/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
 */
package com.sun.star.wizards.ui.event;

import javax.swing.ListModel;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;

import com.sun.star.awt.XComboBox;
import com.sun.star.awt.XListBox;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.wizards.common.Helper;
import com.sun.star.wizards.common.PropertyNames;

public class ListModelBinder implements ListDataListener
{

    private XListBox unoList;
    private Object unoListModel;
    private ListModel listModel;
    private Renderer renderer = new Renderer()
    {

        public String render(Object item)
        {
            if (item == null)
            {
                return PropertyNames.EMPTY_STRING;
            }
            else
            {
                return item.toString();
            }
        }
    };

    public ListModelBinder(Object unoListBox, ListModel listModel_)
    {
        unoList = UnoRuntime.queryInterface(XListBox.class, unoListBox);
        unoListModel = UnoDataAware.getModel(unoListBox);
        setListModel(listModel_);
    }

    public void setListModel(ListModel newListModel)
    {
        if (listModel != null)
        {
            listModel.removeListDataListener(this);
        }
        listModel = newListModel;
        listModel.addListDataListener(this);
    }

    /* (non-Javadoc)
     * @see javax.swing.event.ListDataListener#contentsChanged(javax.swing.event.ListDataEvent)
     */
    public void contentsChanged(ListDataEvent lde)
    {
        short[] selected = getSelectedItems();
        for (short i = (short) lde.getIndex0(); i <= lde.getIndex1(); i++)
        {
            update(i);
        }
        setSelectedItems(selected);
    }

    protected void update(short i)
    {
        remove(i, i);
        insert(i);
    }

    protected void remove(short i1, short i2)
    {
        unoList.removeItems(i1, (short) (i2 - i1 + 1));
    }

    protected void insert(short i)
    {
        unoList.addItem(getItemString(i), i);
    }

    protected String getItemString(short i)
    {
        return getItemString(listModel.getElementAt(i));
    }

    protected String getItemString(Object item)
    {
        return renderer.render(item);
    }

    protected short[] getSelectedItems()
    {
        return (short[]) Helper.getUnoPropertyValue(unoListModel, PropertyNames.SELECTED_ITEMS);
    }

    protected void setSelectedItems(short[] selected)
    {
        Helper.setUnoPropertyValue(unoListModel, PropertyNames.SELECTED_ITEMS, selected);
    }

    /* (non-Javadoc)
     * @see javax.swing.event.ListDataListener#intervalAdded(javax.swing.event.ListDataEvent)
     */
    public void intervalAdded(ListDataEvent lde)
    {
        for (short i = (short) lde.getIndex0(); i <= lde.getIndex1(); i++)
        {
            insert(i);
        }
    }

    /* (non-Javadoc)
     * @see javax.swing.event.ListDataListener#intervalRemoved(javax.swing.event.ListDataEvent)
     */
    public void intervalRemoved(ListDataEvent lde)
    {
        remove((short) lde.getIndex0(), (short) lde.getIndex1());
    }

    public static interface Renderer
    {

        public String render(Object item);
    }

    public static void fillList(Object list, Object[] items, Renderer renderer)
    {
        XListBox xlist = UnoRuntime.queryInterface(XListBox.class, list);
        Helper.setUnoPropertyValue(UnoDataAware.getModel(list), PropertyNames.STRING_ITEM_LIST, new String[]
                {
                });
        for (short i = 0; i < items.length; i++)
        {
            if (items[i] != null)
            {
                xlist.addItem((renderer != null ? renderer.render(items[i]) : items[i].toString()), i);
            }
        }
    }

    public static void fillComboBox(Object list, Object[] items, Renderer renderer)
    {
        XComboBox xComboBox = UnoRuntime.queryInterface(XComboBox.class, list);
        Helper.setUnoPropertyValue(UnoDataAware.getModel(list), PropertyNames.STRING_ITEM_LIST, new String[]
                {
                });
        for (short i = 0; i < items.length; i++)
        {
            if (items[i] != null)
            {
                xComboBox.addItem((renderer != null ? renderer.render(items[i]) : items[i].toString()), i);
            }
        }
    }
}