Break xfa_parser_imp apart

xfa/fxfa/parser/cxfa_xml_parser.cpp

+// 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, IFX_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();
+  m_ws1.clear();
+  m_ws2.clear();
+}
+
+void CXFA_XMLParser::Release() {
+  delete this;
+}
+
+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();
+}