| /******************************************************************************* |
| * Copyright (c) 2000, 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.compare; |
| |
| import java.util.ResourceBundle; |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.dialogs.MessageDialog; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| |
| import org.eclipse.compare.internal.CompareMessages; |
| import org.eclipse.compare.internal.CompareUIPlugin; |
| import org.eclipse.compare.internal.Utilities; |
| |
| |
| /** |
| * A <code>NavigationAction</code> is used to navigate through the individual |
| * differences of a <code>CompareEditorInput</code>. |
| * <p> |
| * Clients may instantiate this class; it is not intended to be subclassed. |
| * </p> |
| * @since 2.0 |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class NavigationAction extends Action { |
| |
| private boolean fNext; |
| private CompareEditorInput fCompareEditorInput; |
| |
| |
| /** |
| * Creates a <code>NavigationAction</code>. |
| * |
| * @param next if <code>true</code> action goes to the next difference; otherwise to the previous difference. |
| */ |
| public NavigationAction(boolean next) { |
| this(CompareUI.getResourceBundle(), next); |
| } |
| |
| /** |
| * Creates a <code>NavigationAction</code> that initializes its attributes |
| * from the given <code>ResourceBundle</code>. |
| * |
| * @param bundle is used to initialize the action |
| * @param next if <code>true</code> action goes to the next difference; otherwise to the previous difference. |
| */ |
| public NavigationAction(ResourceBundle bundle, boolean next) { |
| Utilities.initAction(this, bundle, next ? "action.Next." : "action.Previous."); //$NON-NLS-2$ //$NON-NLS-1$ |
| fNext= next; |
| } |
| |
| public void run() { |
| if (fCompareEditorInput != null) { |
| Object adapter= fCompareEditorInput.getAdapter(ICompareNavigator.class); |
| if (adapter instanceof ICompareNavigator) { |
| boolean atEnd= ((ICompareNavigator)adapter).selectChange(fNext); |
| Shell shell= CompareUIPlugin.getShell(); |
| if (atEnd && shell != null) { |
| |
| Display display= shell.getDisplay(); |
| if (display != null) |
| display.beep(); |
| |
| String title; |
| String message; |
| if (fNext) { |
| title= CompareMessages.CompareNavigator_atEnd_title; |
| message= CompareMessages.CompareNavigator_atEnd_message; |
| } else { |
| title= CompareMessages.CompareNavigator_atBeginning_title; |
| message= CompareMessages.CompareNavigator_atBeginning_message; |
| } |
| MessageDialog.openInformation(shell, title, message); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Sets the <code>CompareEditorInput</code> on which this action operates. |
| * |
| * @param input the <code>CompareEditorInput</code> on which this action operates; if <code>null</code> action does nothing |
| */ |
| public void setCompareEditorInput(CompareEditorInput input) { |
| fCompareEditorInput= input; |
| } |
| } |