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// Copyright 2016 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fpdfdoc/cpdf_metadata.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fxcrt/xml/cxml_content.h"
#include "core/fxcrt/xml/cxml_element.h"
namespace {
void CheckForSharedFormInternal(CXML_Element* element,
std::vector<UnsupportedFeature>* unsupported) {
size_t count = element->CountAttrs();
for (size_t i = 0; i < count; ++i) {
ByteString space;
ByteString name;
WideString value;
element->GetAttrByIndex(i, &space, &name, &value);
if (space != "xmlns" || name != "adhocwf" ||
value != L"http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/") {
continue;
}
CXML_Element* pVersion = element->GetElement("adhocwf", "workflowType", 0);
if (!pVersion)
continue;
CXML_Content* pContent = ToContent(pVersion->GetChild(0));
if (!pContent)
continue;
switch (pContent->m_Content.GetInteger()) {
case 0:
unsupported->push_back(UnsupportedFeature::kDocumentSharedFormEmail);
break;
case 1:
unsupported->push_back(UnsupportedFeature::kDocumentSharedFormAcrobat);
break;
case 2:
unsupported->push_back(
UnsupportedFeature::kDocumentSharedFormFilesystem);
break;
}
}
count = element->CountChildren();
for (size_t i = 0; i < count; ++i) {
CXML_Element* child = ToElement(element->GetChild(i));
if (!child)
continue;
CheckForSharedFormInternal(child, unsupported);
}
}
} // namespace
CPDF_Metadata::CPDF_Metadata(const CPDF_Stream* pStream) : stream_(pStream) {
ASSERT(pStream);
}
CPDF_Metadata::~CPDF_Metadata() = default;
std::vector<UnsupportedFeature> CPDF_Metadata::CheckForSharedForm() const {
auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(stream_.Get());
pAcc->LoadAllDataFiltered();
std::unique_ptr<CXML_Element> xml_root =
CXML_Element::Parse(pAcc->GetData(), pAcc->GetSize());
if (!xml_root)
return {};
std::vector<UnsupportedFeature> unsupported;
CheckForSharedFormInternal(xml_root.get(), &unsupported);
return unsupported;
}
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