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Change the CompiledFont glyph/charCode caches to use Maps

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This code is old enough that it predates the general availability of `Map`, and these changes allow us to shorten the code a tiny bit.
This commit is contained in:
Jonas Jenwald 2026-07-18 11:44:27 +02:00
parent dd7e3731d1
commit b2cf8527c6
1 changed files with 15 additions and 18 deletions
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33
src/core/font_renderer.js
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@ -781,6 +781,10 @@ class Commands {
}
class CompiledFont {
#compiledGlyphs = new Map();
#compiledCharCodeToGlyphId = new Map();
constructor(fontMatrix) {
if (
(typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) &&
@ -789,9 +793,6 @@ class CompiledFont {
unreachable("Cannot initialize CompiledFont.");
}
this.fontMatrix = fontMatrix;
this.compiledGlyphs = Object.create(null);
this.compiledCharCodeToGlyphId = Object.create(null);
}
static get NOOP() {
@ -807,24 +808,20 @@ class CompiledFont {
getPathJs(unicode) {
const { charCode, glyphId } = lookupCmap(this.cmap, unicode);
let fn = this.compiledGlyphs[glyphId],
compileEx;
if (fn === undefined) {
const path = this.#compiledGlyphs.getOrInsertComputed(glyphId, () => {
try {
fn = this.compileGlyph(this.glyphs[glyphId], glyphId);
return this.compileGlyph(this.glyphs[glyphId], glyphId);
} catch (ex) {
fn = CompiledFont.NOOP; // Avoid attempting to re-compile a corrupt glyph.
compileEx = ex;
return ex; // Avoid attempting to re-compile a corrupt glyph.
}
this.compiledGlyphs[glyphId] = fn;
}
this.compiledCharCodeToGlyphId[charCode] ??= glyphId;
});
this.#compiledCharCodeToGlyphId.getOrInsert(charCode, glyphId);
if (compileEx) {
throw compileEx;
if (path instanceof Error) {
throw path;
}
return fn;
return path;
}
compileGlyph(code, glyphId) {
@ -861,8 +858,8 @@ class CompiledFont {
hasBuiltPath(unicode) {
const { charCode, glyphId } = lookupCmap(this.cmap, unicode);
return (
this.compiledGlyphs[glyphId] !== undefined &&
this.compiledCharCodeToGlyphId[charCode] !== undefined
this.#compiledGlyphs.has(glyphId) &&
this.#compiledCharCodeToGlyphId.has(charCode)
);
}
}