fabric/dist/src/shapes/IText/IText.min.mjs.map

Object model for HTML5 canvas, and SVG-to-canvas parser. Backed by jsdom and node-canvas.

{"version":3,"file":"IText.min.mjs","sources":["../../../../src/shapes/IText/IText.ts"],"sourcesContent":["import { Canvas } from '../../canvas/Canvas';\nimport type { ITextEvents } from './ITextBehavior';\nimport { ITextClickBehavior } from './ITextClickBehavior';\nimport {\n  ctrlKeysMapDown,\n  ctrlKeysMapUp,\n  keysMap,\n  keysMapRtl,\n} from './constants';\nimport type { TClassProperties, TFiller, TOptions } from '../../typedefs';\nimport { classRegistry } from '../../ClassRegistry';\nimport type { SerializedTextProps, TextProps } from '../Text/Text';\nimport {\n  JUSTIFY,\n  JUSTIFY_CENTER,\n  JUSTIFY_LEFT,\n  JUSTIFY_RIGHT,\n} from '../Text/constants';\nimport { CENTER, FILL, LEFT, RIGHT } from '../../constants';\nimport type { ObjectToCanvasElementOptions } from '../Object/Object';\n\ntype CursorBoundaries = {\n  left: number;\n  top: number;\n  leftOffset: number;\n  topOffset: number;\n};\n\n// Declare IText protected properties to workaround TS\nconst protectedDefaultValues = {\n  _selectionDirection: null,\n  _reSpace: /\\s|\\r?\\n/,\n  inCompositionMode: false,\n};\n\nexport const iTextDefaultValues: Partial<TClassProperties<IText>> = {\n  selectionStart: 0,\n  selectionEnd: 0,\n  selectionColor: 'rgba(17,119,255,0.3)',\n  isEditing: false,\n  editable: true,\n  editingBorderColor: 'rgba(102,153,255,0.25)',\n  cursorWidth: 2,\n  cursorColor: '',\n  cursorDelay: 1000,\n  cursorDuration: 600,\n  caching: true,\n  hiddenTextareaContainer: null,\n  keysMap,\n  keysMapRtl,\n  ctrlKeysMapDown,\n  ctrlKeysMapUp,\n  ...protectedDefaultValues,\n};\n\n// @TODO this is not complete\ninterface UniqueITextProps {\n  selectionStart: number;\n  selectionEnd: number;\n}\n\nexport interface SerializedITextProps\n  extends SerializedTextProps,\n    UniqueITextProps {}\n\nexport interface ITextProps extends TextProps, UniqueITextProps {}\n\n/**\n * @fires changed\n * @fires selection:changed\n * @fires editing:entered\n * @fires editing:exited\n * @fires dragstart\n * @fires drag drag event firing on the drag source\n * @fires dragend\n * @fires copy\n * @fires cut\n * @fires paste\n *\n * #### Supported key combinations\n * ```\n *   Move cursor:                    left, right, up, down\n *   Select character:               shift + left, shift + right\n *   Select text vertically:         shift + up, shift + down\n *   Move cursor by word:            alt + left, alt + right\n *   Select words:                   shift + alt + left, shift + alt + right\n *   Move cursor to line start/end:  cmd + left, cmd + right or home, end\n *   Select till start/end of line:  cmd + shift + left, cmd + shift + right or shift + home, shift + end\n *   Jump to start/end of text:      cmd + up, cmd + down\n *   Select till start/end of text:  cmd + shift + up, cmd + shift + down or shift + pgUp, shift + pgDown\n *   Delete character:               backspace\n *   Delete word:                    alt + backspace\n *   Delete line:                    cmd + backspace\n *   Forward delete:                 delete\n *   Copy text:                      ctrl/cmd + c\n *   Paste text:                     ctrl/cmd + v\n *   Cut text:                       ctrl/cmd + x\n *   Select entire text:             ctrl/cmd + a\n *   Quit editing                    tab or esc\n * ```\n *\n * #### Supported mouse/touch combination\n * ```\n *   Position cursor:                click/touch\n *   Create selection:               click/touch & drag\n *   Create selection:               click & shift + click\n *   Select word:                    double click\n *   Select