feat: add first-class support for CJK (#8530)
Marcel Mraz
4 months ago
committed by
GitHub
parent
21815fb930
commit
b479f3bd65
@ -1,214 +0,0 @@
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import {
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base64ToArrayBuffer,
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stringToBase64,
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toByteString,
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} from "../data/encode";
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import { LOCAL_FONT_PROTOCOL } from "./metadata";
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import loadWoff2 from "./wasm/woff2.loader";
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import loadHbSubset from "./wasm/hb-subset.loader";
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export interface Font {
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urls: URL[];
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fontFace: FontFace;
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getContent(codePoints: ReadonlySet<number>): Promise<string>;
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}
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export const UNPKG_FALLBACK_URL = `https://unpkg.com/${
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import.meta.env.VITE_PKG_NAME
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? `${import.meta.env.VITE_PKG_NAME}@${import.meta.env.PKG_VERSION}` // should be provided by vite during package build
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: "@excalidraw/excalidraw" // fallback to latest package version (i.e. for app)
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}/dist/prod/`;
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export class ExcalidrawFont implements Font {
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public readonly urls: URL[];
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public readonly fontFace: FontFace;
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constructor(family: string, uri: string, descriptors?: FontFaceDescriptors) {
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this.urls = ExcalidrawFont.createUrls(uri);
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const sources = this.urls
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.map((url) => `url(${url}) ${ExcalidrawFont.getFormat(url)}`)
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.join(", ");
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this.fontFace = new FontFace(family, sources, {
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display: "swap",
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style: "normal",
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weight: "400",
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...descriptors,
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});
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}
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/**
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* Tries to fetch woff2 content, based on the registered urls (from first to last, treated as fallbacks).
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*
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* NOTE: assumes usage of `dataurl` outside the browser environment
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*
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* @returns base64 with subsetted glyphs based on the passed codepoint, last defined url otherwise
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*/
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public async getContent(codePoints: ReadonlySet<number>): Promise<string> {
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let i = 0;
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const errorMessages = [];
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while (i < this.urls.length) {
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const url = this.urls[i];
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// it's dataurl (server), the font is inlined as base64, no need to fetch
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if (url.protocol === "data:") {
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const arrayBuffer = base64ToArrayBuffer(url.toString().split(",")[1]);
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const base64 = await ExcalidrawFont.subsetGlyphsByCodePoints(
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arrayBuffer,
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codePoints,
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);
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return base64;
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}
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try {
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const response = await fetch(url, {
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headers: {
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Accept: "font/woff2",
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},
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});
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if (response.ok) {
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const arrayBuffer = await response.arrayBuffer();
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const base64 = await ExcalidrawFont.subsetGlyphsByCodePoints(
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arrayBuffer,
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codePoints,
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);
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return base64;
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}
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// response not ok, try to continue
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errorMessages.push(
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`"${url.toString()}" returned status "${response.status}"`,
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);
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} catch (e) {
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errorMessages.push(`"${url.toString()}" returned error "${e}"`);
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}
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i++;
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}
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console.error(
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`Failed to fetch font "${
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this.fontFace.family
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}" from urls "${this.urls.toString()}`,
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JSON.stringify(errorMessages, undefined, 2),
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);
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// in case of issues, at least return the last url as a content
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// defaults to unpkg for bundled fonts (so that we don't have to host them forever) and http url for others
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return this.urls.length ? this.urls[this.urls.length - 1].toString() : "";
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}
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/**
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* Tries to subset glyphs in a font based on the used codepoints, returning the font as daturl.
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*
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* @param arrayBuffer font data buffer, preferrably in the woff2 format, though others should work as well
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* @param codePoints codepoints used to subset the glyphs
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*
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* @returns font with subsetted glyphs (all glyphs in case of errors) converted into a dataurl
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*/
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private static async subsetGlyphsByCodePoints(
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arrayBuffer: ArrayBuffer,
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codePoints: ReadonlySet<number>,
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): Promise<string> {
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try {
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// lazy loaded wasm modules to avoid multiple initializations in case of concurrent triggers
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const { compress, decompress } = await loadWoff2();
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const { subset } = await loadHbSubset();
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const decompressedBinary = decompress(arrayBuffer).buffer;
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const subsetSnft = subset(decompressedBinary, codePoints);
