDirty(this._activeBuffer.scrollTop, this._activeBuffer.scrollBottom);\n    return true;\n  }\n\n  /**\n   * CSI Ps SP @  Scroll left Ps columns (default = 1) (SL) ECMA-48\n   *\n   * Notation: (Pn)\n   * Representation: CSI Pn 02/00 04/00\n   * Parameter default value: Pn = 1\n   * SL causes the data in the presentation component to be moved by n character positions\n   * if the line orientation is horizontal, or by n line positions if the line orientation\n   * is vertical, such that the data appear to move to the left; where n equals the value of Pn.\n   * The active presentation position is not affected by this control function.\n   *\n   * Supported:\n   *   - always left shift (no line orientation setting respected)\n   *\n   * @vt: #Y CSI SL  \"Scroll Left\" \"CSI Ps SP @\" \"Scroll viewport `Ps` times to the left.\"\n   * SL moves the content of all lines within the scroll margins `Ps` times to the left.\n   * SL has no effect outside of the scroll margins.\n   */\n  public scrollLeft(params: IParams): boolean {\n    if (this._activeBuffer.y > this._activeBuffer.scrollBottom || this._activeBuffer.y < this._activeBuffer.scrollTop) {\n      return true;\n    }\n    const param = params.params[0] || 1;\n    for (let y = this._activeBuffer.scrollTop; y <= this._activeBuffer.scrollBottom; ++y) {\n      const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + y)!;\n      line.deleteCells(0, param, this._activeBuffer.getNullCell(this._eraseAttrData()));\n      line.isWrapped = false;\n    }\n    this._dirtyRowTracker.markRangeDirty(this._activeBuffer.scrollTop, this._activeBuffer.scrollBottom);\n    return true;\n  }\n\n  /**\n   * CSI Ps SP A  Scroll right Ps columns (default = 1) (SR) ECMA-48\n   *\n   * Notation: (Pn)\n   * Representation: CSI Pn 02/00 04/01\n   * Parameter default value: Pn = 1\n   * SR causes the data in the presentation component to be moved by n character positions\n   * if the line orientation is horizontal, or by n line positions if the line orientation\n   * is vertical, such that the data appear to move to the right; where n equals the value of Pn.\n   * The active presentation position is not affected by this control function.\n   *\n   * Supported:\n   *   - always right shift (no line orientation setting respected)\n   *\n   * @vt: #Y CSI SR  \"Scroll Right\"  \"CSI Ps SP A\"   \"Scroll viewport `Ps` times to the right.\"\n   * SL moves the content of all lines within the scroll margins `Ps` times to the right.\n   * Content at the right margin is lost.\n   * SL has no effect outside of the scroll margins.\n   */\n  public scrollRight(params: IParams): boolean {\n    if (this._activeBuffer.y > this._activeBuffer.scrollBottom || this._activeBuffer.y < this._activeBuffer.scrollTop) {\n      return true;\n    }\n    const param = params.params[0] || 1;\n    for (let y = this._activeBuffer.scrollTop; y <= this._activeBuffer.scrollBottom; ++y) {\n      const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + y)!;\n      line.insertCells(0, param, this._activeBuffer.getNullCell(this._eraseAttrData()));\n      line.isWrapped = false;\n    }\n    this._dirtyRowTracker.markRangeDirty(this._activeBuffer.scrollTop, this._activeBuffer.scrollBottom);\n    return true;\n  }\n\n  /**\n   * CSI Pm ' }\n   * Insert Ps Column(s) (default = 1) (DECIC), VT420 and up.\n   *\n   * @vt: #Y CSI DECIC \"Insert Columns\"  \"CSI Ps ' }\"  \"Insert `Ps` columns at cursor position.\"\n   * DECIC inserts `Ps` times blank columns at the cursor position for all lines with the scroll\n   * margins, moving content to the right. Content at the right margin is lost. DECIC has no effect\n   * outside the scrolling margins.\n   */\n  public insertColumns(params: IParams): boolean {\n    if (this._activeBuffer.y > this._activeBuffer.scrollBottom || this._activeBuffer.y < this._activeBuffer.scrollTop) {\n      return true;\n    }\n    const param = params.params[0] || 1;\n    for (let y = this._activeBuffer.scrollTop; y <= this._activeBuffer.scrollBottom; ++y) {\n      const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + y)!;\n      line.insertCells(this._activeBuffer.x, param, this._activeBuffer.getNullCell(this._eraseAttrData()));\n      line.isWrapped = false;\n    }\n    this._dirtyRowTracker.markRangeDirty(this._activeBuffer.scrollTop, this._activeBuffer.scrollBottom);\n    return true;\n  }\n\n  /**\n   * CSI Pm ' ~\n   * Delete Ps Column(s) (default = 1) (DECDC), VT420 and up.\n   *\n   * @vt: #Y CSI DECDC \"Delete Columns\"  \"CSI Ps ' ~\"  \"Delete `Ps` columns at cursor position.\"\n   * DECDC deletes `Ps` times columns at the cursor position for all lines with the scroll margins,\n   * moving content to the left. Blank columns are added at the right margin.\n   * DECDC has no effect outside the scrolling margins.\n   */\n  public deleteColumns(params: IParams): boolean {\n    if (this._activeBuffer.y > this._activeBuffer.scrollBottom || this._activeBuffer.y < this._activeBuffer.scrollTop) {\n      return true;\n    }\n    const param = params.params[0] || 1;\n    for (let y = this._activeBuffer.scrollTop; y <= this._activeBuffer.scrollBottom; ++y) {\n      const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + y)!;\n      line.deleteCells(this._activeBuffer.x, param, this._activeBuffer.getNullCell(this._eraseAttrData()));\n      line.isWrapped = false;\n    }\n    this._dirtyRowTracker.markRangeDirty(this._activeBuffer.scrollTop, this._activeBuffer.scrollBottom);\n    return true;\n  }\n\n  /**\n   * CSI Ps X\n   * Erase Ps Character(s) (default = 1) (ECH).\n   *\n   * @vt: #Y CSI ECH   \"Erase Character\"   \"CSI Ps X\"  \"Erase `Ps` characters from current cursor position to the right (default=1).\"\n   * ED erases `Ps` characters from current cursor position to the right.\n   * ED works inside or outside the scrolling margins.\n   */\n  public eraseChars(params: IParams): boolean {\n    this._restrictCursor();\n    const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y);\n    if (line) {\n      line.replaceCells(\n        this._activeBuffer.x,\n        this._activeBuffer.x + (params.params[0] || 1),\n        this._activeBuffer.getNullCell(this._eraseAttrData())\n      );\n      this._dirtyRowTracker.markDirty(this._activeBuffer.y);\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps b  Repeat the preceding graphic character Ps times (REP).\n   * From ECMA 48 (@see http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf)\n   *    Notation: (Pn)\n   *    Representation: CSI Pn 06/02\n   *    Parameter default value: Pn = 1\n   *    REP is used to indicate that the preceding character in the data stream,\n   *    if it is a graphic character (represented by one or more bit combinations) including SPACE,\n   *    is to be repeated n times, where n equals the value of Pn.\n   *    If the character preceding REP is a control function or part of a control function,\n   *    the effect of REP is not defined by this Standard.\n   *\n   * We extend xterm's behavior to allow repeating entire grapheme clusters.\n   * This isn't 100% xterm-compatible, but it seems saner and more useful.\n   *    - text attrs are applied normally\n   *    - wrap around is respected\n   *    - any valid sequence resets the carried forward char\n   *\n   * Note: To get reset on a valid sequence working correctly without much runtime penalty, the\n   * preceding codepoint is stored on the parser in `this.print` and reset during `parser.parse`.\n   *\n   * @vt: #Y CSI REP   \"Repeat Preceding Character\"    \"CSI Ps b\"  \"Repeat preceding character `Ps` times (default=1).\"\n   * REP repeats the previous character `Ps` times advancing the cursor, also wrapping if DECAWM is\n   * set. REP has no effect if the sequence does not follow a printable ASCII character\n   * (NOOP for any other sequence in between or NON ASCII characters).\n   */\n  public repeatPrecedingCharacter(params: IParams): boolean {\n    const joinState = this._parser.precedingJoinState;\n    if (!joinState) {\n      return true;\n    }\n    // call print to insert the chars and handle correct wrapping\n    const length = params.params[0] || 1;\n    const chWidth = UnicodeService.extractWidth(joinState);\n    const x = this._activeBuffer.x - chWidth;\n    const bufferRow = this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y)!;\n    const text = bufferRow.getString(x);\n    const data = new Uint32Array(text.length * length);\n    let idata = 0;\n    for (let itext = 0; itext < text.length; ) {\n      const ch = text.codePointAt(itext) || 0;\n      data[idata++] = ch;\n      itext += ch > 0xffff ? 2 : 1;\n    }\n    let tlength = idata;\n    for (let i = 1; i < length; ++i) {\n      data.copyWithin(tlength, 0, idata);\n      tlength += idata;\n    }\n    this.print(data, 0, tlength);\n    return true;\n  }\n\n  /**\n   * CSI Ps c  Send Device Attributes (Primary DA).\n   *     Ps = 0  or omitted -> request attributes from terminal.  The\n   *     response depends on the decTerminalID resource setting.\n   *     -> CSI ? 1 ; 2 c  (``VT100 with Advanced Video Option'')\n   *     -> CSI ? 1 ; 0 c  (``VT101 with No Options'')\n   *     -> CSI ? 6 c  (``VT102'')\n   *     -> CSI ? 6 0 ; 1 ; 2 ; 6 ; 8 ; 9 ; 1 5 ; c  (``VT220'')\n   *   The VT100-style response parameters do not mean anything by\n   *   themselves.  VT220 parameters do, telling the host what fea-\n   *   tures the terminal supports:\n   *     Ps = 1  -> 132-columns.\n   *     Ps = 2  -> Printer.\n   *     Ps = 6  -> Selective erase.\n   *     Ps = 8  -> User-defined keys.\n   *     Ps = 9  -> National replacement character sets.\n   *     Ps = 1 5  -> Technical characters.\n   *     Ps = 2 2  -> ANSI color, e.g., VT525.\n   *     Ps = 2 9  -> ANSI text locator (i.e., DEC Locator mode).\n   *\n   * @vt: #Y CSI DA1   \"Primary Device Attributes\"     \"CSI c\"  \"Send primary device attributes.\"\n   *\n   *\n   * TODO: fix and cleanup response\n   */\n  public sendDeviceAttributesPrimary(params: IParams): boolean {\n    if (params.params[0] > 0) {\n      return true;\n    }\n    if (this._is('xterm') || this._is('rxvt-unicode') || this._is('screen')) {\n      this._coreService.triggerDataEvent(C0.ESC + '[?1;2c');\n    } else if (this._is('linux')) {\n      this._coreService.triggerDataEvent(C0.ESC + '[?6c');\n    }\n    return true;\n  }\n\n  /**\n   * CSI > Ps c\n   *   Send Device Attributes (Secondary DA).\n   *     Ps = 0  or omitted -> request the terminal's identification\n   *     code.  The response depends on the decTerminalID resource set-\n   *     ting.  It should apply only to VT220 and up, but xterm extends\n   *     this to VT100.\n   *     -> CSI  > Pp ; Pv ; Pc c\n   *   where Pp denotes the terminal type\n   *     Pp = 0  -> ``VT100''.\n   *     Pp = 1  -> ``VT220''.\n   *   and Pv is the firmware version (for xterm, this was originally\n   *   the XFree86 patch number, starting with 95).  In a DEC termi-\n   *   nal, Pc indicates the ROM cartridge registration number and is\n   *   always zero.\n   * More information:\n   *   xterm/charproc.c - line 2012, for more information.\n   *   vim responds with ^[[?0c or ^[[?1c after the terminal's response (?)\n   *\n   * @vt: #Y CSI DA2   \"Secondary Device Attributes\"   \"CSI > c\" \"Send primary device attributes.\"\n   *\n   *\n   * TODO: fix and cleanup response\n   */\n  public sendDeviceAttributesSecondary(params: IParams): boolean {\n    if (params.params[0] > 0) {\n      return true;\n    }\n    // xterm and urxvt\n    // seem to spit this\n    // out around ~370 times (?).\n    if (this._is('xterm')) {\n      this._coreService.triggerDataEvent(C0.ESC + '[>0;276;0c');\n    } else if (this._is('rxvt-unicode')) {\n      this._coreService.triggerDataEvent(C0.ESC + '[>85;95;0c');\n    } else if (this._is('linux')) {\n      // not supported by linux console.\n      // linux console echoes parameters.\n      this._coreService.triggerDataEvent(params.params[0] + 'c');\n    } else if (this._is('screen')) {\n      this._coreService.triggerDataEvent(C0.ESC + '[>83;40003;0c');\n    }\n    return true;\n  }\n\n  /**\n   * Evaluate if the current terminal is the given argument.\n   * @param term The terminal name to evaluate\n   */\n  private _is(term: string): boolean {\n    return (this._optionsService.rawOptions.termName + '').indexOf(term) === 0;\n  }\n\n  /**\n   * CSI Pm h  Set Mode (SM).\n   *     Ps = 2  -> Keyboard Action Mode (AM).\n   *     Ps = 4  -> Insert Mode (IRM).\n   *     Ps = 1 2  -> Send/receive (SRM).\n   *     Ps = 2 0  -> Automatic Newline (LNM).\n   *\n   * @vt: #P[Only IRM is supported.]    CSI SM    \"Set Mode\"  \"CSI Pm h\"  \"Set various terminal modes.\"\n   * Supported param values by SM:\n   *\n   * | Param | Action                                 | Support |\n   * | ----- | -------------------------------------- | ------- |\n   * | 2     | Keyboard Action Mode (KAM). Always on. | #N      |\n   * | 4     | Insert Mode (IRM).                     | #Y      |\n   * | 12    | Send/receive (SRM). Always off.        | #N      |\n   * | 20    | Automatic Newline (LNM).               | #Y      |\n   */\n  public setMode(params: IParams): boolean {\n    for (let i = 0; i < params.length; i++) {\n      switch (params.params[i]) {\n        case 4:\n          this._coreService.modes.insertMode = true;\n          break;\n        case 20:\n          this._optionsService.options.convertEol = true;\n          break;\n      }\n    }\n    return true;\n  }\n\n  /**\n   * CSI ? Pm h\n   *   DEC Private Mode Set (DECSET).\n   *     Ps = 1  -> Application Cursor Keys (DECCKM).\n   *     Ps = 2  -> Designate USASCII for character sets G0-G3\n   *     (DECANM), and set VT100 mode.\n   *     Ps = 3  -> 132 Column Mode (DECCOLM).\n   *     Ps = 4  -> Smooth (Slow) Scroll (DECSCLM).\n   *     Ps = 5  -> Reverse Video (DECSCNM).\n   *     Ps = 6  -> Origin Mode (DECOM).\n   *     Ps = 7  -> Wraparound Mode (DECAWM).\n   *     Ps = 8  -> Auto-repeat Keys (DECARM).\n   *     Ps = 9  -> Send Mouse X & Y on button press.  See the sec-\n   *     tion Mouse Tracking.\n   *     Ps = 1 0  -> Show toolbar (rxvt).\n   *     Ps = 1 2  -> Start Blinking Cursor (att610).\n   *     Ps = 1 8  -> Print form feed (DECPFF).\n   *     Ps = 1 9  -> Set print extent to full screen (DECPEX).\n   *     Ps = 2 5  -> Show Cursor (DECTCEM).\n   *     Ps = 3 0  -> Show scrollbar (rxvt).\n   *     Ps = 3 5  -> Enable font-shifting functions (rxvt).\n   *     Ps = 3 8  -> Enter Tektronix Mode (DECTEK).\n   *     Ps = 4 0  -> Allow 80 -> 132 Mode.\n   *     Ps = 4 1  -> more(1) fix (see curses resource).\n   *     Ps = 4 2  -> Enable Nation Replacement Character sets (DECN-\n   *     RCM).\n   *     Ps = 4 4  -> Turn On Margin Bell.\n   *     Ps = 4 5  -> Reverse-wraparound Mode.\n   *     Ps = 4 6  -> Start Logging.  This is normally disabled by a\n   *     compile-time option.\n   *     Ps = 4 7  -> Use Alternate Screen Buffer.  (This may be dis-\n   *     abled by the titeInhibit resource).\n   *     Ps = 6 6  -> Application keypad (DECNKM).\n   *     Ps = 6 7  -> Backarrow key sends backspace (DECBKM).\n   *     Ps = 1 0 0 0  -> Send Mouse X & Y on button press and\n   *     release.  See the section Mouse Tracking.\n   *     Ps = 1 0 0 1  -> Use Hilite Mouse Tracking.\n   *     Ps = 1 0 0 2  -> Use Cell Motion Mouse Tracking.\n   *     Ps = 1 0 0 3  -> Use All Motion Mouse Tracking.\n   *     Ps = 1 0 0 4  -> Send FocusIn/FocusOut events.\n   *     Ps = 1 0 0 5  -> Enable Extended Mouse Mode.\n   *     Ps = 1 0 1 0  -> Scroll to bottom on tty output (rxvt).\n   *     Ps = 1 0 1 1  -> Scroll to bottom on key press (rxvt).\n   *     Ps = 1 0 3 4  -> Interpret \"meta\" key, sets eighth bit.\n   *     (enables the eightBitInput resource).\n   *     Ps = 1 0 3 5  -> Enable special modifiers for Alt and Num-\n   *     Lock keys.  (This enables the numLock resource).