line:                    triple click\n * ```\n */\nexport class IText<\n    Props extends TOptions<ITextProps> = Partial<ITextProps>,\n    SProps extends SerializedITextProps = SerializedITextProps,\n    EventSpec extends ITextEvents = ITextEvents,\n  >\n  extends ITextClickBehavior<Props, SProps, EventSpec>\n  implements UniqueITextProps\n{\n  /**\n   * Index where text selection starts (or where cursor is when there is no selection)\n   * @type Number\n   * @default\n   */\n  declare selectionStart: number;\n\n  /**\n   * Index where text selection ends\n   * @type Number\n   * @default\n   */\n  declare selectionEnd: number;\n\n  declare compositionStart: number;\n\n  declare compositionEnd: number;\n\n  /**\n   * Color of text selection\n   * @type String\n   * @default\n   */\n  declare selectionColor: string;\n\n  /**\n   * Indicates whether text is in editing mode\n   * @type Boolean\n   * @default\n   */\n  declare isEditing: boolean;\n\n  /**\n   * Indicates whether a text can be edited\n   * @type Boolean\n   * @default\n   */\n  declare editable: boolean;\n\n  /**\n   * Border color of text object while it's in editing mode\n   * @type String\n   * @default\n   */\n  declare editingBorderColor: string;\n\n  /**\n   * Width of cursor (in px)\n   * @type Number\n   * @default\n   */\n  declare cursorWidth: number;\n\n  /**\n   * Color of text cursor color in editing mode.\n   * if not set (default) will take color from the text.\n   * if set to a color value that fabric can understand, it will\n   * be used instead of the color of the text at the current position.\n   * @type String\n   * @default\n   */\n  declare cursorColor: string;\n\n  /**\n   * Delay between cursor blink (in ms)\n   * @type Number\n   * @default\n   */\n  declare cursorDelay: number;\n\n  /**\n   * Duration of cursor fade in (in ms)\n   * @type Number\n   * @default\n   */\n  declare cursorDuration: number;\n\n  declare compositionColor: string;\n\n  /**\n   * Indicates whether internal text char widths can be cached\n   * @type Boolean\n   * @default\n   */\n  declare caching: boolean;\n\n  static ownDefaults = iTextDefaultValues;\n\n  static getDefaults(): Record<string, any> {\n    return { ...super.getDefaults(), ...IText.ownDefaults };\n  }\n\n  static type = 'IText';\n\n  get type() {\n    const type = super.type;\n    // backward compatibility\n    return type === 'itext' ? 'i-text' : type;\n  }\n\n  /**\n   * Constructor\n   * @param {String} text Text string\n   * @param {Object} [options] Options object\n   */\n  constructor(text: string, options?: Props) {\n    super(text, { ...IText.ownDefaults, ...options } as Props);\n    this.initBehavior();\n  }\n\n  /**\n   * While editing handle differently\n   * @private\n   * @param {string} key\n   * @param {*} value\n   */\n  _set(key: string, value: any) {\n    if (this.isEditing && this._savedProps && key in this._savedProps) {\n      // @ts-expect-error irritating TS\n      this._savedProps[key] = value;\n      return this;\n    }\n    if (key === 'canvas') {\n      this.canvas instanceof Canvas &&\n        this.canvas.textEditingManager.remove(this);\n      value instanceof Canvas && value.textEditingManager.add(this);\n    }\n    return super._set(key, value);\n  }\n\n  /**\n   * Sets selection start (left boundary of a selection)\n   * @param {Number} index Index to set selection start to\n   */\n  setSelectionStart(index: number) {\n    index = Math.max(index, 0);\n    this._updateAndFire('selectionStart', index);\n  }\n\n  /**\n   * Sets selection end (right boundary of a selection)\n   * @param {Number} index Index to set selection end to\n   */\n  setSelectionEnd(index: number) {\n    index = Math.min(index, this.text.length);\n    this._updateAndFire('selectionEnd', index);\n  }\n\n  /**\n   * @private\n   * @param {String} property 'selectionStart' or 'selectionEnd'\n   * @param {Number} index new position of property\n   */\n  protected _updateAndFire(\n    property: 'selectionStart' | 'selectionEnd',\n    index: number,\n  ) {\n    if (this[property] !