Make sure that an A entry in an annotation dictionary is also a dictionary itself #5684
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| @@ -485,7 +485,7 @@ var LinkAnnotation = (function LinkAnnotationClosure() { | |||
| data.annotationType = AnnotationType.LINK; | |||
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| var action = dict.get('A'); | |||
| if (action) { | |||
| if (isDict(action)) { | |||
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How about if (action && isDict(action)) { instead, to avoid doing the isDict check if action isn't defined?
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thats the first check in isDict. so what you actually only avoid is the method call to that util function. there are many more instances were we prefer the util method cal over the trivial implementation inside.
like
function isArray(v) {
return v instanceof Array;
}
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I agree that it would be better to avoid the function call here if possible. The commit has been updated.
timvandermeij
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Make sure that an A entry in an annotation dictionary is also a dictionary itself
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Seems fine, thanks! |
Make sure that an A entry in an annotation dictionary is also a dictionary itself
Fixes #5683.
According to https://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/pdf_reference_1-7.pdf#page=647&zoom=auto,-246,56 an
Aentry in an annotation dictionary must also be a dictionary itself. The current code just assumes that, but some (corrupted) PDFs violate that standard. This patch makes sure to check that theAentry is actually a dictionary before trying to get properties from it (on https://github.com/mozilla/pdf.js/blob/master/src/core/annotation.js#L489 which assumes we are dealing with a valid dictionary).