| /******************************************************************************* |
| * Copyright (c) 2000, 2008 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.texteditor.quickdiff; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.action.IMenuListener; |
| import org.eclipse.jface.action.IMenuManager; |
| import org.eclipse.jface.action.MenuManager; |
| import org.eclipse.jface.action.Separator; |
| import org.eclipse.jface.viewers.ISelection; |
| |
| import org.eclipse.ui.IEditorActionDelegate; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.IWorkbenchActionConstants; |
| import org.eclipse.ui.internal.texteditor.quickdiff.QuickDiffMessages; |
| import org.eclipse.ui.internal.texteditor.quickdiff.QuickDiffRestoreAction; |
| import org.eclipse.ui.internal.texteditor.quickdiff.ReferenceSelectionAction; |
| import org.eclipse.ui.internal.texteditor.quickdiff.RestoreAction; |
| import org.eclipse.ui.internal.texteditor.quickdiff.RevertBlockAction; |
| import org.eclipse.ui.internal.texteditor.quickdiff.RevertLineAction; |
| import org.eclipse.ui.internal.texteditor.quickdiff.RevertSelectionAction; |
| |
| import org.eclipse.ui.texteditor.ITextEditor; |
| import org.eclipse.ui.texteditor.ITextEditorExtension; |
| import org.eclipse.ui.texteditor.ITextEditorExtension3; |
| import org.eclipse.ui.texteditor.IUpdate; |
| |
| /** |
| * Action to toggle the line number bar's quick diff display. When turned on, quick diff shows |
| * the changes relative to the saved version of the file. |
| * |
| * @since 3.0 |
| */ |
| public class QuickDiffToggleAction implements IEditorActionDelegate, IUpdate { |
| |
| /** The editor we are working on. */ |
| ITextEditor fEditor= null; |
| |
| /** Our UI proxy action. */ |
| IAction fProxy; |
| |
| /** The restore actions associated with this toggle action. */ |
| QuickDiffRestoreAction[] fRestoreActions= |
| new QuickDiffRestoreAction[] { |
| new RevertSelectionAction(fEditor, true), |
| new RevertBlockAction(fEditor, true), |
| new RevertLineAction(fEditor, true), |
| new RestoreAction(fEditor, true), |
| }; |
| |
| /** The menu listener that adds the ruler context menu. */ |
| private IMenuListener fListener= new IMenuListener() { |
| /** Group name for additions, in CompilationUnitEditor... */ |
| private static final String GROUP_ADD= "add"; //$NON-NLS-1$ |
| /** Group name for debug contributions */ |
| private static final String GROUP_DEBUB= "debug"; //$NON-NLS-1$ |
| private static final String GROUP_QUICKDIFF= "quickdiff"; //$NON-NLS-1$ |
| private static final String MENU_ID= "quickdiff.menu"; //$NON-NLS-1$ |
| private static final String GROUP_RESTORE= "restore"; //$NON-NLS-1$ |
| |
| @Override |
| public void menuAboutToShow(IMenuManager manager) { |
| // update the toggle action itself |
| update(); |
| |
| IMenuManager menu= (IMenuManager)manager.find(MENU_ID); |
| // only add menu if it isn't there yet |
| if (menu == null) { |
| /* HACK: pre-install menu groups |
| * This is needed since we get the blank context menu, but want to show up |
| * in the same position as the extension-added QuickDiffToggleAction. |
| * The extension is added at the end (naturally), but other menus (debug, add) |
| * don't add themselves to MB_ADDITIONS or alike, but rather to the end, too. So |
| * we pre-install their respective menu groups here. |
| */ |
| if (manager.find(GROUP_DEBUB) == null) |
| manager.insertBefore(IWorkbenchActionConstants.MB_ADDITIONS, new Separator(GROUP_DEBUB)); |
| if (manager.find(GROUP_ADD) == null) |
| manager.insertAfter(IWorkbenchActionConstants.MB_ADDITIONS, new Separator(GROUP_ADD)); |
