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The source code/* * Sun Public License Notice * * The contents of this file are subject to the Sun Public License * Version 1.0 (the "License"). You may not use this file except in * compliance with the License. A copy of the License is available at * http://www.sun.com/ * * The Original Code is NetBeans. The Initial Developer of the Original * Code is Sun Microsystems, Inc. Portions Copyright 1997-2000 Sun * Microsystems, Inc. All Rights Reserved. */ package org.netbeans.modules.editor.options; import java.beans.beancontext.BeanContextChild; import java.beans.beancontext.BeanContext; import java.beans.beancontext.BeanContextMembershipListener; import java.beans.beancontext.BeanContextMembershipEvent; import java.util.Iterator; import java.util.Arrays; import org.netbeans.editor.Settings; import org.openide.options.ContextSystemOption; import org.openide.options.SystemOption; /** * Listener that adds/removes the initializers corresponding * to the options to the Settings and performs the resetting * of the Settings. * * @author Miloslav Metelka * @version 1.00 */ class ContextOptionsListener implements BeanContextMembershipListener { /** Whether debug messages should be displayed */ private static final boolean debug = Boolean.getBoolean("netbeans.debug.editor.options"); // NOI18N /** Only one shared instance is used. The side-effect advantage is * that BeanContextSupport will not add the same listener twice. */ private static final ContextOptionsListener sharedListener = new ContextOptionsListener(); /** Process the existing options added to the context system option * and start listening on the changes. */ static void processExistingAndListen(ContextSystemOption cso) { BeanContextChild bcc = cso.getBeanContextProxy(); // Start listening first if (bcc instanceof BeanContext) { ((BeanContext)bcc).addBeanContextMembershipListener(sharedListener); } // Process all the currently added options SystemOption[] sos = cso.getOptions(); if (sos != null) { sharedListener.processInitializers(Arrays.asList(sos).iterator(), false); } } private ContextOptionsListener() { } public void childrenAdded(BeanContextMembershipEvent bcme) { processInitializers(bcme.iterator(), false); } public void childrenRemoved(BeanContextMembershipEvent bcme) { processInitializers(bcme.iterator(), true); } private void processInitializers(Iterator it, boolean remove) { while (it.hasNext()) { Object o = it.next(); if (o instanceof OptionSupport) { OptionSupport os = (OptionSupport)o; Settings.Initializer si = os.getSettingsInitializer(); // Remove the old one Settings.removeInitializer(si.getName()); if (!remove) { // add the new one Settings.addInitializer(si, Settings.OPTION_LEVEL); } if (debug) { System.err.println((remove ? "Removed" : "Refreshed") // NOI18N + " initializer=" + si.getName()); // NOI18N } } } /* Reset the settings so that the new initializers take effect * or the old are removed. */ Settings.reset(); } } |
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