/*******************************************************************************
* Copyright (c) 2007, 2009 Wind River Systems 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:
* Wind River Systems, Inc. - initial implementation
*******************************************************************************/
package org.eclipse.cdt.dsf.debug.internal.ui.viewmodel.actions;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IAdapterManager;
import org.eclipse.core.runtime.Platform;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.debug.ui.contexts.DebugContextEvent;
import org.eclipse.debug.ui.contexts.IDebugContextListener;
import org.eclipse.debug.ui.contexts.IDebugContextService;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Event;
import org.eclipse.ui.IActionDelegate2;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;
/**
* Base class for actions which delegate functionality to an adapter retrieved
* from the current debug context.
*
* @since 1.1
*/
abstract public class RetargetDebugContextAction implements IWorkbenchWindowActionDelegate, IDebugContextListener, IActionDelegate2 {
private IWorkbenchWindow fWindow = null;
private IAction fAction = null;
private ISelection fDebugContext;
private Object fTargetAdapter = null;
/* (non-Javadoc)
* @see org.eclipse.ui.IWorkbenchWindowActionDelegate#init(org.eclipse.ui.IWorkbenchWindow)
*/
public void init(IWorkbenchWindow window) {
fWindow = window;
IDebugContextService debugContextService = DebugUITools.getDebugContextManager().getContextService(fWindow);
debugContextService.addPostDebugContextListener(this);
fDebugContext = debugContextService.getActiveContext();
update();
}
public void selectionChanged(IAction action, ISelection selection) {
if (fAction != action) {
fAction = action;
}
// Update on debug context changed events
}
public void runWithEvent(IAction action, Event event) {
run(action);
}
public void run(IAction action) {
if (fTargetAdapter != null) {
try {
performAction(fTargetAdapter, fDebugContext);
} catch (CoreException e) {
ErrorDialog.openError(fWindow.getShell(), MessagesForVMActions.RetargetDebugContextAction_ErrorDialog_title, MessagesForVMActions.RetargetDebugContextAction_ErrorDialog_message, e.getStatus());
}
}
}
/**
* Returns whether the specific operation is supported.
*
* @param target the target adapter
* @param selection the selection to verify the operation on
* @param part the part the operation has been requested on
* @return whether the operation can be performed
*/
protected abstract boolean canPerformAction(Object target, ISelection debugContext);
/**
* Performs the specific breakpoint toggling.
*
* @param selection selection in the active part
* @param part active part
* @throws CoreException if an exception occurrs
*/
protected abstract void performAction(Object target, ISelection debugContext) throws CoreException;
/**
* Returns the type of adapter (target) this action works on.
*
* @return the type of adapter this action works on
*/
protected abstract Class<?> getAdapterClass();
public void init(IAction action) {
fAction = action;
}
/* (non-Javadoc)
* @see org.eclipse.ui.texteditor.IUpdate#update()
*/
public void update() {
if (fAction == null) {
return;
}
fTargetAdapter = null;
if (fDebugContext instanceof IStructuredSelection) {
IStructuredSelection ss = (IStructuredSelection) fDebugContext;
if (!ss.isEmpty()) {
Object object = ss.getFirstElement();
if (object instanceof IAdaptable) {
fTargetAdapter = getAdapter((IAdaptable) object);
if (fTargetAdapter != null) {
fAction.setEnabled(canPerformAction(fTargetAdapter, fDebugContext));
return;
}
}
}
}
fAction.setEnabled(false);
}
public void dispose() {
DebugUITools.getDebugContextManager().getContextService(fWindow).removePostDebugContextListener(this);
fTargetAdapter = null;
}
public void debugContextChanged(DebugContextEvent event) {
fDebugContext = event.getContext();
update();
}
protected Object getAdapter(IAdaptable adaptable) {
Object adapter = adaptable.getAdapter(getAdapterClass());
if (adapter == null) {
IAdapterManager adapterManager = Platform.getAdapterManager();
if (adapterManager.hasAdapter(adaptable, getAdapterClass().getName())) {
adapter = adapterManager.loadAdapter(adaptable, getAdapterClass().getName());
}
}
return adapter;
}
}