org.eclipse.ui.internal.handlers.ResetPerspectiveHandler.java Source code

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Here is the source code for org.eclipse.ui.internal.handlers.ResetPerspectiveHandler.java

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/*******************************************************************************
 * Copyright (c) 2011 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.ui.internal.handlers;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.dialogs.MessageDialogWithToggle;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.ui.IPerspectiveDescriptor;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.ui.internal.WorkbenchMessages;
import org.eclipse.ui.internal.WorkbenchPage;
import org.eclipse.ui.internal.registry.PerspectiveDescriptor;
import org.eclipse.ui.internal.registry.PerspectiveRegistry;

/**
 * @since 3.5
 *
 */
public class ResetPerspectiveHandler extends AbstractHandler {

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.
     * ExecutionEvent)
     */
    public Object execute(ExecutionEvent event) {

        IWorkbenchWindow activeWorkbenchWindow = HandlerUtil.getActiveWorkbenchWindow(event);
        if (activeWorkbenchWindow != null) {
            WorkbenchPage page = (WorkbenchPage) activeWorkbenchWindow.getActivePage();
            if (page != null) {
                IPerspectiveDescriptor descriptor = page.getPerspective();
                if (descriptor != null) {
                    boolean offerRevertToBase = false;
                    if (descriptor instanceof PerspectiveDescriptor) {
                        PerspectiveDescriptor desc = (PerspectiveDescriptor) descriptor;
                        offerRevertToBase = desc.isPredefined() && desc.hasCustomDefinition();
                    }

                    if (offerRevertToBase) {
                        String message = NLS.bind(WorkbenchMessages.RevertPerspective_message,
                                descriptor.getLabel());
                        boolean toggleState = false;
                        MessageDialogWithToggle dialog = MessageDialogWithToggle.open(MessageDialog.QUESTION,
                                activeWorkbenchWindow.getShell(), WorkbenchMessages.RevertPerspective_title,
                                message, WorkbenchMessages.RevertPerspective_option, toggleState, null, null,
                                SWT.SHEET);
                        if (dialog.getReturnCode() == IDialogConstants.YES_ID) {
                            if (dialog.getToggleState()) {
                                PerspectiveRegistry reg = (PerspectiveRegistry) PlatformUI.getWorkbench()
                                        .getPerspectiveRegistry();
                                reg.revertPerspective(descriptor);
                            }
                            page.resetPerspective();
                        }
                    } else {
                        String message = NLS.bind(WorkbenchMessages.ResetPerspective_message,
                                descriptor.getLabel());
                        boolean result = MessageDialog.open(MessageDialog.QUESTION,
                                activeWorkbenchWindow.getShell(), WorkbenchMessages.ResetPerspective_title, message,
                                SWT.SHEET);
                        if (result) {
                            page.resetPerspective();
                        }
                    }
                }
            }
        }

        return null;
    }
}