---

Position.hh

Go to the documentation of this file.

/*
    libpdf++: a C++ Free library to generate PDF file
    Copyright (C) 2002 Nestal Wan

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
#ifndef __PDF_TEXT_POSITION_HEADER_INCLUDED__
#define __PDF_TEXT_POSITION_HEADER_INCLUDED__

#include <iosfwd>

namespace pdf { namespace text {

class CPosition
{
public :
    virtual ~CPosition( ) ;
    virtual CPosition* Dup( ) const = 0 ;
    virtual std::ostream& Write( std::ostream& os, double leading ) const = 0 ;
} ;

class CNullPos : public CPosition
{
public :
    CPosition* Dup( ) const { return new CNullPos ; }
    std::ostream& Write( std::ostream& os, double ) const { return os ; }
} ;

class COffsetPos : public CPosition
{
private :

    double m_offset_x, m_offset_y ;

public :
    COffsetPos( double offset_x, double offset_y )
        : m_offset_x( offset_x ), m_offset_y( offset_y ) { }

    double X( ) const { return m_offset_x ; }
    double Y( ) const { return m_offset_y ; }
    
    std::ostream& Write( std::ostream& os, double leading ) const ;
    
    CPosition* Dup( ) const { return new COffsetPos( *this ) ; }
} ;

class CAbsolutePos : public CPosition
{
private :

    double m_pos_x, m_pos_y ;

public :
    CAbsolutePos( double pos_x, double pos_y )
        : m_pos_x( pos_x ), m_pos_y( pos_y ) { }

    double X( ) const { return m_pos_x ; }
    double Y( ) const { return m_pos_y ; }
    
    std::ostream& Write( std::ostream& os, double leading ) const ;

    CPosition* Dup( ) const { return new CAbsolutePos( *this ) ; }
} ;

} } // end of namespace

#endif

---