1 // Copyright 2017 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 CORE_FXCRT_CSS_CFX_CSSSYNTAXPARSER_H_ 8 #define CORE_FXCRT_CSS_CFX_CSSSYNTAXPARSER_H_ 9 10 #include <stack> 11 12 #include "core/fxcrt/css/cfx_cssexttextbuf.h" 13 #include "core/fxcrt/css/cfx_csstextbuf.h" 14 #include "core/fxcrt/fx_string.h" 15 16 #define CFX_CSSSYNTAXCHECK_AllowCharset 1 17 #define CFX_CSSSYNTAXCHECK_AllowImport 2 18 19 enum class CFX_CSSSyntaxMode { 20 RuleSet, 21 Comment, 22 UnknownRule, 23 Selector, 24 PropertyName, 25 PropertyValue, 26 }; 27 28 enum class CFX_CSSSyntaxStatus : uint8_t { 29 Error, 30 EOS, 31 None, 32 StyleRule, 33 Selector, 34 DeclOpen, 35 DeclClose, 36 PropertyName, 37 PropertyValue, 38 }; 39 40 class CFX_CSSSyntaxParser { 41 public: 42 CFX_CSSSyntaxParser(const wchar_t* pBuffer, int32_t iBufferSize); 43 CFX_CSSSyntaxParser(const wchar_t* pBuffer, 44 int32_t iBufferSize, 45 int32_t iTextDatSize, 46 bool bOnlyDeclaration); 47 ~CFX_CSSSyntaxParser(); 48 49 CFX_CSSSyntaxStatus DoSyntaxParse(); 50 WideStringView GetCurrentString() const; 51 52 protected: 53 void SwitchMode(CFX_CSSSyntaxMode eMode); 54 int32_t SwitchToComment(); 55 56 bool RestoreMode(); 57 bool AppendChar(wchar_t wch); 58 int32_t SaveTextData(); 59 bool IsCharsetEnabled() const { 60 return (m_dwCheck & CFX_CSSSYNTAXCHECK_AllowCharset) != 0; 61 } 62 void DisableCharset() { m_dwCheck = CFX_CSSSYNTAXCHECK_AllowImport; } 63 bool IsImportEnabled() const; 64 void DisableImport() { m_dwCheck = 0; } 65 66 CFX_CSSTextBuf m_TextData; 67 CFX_CSSExtTextBuf m_TextPlane; 68 int32_t m_iTextDataLen; 69 uint32_t m_dwCheck; 70 CFX_CSSSyntaxMode m_eMode; 71 CFX_CSSSyntaxStatus m_eStatus; 72 std::stack<CFX_CSSSyntaxMode> m_ModeStack; 73 }; 74 75 #endif // CORE_FXCRT_CSS_CFX_CSSSYNTAXPARSER_H_ 76
