blob: 3735247781c9bbfae4927240a674b23b678b0f36 [file] [log] [blame]
// 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 <memory>
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fxcrt/cfx_readonlymemorystream.h"
#include "core/fxcrt/fx_codepage.h"
#include "core/fxcrt/xml/cfx_xmldocument.h"
#include "core/fxcrt/xml/cfx_xmlelement.h"
#include "core/fxcrt/xml/cfx_xmlparser.h"
#include "third_party/base/check.h"
namespace {
void CheckForSharedFormInternal(CFX_XMLElement* element,
std::vector<UnsupportedFeature>* unsupported) {
WideString attr =
element->GetAttribute(WideString::FromASCII("xmlns:adhocwf"));
if (attr.EqualsASCII("http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/")) {
for (const auto* child = element->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->GetType() != CFX_XMLNode::Type::kElement)
continue;
const auto* child_elem = static_cast<const CFX_XMLElement*>(child);
if (!child_elem->GetName().EqualsASCII("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()) {
CFX_XMLElement* pElement = ToXMLElement(child);
if (pElement)
CheckForSharedFormInternal(pElement, unsupported);
}
}
} // namespace
CPDF_Metadata::CPDF_Metadata(const CPDF_Stream* pStream) : stream_(pStream) {
DCHECK(pStream);
}
CPDF_Metadata::~CPDF_Metadata() = default;
std::vector<UnsupportedFeature> CPDF_Metadata::CheckForSharedForm() const {
auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(stream_.Get());
pAcc->LoadAllDataFiltered();
auto stream = pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(pAcc->GetSpan());
CFX_XMLParser parser(stream);
std::unique_ptr<CFX_XMLDocument> doc = parser.Parse();
if (!doc)
return {};
std::vector<UnsupportedFeature> unsupported;
CheckForSharedFormInternal(doc->GetRoot(), &unsupported);
return unsupported;
}