1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef XFA_FDE_XML_CFX_SAXREADER_H_ 8 #define XFA_FDE_XML_CFX_SAXREADER_H_ 9 10 #include <memory> 11 #include <stack> 12 13 #include "core/fxcrt/fx_basic.h" 14 15 class CXFA_SAXContext; 16 17 class CFX_SAXItem { 18 public: 19 enum class Type { 20 Unknown = 0, 21 Instruction, 22 Declaration, 23 Comment, 24 Tag, 25 Text, 26 CharData, 27 }; 28 29 explicit CFX_SAXItem(uint32_t id) 30 : m_pNode(nullptr), m_eNode(Type::Unknown), m_dwID(id), m_bSkip(false) {} 31 32 CXFA_SAXContext* m_pNode; 33 Type m_eNode; 34 const uint32_t m_dwID; 35 bool m_bSkip; 36 }; 37 38 class CFX_SAXFile { 39 public: 40 CFX_SAXFile(); 41 ~CFX_SAXFile(); 42 43 bool StartFile(const CFX_RetainPtr<IFX_SeekableReadStream>& pFile, 44 uint32_t dwStart, 45 uint32_t dwLen); 46 bool ReadNextBlock(); 47 void Reset(); 48 49 CFX_RetainPtr<IFX_SeekableReadStream> m_pFile; 50 uint32_t m_dwStart; 51 uint32_t m_dwEnd; 52 uint32_t m_dwCur; 53 uint8_t* m_pBuf; 54 uint32_t m_dwBufSize; 55 uint32_t m_dwBufIndex; 56 }; 57 58 class CFX_SAXCommentContext; 59 enum class CFX_SaxMode; 60 61 enum CFX_SaxParseMode { 62 CFX_SaxParseMode_NotConvert_amp = 1 << 0, 63 CFX_SaxParseMode_NotConvert_lt = 1 << 1, 64 CFX_SaxParseMode_NotConvert_gt = 1 << 2, 65 CFX_SaxParseMode_NotConvert_apos = 1 << 3, 66 CFX_SaxParseMode_NotConvert_quot = 1 << 4, 67 CFX_SaxParseMode_NotConvert_sharp = 1 << 5, 68 CFX_SaxParseMode_NotSkipSpace = 1 << 6 69 }; 70 71 class CXFA_SAXReaderHandler; 72 73 class CFX_SAXReader { 74 public: 75 CFX_SAXReader(); 76 ~CFX_SAXReader(); 77 78 int32_t StartParse(const CFX_RetainPtr<IFX_SeekableReadStream>& pFile, 79 uint32_t dwStart = 0, 80 uint32_t dwLen = -1, 81 uint32_t dwParseMode = 0); 82 int32_t ContinueParse(IFX_Pause* pPause = nullptr); 83 void SkipCurrentNode(); 84 void SetHandler(CXFA_SAXReaderHandler* pHandler); 85 void AppendData(uint8_t ch); 86 void AppendName(uint8_t ch); 87 void ParseText(); 88 void ParseNodeStart(); 89 void ParseInstruction(); 90 void ParseDeclOrComment(); 91 void ParseDeclNode(); 92 void ParseComment(); 93 void ParseCommentContent(); 94 void ParseTagName(); 95 void ParseTagAttributeName(); 96 void ParseTagAttributeEqual(); 97 void ParseTagAttributeValue(); 98 void ParseMaybeClose(); 99 void ParseTagClose(); 100 void ParseTagEnd(); 101 void ParseTargetData(); 102 103 private: 104 void Reset(); 105 void Push(); 106 void Pop(); 107 CFX_SAXItem* GetCurrentItem() const; 108 bool SkipSpace(uint8_t ch); 109 void SkipNode(); 110 void NotifyData(); 111 void NotifyEnter(); 112 void NotifyAttribute(); 113 void NotifyBreak(); 114 void NotifyClose(); 115 void NotifyEnd(); 116 void NotifyTargetData(); 117 void ReallocDataBuffer(); 118 void ReallocNameBuffer(); 119 void ParseChar(uint8_t ch); 120 121 CFX_SAXFile m_File; 122 CXFA_SAXReaderHandler* m_pHandler; 123 int32_t m_iState; 124 std::stack<std::unique_ptr<CFX_SAXItem>> m_Stack; 125 uint32_t m_dwItemID; 126 CFX_SaxMode m_eMode; 127 CFX_SaxMode m_ePrevMode; 128 bool m_bCharData; 129 uint8_t m_CurByte; 130 uint32_t m_dwDataOffset; 131 CFX_ArrayTemplate<uint8_t> m_SkipStack; 132 uint8_t m_SkipChar; 133 uint32_t m_dwNodePos; 134 uint8_t* m_pszData; 135 int32_t m_iDataSize; 136 int32_t m_iDataLength; 137 int32_t m_iEntityStart; 138 int32_t m_iDataPos; 139 uint8_t* m_pszName; 140 int32_t m_iNameSize; 141 int32_t m_iNameLength; 142 uint32_t m_dwParseMode; 143 CFX_SAXCommentContext* m_pCommentContext; 144 }; 145 146 #endif // XFA_FDE_XML_CFX_SAXREADER_H_ 147