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const compressedBinary = compress(subsetSnft.buffer);
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return ExcalidrawFont.toBase64(compressedBinary.buffer);
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} catch (e) {
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console.error("Skipped glyph subsetting", e);
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// Fallback to encoding whole font in case of errors
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return ExcalidrawFont.toBase64(arrayBuffer);
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}
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}
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private static async toBase64(arrayBuffer: ArrayBuffer) {
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let base64: string;
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if (typeof Buffer !== "undefined") {
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// node + server-side
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base64 = Buffer.from(arrayBuffer).toString("base64");
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} else {
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base64 = await stringToBase64(await toByteString(arrayBuffer), true);
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}
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return `data:font/woff2;base64,${base64}`;
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}
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private static createUrls(uri: string): URL[] {
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if (uri.startsWith(LOCAL_FONT_PROTOCOL)) {
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// no url for local fonts
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return [];
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}
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if (uri.startsWith("http") || uri.startsWith("data")) {
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// one url for http imports or data url
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return [new URL(uri)];
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}
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// absolute assets paths, which are found in tests and excalidraw-app build, won't work with base url, so we are stripping initial slash away
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const assetUrl: string = uri.replace(/^\/+/, "");
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const urls: URL[] = [];
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if (typeof window.EXCALIDRAW_ASSET_PATH === "string") {
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const normalizedBaseUrl = this.normalizeBaseUrl(
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window.EXCALIDRAW_ASSET_PATH,
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);
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urls.push(new URL(assetUrl, normalizedBaseUrl));
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} else if (Array.isArray(window.EXCALIDRAW_ASSET_PATH)) {
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window.EXCALIDRAW_ASSET_PATH.forEach((path) => {
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const normalizedBaseUrl = this.normalizeBaseUrl(path);
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urls.push(new URL(assetUrl, normalizedBaseUrl));
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});
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}
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// fallback url for bundled fonts
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urls.push(new URL(assetUrl, UNPKG_FALLBACK_URL));
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return urls;
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}
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private static getFormat(url: URL) {
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try {
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const parts = new URL(url).pathname.split(".");
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if (parts.length === 1) {
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return "";
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}
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return `format('${parts.pop()}')`;
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} catch (error) {
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return "";
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}
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}
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private static normalizeBaseUrl(baseUrl: string) {
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let result = baseUrl;
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// in case user passed a root-relative url (~absolute path),
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// like "/" or "/some/path", or relative (starts with "./"),
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// prepend it with `location.origin`
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if (/^\.?\//.test(result)) {
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result = new URL(
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result.replace(/^\.?\/+/, ""),
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window?.location?.origin,
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).toString();
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}
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// ensure there is a trailing slash, otherwise url won't be correctly concatenated
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result = `${result.replace(/\/+$/, "")}/`;
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return result;
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}
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}
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@ -0,0 +1,213 @@
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import { promiseTry } from "../utils";
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import { LOCAL_FONT_PROTOCOL } from "./metadata";
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import { subsetWoff2GlyphsByCodepoints } from "./subset/subset-main";
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type DataURL = string;
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export interface IExcalidrawFontFace {
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urls: URL[] | DataURL[];
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fontFace: FontFace;
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toCSS(
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characters: string,
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codePoints: Array<number>,
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): Promise<string> | undefined;
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}
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export class ExcalidrawFontFace implements IExcalidrawFontFace {
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public readonly urls: URL[] | DataURL[];
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public readonly fontFace: FontFace;
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private static readonly UNPKG_FALLBACK_URL = `https://unpkg.com/${
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import.meta.env.VITE_PKG_NAME
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? `${import.meta.env.VITE_PKG_NAME}@${import.meta.env.PKG_VERSION}` // should be provided by vite during package build
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: "@excalidraw/excalidraw" // fallback to latest package version (i.e. for app)
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}/dist/prod/`;
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constructor(family: string, uri: string, descriptors?: FontFaceDescriptors) {
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this.urls = ExcalidrawFontFace.createUrls(uri);
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const sources = this.urls
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.map((url) => `url(${url}) ${ExcalidrawFontFace.getFormat(url)}`)
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.join(", ");
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this.fontFace = new FontFace(family, sources, {
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display: "swap",
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style: "normal",
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weight: "400",
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...descriptors,
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});
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}
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/**
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* Generates CSS `@font-face` definition with the (subsetted) font source as a data url for the characters within the unicode range.
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*
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* Retrieves `undefined` otherwise.
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*/
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public toCSS(
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characters: string,
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codePoints: Array<number>,
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): Promise<string> | undefined {
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// quick exit in case the characters are not within this font face's unicode range
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if (!this.getUnicodeRangeRegex().test(characters)) {
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return;
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}
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return this.getContent(codePoints).then(
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(content) =>
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`@font-face { font-family: ${this.fontFace.family}; src: url(${content}); }`,
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);
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}
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/**
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* Tries to fetch woff2 content, based on the registered urls (from first to last, treated as fallbacks).
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*
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* @returns base64 with subsetted glyphs based on the passed codepoint, last defined url otherwise
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*/
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public async getContent(codePoints: Array<number>): Promise<string> {
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let i = 0;
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const errorMessages = [];
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while (i < this.urls.length) {
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const url = this.urls[i];
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try {
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const arrayBuffer = await this.fetchFont(url);
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const base64 = await subsetWoff2GlyphsByCodepoints(
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arrayBuffer,
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codePoints,
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);
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return base64;
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} catch (e) {
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errorMessages.push(`"${url.toString()}" returned error "${e}"`);
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}
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i++;
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}
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console.error(
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`Failed to fetch font family "${this.fontFace.family}"`,
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JSON.stringify(errorMessages, undefined, 2),
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);
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// in case of issues, at least return the last url as a content
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// defaults to unpkg for bundled fonts (so that we don't have to host them forever) and http url for others
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return this.urls.length ? this.urls[this.urls.length - 1].toString() : "";
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}
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public fetchFont(url: URL | DataURL): Promise<ArrayBuffer> {
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return promiseTry(async () => {
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const response = await fetch(url, {
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headers: {
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Accept: "font/woff2",
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},
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});
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if (!response.ok) {
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const urlString = url instanceof URL ? url.toString() : "dataurl";
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throw new Error(
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`Failed to fetch "${urlString}": ${response.statusText}`,
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);
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}
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const arrayBuffer = await response.arrayBuffer();
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return arrayBuffer;
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});
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}
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private getUnicodeRangeRegex() {
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// using \u{h} or \u{hhhhh} to match any number of hex digits,
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// otherwise we would get an "Invalid Unicode escape" error
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// e.g. U+0-1007F -> \u{0}-\u{1007F}
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const unicodeRangeRegex = this.fontFace.unicodeRange
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.split(/,\s*/)
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.map((range) => {
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const [start, end] = range.replace("U+", "").split("-");
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if (end) {
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return `\\u{${start}}-\\u{${end}}`;
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}
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return `\\u{${start}}`;
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})
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.join("");
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return new RegExp(`[${unicodeRangeRegex}]`, "u");
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}
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private static createUrls(uri: string): URL[] | DataURL[] {
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if (uri.startsWith("data")) {
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// don't create the URL instance, as parsing the huge dataurl string is expensive
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return [uri];
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}
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if (uri.startsWith(LOCAL_FONT_PROTOCOL)) {
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// no url for local fonts
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return [];
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}
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if (uri.startsWith("http")) {
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// one url for http imports or data url
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return [new URL(uri)];
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}
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// absolute assets paths, which are found in tests and excalidraw-app build, won't work with base url, so we are stripping initial slash away
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const assetUrl: string = uri.replace(/^\/+/, "");
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const urls: URL[] = [];
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if (typeof window.EXCALIDRAW_ASSET_PATH === "string") {
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const normalizedBaseUrl = this.normalizeBaseUrl(
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window.EXCALIDRAW_ASSET_PATH,
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);
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urls.push(new URL(assetUrl, normalizedBaseUrl));
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} else if (Array.isArray(window.EXCALIDRAW_ASSET_PATH)) {
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window.EXCALIDRAW_ASSET_PATH.forEach((path) => {
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const normalizedBaseUrl = this.normalizeBaseUrl(path);
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urls.push(new URL(assetUrl, normalizedBaseUrl));
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});
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}
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// fallback url for bundled fonts
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urls.push(new URL(assetUrl, ExcalidrawFontFace.UNPKG_FALLBACK_URL));