\n   *     Ps = 1 0 3 6  -> Send ESC   when Meta modifies a key.  (This\n   *     enables the metaSendsEscape resource).\n   *     Ps = 1 0 3 7  -> Send DEL from the editing-keypad Delete\n   *     key.\n   *     Ps = 1 0 3 9  -> Send ESC  when Alt modifies a key.  (This\n   *     enables the altSendsEscape resource).\n   *     Ps = 1 0 4 0  -> Keep selection even if not highlighted.\n   *     (This enables the keepSelection resource).\n   *     Ps = 1 0 4 1  -> Use the CLIPBOARD selection.  (This enables\n   *     the selectToClipboard resource).\n   *     Ps = 1 0 4 2  -> Enable Urgency window manager hint when\n   *     Control-G is received.  (This enables the bellIsUrgent\n   *     resource).\n   *     Ps = 1 0 4 3  -> Enable raising of the window when Control-G\n   *     is received.  (enables the popOnBell resource).\n   *     Ps = 1 0 4 7  -> Use Alternate Screen Buffer.  (This may be\n   *     disabled by the titeInhibit resource).\n   *     Ps = 1 0 4 8  -> Save cursor as in DECSC.  (This may be dis-\n   *     abled by the titeInhibit resource).\n   *     Ps = 1 0 4 9  -> Save cursor as in DECSC and use Alternate\n   *     Screen Buffer, clearing it first.  (This may be disabled by\n   *     the titeInhibit resource).  This combines the effects of the 1\n   *     0 4 7  and 1 0 4 8  modes.  Use this with terminfo-based\n   *     applications rather than the 4 7  mode.\n   *     Ps = 1 0 5 0  -> Set terminfo/termcap function-key mode.\n   *     Ps = 1 0 5 1  -> Set Sun function-key mode.\n   *     Ps = 1 0 5 2  -> Set HP function-key mode.\n   *     Ps = 1 0 5 3  -> Set SCO function-key mode.\n   *     Ps = 1 0 6 0  -> Set legacy keyboard emulation (X11R6).\n   *     Ps = 1 0 6 1  -> Set VT220 keyboard emulation.\n   *     Ps = 2 0 0 4  -> Set bracketed paste mode.\n   * Modes:\n   *   http: *vt100.net/docs/vt220-rm/chapter4.html\n   *\n   * @vt: #P[See below for supported modes.]    CSI DECSET  \"DEC Private Set Mode\" \"CSI ? Pm h\"  \"Set various terminal attributes.\"\n   * Supported param values by DECSET:\n   *\n   * | param | Action                                                  | Support |\n   * | ----- | ------------------------------------------------------- | --------|\n   * | 1     | Application Cursor Keys (DECCKM).                       | #Y      |\n   * | 2     | Designate US-ASCII for character sets G0-G3 (DECANM).   | #Y      |\n   * | 3     | 132 Column Mode (DECCOLM).                              | #Y      |\n   * | 6     | Origin Mode (DECOM).                                    | #Y      |\n   * | 7     | Auto-wrap Mode (DECAWM).                                | #Y      |\n   * | 8     | Auto-repeat Keys (DECARM). Always on.                   | #N      |\n   * | 9     | X10 xterm mouse protocol.                               | #Y      |\n   * | 12    | Start Blinking Cursor.                                  | #Y      |\n   * | 25    | Show Cursor (DECTCEM).                                  | #Y      |\n   * | 45    | Reverse wrap-around.                                    | #Y      |\n   * | 47    | Use Alternate Screen Buffer.                            | #Y      |\n   * | 66    | Application keypad (DECNKM).                            | #Y      |\n   * | 1000  | X11 xterm mouse protocol.                               | #Y      |\n   * | 1002  | Use Cell Motion Mouse Tracking.                         | #Y      |\n   * | 1003  | Use All Motion Mouse Tracking.                          | #Y      |\n   * | 1004  | Send FocusIn/FocusOut events                            | #Y      |\n   * | 1005  | Enable UTF-8 Mouse Mode.                                | #N      |\n   * | 1006  | Enable SGR Mouse Mode.                                  | #Y      |\n   * | 1015  | Enable urxvt Mouse Mode.                                | #N      |\n   * | 1016  | Enable SGR-Pixels Mouse Mode.                           | #Y      |\n   * | 1047  | Use Alternate Screen Buffer.                            | #Y      |\n   * | 1048  | Save cursor as in DECSC.                                | #Y      |\n   * | 1049  | Save cursor and switch to alternate buffer clearing it. | #P[Does not clear the alternate buffer.] |\n   * | 2004  | Set bracketed paste mode.                               | #Y      |\n   *\n   *\n   * FIXME: implement DECSCNM, 1049 should clear altbuffer\n   */\n  public setModePrivate(params: IParams): boolean {\n    for (let i = 0; i < params.length; i++) {\n      switch (params.params[i]) {\n        case 1:\n          this._coreService.decPrivateModes.applicationCursorKeys = true;\n          break;\n        case 2:\n          this._charsetService.setgCharset(0, DEFAULT_CHARSET);\n          this._charsetService.setgCharset(1, DEFAULT_CHARSET);\n          this._charsetService.setgCharset(2, DEFAULT_CHARSET);\n          this._charsetService.setgCharset(3, DEFAULT_CHARSET);\n          // set VT100 mode here\n          break;\n        case 3:\n          /**\n           * DECCOLM - 132 column mode.\n           * This is only active if 'SetWinLines' (24) is enabled\n           * through `options.windowsOptions`.\n           */\n          if (this._optionsService.rawOptions.windowOptions.setWinLines) {\n            this._bufferService.resize(132, this._bufferService.rows);\n            this._onRequestReset.fire();\n          }\n          break;\n        case 6:\n          this._coreService.decPrivateModes.origin = true;\n          this._setCursor(0, 0);\n          break;\n        case 7:\n          this._coreService.decPrivateModes.wraparound = true;\n          break;\n        case 12:\n          this._optionsService.options.cursorBlink = true;\n          break;\n        case 45:\n          this._coreService.decPrivateModes.reverseWraparound = true;\n          break;\n        case 66:\n          this._logService.debug('Serial port requested application keypad.');\n          this._coreService.decPrivateModes.applicationKeypad = true;\n          this._onRequestSyncScrollBar.fire();\n          break;\n        case 9: // X10 Mouse\n          // no release, no motion, no wheel, no modifiers.\n          this._coreMouseService.activeProtocol = 'X10';\n          break;\n        case 1000: // vt200 mouse\n          // no motion.\n          this._coreMouseService.activeProtocol = 'VT200';\n          break;\n        case 1002: // button event mouse\n          this._coreMouseService.activeProtocol = 'DRAG';\n          break;\n        case 1003: // any event mouse\n          // any event - sends motion events,\n          // even if there is no button held down.\n          this._coreMouseService.activeProtocol = 'ANY';\n          break;\n        case 1004: // send focusin/focusout events\n          // focusin: ^[[I\n          // focusout: ^[[O\n          this._coreService.decPrivateModes.sendFocus = true;\n          this._onRequestSendFocus.fire();\n          break;\n        case 1005: // utf8 ext mode mouse - removed in #2507\n          this._logService.debug('DECSET 1005 not supported (see #2507)');\n          break;\n        case 1006: // sgr ext mode mouse\n          this._coreMouseService.activeEncoding = 'SGR';\n          break;\n        case 1015: // urxvt ext mode mouse - removed in #2507\n          this._logService.debug('DECSET 1015 not supported (see #2507)');\n          break;\n        case 1016: // sgr pixels mode mouse\n          this._coreMouseService.activeEncoding = 'SGR_PIXELS';\n          break;\n        case 25: // show cursor\n          this._coreService.isCursorHidden = false;\n          break;\n        case 1048: // alt screen cursor\n          this.saveCursor();\n          break;\n        case 1049: // alt screen buffer cursor\n          this.saveCursor();\n        // FALL-THROUGH\n        case 47: // alt screen buffer\n        case 1047: // alt screen buffer\n          this._bufferService.buffers.activateAltBuffer(this._eraseAttrData());\n          this._coreService.isCursorInitialized = true;\n          this._onRequestRefreshRows.fire(undefined);\n          this._onRequestSyncScrollBar.fire();\n          break;\n        case 2004: // bracketed paste mode (https://cirw.in/blog/bracketed-paste)\n          this._coreService.decPrivateModes.bracketedPasteMode = true;\n          break;\n      }\n    }\n    return true;\n  }\n\n\n  /**\n   * CSI Pm l  Reset Mode (RM).\n   *     Ps = 2  -> Keyboard Action Mode (AM).\n   *     Ps = 4  -> Replace Mode (IRM).\n   *     Ps = 1 2  -> Send/receive (SRM).\n   *     Ps = 2 0  -> Normal Linefeed (LNM).\n   *\n   * @vt: #P[Only IRM is supported.]    CSI RM    \"Reset Mode\"  \"CSI Pm l\"  \"Set various terminal attributes.\"\n   * Supported param values by RM:\n   *\n   * | Param | Action                                 | Support |\n   * | ----- | -------------------------------------- | ------- |\n   * | 2     | Keyboard Action Mode (KAM). Always on. | #N      |\n   * | 4     | Replace Mode (IRM). (default)          | #Y      |\n   * | 12    | Send/receive (SRM). Always off.        | #N      |\n   * | 20    | Normal Linefeed (LNM).                 | #Y      |\n   *\n   *\n   * FIXME: why is LNM commented out?\n   */\n  public resetMode(params: IParams): boolean {\n    for (let i = 0; i < params.length; i++) {\n      switch (params.params[i]) {\n        case 4:\n          this._coreService.modes.insertMode = false;\n          break;\n        case 20:\n          this._optionsService.options.convertEol = false;\n          break;\n      }\n    }\n    return true;\n  }\n\n  /**\n   * CSI ? Pm l\n   *   DEC Private Mode Reset (DECRST).\n   *     Ps = 1  -> Normal Cursor Keys (DECCKM).\n   *     Ps = 2  -> Designate VT52 mode (DECANM).\n   *     Ps = 3  -> 80 Column Mode (DECCOLM).\n   *     Ps = 4  -> Jump (Fast) Scroll (DECSCLM).\n   *     Ps = 5  -> Normal Video (DECSCNM).\n   *     Ps = 6  -> Normal Cursor Mode (DECOM).\n   *     Ps = 7  -> No Wraparound Mode (DECAWM).\n   *     Ps = 8  -> No Auto-repeat Keys (DECARM).\n   *     Ps = 9  -> Don't send Mouse X & Y on button press.\n   *     Ps = 1 0  -> Hide toolbar (rxvt).\n   *     Ps = 1 2  -> Stop Blinking Cursor (att610).\n   *     Ps = 1 8  -> Don't print form feed (DECPFF).\n   *     Ps = 1 9  -> Limit print to scrolling region (DECPEX).\n   *     Ps = 2 5  -> Hide Cursor (DECTCEM).\n   *     Ps = 3 0  -> Don't show scrollbar (rxvt).\n   *     Ps = 3 5  -> Disable font-shifting functions (rxvt).\n   *     Ps = 4 0  -> Disallow 80 -> 132 Mode.\n   *     Ps = 4 1  -> No more(1) fix (see curses resource).\n   *     Ps = 4 2  -> Disable Nation Replacement Character sets (DEC-\n   *     NRCM).\n   *     Ps = 4 4  -> Turn Off Margin Bell.\n   *     Ps = 4 5  -> No Reverse-wraparound Mode.\n   *     Ps = 4 6  -> Stop Logging.  (This is normally disabled by a\n   *     compile-time option).\n   *     Ps = 4 7  -> Use Normal Screen Buffer.\n   *     Ps = 6 6  -> Numeric keypad (DECNKM).\n   *     Ps = 6 7  -> Backarrow key sends delete (DECBKM).\n   *     Ps = 1 0 0 0  -> Don't send Mouse X & Y on button press and\n   *     release.  See the section Mouse Tracking.\n   *     Ps = 1 0 0 1  -> Don't use Hilite Mouse Tracking.\n   *     Ps = 1 0 0 2  -> Don't use Cell Motion Mouse Tracking.\n   *     Ps = 1 0 0 3  -> Don't use All Motion Mouse Tracking.\n   *     Ps = 1 0 0 4  -> Don't send FocusIn/FocusOut events.\n   *     Ps = 1 0 0 5  -> Disable Extended Mouse Mode.\n   *     Ps = 1 0 1 0  -> Don't scroll to bottom on tty output\n   *     (rxvt).\n   *     Ps = 1 0 1 1  -> Don't scroll to bottom on key press (rxvt).\n   *     Ps = 1 0 3 4  -> Don't interpret \"meta\" key.  (This disables\n   *     the eightBitInput resource).\n   *     Ps = 1 0 3 5  -> Disable special modifiers for Alt and Num-\n   *     Lock keys.  (This disables the numLock resource).\n   *     Ps = 1 0 3 6  -> Don't send ESC  when Meta modifies a key.\n   *     (This disables the metaSendsEscape resource).\n   *     Ps = 1 0 3 7  -> Send VT220 Remove from the editing-keypad\n   *     Delete key.\n   *     Ps = 1 0 3 9  -> Don't send ESC  when Alt modifies a key.\n   *     (This disables the altSendsEscape resource).\n   *     Ps = 1 0 4 0  -> Do not keep selection when not highlighted.\n   *     (This disables the keepSelection resource).\n   *     Ps = 1 0 4 1  -> Use the PRIMARY selection.  (This disables\n   *     the selectToClipboard resource).\n   *     Ps = 1 0 4 2  -> Disable Urgency window manager hint when\n   *     Control-G is received.  (This disables the bellIsUrgent\n   *     resource).\n   *     Ps = 1 0 4 3  -> Disable raising of the window when Control-\n   *     G is received.  (This disables the popOnBell resource).\n   *     Ps = 1 0 4 7  -> Use Normal Screen Buffer, clearing screen\n   *     first if in the Alternate Screen.  (This may be disabled by\n   *     the titeInhibit resource).\n   *     Ps = 1 0 4 8  -> Restore cursor as in DECRC.  (This may be\n   *     disabled by the titeInhibit resource).\n   *     Ps = 1 0 4 9  -> Use Normal Screen Buffer and restore cursor\n   *     as in DECRC.  (This may be disabled by the titeInhibit\n   *     resource).  This combines the effects of the 1 0 4 7  and 1 0\n   *     4 8  modes.  Use this with terminfo-based applications rather\n   *     than the 4 7  mode.\n   *     Ps = 1 0 5 0  -> Reset terminfo/termcap function-key mode.\n   *     Ps = 1 0 5 1  -> Reset Sun function-key mode.\n   *     Ps = 1 0 5 2  -> Reset HP function-key mode.\n   *     Ps = 1 0 5 3  -> Reset SCO function-key mode.\n   *     Ps = 1 0 6 0  -> Reset legacy keyboard emulation (X11R6).\n   *     Ps = 1 0 6 1  -> Reset keyboard emulation to Sun/PC style.\n   *     Ps = 2 0 0 4  -> Reset bracketed paste mode.\n   *\n   * @vt: #P[See below for supported modes.]    CSI DECRST  \"DEC Private Reset Mode\" \"CSI ? Pm l\"  \"Reset various terminal attributes.\"\n   * Supported param values by DECRST:\n   *\n   * | param | Action                                                  | Support |\n   * | ----- | ------------------------------------------------------- | ------- |\n   * | 1     | Normal Cursor Keys (DECCKM).                            | #Y      |\n   * | 2     | Designate VT52 mode (DECANM).                           | #N      |\n   * | 3     | 80 Column Mode (DECCOLM).                               | #B[Switches to old column width instead of 80.] |\n   * | 6     | Normal Cursor Mode (DECOM).                             | #Y      |\n   * | 7     | No Wraparound Mode (DECAWM).                            | #Y      |\n   * | 8     | No Auto-repeat Keys (DECARM).                           | #N      |\n   * | 9     | Don't send Mouse X & Y on button press.                 | #Y      |\n   * | 12    | Stop Blinking Cursor.                                   | #Y      |\n   * | 25    | Hide Cursor (DECTCEM).                                  | #Y      |\n   * | 45    | No reverse wrap-around.                                 | #Y      |\n   * | 47    | Use Normal Screen Buffer.                               | #Y      |\n   * | 66    | Numeric keypad (DECNKM).                                | #Y      |\n   * | 1000  | Don't send Mouse reports.                               | #Y      |\n   * | 1002  | Don't use Cell Motion Mouse Tracking.                   | #Y      |\n   * | 1003  | Don't use All Motion Mouse Tracking.                    | #Y      |\n   * | 1004  | Don't send FocusIn/FocusOut events.                     | #Y      |\n   * | 1005  | Disable UTF-8 Mouse Mode.                               | #N      |\n   * | 1006  | Disable SGR Mouse Mode.                                 | #Y      |\n   * | 1015  | Disable urxvt Mouse Mode.                               | #N      |\n   * | 1016  | Disable SGR-Pixels Mouse Mode.                          | #Y      |\n   * | 1047  | Use Normal Screen Buffer (clearing screen if in alt).   | #Y      |\n   * | 1048  | Restore cursor as in DECRC.                             | #Y      |\n   * | 1049  | Use Normal Screen Buffer and restore cursor.            | #Y      |\n   * | 2004  | Reset bracketed paste mode.                             | #Y      |\n   *\n   *\n   * FIXME: DECCOLM is currently broken (already fixed in window options PR)\n   */\n  public resetModePrivate(params: IParams): boolean {\n    for (let i = 0; i < params.length; i++) {\n      switch (params.params[i]) {\n        case 1:\n          this._coreService.decPrivateModes.applicationCursorKeys = false;\n          break;\n        case 3:\n          /**\n           * DECCOLM - 80 column mode.\n           * This is only active if 'SetWinLines' (24) is enabled\n           * through `options.windowsOptions`.\n           */\n          if (this._optionsService.rawOptions.windowOptions.setWinLines) {\n            this._bufferService.resize(80, this._bufferService.rows);\n            this._onRequestReset.fire();\n          }\n          break;\n        case 6:\n          this._coreService.decPrivateModes.origin = false;\n          this._setCursor(0, 0);\n          break;\n        case 7:\n          this._coreService.decPrivateModes.wraparound = false;\n          break;\n        case 12:\n          this._optionsService.options.cursorBlink = false;\n          break;\n        case 45:\n          this._coreService.decPrivateModes.reverseWraparound = false;\n          break;\n        case 66:\n          this._logService.debug('Switching back to normal keypad.');\n          this._coreService.decPrivateModes.applicationKeypad = false;\n          this._onRequestSyncScrollBar.fire();\n          break;\n        case 9: // X10 Mouse\n        case 1000: // vt200 mouse\n        case 1002: // button event mouse\n        case 1003: // any event mouse\n          this._coreMouseService.activeProtocol = 'NONE';\n          break;\n        case 1004: // send focusin/focusout events\n          this._coreService.decPrivateModes.sendFocus = false;\n          break;\n        case 1005: // utf8 ext mode mouse - removed in #2507\n          this._logService.debug('DECRST 1005 not supported (see #2507)');\n          break;\n        case 1006: // sgr ext mode mouse\n          this._coreMouseService.activeEncoding = 'DEFAULT';\n          break;\n        case 1015: // urxvt ext mode mouse - removed in #2507\n          this._logService.debug('DECRST 1015 not supported (see #2507)');\n          break;\n        case 1016: // sgr pixels mode mouse\n          this._coreMouseService.activeEncoding = 'DEFAULT';\n          break;\n        case 25: // hide cursor\n          this._coreService.isCursorHidden = true;\n          break;\n        case 1048: // alt screen cursor\n          this.restoreCursor();\n          break;\n        case 1049: // alt screen buffer cursor\n        // FALL-THROUGH\n        case 47: // normal screen buffer\n        case 1047: // normal screen buffer - clearing it first\n          // Ensure the selection manager has the correct buffer\n          this._bufferService.buffers.activateNormalBuffer();\n          if (params.params[i] === 1049) {\n            this.restoreCursor();\n          }\n          this._coreService.isCursorInitialized = true;\n          this._onRequestRefreshRows.fire(undefined);\n          this._onRequestSyncScrollBar.fire();\n          break;\n        case 2004: // bracketed paste mode (https://cirw.in/blog/bracketed-paste)\n          this._coreService.decPrivateModes.bracketedPasteMode = false;\n          break;\n      }\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps $ p Request ANSI Mode (DECRQM).\n   *\n   * Reports CSI Ps; Pm $ y (DECRPM), where Ps is the mode number as in SM/RM,\n   * and Pm is the mode value:\n   *    0 - not recognized\n   *    1 - set\n   *    2 - reset\n   *    3 - permanently set\n   *    4 - permanently reset\n   *\n   * @vt: #Y  CSI   DECRQM  \"Request Mode\"  \"CSI Ps $p\"  \"Request mode state.\"\n   * Returns a report as `CSI Ps; Pm $ y` (DECRPM), where `Ps` is the mode number as in SM/RM\n   * or DECSET/DECRST, and `Pm` is the mode value:\n   * - 0: not recognized\n   * - 1: set\n   * - 2: reset\n   * - 3: permanently set\n   * - 4: permanently reset\n   *\n   * For modes not understood xterm.js always returns `notRecognized`. In general this means,\n   * that a certain operation mode is not implemented and cannot be used.\n   *\n   * Modes changing the active terminal buffer (47, 1047, 1049) are not subqueried\n   * and only report, whether the alternate buffer is set.\n   *\n   * Mouse encodings and mouse protocols are handled mutual exclusive,\n   * thus only one of each of those can be set at a given time.\n   *\n   * There is a chance, that some mode reports are not fully in line with xterm.js' behavior,\n   * e.g. if the default implementation already exposes a certain behavior. If you find\n   * discrepancies in the mode reports, please file a bug.\n   */\n  public requestMode(params: IParams, ansi: boolean): boolean {\n    // return value as in DECRPM\n    const enum V {\n      NOT_RECOGNIZED = 0,\n      SET = 1,\n      RESET = 2,\n      PERMANENTLY_SET = 3,\n      PERMANENTLY_RESET = 4\n    }\n\n    // access helpers\n    const dm = this._coreService.decPrivateModes;\n    const { activeProtocol: mouseProtocol, activeEncoding: mouseEncoding } = this._coreMouseService;\n    const cs = this._coreService;\n    const { buffers, cols } = this._bufferService;\n    const { active, alt } = buffers;\n    const opts = this._optionsService.rawOptions;\n\n    const f = (m: number, v: V): boolean => {\n      cs.triggerDataEvent(`${C0.ESC}[${ansi ? '' : '?'}${m};${v}$y`);\n      return true;\n    };\n    const b2v = (value: boolean): V => value ? V.SET : V.RESET;\n\n    const p = params.params[0];\n\n    if (ansi) {\n      if (p === 2) return f(p, V.PERMANENTLY_RESET);\n      if (p === 4) return f(p, b2v(cs.modes.insertMode));\n      if (p === 12) return f(p, V.PERMANENTLY_SET);\n      if (p === 20) return f(p, b2v(opts.convertEol));\n      return f(p, V.NOT_RECOGNIZED);\n    }\n\n    if (p === 1) return f(p, b2v(dm.applicationCursorKeys));\n    if (p === 3) return f(p, opts.windowOptions.setWinLines ? (cols === 80 ? V.RESET : cols === 132 ? V.SET : V.NOT_RECOGNIZED) : V.NOT_RECOGNIZED);\n    if (p === 6) return f(p, b2v(dm.origin));\n    if (p === 7) return f(p, b2v(dm.wraparound));\n    if (p === 8) return f(p, V.PERMANENTLY_SET);\n    if (p === 9) return f(p, b2v(mouseProtocol === 'X10'));\n    if (p === 12) return f(p, b2v(opts.cursorBlink));\n    if (p === 25) return f(p, b2v(!cs.isCursorHidden));\n    if (p === 45) return f(p, b2v(dm.reverseWraparound));\n    if (p === 66) return f(p, b2v(dm.applicationKeypad));\n    if (p === 67) return f(p, V.PERMANENTLY_RESET);\n    if (p === 1000) return f(p, b2v(mouseProtocol === 'VT200'));\n    if (p === 1002) return f(p, b2v(mouseProtocol === 'DRAG'));\n    if (p === 1003) return f(p, b2v(mouseProtocol === 'ANY'));\n    if (p === 1004) return f(p, b2v(dm.sendFocus));\n    if (p === 1005) return f(p, V.PERMANENTLY_RESET);\n    if (p === 1006) return f(p, b2v(mouseEncoding === 'SGR'));\n    if (p === 1015) return f(p, V.PERMANENTLY_RESET);\n    if (p === 1016) return f(p, b2v(mouseEncoding === 'SGR_PIXELS'));\n    if (p === 1048) return f(p, V.SET); // xterm always returns SET here\n    if (p === 47 || p === 1047 || p === 1049) return f(p, b2v(active === alt));\n    if (p === 2004) return f(p, b2v(dm.bracketedPasteMode));\n    return f(p, V.NOT_RECOGNIZED);\n  }\n\n  /**\n   * Helper to write color information packed with color mode.\n   */\n  private _updateAttrColor(color: number, mode: number, c1: number, c2: number, c3: number): number {\n    if (mode === 2) {\n      color |= Attributes.CM_RGB;\n      color &= ~Attributes.RGB_MASK;\n      color |= AttributeData.fromColorRGB([c1, c2, c3]);\n    } else if (mode === 5) {\n      color &= ~(Attributes.CM_MASK | Attributes.PCOLOR_MASK);\n      color |= Attributes.CM_P256 | (c1 & 0xff);\n    }\n    return color;\n  }\n\n  /**\n   * Helper to extract and apply color params/subparams.\n   * Returns advance for params index.\n   */\n  private _extractColor(params: IParams, pos: number, attr: IAttributeData): number {\n    // normalize params\n    // meaning: [target, CM, ign, val, val, val]\n    // RGB    : [ 38/48,  2, ign,   r,   g,   b]\n    // P256   : [ 38/48,  5, ign,   v, ign, ign]\n    const accu = [0, 0, -1, 0, 0, 0];\n\n    // alignment placeholder for non color space sequences\n    let cSpace = 0;\n\n    // return advance we took in params\n    let advance = 0;\n\n    do {\n      accu[advance + cSpace] = params.params[pos + advance];\n      if (params.hasSubParams(pos + advance)) {\n        const subparams = params.getSubParams(pos + advance)!;\n        let i = 0;\n        do {\n          if (accu[1] === 5) {\n            cSpace = 1;\n          }\n          accu[advance + i + 1 + cSpace] = subparams[i];\n        } while (++i < subparams.length && i + advance + 1 + cSpace < accu.length);\n        break;\n      }\n      // exit early if can decide color mode with semicolons\n      if ((accu[1] === 5 && advance + cSpace >= 2)\n        || (accu[1] === 2 && advance + cSpace >= 5)) {\n        break;\n      }\n      // offset colorSpace slot for semicolon mode\n      if (accu[1]) {\n        cSpace = 1;\n      }\n    } while (++advance + pos < params.length && advance + cSpace < accu.length);\n\n    // set default values to 0\n    for (let i = 2; i < accu.length; ++i) {\n      if (accu[i] === -1) {\n        accu[i] = 0;\n      }\n    }\n\n    // apply colors\n    switch (accu[0]) {\n      case 38:\n        attr.fg = this._updateAttrColor(attr.fg, accu[1], accu[3], accu[4], accu[5]);\n        break;\n      case 48:\n        attr.bg = this._updateAttrColor(attr.bg, accu[1], accu[3], accu[4], accu[5]);\n        break;\n      case 58:\n        attr.extended = attr.extended.clone();\n        attr.extended.underlineColor = this._updateAttrColor(attr.extended.underlineColor, accu[1], accu[3], accu[4], accu[5]);\n    }\n\n    return advance;\n  }\n\n  /**\n   * SGR 4 subparams:\n   *    4:0   -   equal to SGR 24 (turn off all underline)\n   *    4:1   -   equal to SGR 4 (single underline)\n   *    4:2   -   equal to SGR 21 (double underline)\n   *    4:3   -   curly underline\n   *    4:4   -   dotted underline\n   *    4:5   -   dashed underline\n   */\n  private _processUnderline(style: number, attr: IAttributeData): void {\n    // treat extended attrs as immutable, thus always clone from old one\n    // this is needed since the buffer only holds references to it\n    attr.extended = attr.extended.clone();\n\n    // default to 1 == single underline\n    if (!~style || style > 5) {\n      style = 1;\n    }\n    attr.extended.underlineStyle = style;\n    attr.fg |= FgFlags.UNDERLINE;\n\n    // 0 deactivates underline\n    if (style === 0) {\n      attr.fg &= ~FgFlags.UNDERLINE;\n    }\n\n    // update HAS_EXTENDED in BG\n    attr.updateExtended();\n  }\n\n  private _processSGR0(attr: IAttributeData): void {\n    attr.fg = DEFAULT_ATTR_DATA.fg;\n    attr.bg = DEFAULT_ATTR_DATA.bg;\n    attr.extended = attr.extended.clone();\n    // Reset underline style and color. Note that we don't want to reset other\n    // fields such as the url id.\n    attr.extended.underlineStyle = UnderlineStyle.NONE;\n    attr.extended.underlineColor &= ~(Attributes.CM_MASK | Attributes.RGB_MASK);\n    attr.updateExtended();\n  }\n\n  /**\n   * CSI Pm m  Character Attributes (SGR).\n   *\n   * @vt: #P[See below for supported attributes.]    CSI SGR   \"Select Graphic Rendition\"  \"CSI Pm m\"  \"Set/Reset various text attributes.\"\n   * SGR selects one or more character attributes at the same time. Multiple params (up to 32)\n   * are applied in order from left to right. The changed attributes are applied to all new\n   * characters received. If you move characters in the viewport by scrolling or any other means,\n   * then the attributes move with the characters.\n   *\n   * Supported param values by SGR:\n   *\n   * | Param     | Meaning                                                  | Support |\n   * | --------- | -------------------------------------------------------- | ------- |\n   * | 0         | Normal (default). Resets any other preceding SGR.        | #Y      |\n   * | 1         | Bold. (also see `options.drawBoldTextInBrightColors`)    | #Y      |\n   * | 2         | Faint, decreased intensity.                              | #Y      |\n   * | 3         | Italic.                                                  | #Y      |\n   * | 4         | Underlined (see below for style support).                | #Y      |\n   * | 5         | Slowly blinking.                                         | #N      |\n   * | 6         | Rapidly blinking.                                        | #N      |\n   * | 7         | Inverse. Flips foreground and background color.          | #Y      |\n   * | 8         | Invisible (hidden).                                      | #Y      |\n   * | 9         | Crossed-out characters (strikethrough).                  | #Y      |\n   * | 21        | Doubly underlined.                                       | #Y      |\n   * | 22        | Normal (neither bold nor faint).                         | #Y      |\n   * | 23        | No italic.                                               | #Y      |\n   * | 24        | Not underlined.                                          | #Y      |\n   * | 25        | Steady (not blinking).                                   | #Y      |\n   * | 27        | Positive (not inverse).                                  | #Y      |\n   * | 28        | Visible (not hidden).                                    | #Y      |\n   * | 29        | Not Crossed-out (strikethrough).                         | #Y      |\n   * | 30        | Foreground color: Black.                                 | #Y      |\n   * | 31        | Foreground color: Red.                                   | #Y      |\n   * | 32        | Foreground color: Green.                                 | #Y      |\n   * | 33        | Foreground color: Yellow.                                | #Y      |\n   * | 34        | Foreground color: Blue.                                  | #Y      |\n   * | 35        | Foreground color: Magenta.                               | #Y      |\n   * | 36        | Foreground color: Cyan.                                  | #Y      |\n   * | 37        | Foreground color: White.                                 | #Y      |\n   * | 38        | Foreground color: Extended color.                        | #P[Support for RGB and indexed colors, see below.] |\n   * | 39        | Foreground color: Default (original).                    | #Y      |\n   * | 40        | Background color: Black.                                 | #Y      |\n   * | 41        | Background color: Red.                                   | #Y      |\n   * | 42        | Background color: Green.                                 | #Y      |\n   * | 43        | Background color: Yellow.                                | #Y      |\n   * | 44        | Background color: Blue.                                  | #Y      |\n   * | 45        | Background color: Magenta.                               | #Y      |\n   * | 46        | Background color: Cyan.                                  | #Y      |\n   * | 47        | Background color: White.                                 | #Y      |\n   * | 48        | Background color: Extended color.                        | #P[Support for RGB and indexed colors, see below.] |\n   * | 49        | Background color: Default (original).                    | #Y      |\n   * | 53        | Overlined.                                               | #Y      |\n   * | 55        | Not Overlined.                                           | #Y      |\n   * | 58        | Underline color: Extended color.                         | #P[Support for RGB and indexed colors, see below.] |\n   * | 90 - 97   | Bright foreground color (analogous to 30 - 37).          | #Y      |\n   * | 100 - 107 | Bright background color (analogous to 40 - 47).          | #Y      |\n   *\n   * Underline supports subparams to denote the style in the form `4 : x`:\n   *\n   * | x      | Meaning                                                       | Support |\n   * | ------ | ------------------------------------------------------------- | ------- |\n   * | 0      | No underline. Same as `SGR 24 m`.                             | #Y      |\n   * | 1      | Single underline. Same as `SGR 4 m`.                          | #Y      |\n   * | 2      | Double underline.                                             | #Y      |\n   * | 3      | Curly underline.                                              | #Y      |\n   * | 4      | Dotted underline.                                             | #Y      |\n   * | 5      | Dashed underline.                                             | #Y      |\n   * | other  | Single underline. Same as `SGR 4 m`.                          | #Y      |\n   *\n   * Extended colors are supported for foreground (Ps=38), background (Ps=48) and underline (Ps=58)\n   * as follows:\n   *\n   * | Ps + 1 | Meaning                                                       | Support |\n   * | ------ | ------------------------------------------------------------- | ------- |\n   * | 0      | Implementation defined.                                       | #N      |\n   * | 1      | Transparent.                                                  | #N      |\n   * | 2      | RGB color as `Ps ; 2 ; R ; G ; B` or `Ps : 2 : : R : G : B`.  | #Y      |\n   * | 3      | CMY color.                                                    | #N      |\n   * | 4      | CMYK color.                                                   | #N      |\n   * | 5      | Indexed (256 colors) as `Ps ; 5 ; INDEX` or `Ps : 5 : INDEX`. | #Y      |\n   *\n   *\n   * FIXME: blinking is implemented in attrs, but not working in renderers?\n   * FIXME: remove dead branch for p=100\n   */\n  public charAttributes(params: IParams): boolean {\n    // Optimize a single SGR0.\n    if (params.length === 1 && params.params[0] === 0) {\n      this._processSGR0(this._curAttrData);\n      return true;\n    }\n\n    const l = params.length;\n    let p;\n    const attr = this._curAttrData;\n\n    for (let i = 0; i < l; i++) {\n      p = params.params[i];\n      if (p >= 30 && p <= 37) {\n        // fg color 8\n        attr.fg &= ~(Attributes.CM_MASK | Attributes.PCOLOR_MASK);\n        attr.fg |= Attributes.CM_P16 | (p - 30);\n      } else if (p >= 40 && p <= 47) {\n        // bg color 8\n        attr.bg &= ~(Attributes.CM_MASK | Attributes.PCOLOR_MASK);\n        attr.bg |= Attributes.CM_P16 | (p - 40);\n      } else if (p >= 90 && p <= 97) {\n        // fg color 16\n        attr.fg &= ~(Attributes.CM_MASK | Attributes.PCOLOR_MASK);\n        attr.fg |= Attributes.CM_P16 | (p - 90) | 8;\n      } else if (p >= 100 && p <= 107) {\n        // bg color 16\n        attr.bg &= ~(Attributes.CM_MASK | Attributes.PCOLOR_MASK);\n        attr.bg |= Attributes.CM_P16 | (p - 100) | 8;\n      } else if (p === 0) {\n        // default\n        this._processSGR0(attr);\n      } else if (p === 1) {\n        // bold text\n        attr.fg |= FgFlags.BOLD;\n      } else if (p === 3) {\n        // italic text\n        attr.bg |= BgFlags.ITALIC;\n      } else if (p === 4) {\n        // underlined text\n        attr.fg |= FgFlags.UNDERLINE;\n        this._processUnderline(params.hasSubParams(i) ? params.getSubParams(i)![0] : UnderlineStyle.SINGLE, attr);\n      } else if (p === 5) {\n        // blink\n        attr.fg |= FgFlags.BLINK;\n      } else if (p === 7) {\n        // inverse and positive\n        // test with: echo -e '\\e[31m\\e[42mhello\\e[7mworld\\e[27mhi\\e[m'\n        attr.fg |= FgFlags.INVERSE;\n      } else if (p === 8) {\n        // invisible\n        attr.fg |= FgFlags.INVISIBLE;\n      } else if (p === 9) {\n        // strikethrough\n        attr.fg |= FgFlags.STRIKETHROUGH;\n      } else if (p === 2) {\n        // dimmed text\n        attr.bg |= BgFlags.DIM;\n      } else if (p === 21) {\n        // double underline\n        this._processUnderline(UnderlineStyle.DOUBLE, attr);\n      } else if (p === 22) {\n        // not bold nor faint\n        attr.fg &= ~FgFlags.BOLD;\n        attr.bg &= ~BgFlags.DIM;\n      } else if (p === 23) {\n        // not italic\n        attr.bg &= ~BgFlags.ITALIC;\n      } else if (p === 24) {\n        // not underlined\n        attr.fg &= ~FgFlags.UNDERLINE;\n        this._processUnderline(UnderlineStyle.NONE, attr);\n      } else if (p === 25) {\n        // not blink\n        attr.fg &= ~FgFlags.BLINK;\n      } else if (p === 27) {\n        // not inverse\n        attr.fg &= ~FgFlags.INVERSE;\n      } else if (p === 28) {\n        // not invisible\n        attr.fg &= ~FgFlags.INVISIBLE;\n      } else if (p === 29) {\n        // not strikethrough\n        attr.fg &= ~FgFlags.STRIKETHROUGH;\n      } else if (p === 39) {\n        // reset fg\n        attr.fg &= ~(Attributes.CM_MASK | Attributes.RGB_MASK);\n        attr.fg |= DEFAULT_ATTR_DATA.fg & (Attributes.PCOLOR_MASK | Attributes.RGB_MASK);\n      } else if (p === 49) {\n        // reset bg\n        attr.bg &= ~(Attributes.CM_MASK | Attributes.RGB_MASK);\n        attr.bg |= DEFAULT_ATTR_DATA.bg & (Attributes.PCOLOR_MASK | Attributes.RGB_MASK);\n      } else if (p === 38 || p === 48 || p === 58) {\n        // fg color 256 and RGB\n        i += this._extractColor(params, i, attr);\n      } else if (p === 53) {\n        // overline\n        attr.bg |= BgFlags.OVERLINE;\n      } else if (p === 55) {\n        // not overline\n        attr.bg &= ~BgFlags.OVERLINE;\n      } else if (p === 59) {\n        attr.extended = attr.extended.clone();\n        attr.extended.underlineColor = -1;\n        attr.updateExtended();\n      } else if (p === 100) { // FIXME: dead branch, p=100 already handled above!\n        // reset fg/bg\n        attr.fg &= ~(Attributes.CM_MASK | Attributes.RGB_MASK);\n        attr.fg |= DEFAULT_ATTR_DATA.fg & (Attributes.PCOLOR_MASK | Attributes.RGB_MASK);\n        attr.bg &= ~(Attributes.CM_MASK | Attributes.RGB_MASK);\n        attr.bg |= DEFAULT_ATTR_DATA.bg & (Attributes.PCOLOR_MASK | Attributes.RGB_MASK);\n      } else {\n        this._logService.debug('Unknown SGR attribute: %d.', p);\n      }\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps n  Device Status Report (DSR).\n   *     Ps = 5  -> Status Report.  Result (``OK'') is\n   *   CSI 0 n\n   *     Ps = 6  -> Report Cursor Position (CPR) [row;column].\n   *   Result is\n   *   CSI r ; c R\n   * CSI ? Ps n\n   *   Device Status Report (DSR, DEC-specific).\n   *     Ps = 6  -> Report Cursor Position (CPR) [row;column] as CSI\n   *     ? r ; c R (assumes page is zero).\n   *     Ps = 1 5  -> Report Printer status as CSI ? 1 0  n  (ready).\n   *     or CSI ? 1 1  n  (not ready).\n   *     Ps = 2 5  -> Report UDK status as CSI ? 2 0  n  (unlocked)\n   *     or CSI ? 2 1  n  (locked).\n   *     Ps = 2 6  -> Report Keyboard status as\n   *   CSI ? 2 7  ;  1  ;  0  ;  0  n  (North American).\n   *   The last two parameters apply to VT400 & up, and denote key-\n   *   board ready and LK01 respectively.\n   *     Ps = 5 3  -> Report Locator status as\n   *   CSI ? 5 3  n  Locator available, if compiled-in, or\n   *   CSI ? 5 0  n  No Locator, if not.\n   *\n   * @vt: #Y CSI DSR   \"Device Status Report\"  \"CSI Ps n\"  \"Request cursor position (CPR) with `Ps` = 6.\"\n   */\n  public deviceStatus(params: IParams): boolean {\n    switch (params.params[0]) {\n      case 5:\n        // status report\n        this._coreService.triggerDataEvent(`${C0.ESC}[0n`);\n        break;\n      case 6:\n        // cursor position\n        const y = this._activeBuffer.y + 1;\n        const x = this._activeBuffer.x + 1;\n        this._coreService.triggerDataEvent(`${C0.ESC}[${y};${x}R`);\n        break;\n    }\n    return true;\n  }\n\n  // @vt: #P[Only CPR is supported.]  CSI DECDSR  \"DEC Device Status Report\"  \"CSI ? Ps n\"  \"Only CPR is supported (same as DSR).\"\n  public deviceStatusPrivate(params: IParams): boolean {\n    // modern xterm doesnt seem to\n    // respond to any of these except ?6, 6, and 5\n    switch (params.params[0]) {\n      case 6:\n        // cursor position\n        const y = this._activeBuffer.y + 1;\n        const x = this._activeBuffer.x + 1;\n        this._coreService.triggerDataEvent(`${C0.ESC}[?${y};${x}R`);\n        break;\n      case 15:\n        // no printer\n        // this.handler(C0.ESC + '[?11n');\n        break;\n      case 25:\n        // dont support user defined keys\n        // this.handler(C0.ESC + '[?21n');\n        break;\n      case 26:\n        // north american keyboard\n        // this.handler(C0.ESC + '[?27;1;0;0n');\n        break;\n      case 53:\n        // no dec locator/mouse\n        // this.handler(C0.ESC + '[?50n');\n        break;\n    }\n    return true;\n  }\n\n  /**\n   * CSI ! p   Soft terminal reset (DECSTR).\n   * http://vt100.net/docs/vt220-rm/table4-10.html\n   *\n   * @vt: #Y CSI DECSTR  \"Soft Terminal Reset\"   \"CSI ! p\"   \"Reset several terminal attributes to initial state.\"\n   * There are two terminal reset sequences - RIS and DECSTR. While RIS performs almost a full\n   * terminal bootstrap, DECSTR only resets certain attributes. For most needs DECSTR should be\n   * sufficient.\n   *\n   * The following terminal attributes are reset to default values:\n   * - IRM is reset (dafault = false)\n   * - scroll margins are reset (default = viewport size)\n   * - erase attributes are reset to default\n   * - charsets are reset\n   * - DECSC data is reset to initial values\n   * - DECOM is reset to absolute mode\n   *\n   *\n   * FIXME: there are several more attributes missing (see VT520 manual)\n   */\n  public softReset(params: IParams): boolean {\n    this._coreService.isCursorHidden = false;\n    this._onRequestSyncScrollBar.fire();\n    this._activeBuffer.scrollTop = 0;\n    this._activeBuffer.scrollBottom = this._bufferService.rows - 1;\n    this._curAttrData = DEFAULT_ATTR_DATA.clone();\n    this._coreService.reset();\n    this._charsetService.reset();\n\n    // reset DECSC data\n    this._activeBuffer.savedX = 0;\n    this._activeBuffer.savedY = this._activeBuffer.ybase;\n    this._activeBuffer.savedCurAttrData.fg = this._curAttrData.fg;\n    this._activeBuffer.savedCurAttrData.bg = this._curAttrData.bg;\n    this._activeBuffer.savedCharset = this._charsetService.charset;\n\n    // reset DECOM\n    this._coreService.decPrivateModes.origin = false;\n    return true;\n  }\n\n  /**\n   * CSI Ps SP q  Set cursor style (DECSCUSR, VT520).\n   *   Ps = 0  -> reset to option.\n   *   Ps = 1  -> blinking block (default).\n   *   Ps = 2  -> steady block.\n   *   Ps = 3  -> blinking underline.\n   *   Ps = 4  -> steady underline.\n   *   Ps = 5  -> blinking bar (xterm).\n   *   Ps = 6  -> steady bar (xterm).\n   *\n   * @vt: #Y CSI DECSCUSR  \"Set Cursor Style\"  \"CSI Ps SP q\"   \"Set cursor style.\"\n   * Supported cursor styles:\n   *  - 0: reset to option\n   *  - empty, 1: blinking block\n   *  - 2: steady block\n   *  - 3: blinking underline\n   *  - 4: steady underline\n   *  - 5: blinking bar\n   *  - 6: steady bar\n   */\n  public setCursorStyle(params: IParams): boolean {\n    const param = params.length === 0 ? 1 : params.params[0];\n    if (param === 0) {\n      this._coreService.decPrivateModes.cursorStyle = undefined;\n      this._coreService.decPrivateModes.cursorBlink = undefined;\n    } else {\n      switch (param) {\n        case 1:\n        case 2:\n          this._coreService.decPrivateModes.cursorStyle = 'block';\n          break;\n        case 3:\n        case 4:\n          this._coreService.decPrivateModes.cursorStyle = 'underline';\n          break;\n        case 5:\n        case 6:\n          this._coreService.decPrivateModes.cursorStyle = 'bar';\n          break;\n      }\n      const isBlinking = param % 2 === 1;\n      this._coreService.decPrivateModes.cursorBlink = isBlinking;\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps ; Ps r\n   *   Set Scrolling Region [top;bottom] (default = full size of win-\n   *   dow) (DECSTBM).\n   *\n   * @vt: #Y CSI DECSTBM \"Set Top and Bottom Margin\" \"CSI Ps ; Ps r\" \"Set top and bottom margins of the viewport [top;bottom] (default = viewport size).\"\n   */\n  public setScrollRegion(params: IParams): boolean {\n    const top = params.params[0] || 1;\n    let bottom: number;\n\n    if (params.length < 2 || (bottom = params.params[1]) > this._bufferService.rows || bottom === 0) {\n      bottom = this._bufferService.rows;\n    }\n\n    if (bottom > top) {\n      this._activeBuffer.scrollTop = top - 1;\n      this._activeBuffer.scrollBottom = bottom - 1;\n      this._setCursor(0, 0);\n    }\n    return true;\n  }\n\n  /**\n   * CSI Ps ; Ps ; Ps t - Various window manipulations and reports (xterm)\n   *\n   * Note: Only those listed below are supported. All others are left to integrators and\n   * need special treatment based on the embedding environment.\n   *\n   *    Ps = 1 4                                                          supported\n   *      Report xterm text area size in pixels.\n   *      Result is CSI 4 ; height ; width t\n   *    Ps = 14 ; 2                                                       not implemented\n   *    Ps = 16                                                           supported\n   *      Report xterm character cell size in pixels.\n   *      Result is CSI 6 ; height ; width t\n   *    Ps = 18                                                           supported\n   *      Report the size of the text area in characters.\n   *      Result is CSI 8 ; height ; width t\n   *    Ps = 20                                                           supported\n   *      Report xterm window's icon label.\n   *      Result is OSC L label ST\n   *    Ps = 21                                                           supported\n   *      Report xterm window's title.\n   *      Result is OSC l label ST\n   *    Ps = 22 ; 0  -> Save xterm icon and window title on stack.        supported\n   *    Ps = 22 ; 1  -> Save xterm icon title on stack.                   supported\n   *    Ps = 22 ; 2  -> Save xterm window title on stack.                 supported\n   *    Ps = 23 ; 0  -> Restore xterm icon and window title from stack.   supported\n   *    Ps = 23 ; 1  -> Restore xterm icon title from stack.              supported\n   *    Ps = 23 ; 2  -> Restore xterm window title from stack.            supported\n   *    Ps >= 24                                                          not implemented\n   */\n  public windowOptions(params: IParams): boolean {\n    if (!paramToWindowOption(params.params[0], this._optionsService.rawOptions.windowOptions)) {\n      return true;\n    }\n    const second = (params.length > 1) ? params.params[1] : 0;\n    switch (params.params[0]) {\n      case 14:  // GetWinSizePixels, returns CSI 4 ; height ; width t\n        if (second !