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/*
** Copyright (C) 1999, 2000, 2001 Lorenzo Bettini
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
*/
// textgen.h : Text Generator class &&
#ifndef _TEXTGEN_H
#define _TEXTGEN_H
#include <iostream.h>
#include "genfun.h"
class TextGenerator {
public :
virtual void generate( const char *s ) const { (*sout) << s ; }
virtual void generate( const char *s, int start, int end ) const
{
for ( int i = start ; i <= end ; ++i )
(*sout) << s[i] ;
}
virtual void generateln( const char *s ) const
{
generate( s ) ;
(*sout) << endl ;
}
virtual void generateEntire( const char *s ) const
{
startTextGeneration() ;
generate(s) ;
endTextGeneration() ;
}
virtual void startTextGeneration() const {}
virtual void endTextGeneration() const {}
virtual void beginText( const char *s ) const
{
startTextGeneration() ;
if ( s )
generate( s ) ;
}
virtual void endText( const char *s ) const
{
if ( s )
generate( s ) ;
endTextGeneration() ;
}
} ;
// Decorator
class TextDecorator : public TextGenerator {
protected :
TextGenerator *decorated ;
public :
TextDecorator( TextGenerator *t ) : decorated( t ) {}
virtual void startTextGeneration() const
{
startDecorate() ;
if ( decorated )
decorated->startTextGeneration() ;
}
virtual void endTextGeneration() const
{
if ( decorated )
decorated->endTextGeneration() ;
endDecorate() ;
}
// pure virtual functions
virtual void startDecorate() const = 0 ;
virtual void endDecorate() const = 0 ;
} ;
#endif
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