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Merge pull request #15751 from Snuffleupagus/modernize-isSyncFontLoadingSupported

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Slightly modernize the `FontLoader.isSyncFontLoadingSupported` getter
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Tim van der Meij 2022-11-27 13:48:54 +01:00 committed by GitHub
commit 8bac57172a
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1 changed files with 8 additions and 7 deletions
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15
src/display/font_loader.js
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@ -22,6 +22,7 @@ import {
UNSUPPORTED_FEATURES, UNSUPPORTED_FEATURES,
warn, warn,
} from "../shared/util.js"; } from "../shared/util.js";
import { isNodeJS } from "../shared/is_node.js";
class FontLoader { class FontLoader {
constructor({ constructor({
@ -141,17 +142,17 @@ class FontLoader {
let supported = false; let supported = false;
if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("CHROME")) { if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("CHROME")) {
if (typeof navigator === "undefined") { if (isNodeJS) {
// Node.js - we can pretend that sync font loading is supported. // Node.js - we can pretend that sync font loading is supported.
supported = true; supported = true;
} else { } else if (
typeof navigator !== "undefined" &&
// User agent string sniffing is bad, but there is no reliable way to // User agent string sniffing is bad, but there is no reliable way to
// tell if the font is fully loaded and ready to be used with canvas. // tell if the font is fully loaded and ready to be used with canvas.
const m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(navigator.userAgent); /Mozilla\/5.0.*?rv:\d+.*? Gecko/.test(navigator.userAgent)
if (m?.[1] >= 14) { ) {
supported = true; // Firefox, from version 14, supports synchronous font loading.
} supported = true;
// TODO - other browsers...
} }
} }
return shadow(this, "isSyncFontLoadingSupported", supported); return shadow(this, "isSyncFontLoadingSupported", supported);