== 2) {\n          this._onRequestWindowsOptionsReport.fire(WindowsOptionsReportType.GET_WIN_SIZE_PIXELS);\n        }\n        break;\n      case 16:  // GetCellSizePixels, returns CSI 6 ; height ; width t\n        this._onRequestWindowsOptionsReport.fire(WindowsOptionsReportType.GET_CELL_SIZE_PIXELS);\n        break;\n      case 18:  // GetWinSizeChars, returns CSI 8 ; height ; width t\n        if (this._bufferService) {\n          this._coreService.triggerDataEvent(`${C0.ESC}[8;${this._bufferService.rows};${this._bufferService.cols}t`);\n        }\n        break;\n      case 22:  // PushTitle\n        if (second === 0 || second === 2) {\n          this._windowTitleStack.push(this._windowTitle);\n          if (this._windowTitleStack.length > STACK_LIMIT) {\n            this._windowTitleStack.shift();\n          }\n        }\n        if (second === 0 || second === 1) {\n          this._iconNameStack.push(this._iconName);\n          if (this._iconNameStack.length > STACK_LIMIT) {\n            this._iconNameStack.shift();\n          }\n        }\n        break;\n      case 23:  // PopTitle\n        if (second === 0 || second === 2) {\n          if (this._windowTitleStack.length) {\n            this.setTitle(this._windowTitleStack.pop()!);\n          }\n        }\n        if (second === 0 || second === 1) {\n          if (this._iconNameStack.length) {\n            this.setIconName(this._iconNameStack.pop()!);\n          }\n        }\n        break;\n    }\n    return true;\n  }\n\n\n  /**\n   * CSI s\n   * ESC 7\n   *   Save cursor (ANSI.SYS).\n   *\n   * @vt: #P[TODO...]  CSI SCOSC   \"Save Cursor\"   \"CSI s\"   \"Save cursor position, charmap and text attributes.\"\n   * @vt: #Y ESC  SC   \"Save Cursor\"   \"ESC 7\"   \"Save cursor position, charmap and text attributes.\"\n   */\n  public saveCursor(params?: IParams): boolean {\n    this._activeBuffer.savedX = this._activeBuffer.x;\n    this._activeBuffer.savedY = this._activeBuffer.ybase + this._activeBuffer.y;\n    this._activeBuffer.savedCurAttrData.fg = this._curAttrData.fg;\n    this._activeBuffer.savedCurAttrData.bg = this._curAttrData.bg;\n    this._activeBuffer.savedCharset = this._charsetService.charset;\n    return true;\n  }\n\n\n  /**\n   * CSI u\n   * ESC 8\n   *   Restore cursor (ANSI.SYS).\n   *\n   * @vt: #P[TODO...]  CSI SCORC \"Restore Cursor\"  \"CSI u\"   \"Restore cursor position, charmap and text attributes.\"\n   * @vt: #Y ESC  RC \"Restore Cursor\"  \"ESC 8\"   \"Restore cursor position, charmap and text attributes.\"\n   */\n  public restoreCursor(params?: IParams): boolean {\n    this._activeBuffer.x = this._activeBuffer.savedX || 0;\n    this._activeBuffer.y = Math.max(this._activeBuffer.savedY - this._activeBuffer.ybase, 0);\n    this._curAttrData.fg = this._activeBuffer.savedCurAttrData.fg;\n    this._curAttrData.bg = this._activeBuffer.savedCurAttrData.bg;\n    this._charsetService.charset = (this as any)._savedCharset;\n    if (this._activeBuffer.savedCharset) {\n      this._charsetService.charset = this._activeBuffer.savedCharset;\n    }\n    this._restrictCursor();\n    return true;\n  }\n\n\n  /**\n   * OSC 2; <data> ST (set window title)\n   *   Proxy to set window title.\n   *\n   * @vt: #P[Icon name is not exposed.]   OSC    0   \"Set Windows Title and Icon Name\"  \"OSC 0 ; Pt BEL\"  \"Set window title and icon name.\"\n   * Icon name is not supported. For Window Title see below.\n   *\n   * @vt: #Y     OSC    2   \"Set Windows Title\"  \"OSC 2 ; Pt BEL\"  \"Set window title.\"\n   * xterm.js does not manipulate the title directly, instead exposes changes via the event\n   * `Terminal.onTitleChange`.\n   */\n  public setTitle(data: string): boolean {\n    this._windowTitle = data;\n    this._onTitleChange.fire(data);\n    return true;\n  }\n\n  /**\n   * OSC 1; <data> ST\n   * Note: Icon name is not exposed.\n   */\n  public setIconName(data: string): boolean {\n    this._iconName = data;\n    return true;\n  }\n\n  /**\n   * OSC 4; <num> ; <text> ST (set ANSI color <num> to <text>)\n   *\n   * @vt: #Y    OSC    4    \"Set ANSI color\"   \"OSC 4 ; c ; spec BEL\" \"Change color number `c` to the color specified by `spec`.\"\n   * `c` is the color index between 0 and 255. The color format of `spec` is derived from\n   * `XParseColor` (see OSC 10 for supported formats). There may be multipe `c ; spec` pairs present\n   * in the same instruction. If `spec` contains `?` the terminal returns a sequence with the\n   * currently set color.\n   */\n  public setOrReportIndexedColor(data: string): boolean {\n    const event: IColorEvent = [];\n    const slots = data.split(';');\n    while (slots.length > 1) {\n      const idx = slots.shift() as string;\n      const spec = slots.shift() as string;\n      if (/^\\d+$/.exec(idx)) {\n        const index = parseInt(idx);\n        if (isValidColorIndex(index)) {\n          if (spec === '?') {\n            event.push({ type: ColorRequestType.REPORT, index });\n          } else {\n            const color = parseColor(spec);\n            if (color) {\n              event.push({ type: ColorRequestType.SET, index, color });\n            }\n          }\n        }\n      }\n    }\n    if (event.length) {\n      this._onColor.fire(event);\n    }\n    return true;\n  }\n\n  /**\n   * OSC 8 ; <params> ; <uri> ST - create hyperlink\n   * OSC 8 ; ; ST - finish hyperlink\n   *\n   * Test case:\n   *\n   * ```sh\n   * printf '\\e]8;;http://example.com\\e\\\\This is a link\\e]8;;\\e\\\\\\n'\n   * ```\n   *\n   * @vt: #Y    OSC    8    \"Create hyperlink\"   \"OSC 8 ; params ; uri BEL\" \"Create a hyperlink to `uri` using `params`.\"\n   * `uri` is a hyperlink starting with `http://`, `https://`, `ftp://`, `file://` or `mailto://`. `params` is an\n   * optional list of key=value assignments, separated by the : character.\n   * Example: `id=xyz123:foo=bar:baz=quux`.\n   * Currently only the id key is defined. Cells that share the same ID and URI share hover\n   * feedback. Use `OSC 8 ; ; BEL` to finish the current hyperlink.\n   */\n  public setHyperlink(data: string): boolean {\n    // Arg parsing is special cases to support unencoded semi-colons in the URIs (#4944)\n    const idx = data.indexOf(';');\n    if (idx === -1) {\n      // malformed sequence, just return as handled\n      return true;\n    }\n    const id = data.slice(0, idx).trim();\n    const uri = data.slice(idx + 1);\n    if (uri) {\n      return this._createHyperlink(id, uri);\n    }\n    if (id.trim()) {\n      return false;\n    }\n    return this._finishHyperlink();\n  }\n\n  private _createHyperlink(params: string, uri: string): boolean {\n    // It's legal to open a new hyperlink without explicitly finishing the previous one\n    if (this._getCurrentLinkId()) {\n      this._finishHyperlink();\n    }\n    const parsedParams = params.split(':');\n    let id: string | undefined;\n    const idParamIndex = parsedParams.findIndex(e => e.startsWith('id='));\n    if (idParamIndex !== -1) {\n      id = parsedParams[idParamIndex].slice(3) || undefined;\n    }\n    this._curAttrData.extended = this._curAttrData.extended.clone();\n    this._curAttrData.extended.urlId = this._oscLinkService.registerLink({ id, uri });\n    this._curAttrData.updateExtended();\n    return true;\n  }\n\n  private _finishHyperlink(): boolean {\n    this._curAttrData.extended = this._curAttrData.extended.clone();\n    this._curAttrData.extended.urlId = 0;\n    this._curAttrData.updateExtended();\n    return true;\n  }\n\n  // special colors - OSC 10 | 11 | 12\n  private _specialColors = [SpecialColorIndex.FOREGROUND, SpecialColorIndex.BACKGROUND, SpecialColorIndex.CURSOR];\n\n  /**\n   * Apply colors requests for special colors in OSC 10 | 11 | 12.\n   * Since these commands are stacking from multiple parameters,\n   * we handle them in a loop with an entry offset to `_specialColors`.\n   */\n  private _setOrReportSpecialColor(data: string, offset: number): boolean {\n    const slots = data.split(';');\n    for (let i = 0; i < slots.length; ++i, ++offset) {\n      if (offset >= this._specialColors.length) break;\n      if (slots[i] === '?') {\n        this._onColor.fire([{ type: ColorRequestType.REPORT, index: this._specialColors[offset] }]);\n      } else {\n        const color = parseColor(slots[i]);\n        if (color) {\n          this._onColor.fire([{ type: ColorRequestType.SET, index: this._specialColors[offset], color }]);\n        }\n      }\n    }\n    return true;\n  }\n\n  /**\n   * OSC 10 ; <xcolor name>|<?> ST - set or query default foreground color\n   *\n   * @vt: #Y  OSC   10    \"Set or query default foreground color\"   \"OSC 10 ; Pt BEL\"  \"Set or query default foreground color.\"\n   * To set the color, the following color specification formats are supported:\n   * - `rgb:<red>/<green>/<blue>` for  `<red>, <green>, <blue>` in `h | hh | hhh | hhhh`, where\n   *   `h` is a single hexadecimal digit (case insignificant). The different widths scale\n   *   from 4 bit (`h`) to 16 bit (`hhhh`) and get converted to 8 bit (`hh`).\n   * - `#RGB` - 4 bits per channel, expanded to `#R0G0B0`\n   * - `#RRGGBB` - 8 bits per channel\n   * - `#RRRGGGBBB` - 12 bits per channel, truncated to `#RRGGBB`\n   * - `#RRRRGGGGBBBB` - 16 bits per channel, truncated to `#RRGGBB`\n   *\n   * **Note:** X11 named colors are currently unsupported.\n   *\n   * If `Pt` contains `?` instead of a color specification, the terminal\n   * returns a sequence with the current default foreground color\n   * (use that sequence to restore the color after changes).\n   *\n   * **Note:** Other than xterm, xterm.js does not support OSC 12 - 19.\n   * Therefore stacking multiple `Pt` separated by `;` only works for the first two entries.\n   */\n  public setOrReportFgColor(data: string): boolean {\n    return this._setOrReportSpecialColor(data, 0);\n  }\n\n  /**\n   * OSC 11 ; <xcolor name>|<?> ST - set or query default background color\n   *\n   * @vt: #Y  OSC   11    \"Set or query default background color\"   \"OSC 11 ; Pt BEL\"  \"Same as OSC 10, but for default background.\"\n   */\n  public setOrReportBgColor(data: string): boolean {\n    return this._setOrReportSpecialColor(data, 1);\n  }\n\n  /**\n   * OSC 12 ; <xcolor name>|<?> ST - set or query default cursor color\n   *\n   * @vt: #Y  OSC   12    \"Set or query default cursor color\"   \"OSC 12 ; Pt BEL\"  \"Same as OSC 10, but for default cursor color.\"\n   */\n  public setOrReportCursorColor(data: string): boolean {\n    return this._setOrReportSpecialColor(data, 2);\n  }\n\n  /**\n   * OSC 104 ; <num> ST - restore ANSI color <num>\n   *\n   * @vt: #Y  OSC   104    \"Reset ANSI color\"   \"OSC 104 ; c BEL\" \"Reset color number `c` to themed color.\"\n   * `c` is the color index between 0 and 255. This function restores the default color for `c` as\n   * specified by the loaded theme. Any number of `c` parameters may be given.\n   * If no parameters are given, the entire indexed color table will be reset.\n   */\n  public restoreIndexedColor(data: string): boolean {\n    if (!data) {\n      this._onColor.fire([{ type: ColorRequestType.RESTORE }]);\n      return true;\n    }\n    const event: IColorEvent = [];\n    const slots = data.split(';');\n    for (let i = 0; i < slots.length; ++i) {\n      if (/^\\d+$/.exec(slots[i])) {\n        const index = parseInt(slots[i]);\n        if (isValidColorIndex(index)) {\n          event.push({ type: ColorRequestType.RESTORE, index });\n        }\n      }\n    }\n    if (event.length) {\n      this._onColor.fire(event);\n    }\n    return true;\n  }\n\n  /**\n   * OSC 110 ST - restore default foreground color\n   *\n   * @vt: #Y  OSC   110    \"Restore default foreground color\"   \"OSC 110 BEL\"  \"Restore default foreground to themed color.\"\n   */\n  public restoreFgColor(data: string): boolean {\n    this._onColor.fire([{ type: ColorRequestType.RESTORE, index: SpecialColorIndex.FOREGROUND }]);\n    return true;\n  }\n\n  /**\n   * OSC 111 ST - restore default background color\n   *\n   * @vt: #Y  OSC   111    \"Restore default background color\"   \"OSC 111 BEL\"  \"Restore default background to themed color.\"\n   */\n  public restoreBgColor(data: string): boolean {\n    this._onColor.fire([{ type: ColorRequestType.RESTORE, index: SpecialColorIndex.BACKGROUND }]);\n    return true;\n  }\n\n  /**\n   * OSC 112 ST - restore default cursor color\n   *\n   * @vt: #Y  OSC   112    \"Restore default cursor color\"   \"OSC 112 BEL\"  \"Restore default cursor to themed color.\"\n   */\n  public restoreCursorColor(data: string): boolean {\n    this._onColor.fire([{ type: ColorRequestType.RESTORE, index: SpecialColorIndex.CURSOR }]);\n    return true;\n  }\n\n  /**\n   * ESC E\n   * C1.NEL\n   *   DEC mnemonic: NEL (https://vt100.net/docs/vt510-rm/NEL)\n   *   Moves cursor to first position on next line.\n   *\n   * @vt: #Y   C1    NEL   \"Next Line\"   \"\\x85\"    \"Move the cursor to the beginning of the next row.\"\n   * @vt: #Y   ESC   NEL   \"Next Line\"   \"ESC E\"   \"Move the cursor to the beginning of the next row.\"\n   */\n  public nextLine(): boolean {\n    this._activeBuffer.x = 0;\n    this.index();\n    return true;\n  }\n\n  /**\n   * ESC =\n   *   DEC mnemonic: DECKPAM (https://vt100.net/docs/vt510-rm/DECKPAM.html)\n   *   Enables the numeric keypad to send application sequences to the host.\n   */\n  public keypadApplicationMode(): boolean {\n    this._logService.debug('Serial port requested application keypad.');\n    this._coreService.decPrivateModes.applicationKeypad = true;\n    this._onRequestSyncScrollBar.fire();\n    return true;\n  }\n\n  /**\n   * ESC >\n   *   DEC mnemonic: DECKPNM (https://vt100.net/docs/vt510-rm/DECKPNM.html)\n   *   Enables the keypad to send numeric characters to the host.\n   */\n  public keypadNumericMode(): boolean {\n    this._logService.debug('Switching back to normal keypad.');\n    this._coreService.decPrivateModes.applicationKeypad = false;\n    this._onRequestSyncScrollBar.fire();\n    return true;\n  }\n\n  /**\n   * ESC % @\n   * ESC % G\n   *   Select default character set. UTF-8 is not supported (string are unicode anyways)\n   *   therefore ESC % G does the same.\n   */\n  public selectDefaultCharset(): boolean {\n    this._charsetService.setgLevel(0);\n    this._charsetService.setgCharset(0, DEFAULT_CHARSET); // US (default)\n    return true;\n  }\n\n  /**\n   * ESC ( C\n   *   Designate G0 Character Set, VT100, ISO 2022.\n   * ESC ) C\n   *   Designate G1 Character Set (ISO 2022, VT100).\n   * ESC * C\n   *   Designate G2 Character Set (ISO 2022, VT220).\n   * ESC + C\n   *   Designate G3 Character Set (ISO 2022, VT220).\n   * ESC - C\n   *   Designate G1 Character Set (VT300).\n   * ESC . C\n   *   Designate G2 Character Set (VT300).\n   * ESC / C\n   *   Designate G3 Character Set (VT300). C = A  -> ISO Latin-1 Supplemental. - Supported?\n   */\n  public selectCharset(collectAndFlag: string): boolean {\n    if (collectAndFlag.length !== 2) {\n      this.selectDefaultCharset();\n      return true;\n    }\n    if (collectAndFlag[0] === '/') {\n      return true;  // TODO: Is this supported?\n    }\n    this._charsetService.setgCharset(GLEVEL[collectAndFlag[0]], CHARSETS[collectAndFlag[1]] || DEFAULT_CHARSET);\n    return true;\n  }\n\n  /**\n   * ESC D\n   * C1.IND\n   *   DEC mnemonic: IND (https://vt100.net/docs/vt510-rm/IND.html)\n   *   Moves the cursor down one line in the same column.\n   *\n   * @vt: #Y   C1    IND   \"Index\"   \"\\x84\"    \"Move the cursor one line down scrolling if needed.\"\n   * @vt: #Y   ESC   IND   \"Index\"   \"ESC D\"   \"Move the cursor one line down scrolling if needed.\"\n   */\n  public index(): boolean {\n    this._restrictCursor();\n    this._activeBuffer.y++;\n    if (this._activeBuffer.y === this._activeBuffer.scrollBottom + 1) {\n      this._activeBuffer.y--;\n      this._bufferService.scroll(this._eraseAttrData());\n    } else if (this._activeBuffer.y >= this._bufferService.rows) {\n      this._activeBuffer.y = this._bufferService.rows - 1;\n    }\n    this._restrictCursor();\n    return true;\n  }\n\n  /**\n   * ESC H\n   * C1.HTS\n   *   DEC mnemonic: HTS (https://vt100.net/docs/vt510-rm/HTS.html)\n   *   Sets a horizontal tab stop at the column position indicated by\n   *   the value of the active column when the terminal receives an HTS.\n   *\n   * @vt: #Y   C1    HTS   \"Horizontal Tabulation Set\" \"\\x88\"    \"Places a tab stop at the current cursor position.\"\n   * @vt: #Y   ESC   HTS   \"Horizontal Tabulation Set\" \"ESC H\"   \"Places a tab stop at the current cursor position.