83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
// Copyright 2016 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fpdfdoc/cpdf_metadata.h"
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#include <memory>
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#include "core/fpdfapi/parser/cpdf_stream.h"
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#include "core/fpdfapi/parser/cpdf_stream_acc.h"
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#include "core/fxcrt/cfx_readonlymemorystream.h"
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#include "core/fxcrt/fx_codepage.h"
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#include "core/fxcrt/xml/cfx_xmldocument.h"
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#include "core/fxcrt/xml/cfx_xmlelement.h"
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#include "core/fxcrt/xml/cfx_xmlparser.h"
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namespace {
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void CheckForSharedFormInternal(CFX_XMLElement* element,
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std::vector<UnsupportedFeature>* unsupported) {
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WideString attr =
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element->GetAttribute(WideString::FromASCII("xmlns:adhocwf"));
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if (attr.EqualsASCII("http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/")) {
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for (const auto* child = element->GetFirstChild(); child;
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child = child->GetNextSibling()) {
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if (child->GetType() != CFX_XMLNode::Type::kElement)
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continue;
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const auto* child_elem = static_cast<const CFX_XMLElement*>(child);
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if (!child_elem->GetName().EqualsASCII("adhocwf:workflowType"))
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continue;
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switch (child_elem->GetTextData().GetInteger()) {
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case 0:
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unsupported->push_back(UnsupportedFeature::kDocumentSharedFormEmail);
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break;
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case 1:
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unsupported->push_back(
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UnsupportedFeature::kDocumentSharedFormAcrobat);
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break;
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case 2:
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unsupported->push_back(
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UnsupportedFeature::kDocumentSharedFormFilesystem);
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break;
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}
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// We only care about the first one we find.
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break;
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}
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}
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for (auto* child = element->GetFirstChild(); child;
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child = child->GetNextSibling()) {
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CFX_XMLElement* pElement = ToXMLElement(child);
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if (pElement)
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CheckForSharedFormInternal(pElement, unsupported);
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}
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}
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} // namespace
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CPDF_Metadata::CPDF_Metadata(const CPDF_Stream* pStream) : stream_(pStream) {
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ASSERT(pStream);
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}
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CPDF_Metadata::~CPDF_Metadata() = default;
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std::vector<UnsupportedFeature> CPDF_Metadata::CheckForSharedForm() const {
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auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(stream_.Get());
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pAcc->LoadAllDataFiltered();
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auto stream = pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(pAcc->GetSpan());
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CFX_XMLParser parser(stream);
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std::unique_ptr<CFX_XMLDocument> doc = parser.Parse();
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if (!doc)
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return {};
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std::vector<UnsupportedFeature> unsupported;
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CheckForSharedFormInternal(doc->GetRoot(), &unsupported);
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return unsupported;
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}
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