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koffice/karbon/commands/vcommand.cpp

385 lines
6.3 KiB

/* This file is part of the KDE project
Copyright (C) 2001, The Karbon Developers
Copyright (C) 2002, The Karbon Developers
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "tdeaction.h"
#include "tdelocale.h"
#include "vcommand.h"
#include "karbon_part.h"
VCommandHistory::VCommandHistory( KarbonPart* part )
: m_part( part ), m_undoLimit( 50 ), m_redoLimit( 30 ), m_savedPos( 0 )
{
m_commands.setAutoDelete( true );
m_undo = KStdAction::undo( this, TQT_SLOT( undo() ), m_part->actionCollection(), "koffice_undo" );
m_redo = KStdAction::redo( this, TQT_SLOT( redo() ), m_part->actionCollection(), "koffice_redo" );
clear();
}
VCommandHistory::~VCommandHistory()
{
}
void
VCommandHistory::clear()
{
if( m_savedPos != int( m_commands.count() - 1 ) )
m_savedPos = -1;
else
m_savedPos = 0;
m_commands.clear();
emit historyCleared();
if( m_undo != 0 )
{
m_undo->setEnabled( false );
m_undo->setText( i18n( "&Undo" ) );
}
if( m_redo != 0 )
{
m_redo->setEnabled( false );
m_redo->setText( i18n( "&Redo" ) );
}
}
void
VCommandHistory::addCommand( VCommand* command, bool execute )
{
if( command == 0L )
return;
if( !m_commands.isEmpty() )
{
while( m_commands.last() && !m_commands.last()->success() )
{
m_commands.removeLast();
emit lastCommandRemoved();
}
}
m_commands.append( command );
kdDebug(38000) << "History: new command: " << m_commands.findRef( command ) << endl;
if( execute )
{
command->execute();
emit commandExecuted( command );
}
updateActions();
emit commandAdded( command );
}
void
VCommandHistory::setUndoLimit( unsigned int limit )
{
m_undoLimit = limit;
clipCommands();
}
void
VCommandHistory::setRedoLimit( unsigned int limit )
{
m_redoLimit = limit;
clipCommands();
}
void
VCommandHistory::undo()
{
int i = m_commands.count() - 1;
if( i == -1 )
return;
while( ( i >= 0 ) && !( m_commands.at( i )->success() ) )
{
i--;
}
if( i < 0 )
return;
VCommand* cmd = m_commands.at( i );
cmd->unexecute();
emit commandExecuted( cmd );
emit commandExecuted();
clipCommands();
updateActions();
m_part->repaintAllViews();
}
void
VCommandHistory::redo()
{
int i = m_commands.count() - 1;
if( i == -1 )
return;
while( ( i >= 0 ) && !( m_commands.at( i )->success() ) )
{
i--;
}
i++;
if( i >= int( m_commands.count() ) )
return;
VCommand* cmd;
if( ( cmd = m_commands.at( i ) ) == 0L )
return;
cmd->execute();
emit commandExecuted( cmd );
emit commandExecuted();
updateActions();
m_part->repaintAllViews();
}
void
VCommandHistory::undo( VCommand* command )
{
if( ( m_commands.findRef( command ) == -1 ) || ( !command->success() ) )
return;
command->unexecute();
emit commandExecuted( command );
emit commandExecuted();
updateActions();
m_part->repaintAllViews();
}
void
VCommandHistory::redo( VCommand* command )
{
if( ( m_commands.findRef( command ) == -1 ) || ( command->success() ) )
return;
command->execute();
emit commandExecuted( command );
emit commandExecuted();
updateActions();
m_part->repaintAllViews();
}
void
VCommandHistory::undoAllTo( VCommand* command )
{
int to;
if( ( to = m_commands.findRef( command ) ) == -1 )
return;
int i = m_commands.count() - 1;
VCommand* cmd;
while( i > to )
{
cmd = m_commands.at( i-- );
if( cmd->success() )
{
cmd->unexecute();
emit commandExecuted( cmd );
}
}
emit commandExecuted();
updateActions();
m_part->repaintAllViews();
}
void
VCommandHistory::redoAllTo( VCommand* command )
{
int to;
if( ( to = m_commands.findRef( command ) ) == -1 )
return;
int i = 0;
VCommand* cmd;
while( i <= to )
{
cmd = m_commands.at( i++ );
if( !cmd->success() )
{
cmd->execute();
emit commandExecuted( cmd );
}
}
emit commandExecuted();
updateActions();
m_part->repaintAllViews();
}
void
VCommandHistory::documentSaved()
{
// I don't know how to make this work... This is a temporary hack...
// Maybe remove all undone commands before the current one ?
int i = m_commands.count() - 1;
while( ( i >= 0 ) && !( m_commands.at( i )->success() ) )
{
i--;
}
i++;
m_savedPos = i;
}
void
VCommandHistory::clipCommands()
{
while( m_commands.count() > m_undoLimit )
{
if( m_commands.removeFirst() )
m_savedPos--, emit firstCommandRemoved();
}
int i = 0;
int c = m_commands.count();
while( ( i < c ) && ( !m_commands.at( c - 1 - i )->success() ) )
{
i++;
}
i = i - m_redoLimit;
for( int j = 0; j < i; j++ )
{
if( m_commands.removeLast() )
emit lastCommandRemoved();
}
}
void
VCommandHistory::updateActions()
{
if( m_commands.count() == 0 )
{
if( m_undo != 0 )
{
m_undo->setEnabled( false );
m_undo->setText( i18n( "&Undo" ) );
}
if( m_redo != 0 )
{
m_redo->setEnabled( false );
m_redo->setText( i18n( "&Redo" ) );
}
return;
}
int i = m_commands.count() - 1;
while( ( i >= 0 ) && !( m_commands.at( i )->success() ) )
{
i--;
}
if( m_undo != 0 )
{
if( i < 0 )
{
m_undo->setEnabled( false );
m_undo->setText( i18n( "&Undo" ) );
}
else
{
m_undo->setEnabled( true );
m_undo->setText( i18n( "&Undo: " ) + m_commands.at( i )->name() );
}
}
if( m_redo != 0 )
{
if( ++i == int( m_commands.count() ) )
{
m_redo->setEnabled( false );
m_redo->setText( i18n( "&Redo" ) );
}
else
{
m_redo->setEnabled( true );
m_redo->setText( i18n( "&Redo: " ) + m_commands.at( i )->name() );
}
}
if( m_savedPos >= 0 )
{
for( i = 0; i < m_savedPos; i++ )
{
if( !m_commands.at( i )->success() )
return;
}
for( i = m_savedPos; i < int( m_commands.count() ); i++ )
{
if( m_commands.at( i )->success() )
return;
}
emit documentRestored();
}
}
#include "vcommand.moc"