\"\n   */\n  public tabSet(): boolean {\n    this._activeBuffer.tabs[this._activeBuffer.x] = true;\n    return true;\n  }\n\n  /**\n   * ESC M\n   * C1.RI\n   *   DEC mnemonic: HTS\n   *   Moves the cursor up one line in the same column. If the cursor is at the top margin,\n   *   the page scrolls down.\n   *\n   * @vt: #Y ESC  IR \"Reverse Index\" \"ESC M\"  \"Move the cursor one line up scrolling if needed.\"\n   */\n  public reverseIndex(): boolean {\n    this._restrictCursor();\n    if (this._activeBuffer.y === this._activeBuffer.scrollTop) {\n      // possibly move the code below to term.reverseScroll();\n      // test: echo -ne '\\e[1;1H\\e[44m\\eM\\e[0m'\n      // blankLine(true) is xterm/linux behavior\n      const scrollRegionHeight = this._activeBuffer.scrollBottom - this._activeBuffer.scrollTop;\n      this._activeBuffer.lines.shiftElements(this._activeBuffer.ybase + this._activeBuffer.y, scrollRegionHeight, 1);\n      this._activeBuffer.lines.set(this._activeBuffer.ybase + this._activeBuffer.y, this._activeBuffer.getBlankLine(this._eraseAttrData()));\n      this._dirtyRowTracker.markRangeDirty(this._activeBuffer.scrollTop, this._activeBuffer.scrollBottom);\n    } else {\n      this._activeBuffer.y--;\n      this._restrictCursor(); // quickfix to not run out of bounds\n    }\n    return true;\n  }\n\n  /**\n   * ESC c\n   *   DEC mnemonic: RIS (https://vt100.net/docs/vt510-rm/RIS.html)\n   *   Reset to initial state.\n   */\n  public fullReset(): boolean {\n    this._parser.reset();\n    this._onRequestReset.fire();\n    return true;\n  }\n\n  public reset(): void {\n    this._curAttrData = DEFAULT_ATTR_DATA.clone();\n    this._eraseAttrDataInternal = DEFAULT_ATTR_DATA.clone();\n  }\n\n  /**\n   * back_color_erase feature for xterm.\n   */\n  private _eraseAttrData(): IAttributeData {\n    this._eraseAttrDataInternal.bg &= ~(Attributes.CM_MASK | 0xFFFFFF);\n    this._eraseAttrDataInternal.bg |= this._curAttrData.bg & ~0xFC000000;\n    return this._eraseAttrDataInternal;\n  }\n\n  /**\n   * ESC n\n   * ESC o\n   * ESC |\n   * ESC }\n   * ESC ~\n   *   DEC mnemonic: LS (https://vt100.net/docs/vt510-rm/LS.html)\n   *   When you use a locking shift, the character set remains in GL or GR until\n   *   you use another locking shift. (partly supported)\n   */\n  public setgLevel(level: number): boolean {\n    this._charsetService.setgLevel(level);\n    return true;\n  }\n\n  /**\n   * ESC # 8\n   *   DEC mnemonic: DECALN (https://vt100.net/docs/vt510-rm/DECALN.html)\n   *   This control function fills the complete screen area with\n   *   a test pattern (E) used for adjusting screen alignment.\n   *\n   * @vt: #Y   ESC   DECALN   \"Screen Alignment Pattern\"  \"ESC # 8\"  \"Fill viewport with a test pattern (E).\"\n   */\n  public screenAlignmentPattern(): boolean {\n    // prepare cell data\n    const cell = new CellData();\n    cell.content = 1 << Content.WIDTH_SHIFT | 'E'.charCodeAt(0);\n    cell.fg = this._curAttrData.fg;\n    cell.bg = this._curAttrData.bg;\n\n\n    this._setCursor(0, 0);\n    for (let yOffset = 0; yOffset < this._bufferService.rows; ++yOffset) {\n      const row = this._activeBuffer.ybase + this._activeBuffer.y + yOffset;\n      const line = this._activeBuffer.lines.get(row);\n      if (line) {\n        line.fill(cell);\n        line.isWrapped = false;\n      }\n    }\n    this._dirtyRowTracker.markAllDirty();\n    this._setCursor(0, 0);\n    return true;\n  }\n\n\n  /**\n   * DCS $ q Pt ST\n   *   DECRQSS (https://vt100.net/docs/vt510-rm/DECRQSS.html)\n   *   Request Status String (DECRQSS), VT420 and up.\n   *   Response: DECRPSS (https://vt100.net/docs/vt510-rm/DECRPSS.html)\n   *\n   * @vt: #P[Limited support, see below.]  DCS   DECRQSS   \"Request Selection or Setting\"  \"DCS $ q Pt ST\"   \"Request several terminal settings.\"\n   * Response is in the form `ESC P 1 $ r Pt ST` for valid requests, where `Pt` contains the\n   * corresponding CSI string, `ESC P 0 ST` for invalid requests.\n   *\n   * Supported requests and responses:\n   *\n   * | Type                             | Request           | Response (`Pt`)                                       |\n   * | -------------------------------- | ----------------- | ----------------------------------------------------- |\n   * | Graphic Rendition (SGR)          | `DCS $ q m ST`    | always reporting `0m` (currently broken)              |\n   * | Top and Bottom Margins (DECSTBM) | `DCS $ q r ST`    | `Ps ; Ps r`                                           |\n   * | Cursor Style (DECSCUSR)          | `DCS $ q SP q ST` | `Ps SP q`                                             |\n   * | Protection Attribute (DECSCA)    | `DCS $ q \" q ST`  | `Ps \" q` (DECSCA 2 is reported as Ps = 0)             |\n   * | Conformance Level (DECSCL)       | `DCS $ q \" p ST`  | always reporting `61 ; 1 \" p` (DECSCL is unsupported) |\n   *\n   *\n   * TODO:\n   * - fix SGR report\n   * - either check which conformance is better suited or remove the report completely\n   *   --> we are currently a mixture of all up to VT400 but dont follow anyone strictly\n   */\n  public requestStatusString(data: string, params: IParams): boolean {\n    const f = (s: string): boolean => {\n      this._coreService.triggerDataEvent(`${C0.ESC}${s}${C0.ESC}\\\\`);\n      return true;\n    };\n\n    // access helpers\n    const b = this._bufferService.buffer;\n    const opts = this._optionsService.rawOptions;\n    const STYLES: { [key: string]: number } = { 'block': 2, 'underline': 4, 'bar': 6 };\n\n    if (data === '\"q') return f(`P1$r${this._curAttrData.isProtected() ? 1 : 0}\"q`);\n    if (data === '\"p') return f(`P1$r61;1\"p`);\n    if (data === 'r') return f(`P1$r${b.scrollTop + 1};${b.scrollBottom + 1}r`);\n    // FIXME: report real SGR settings instead of 0m\n    if (data === 'm') return f(`P1$r0m`);\n    if (data === ' q') return f(`P1$r${STYLES[opts.cursorStyle] - (opts.cursorBlink ? 1 : 0)} q`);\n    return f(`P0$r`);\n  }\n\n  public markRangeDirty(y1: number, y2: number): void {\n    this._dirtyRowTracker.markRangeDirty(y1, y2);\n  }\n}\n\nexport interface IDirtyRowTracker {\n  readonly start: number;\n  readonly end: number;\n\n  clearRange(): void;\n  markDirty(y: number): void;\n  markRangeDirty(y1: number, y2: number): void;\n  markAllDirty(): void;\n}\n\nclass DirtyRowTracker implements IDirtyRowTracker {\n  public start!: number;\n  public end!: number;\n\n  constructor(\n    @IBufferService private readonly _bufferService: IBufferService\n  ) {\n    this.clearRange();\n  }\n\n  public clearRange(): void {\n    this.start = this._bufferService.buffer.y;\n    this.end = this._bufferService.buffer.y;\n  }\n\n  public markDirty(y: number): void {\n    if (y < this.start) {\n      this.start = y;\n    } else if (y > this.end) {\n      this.end = y;\n    }\n  }\n\n  public markRangeDirty(y1: number, y2: number): void {\n    if (y1 > y2) {\n      $temp = y1;\n      y1 = y2;\n      y2 = $temp;\n    }\n    if (y1 < this.start) {\n      this.start = y1;\n    }\n    if (y2 > this.end) {\n      this.end = y2;\n    }\n  }\n\n  public markAllDirty(): void {\n    this.markRangeDirty(0, this._bufferService.rows - 1);\n  }\n}\n\nexport function isValidColorIndex(value: number): value is ColorIndex {\n  return 0 <= value && value < 256;\n}\n", "\n/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { Disposable } from 'vs/base/common/lifecycle';\nimport { Emitter } from 'vs/base/common/event';\n\ndeclare const setTimeout: (handler: () => void, timeout?: number) => void;\n\n/**\n * Safety watermark to avoid memory exhaustion and browser engine crash on fast data input.\n * Enable flow control to avoid this limit and make sure that your backend correctly\n * propagates this to the underlying pty. (see docs for further instructions)\n * Since this limit is meant as a safety parachute to prevent browser crashs,\n * it is set to a very high number. Typically xterm.js gets unresponsive with\n * a 100 times lower number (>500 kB).\n */\nconst DISCARD_WATERMARK = 50000000; // ~50 MB\n\n/**\n * The max number of ms to spend on writes before allowing the renderer to\n * catch up with a 0ms setTimeout. A value of < 33 to keep us close to\n * 30fps, and a value of < 16 to try to run at 60fps. Of course, the real FPS\n * depends on the time it takes for the renderer to draw the frame.\n */\nconst WRITE_TIMEOUT_MS = 12;\n\n/**\n * Threshold of max held chunks in the write buffer, that were already processed.\n * This is a tradeoff between extensive write buffer shifts (bad runtime) and high\n * memory consumption by data thats not used anymore.\n */\nconst WRITE_BUFFER_LENGTH_THRESHOLD = 50;\n\nexport class WriteBuffer extends Disposable {\n  private _writeBuffer: (string | Uint8Array)[] = [];\n  private _callbacks: ((() => void) | undefined)[] = [];\n  private _pendingData = 0;\n  private _bufferOffset = 0;\n  private _isSyncWriting = false;\n  private _syncCalls = 0;\n  private _didUserInput = false;\n\n  private readonly _onWriteParsed = this._register(new Emitter<void>());\n  public readonly onWriteParsed = this._onWriteParsed.event;\n\n  constructor(private _action: (data: string | Uint8Array, promiseResult?: boolean) => void | Promise<boolean>) {\n    super();\n  }\n\n  public handleUserInput(): void {\n    this._didUserInput = true;\n  }\n\n  /**\n   * @deprecated Unreliable, to be removed soon.\n   */\n  public writeSync(data: string | Uint8Array, maxSubsequentCalls?: number): void {\n    // stop writeSync recursions with maxSubsequentCalls argument\n    // This is dangerous to use as it will lose the current data chunk\n    // and return immediately.\n    if (maxSubsequentCalls !== undefined && this._syncCalls > maxSubsequentCalls) {\n      // comment next line if a whole loop block should only contain x `writeSync` calls\n      // (total flat vs. deep nested limit)\n      this._syncCalls = 0;\n      return;\n    }\n    // append chunk to buffer\n    this._pendingData += data.length;\n    this._writeBuffer.push(data);\n    this._callbacks.push(undefined);\n\n    // increase recursion counter\n    this._syncCalls++;\n    // exit early if another writeSync loop is active\n    if (this._isSyncWriting) {\n      return;\n    }\n    this._isSyncWriting = true;\n\n    // force sync processing on pending data chunks to avoid in-band data scrambling\n    // does the same as innerWrite but without event loop\n    // we have to do it here as single loop steps to not corrupt loop subject\n    // by another writeSync call triggered from _action\n    let chunk: string | Uint8Array | undefined;\n    while (chunk = this._writeBuffer.shift()) {\n      this._action(chunk);\n      const cb = this._callbacks.shift();\n      if (cb) cb();\n    }\n    // reset to avoid reprocessing of chunks with scheduled innerWrite call\n    // stopping scheduled innerWrite by offset > length condition\n    this._pendingData = 0;\n    this._bufferOffset = 0x7FFFFFFF;\n\n    // allow another writeSync to loop\n    this._isSyncWriting = false;\n    this._syncCalls = 0;\n  }\n\n  public write(data: string | Uint8Array, callback?: () => void): void {\n    if (this._pendingData > DISCARD_WATERMARK) {\n      throw new Error('write data discarded, use flow control to avoid losing data');\n    }\n\n    // schedule chunk processing for next event loop run\n    if (!this._writeBuffer.length) {\n      this._bufferOffset = 0;\n\n      // If this is the first write call after the user has done some input,\n      // parse it immediately to minimize input latency,\n      // otherwise schedule for the next event\n      if (this._didUserInput) {\n        this._didUserInput = false;\n        this._pendingData += data.length;\n        this._writeBuffer.push(data);\n        this._callbacks.push(callback);\n        this._innerWrite();\n        return;\n      }\n\n      setTimeout(() => this._innerWrite());\n    }\n\n    this._pendingData += data.length;\n    this._writeBuffer.push(data);\n    this._callbacks.push(callback);\n  }\n\n  /**\n   * Inner write call, that enters the sliced chunk processing by timing.\n   *\n   * `lastTime` indicates, when the last _innerWrite call had started.\n   * It is used to aggregate async handler execution under a timeout constraint\n   * effectively lowering the redrawing needs, schematically:\n   *\n   *   macroTask _innerWrite:\n   *     if (Date.now() - (lastTime | 0) < WRITE_TIMEOUT_MS):\n   *        schedule microTask _innerWrite(lastTime)\n   *     else:\n   *        schedule macroTask _innerWrite(0)\n   *\n   *   overall execution order on task queues:\n   *\n   *   macrotasks:  [...]  -->  _innerWrite(0)  -->  [...]  -->  screenUpdate  -->  [...]\n   *         m  t:                    |\n   *         i  a:                  [...]\n   *         c  s:                    |\n   *         r  k:              while < timeout:\n   *         o  s:                _innerWrite(timeout)\n   *\n   * `promiseResult` depicts the promise resolve value of an async handler.\n   * This value gets carried forward through all saved stack states of the\n   * paused parser for proper continuation.\n   *\n   * Note, for pure sync code `lastTime` and `promiseResult` have no meaning.\n   */\n  protected _innerWrite(lastTime: number = 0, promiseResult: boolean = true): void {\n    const startTime = lastTime || Date.now();\n    while (this._writeBuffer.length > this._bufferOffset) {\n      const data = this._writeBuffer[this._bufferOffset];\n      const result = this._action(data, promiseResult);\n      if (result) {\n        /**\n         * If we get a promise as return value, we re-schedule the continuation\n         * as thenable on the promise and exit right away.\n         *\n         * The exit here means, that we block input processing at the current active chunk,\n         * the exact execution position within the chunk is preserved by the saved\n         * stack content in InputHandler and EscapeSequenceParser.\n         *\n         * Resuming happens automatically from that saved stack state.\n         * Also the resolved promise value is passed along the callstack to\n         * `EscapeSequenceParser.parse` to correctly resume the stopped handler loop.\n         *\n         * Exceptions on async handlers will be logged to console async, but do not interrupt\n         * the input processing (continues with next handler at the current input position).\n         */\n\n        /**\n         * If a promise takes long to resolve, we should schedule continuation behind setTimeout.\n         * This might already be too late, if our .then enters really late (executor + prev thens\n         * took very long). This cannot be solved here for the handler itself (it is the handlers\n         * responsibility to slice hard work), but we can at least schedule a screen update as we\n         * gain control.\n         */\n        const continuation: (r: boolean) => void = (r: boolean) => Date.now() - startTime >= WRITE_TIMEOUT_MS\n          ? setTimeout(() => this._innerWrite(0, r))\n          : this._innerWrite(startTime, r);\n\n        /**\n         * Optimization considerations:\n         * The continuation above favors FPS over throughput by eval'ing `startTime` on resolve.\n         * This might schedule too many screen updates with bad throughput drops (in case a slow\n         * resolving handler sliced its work properly behind setTimeout calls). We cannot spot\n         * this condition here, also the renderer has no way to spot nonsense updates either.\n         * FIXME: A proper fix for this would track the FPS at the renderer entry level separately.\n         *\n         * If favoring of FPS shows bad throughtput impact, use the following instead. It favors\n         * throughput by eval'ing `startTime` upfront pulling at least one more chunk into the\n         * current microtask queue (executed before setTimeout).