/*
 * 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 ov;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JLabel;

import com.sun.star.accessibility.AccessibleEventId;
import com.sun.star.accessibility.AccessibleEventObject;
import com.sun.star.accessibility.XAccessibleText;
import com.sun.star.accessibility.XAccessibleContext;
import com.sun.star.uno.UnoRuntime;

public class TextView
    extends ListeningObjectView
{
    /** Create a TextView when the given object supports the
        XAccessibleText interface.
    */
    public static ObjectView Create (
        ObjectViewContainer aContainer,
        XAccessibleContext xContext)
    {
        XAccessibleText xText = UnoRuntime.queryInterface(
                XAccessibleText.class, xContext);
        if (xText != null)
            return new TextView (aContainer);
        else
            return null;
    }


    private TextView (ObjectViewContainer aContainer)
    {
        super (aContainer);

        setLayout (new GridBagLayout());
        GridBagConstraints aConstraints = new GridBagConstraints ();

        JLabel aLabel = new JLabel ("Text:");
        aConstraints.gridy = 0;
        aConstraints.weightx = 1;
        aConstraints.fill = GridBagConstraints.HORIZONTAL;
        add (aLabel, aConstraints);

        maTextLabel = new JLabel ("");
        aConstraints.gridx = 1;
        aConstraints.fill = GridBagConstraints.NONE;
        aConstraints.anchor = GridBagConstraints.WEST;
        add (maTextLabel, aConstraints);

        aLabel = new JLabel ("Caret position:");
        aConstraints.gridx = 0;
        aConstraints.gridy = 1;
        aConstraints.weightx = 1;
        aConstraints.fill = GridBagConstraints.HORIZONTAL;
        add (aLabel, aConstraints);

        maCaretPositionLabel = new JLabel ("");
        aConstraints.gridx = 1;
        aConstraints.fill = GridBagConstraints.NONE;
        aConstraints.anchor = GridBagConstraints.WEST;
        add (maCaretPositionLabel, aConstraints);
    }


    /** Additionally to the context store a reference to the
        XAccessibleText interface.
    */
    @Override
    public void SetObject (XAccessibleContext xObject)
    {
        mxText = UnoRuntime.queryInterface(
            XAccessibleText.class, xObject);
        super.SetObject (xObject);
    }

    @Override
    synchronized public void Update ()
    {
        if (mxText == null)
        {
            maTextLabel.setText ("<null object>");
            maCaretPositionLabel.setText ("<null object>");
        }
        else
        {
            maTextLabel.setText (mxText.getText());
            maCaretPositionLabel.setText (Integer.toString(mxText.getCaretPosition()));
        }
    }

    @Override
    public String GetTitle ()
    {
        return "Text";
    }

    @Override
    public void notifyEvent (AccessibleEventObject aEvent)
    {
        System.out.println (aEvent);
        switch (aEvent.EventId)
        {
            case AccessibleEventId.TEXT_CHANGED :
            case AccessibleEventId.CARET_CHANGED :
                Update ();
                break;
        }
    }

    private final JLabel
        maTextLabel,
        maCaretPositionLabel;
    private XAccessibleText mxText;
}