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4855634bf4
The cap is hardcoded to 100 for now, TODO: make this number configurable (or even better: use a max. memory amount instead of max number of states)
173 lines
3.5 KiB
C++
173 lines
3.5 KiB
C++
/*
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* ProjectJournal.cpp - implementation of ProjectJournal
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*
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* Copyright (c) 2006-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#include <cstdlib>
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#include "ProjectJournal.h"
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#include "engine.h"
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#include "JournallingObject.h"
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#include "song.h"
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const int ProjectJournal::MAX_UNDO_STATES = 100; // TODO: make this configurable in settings
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ProjectJournal::ProjectJournal() :
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m_joIDs(),
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m_undoCheckPoints(),
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m_redoCheckPoints(),
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m_journalling( false )
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{
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}
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ProjectJournal::~ProjectJournal()
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{
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}
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void ProjectJournal::undo()
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{
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while( !m_undoCheckPoints.isEmpty() )
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{
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CheckPoint c = m_undoCheckPoints.pop();
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JournallingObject *jo = m_joIDs[c.joID];
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if( jo )
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{
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DataFile curState( DataFile::JournalData );
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jo->saveState( curState, curState.content() );
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m_redoCheckPoints.push( CheckPoint( c.joID, curState ) );
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bool prev = isJournalling();
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setJournalling( false );
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jo->restoreState( c.data.content().firstChildElement() );
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setJournalling( prev );
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engine::getSong()->setModified();
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break;
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}
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}
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}
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void ProjectJournal::redo()
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{
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while( !m_redoCheckPoints.isEmpty() )
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{
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CheckPoint c = m_redoCheckPoints.pop();
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JournallingObject *jo = m_joIDs[c.joID];
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if( jo )
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{
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DataFile curState( DataFile::JournalData );
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jo->saveState( curState, curState.content() );
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m_undoCheckPoints.push( CheckPoint( c.joID, curState ) );
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bool prev = isJournalling();
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setJournalling( false );
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jo->restoreState( c.data.content().firstChildElement() );
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setJournalling( prev );
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engine::getSong()->setModified();
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break;
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}
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}
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}
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void ProjectJournal::addJournalCheckPoint( JournallingObject *jo )
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{
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if( isJournalling() )
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{
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m_redoCheckPoints.clear();
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DataFile dataFile( DataFile::JournalData );
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jo->saveState( dataFile, dataFile.content() );
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m_undoCheckPoints.push( CheckPoint( jo->id(), dataFile ) );
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if( m_undoCheckPoints.size() > MAX_UNDO_STATES )
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{
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m_undoCheckPoints.remove( 0, m_undoCheckPoints.size() - MAX_UNDO_STATES );
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}
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}
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}
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jo_id_t ProjectJournal::allocID( JournallingObject * _obj )
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{
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const jo_id_t EO_ID_MAX = (1 << 23)-1;
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jo_id_t id;
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while( m_joIDs.contains( id =
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static_cast<jo_id_t>( (jo_id_t)rand()*(jo_id_t)rand() %
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EO_ID_MAX ) ) )
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{
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}
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m_joIDs[id] = _obj;
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//printf("new id: %d\n", id );
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return id;
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}
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void ProjectJournal::reallocID( const jo_id_t _id, JournallingObject * _obj )
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{
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//printf("realloc %d %d\n", _id, _obj );
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// if( m_joIDs.contains( _id ) )
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{
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m_joIDs[_id] = _obj;
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}
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}
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void ProjectJournal::clearJournal()
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{
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m_undoCheckPoints.clear();
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m_redoCheckPoints.clear();
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for( JoIdMap::Iterator it = m_joIDs.begin(); it != m_joIDs.end(); )
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{
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if( it.value() == NULL )
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{
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it = m_joIDs.erase( it );
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}
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else
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{
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++it;
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}
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}
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}
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