content: /*******************************************************************************
   * Copyright (c) 2000, 2008 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.wst.jsdt.internal.ui.preferences;
  
  import org.eclipse.jface.dialogs.Dialog;
  import org.eclipse.jface.preference.PreferencePage;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Control;
  import org.eclipse.ui.IWorkbench;
  import org.eclipse.ui.IWorkbenchPreferencePage;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin;
  
  /**
   * Abstract preference page which is used to wrap a
   * {@link org.eclipse.wst.jsdt.internal.ui.preferences.IPreferenceConfigurationBlock}.
   * 
   * 
   */
  public abstract class AbstractConfigurationBlockPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {
  	
  	
  	private IPreferenceConfigurationBlock fConfigurationBlock;
  	private OverlayPreferenceStore fOverlayStore;
  	
  
  	/**
  	 * Creates a new preference page.
  	 */
  	public AbstractConfigurationBlockPreferencePage() {
  		setDescription();
  		setPreferenceStore();
  		fOverlayStore= new OverlayPreferenceStore(getPreferenceStore(), new OverlayPreferenceStore.OverlayKey[] {});
  		fConfigurationBlock= createConfigurationBlock(fOverlayStore);
  	}
  		
  	protected abstract IPreferenceConfigurationBlock createConfigurationBlock(OverlayPreferenceStore overlayPreferenceStore);
  	protected abstract String getHelpId();
  	protected abstract void setDescription();
  	protected abstract void setPreferenceStore();
  	
  	/*
  	 * @see IWorkbenchPreferencePage#init()
  	 */	
  	public void init(IWorkbench workbench) {
  	}
  
  	/*
  	 * @see PreferencePage#createControl(Composite)
  	 */
  	public void createControl(Composite parent) {
  		super.createControl(parent);
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(), getHelpId());
  	}
  	
  	/*
  	 * @see PreferencePage#createContents(Composite)
  	 */
  	protected Control createContents(Composite parent) {
  		
  		fOverlayStore.load();
  		fOverlayStore.start();
  		
  		Control content= fConfigurationBlock.createControl(parent);
  		
  		initialize();
  		
  		Dialog.applyDialogFont(content);
  		return content;
  	}
  	
  	private void initialize() {
  		fConfigurationBlock.initialize();
  	}
  	
      /*
  	 * @see PreferencePage#performOk()
  	 */
  	public boolean performOk() {
  		
  		fConfigurationBlock.performOk();
  
  		fOverlayStore.propagate();
  		
  		JavaScriptPlugin.getDefault().savePluginPreferences();
  		
  		return true;
  	}
  	
  	/*
  	 * @see PreferencePage#performDefaults()
  	 */
  	public void performDefaults() {
  		
  		fOverlayStore.loadDefaults();
  		fConfigurationBlock.performDefaults();
  
  		super.performDefaults();
  	}
  	
  	/*
  	 * @see DialogPage#dispose()
  	 */
  	public void dispose() {
  		
  		fConfigurationBlock.dispose();
  		
  		if (fOverlayStore != null) {
  			fOverlayStore.stop();
  			fOverlayStore= null;
  		}
  		
  		super.dispose();
  	}
  }
  