== index) {\n      this._fireSelectionChanged();\n      this[property] = index;\n    }\n    this._updateTextarea();\n  }\n\n  /**\n   * Fires the even of selection changed\n   * @private\n   */\n  _fireSelectionChanged() {\n    this.fire('selection:changed');\n    this.canvas && this.canvas.fire('text:selection:changed', { target: this });\n  }\n\n  /**\n   * Initialize text dimensions. Render all text on given context\n   * or on a offscreen canvas to get the text width with measureText.\n   * Updates this.width and this.height with the proper values.\n   * Does not return dimensions.\n   * @private\n   */\n  initDimensions() {\n    this.isEditing && this.initDelayedCursor();\n    super.initDimensions();\n  }\n\n  /**\n   * Gets style of a current selection/cursor (at the start position)\n   * if startIndex or endIndex are not provided, selectionStart or selectionEnd will be used.\n   * @param {Number} startIndex Start index to get styles at\n   * @param {Number} endIndex End index to get styles at, if not specified selectionEnd or startIndex + 1\n   * @param {Boolean} [complete] get full style or not\n   * @return {Array} styles an array with one, zero or more Style objects\n   */\n  getSelectionStyles(\n    startIndex: number = this.selectionStart || 0,\n    endIndex: number = this.selectionEnd,\n    complete?: boolean,\n  ) {\n    return super.getSelectionStyles(startIndex, endIndex, complete);\n  }\n\n  /**\n   * Sets style of a current selection, if no selection exist, do not set anything.\n   * @param {Object} [styles] Styles object\n   * @param {Number} [startIndex] Start index to get styles at\n   * @param {Number} [endIndex] End index to get styles at, if not specified selectionEnd or startIndex + 1\n   */\n  setSelectionStyles(\n    styles: object,\n    startIndex: number = this.selectionStart || 0,\n    endIndex: number = this.selectionEnd,\n  ) {\n    return super.setSelectionStyles(styles, startIndex, endIndex);\n  }\n\n  /**\n   * Returns 2d representation (lineIndex and charIndex) of cursor (or selection start)\n   * @param {Number} [selectionStart] Optional index. When not given, current selectionStart is used.\n   * @param {Boolean} [skipWrapping] consider the location for unwrapped lines. useful to manage styles.\n   */\n  get2DCursorLocation(\n    selectionStart = this.selectionStart,\n    skipWrapping?: boolean,\n  ) {\n    return super.get2DCursorLocation(selectionStart, skipWrapping);\n  }\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} ctx Context to render on\n   */\n  render(ctx: CanvasRenderingContext2D) {\n    super.render(ctx);\n    // clear the cursorOffsetCache, so we ensure to calculate once per renderCursor\n    // the correct position but not at every cursor animation.\n    this.cursorOffsetCache = {};\n    this.renderCursorOrSelection();\n  }\n\n  /**\n   * @override block cursor/selection logic while rendering the exported canvas\n   * @todo this workaround should be replaced with a more robust solution\n   */\n  toCanvasElement(options?: ObjectToCanvasElementOptions): HTMLCanvasElement {\n    const isEditing = this.isEditing;\n    this.isEditing = false;\n    const canvas = super.toCanvasElement(options);\n    this.isEditing = isEditing;\n    return canvas;\n  }\n\n  /**\n   * Renders cursor or selection (depending on what exists)\n   * it does on the contextTop. If contextTop is not available, do nothing.