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return urls;
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}
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private static getFormat(url: URL | DataURL) {
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if (!(url instanceof URL)) {
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// format is irrelevant for data url
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return "";
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}
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try {
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||||||
|
const parts = new URL(url).pathname.split(".");
|
||||||
|
|
||||||
|
if (parts.length === 1) {
|
||||||
|
return "";
|
||||||
|
}
|
||||||
|
|
||||||
|
return `format('${parts.pop()}')`;
|
||||||
|
} catch (error) {
|
||||||
|
return "";
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
private static normalizeBaseUrl(baseUrl: string) {
|
||||||
|
let result = baseUrl;
|
||||||
|
|
||||||
|
// in case user passed a root-relative url (~absolute path),
|
||||||
|
// like "/" or "/some/path", or relative (starts with "./"),
|
||||||
|
// prepend it with `location.origin`
|
||||||
|
if (/^\.?\//.test(result)) {
|
||||||
|
result = new URL(
|
||||||
|
result.replace(/^\.?\/+/, ""),
|
||||||
|
window?.location?.origin,
|
||||||
|
).toString();
|
||||||
|
}
|
||||||
|
|
||||||
|
// ensure there is a trailing slash, otherwise url won't be correctly concatenated
|
||||||
|
result = `${result.replace(/\/+$/, "")}/`;
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
}
|
||||||
@ -0,0 +1,131 @@
|
|||||||
|
import {
|
||||||
|
WorkerInTheMainChunkError,
|
||||||
|
WorkerUrlNotDefinedError,
|
||||||
|
} from "../../errors";
|
||||||
|
import { isServerEnv, promiseTry } from "../../utils";
|
||||||
|
import { WorkerPool } from "../../workers";
|
||||||
|
import type { Commands } from "./subset-shared.chunk";
|
||||||
|
|
||||||
|
let shouldUseWorkers = typeof Worker !== "undefined";
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Tries to subset glyphs in a font based on the used codepoints, returning the font as dataurl.
|
||||||
|
* Under the hood utilizes worker threads (Web Workers, if available), otherwise fallbacks to the main thread.
|
||||||
|
*
|
||||||
|
* Check the following diagram for details: link.excalidraw.com/readonly/MbbnWPSWXgadXdtmzgeO
|
||||||
|
*
|
||||||
|
* @param arrayBuffer font data buffer in the woff2 format
|
||||||
|
* @param codePoints codepoints used to subset the glyphs
|
||||||
|
*
|
||||||
|
* @returns font with subsetted glyphs (all glyphs in case of errors) converted into a dataurl
|
||||||
|
*/
|
||||||
|
export const subsetWoff2GlyphsByCodepoints = async (
|
||||||
|
arrayBuffer: ArrayBuffer,
|
||||||
|
codePoints: Array<number>,
|
||||||
|
): Promise<string> => {
|
||||||
|
const { Commands, subsetToBase64, toBase64 } =
|
||||||
|
await lazyLoadSharedSubsetChunk();
|
||||||
|
|
||||||
|
if (!shouldUseWorkers) {
|
||||||
|
return subsetToBase64(arrayBuffer, codePoints);
|
||||||
|
}
|
||||||
|
|
||||||
|
return promiseTry(async () => {
|
||||||
|
try {
|
||||||
|
const workerPool = await getOrCreateWorkerPool();
|
||||||
|
// copy the buffer to avoid working on top of the detached array buffer in the fallback
|
||||||
|
// i.e. in case the worker throws, the array buffer does not get automatically detached, even if the worker is terminated
|
||||||
|
const arrayBufferCopy = arrayBuffer.slice(0);
|
||||||
|
const result = await workerPool.postMessage(
|
||||||
|
{
|
||||||
|
command: Commands.Subset,
|
||||||
|
arrayBuffer: arrayBufferCopy,
|
||||||
|
codePoints,
|
||||||
|
} as const,
|
||||||
|
{ transfer: [arrayBufferCopy] },
|
||||||
|
);
|
||||||
|
|
||||||
|
// encode on the main thread to avoid copying large binary strings (as dataurl) between threads
|
||||||
|
return toBase64(result);
|
||||||
|
} catch (e) {
|
||||||
|
// don't use workers if they are failing
|
||||||
|
shouldUseWorkers = false;
|
||||||
|
|
||||||
|
if (
|
||||||
|
// don't log the expected errors server-side
|
||||||
|
!(
|
||||||
|
isServerEnv() &&
|
||||||
|
(e instanceof WorkerUrlNotDefinedError ||
|
||||||
|
e instanceof WorkerInTheMainChunkError)
|
||||||
|
)
|
||||||
|
) {
|
||||||
|
// eslint-disable-next-line no-console
|
||||||
|
console.error(
|
||||||
|
"Failed to use workers for subsetting, falling back to the main thread.",
|
||||||
|
e,
|
||||||
|
);
|
||||||
|
}
|
||||||
|
|
||||||
|
// fallback to the main thread
|
||||||
|
return subsetToBase64(arrayBuffer, codePoints);
|
||||||
|
}
|
||||||
|
});
|
||||||
|
};
|
||||||
|
|
||||||
|
// lazy-loaded and cached chunks
|
||||||
|
let subsetWorker: Promise<typeof import("./subset-worker.chunk")> | null = null;
|
||||||
|
let subsetShared: Promise<typeof import("./subset-shared.chunk")> | null = null;
|
||||||
|
|
||||||
|
const lazyLoadWorkerSubsetChunk = async () => {
|
||||||
|
if (!subsetWorker) {
|
||||||
|
subsetWorker = import("./subset-worker.chunk");
|
||||||
|
}
|
||||||
|
|
||||||
|
return subsetWorker;
|
||||||
|
};
|
||||||
|
|
||||||
|
const lazyLoadSharedSubsetChunk = async () => {
|
||||||
|
if (!subsetShared) {
|
||||||
|
// load dynamically to force create a shared chunk reused between main thread and the worker thread
|
||||||
|
subsetShared = import("./subset-shared.chunk");
|
||||||
|
}
|
||||||
|
|
||||||
|
return subsetShared;
|
||||||
|
};
|
||||||
|
|
||||||
|
// could be extended with multiple commands in the future
|
||||||
|
type SubsetWorkerData = {
|
||||||
|
command: typeof Commands.Subset;
|
||||||
|
arrayBuffer: ArrayBuffer;
|
||||||
|
codePoints: Array<number>;
|
||||||
|
};
|
||||||
|
|
||||||
|
type SubsetWorkerResult<T extends SubsetWorkerData["command"]> =
|
||||||
|
T extends typeof Commands.Subset ? ArrayBuffer : never;
|
||||||
|
|
||||||
|
let workerPool: Promise<
|
||||||
|
WorkerPool<SubsetWorkerData, SubsetWorkerResult<SubsetWorkerData["command"]>>
|
||||||
|
> | null = null;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Lazy initialize or get the worker pool singleton.
|
||||||
|
*
|
||||||
|
* @throws implicitly if anything goes wrong - worker pool creation, loading wasm, initializing worker, etc.
|
||||||
|
*/
|
||||||
|
const getOrCreateWorkerPool = () => {
|
||||||
|
if (!workerPool) {
|
||||||
|
// immediate concurrent-friendly return, to ensure we have only one pool instance
|
||||||
|
workerPool = promiseTry(async () => {
|
||||||
|
const { WorkerUrl } = await lazyLoadWorkerSubsetChunk();
|
||||||
|
|
||||||
|
const pool = WorkerPool.create<
|
||||||
|
SubsetWorkerData,
|
||||||
|
SubsetWorkerResult<SubsetWorkerData["command"]>
|
||||||
|
>(WorkerUrl);
|
||||||
|
|
||||||
|
return pool;
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
return workerPool;
|
||||||
|
};
|
||||||
@ -0,0 +1,81 @@
|
|||||||
|
/**
|
||||||
|
* DON'T depend on anything from the outside like `promiseTry`, as this module is part of a separate lazy-loaded chunk.
|
||||||
|
*
|
||||||
|
* Including anything from the main chunk would include the whole chunk by default.
|
||||||
|
* Even it it would be tree-shaken during build, it won't be tree-shaken in dev.
|
||||||
|
*
|
||||||
|
* In the future consider separating common utils into a separate shared chunk.
|
||||||
|
*/
|
||||||
|
|
||||||
|
import loadWoff2 from "../wasm/woff2-loader";
|
||||||
|
import loadHbSubset from "../wasm/hb-subset-loader";
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Shared commands between the main thread and worker threads.
|
||||||
|
*/
|
||||||
|
export const Commands = {
|
||||||
|
Subset: "SUBSET",
|
||||||
|
} as const;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Used by browser (main thread), node and jsdom, to subset the font based on the passed codepoints.
|
||||||
|
*
|
||||||
|
* @returns woff2 font as a base64 encoded string
|
||||||
|
*/
|
||||||
|
export const subsetToBase64 = async (
|
||||||
|
arrayBuffer: ArrayBuffer,
|
||||||
|
codePoints: Array<number>,
|
||||||
|
): Promise<string> => {
|
||||||
|
try {
|
||||||
|
const buffer = await subsetToBinary(arrayBuffer, codePoints);
|
||||||
|
return toBase64(buffer);
|
||||||
|
} catch (e) {
|
||||||
|
console.error("Skipped glyph subsetting", e);
|
||||||
|
// Fallback to encoding whole font in case of errors
|
||||||
|
return toBase64(arrayBuffer);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Used by browser (worker thread) and as part of `subsetToBase64`, to subset the font based on the passed codepoints.
|
||||||
|
*
|
||||||
|
* @eturns woff2 font as an ArrayBuffer, to avoid copying large strings between worker threads and the main thread.
|
||||||
|
*/
|
||||||
|
export const subsetToBinary = async (
|
||||||
|
arrayBuffer: ArrayBuffer,
|
||||||
|
codePoints: Array<number>,
|
||||||
|
): Promise<ArrayBuffer> => {
|
||||||
|
// lazy loaded wasm modules to avoid multiple initializations in case of concurrent triggers
|
||||||
|
// IMPORTANT: could be expensive, as each new worker instance lazy loads these to their own memory ~ keep the # of workes small!
