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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/fxcrt/xml/cfx_xmlparser.h"
#include "core/fxcrt/xml/cfx_xmlchardata.h"
#include "core/fxcrt/xml/cfx_xmlelement.h"
#include "core/fxcrt/xml/cfx_xmlinstruction.h"
#include "core/fxcrt/xml/cfx_xmlnode.h"
#include "core/fxcrt/xml/cfx_xmltext.h"
#include "third_party/base/ptr_util.h"
CFX_XMLParser::CFX_XMLParser(CFX_XMLNode* pParent,
const RetainPtr<CFX_SeekableStreamProxy>& pStream)
: m_pParser(pdfium::MakeUnique<CFX_XMLSyntaxParser>(pStream)),
m_pParent(pParent),
m_pChild(nullptr) {
ASSERT(m_pParent && pStream);
m_NodeStack.push(m_pParent);
}
CFX_XMLParser::~CFX_XMLParser() {}
int32_t CFX_XMLParser::Parse() {
int32_t iCount = 0;
while (true) {
FX_XmlSyntaxResult result = m_pParser->DoSyntaxParse();
if (result == FX_XmlSyntaxResult::Error)
return -1;
if (result == FX_XmlSyntaxResult::EndOfString)
break;
switch (result) {
case FX_XmlSyntaxResult::InstructionClose:
if (m_pChild && m_pChild->GetType() != FX_XMLNODE_Instruction)
return -1;
m_pChild = m_pParent;
break;
case FX_XmlSyntaxResult::ElementClose:
if (m_pChild->GetType() != FX_XMLNODE_Element)
return -1;
m_ws1 = m_pParser->GetTagName();
if (m_ws1.GetLength() > 0 &&
m_ws1 != static_cast<CFX_XMLElement*>(m_pChild)->GetName()) {
return -1;
}
if (!m_NodeStack.empty())
m_NodeStack.pop();
if (m_NodeStack.empty())
return -1;
m_pParent = m_NodeStack.top();
m_pChild = m_pParent;
iCount++;
break;
case FX_XmlSyntaxResult::TargetName:
m_ws1 = m_pParser->GetTargetName();
if (m_ws1 == L"originalXFAVersion" || m_ws1 == L"acrobat") {
m_pChild = new CFX_XMLInstruction(m_ws1);
m_pParent->AppendChild(m_pChild);
} else {
m_pChild = nullptr;
}
m_ws1.clear();
break;
case FX_XmlSyntaxResult::TagName:
m_ws1 = m_pParser->GetTagName();
m_pChild = new CFX_XMLElement(m_ws1);
m_pParent->AppendChild(m_pChild);
m_NodeStack.push(m_pChild);
m_pParent = m_pChild;
break;
case FX_XmlSyntaxResult::AttriName:
m_ws1 = m_pParser->GetAttributeName();
break;
case FX_XmlSyntaxResult::AttriValue:
if (m_pChild && m_pChild->GetType() == FX_XMLNODE_Element) {
static_cast<CFX_XMLElement*>(m_pChild)->SetString(
m_ws1, m_pParser->GetAttributeName());
}
m_ws1.clear();
break;
case FX_XmlSyntaxResult::Text:
m_ws1 = m_pParser->GetTextData();
m_pChild = new CFX_XMLText(m_ws1);
m_pParent->AppendChild(m_pChild);
m_pChild = m_pParent;
break;
case FX_XmlSyntaxResult::CData:
m_ws1 = m_pParser->GetTextData();
m_pChild = new CFX_XMLCharData(m_ws1);
m_pParent->AppendChild(m_pChild);
m_pChild = m_pParent;
break;
case FX_XmlSyntaxResult::TargetData:
if (m_pChild) {
if (m_pChild->GetType() != FX_XMLNODE_Instruction)
return -1;
auto* instruction = static_cast<CFX_XMLInstruction*>(m_pChild);
if (!m_ws1.IsEmpty())
instruction->AppendData(m_ws1);
instruction->AppendData(m_pParser->GetTargetData());
}
m_ws1.clear();
break;
case FX_XmlSyntaxResult::ElementOpen:
case FX_XmlSyntaxResult::ElementBreak:
case FX_XmlSyntaxResult::InstructionOpen:
default:
break;
}
}
return m_NodeStack.size() != 1 ? -1 : m_pParser->GetStatus();
}
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