dgChannelManip.h

00001 // -*- c++ -*-
00002 //
00003 // $Id$
00004 //
00005 // This program is free software; you can redistribute it and/or modify
00006 // it under the terms of the GNU General Public License as published by
00007 // the Free Software Foundation; either version 2 of the License, or
00008 // (at your option) any later version.
00009 //
00010 // This program is distributed in the hope that it will be useful,
00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013 // GNU General Public License for more details.
00014 //
00015 // You should have received a copy of the GNU General Public License
00016 // along with this program; if not, write to the Free Software
00017 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00018 //
00019 // This file is part of Depression Glass library.
00020 //
00021 // Copyright (c) 2002. Dimitry Kloper <kloper@users.sf.net> . 
00022 //
00023 // dgChannelManip.h -- manipulators for the channel
00024 //
00025 
00026 #ifndef _dgChannelManip_h_
00027 #define _dgChannelManip_h_
00028 
00035 #include "dgChannel.h"
00036 
00037 namespace DGD {
00038 
00049 template <class Arg_type>
00050 class channel_manip {
00051    public:
00052       typedef void (channel::*method_type)( Arg_type );
00053    public:
00054       method_type m_method;
00055       Arg_type    m_argument;
00056       
00057       explicit channel_manip( method_type method, Arg_type arg ):
00058          m_method(method), m_argument(arg) {}
00059 };
00060 
00069 class channel_manip_void {
00070    public:
00071       typedef void (channel::*method_type)();
00072 
00073    public:
00074       method_type m_method;
00075 
00076       explicit channel_manip_void( method_type m ):
00077          m_method(m) {}
00078 };
00079 
00089 class channel_manip_nop {
00090    public:
00091       channel_manip_nop() {}
00092 };
00093 
00097 typedef channel_manip<bool> channel_manip_bool;
00098 
00102 typedef channel_manip<unsigned int>  channel_manip_uint;
00103 
00107 inline std::ostream& operator <<( std::ostream& cnl, 
00108                                   const channel_manip_void& manip ) {
00109    
00110    (dynamic_cast<channel&>(cnl).*(manip.m_method))();
00111    return cnl;
00112 }
00113 
00117 inline std::ostream& operator <<( std::ostream& cnl, 
00118                                   const channel_manip_bool& manip ) {
00119    (dynamic_cast<channel&>(cnl).*(manip.m_method))( manip.m_argument );
00120    return cnl;
00121 }
00122 
00126 inline std::ostream& operator <<( std::ostream& cnl, 
00127                                   const channel_manip_uint& manip ) {
00128    (dynamic_cast<channel&>(cnl).*(manip.m_method))( manip.m_argument );
00129    return cnl;
00130 }
00131 
00139 inline channel& operator <<( std::ostream& cnl, 
00140                              const channel_manip_nop& manip ) {
00141    
00142    return dynamic_cast<channel&>(cnl);
00143 }
00144 
00149 const channel_manip_void incr = channel_manip_void( &channel::incr_indent );
00150 
00155 const channel_manip_void decr = channel_manip_void( &channel::decr_indent );
00156 
00204 const channel_manip_nop  dgd  = channel_manip_nop();
00205 
00210 inline channel_manip_uint step( unsigned int s ) {
00211    return channel_manip_uint( &channel::indent_step, s );
00212 }
00213 
00218 inline channel_manip_uint indent( unsigned int s ) {
00219    return channel_manip_uint( &channel::indent, s );
00220 }
00221 
00226 inline channel_manip_uint minwidth( unsigned int s ) {
00227    return channel_manip_uint( &channel::min_width, s );
00228 }
00229 
00234 inline channel_manip_uint maxwidth( unsigned int s ) {
00235    return channel_manip_uint( &channel::max_width, s );
00236 }
00237 
00242 inline channel_manip_bool wrap( bool s ) {
00243    return channel_manip_bool( &channel::wrap, s );
00244 }
00245 
00250 inline channel_manip_bool word_wrap( bool s ) {
00251    return channel_manip_bool( &channel::word_wrap, s );
00252 }
00253 
00254 }; // end of namespace DGD
00255 
00256 #endif /* _dgChannelManip_h_ */
00257 
00258 /* 
00259  * Local Variables:
00260  * compile-command: "make dgChannelManip.obj"
00261  * End:
00262  */
00263 
00264