@tldraw/editor
Version:
tldraw infinite canvas SDK (editor).
145 lines (144 loc) • 7.79 kB
JavaScript
var __create = Object.create;
var __defProp = Object.defineProperty;
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var __typeError = (msg) => {
throw TypeError(msg);
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var __name = (target, value) => __defProp(target, "name", { value, configurable: true });
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var __decoratorMetadata = (array, target) => __defNormalProp(target, __knownSymbol("metadata"), array[3]);
var __runInitializers = (array, flags, self, value) => {
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k ? p && k < 4 && __name(extra, (k > 2 ? "set " : k > 1 ? "get " : "") + name) : __name(target, name);
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var __accessCheck = (obj, member, msg) => member.has(obj) || __typeError("Cannot " + msg);
var __privateIn = (member, obj) => Object(obj) !== obj ? __typeError('Cannot use the "in" operator on this value') : member.has(obj);
var __privateGet = (obj, member, getter) => (__accessCheck(obj, member, "read from private field"), getter ? getter.call(obj) : member.get(obj));
var __privateSet = (obj, member, value, setter) => (__accessCheck(obj, member, "write to private field"), setter ? setter.call(obj, value) : member.set(obj, value), value);
var __privateMethod = (obj, member, method) => (__accessCheck(obj, member, "access private method"), method);
var _onFontFamilyValue_dec, _init;
import { assert, bind, compact } from "@tldraw/utils";
import { fetchCache, resourceToDataUrl } from "./fetchCache.mjs";
import { parseCss, parseCssFontFaces, parseCssFontFamilyValue } from "./parseCss.mjs";
const SVG_EXPORT_CLASSNAME = "tldraw-svg-export";
_onFontFamilyValue_dec = [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() {
assert(!this.fontFacesPromise, "FontEmbedder already started");
this.fontFacesPromise = getCurrentDocumentFontFaces();
}
onFontFamilyValue(fontFamilyValue) {
assert(this.fontFacesPromise, "FontEmbedder not started");
const fonts = 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 = 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(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 compact(await Promise.all(fontFaces)).flat();
}
const fetchCssFontFaces = fetchCache(async (response) => {
const parsed = 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, ...compact(importedFontFaces).flat()];
});
export {
FontEmbedder,
SVG_EXPORT_CLASSNAME
};
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