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Fixes WeakMap polyfill (and improves PDFWorker port check).

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This commit is contained in:
Yury Delendik 2017-06-13 09:16:12 -05:00
parent e5ac64f81f
commit 631e6bebff
2 changed files with 7 additions and 3 deletions
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2
src/display/api.js
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@ -1232,7 +1232,7 @@ var PDFWorker = (function PDFWorkerClosure() {
let pdfWorkerPorts = new WeakMap(); let pdfWorkerPorts = new WeakMap();
function PDFWorker(name, port) { function PDFWorker(name, port) {
if (pdfWorkerPorts.has(port)) { if (port && pdfWorkerPorts.has(port)) {
throw new Error('Cannot use more than one PDFWorker per port'); throw new Error('Cannot use more than one PDFWorker per port');
} }

8
src/shared/compatibility.js
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@ -1176,10 +1176,14 @@ PDFJS.compatibilityChecked = true;
} }
WeakMap.prototype = { WeakMap.prototype = {
has(obj) { has(obj) {
if ((typeof obj !== 'object' && typeof obj !== 'function') ||
obj === null) {
return false;
}
return !!Object.getOwnPropertyDescriptor(obj, this.id); return !!Object.getOwnPropertyDescriptor(obj, this.id);
}, },
get(obj, defaultValue) { get(obj) {
return this.has(obj) ? obj[this.id] : defaultValue; return this.has(obj) ? obj[this.id] : undefined;
}, },
set(obj, value) { set(obj, value) {
Object.defineProperty(obj, this.id, { Object.defineProperty(obj, this.id, {