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/*******************************************************************************
* Copyright (c) 2005, 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
* Wind River - Pawel Piech - added an evaluation context source provider (bug 229219)
*******************************************************************************/
package org.eclipse.debug.internal.ui.contexts;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.core.runtime.ISafeRunnable;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.debug.ui.contexts.DebugContextEvent;
import org.eclipse.debug.ui.contexts.IDebugContextListener;
import org.eclipse.debug.ui.contexts.IDebugContextProvider;
import org.eclipse.debug.ui.contexts.IDebugContextService;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.IPartListener2;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchPartReference;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.services.IEvaluationService;
/**
* Context service for a specific window.
*
* @since 3.2
*/
public class DebugWindowContextService implements IDebugContextService, IPartListener2, IDebugContextListener {
private Map fListenersByPartId = new HashMap();
private Map fProvidersByPartId = new HashMap();
private Map fPostListenersByPartId = new HashMap();
private IWorkbenchWindow fWindow;
private List fProviders = new ArrayList();
private DebugContextSourceProvider fSourceProvider;
public DebugWindowContextService(IWorkbenchWindow window) {
fWindow = window;
fWindow.getPartService().addPartListener(this);
IEvaluationService evaluationService = (IEvaluationService)window.getService(IEvaluationService.class);
fSourceProvider = new DebugContextSourceProvider(this, evaluationService);
}
public void dispose() {
fSourceProvider.dispose();
fWindow.getPartService().removePartListener(this);
fWindow = null;
}
public synchronized void addDebugContextProvider(IDebugContextProvider provider) {
IWorkbenchPart part = provider.getPart();
String id = null;
if (part != null) {
id = part.getSite().getId();
}
fProvidersByPartId.put(id, provider);
fProviders.add(provider);
IWorkbenchPart active = null;
IWorkbenchPage activePage = fWindow.getActivePage();
if (activePage != null) {
active = activePage.getActivePart();
}
if (fProviders.size() == 1 && (part == null || part.equals(active))) {
notify(provider);
}
provider.addDebugContextListener(this);
}
public synchronized void removeDebugContextProvider(IDebugContextProvider provider) {
int index = fProviders.indexOf(provider);
if (index >= 0) {
IWorkbenchPart part = provider.getPart();
String id = null;
if (part != null) {
id = part.getSite().getId();
}
fProvidersByPartId.remove(id);
fProviders.remove(index);
if (index == 0) {
IDebugContextProvider activeProvider = getActiveProvider();
if (activeProvider != null) {
notify(activeProvider);
} else {
notify(new DebugContextEvent(provider, new StructuredSelection(), DebugContextEvent.ACTIVATED));
}
}
}
provider.removeDebugContextListener(this);
}
/* (non-Javadoc)
* @see org.eclipse.debug.ui.contexts.IDebugContextService#addDebugContextListener(org.eclipse.debug.ui.contexts.IDebugContextListener)
*/
public void addDebugContextListener(IDebugContextListener listener) {
addDebugContextListener(listener, null);
}
public void addPostDebugContextListener(IDebugContextListener listener, String partId) {
ListenerList list = (ListenerList) fPostListenersByPartId.get(partId);
if (list == null) {
list = new ListenerList();
fPostListenersByPartId.put(partId, list);
}
list.add(listener);
}
public void addPostDebugContextListener(IDebugContextListener listener) {
addPostDebugContextListener(listener, null);
}
public void removePostDebugContextListener(IDebugContextListener listener, String partId) {
ListenerList list = (ListenerList) fPostListenersByPartId.get(partId);
if (list != null) {
list.remove(listener);
}
}
public void removePostDebugContextListener(IDebugContextListener listener) {
removePostDebugContextListener(listener, null);
}
/* (non-Javadoc)
* @see org.eclipse.debug.ui.contexts.IDebugContextService#removeDebugContextListener(org.eclipse.debug.ui.contexts.IDebugContextListener)
*/
public void removeDebugContextListener(IDebugContextListener listener) {
removeDebugContextListener(listener, null);
}
/**
* Notifies listeners of the context in the specified provider.