|
||||||
|
const { compress, decompress } = await loadWoff2();
|
||||||
|
const { subset } = await loadHbSubset();
|
||||||
|
|
||||||
|
const decompressedBinary = decompress(arrayBuffer).buffer;
|
||||||
|
const snftSubset = subset(decompressedBinary, new Set(codePoints));
|
||||||
|
const compressedBinary = compress(snftSubset.buffer);
|
||||||
|
|
||||||
|
return compressedBinary.buffer;
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Util for isomoprhic browser (main thread), node and jsdom usage.
|
||||||
|
*
|
||||||
|
* Isn't used inside the worker to avoid copying large binary strings (as dataurl) between worker threads and the main thread.
|
||||||
|
*/
|
||||||
|
export const toBase64 = async (arrayBuffer: ArrayBuffer) => {
|
||||||
|
let base64: string;
|
||||||
|
|
||||||
|
if (typeof Buffer !== "undefined") {
|
||||||
|
// node, jsdom
|
||||||
|
base64 = Buffer.from(arrayBuffer).toString("base64");
|
||||||
|
} else {
|
||||||
|
// browser (main thread)
|
||||||
|
// it's perfectly fine to treat each byte independently,
|
||||||
|
// as we care only about turning individual bytes into codepoints,
|
||||||
|
// not about multi-byte unicode characters
|
||||||
|
const byteString = String.fromCharCode(...new Uint8Array(arrayBuffer));
|
||||||
|
base64 = btoa(byteString);
|
||||||
|
}
|
||||||
|
|
||||||
|
return `data:font/woff2;base64,${base64}`;
|
||||||
|
};
|
||||||
@ -0,0 +1,42 @@
|
|||||||
|
/**
|
||||||
|
* DON'T depend on anything from the outside like `promiseTry`, as this module is part of a separate lazy-loaded chunk.
|
||||||
|
*
|
||||||
|
* Including anything from the main chunk would include the whole chunk by default.
|
||||||
|
* Even it it would be tree-shaken during build, it won't be tree-shaken in dev.
|
||||||
|
*
|
||||||
|
* In the future consider separating common utils into a separate shared chunk.
|
||||||
|
*/
|
||||||
|
|
||||||
|
import { Commands, subsetToBinary } from "./subset-shared.chunk";
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Due to this export (and related dynamic import), this worker code will be included in the bundle automatically (as a separate chunk),
|
||||||
|
* without the need for esbuild / vite /rollup plugins and special browser / server treatment.
|
||||||
|
*
|
||||||
|
* `import.meta.url` is undefined in nodejs
|
||||||
|
*/
|
||||||
|
export const WorkerUrl: URL | undefined = import.meta.url
|
||||||
|
? new URL(import.meta.url)
|
||||||
|
: undefined;
|
||||||
|
|
||||||
|
// run only in the worker context
|
||||||
|
if (typeof window === "undefined" && typeof self !== "undefined") {
|
||||||
|
self.onmessage = async (e: {
|
||||||
|
data: {
|
||||||
|
command: typeof Commands.Subset;
|
||||||
|
arrayBuffer: ArrayBuffer;
|
||||||
|
codePoints: Array<number>;
|
||||||
|
};
|
||||||
|
}) => {
|
||||||
|
switch (e.data.command) {
|
||||||
|
case Commands.Subset:
|
||||||
|
const buffer = await subsetToBinary(
|
||||||
|
e.data.arrayBuffer,
|
||||||
|
e.data.codePoints,
|
||||||
|
);
|
||||||
|
|
||||||
|
self.postMessage(buffer, { transfer: [buffer] });
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
}
|
||||||
@ -0,0 +1,57 @@
|
|||||||
|
/**
|
||||||
|
* DON'T depend on anything from the outside like `promiseTry`, as this module is part of a separate lazy-loaded chunk.
|
||||||
|
*
|
||||||
|
* Including anything from the main chunk would include the whole chunk by default.
|
||||||
|
* Even it it would be tree-shaken during build, it won't be tree-shaken in dev.
|
||||||
|
*
|
||||||
|
* In the future consider separating common utils into a separate shared chunk.
|
||||||
|
*/
|
||||||
|
|
||||||
|
import binary from "./hb-subset-wasm";
|
||||||
|
import bindings from "./hb-subset-bindings";
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Lazy loads wasm and respective bindings for font subsetting based on the harfbuzzjs.
|
||||||
|
*/
|
||||||
|
let loadedWasm: ReturnType<typeof load> | null = null;
|
||||||
|
|
||||||
|
// TODO: consider adding support for fetching the wasm from an URL (external CDN, data URL, etc.)
|
||||||
|
const load = (): Promise<{
|
||||||
|
subset: (
|
||||||
|
fontBuffer: ArrayBuffer,
|
||||||
|
codePoints: ReadonlySet<number>,
|
||||||
|
) => Uint8Array;
|
||||||
|
}> => {
|
||||||
|
return new Promise(async (resolve, reject) => {
|
||||||
|
try {
|
||||||
|
const module = await WebAssembly.instantiate(binary);
|
||||||
|
const harfbuzzJsWasm = module.instance.exports;
|
||||||
|
// @ts-expect-error since `.buffer` is custom prop
|
||||||
|
const heapu8 = new Uint8Array(harfbuzzJsWasm.memory.buffer);
|
||||||
|
|
||||||
|
const hbSubset = {
|
||||||
|
subset: (fontBuffer: ArrayBuffer, codePoints: ReadonlySet<number>) => {
|
||||||
|
return bindings.subset(
|
||||||
|
harfbuzzJsWasm,
|
||||||
|
heapu8,
|
||||||
|
fontBuffer,
|
||||||
|
codePoints,
|
||||||
|
);
|
||||||
|
},
|
||||||
|
};
|
||||||
|
|
||||||
|
resolve(hbSubset);
|
||||||
|
} catch (e) {
|
||||||
|
reject(e);
|
||||||
|
}
|
||||||
|
});
|
||||||
|
};
|
||||||
|
|
||||||
|
// lazy load the default export
|
||||||
|
export default (): ReturnType<typeof load> => {
|
||||||
|
if (!loadedWasm) {
|
||||||
|
loadedWasm = load();
|
||||||
|
}
|
||||||
|
|
||||||
|
return loadedWasm;
|
||||||
|
};
|
||||||
@ -1,58 +0,0 @@
|
|||||||
/**
|
|
||||||
* Lazy loads wasm and respective bindings for font subsetting based on the harfbuzzjs.
