Sakurai/pdf.js
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #16191 from Snuffleupagus/XRefStm-Set

Browse Source 
Track previous "XRefStm"s in a `Set`, rather than an `Object`
This commit is contained in:
Jonas Jenwald 2023-03-22 10:25:53 +01:00 committed by GitHub
commit f39ff20485
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 6 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/core/xref.js
View File

@ -37,7 +37,7 @@ class XRef {
this.stream = stream;
this.pdfManager = pdfManager;
this.entries = [];
this.xrefstms = Object.create(null);
this._xrefStms = new Set();
this._cacheMap = new Map(); // Prepare the XRef cache.
this._pendingRefs = new RefSet();
this._newPersistentRefNum = null;
@ -540,7 +540,7 @@ class XRef {
const xrefTagOffset = skipUntil(content, 0, xrefBytes);
if (xrefTagOffset < contentLength && content[xrefTagOffset + 5] < 64) {
xrefStms.push(position - stream.start);
this.xrefstms[position - stream.start] = 1; // Avoid recursion
this._xrefStms.add(position - stream.start); // Avoid recursion
}
position += contentLength;
@ -700,14 +700,11 @@ class XRef {
// Recursively get other XRefs 'XRefStm', if any
obj = dict.get("XRefStm");
if (Number.isInteger(obj)) {
const pos = obj;
if (Number.isInteger(obj) && !this._xrefStms.has(obj)) {
// ignore previously loaded xref streams
// (possible infinite recursion)
if (!(pos in this.xrefstms)) {
this.xrefstms[pos] = 1;
this.startXRefQueue.push(pos);
}
this._xrefStms.add(obj);
this.startXRefQueue.push(obj);
}
} else if (Number.isInteger(obj)) {
// Parse in-stream XRef
@ -757,8 +754,7 @@ class XRef {
}
get lastXRefStreamPos() {
const pos = Object.keys(this.xrefstms);
return pos.length === 0 ? null : Math.max(...pos);
return this._xrefStms.size > 0 ? Math.max(...this._xrefStms) : null;
}
getEntry(i) {