\n         */\n        // const continuation: (r: boolean) => void = Date.now() - startTime >= WRITE_TIMEOUT_MS\n        //   ? r => setTimeout(() => this._innerWrite(0, r))\n        //   : r => this._innerWrite(startTime, r);\n\n        // Handle exceptions synchronously to current band position, idea:\n        // 1. spawn a single microtask which we allow to throw hard\n        // 2. spawn a promise immediately resolving to `true`\n        // (executed on the same queue, thus properly aligned before continuation happens)\n        result.catch(err => {\n          queueMicrotask(() => {throw err;});\n          return Promise.resolve(false);\n        }).then(continuation);\n        return;\n      }\n\n      const cb = this._callbacks[this._bufferOffset];\n      if (cb) cb();\n      this._bufferOffset++;\n      this._pendingData -= data.length;\n\n      if (Date.now() - startTime >= WRITE_TIMEOUT_MS) {\n        break;\n      }\n    }\n    if (this._writeBuffer.length > this._bufferOffset) {\n      // Allow renderer to catch up before processing the next batch\n      // trim already processed chunks if we are above threshold\n      if (this._bufferOffset > WRITE_BUFFER_LENGTH_THRESHOLD) {\n        this._writeBuffer = this._writeBuffer.slice(this._bufferOffset);\n        this._callbacks = this._callbacks.slice(this._bufferOffset);\n        this._bufferOffset = 0;\n      }\n      setTimeout(() => this._innerWrite());\n    } else {\n      this._writeBuffer.length = 0;\n      this._callbacks.length = 0;\n      this._pendingData = 0;\n      this._bufferOffset = 0;\n    }\n    this._onWriteParsed.fire();\n  }\n}\n", "/**\n * Copyright (c) 2022 The xterm.js authors. All rights reserved.\n * @license MIT\n */\nimport { IBufferService, IOscLinkService } from 'common/services/Services';\nimport { IMarker, IOscLinkData } from 'common/Types';\n\nexport class OscLinkService implements IOscLinkService {\n  public serviceBrand: any;\n\n  private _nextId = 1;\n\n  /**\n   * A map of the link key to link entry. This is used to add additional lines to links with ids.\n   */\n  private _entriesWithId: Map<string, IOscLinkEntryWithId> = new Map();\n\n  /**\n   * A map of the link id to the link entry. The \"link id\" (number) which is the numberic\n   * representation of a unique link should not be confused with \"id\" (string) which comes in with\n   * `id=` in the OSC link's properties.\n   */\n  private _dataByLinkId: Map<number, IOscLinkEntryNoId | IOscLinkEntryWithId> = new Map();\n\n  constructor(\n    @IBufferService private readonly _bufferService: IBufferService\n  ) {\n  }\n\n  public registerLink(data: IOscLinkData): number {\n    const buffer = this._bufferService.buffer;\n\n    // Links with no id will only ever be registered a single time\n    if (data.id === undefined) {\n      const marker = buffer.addMarker(buffer.ybase + buffer.y);\n      const entry: IOscLinkEntryNoId = {\n        data,\n        id: this._nextId++,\n        lines: [marker]\n      };\n      marker.onDispose(() => this._removeMarkerFromLink(entry, marker));\n      this._dataByLinkId.set(entry.id, entry);\n      return entry.id;\n    }\n\n    // Add the line to the link if it already exists\n    const castData = data as Required<IOscLinkData>;\n    const key = this._getEntryIdKey(castData);\n    const match = this._entriesWithId.get(key);\n    if (match) {\n      this.addLineToLink(match.id, buffer.ybase + buffer.y);\n      return match.id;\n    }\n\n    // Create the link\n    const marker = buffer.addMarker(buffer.ybase + buffer.y);\n    const entry: IOscLinkEntryWithId = {\n      id: this._nextId++,\n      key: this._getEntryIdKey(castData),\n      data: castData,\n      lines: [marker]\n    };\n    marker.onDispose(() => this._removeMarkerFromLink(entry, marker));\n    this._entriesWithId.set(entry.key, entry);\n    this._dataByLinkId.set(entry.id, entry);\n    return entry.id;\n  }\n\n  public addLineToLink(linkId: number, y: number): void {\n    const entry = this._dataByLinkId.get(linkId);\n    if (!entry) {\n      return;\n    }\n    if (entry.lines.every(e => e.line !== y)) {\n      const marker = this._bufferService.buffer.addMarker(y);\n      entry.lines.push(marker);\n      marker.onDispose(() => this._removeMarkerFromLink(entry, marker));\n    }\n  }\n\n  public getLinkData(linkId: number): IOscLinkData | undefined {\n    return this._dataByLinkId.get(linkId)?.data;\n  }\n\n  private _getEntryIdKey(linkData: Required<IOscLinkData>): string {\n    return `${linkData.id};;${linkData.uri}`;\n  }\n\n  private _removeMarkerFromLink(entry: IOscLinkEntryNoId | IOscLinkEntryWithId, marker: IMarker): void {\n    const index = entry.lines.indexOf(marker);\n    if (index === -1) {\n      return;\n    }\n    entry.lines.splice(index, 1);\n    if (entry.lines.length === 0) {\n      if (entry.data.id !== undefined) {\n        this._entriesWithId.delete((entry as IOscLinkEntryWithId).key);\n      }\n      this._dataByLinkId.delete(entry.id);\n    }\n  }\n}\n\ninterface IOscLinkEntry<T extends IOscLinkData> {\n  data: T;\n  id: number;\n  lines: IMarker[];\n}\n\ninterface IOscLinkEntryNoId extends IOscLinkEntry<IOscLinkData> {\n}\n\ninterface IOscLinkEntryWithId extends IOscLinkEntry<Required<IOscLinkData>> {\n  key: string;\n}\n", "/**\n * Copyright (c) 2014-2020 The xterm.js authors. All rights reserved.\n * Copyright (c) 2012-2013, Christopher Jeffrey (MIT License)\n * @license MIT\n *\n * Originally forked from (with the author's permission):\n *   Fabrice Bellard's javascript vt100 for jslinux:\n *   http://bellard.org/jslinux/\n *   Copyright (c) 2011 Fabrice Bellard\n *   The original design remains. The terminal itself\n *   has been extended to include xterm CSI codes, among\n *   other features.\n *\n * Terminal Emulation References:\n *   http://vt100.net/\n *   http://invisible-island.net/xterm/ctlseqs/ctlseqs.txt\n *   http://invisible-island.net/xterm/ctlseqs/ctlseqs.html\n *   http://invisible-island.net/vttest/\n *   http://www.inwap.com/pdp10/ansicode.txt\n *   http://linux.die.net/man/4/console_codes\n *   http://linux.die.net/man/7/urxvt\n */\n\nimport { IInstantiationService, IOptionsService, IBufferService, ILogService, ICharsetService, ICoreService, ICoreMouseService, IUnicodeService, LogLevelEnum, ITerminalOptions, IOscLinkService } from 'common/services/Services';\nimport { InstantiationService } from 'common/services/InstantiationService';\nimport { LogService } from 'common/services/LogService';\nimport { BufferService, MINIMUM_COLS, MINIMUM_ROWS } from 'common/services/BufferService';\nimport { OptionsService } from 'common/services/OptionsService';\nimport { IDisposable, IAttributeData, ICoreTerminal, IScrollEvent } from 'common/Types';\nimport { CoreService } from 'common/services/CoreService';\nimport { CoreMouseService } from 'common/services/CoreMouseService';\nimport { UnicodeService } from 'common/services/UnicodeService';\nimport { CharsetService } from 'common/services/CharsetService';\nimport { updateWindowsModeWrappedState } from 'common/WindowsMode';\nimport { IFunctionIdentifier, IParams } from 'common/parser/Types';\nimport { IBufferSet } from 'common/buffer/Types';\nimport { InputHandler } from 'common/InputHandler';\nimport { WriteBuffer } from 'common/input/WriteBuffer';\nimport { OscLinkService } from 'common/services/OscLinkService';\nimport { Emitter, Event } from 'vs/base/common/event';\nimport { Disposable, MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';\n\n// Only trigger this warning a single time per session\nlet hasWriteSyncWarnHappened = false;\n\nexport abstract class CoreTerminal extends Disposable implements ICoreTerminal {\n  protected readonly _instantiationService: IInstantiationService;\n  protected readonly _bufferService: IBufferService;\n  protected readonly _logService: ILogService;\n  protected readonly _charsetService: ICharsetService;\n  protected readonly _oscLinkService: IOscLinkService;\n\n  public readonly coreMouseService: ICoreMouseService;\n  public readonly coreService: ICoreService;\n  public readonly unicodeService: IUnicodeService;\n  public readonly optionsService: IOptionsService;\n\n  protected _inputHandler: InputHandler;\n  private _writeBuffer: WriteBuffer;\n  private _windowsWrappingHeuristics = this._register(new MutableDisposable());\n\n  private readonly _onBinary = this._register(new Emitter<string>());\n  public readonly onBinary = this._onBinary.event;\n  private readonly _onData = this._register(new Emitter<string>());\n  public readonly onData = this._onData.event;\n  protected _onLineFeed = this._register(new Emitter<void>());\n  public readonly onLineFeed = this._onLineFeed.event;\n  private readonly _onResize = this._register(new Emitter<{ cols: number, rows: number }>());\n  public readonly onResize = this._onResize.event;\n  protected readonly _onWriteParsed = this._register(new Emitter<void>());\n  public readonly onWriteParsed = this._onWriteParsed.event;\n\n  /**\n   * Internally we track the source of the scroll but this is meaningless outside the library so\n   * it's filtered out.\n   */\n  protected _onScrollApi?: Emitter<number>;\n  protected _onScroll = this._register(new Emitter<IScrollEvent>());\n  public get onScroll(): Event<number> {\n    if (!this._onScrollApi) {\n      this._onScrollApi = this._register(new Emitter<number>());\n      this._onScroll.event(ev => {\n        this._onScrollApi?.fire(ev.position);\n      });\n    }\n    return this._onScrollApi.event;\n  }\n\n  public get cols(): number { return this._bufferService.cols; }\n  public get rows(): number { return this._bufferService.rows; }\n  public get buffers(): IBufferSet { return this._bufferService.buffers; }\n  public get options(): Required<ITerminalOptions> { return this.optionsService.options; }\n  public set options(options: ITerminalOptions) {\n    for (const key in options) {\n      this.optionsService.options[key] = options[key];\n    }\n  }\n\n  constructor(\n    options: Partial<ITerminalOptions>\n  ) {\n    super();\n\n    // Setup and initialize services\n    this._instantiationService = new InstantiationService();\n    this.optionsService = this._register(new OptionsService(options));\n    this._instantiationService.setService(IOptionsService, this.optionsService);\n    this._bufferService = this._register(this._instantiationService.createInstance(BufferService));\n    this._instantiationService.setService(IBufferService, this._bufferService);\n    this._logService = this._register(this._instantiationService.createInstance(LogService));\n    this._instantiationService.setService(ILogService, this._logService);\n    this.coreService = this._register(this._instantiationService.createInstance(CoreService));\n    this._instantiationService.setService(ICoreService, this.coreService);\n    this.coreMouseService = this._register(this._instantiationService.createInstance(CoreMouseService));\n    this._instantiationService.setService(ICoreMouseService, this.coreMouseService);\n    this.unicodeService = this._register(this._instantiationService.createInstance(UnicodeService));\n    this._instantiationService.setService(IUnicodeService, this.unicodeService);\n    this._charsetService = this._instantiationService.createInstance(CharsetService);\n    this._instantiationService.setService(ICharsetService, this._charsetService);\n    this._oscLinkService = this._instantiationService.createInstance(OscLinkService);\n    this._instantiationService.setService(IOscLinkService, this._oscLinkService);\n\n\n    // Register input handler and handle/forward events\n    this._inputHandler = this._register(new InputHandler(this._bufferService, this._charsetService, this.coreService, this._logService, this.optionsService, this._oscLinkService, this.coreMouseService, this.unicodeService));\n    this._register(Event.forward(this._inputHandler.onLineFeed, this._onLineFeed));\n    this._register(this._inputHandler);\n\n    // Setup listeners\n    this._register(Event.forward(this._bufferService.onResize, this._onResize));\n    this._register(Event.forward(this.coreService.onData, this._onData));\n    this._register(Event.forward(this.coreService.onBinary, this._onBinary));\n    this._register(this.coreService.onRequestScrollToBottom(() => this.scrollToBottom(true)));\n    this._register(this.coreService.onUserInput(() =>  this._writeBuffer.handleUserInput()));\n    this._register(this.optionsService.onMultipleOptionChange(['windowsMode', 'windowsPty'], () => this._handleWindowsPtyOptionChange()));\n    this._register(this._bufferService.onScroll(() => {\n      this._onScroll.fire({ position: this._bufferService.buffer.ydisp });\n      this._inputHandler.markRangeDirty(this._bufferService.buffer.scrollTop, this._bufferService.buffer.scrollBottom);\n    }));\n    // Setup WriteBuffer\n    this._writeBuffer = this._register(new WriteBuffer((data, promiseResult) => this._inputHandler.parse(data, promiseResult)));\n    this._register(Event.forward(this._writeBuffer.onWriteParsed, this._onWriteParsed));\n  }\n\n  public write(data: string | Uint8Array, callback?: () => void): void {\n    this._writeBuffer.write(data, callback);\n  }\n\n  /**\n   * Write data to terminal synchonously.\n   *\n   * This method is unreliable with async parser handlers, thus should not\n   * be used anymore. If you need blocking semantics on data input consider\n   * `write` with a callback instead.\n   *\n   * @deprecated Unreliable, will be removed soon.\n   */\n  public writeSync(data: string | Uint8Array, maxSubsequentCalls?: number): void {\n    if (this._logService.logLevel <= LogLevelEnum.WARN && !hasWriteSyncWarnHappened) {\n      this._logService.warn('writeSync is unreliable and will be removed soon.');\n      hasWriteSyncWarnHappened = true;\n    }\n    this._writeBuffer.writeSync(data, maxSubsequentCalls);\n  }\n\n  public input(data: string, wasUserInput: boolean = true): void {\n    this.coreService.triggerDataEvent(data, wasUserInput);\n  }\n\n  public resize(x: number, y: number): void {\n    if (isNaN(x) || isNaN(y)) {\n      return;\n    }\n\n    x = Math.max(x, MINIMUM_COLS);\n    y = Math.max(y, MINIMUM_ROWS);\n\n    this._bufferService.resize(x, y);\n  }\n\n  /**\n   * Scroll the terminal down 1 row, creating a blank line.\n   * @param eraseAttr The attribute data to use the for blank line.\n   * @param isWrapped Whether the new line is wrapped from the previous line.\n   */\n  public scroll(eraseAttr: IAttributeData, isWrapped: boolean = false): void {\n    this._bufferService.scroll(eraseAttr, isWrapped);\n  }\n\n  /**\n   * Scroll the display of the terminal\n   * @param disp The number of lines to scroll down (negative scroll up).\n   * @param suppressScrollEvent Don't emit the scroll event as scrollLines. This is used to avoid\n   * unwanted events being handled by the viewport when the event was triggered from the viewport\n   * originally.\n   */\n  public scrollLines(disp: number, suppressScrollEvent?: boolean): void {\n    this._bufferService.scrollLines(disp, suppressScrollEvent);\n  }\n\n  public scrollPages(pageCount: number): void {\n    this.scrollLines(pageCount * (this.rows - 1));\n  }\n\n  public scrollToTop(): void {\n    this.scrollLines(-this._bufferService.buffer.ydisp);\n  }\n\n  public scrollToBottom(disableSmoothScroll?: boolean): void {\n    this.scrollLines(this._bufferService.buffer.ybase - this._bufferService.buffer.ydisp);\n  }\n\n  public scrollToLine(line: number): void {\n    const scrollAmount = line - this._bufferService.buffer.ydisp;\n    if (scrollAmount !