| // 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; |
| } |