| if (manager.find(GROUP_RESTORE) == null) |
| manager.insertAfter(GROUP_ADD, new Separator(GROUP_RESTORE)); |
| if (manager.find(GROUP_QUICKDIFF) == null) |
| manager.insertAfter(GROUP_RESTORE, new Separator(GROUP_QUICKDIFF)); |
| |
| // create quickdiff menu |
| menu= new MenuManager(QuickDiffMessages.quickdiff_menu_label, MENU_ID); |
| List<ReferenceProviderDescriptor> descriptors= new QuickDiff().getReferenceProviderDescriptors(); |
| for (Iterator<ReferenceProviderDescriptor> it= descriptors.iterator(); it.hasNext();) { |
| ReferenceProviderDescriptor desc= it.next(); |
| ReferenceSelectionAction action= new ReferenceSelectionAction(desc, fEditor); |
| if (action.isEnabled()) |
| menu.add(action); |
| } |
| manager.appendToGroup(GROUP_QUICKDIFF, menu); |
| |
| // create restore menu if this action is enabled |
| if (isConnected()) { |
| for (int i= 0; i < fRestoreActions.length; i++) { |
| fRestoreActions[i].update(); |
| } |
| // only add block action if selection action is not enabled |
| if (fRestoreActions[0].isEnabled()) |
| manager.appendToGroup(GROUP_RESTORE, fRestoreActions[0]); |
| else if (fRestoreActions[1].isEnabled()) |
| manager.appendToGroup(GROUP_RESTORE, fRestoreActions[1]); |
| if (fRestoreActions[2].isEnabled()) |
| manager.appendToGroup(GROUP_RESTORE, fRestoreActions[2]); |
| if (fRestoreActions[3].isEnabled()) |
| manager.appendToGroup(GROUP_RESTORE, fRestoreActions[3]); |
| } |
| } |
| } |
| }; |
| |
| @Override |
| public void setActiveEditor(IAction action, IEditorPart targetEditor) { |
| fProxy= action; |
| removePopupMenu(); |
| if (targetEditor instanceof ITextEditor) { |
| fEditor= (ITextEditor)targetEditor; |
| } else |
| fEditor= null; |
| for (int i= 0; i < fRestoreActions.length; i++) { |
| fRestoreActions[i].setEditor(fEditor); |
| } |
| setPopupMenu(); |
| } |
| |
| /** |
| * Removes the ruler context menu listener from the current editor. |
| */ |
| private void removePopupMenu() { |
| if (!(fEditor instanceof ITextEditorExtension)) |
| return; |
| ((ITextEditorExtension)fEditor).removeRulerContextMenuListener(fListener); |
| } |
| |
| /** |
| * Installs a submenu with <code>fEditor</code>'s ruler context menu that contains the choices |
| * for the quick diff reference. This allows the toggle action to lazily install the menu once |
| * quick diff has been enabled. |
| */ |
| private void setPopupMenu() { |
| if (!(fEditor instanceof ITextEditorExtension)) |
| return; |
| ((ITextEditorExtension)fEditor).addRulerContextMenuListener(fListener); |
| } |
| |
| /** |
| * States whether this toggle action has been installed and a incremental differ has been |
| * installed with the line number bar. |
| * |
| * @return <code>true</code> if a differ has been installed on <code>fEditor</code>. |
| */ |
| boolean isConnected() { |
| if (!(fEditor instanceof ITextEditorExtension3)) |
| return false; |
| return ((ITextEditorExtension3)fEditor).isChangeInformationShowing(); |
| } |
| |
| @Override |
| public void run(IAction action) { |
| fProxy= action; |
| if (fEditor == null) |
| return; |
| |
| if (fEditor instanceof ITextEditorExtension3) { |
| ITextEditorExtension3 extension= (ITextEditorExtension3)fEditor; |
| extension.showChangeInformation(!extension.isChangeInformationShowing()); |
| } |
| } |
| |
| @Override |
| public void selectionChanged(IAction action, ISelection selection) { |
| fProxy= action; |
| } |
| |
| @Override |
| public void update() { |
| if (fProxy == null) |
| return; |
| if (isConnected()) |
| fProxy.setText(QuickDiffMessages.quickdiff_toggle_disable); |
| else |
| fProxy.setText(QuickDiffMessages.quickdiff_toggle_enable); |
| } |
| |
| } |