~ubuntu-branches/ubuntu/oneiric/tuxguitar/oneiric

package org.herac.tuxguitar.gui.undo.undoables.measure;

 

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

 

import org.herac.tuxguitar.gui.TuxGuitar;

import org.herac.tuxguitar.gui.undo.CannotRedoException;

import org.herac.tuxguitar.gui.undo.CannotUndoException;

import org.herac.tuxguitar.gui.undo.UndoableEdit;

import org.herac.tuxguitar.gui.undo.undoables.UndoableCaretHelper;

import org.herac.tuxguitar.song.helpers.TGSongSegment;

import org.herac.tuxguitar.song.helpers.TGSongSegmentHelper;

import org.herac.tuxguitar.song.models.TGMarker;

 

public class UndoableRemoveMeasure implements UndoableEdit{

        private int doAction;

        private UndoableCaretHelper undoCaret;

        private UndoableCaretHelper redoCaret;

        private TGSongSegment tracksMeasures;

        private UndoMarkers undoMarkers;

        private int n1;

        private int n2;

        

        public UndoableRemoveMeasure(int n1,int n2){

                this.doAction = UNDO_ACTION;

                this.undoCaret = new UndoableCaretHelper();

                this.n1 = n1;

                this.n2 = n2;

                this.tracksMeasures = new TGSongSegmentHelper(TuxGuitar.instance().getSongManager()).copyMeasures(n1,n2);

                this.undoMarkers = new UndoMarkers();

        }

        

        public void redo() throws CannotRedoException {

                if(!canRedo()){

                        throw new CannotRedoException();

                }

                TuxGuitar.instance().getSongManager().removeMeasureHeaders(this.n1,this.n2);

                TuxGuitar.instance().fireUpdate();

                

                this.redoCaret.update();

                this.doAction = UNDO_ACTION;

        }

        

        public void undo() throws CannotUndoException {

                if(!canUndo()){

                        throw new CannotUndoException();

                }

                new TGSongSegmentHelper(TuxGuitar.instance().getSongManager()).insertMeasures(this.tracksMeasures.clone(TuxGuitar.instance().getSongManager().getFactory()),this.n1,0,0);

                

                TuxGuitar.instance().fireUpdate();

                this.undoMarkers.undo();

                this.undoCaret.update();

                

                this.doAction = REDO_ACTION;

        }

        

        public boolean canRedo() {

                return (this.doAction == REDO_ACTION);

        }

        

        public boolean canUndo() {

                return (this.doAction == UNDO_ACTION);

        }

        

        public UndoableRemoveMeasure endUndo(){

                this.redoCaret = new UndoableCaretHelper();

                return this;

        }

        

        private class UndoMarkers{

                private List markers;

                

                public UndoMarkers(){

                        this.markers = new ArrayList();

                        Iterator it = TuxGuitar.instance().getSongManager().getMarkers().iterator();

                        while(it.hasNext()){

                                this.markers.add(((TGMarker)it.next()).clone(TuxGuitar.instance().getSongManager().getFactory()));

                        }

                }

                

                public void undo(){

                        TuxGuitar.instance().getSongManager().removeAllMarkers();

                        Iterator it = this.markers.iterator();

                        while(it.hasNext()){

                                TGMarker marker = (TGMarker)it.next();

                                TuxGuitar.instance().getSongManager().updateMarker(marker.clone(TuxGuitar.instance().getSongManager().getFactory()));

                        }

                }

        }

}