/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.internal;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.preferences.AbstractPreferenceInitializer;
import org.eclipse.core.runtime.preferences.DefaultScope;
import org.eclipse.core.runtime.preferences.IEclipsePreferences;
import org.eclipse.core.runtime.preferences.IScopeContext;
import org.eclipse.core.runtime.preferences.InstanceScope;
import org.eclipse.core.runtime.preferences.IEclipsePreferences.NodeChangeEvent;
import org.eclipse.ui.IWorkbenchPreferenceConstants;
import org.eclipse.ui.keys.IBindingService;
import org.eclipse.ui.themes.IThemeManager;
import org.osgi.service.prefs.BackingStoreException;

/**
 * Implementation of the UI plugin's preference extension's customization
 * element. This is needed in order to force the UI plugin's preferences to be
 * initialized properly when running without
 * org.eclipse.core.runtime.compatibility. For more details, see bug 58975 - New
 * preference mechanism does not properly initialize defaults.
 * 
 * @since 3.0
 */
public class UIPreferenceInitializer extends AbstractPreferenceInitializer {
	
	public void initializeDefaultPreferences() {

		IScopeContext context = new DefaultScope();
		IEclipsePreferences node = context.getNode(UIPlugin
				.getDefault().getBundle().getSymbolicName());
		node.put(IWorkbenchPreferenceConstants.OPEN_NEW_PERSPECTIVE,
				IWorkbenchPreferenceConstants.OPEN_PERSPECTIVE_REPLACE);

		//Deprecated but kept for backwards compatibility
		node.put(IWorkbenchPreferenceConstants.PROJECT_OPEN_NEW_PERSPECTIVE,
				IWorkbenchPreferenceConstants.OPEN_PERSPECTIVE_REPLACE);
		node.put(IWorkbenchPreferenceConstants.SHIFT_OPEN_NEW_PERSPECTIVE,
				IWorkbenchPreferenceConstants.OPEN_PERSPECTIVE_REPLACE);
		node.put(IWorkbenchPreferenceConstants.ALTERNATE_OPEN_NEW_PERSPECTIVE,
				IWorkbenchPreferenceConstants.OPEN_PERSPECTIVE_REPLACE);

		//Although there is no longer any item on the preference pages
		//for setting the linking preference, since it is now a per-part
		// setting, it remains as a preference to allow product overrides of the
		//initial state of linking in the Navigator. By default, linking is
		// off.
		node.putBoolean(IWorkbenchPreferenceConstants.LINK_NAVIGATOR_TO_EDITOR,
				false);

		//Appearance / Presentation preferences
		node.put(IWorkbenchPreferenceConstants.PRESENTATION_FACTORY_ID,
				"org.eclipse.ui.presentations.default"); //$NON-NLS-1$
		node
				.putBoolean(
						IWorkbenchPreferenceConstants.SHOW_TRADITIONAL_STYLE_TABS,
						true);
		node.putBoolean(IWorkbenchPreferenceConstants.ENABLE_ANIMATIONS, true);
		node.put(IWorkbenchPreferenceConstants.DOCK_PERSPECTIVE_BAR,
				IWorkbenchPreferenceConstants.TOP_LEFT);
		node.putBoolean(
				IWorkbenchPreferenceConstants.SHOW_TEXT_ON_PERSPECTIVE_BAR,
				true);

		//the fast view bar should be on the bottom of a fresh workspace
		node.put(IWorkbenchPreferenceConstants.INITIAL_FAST_VIEW_BAR_LOCATION,
				IWorkbenchPreferenceConstants.BOTTOM);

		//default to showing intro on startup
		node.putBoolean(IWorkbenchPreferenceConstants.SHOW_INTRO, true);

		//Default to the standard key configuration.
		node.put(IWorkbenchPreferenceConstants.KEY_CONFIGURATION_ID,
				IBindingService.DEFAULT_DEFAULT_ACTIVE_SCHEME_ID);

		//Preference for showing system jobs in the jobs view
		node.putBoolean(IWorkbenchPreferenceConstants.SHOW_SYSTEM_JOBS,false);

		//Set the default theme.
		node.put(IWorkbenchPreferenceConstants.CURRENT_THEME_ID,
				IThemeManager.DEFAULT_THEME);
		
		//The default character width is undefined (i.e., -1)
		node
				.putInt(
						IWorkbenchPreferenceConstants.EDITOR_MINIMUM_CHARACTERS,
						-1);

        // Default for closing editors on exit.
        node.putBoolean(IWorkbenchPreferenceConstants.CLOSE_EDITORS_ON_EXIT, false);
        
        // Default for using window working sets 
        node.putBoolean(IWorkbenchPreferenceConstants.USE_WINDOW_WORKING_SET_BY_DEFAULT, false);

        // Default for showing filter text widget that determines what is shown in a FilteredTree
        node.putBoolean(IWorkbenchPreferenceConstants.SHOW_FILTERED_TEXTS, true);
        
        // Default for enabling detached views
        node.putBoolean(IWorkbenchPreferenceConstants.ENABLE_DETACHED_VIEWS, true);
        
		IEclipsePreferences rootNode = (IEclipsePreferences) Platform
				.getPreferencesService().getRootNode()
				.node(InstanceScope.SCOPE);

		final String uiName = UIPlugin.getDefault().getBundle()
				.getSymbolicName();
		try {
			if (rootNode.nodeExists(uiName))
				((IEclipsePreferences) rootNode.node(uiName)).addPreferenceChangeListener(PlatformUIPreferenceListener.getSingleton());
		} catch (BackingStoreException e) {
			IStatus status = new Status(IStatus.ERROR, UIPlugin.getDefault().getBundle().getSymbolicName(),IStatus.ERROR,e.getLocalizedMessage(),e);
			UIPlugin.getDefault().getLog().log(status);
		}

		rootNode
				.addNodeChangeListener(new IEclipsePreferences.INodeChangeListener() {
					/*
					 * (non-Javadoc)
					 * 
					 * @see org.eclipse.core.runtime.preferences.IEclipsePreferences.INodeChangeListener#added(org.eclipse.core.runtime.preferences.IEclipsePreferences.NodeChangeEvent)
					 */
					public void added(NodeChangeEvent event) {
						if (!event.getChild().name().equals(uiName))
							return;
						((IEclipsePreferences) event.getChild())
								.addPreferenceChangeListener(PlatformUIPreferenceListener.getSingleton());

					}

					/*
					 * (non-Javadoc)
					 * 
					 * @see org.eclipse.core.runtime.preferences.IEclipsePreferences.INodeChangeListener#removed(org.eclipse.core.runtime.preferences.IEclipsePreferences.NodeChangeEvent)
					 */
					public void removed(NodeChangeEvent event) {
						// Nothing to do here

					}

				});
	}

}