\n   */\n  renderCursorOrSelection() {\n    if (!this.isEditing) {\n      return;\n    }\n    const ctx = this.clearContextTop(true);\n    if (!ctx) {\n      return;\n    }\n    const boundaries = this._getCursorBoundaries();\n    if (this.selectionStart === this.selectionEnd) {\n      this.renderCursor(ctx, boundaries);\n    } else {\n      this.renderSelection(ctx, boundaries);\n    }\n    this.canvas!.contextTopDirty = true;\n    ctx.restore();\n  }\n\n  /**\n   * Returns cursor boundaries (left, top, leftOffset, topOffset)\n   * left/top are left/top of entire text box\n   * leftOffset/topOffset are offset from that left/top point of a text box\n   * @private\n   * @param {number} [index] index from start\n   * @param {boolean} [skipCaching]\n   */\n  _getCursorBoundaries(\n    index: number = this.selectionStart,\n    skipCaching?: boolean,\n  ): CursorBoundaries {\n    const left = this._getLeftOffset(),\n      top = this._getTopOffset(),\n      offsets = this._getCursorBoundariesOffsets(index, skipCaching);\n    return {\n      left: left,\n      top: top,\n      leftOffset: offsets.left,\n      topOffset: offsets.top,\n    };\n  }\n\n  /**\n   * Caches and returns cursor left/top offset relative to instance's center point\n   * @private\n   * @param {number} index index from start\n   * @param {boolean} [skipCaching]\n   */\n  _getCursorBoundariesOffsets(\n    index: number,\n    skipCaching?: boolean,\n  ): { left: number; top: number } {\n    if (skipCaching) {\n      return this.__getCursorBoundariesOffsets(index);\n    }\n    if (this.cursorOffsetCache && 'top' in this.cursorOffsetCache) {\n      return this.cursorOffsetCache as { left: number; top: number };\n    }\n    return (this.cursorOffsetCache = this.__getCursorBoundariesOffsets(index));\n  }\n\n  /**\n   * Calculates cursor left/top offset relative to instance's center point\n   * @private\n   * @param {number} index index from start\n   */\n  __getCursorBoundariesOffsets(index: number) {\n    let topOffset = 0,\n      leftOffset = 0;\n    const { charIndex, lineIndex } = this.get2DCursorLocation(index);\n\n    for (let i = 0; i < lineIndex; i++) {\n      topOffset += this.getHeightOfLine(i);\n    }\n    const lineLeftOffset = this._getLineLeftOffset(lineIndex);\n    const bound = this.__charBounds[lineIndex][charIndex];\n    bound && (leftOffset = bound.left);\n    if (\n      this.charSpacing !== 0 &&\n      charIndex === this._textLines[lineIndex].length\n    ) {\n      leftOffset -= this._getWidthOfCharSpacing();\n    }\n    const boundaries = {\n      top: topOffset,\n      left: lineLeftOffset + (leftOffset > 0 ? leftOffset : 0),\n    };\n    if (this.direction === 'rtl') {\n      if (\n        this.textAlign === RIGHT ||\n        this.textAlign === JUSTIFY ||\n        this.textAlign === JUSTIFY_RIGHT\n      ) {\n        boundaries.left *= -1;\n      } else if (this.textAlign === LEFT || this.textAlign === JUSTIFY_LEFT) {\n        boundaries.left = lineLeftOffset - (leftOffset > 0 ? leftOffset : 0);\n      } else if (\n        this.textAlign === CENTER ||\n        this.textAlign === JUSTIFY_CENTER\n      ) {\n        boundaries.left = lineLeftOffset - (leftOffset > 0 ? leftOffset : 0);\n      }\n    }\n    return boundaries;\n  }\n\n  /**\n   * Renders cursor on context Top, outside the animation cycle, on request\n   * Used for the drag/drop effect.\n   * If contextTop is not available, do nothing.