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LibPDF: Extract a Document::read_filters() method

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No behavior change.
This commit is contained in:
Nico Weber 2023-07-23 22:45:39 -04:00 • committed by Tim Flynn
parent 9f4feb7315
commit 532230c0e4
3 changed files with 20 additions and 11 deletions
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17
Userland/Libraries/LibPDF/Document.cpp
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@ -297,6 +297,23 @@ PDFErrorOr<Optional<InfoDict>> Document::info_dict()
return InfoDict(this, TRY(trailer()->get_dict(this, CommonNames::Info)));
}
PDFErrorOr<Vector<DeprecatedFlyString>> Document::read_filters(NonnullRefPtr<DictObject> dict)
{
Vector<DeprecatedFlyString> filters;
// We may either get a single filter or an array of cascading filters
auto filter_object = TRY(dict->get_object(this, CommonNames::Filter));
if (filter_object->is<ArrayObject>()) {
auto filter_array = filter_object->cast<ArrayObject>();
for (size_t i = 0; i < filter_array->size(); ++i)
filters.append(TRY(filter_array->get_name_at(this, i))->name());
} else {
filters.append(filter_object->cast<NameObject>()->name());
}
return filters;
}
PDFErrorOr<void> Document::build_page_tree()
{
auto page_tree = TRY(m_catalog->get_dict(this, CommonNames::Pages));