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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
#ifndef CORE_FXCRT_XML_CFX_XMLPARSER_H_
#define CORE_FXCRT_XML_CFX_XMLPARSER_H_
#include <memory>
#include <stack>
#include <vector>
#include "core/fxcrt/cfx_blockbuffer.h"
#include "core/fxcrt/cfx_seekablestreamproxy.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/retain_ptr.h"
#include "core/fxcrt/xml/cfx_xmlnode.h"
class CFX_XMLElement;
class CFX_XMLNode;
class IFX_SeekableStream;
enum class FX_XmlSyntaxResult {
None,
InstructionOpen,
InstructionClose,
ElementOpen,
ElementBreak,
ElementClose,
TargetName,
TagName,
AttriName,
AttriValue,
Text,
CData,
TargetData,
Error,
EndOfString
};
class CFX_XMLParser {
public:
static bool IsXMLNameChar(wchar_t ch, bool bFirstChar);
CFX_XMLParser(CFX_XMLNode* pParent,
const RetainPtr<IFX_SeekableStream>& pStream);
virtual ~CFX_XMLParser();
bool Parse();
protected:
FX_XmlSyntaxResult DoSyntaxParse();
WideString GetTagName() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
WideString GetAttributeName() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
WideString GetAttributeValue() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
WideString GetTextData() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
private:
enum class FDE_XmlSyntaxState {
Text,
Node,
Target,
Tag,
AttriName,
AttriEqualSign,
AttriQuotation,
AttriValue,
Entity,
EntityDecimal,
EntityHex,
CloseInstruction,
BreakElement,
CloseElement,
SkipDeclNode,
DeclCharData,
SkipComment,
SkipCommentOrDecl,
SkipCData,
TargetData
};
void ParseTextChar(wchar_t ch);
bool GetStatus() const;
FX_FILESIZE GetCurrentPos() const { return m_ParsedChars + m_Start; }
FX_FILESIZE GetCurrentBinaryPos() const;
int32_t GetCurrentNodeNumber() const { return m_iCurrentNodeNum; }
int32_t GetLastNodeNumber() const { return m_iLastNodeNum; }
WideString GetTargetName() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
WideString GetTargetData() const {
return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
}
CFX_XMLNode* m_pParent;
CFX_XMLNode* m_pChild;
std::stack<CFX_XMLNode*> m_NodeStack;
WideString m_ws1;
RetainPtr<CFX_SeekableStreamProxy> m_pStream;
size_t m_iXMLPlaneSize;
FX_FILESIZE m_iCurrentPos;
int32_t m_iCurrentNodeNum;
int32_t m_iLastNodeNum;
int32_t m_iParsedBytes;
FX_FILESIZE m_ParsedChars;
std::vector<wchar_t> m_Buffer;
size_t m_iBufferChars;
bool m_bEOS;
FX_FILESIZE m_Start; // Start position in m_Buffer
FX_FILESIZE m_End; // End position in m_Buffer
FX_XMLNODE m_CurNode;
std::stack<FX_XMLNODE> m_XMLNodeStack;
CFX_BlockBuffer m_BlockBuffer;
int32_t m_iAllocStep;
wchar_t* m_pCurrentBlock; // Pointer into CFX_BlockBuffer
int32_t m_iIndexInBlock;
int32_t m_iTextDataLength;
FX_XmlSyntaxResult m_syntaxParserResult;
FDE_XmlSyntaxState m_syntaxParserState;
wchar_t m_wQuotationMark;
int32_t m_iEntityStart;
std::stack<wchar_t> m_SkipStack;
wchar_t m_SkipChar;
};
#endif // CORE_FXCRT_XML_CFX_XMLPARSER_H_
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