\n   */\n  renderCursorAt(selectionStart: number) {\n    const boundaries = this._getCursorBoundaries(selectionStart, true);\n    this._renderCursor(this.canvas!.contextTop, boundaries, selectionStart);\n  }\n\n  /**\n   * Renders cursor\n   * @param {Object} boundaries\n   * @param {CanvasRenderingContext2D} ctx transformed context to draw on\n   */\n  renderCursor(ctx: CanvasRenderingContext2D, boundaries: CursorBoundaries) {\n    this._renderCursor(ctx, boundaries, this.selectionStart);\n  }\n\n  _renderCursor(\n    ctx: CanvasRenderingContext2D,\n    boundaries: CursorBoundaries,\n    selectionStart: number,\n  ) {\n    const cursorLocation = this.get2DCursorLocation(selectionStart),\n      lineIndex = cursorLocation.lineIndex,\n      charIndex =\n        cursorLocation.charIndex > 0 ? cursorLocation.charIndex - 1 : 0,\n      charHeight = this.getValueOfPropertyAt(lineIndex, charIndex, 'fontSize'),\n      multiplier = this.getObjectScaling().x * this.canvas!.getZoom(),\n      cursorWidth = this.cursorWidth / multiplier,\n      dy = this.getValueOfPropertyAt(lineIndex, charIndex, 'deltaY'),\n      topOffset =\n        boundaries.topOffset +\n        ((1 - this._fontSizeFraction) * this.getHeightOfLine(lineIndex)) /\n          this.lineHeight -\n        charHeight * (1 - this._fontSizeFraction);\n\n    if (this.inCompositionMode) {\n      // TODO: investigate why there isn't a return inside the if,\n      // and why can't happen at the top of the function\n      this.renderSelection(ctx, boundaries);\n    }\n    ctx.fillStyle =\n      this.cursorColor ||\n      (this.getValueOfPropertyAt(lineIndex, charIndex, FILL) as string);\n    ctx.globalAlpha = this._currentCursorOpacity;\n    ctx.fillRect(\n      boundaries.left + boundaries.leftOffset - cursorWidth / 2,\n      topOffset + boundaries.top + dy,\n      cursorWidth,\n      charHeight,\n    );\n  }\n\n  /**\n   * Renders text selection\n   * @param {Object} boundaries Object with left/top/leftOffset/topOffset\n   * @param {CanvasRenderingContext2D} ctx transformed context to draw on\n   */\n  renderSelection(ctx: CanvasRenderingContext2D, boundaries: CursorBoundaries) {\n    const selection = {\n      selectionStart: this.inCompositionMode\n        ? this.hiddenTextarea!.selectionStart\n        : this.selectionStart,\n      selectionEnd: this.inCompositionMode\n        ? this.hiddenTextarea!.selectionEnd\n        : this.selectionEnd,\n    };\n    this._renderSelection(ctx, selection, boundaries);\n  }\n\n  /**\n   * Renders drag start text selection\n   */\n  renderDragSourceEffect() {\n    const dragStartSelection =\n      this.draggableTextDelegate.getDragStartSelection()!;\n    this._renderSelection(\n      this.canvas!.contextTop,\n      dragStartSelection,\n      this._getCursorBoundaries(dragStartSelection.selectionStart, true),\n    );\n  }\n\n  renderDropTargetEffect(e: DragEvent) {\n    const dragSelection = this.getSelectionStartFromPointer(e);\n    this.renderCursorAt(dragSelection);\n  }\n\n  /**\n   * Renders text selection\n   * @private\n   * @param {{ selectionStart: number, selectionEnd: number }} selection\n   * @param {Object} boundaries Object with left/top/leftOffset/topOffset\n   * @param {CanvasRenderingContext2D} ctx transformed context to draw on\n   */\n  _renderSelection(\n    ctx: CanvasRenderingContext2D,\n    selection: { selectionStart: number; selectionEnd: number },\n    boundaries: CursorBoundaries,\n  ) {\n    const selectionStart = selection.selectionStart,\n      selectionEnd = selection.selectionEnd,\n      isJustify = this.textAlign.includes(JUSTIFY),\n      start = this.get2DCursorLocation(selectionStart),\n      end = this.get2DCursorLocation(selectionEnd),\n      startLine = start.lineIndex,\n      endLine = end.lineIndex,\n      startChar = start.charIndex < 0 ? 0 : start.charIndex,\n      endChar = end.charIndex < 0 ? 