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Use stringToPDFString to sanitizing bad "Prefix" entries in Page Label dictionaries

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It seems that certain bad PDF generators can create badly encoded "Prefix" entries for Page Labels, one example being http://ukjewishfilm.org/wp-content/uploads/2015/09/Jewish-Film-Festival-Programme-ONLINE.pdf.

Unfortunately I didn't come across such a PDF file while adding the API support for Page Labels, but with them now being used in the viewer I just found this issue. With this patch, we now display the Page Labels in the same way as Adobe Reader.
This commit is contained in:
Jonas Jenwald 2016-11-03 19:48:08 +01:00
parent 9f8d67475e
commit 2d8d8b5e53
4 changed files with 15 additions and 3 deletions
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5
src/core/obj.js
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@ -302,8 +302,9 @@ var Catalog = (function CatalogClosure() {
assert(!s || isName(s), 'Invalid style in PageLabel dictionary.');
style = (s ? s.name : null);
prefix = labelDict.get('P') || '';
assert(isString(prefix), 'Invalid prefix in PageLabel dictionary.');
var p = labelDict.get('P') || '';
assert(isString(p), 'Invalid prefix in PageLabel dictionary.');
prefix = stringToPDFString(p);
start = labelDict.get('St') || 1;
assert(isInt(start), 'Invalid start in PageLabel dictionary.');