== 0) {\n      this.scrollLines(scrollAmount);\n    }\n  }\n\n  /** Add handler for ESC escape sequence. See xterm.d.ts for details. */\n  public registerEscHandler(id: IFunctionIdentifier, callback: () => boolean | Promise<boolean>): IDisposable {\n    return this._inputHandler.registerEscHandler(id, callback);\n  }\n\n  /** Add handler for DCS escape sequence. See xterm.d.ts for details. */\n  public registerDcsHandler(id: IFunctionIdentifier, callback: (data: string, param: IParams) => boolean | Promise<boolean>): IDisposable {\n    return this._inputHandler.registerDcsHandler(id, callback);\n  }\n\n  /** Add handler for CSI escape sequence. See xterm.d.ts for details. */\n  public registerCsiHandler(id: IFunctionIdentifier, callback: (params: IParams) => boolean | Promise<boolean>): IDisposable {\n    return this._inputHandler.registerCsiHandler(id, callback);\n  }\n\n  /** Add handler for OSC escape sequence. See xterm.d.ts for details. */\n  public registerOscHandler(ident: number, callback: (data: string) => boolean | Promise<boolean>): IDisposable {\n    return this._inputHandler.registerOscHandler(ident, callback);\n  }\n\n  protected _setup(): void {\n    this._handleWindowsPtyOptionChange();\n  }\n\n  public reset(): void {\n    this._inputHandler.reset();\n    this._bufferService.reset();\n    this._charsetService.reset();\n    this.coreService.reset();\n    this.coreMouseService.reset();\n  }\n\n\n  private _handleWindowsPtyOptionChange(): void {\n    let value = false;\n    const windowsPty = this.optionsService.rawOptions.windowsPty;\n    if (windowsPty && windowsPty.buildNumber !== undefined && windowsPty.buildNumber !== undefined) {\n      value = !!(windowsPty.backend === 'conpty' && windowsPty.buildNumber < 21376);\n    } else if (this.optionsService.rawOptions.windowsMode) {\n      value = true;\n    }\n    if (value) {\n      this._enableWindowsWrappingHeuristics();\n    } else {\n      this._windowsWrappingHeuristics.clear();\n    }\n  }\n\n  protected _enableWindowsWrappingHeuristics(): void {\n    if (!this._windowsWrappingHeuristics.value) {\n      const disposables: IDisposable[] = [];\n      disposables.push(this.onLineFeed(updateWindowsModeWrappedState.bind(null, this._bufferService)));\n      disposables.push(this.registerCsiHandler({ final: 'H' }, () => {\n        updateWindowsModeWrappedState(this._bufferService);\n        return false;\n      }));\n      this._windowsWrappingHeuristics.value = toDisposable(() => {\n        for (const d of disposables) {\n          d.dispose();\n        }\n      });\n    }\n  }\n}\n", "/**\n * Copyright (c) 2014 The xterm.js authors. All rights reserved.\n * Copyright (c) 2012-2013, Christopher Jeffrey (MIT License)\n * @license MIT\n *\n * Originally forked from (with the author's permission):\n *   Fabrice Bellard's javascript vt100 for jslinux:\n *   http://bellard.org/jslinux/\n *   Copyright (c) 2011 Fabrice Bellard\n *   The original design remains. The terminal itself\n *   has been extended to include xterm CSI codes, among\n *   other features.\n *\n * Terminal Emulation References:\n *   http://vt100.net/\n *   http://invisible-island.net/xterm/ctlseqs/ctlseqs.txt\n *   http://invisible-island.net/xterm/ctlseqs/ctlseqs.html\n *   http://invisible-island.net/vttest/\n *   http://www.inwap.com/pdp10/ansicode.txt\n *   http://linux.die.net/man/4/console_codes\n *   http://linux.die.net/man/7/urxvt\n */\n\nimport { DEFAULT_ATTR_DATA } from 'common/buffer/BufferLine';\nimport { IBuffer } from 'common/buffer/Types';\nimport { CoreTerminal } from 'common/CoreTerminal';\nimport { IMarker, ITerminalOptions } from 'common/Types';\nimport { Emitter, Event } from 'vs/base/common/event';\n\nexport class Terminal extends CoreTerminal {\n  private readonly _onBell = this._register(new Emitter<void>());\n  public readonly onBell = this._onBell.event;\n  private readonly _onCursorMove = this._register(new Emitter<void>());\n  public readonly onCursorMove = this._onCursorMove.event;\n  private readonly _onTitleChange = this._register(new Emitter<string>());\n  public readonly onTitleChange = this._onTitleChange.event;\n  private readonly _onA11yCharEmitter = this._register(new Emitter<string>());\n  public readonly onA11yChar = this._onA11yCharEmitter.event;\n  private readonly _onA11yTabEmitter = this._register(new Emitter<number>());\n  public readonly onA11yTab = this._onA11yTabEmitter.event;\n\n  constructor(\n    options: ITerminalOptions = {}\n  ) {\n    super(options);\n\n    this._setup();\n\n    // Setup InputHandler listeners\n    this._register(this._inputHandler.onRequestBell(() => this.bell()));\n    this._register(this._inputHandler.onRequestReset(() => this.reset()));\n    this._register(Event.forward(this._inputHandler.onCursorMove, this._onCursorMove));\n    this._register(Event.forward(this._inputHandler.onTitleChange, this._onTitleChange));\n    this._register(Event.forward(this._inputHandler.onA11yChar, this._onA11yCharEmitter));\n    this._register(Event.forward(this._inputHandler.onA11yTab, this._onA11yTabEmitter));\n  }\n\n  /**\n   * Convenience property to active buffer.\n   */\n  public get buffer(): IBuffer {\n    return this.buffers.active;\n  }\n\n  // TODO: Support paste here?\n\n  public get markers(): IMarker[] {\n    return this.buffer.markers;\n  }\n\n  public addMarker(cursorYOffset: number): IMarker | undefined {\n    // Disallow markers on the alt buffer\n    if (this.buffer !== this.buffers.normal) {\n      return;\n    }\n\n    return this.buffer.addMarker(this.buffer.ybase + this.buffer.y + cursorYOffset);\n  }\n\n  public bell(): void {\n    this._onBell.fire();\n  }\n\n  public input(data: string, wasUserInput: boolean = true): void {\n    this.coreService.triggerDataEvent(data, wasUserInput);\n  }\n\n  /**\n   * Resizes the terminal.\n   *\n   * @param x The number of columns to resize to.\n   * @param y The number of rows to resize to.\n   */\n  public resize(x: number, y: number): void {\n    if (x === this.cols && y === this.rows) {\n      return;\n    }\n\n    super.resize(x, y);\n  }\n\n  /**\n   * Clear the entire buffer, making the prompt line the new first line.\n   */\n  public clear(): void {\n    if (this.buffer.ybase === 0 && this.buffer.y === 0) {\n      // Don't clear if it's already clear\n      return;\n    }\n    this.buffer.lines.set(0, this.buffer.lines.get(this.buffer.ybase + this.buffer.y)!);\n    this.buffer.lines.length = 1;\n    this.buffer.ydisp = 0;\n    this.buffer.ybase = 0;\n    this.buffer.y = 0;\n    for (let i = 1; i < this.rows; i++) {\n      this.buffer.lines.push(this.buffer.getBlankLine(DEFAULT_ATTR_DATA));\n    }\n    this._onScroll.fire({ position: this.buffer.ydisp });\n  }\n\n  /**\n   * Reset terminal.\n   * Note: Calling this directly from JS is synchronous but does not clear\n   * input buffers and does not reset the parser, thus the terminal will\n   * continue to apply pending input data.\n   * If you need in band reset (synchronous with input data) consider\n   * using DECSTR (soft reset, CSI ! p) or RIS instead (hard reset, ESC c).\n   */\n  public reset(): void {\n    /**\n     * Since _setup handles a full terminal creation, we have to carry forward\n     * a few things that should not reset.\n     */\n    this.options.rows = this.rows;\n    this.options.cols = this.cols;\n\n    this._setup();\n    super.reset();\n  }\n}\n", "/**\n * Copyright (c) 2019 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { ITerminalAddon, IDisposable, Terminal } from '@xterm/xterm';\n\nexport interface ILoadedAddon {\n  instance: ITerminalAddon;\n  dispose: () => void;\n  isDisposed: boolean;\n}\n\nexport class AddonManager implements IDisposable {\n  protected _addons: ILoadedAddon[] = [];\n\n  public dispose(): void {\n    for (let i = this._addons.length - 1; i >= 0; i--) {\n      this._addons[i].instance.dispose();\n    }\n  }\n\n  public loadAddon(terminal: Terminal, instance: ITerminalAddon): void {\n    const loadedAddon: ILoadedAddon = {\n      instance,\n      dispose: instance.dispose,\n      isDisposed: false\n    };\n    this._addons.push(loadedAddon);\n    instance.dispose = () => this._wrappedAddonDispose(loadedAddon);\n    instance.activate(terminal as any);\n  }\n\n  private _wrappedAddonDispose(loadedAddon: ILoadedAddon): void {\n    if (loadedAddon.isDisposed) {\n      // Do nothing if already disposed\n      return;\n    }\n    let index = -1;\n    for (let i = 0; i < this._addons.length; i++) {\n      if (this._addons[i] === loadedAddon) {\n        index = i;\n        break;\n      }\n    }\n    if (index === -1) {\n      throw new Error('Could not dispose an addon that has not been loaded');\n    }\n    loadedAddon.isDisposed = true;\n    loadedAddon.dispose.apply(loadedAddon.instance);\n    this._addons.splice(index, 1);\n  }\n}\n", "/**\n * Copyright (c) 2018 The xterm.js authors. All rights reserved.\n * @license MIT\n */\n\nimport { BufferNamespaceApi } from 'common/public/BufferNamespaceApi';\nimport { ParserApi } from 'common/public/ParserApi';\nimport { UnicodeApi } from 'common/public/UnicodeApi';\nimport { IBufferNamespace as IBufferNamespaceApi, IMarker, IModes, IParser, ITerminalAddon, ITerminalInitOnlyOptions, IUnicodeHandling, Terminal as ITerminalApi } from '@xterm/headless';\nimport { Terminal as TerminalCore } from 'headless/Terminal';\nimport { AddonManager } from 'common/public/AddonManager';\nimport { ITerminalOptions } from 'common/Types';\nimport { Disposable } from 'vs/base/common/lifecycle';\nimport type { Event } from 'vs/base/common/event';\n/**\n * The set of options that only have an effect when set in the Terminal constructor.\n */\nconst CONSTRUCTOR_ONLY_OPTIONS = ['cols', 'rows'];\n\nexport class Terminal extends Disposable implements ITerminalApi {\n  private _core: TerminalCore;\n  private _addonManager: AddonManager;\n  private _parser: IParser | undefined;\n  private _buffer: BufferNamespaceApi | undefined;\n  private _publicOptions: Required<ITerminalOptions>;\n\n  constructor(options?: ITerminalOptions & ITerminalInitOnlyOptions) {\n    super();\n\n    this._core = this._register(new TerminalCore(options));\n    this._addonManager = this._register(new AddonManager());\n\n    this._publicOptions = { ... this._core.options };\n    const getter = (propName: string): any => {\n      return this._core.options[propName];\n    };\n    const setter = (propName: string, value: any): void => {\n      this._checkReadonlyOptions(propName);\n      this._core.options[propName] = value;\n    };\n\n    for (const propName in this._core.options) {\n      Object.defineProperty(this._publicOptions, propName, {\n        get: () => {\n          return this._core.options[propName];\n        },\n        set: (value: any) => {\n          this._checkReadonlyOptions(propName);\n          this._core.options[propName] = value;\n        }\n      });\n      const desc = {\n        get: getter.bind(this, propName),\n        set: setter.bind(this, propName)\n      };\n      Object.defineProperty(this._publicOptions, propName, desc);\n    }\n  }\n\n  private _checkReadonlyOptions(propName: string): void {\n    // Throw an error if any constructor only option is modified\n    // from terminal.options\n    // Modifications from anywhere else are allowed\n    if (CONSTRUCTOR_ONLY_OPTIONS.includes(propName)) {\n      throw new Error(`Option \"${propName}\" can only be set in the constructor`);\n    }\n  }\n\n  private _checkProposedApi(): void {\n    if (!this._core.optionsService.options.allowProposedApi) {\n      throw new Error('You must set the allowProposedApi option to true to use proposed API');\n    }\n  }\n\n  public get onBell(): Event<void> { return this._core.onBell; }\n  public get onBinary(): Event<string> { return this._core.onBinary; }\n  public get onCursorMove(): Event<void> { return this._core.onCursorMove; }\n  public get onData(): Event<string> { return this._core.onData; }\n  public get onLineFeed(): Event<void> { return this._core.onLineFeed; }\n  public get onResize(): Event<{ cols: number, rows: number }> { return this._core.onResize; }\n  public get onScroll(): Event<number> { return this._core.onScroll; }\n  public get onTitleChange(): Event<string> { return this._core.onTitleChange; }\n  public get onWriteParsed(): Event<void> { return this._core.onWriteParsed; }\n\n  public get parser(): IParser {\n    this._checkProposedApi();\n    if (!this._parser) {\n      this._parser = new ParserApi(this._core);\n    }\n    return this._parser;\n  }\n  public get unicode(): IUnicodeHandling {\n    this._checkProposedApi();\n    return new UnicodeApi(this._core);\n  }\n  public get rows(): number { return this._core.rows; }\n  public get cols(): number { return this._core.cols; }\n  public get buffer(): IBufferNamespaceApi {\n    this._checkProposedApi();\n    if (!this._buffer) {\n      this._buffer = this._register(new BufferNamespaceApi(this._core));\n    }\n    return this._buffer;\n  }\n  public get markers(): ReadonlyArray<IMarker> {\n    this._checkProposedApi();\n    return this._core.markers;\n  }\n  public get modes(): IModes {\n    const m = this._core.coreService.decPrivateModes;\n    let mouseTrackingMode: 'none' | 'x10' | 'vt200' | 'drag' | 'any' = 'none';\n    switch (this._core.coreMouseService.activeProtocol) {\n      case 'X10': mouseTrackingMode = 'x10'; break;\n      case 'VT200': mouseTrackingMode = 'vt200'; break;\n      case 'DRAG': mouseTrackingMode = 'drag'; break;\n      case 'ANY': mouseTrackingMode = 'any'; break;\n    }\n    return {\n      applicationCursorKeysMode: m.applicationCursorKeys,\n      applicationKeypadMode: m.applicationKeypad,\n      bracketedPasteMode: m.bracketedPasteMode,\n      insertMode: this._core.coreService.modes.insertMode,\n      mouseTrackingMode: mouseTrackingMode,\n      originMode: m.origin,\n      reverseWraparoundMode: m.reverseWraparound,\n      sendFocusMode: m.sendFocus,\n      wraparoundMode: m.wraparound\n    };\n  }\n  public get options(): Required<ITerminalOptions> {\n    return this._publicOptions;\n  }\n  public set options(options: ITerminalOptions) {\n    for (const propName in options) {\n      this._publicOptions[propName] = options[propName];\n    }\n  }\n  public input(data: string, wasUserInput: boolean = true): void {\n    this._core.input(data, wasUserInput);\n  }\n  public resize(columns: number, rows: number): void {\n    this._verifyIntegers(columns, rows);\n    this._core.resize(columns, rows);\n  }\n  public registerMarker(cursorYOffset: number = 0): IMarker | undefined {\n    this._checkProposedApi();\n    this._verifyIntegers(cursorYOffset);\n    return this._core.addMarker(cursorYOffset);\n  }\n  public addMarker(cursorYOffset: number): IMarker | undefined {\n    return this.registerMarker(cursorYOffset);\n  }\n  public dispose(): void {\n    super.dispose();\n  }\n  public scrollLines(amount: number): void {\n    this._verifyIntegers(amount);\n    this._core.scrollLines(amount);\n  }\n  public scrollPages(pageCount: number): void {\n    this._verifyIntegers(pageCount);\n    this._core.scrollPages(pageCount);\n  }\n  public scrollToTop(): void {\n    this._core.scrollToTop();\n  }\n  public scrollToBottom(): void {\n    this._core.scrollToBottom();\n  }\n  public scrollToLine(line: number): void {\n    this._verifyIntegers(line);\n    this._core.scrollToLine(line);\n  }\n  public clear(): void {\n    this._core.clear();\n  }\n  public write(data: string | Uint8Array, callback?: () => void): void {\n    this._core.write(data, callback);\n  }\n  public writeln(data: string | Uint8Array, callback?: () => void): void {\n    this._core.write(data);\n    this._core.write('\\r\\n', callback);\n  }\n  public reset(): void {\n    this._core.reset();\n  }\n  public loadAddon(addon: ITerminalAddon): void {\n    // TODO: This could cause issues if the addon calls renderer apis\n    this._addonManager.loadAddon(this as any, addon);\n  }\n\n  private _verifyIntegers(...values: number[]): void {\n    for (const value of values) {\n      if (value === Infinity || isNaN(value) || value % 1 !== 0) {\n        throw new Error('This API only accepts integers');\n      }\n    }\n  }\n}\n"],
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}