| /****************************************************************************** |
| * Copyright (c) 2005 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.gmf.runtime.common.ui.action.global.providers; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.MessageBox; |
| import org.eclipse.ui.IWorkbenchPart; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.PlatformUI; |
| |
| import org.eclipse.gmf.runtime.common.core.command.ICommand; |
| import org.eclipse.gmf.runtime.common.ui.action.internal.l10n.CommonUIActionMessages; |
| import org.eclipse.gmf.runtime.common.ui.editors.IRevertiblePart; |
| import org.eclipse.gmf.runtime.common.ui.services.action.global.AbstractGlobalActionHandler; |
| import org.eclipse.gmf.runtime.common.ui.services.action.global.IGlobalActionContext; |
| |
| /** |
| * A default global action handler for the revert retargetable action. |
| * |
| * @author ldamus |
| */ |
| public class RevertGlobalActionHandler |
| extends AbstractGlobalActionHandler { |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.gmf.runtime.common.ui.internal.action.global.IGlobalActionHandler#canHandle(org.eclipse.gmf.runtime.common.ui.internal.action.global.IGlobalActionContext) |
| */ |
| public boolean canHandle(IGlobalActionContext context) { |
| IRevertiblePart revertablePart = getRevertablePart(context |
| .getActivePart()); |
| |
| if (revertablePart != null) { |
| return revertablePart.isDirty(); |
| } |
| |
| return false; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.gmf.runtime.common.ui.internal.action.global.IGlobalActionHandler#getCommand(org.eclipse.gmf.runtime.common.ui.internal.action.global.IGlobalActionContext) |
| */ |
| public ICommand getCommand(IGlobalActionContext context) { |
| |
| IRevertiblePart revertablePart = getRevertablePart(context |
| .getActivePart()); |
| |
| if (revertablePart != null) { |
| |
| if (confirmRevert()) { |
| revertablePart.doRevertToSaved(); |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Prompts the user for confirmation of the revert action. |
| * |
| * @return <code>true</code> if the user confirms that they want to |
| * revert, <code>false</code> otherwise. |
| */ |
| private boolean confirmRevert() { |
| IWorkbenchWindow window = PlatformUI.getWorkbench() |
| .getActiveWorkbenchWindow(); |
| |
| if (window != null) { |
| |
| String message = CommonUIActionMessages.RevertGlobalActionHandler_messageBox_message |
| + "\n\n" + CommonUIActionMessages.RevertGlobalActionHandler_messageBox_prompt; //$NON-NLS-1$ |
| |
| MessageBox messageBox = new MessageBox(window.getShell(), SWT.YES |
| | SWT.NO | SWT.CANCEL | SWT.ICON_QUESTION); |
| |
| messageBox.setText(CommonUIActionMessages.RevertGlobalActionHandler_messageBox_title); |
| messageBox.setMessage(message); |
| |
| if (messageBox.open() == SWT.YES) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Casts or adapts the <code>workbenchPart</code> to an |
| * <code>IRevertiblePart</code>, if possible. |
| * |
| * @param workbenchPart |
| * the part |
| * @return the <code>IRevertiblePart</code>, or <code>null</code> if |
| * the <code>workbenchPart</code> could not be adapted to an |
| * <code>IRevertiblePart</code>. |
| */ |
| private IRevertiblePart getRevertablePart(IWorkbenchPart workbenchPart) { |
| |
| IRevertiblePart revertablePart = null; |
| |
| if (workbenchPart != null) { |
| |
| if (workbenchPart instanceof IRevertiblePart) { |
| revertablePart = (IRevertiblePart) workbenchPart; |
| |
| } else { |
| revertablePart = (IRevertiblePart) workbenchPart |
| .getAdapter(IRevertiblePart.class); |
| } |
| } |
| |
| return revertablePart; |
| } |
| } |