/*
 * Bibliothek - DockingFrames
 * Library built on Java/Swing, allows the user to "drag and drop"
 * panels containing any Swing-Component the developer likes to add.
 * 
 * Copyright (C) 2007 Benjamin Sigg
 * 
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Benjamin Sigg
 * benjamin_sigg@gmx.ch
 * CH - Switzerland
 */
package bibliothek.gui.dock.control.relocator;

import bibliothek.gui.DockStation;
import bibliothek.gui.Dockable;
import bibliothek.gui.dock.StackDockStation;
import bibliothek.gui.dock.station.StationDropOperation;

/**
 * This merger takes two {@link StackDockStation}s and merges them into one.
 * @author Benjamin Sigg
 */
public class StackMerger implements Merger{
	public boolean canMerge( StationDropOperation operation, DockStation parent, DockStation child ){
		return parent instanceof StackDockStation && child instanceof StackDockStation; 
	}
	
	public void merge( StationDropOperation operation, DockStation parent, DockStation child ){
		merge( (StackDockStation)parent, (StackDockStation)child );
	}
	
	private void merge( StackDockStation parent, StackDockStation child ){
		StackDockStation.Insert insert = parent.getInsert();
		int index = parent.getDockableCount();
		if( insert != null ){
			index = insert.getTab();
			if( insert.isRight() ){
				index++;
			}
		}
		
		for( int i = child.getDockableCount()-1; i >= 0; i-- ){
			Dockable dockable = child.getDockable( i );
			child.remove( i );
			parent.add( dockable, index );
		}
	}
}