|
|
||||||
*/
|
|
||||||
let loadedWasm: ReturnType<typeof load> | null = null;
|
|
||||||
|
|
||||||
// TODO: add support for fetching the wasm from an URL (external CDN, data URL, etc.)
|
|
||||||
const load = (): Promise<{
|
|
||||||
subset: (
|
|
||||||
fontBuffer: ArrayBuffer,
|
|
||||||
codePoints: ReadonlySet<number>,
|
|
||||||
) => Uint8Array;
|
|
||||||
}> => {
|
|
||||||
return new Promise(async (resolve, reject) => {
|
|
||||||
try {
|
|
||||||
const [binary, bindings] = await Promise.all([
|
|
||||||
import("./hb-subset.wasm"),
|
|
||||||
import("./hb-subset.bindings"),
|
|
||||||
]);
|
|
||||||
|
|
||||||
WebAssembly.instantiate(binary.default).then((module) => {
|
|
||||||
try {
|
|
||||||
const harfbuzzJsWasm = module.instance.exports;
|
|
||||||
// @ts-expect-error since `.buffer` is custom prop
|
|
||||||
const heapu8 = new Uint8Array(harfbuzzJsWasm.memory.buffer);
|
|
||||||
|
|
||||||
const hbSubset = {
|
|
||||||
subset: (
|
|
||||||
fontBuffer: ArrayBuffer,
|
|
||||||
codePoints: ReadonlySet<number>,
|
|
||||||
) => {
|
|
||||||
return bindings.default.subset(
|
|
||||||
harfbuzzJsWasm,
|
|
||||||
heapu8,
|
|
||||||
fontBuffer,
|
|
||||||
codePoints,
|
|
||||||
);
|
|
||||||
},
|
|
||||||
};
|
|
||||||
|
|
||||||
resolve(hbSubset);
|
|
||||||
} catch (e) {
|
|
||||||
reject(e);
|
|
||||||
}
|
|
||||||
});
|
|
||||||
} catch (error) {
|
|
||||||
reject(error);
|
|
||||||
}
|
|
||||||
});
|
|
||||||
};
|
|
||||||
|
|
||||||
// lazy load the default export
|
|
||||||
export default (): ReturnType<typeof load> => {
|
|
||||||
if (!loadedWasm) {
|
|
||||||
loadedWasm = load();
|
|
||||||
}
|
|
||||||
|
|
||||||
return loadedWasm;
|
|
||||||
};
|
|
||||||
@ -0,0 +1,76 @@
|
|||||||
|
/**
|
||||||
|
* DON'T depend on anything from the outside like `promiseTry`, as this module is part of a separate lazy-loaded chunk.
|
||||||
|
*
|
||||||
|
* Including anything from the main chunk would include the whole chunk by default.
|
||||||
|
* Even it it would be tree-shaken during build, it won't be tree-shaken in dev.
|
||||||
|
*
|
||||||
|
* In the future consider separating common utils into a separate shared chunk.
|
||||||
|
*/
|
||||||
|
|
||||||
|
import binary from "./woff2-wasm";
|
||||||
|
import bindings from "./woff2-bindings";
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Lazy loads wasm and respective bindings for woff2 compression and decompression.
|
||||||
|
*/
|
||||||
|
type Vector = any;
|
||||||
|
|
||||||
|
let loadedWasm: ReturnType<typeof load> | null = null;
|
||||||
|
|
||||||
|
// re-map from internal vector into byte array
|
||||||
|
function convertFromVecToUint8Array(vector: Vector): Uint8Array {
|
||||||
|
const arr = [];
|
||||||
|
for (let i = 0, l = vector.size(); i < l; i++) {
|
||||||
|
arr.push(vector.get(i));
|
||||||
|
}
|
||||||
|
|
||||||
|
return new Uint8Array(arr);
|
||||||
|
}
|
||||||
|
|
||||||
|
// TODO: consider adding support for fetching the wasm from an URL (external CDN, data URL, etc.)
|
||||||
|
const load = (): Promise<{
|
||||||
|
compress: (buffer: ArrayBuffer) => Uint8Array;
|
||||||
|
decompress: (buffer: ArrayBuffer) => Uint8Array;
|
||||||
|
}> => {
|
||||||
|
return new Promise((resolve, reject) => {
|
||||||
|
try {
|
||||||
|
// initializing the module manually, so that we could pass in the wasm binary
|
||||||
|
// note that the `bindings.then` is not not promise/A+ compliant, hence the need for another explicit try/catch
|
||||||
|
bindings({ wasmBinary: binary }).then(
|
||||||
|
(module: {
|
||||||
|
woff2Enc: (buffer: ArrayBuffer, byteLength: number) => Vector;
|
||||||
|
woff2Dec: (buffer: ArrayBuffer, byteLength: number) => Vector;
|
||||||
|
}) => {
|
||||||
|
try {
|
||||||
|
// re-exporting only compress and decompress functions (also avoids infinite loop inside emscripten bindings)
|
||||||
|
const woff2 = {
|
||||||
|
compress: (buffer: ArrayBuffer) =>
|
||||||
|
convertFromVecToUint8Array(
|
||||||
|
module.woff2Enc(buffer, buffer.byteLength),
|
||||||
|
),
|
||||||
|
decompress: (buffer: ArrayBuffer) =>
|
||||||
|
convertFromVecToUint8Array(
|
||||||
|
module.woff2Dec(buffer, buffer.byteLength),
|
||||||
|
),
|
||||||
|
};
|
||||||
|
|
||||||
|
resolve(woff2);
|
||||||
|
} catch (e) {
|
||||||
|
reject(e);
|
||||||
|
}
|
||||||
|
},
|
||||||
|
);
|
||||||
|
} catch (e) {
|
||||||
|
reject(e);
|
||||||
|
}
|
||||||
|
});
|
||||||
|
};
|
||||||
|
|
||||||
|
// lazy loaded default export
|
||||||
|
export default (): ReturnType<typeof load> => {
|
||||||
|
if (!loadedWasm) {
|
||||||
|
loadedWasm = load();
|
||||||
|
}
|
||||||
|
|
||||||
|
return loadedWasm;
|
||||||
|
};
|
||||||
@ -1,70 +0,0 @@
|
|||||||
/**
|
|
||||||
* Lazy loads wasm and respective bindings for woff2 compression and decompression.
