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Add a recoveryMode that suppresses errors from the Parser, and utilize it when searching for the main trailer in XRef_indexObjects (bug 1250079)

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Instead of having `Parser_getObj` fail unconditionally for the referenced PDF file, this patch attempts to let searching for the main trailer continue even if there are errors.

Fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1250079.
This commit is contained in:
Jonas Jenwald 2016-02-24 17:56:28 +01:00
parent 94089960c0
commit 544d29f5cb
5 changed files with 22 additions and 5 deletions
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6
src/core/obj.js
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@ -970,13 +970,15 @@ var XRef = (function XRefClosure() {
var dict;
for (i = 0, ii = trailers.length; i < ii; ++i) {
stream.pos = trailers[i];
var parser = new Parser(new Lexer(stream), true, this);
var parser = new Parser(new Lexer(stream), /* allowStreams = */ true,
/* xref = */ this, /* recoveryMode = */ true);
var obj = parser.getObj();
if (!isCmd(obj, 'trailer')) {
continue;
}
// read the trailer dictionary
if (!isDict(dict = parser.getObj())) {
dict = parser.getObj();
if (!isDict(dict)) {
continue;
}
// taking the first one with 'ID'