*
* @param provdier context provider
*/
protected void notify(IDebugContextProvider provdier) {
ISelection activeContext = provdier.getActiveContext();
if (activeContext == null) {
activeContext = new StructuredSelection();
}
notify(new DebugContextEvent(provdier, activeContext, DebugContextEvent.ACTIVATED));
}
protected void notify(DebugContextEvent event) {
notify(event, getListeners(null));
IWorkbenchPart part = event.getDebugContextProvider().getPart();
if (part != null) {
notify(event, getListeners(part));
}
notify(event, getPostListeners(null));
if (part != null) {
notify(event, getPostListeners(part));
}
}
protected void notify(final DebugContextEvent event, ListenerList list) {
if (list != null) {
Object[] listeners = list.getListeners();
for (int i = 0; i < listeners.length; i++) {
final IDebugContextListener listener = (IDebugContextListener) listeners[i];
SafeRunner.run(new ISafeRunnable() {
public void run() throws Exception {
listener.debugContextChanged(event);
}
public void handleException(Throwable exception) {
DebugUIPlugin.log(exception);
}
});
}
}
}
protected ListenerList getListeners(IWorkbenchPart part) {
String id = null;
if (part != null) {
id = part.getSite().getId();
}
return (ListenerList) fListenersByPartId.get(id);
}
protected ListenerList getPostListeners(IWorkbenchPart part) {
String id = null;
if (part != null) {
id = part.getSite().getId();
}
return (ListenerList) fPostListenersByPartId.get(id);
}
/* (non-Javadoc)
* @see org.eclipse.debug.ui.contexts.IDebugContextService#addDebugContextListener(org.eclipse.debug.ui.contexts.IDebugContextListener, java.lang.String)
*/
public synchronized void addDebugContextListener(IDebugContextListener listener, String partId) {
ListenerList list = (ListenerList) fListenersByPartId.get(partId);
if (list == null) {
list = new ListenerList();
fListenersByPartId.put(partId, list);
}
list.add(listener);
}
/* (non-Javadoc)
* @see org.eclipse.debug.ui.contexts.IDebugContextService#removeDebugContextListener(org.eclipse.debug.ui.contexts.IDebugContextListener, java.lang.String)
*/
public void removeDebugContextListener(IDebugContextListener listener, String partId) {
ListenerList list = (ListenerList) fListenersByPartId.get(partId);
if (list != null) {
list.remove(listener);
}
}
/* (non-Javadoc)
* @see org.eclipse.debug.ui.contexts.IDebugContextService#getActiveContext(java.lang.String)
*/
public ISelection getActiveContext(String partId) {
IDebugContextProvider provider = (IDebugContextProvider) fProvidersByPartId.get(partId);
if (provider != null) {
return provider.getActiveContext();
}
return null;
}
/* (non-Javadoc)
* @see org.eclipse.debug.ui.contexts.IDebugContextService#getActiveContext()
*/
public ISelection getActiveContext() {
IDebugContextProvider activeProvider = getActiveProvider();
if (activeProvider != null) {
return activeProvider.getActiveContext();
}
return null;
}
/**
* Returns the active provider or <code>null</code>
*
* @return active provider or <code>null</code>
*/
protected IDebugContextProvider getActiveProvider() {
if (!fProviders.isEmpty()) {
return (IDebugContextProvider)fProviders.get(0);
}
return null;
}
/* (non-Javadoc)
* @see org.eclipse.ui.IPartListener2#partActivated(org.eclipse.ui.IWorkbenchPartReference)
*/
public void partActivated(IWorkbenchPartReference partRef) {
IDebugContextProvider provider = (IDebugContextProvider) fProvidersByPartId.get(partRef.getId());
if (provider != null) {
int index = fProviders.indexOf(provider);
if (index > 0) {
fProviders.remove(index);
fProviders.add(0, provider);
notify(provider);
}
}
}
/* (non-Javadoc)
* @see org.eclipse.ui.IPartListener2#partBroughtToTop(org.eclipse.ui.IWorkbenchPartReference)
*/
public void partBroughtToTop(IWorkbenchPartReference partRef) {
}
/* (non-Javadoc)
* @see org.eclipse.ui.IPartListener2#partClosed(org.eclipse.ui.IWorkbenchPartReference)
*/
public synchronized void partClosed(IWorkbenchPartReference partRef) {
}
/* (non-Javadoc)
* @see org.eclipse.ui.IPartListener2#partDeactivated(org.eclipse.ui.IWorkbenchPartReference)
*/
public void partDeactivated(IWorkbenchPartReference partRef) {
}
/* (non-Javadoc)
* @see org.eclipse.ui.IPartListener2#partOpened(org.eclipse.ui.IWorkbenchPartReference)
*/
public void partOpened(IWorkbenchPartReference partRef) {
}
/* (non-Javadoc)
* @see org.eclipse.ui.IPartListener2#partHidden(org.eclipse.ui.IWorkbenchPartReference)
*/
public void partHidden(IWorkbenchPartReference partRef) {
}
/* (non-Javadoc)
* @see org.eclipse.ui.IPartListener2#partVisible(org.eclipse.ui.IWorkbenchPartReference)
*/
public void partVisible(IWorkbenchPartReference partRef) {
}
/* (non-Javadoc)
* @see org.eclipse.ui.IPartListener2#partInputChanged(org.eclipse.ui.IWorkbenchPartReference)
*/
public void partInputChanged(IWorkbenchPartReference partRef) {
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.contexts.provisional.IDebugContextEventListener#contextEvent(org.eclipse.debug.internal.ui.contexts.provisional.DebugContextEvent)
*/
public void debugContextChanged(DebugContextEvent event) {
if (!fProviders.isEmpty()) {
IDebugContextProvider provider = (IDebugContextProvider) fProviders.get(0);
if (provider == event.getDebugContextProvider()) {
notify(event);
}
}
}
}
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