I found a seeming bug in PdfNamesTree::HasValue whilst trying to debug this
issue. As Leonard helpfully pointed out, I should drop the / from in front of
the name. I put it there in confusion because HasValue returned false if I
queried for the key name without the slash. Well, as it turns out, the
definition of PdfNamesTree::HasValue is as follows:
bool PdfNamesTree::HasValue( const PdfName & tree, const PdfString & key ) const
{
return ( this->GetValue( tree, key) == NULL );
}
Surely it should be != NULL ?
>
> I have a PdfAnnotation* stored in a variable named ann. The destination of
> this PDF annotation is a named object in the document (a page object). I've
> checked that ann->HasDestination() returns true for it. However, if I try the
> following, I get an EXC_BAD_ACCESS:
> PdfDestination destination = ann->GetDestination();
>
> Furthermore, if I try and resolve the destination of the object in the
> following way through the /Dests names tree of the document, I get a NULL
> back:
>
> PdfDictionary dict = ann->GetObject()->GetDictionary();
> PdfObject *indirKey = ann->GetObject()->GetIndirectKey("Dest");
> cerr << indirKey->GetString().GetStringUtf8(); //returns the name of the
> named object correctly
>
> PdfNamesTree *namesTree = doc->GetNamesTree();
> PdfObject *dests = namesTree->GetDestsNode();
> PdfString str = indirKey->GetString();
> PdfObject *indirObj = dests->GetIndirectKey(str.GetStringUtf8());
>
> if (namesTree->HasValue(PdfName("/Dests"),str)) {
> PdfObject *destObj = namesTree->GetValue(PdfName("/Dests"),
> indirKey->GetString());
>
> if (!destObj) {
> cerr << "Value is NULL!"; //this code is reached, and it
> shouldn't?
> }
> }
>
> Any ideas of what I am doing wrong? Does this have something to do with lazy
> loading and accessing an indirect key perhaps?
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