diff options
Diffstat (limited to 'xfa/fxfa/parser/cxfa_xml_parser.cpp')
| -rw-r--r-- | xfa/fxfa/parser/cxfa_xml_parser.cpp | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/xfa/fxfa/parser/cxfa_xml_parser.cpp b/xfa/fxfa/parser/cxfa_xml_parser.cpp new file mode 100644 index 0000000000..268c8b1416 --- /dev/null +++ b/xfa/fxfa/parser/cxfa_xml_parser.cpp @@ -0,0 +1,176 @@ +// 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(); +} |