1 /************************************************************************* 2 * 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * Copyright 2000, 2010 Oracle and/or its affiliates. 6 * 7 * OpenOffice.org - a multi-platform office productivity suite 8 * 9 * This file is part of OpenOffice.org. 10 * 11 * OpenOffice.org is free software: you can redistribute it and/or modify 12 * it under the terms of the GNU Lesser General Public License version 3 13 * only, as published by the Free Software Foundation. 14 * 15 * OpenOffice.org is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU Lesser General Public License version 3 for more details 19 * (a copy is included in the LICENSE file that accompanied this code). 20 * 21 * You should have received a copy of the GNU Lesser General Public License 22 * version 3 along with OpenOffice.org. If not, see 23 * <http://www.openoffice.org/license.html> 24 * for a copy of the LGPLv3 License. 25 * 26 ************************************************************************/ 27 28 #ifndef ADC_TKP_HXX 29 #define ADC_TKP_HXX 30 31 // USED SERVICES 32 // BASE CLASSES 33 // COMPONENTS 34 class CharacterSource; 35 class TkpContext; 36 // PARAMETRS 37 38 39 40 /** This is the interface for parser classes, which get a sequence of tokens from 41 a text. 42 43 Start() starts to parse the text from the given i_rSource. 44 GetNextToken() returns a Token on the heap as long as there are 45 still characters in the text left. This can be checked by 46 HasMore(). 47 48 The algorithms for parsing tokens from the text are an issue of 49 the derived classes. 50 */ 51 #if 0 52 /** 53 Parsing can be interrupted for a different source by PushSource(). 54 The parsing before interruption is continued after PopSource(). 55 */ 56 #endif // 0 57 58 class TokenParser 59 { 60 public: 61 // LIFECYCLE 62 TokenParser(); 63 virtual ~TokenParser() {} 64 65 // OPERATIONS 66 /** Start parsing a character source. Any previously parsed sources 67 are discarded. 68 */ 69 virtual void Start( 70 CharacterSource & 71 i_rSource ); 72 73 /** @short Gets the next identifiable token out of the 74 source code. 75 */ 76 void GetNextToken(); 77 78 /// @return true, if there are more tokens to parse. 79 bool HasMore() const { return bHasMore; } 80 81 private: 82 void InitSource( 83 CharacterSource & 84 i_rSource ); 85 86 virtual void SetStartContext() = 0; 87 virtual void SetCurrentContext( 88 TkpContext & io_rContext ) = 0; 89 virtual TkpContext & 90 CurrentContext() = 0; 91 // DATA 92 CharacterSource * pChars; 93 bool bHasMore; 94 }; 95 96 97 #endif 98 99 100