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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/fx_codepage.h"
#include "core/fxcrt/xml/cfx_xmlelement.h"
#include "core/fxcrt/xml/cfx_xmlparser.h"
namespace {
void CheckForSharedFormInternal(CFX_XMLElement* element,
std::vector<UnsupportedFeature>* unsupported) {
for (const auto& pair : element->GetAttributes()) {
if (pair.first != L"xmlns:adhocwf" ||
pair.second != L"http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/") {
continue;
}
for (const auto* child = element->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->GetType() != FX_XMLNODE_Element)
continue;
const auto* child_elem = static_cast<const CFX_XMLElement*>(child);
if (child_elem->GetName() != L"adhocwf:workflowType")
continue;
switch (child_elem->GetTextData().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;
}
// We only care about the first one we find.
break;
}
}
for (auto* child = element->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->GetType() != FX_XMLNODE_Element)
continue;
CheckForSharedFormInternal(static_cast<CFX_XMLElement*>(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();
auto root = pdfium::MakeUnique<CFX_XMLElement>(L"root");
auto proxy = pdfium::MakeRetain<CFX_SeekableStreamProxy>(pAcc->GetData(),
pAcc->GetSize());
proxy->SetCodePage(FX_CODEPAGE_UTF8);
CFX_XMLParser parser(root.get(), proxy);
if (!parser.Parse())
return {};
std::vector<UnsupportedFeature> unsupported;
CheckForSharedFormInternal(root.get(), &unsupported);
return unsupported;
}
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