|
|
||||||
*/
|
|
||||||
type Vector = any;
|
|
||||||
|
|
||||||
let loadedWasm: ReturnType<typeof load> | null = null;
|
|
||||||
|
|
||||||
// TODO: add support for fetching the wasm from an URL (external CDN, data URL, etc.)
|
|
||||||
const load = (): Promise<{
|
|
||||||
compress: (buffer: ArrayBuffer) => Uint8Array;
|
|
||||||
decompress: (buffer: ArrayBuffer) => Uint8Array;
|
|
||||||
}> => {
|
|
||||||
return new Promise(async (resolve, reject) => {
|
|
||||||
try {
|
|
||||||
const [binary, bindings] = await Promise.all([
|
|
||||||
import("./woff2.wasm"),
|
|
||||||
import("./woff2.bindings"),
|
|
||||||
]);
|
|
||||||
|
|
||||||
// initializing the module manually, so that we could pass in the wasm binary
|
|
||||||
bindings
|
|
||||||
.default({ wasmBinary: binary.default })
|
|
||||||
.then(
|
|
||||||
(module: {
|
|
||||||
woff2Enc: (buffer: ArrayBuffer, byteLength: number) => Vector;
|
|
||||||
woff2Dec: (buffer: ArrayBuffer, byteLength: number) => Vector;
|
|
||||||
}) => {
|
|
||||||
try {
|
|
||||||
// re-map from internal vector into byte array
|
|
||||||
function convertFromVecToUint8Array(vector: Vector): Uint8Array {
|
|
||||||
const arr = [];
|
|
||||||
for (let i = 0, l = vector.size(); i < l; i++) {
|
|
||||||
arr.push(vector.get(i));
|
|
||||||
}
|
|
||||||
|
|
||||||
return new Uint8Array(arr);
|
|
||||||
}
|
|
||||||
|
|
||||||
// re-exporting only compress and decompress functions (also avoids infinite loop inside emscripten bindings)
|
|
||||||
const woff2 = {
|
|
||||||
compress: (buffer: ArrayBuffer) =>
|
|
||||||
convertFromVecToUint8Array(
|
|
||||||
module.woff2Enc(buffer, buffer.byteLength),
|
|
||||||
),
|
|
||||||
decompress: (buffer: ArrayBuffer) =>
|
|
||||||
convertFromVecToUint8Array(
|
|
||||||
module.woff2Dec(buffer, buffer.byteLength),
|
|
||||||
),
|
|
||||||
};
|
|
||||||
|
|
||||||
resolve(woff2);
|
|
||||||
} catch (e) {
|
|
||||||
reject(e);
|
|
||||||
}
|
|
||||||
},
|
|
||||||
);
|
|
||||||
} catch (e) {
|
|
||||||
reject(e);
|
|
||||||
}
|
|
||||||
});
|
|
||||||
};
|
|
||||||
|
|
||||||
// lazy loaded default export
|
|
||||||
export default (): ReturnType<typeof load> => {
|
|
||||||
if (!loadedWasm) {
|
|
||||||
loadedWasm = load();
|
|
||||||
}
|
|
||||||
|
|
||||||
return loadedWasm;
|
|
||||||
};
|
|
||||||
@ -0,0 +1,8 @@
|
|||||||
|
import CascadiaCodeRegular from "./CascadiaCode-Regular.woff2";
|
||||||
|
import { type ExcalidrawFontFaceDescriptor } from "../..";
|
||||||
|
|
||||||
|
export const CascadiaFontFaces: ExcalidrawFontFaceDescriptor[] = [
|
||||||
|
{
|
||||||
|
uri: CascadiaCodeRegular,
|
||||||
|
},
|
||||||
|
];
|
||||||
@ -0,0 +1,8 @@
|
|||||||
|
import ComicShannsRegular from "./ComicShanns-Regular.woff2";
|
||||||
|
import { type ExcalidrawFontFaceDescriptor } from "../..";
|
||||||
|
|
||||||
|
export const ComicFontFaces: ExcalidrawFontFaceDescriptor[] = [
|
||||||
|
{
|
||||||
|
uri: ComicShannsRegular,
|
||||||
|
},
|
||||||
|
];
|
||||||
@ -0,0 +1,8 @@
|
|||||||
|
import { LOCAL_FONT_PROTOCOL } from "../../metadata";
|
||||||
|
import { type ExcalidrawFontFaceDescriptor } from "../..";
|
||||||
|
|
||||||
|
export const EmojiFontFaces: ExcalidrawFontFaceDescriptor[] = [
|
||||||
|
{
|
||||||
|
uri: LOCAL_FONT_PROTOCOL,
|
||||||
|
},
|
||||||
|
];
|
||||||
@ -0,0 +1,8 @@
|
|||||||
|
import Excalifont from "./Excalifont-Regular.woff2";
|
||||||
|
import { type ExcalidrawFontFaceDescriptor } from "../..";
|
||||||
|
|
||||||
|
export const ExcalifontFontFaces: ExcalidrawFontFaceDescriptor[] = [
