@tldraw/editor/dist-cjs/lib/exports/FontEmbedder.js

tldraw infinite canvas SDK (editor).

"use strict";
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var FontEmbedder_exports = {};
__export(FontEmbedder_exports, {
  FontEmbedder: () => FontEmbedder,
  SVG_EXPORT_CLASSNAME: () => SVG_EXPORT_CLASSNAME
});
module.exports = __toCommonJS(FontEmbedder_exports);
var import_utils = require("@tldraw/utils");
var import_fetchCache = require("./fetchCache");
var import_parseCss = require("./parseCss");
var _onFontFamilyValue_dec, _init;
const SVG_EXPORT_CLASSNAME = "tldraw-svg-export";
_onFontFamilyValue_dec = [import_utils.bind];
class FontEmbedder {
  constructor() {
    __runInitializers(_init, 5, this);
    __publicField(this, "fontFacesPromise", null);
    __publicField(this, "foundFontNames", /* @__PURE__ */ new Set());
    __publicField(this, "fontFacesToEmbed", /* @__PURE__ */ new Set());
    __publicField(this, "pendingPromises", []);
  }
  startFindingCurrentDocumentFontFaces() {
    (0, import_utils.assert)(!this.fontFacesPromise, "FontEmbedder already started");
    this.fontFacesPromise = getCurrentDocumentFontFaces();
  }
  onFontFamilyValue(fontFamilyValue) {
    (0, import_utils.assert)(this.fontFacesPromise, "FontEmbedder not started");
    const fonts = (0, import_parseCss.parseCssFontFamilyValue)(fontFamilyValue);
    for (const font of fonts) {
      if (this.foundFontNames.has(font)) return;
      this.foundFontNames.add(font);
      this.pendingPromises.push(
        this.fontFacesPromise.then((fontFaces) => {
          const relevantFontFaces = fontFaces.filter((fontFace) => fontFace.fontFamilies.has(font));
          for (const fontFace of relevantFontFaces) {
            if (this.fontFacesToEmbed.has(fontFace)) continue;
            this.fontFacesToEmbed.add(fontFace);
            for (const url of fontFace.urls) {
              if (!url.resolved || url.embedded) continue;
              url.embedded = (0, import_fetchCache.resourceToDataUrl)(url.resolved);
            }
          }
        })
      );
    }
  }
  async createCss() {
    await Promise.all(this.pendingPromises);
    let css = "";
    for (const fontFace of this.fontFacesToEmbed) {
      let fontFaceString = `@font-face {${fontFace.fontFace}}`;
      for (const url of fontFace.urls) {
        if (!url.embedded) continue;
        const dataUrl = await url.embedded;
        if (!dataUrl) continue;
        fontFaceString = fontFaceString.replace(url.original, dataUrl);
      }
      css += fontFaceString;
    }
    return css;
  }
}
_init = __decoratorStart(null);
__decorateElement(_init, 1, "onFontFamilyValue", _onFontFamilyValue_dec, FontEmbedder);
__decoratorMetadata(_init, FontEmbedder);
async function getCurrentDocumentFontFaces() {
  const fontFaces = [];
  const styleSheetsWithoutSvgExports = Array.from(document.styleSheets).filter(
    (styleSheet) => !styleSheet.ownerNode?.closest(`.${SVG_EXPORT_CLASSNAME}`)
  );
  for (const styleSheet of styleSheetsWithoutSvgExports) {
    let cssRules;
    try {
      cssRules = styleSheet.cssRules;
    } catch {
    }
    if (cssRules) {
      for (const rule of styleSheet.cssRules) {
        if (rule instanceof CSSFontFaceRule) {
          fontFaces.push((0, import_parseCss.parseCssFontFaces)(rule.cssText, styleSheet.href ?? document.baseURI));
        } else if (rule instanceof CSSImportRule) {
          const absoluteUrl = new URL(rule.href, rule.parentStyleSheet?.href ?? document.baseURI);
          fontFaces.push(fetchCssFontFaces(absoluteUrl.href));
        }
      }
    } else if (styleSheet.href) {
      fontFaces.push(fetchCssFontFaces(styleSheet.href));
    }
  }
  return (0, import_utils.compact)(await Promise.all(fontFaces)).flat();
}
const fetchCssFontFaces = (0, import_fetchCache.fetchCache)(async (response) => {
  const parsed = (0, import_parseCss.parseCss)(await response.text(), response.url);
  const importedFontFaces = await Promise.all(
    parsed.imports.map(({ url }) => fetchCssFontFaces(new URL(url, response.url).href))
  );
  return [...parsed.fontFaces, ...(0, import_utils.compact)(importedFontFaces).flat()];
});
//# sourceMappingURL=FontEmbedder.js.map