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/*******************************************************************************
* Copyright (c) 2007 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.equinox.p2.ui;
import java.lang.reflect.InvocationTargetException;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.operations.*;
import org.eclipse.core.runtime.*;
import org.eclipse.equinox.p2.ui.operations.ProvisioningOperation;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.statushandlers.StatusManager;
/**
* Utility methods for clients using undo
*
* @since 3.4
*/
public class ProvisioningUndoSupport {
static ObjectUndoContext provisioningUndoContext;
/**
* Return the undo context that should be used for operations involving
* provisioning.
*
* @return the provisioning undo context
*/
public static IUndoContext getProvisioningUndoContext() {
if (provisioningUndoContext == null) {
provisioningUndoContext = new ObjectUndoContext(new Object(), "Provisioning Undo Context"); //$NON-NLS-1$
IOperationHistory opHistory = PlatformUI.getWorkbench().getOperationSupport().getOperationHistory();
opHistory.addOperationApprover(getOperationApprover());
}
return provisioningUndoContext;
}
/**
* Execute the supplied ProvisioningOperation, and add it to the
* undo history if it supports undo.
*
* @param op The operation to execute
* @param monitor
* the progress monitor to use for the operation
* @param shell provided by the caller in order to supply UI information for prompting the
* user if necessary. May be <code>null</code>.
*/
public static IStatus execute(ProvisioningOperation op, IProgressMonitor monitor, Shell shell) throws ExecutionException {
if (op instanceof IUndoableOperation) {
return PlatformUI.getWorkbench().getOperationSupport().getOperationHistory().execute((IUndoableOperation) op, monitor, getUIInfoAdapter(shell));
}
return op.execute(monitor, getUIInfoAdapter(shell));
}
static IOperationApprover getOperationApprover() {
return new IOperationApprover() {
public IStatus proceedUndoing(final IUndoableOperation operation, IOperationHistory history, IAdaptable info) {
final IStatus[] status = new IStatus[1];
status[0] = Status.OK_STATUS;
if (operation.hasContext(provisioningUndoContext) && operation instanceof IAdvancedUndoableOperation) {
final IRunnableWithProgress runnable = new IRunnableWithProgress() {
public void run(IProgressMonitor monitor) {
try {
status[0] = ((IAdvancedUndoableOperation) operation).computeUndoableStatus(monitor);
if (!status[0].isOK()) {
StatusManager.getManager().handle(status[0], StatusManager.SHOW);
}
} catch (ExecutionException e) {
status[0] = new Status(IStatus.ERROR, ProvUIActivator.PLUGIN_ID, e.getMessage(), e);
ProvUI.handleException(e.getCause(), null);
}
}
};
PlatformUI.getWorkbench().getDisplay().syncExec(new Runnable() {
public void run() {
try {
new ProgressMonitorDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell()).run(true, true, runnable);
} catch (InterruptedException e) {
// don't report thread interruption
} catch (InvocationTargetException e) {
status[0] = new Status(IStatus.ERROR, ProvUIActivator.PLUGIN_ID, e.getMessage(), e);
ProvUI.handleException(e.getCause(), null);
}
}
});
}
return status[0];
}
public IStatus proceedRedoing(final IUndoableOperation operation, IOperationHistory history, IAdaptable info) {
final IStatus[] status = new IStatus[1];
status[0] = Status.OK_STATUS;
if (operation.hasContext(provisioningUndoContext) && operation instanceof IAdvancedUndoableOperation) {
final IRunnableWithProgress runnable = new IRunnableWithProgress() {
public void run(IProgressMonitor monitor) {
try {
status[0] = ((IAdvancedUndoableOperation) operation).computeRedoableStatus(monitor);
if (!status[0].isOK()) {
StatusManager.getManager().handle(status[0], StatusManager.SHOW);
}
} catch (ExecutionException e) {
status[0] = new Status(IStatus.ERROR, ProvUIActivator.PLUGIN_ID, e.getMessage(), e);
ProvUI.handleException(e.getCause(), null);
}
}
};
PlatformUI.getWorkbench().getDisplay().syncExec(new Runnable() {
public void run() {
try {
new ProgressMonitorDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell()).run(true, true, runnable);
} catch (InterruptedException e) {
// don't report thread interruption
} catch (InvocationTargetException e) {
status[0] = new Status(IStatus.ERROR, ProvUIActivator.PLUGIN_ID, e.getMessage(), e);
ProvUI.handleException(e.getCause(), null);
}
}
});
}
return status[0];
}
};
}
/**
* Make an <code>IAdaptable</code> that adapts to the specified shell,
* suitable for passing for passing to any
* {@link org.eclipse.core.commands.operations.IUndoableOperation} or
* {@link org.eclipse.core.commands.operations.IOperationHistory} method
* that requires an {@link org.eclipse.core.runtime.IAdaptable}
* <code>uiInfo</code> parameter.
*
* @param shell
* the shell that should be returned by the IAdaptable when asked
* to adapt a shell. If this parameter is <code>null</code>,
* the returned shell will also be <code>null</code>.
*
* @return an IAdaptable that will return the specified shell.
*/
private static IAdaptable getUIInfoAdapter(final Shell shell) {
return new IAdaptable() {
public Object getAdapter(Class clazz) {
if (clazz == Shell.class) {
return shell;
}
return null;
}
};
}
}
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