|
||||||
|
{
|
||||||
|
uri: Excalifont,
|
||||||
|
},
|
||||||
|
];
|
||||||
@ -0,0 +1,8 @@
|
|||||||
|
import { LOCAL_FONT_PROTOCOL } from "../../metadata";
|
||||||
|
import { type ExcalidrawFontFaceDescriptor } from "../..";
|
||||||
|
|
||||||
|
export const HelveticaFontFaces: ExcalidrawFontFaceDescriptor[] = [
|
||||||
|
{
|
||||||
|
uri: LOCAL_FONT_PROTOCOL,
|
||||||
|
},
|
||||||
|
];
|
||||||
@ -0,0 +1,8 @@
|
|||||||
|
import LiberationSansRegular from "./LiberationSans-Regular.woff2";
|
||||||
|
import { type ExcalidrawFontFaceDescriptor } from "../..";
|
||||||
|
|
||||||
|
export const LiberationFontFaces: ExcalidrawFontFaceDescriptor[] = [
|
||||||
|
{
|
||||||
|
uri: LiberationSansRegular,
|
||||||
|
},
|
||||||
|
];
|
||||||
@ -0,0 +1,16 @@
|
|||||||
|
import LilitaLatin from "./Lilita-Regular-i7dPIFZ9Zz-WBtRtedDbYEF8RXi4EwQ.woff2";
|
||||||
|
import LilitaLatinExt from "./Lilita-Regular-i7dPIFZ9Zz-WBtRtedDbYE98RXi4EwSsbg.woff2";
|
||||||
|
|
||||||
|
import { GOOGLE_FONTS_RANGES } from "../../metadata";
|
||||||
|
import { type ExcalidrawFontFaceDescriptor } from "../..";
|
||||||
|
|
||||||
|
export const LilitaFontFaces: ExcalidrawFontFaceDescriptor[] = [
|
||||||
|
{
|
||||||
|
uri: LilitaLatinExt,
|
||||||
|
descriptors: { unicodeRange: GOOGLE_FONTS_RANGES.LATIN_EXT },
|
||||||
|
},
|
||||||
|
{
|
||||||
|
uri: LilitaLatin,
|
||||||
|
descriptors: { unicodeRange: GOOGLE_FONTS_RANGES.LATIN },
|
||||||
|
},
|
||||||
|
];
|
||||||
@ -0,0 +1,37 @@
|
|||||||
|
import Latin from "./Nunito-Regular-XRXI3I6Li01BKofiOc5wtlZ2di8HDIkhdTQ3j6zbXWjgeg.woff2";
|
||||||
|
import LatinExt from "./Nunito-Regular-XRXI3I6Li01BKofiOc5wtlZ2di8HDIkhdTo3j6zbXWjgevT5.woff2";
|
||||||
|
import Cyrilic from "./Nunito-Regular-XRXI3I6Li01BKofiOc5wtlZ2di8HDIkhdTA3j6zbXWjgevT5.woff2";
|
||||||
|
import CyrilicExt from "./Nunito-Regular-XRXI3I6Li01BKofiOc5wtlZ2di8HDIkhdTk3j6zbXWjgevT5.woff2";
|
||||||
|
import Vietnamese from "./Nunito-Regular-XRXI3I6Li01BKofiOc5wtlZ2di8HDIkhdTs3j6zbXWjgevT5.woff2";
|
||||||
|
|
||||||
|
import { GOOGLE_FONTS_RANGES } from "../../metadata";
|
||||||
|
import { type ExcalidrawFontFaceDescriptor } from "../..";
|
||||||
|
|
||||||
|
export const NunitoFontFaces: ExcalidrawFontFaceDescriptor[] = [
|
||||||
|
{
|
||||||
|
uri: CyrilicExt,
|
||||||
|
descriptors: {
|
||||||
|
unicodeRange: GOOGLE_FONTS_RANGES.CYRILIC_EXT,
|
||||||
|
weight: "500",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
uri: Cyrilic,
|
||||||
|
descriptors: { unicodeRange: GOOGLE_FONTS_RANGES.CYRILIC, weight: "500" },
|
||||||
|
},
|
||||||
|
{
|
||||||
|
uri: Vietnamese,
|
||||||
|
descriptors: {
|
||||||
|
unicodeRange: GOOGLE_FONTS_RANGES.VIETNAMESE,
|
||||||
|
weight: "500",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
uri: LatinExt,
|
||||||
|
descriptors: { unicodeRange: GOOGLE_FONTS_RANGES.LATIN_EXT, weight: "500" },
|
||||||
|
},
|
||||||
|
{
|
||||||
|
uri: Latin,
|
||||||
|
descriptors: { unicodeRange: GOOGLE_FONTS_RANGES.LATIN, weight: "500" },
|
||||||
|
},
|
||||||
|
];
|
||||||
@ -0,0 +1,8 @@
|
|||||||
|
import Virgil from "./Virgil-Regular.woff2";
|
||||||
|
import { type ExcalidrawFontFaceDescriptor } from "../..";
|
||||||
|
|
||||||
|
export const VirgilFontFaces: ExcalidrawFontFaceDescriptor[] = [
|
||||||
|
{
|
||||||
|
uri: Virgil,
|
||||||
|
},
|
||||||
|
];
|
||||||
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Some files were not shown because too many files have changed in this diff Show More
Loading…
Reference in New Issue