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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 "xfa/fxfa/parser/cxfa_xml_parser.h"
CXFA_XMLParser::CXFA_XMLParser(CFDE_XMLNode* pRoot,
const CFX_RetainPtr<IFGAS_Stream>& pStream)
: m_nElementStart(0),
m_dwCheckStatus(0),
m_dwCurrentCheckStatus(0),
m_pRoot(pRoot),
m_pStream(pStream),
m_pParser(new CFDE_XMLSyntaxParser),
m_pParent(pRoot),
m_pChild(nullptr),
m_NodeStack(16),
m_syntaxParserResult(FDE_XmlSyntaxResult::None) {
ASSERT(m_pParent && m_pStream);
m_NodeStack.Push(m_pParent);
m_pParser->Init(m_pStream, 32 * 1024, 1024 * 1024);
}
CXFA_XMLParser::~CXFA_XMLParser() {
m_NodeStack.RemoveAll(false);
m_ws1.clear();
m_ws2.clear();
}
int32_t CXFA_XMLParser::DoParser(IFX_Pause* pPause) {
if (m_syntaxParserResult == FDE_XmlSyntaxResult::Error)
return -1;
if (m_syntaxParserResult == FDE_XmlSyntaxResult::EndOfString)
return 100;
int32_t iCount = 0;
while (true) {
m_syntaxParserResult = m_pParser->DoSyntaxParse();
switch (m_syntaxParserResult) {
case FDE_XmlSyntaxResult::InstructionOpen:
break;
case FDE_XmlSyntaxResult::InstructionClose:
if (m_pChild) {
if (m_pChild->GetType() != FDE_XMLNODE_Instruction) {
m_syntaxParserResult = FDE_XmlSyntaxResult::Error;
break;
}
}
m_pChild = m_pParent;
break;
case FDE_XmlSyntaxResult::ElementOpen:
if (m_dwCheckStatus != 0x03 && m_NodeStack.GetSize() == 2) {
m_nElementStart = m_pParser->GetCurrentPos() - 1;
}
break;
case FDE_XmlSyntaxResult::ElementBreak:
break;
case FDE_XmlSyntaxResult::ElementClose:
if (m_pChild->GetType() != FDE_XMLNODE_Element) {
m_syntaxParserResult = FDE_XmlSyntaxResult::Error;
break;
}
m_pParser->GetTagName(m_ws1);
static_cast<CFDE_XMLElement*>(m_pChild)->GetTagName(m_ws2);
if (m_ws1.GetLength() > 0 && m_ws1 != m_ws2) {
m_syntaxParserResult = FDE_XmlSyntaxResult::Error;
break;
}
m_NodeStack.Pop();
if (m_NodeStack.GetSize() < 1) {
m_syntaxParserResult = FDE_XmlSyntaxResult::Error;
break;
} else if (m_dwCurrentCheckStatus != 0 && m_NodeStack.GetSize() == 2) {
m_nSize[m_dwCurrentCheckStatus - 1] =
m_pParser->GetCurrentBinaryPos() -
m_nStart[m_dwCurrentCheckStatus - 1];
m_dwCurrentCheckStatus = 0;
}
m_pParent = static_cast<CFDE_XMLNode*>(*m_NodeStack.GetTopElement());
m_pChild = m_pParent;
iCount++;
break;
case FDE_XmlSyntaxResult::TargetName:
m_pParser->GetTargetName(m_ws1);
if (m_ws1 == FX_WSTRC(L"originalXFAVersion") ||
m_ws1 == FX_WSTRC(L"acrobat")) {
m_pChild = new CFDE_XMLInstruction(m_ws1);
m_pParent->InsertChildNode(m_pChild);
} else {
m_pChild = nullptr;
}
m_ws1.clear();
break;
case FDE_XmlSyntaxResult::TagName:
m_pParser->GetTagName(m_ws1);
m_pChild = new CFDE_XMLElement(m_ws1);
m_pParent->InsertChildNode(m_pChild);
m_NodeStack.Push(m_pChild);
m_pParent = m_pChild;
if (m_dwCheckStatus != 0x03 && m_NodeStack.GetSize() == 3) {
CFX_WideString wsTag;
static_cast<CFDE_XMLElement*>(m_pChild)->GetLocalTagName(wsTag);
if (wsTag == FX_WSTRC(L"template")) {
m_dwCheckStatus |= 0x01;
m_dwCurrentCheckStatus = 0x01;
m_nStart[0] = m_pParser->GetCurrentBinaryPos() -
(m_pParser->GetCurrentPos() - m_nElementStart);
} else if (wsTag == FX_WSTRC(L"datasets")) {
m_dwCheckStatus |= 0x02;
m_dwCurrentCheckStatus = 0x02;
m_nStart[1] = m_pParser->GetCurrentBinaryPos() -
(m_pParser->GetCurrentPos() - m_nElementStart);
}
}
break;
case FDE_XmlSyntaxResult::AttriName:
m_pParser->GetAttributeName(m_ws1);
break;
case FDE_XmlSyntaxResult::AttriValue:
if (m_pChild) {
m_pParser->GetAttributeName(m_ws2);
if (m_pChild->GetType() == FDE_XMLNODE_Element) {
static_cast<CFDE_XMLElement*>(m_pChild)->SetString(m_ws1, m_ws2);
}
}
m_ws1.clear();
break;
case FDE_XmlSyntaxResult::Text:
m_pParser->GetTextData(m_ws1);
m_pChild = new CFDE_XMLText(m_ws1);
m_pParent->InsertChildNode(m_pChild);
m_pChild = m_pParent;
break;
case FDE_XmlSyntaxResult::CData:
m_pParser->GetTextData(m_ws1);
m_pChild = new CFDE_XMLCharData(m_ws1);
m_pParent->InsertChildNode(m_pChild);
m_pChild = m_pParent;
break;
case FDE_XmlSyntaxResult::TargetData:
if (m_pChild) {
if (m_pChild->GetType() != FDE_XMLNODE_Instruction) {
m_syntaxParserResult = FDE_XmlSyntaxResult::Error;
break;
}
if (!m_ws1.IsEmpty()) {
static_cast<CFDE_XMLInstruction*>(m_pChild)->AppendData(m_ws1);
}
m_pParser->GetTargetData(m_ws1);
static_cast<CFDE_XMLInstruction*>(m_pChild)->AppendData(m_ws1);
}
m_ws1.clear();
break;
default:
break;
}
if (m_syntaxParserResult == FDE_XmlSyntaxResult::Error ||
m_syntaxParserResult == FDE_XmlSyntaxResult::EndOfString) {
break;
}
if (pPause && iCount > 500 && pPause->NeedToPauseNow()) {
break;
}
}
return (m_syntaxParserResult == FDE_XmlSyntaxResult::Error ||
m_NodeStack.GetSize() != 1)
? -1
: m_pParser->GetStatus();
}
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