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       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #ifndef ADC_TKP_HXX
      21             : #define ADC_TKP_HXX
      22             : 
      23             : // USED SERVICES
      24             :     // BASE CLASSES
      25             :     // COMPONENTS
      26             : class CharacterSource;
      27             : class TkpContext;
      28             :     // PARAMETRS
      29             : 
      30             : 
      31             : 
      32             : /** This is the interface for parser classes, which get a sequence of tokens from
      33             :     a text.
      34             : 
      35             :     Start() starts to parse the text from the given i_rSource.
      36             : 
      37             :     The algorithms for parsing tokens from the text are an issue of
      38             :     the derived classes.
      39             : */
      40             : 
      41             : class TokenParser
      42             : {
      43             :   public:
      44             :     // LIFECYCLE
      45             :                         TokenParser();
      46           0 :     virtual             ~TokenParser() {}
      47             : 
      48             :     // OPERATIONS
      49             :     /** Start parsing a character source. Any previously parsed sources
      50             :         are discarded.
      51             :     */
      52             :     virtual void        Start(
      53             :                             CharacterSource &
      54             :                                             i_rSource );
      55             : 
      56             :     /// @return true, if there are more tokens to parse.
      57             :     bool                HasMore() const         { return bHasMore; }
      58             : 
      59             :   private:
      60             :     void                InitSource(
      61             :                             CharacterSource &
      62             :                                             i_rSource );
      63             : 
      64             :     virtual void        SetStartContext() = 0;
      65             :     virtual void        SetCurrentContext(
      66             :                             TkpContext &        io_rContext ) = 0;
      67             :     virtual TkpContext &
      68             :                         CurrentContext() = 0;
      69             :     // DATA
      70             :     CharacterSource *   pChars;
      71             :     bool                bHasMore;
      72             : };
      73             : 
      74             : 
      75             : #endif
      76             : 
      77             : 
      78             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */