Sakurai/pdf.js
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fetch/getEntry returns null if the entry is free

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notmasteryet 2012-01-08 14:03:00 -06:00
parent 5b3f5a30ab
commit d3b3842946
1 changed files with 12 additions and 10 deletions
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22
src/obj.js
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@ -120,11 +120,11 @@ var Catalog = (function CatalogClosure() {
return shadow(this, 'toplevelPagesDict', xrefObj);
},
get documentOutline() {
var obj = this.catDict.get('Outlines');
var xref = this.xref;
var obj = xref.fetchIfRef(this.catDict.get('Outlines'));
var root = { items: [] };
if (isRef(obj)) {
obj = xref.fetch(obj).get('First');
if (isDict(obj)) {
obj = obj.get('First');
var processed = new RefSet();
if (isRef(obj)) {
var queue = [{obj: obj, parent: root}];
@ -552,9 +552,7 @@ var XRef = (function XRefClosure() {
},
getEntry: function xRefGetEntry(i) {
var e = this.entries[i];
if (e.free)
error('reading an XRef stream not implemented yet');
return e;
return e.free ? null : e; // returns null is the entry is free
},
fetchIfRef: function xRefFetchIfRef(obj) {
if (!isRef(obj))
@ -563,11 +561,15 @@ var XRef = (function XRefClosure() {
},
fetch: function xRefFetch(ref, suppressEncryption) {
var num = ref.num;
var e = this.cache[num];
if (e)
return e;
if (num in this.cache)
return this.cache[num];
var e = this.getEntry(num);
// the referenced entry can be free
if (e === null)
return (this.cache[num] = e);
e = this.getEntry(num);
var gen = ref.gen;
var stream, parser;
if (e.uncompressed) {