0 : end.charIndex;\n\n    for (let i = startLine; i <= endLine; i++) {\n      const lineOffset = this._getLineLeftOffset(i) || 0;\n      let lineHeight = this.getHeightOfLine(i),\n        realLineHeight = 0,\n        boxStart = 0,\n        boxEnd = 0;\n\n      if (i === startLine) {\n        boxStart = this.__charBounds[startLine][startChar].left;\n      }\n      if (i >= startLine && i < endLine) {\n        boxEnd =\n          isJustify && !this.isEndOfWrapping(i)\n            ? this.width\n            : this.getLineWidth(i) || 5; // WTF is this 5?\n      } else if (i === endLine) {\n        if (endChar === 0) {\n          boxEnd = this.__charBounds[endLine][endChar].left;\n        } else {\n          const charSpacing = this._getWidthOfCharSpacing();\n          boxEnd =\n            this.__charBounds[endLine][endChar - 1].left +\n            this.__charBounds[endLine][endChar - 1].width -\n            charSpacing;\n        }\n      }\n      realLineHeight = lineHeight;\n      if (this.lineHeight < 1 || (i === endLine && this.lineHeight > 1)) {\n        lineHeight /= this.lineHeight;\n      }\n      let drawStart = boundaries.left + lineOffset + boxStart,\n        drawHeight = lineHeight,\n        extraTop = 0;\n      const drawWidth = boxEnd - boxStart;\n      if (this.inCompositionMode) {\n        ctx.fillStyle = this.compositionColor || 'black';\n        drawHeight = 1;\n        extraTop = lineHeight;\n      } else {\n        ctx.fillStyle = this.selectionColor;\n      }\n      if (this.direction === 'rtl') {\n        if (\n          this.textAlign === RIGHT ||\n          this.textAlign === JUSTIFY ||\n          this.textAlign === JUSTIFY_RIGHT\n        ) {\n          drawStart = this.width - drawStart - drawWidth;\n        } else if (this.textAlign === LEFT || this.textAlign === JUSTIFY_LEFT) {\n          drawStart = boundaries.left + lineOffset - boxEnd;\n        } else if (\n          this.textAlign === CENTER ||\n          this.textAlign === JUSTIFY_CENTER\n        ) {\n          drawStart = boundaries.left + lineOffset - boxEnd;\n        }\n      }\n      ctx.fillRect(\n        drawStart,\n        boundaries.top + boundaries.topOffset + extraTop,\n        drawWidth,\n        drawHeight,\n      );\n      boundaries.topOffset += realLineHeight;\n    }\n  }\n\n  /**\n   * High level function to know the height of the cursor.\n   * the currentChar is the one that precedes the cursor\n   * Returns fontSize of char at the current cursor\n   * Unused from the library, is for the end user\n   * @return {Number} Character font size\n   */\n  getCurrentCharFontSize(): number {\n    const cp = this._getCurrentCharIndex();\n    return this.getValueOfPropertyAt(cp.l, cp.c, 'fontSize');\n  }\n\n  /**\n   * High level function to know the color of the cursor.\n   * the currentChar is the one that precedes the cursor\n   * Returns color (fill) of char at the current cursor\n   * if the text object has a pattern or gradient for filler, it will return that.\n   * Unused by the library, is for the end user\n   * @return {String | TFiller} Character color (fill)\n   */\n  getCurrentCharColor(): string | TFiller | null {\n    const cp = this._getCurrentCharIndex();\n    return this.getValueOfPropertyAt(cp.l, cp.c, FILL);\n  }\n\n  /**\n   * Returns the cursor position for the getCurrent.. functions\n   * @private\n   */\n  _getCurrentCharIndex() {\n    const cursorPosition = this.get2DCursorLocation(this.selectionStart, true),\n      charIndex =\n        cursorPosition.charIndex > 0 ? cursorPosition.charIndex - 1 : 0;\n    return { l: cursorPosition.lineIndex, c: charIndex };\n  }\n\n  dispose() {\n    this._exitEditing();\n    this.draggableTextDelegate.dispose();\n    super.dispose();\n  }\n}\n\nclassRegistry.setClass(IText);\n// legacy\nclassRegistry.setClass(IText, 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