/*
 * 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 .
 */

import com.sun.star.uno.UnoRuntime;
import com.sun.star.accessibility.XAccessible;
import com.sun.star.accessibility.XAccessibleContext;
import com.sun.star.accessibility.XAccessibleSelection;
import com.sun.star.lang.IndexOutOfBoundsException;



class AccessibleSelectionHandler
    extends NodeHandler
{
    public NodeHandler createHandler( XAccessibleContext xContext )
    {
        XAccessibleSelection xSelection =
            UnoRuntime.queryInterface(
            XAccessibleSelection.class, xContext);
        return (xSelection == null) ? null :
            new AccessibleSelectionHandler(xSelection);
    }

    public AccessibleSelectionHandler()
    {
    }

    public AccessibleSelectionHandler( XAccessibleSelection xSelection )
    {
        if (xSelection != null)
            maChildList.setSize( 2 );
    }

    public AccessibleTreeNode createChild( AccessibleTreeNode aParent,
                                           int nIndex )
    {
        AccessibleTreeNode aChild = null;

        if( aParent instanceof AccTreeNode )
        {
            XAccessibleSelection xSelection =
                ((AccTreeNode)aParent).getSelection();
            if( xSelection != null )
            {
                switch( nIndex )
                {
                    case 0:
                        aChild = new StringNode(
                            "getSelectedAccessibleChildCount: " +
                            xSelection.getSelectedAccessibleChildCount(),
                            aParent );
                        break;
                    case 1:
                    {
                        VectorNode aVNode =
                            new VectorNode( "Selected Children", aParent);
                        int nSelected = 0;
                        int nCount = ((AccTreeNode)aParent).getContext().
                            getAccessibleChildCount();
                        try
                        {
                            for( int i = 0; i < nCount; i++ )
                            {
                                try
                                {
                                    if( xSelection.isAccessibleChildSelected( i ) )
                                    {
                                        XAccessible xSelChild = xSelection.
                                            getSelectedAccessibleChild(nSelected);
                                        XAccessible xNChild =
                                            ((AccTreeNode)aParent).
                                            getContext().getAccessibleChild( i );
                                        aVNode.addChild( new StringNode(
                                            i + ": " +
                                            xNChild.getAccessibleContext().
                                            getAccessibleDescription() + " (" +
                                            (xSelChild.equals(xNChild) ? "OK" : "XXX") +
                                            ")", aParent ) );
                                    }
                                }
                                catch (com.sun.star.lang.DisposedException e)
                                {
                                    aVNode.addChild( new StringNode(
                                        i + ": caught DisposedException while creating",
                                        aParent ));
                                }
                            }
                            aChild = aVNode;
                        }
                        catch( IndexOutOfBoundsException e )
                        {
                            aChild = new StringNode( "IndexOutOfBounds",
                                                     aParent );
                        }
                    }
                    break;
                    default:
                        aChild = new StringNode( "ERROR", aParent );
                        break;
                }
            }
        }

        return aChild;
    }


    public String[] getActions (AccessibleTreeNode aNode)
    {
        if( aNode instanceof AccTreeNode )
        {
            XAccessibleSelection xSelection =
                ((AccTreeNode)aNode).getSelection();
            if( xSelection != null )
            {
                return new String[] { "Select..." };
            }
        }
        return new String[0];
    }

    public void performAction (AccessibleTreeNode aNode, int nIndex)
    {
        new SelectionDialog( (AccTreeNode)aNode ).show();
    }
}