/*

  * $Id: HistoryComboBoxModel.java,v 1.4 2007/09/26 12:29:29 edankert Exp $

  *

  * The contents of this file are subject to the Mozilla Public License 

  * Version 1.1 (the "License"); you may not use this file except in 

  * compliance with the License. You may obtain a copy of the License at 

  * http://www.mozilla.org/MPL/ 

  *

  * Software distributed under the License is distributed on an "AS IS" basis, 

  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 

  * for the specific language governing rights and limitations under the License.

  *

  * The Original Code is XML Hammer code. (org.xmlhammer.*)

  *

  * The Initial Developer of the Original Code is Edwin Dankert. Portions created 

  * by the Initial Developer are Copyright (C) 2005 - 2006 the Initial Developer. 

  * All Rights Reserved.

  *

  * Contributor(s): Edwin Dankert <edankert@gmail.com>

  */

 package org.xmlhammer.gui.history;

 import java.util.List;

 import javax.swing.AbstractListModel;

 import javax.swing.ComboBoxModel;

 import javax.swing.event.ListDataEvent;

 import javax.swing.event.ListDataListener;

 import org.xmlhammer.model.preferences.HistoryList;

 public class HistoryComboBoxModel extends AbstractListModel implements ComboBoxModel, ListDataListener {

     private static final long serialVersionUID = -6751506903190064987L;

     private Object item = null;

     private HistoryListModel model = null;

     public HistoryComboBoxModel(HistoryListModel model) {

         this.model = model;

         model.addListDataListener(this);

     }

     public void intervalAdded(ListDataEvent event) {

         fireIntervalAdded(event.getSource(), event.getIndex0(), event.getIndex1());

     }

     public void intervalRemoved(ListDataEvent event) {

         fireIntervalRemoved(event.getSource(), event.getIndex0(), event.getIndex1());

     }

     public void contentsChanged(ListDataEvent event) {

         fireContentsChanged(event.getSource(), event.getIndex0(), event.getIndex1());

     }

     public void setSelectedItem(Object item) {

         if(this.item != null && !this.item.equals(item) || this.item == null && item != null) {

             this.item = item;

             fireContentsChanged(this, -1, -1);

         }

     }

     public Object getSelectedItem() {

         return item;

     }

     public int getSize() {

         return model.getSize();

     }

     public Object getElementAt(int index) {

         return model.getElementAt(index);

     }

     public void removeListener() {

         model.removeListDataListener(this);

     }

     public void add(String value) {

         HistoryList history = model.getHistory();

         if (value != null && value.length() > 0) {

             List<String> list = history.getValue();

             for (String item : list) {

                 if (item.equals(value)) {

                     list.remove(item);

                     model.removeElement(value);

                     break;

                 }

             }

             list.add(0, value);

             model.add(0, value);

             if (history.getSize() < list.size()) {

                 // remove the last item!

                 String last = list.get(list.size()-1);

                 model.removeElement(last);

                 list.remove(last);

             }

         }

     }

 }