| /******************************************************************************* |
| * Copyright (c) 2005, 2016 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.debug.internal.ui.viewers.provisional; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.ISafeRunnable; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.ListenerList; |
| import org.eclipse.core.runtime.SafeRunner; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.core.runtime.jobs.Job; |
| import org.eclipse.debug.internal.ui.DebugUIPlugin; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelChangedListener; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelDelta; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelProxy2; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext; |
| import org.eclipse.debug.internal.ui.viewers.model.provisional.ITreeModelViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| |
| /** |
| * Common function for a model proxy. |
| * <p> |
| * Clients may subclass this class. |
| * </p> |
| * @since 3.2 |
| */ |
| public abstract class AbstractModelProxy implements IModelProxy2 { |
| |
| private IPresentationContext fContext; |
| private boolean fInstalled = false; |
| private ITreeModelViewer fViewer; |
| private boolean fDisposed = false; |
| private Job fInstallJob; |
| |
| |
| private ListenerList<IModelChangedListener> fListeners = new ListenerList<>(); |
| |
| protected ListenerList<IModelChangedListener> getListeners() { |
| synchronized (fListeners) { |
| return fListeners; |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.IModelProxy#addModelChangedListener(org.eclipse.debug.internal.ui.viewers.IModelChangedListener) |
| */ |
| @Override |
| public void addModelChangedListener(IModelChangedListener listener) { |
| synchronized (fListeners) { |
| fListeners.add(listener); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.IModelProxy#removeModelChangedListener(org.eclipse.debug.internal.ui.viewers.IModelChangedListener) |
| */ |
| @Override |
| public void removeModelChangedListener(IModelChangedListener listener) { |
| synchronized (fListeners) { |
| fListeners.remove(listener); |
| } |
| } |
| |
| /** |
| * Notifies registered listeners of the given delta. |
| * |
| * @param delta model delta to broadcast |
| */ |
| public void fireModelChanged(IModelDelta delta) { |
| synchronized(this) { |
| if (!fInstalled || fDisposed) return; |
| } |
| |
| final IModelDelta root = getRootDelta(delta); |
| for (IModelChangedListener iModelChangedListener : getListeners()) { |
| final IModelChangedListener listener = iModelChangedListener; |
| ISafeRunnable safeRunnable = new ISafeRunnable() { |
| @Override |
| public void handleException(Throwable exception) { |
| DebugUIPlugin.log(exception); |
| } |
| |
| @Override |
| public void run() throws Exception { |
| listener.modelChanged(root, AbstractModelProxy.this); |
| } |
| |
| }; |
| SafeRunner.run(safeRunnable); |
| } |
| } |
| |
| /** |
| * Returns the root node of the given delta. |
| * |
| * @param delta delta node |
| * @return returns the root of the given delta |
| */ |
| protected IModelDelta getRootDelta(IModelDelta delta) { |
| IModelDelta parent = delta.getParentDelta(); |
| while (parent != null) { |
| delta = parent; |
| parent = delta.getParentDelta(); |
| } |
| return delta; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.IModelProxy#dispose() |
| */ |
| @Override |
| public synchronized void dispose() { |
| if (fInstallJob != null) { |
| fInstallJob.cancel(); |
| fInstallJob = null; |
| } |
| fDisposed = true; |
| fContext = null; |
| fViewer = null; |
| } |
| |
| protected synchronized void setInstalled(boolean installed) { |
| fInstalled = installed; |
| } |
| |
| protected synchronized boolean isInstalled() { |
| return fInstalled; |
| } |
| |
| protected synchronized void setDisposed(boolean disposed) { |
| fDisposed = disposed; |
| } |
| |
| @Override |
| public void initialize(ITreeModelViewer viewer) { |
| setDisposed(false); |
| |
| synchronized(this) { |
| fViewer = viewer; |
| fContext = viewer.getPresentationContext(); |
| fInstallJob = new Job("Model Proxy installed notification job") {//$NON-NLS-1$ |
| @Override |
| protected IStatus run(IProgressMonitor monitor) { |
| synchronized(this) { |
| fInstallJob = null; |
| } |
| if (!monitor.isCanceled()) { |
| init(getTreeModelViewer().getPresentationContext()); |
| setInstalled(true); |
| installed(getViewer()); |
| } |
| return Status.OK_STATUS; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.runtime.jobs.Job#shouldRun() |
| */ |
| @Override |
| public boolean shouldRun() { |
| return !isDisposed(); |
| } |
| }; |
| fInstallJob.setSystem(true); |
| } |
| fInstallJob.schedule(); |
| } |
| |
| /** |
| * Returns the context this model proxy is installed in. |
| * |
| * @return presentation context, or <code>null</code> if this |
| * model proxy has been disposed |
| */ |
| public synchronized IPresentationContext getPresentationContext() { |
| return fContext; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.IModelProxy#init(org.eclipse.debug.internal.ui.viewers.IPresentationContext) |
| */ |
| @Override |
| public void init(IPresentationContext context) { |
| } |
| |
| /* (non-Javadoc) |
| * |
| * Subclasses should override as required. |
| * |
| * @see org.eclipse.debug.internal.ui.viewers.provisional.IModelProxy#installed(org.eclipse.jface.viewers.Viewer) |
| */ |
| @Override |
| public void installed(Viewer viewer) { |
| } |
| |
| /** |
| * Returns the viewer this proxy is installed in. |
| * |
| * @return viewer or <code>null</code> if not installed |
| */ |
| protected Viewer getViewer() { |
| return (Viewer)fViewer; |
| } |
| |
| /** |
| * Returns the viewer this proxy is installed in. |
| * |
| * @return viewer or <code>null</code> if not installed |
| */ |
| protected ITreeModelViewer getTreeModelViewer() { |
| return fViewer; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.model.provisional.IModelProxy#isDisposed() |
| */ |
| @Override |
| public synchronized boolean isDisposed() { |
| return fDisposed; |
| } |
| |
| } |