/*

* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Pseudo class resolver for CSS Style properties

 *

*/

package com.nokia.tools.themeinstaller.cssparser;

import java.util.Collection;

import java.util.Enumeration;

import java.util.Hashtable;

/**

 * Resolves pseudo class values by keys.

 */

public class PseudoClassResolver

    { 

    // Pseudo class keys

    public static final int UNKNOWN       = -1;

    public static final int NONE          = 0;

    public static final int FOCUS         = 1;

    public static final int PASSIVE_FOCUS = 2;

    public static final int ACTIVE        = 3;

    public static final int HOLD          = 4;

    public static final int ENABLED       = 5;

    public static final int DISABLED      = 6;

    public static final int HOVER         = 7;

    public static final int LINK          = 8;

    public static final int VISITED       = 9;

    public static final int EDIT       = 10;

    // Pseudo class values

    private static final String NONE_VALUE          = "none";

    private static final String FOCUS_VALUE         = "focus";

    private static final String PASSIVE_FOCUS_VALUE = "passivefocus";

    private static final String ACTIVE_VALUE        = "active";

    private static final String HOLD_VALUE          = "hold";

    private static final String ENABLED_VALUE       = "enabled";

    private static final String DISABLED_VALUE      = "disabled";

    private static final String HOVER_VALUE         = "hover";

    private static final String LINK_VALUE          = "link";

    private static final String VISITED_VALUE       = "visited";

    private static final String EDIT_VALUE       = "edit";

    private Hashtable iPseudoClassTable;

    /**

     * Constructor.

     */

    public PseudoClassResolver()

        {

        iPseudoClassTable = new Hashtable();

        iPseudoClassTable.put( new Integer( NONE ), NONE_VALUE );

        iPseudoClassTable.put( new Integer( FOCUS ), FOCUS_VALUE );

        iPseudoClassTable.put( new Integer( PASSIVE_FOCUS ), PASSIVE_FOCUS_VALUE );

        iPseudoClassTable.put( new Integer( ACTIVE ), ACTIVE_VALUE );

        iPseudoClassTable.put( new Integer( HOLD ), HOLD_VALUE );

        iPseudoClassTable.put( new Integer( ENABLED ), ENABLED_VALUE );

        iPseudoClassTable.put( new Integer( DISABLED ), DISABLED_VALUE );

        iPseudoClassTable.put( new Integer( HOVER ), HOVER_VALUE );

        iPseudoClassTable.put( new Integer( LINK ), LINK_VALUE );

        iPseudoClassTable.put( new Integer( VISITED ), VISITED_VALUE );

        iPseudoClassTable.put( new Integer( EDIT ), EDIT_VALUE );

        }

    /**

     * Get pseudo class value by its key.

     * @param aClassKey Pseudo class key, for example, FOCUS

     * @return Pseudo class value, for example, "focus". Returns null if

     * the value can not be resolved.

     */

    public String getValue( Integer aClassKey )

        {

        return ( String ) iPseudoClassTable.get( aClassKey );

        }

    /**

     * Get pseudo class key by its value.

     * @param aClassValue Pseudo class value, for example, "focus"

     * @return Pseudo class key, for example, FOCUS. Returns UNKNOWN if the

     * value can not be resolved.

     */

    public int getKey( String aClassValue )

        {

        int result = UNKNOWN;

        Enumeration keys = iPseudoClassTable.keys();

        while ( keys.hasMoreElements() )

            {

            int key = ( ( Integer ) keys.nextElement() ).intValue();

            if ( aClassValue.equals( getValue( new Integer( key ) ) ) )

                {

                result = key;

                break;

                }

            }

        return result;

        }

    /**

     * Gets the table of pseudo class values.

     *

     * @return The table

     */

    public Collection getPseudoTypes()

        {

        return iPseudoClassTable.values();

        }

    }