fabric/dist/src/cache.mjs.map

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

{"version":3,"file":"cache.mjs","sources":["../../src/cache.ts"],"sourcesContent":["import { config } from './config';\nimport type { TRectBounds } from './typedefs';\n\nexport class Cache {\n  /**\n   * Cache of widths of chars in text rendering.\n   */\n  charWidthsCache: Record<\n    /** fontFamily */ string,\n    Record<\n      /** fontStyleCacheKey */ string,\n      Record</** char */ string, /** width */ number>\n    >\n  > = {};\n\n  /**\n   * @return {Object} reference to cache\n   */\n  getFontCache({\n    fontFamily,\n    fontStyle,\n    fontWeight,\n  }: {\n    fontFamily: string;\n    fontStyle: string;\n    fontWeight: string | number;\n  }) {\n    fontFamily = fontFamily.toLowerCase();\n    if (!this.charWidthsCache[fontFamily]) {\n      this.charWidthsCache[fontFamily] = {};\n    }\n    const fontCache = this.charWidthsCache[fontFamily];\n    const cacheKey = `${fontStyle.toLowerCase()}_${(\n      fontWeight + ''\n    ).toLowerCase()}`;\n    if (!fontCache[cacheKey]) {\n      fontCache[cacheKey] = {};\n    }\n    return fontCache[cacheKey];\n  }\n\n  /**\n   * Clear char widths cache for the given font family or all the cache if no\n   * fontFamily is specified.\n   * Use it if you know you are loading fonts in a lazy way and you are not waiting\n   * for custom fonts to load properly when adding text objects to the canvas.\n   * If a text object is added when its own font is not loaded yet, you will get wrong\n   * measurement and so wrong bounding boxes.\n   * After the font cache is cleared, either change the textObject text content or call\n   * initDimensions() to trigger a recalculation\n   * @param {String} [fontFamily] font family to clear\n   */\n  clearFontCache(fontFamily?: string) {\n    fontFamily = (fontFamily || '').toLowerCase();\n    if (!fontFamily) {\n      this.charWidthsCache = {};\n    } else if (this.charWidthsCache[fontFamily]) {\n      delete this.charWidthsCache[fontFamily];\n    }\n  }\n\n  /**\n   * Given current aspect ratio, determines the max width and height that can\n   * respect the total allowed area for the cache.\n   * @param {number} ar aspect ratio\n   * @return {number[]} Limited dimensions X and Y\n   */\n  limitDimsByArea(ar: number) {\n    const { perfLimitSizeTotal } = config;\n    const roughWidth = Math.sqrt(perfLimitSizeTotal * ar);\n    // we are not returning a point on purpose, to avoid circular dependencies\n    // this is an internal utility\n    return [\n      Math.floor(roughWidth),\n      Math.floor(perfLimitSizeTotal / roughWidth),\n    ];\n  }\n\n  /**\n   * This object keeps the results of the boundsOfCurve calculation mapped by the joined arguments necessary to calculate it.\n   * It does speed up calculation, if you parse and add always the same paths, but in case of heavy usage of freedrawing\n   * you do not get any speed benefit and you get a big object in memory.\n   * The object was a private variable before, while now is appended to the lib so that you have access to it and you\n   * can eventually clear it.\n   * It was an internal variable, is accessible since version 2.3.4\n   */\n  boundsOfCurveCache: Record<string, TRectBounds> = {};\n}\n\nexport const cache = new Cache();\n"],"names":["Cache","constructor","_defineProperty","getFontCache","_ref","fontFamily","fontStyle","fontWeight","toLowerCase","charWidthsCache","fontCache","cacheKey","concat","clearFontCache","limitDimsByArea","ar","perfLimitSizeTotal","config","roughWidth","Math","sqrt","floor","cache"],"mappings":";;;AAGO,MAAMA,KAAK,CAAC;EAAAC,WAAA,GAAA;AACjB;AACF;AACA;IAFEC,eAAA,CAAA,IAAA,EAAA,iBAAA,EASI,EAAE,CAAA,CAAA;AAiEN;AACF;AACA;AACA;AACA;AACA;AACA;AACA;IAPEA,eAAA,CAAA,IAAA,EAAA,oBAAA,EAQkD,EAAE,CAAA,CAAA;AAAA,GAAA;AAvEpD;AACF;AACA;EACEC,YAAYA,CAAAC,IAAA,EAQT;IAAA,IARU;MACXC,UAAU;MACVC,SAAS;AACTC,MAAAA,UAAAA;AAKF,KAAC,GAAAH,IAAA,CAAA;AACCC,IAAAA,UAAU,GAAGA,UAAU,CAACG,WAAW,EAAE,CAAA;AACrC,IAAA,IAAI,CAAC,IAAI,CAACC,eAAe,CAACJ,UAAU,CAAC,EAAE;AACrC,MAAA,IAAI,CAACI,eAAe,CAACJ,UAAU,CAAC,GAAG,EAAE,CAAA;AACvC,KAAA;AACA,IAAA,MAAMK,SAAS,GAAG,IAAI,CAACD,eAAe,CAACJ,UAAU,CAAC,CAAA;IAClD,MAAMM,QAAQ,MAAAC,MAAA,CAAMN,SAAS,CAACE,WAAW,EAAE,EAAA,GAAA,CAAA,CAAAI,MAAA,CAAI,CAC7CL,UAAU,GAAG,EAAE,EACfC,WAAW,EAAE,CAAE,CAAA;AACjB,IAAA,IAAI,CAACE,SAAS,CAACC,QAAQ,CAAC,EAAE;AACxBD,MAAAA,SAAS,CAACC,QAAQ,CAAC,GAAG,EAAE,CAAA;AAC1B,KAAA;IACA,OAAOD,SAAS,CAACC,QAAQ,CAAC,CAAA;AAC5B,GAAA;;AAEA;AACF;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;EACEE,cAAcA,CAACR,UAAmB,EAAE;IAClCA,UAAU,GAAG,CAACA,UAAU,IAAI,EAAE,EAAEG,WAAW,EAAE,CAAA;IAC7C,IAAI,CAACH,UAAU,EAAE;AACf,MAAA,IAAI,CAACI,eAAe,GAAG,EAAE,CAAA;KAC1B,MAAM,IAAI,IAAI,CAACA,eAAe,CAACJ,UAAU,CAAC,EAAE;AAC3C,MAAA,OAAO,IAAI,CAACI,eAAe,CAACJ,UAAU,CAAC,CAAA;AACzC,KAAA;AACF,GAAA;;AAEA;AACF;AACA;AACA;AACA;AACA;EACES,eAAeA,CAACC,EAAU,EAAE;IAC1B,MAAM;AAAEC,MAAAA,kBAAAA;AAAmB,KAAC,GAAGC,MAAM,CAAA;IACrC,MAAMC,UAAU,GAAGC,IAAI,CAACC,IAAI,CAACJ,kBAAkB,GAAGD,EAAE,CAAC,CAAA;AACrD;AACA;AACA,IAAA,OAAO,CACLI,IAAI,CAACE,KAAK,CAACH,UAAU,CAAC,EACtBC,IAAI,CAACE,KAAK,CAACL,kBAAkB,GAAGE,UAAU,CAAC,CAC5C,CAAA;AACH,GAAA;AAWF,CAAA;MAEaI,KAAK,GAAG,IAAItB,KAAK;;;;"}