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/*
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.netbeans.modules.palette;

import java.beans.BeanInfo;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.prefs.BackingStoreException;
import java.util.prefs.Preferences;
import org.netbeans.spi.palette.PaletteController;
import org.openide.filesystems.FileObject;
import org.openide.loaders.DataFolder;
import org.openide.loaders.DataObject;
import org.openide.nodes.Node;
import org.openide.util.Lookup;
import org.openide.util.NbPreferences;
import org.openide.util.RequestProcessor;
import org.openide.util.Utilities;

/**
 * Palette settings to be remembered over IDE restarts.
 * There's an instance of these settings for each palette model instance.
 *
 * @author S. Aubrecht
 */
public final class DefaultSettings implements Settings, ModelListener, CategoryListener {

    private static final RequestProcessor RP = new RequestProcessor( "PaletteSettings", 1 ); //NOI18N
    
    private static final String NODE_ATTR_PREFIX = "psa_";
    
    private static final String NULL_VALUE = "null";
    
    private static final String[] KNOWN_PROPERTIES = new String[] {
        NODE_ATTR_PREFIX + PaletteController.ATTR_ICON_SIZE,
        NODE_ATTR_PREFIX + PaletteController.ATTR_IS_EXPANDED,
        NODE_ATTR_PREFIX + PaletteController.ATTR_IS_VISIBLE,
        NODE_ATTR_PREFIX + PaletteController.ATTR_SHOW_ITEM_NAMES
    };
    
    private Model model;
    private PropertyChangeSupport propertySupport = new PropertyChangeSupport( this );
    
    private String prefsName;
    
    private static final Logger ERR = Logger.getLogger("org.netbeans.modules.palette"); // NOI18N
    
    public DefaultSettings( Model model ) {
        this.model = model;
        prefsName = constructPrefsFileName( model );
        if( Utilities.isWindows() )
            prefsName = prefsName.toLowerCase();
        model.addModelListener( this );
        Category[] categories = model.getCategories();
        for( int i=0; i