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Use the FeatureTest helper in the src/display/font_loader.js file

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This commit is contained in:
Jonas Jenwald 2025-02-06 20:45:18 +01:00
parent 41a918b0fe
commit 33f3506842
1 changed files with 9 additions and 17 deletions
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26
src/display/font_loader.js
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@ -15,6 +15,7 @@
import { import {
assert, assert,
FeatureTest,
isNodeJS, isNodeJS,
shadow, shadow,
string32, string32,
@ -176,23 +177,14 @@ class FontLoader {
return shadow(this, "isSyncFontLoadingSupported", true); return shadow(this, "isSyncFontLoadingSupported", true);
} }
let supported = false; // Node.js - we can pretend that sync font loading is supported.
if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("CHROME")) { // Firefox, from version 14, supports synchronous font loading.
if (isNodeJS) { return shadow(
// Node.js - we can pretend that sync font loading is supported. this,
supported = true; "isSyncFontLoadingSupported",
} else if ( (typeof PDFJSDev === "undefined" || !PDFJSDev.test("CHROME")) &&
typeof navigator !== "undefined" && (isNodeJS || FeatureTest.platform.isFirefox)
typeof navigator?.userAgent === "string" && );
// 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.
/Mozilla\/5.0.*?rv:\d+.*? Gecko/.test(navigator.userAgent)
) {
// Firefox, from version 14, supports synchronous font loading.
supported = true;
}
}
return shadow(this, "isSyncFontLoadingSupported", supported);
} }
_queueLoadingCallback(callback) { _queueLoadingCallback(callback) {