| /* |
| * Copyright (c) 2013 Eike Stepper (Berlin, Germany) 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: |
| * Christian W. Damus (CEA LIST) - initial API and implementation |
| */ |
| package org.eclipse.emf.cdo.security.internal.ui.util; |
| |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.viewers.ISelectionChangedListener; |
| import org.eclipse.jface.viewers.ISelectionProvider; |
| import org.eclipse.jface.viewers.SelectionChangedEvent; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.swt.events.DisposeEvent; |
| import org.eclipse.swt.events.DisposeListener; |
| import org.eclipse.swt.events.FocusEvent; |
| import org.eclipse.swt.events.FocusListener; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.ui.IActionBars; |
| |
| import java.util.Map; |
| |
| /** |
| * A utility that manages the propagation of global actions from |
| * some nested part of an editor to the editor's action bars. |
| * |
| * @author Christian W. Damus (CEA LIST) |
| */ |
| public class ActionBarsHelper |
| { |
| private final IActionBars bars; |
| |
| private final Map<String, IAction> globalActions = new java.util.HashMap<String, IAction>(); |
| |
| private final Map<String, IAction> previousActions = new java.util.HashMap<String, IAction>(); |
| |
| public ActionBarsHelper(IActionBars actionBars) |
| { |
| bars = actionBars; |
| } |
| |
| public ActionBarsHelper addGlobalAction(String actionID, IAction action) |
| { |
| globalActions.put(actionID, action); |
| return this; |
| } |
| |
| public ActionBarsHelper install(Viewer viewer) |
| { |
| return install(viewer.getControl(), viewer); |
| } |
| |
| public ActionBarsHelper install(Control control) |
| { |
| return install(control, null); |
| } |
| |
| private ActionBarsHelper install(Control control, final ISelectionProvider selectionProvider) |
| { |
| control.addFocusListener(new FocusListener() |
| { |
| public void focusLost(FocusEvent e) |
| { |
| unsetGlobalActions(); |
| bars.updateActionBars(); |
| } |
| |
| public void focusGained(FocusEvent e) |
| { |
| updateActions(); |
| setGlobalActions(); |
| bars.updateActionBars(); |
| } |
| |
| private void updateActions() |
| { |
| if (selectionProvider != null) |
| { |
| SelectionChangedEvent selectionEvent = null; |
| |
| for (IAction next : globalActions.values()) |
| { |
| if (next instanceof ISelectionChangedListener) |
| { |
| if (selectionEvent == null) |
| { |
| selectionEvent = new SelectionChangedEvent(selectionProvider, selectionProvider.getSelection()); |
| } |
| |
| ((ISelectionChangedListener)next).selectionChanged(selectionEvent); |
| } |
| } |
| } |
| } |
| }); |
| |
| control.addDisposeListener(new DisposeListener() |
| { |
| public void widgetDisposed(DisposeEvent e) |
| { |
| globalActions.clear(); |
| previousActions.clear(); |
| } |
| }); |
| |
| return this; |
| } |
| |
| protected void setGlobalActions() |
| { |
| previousActions.clear(); |
| |
| for (Map.Entry<String, IAction> next : globalActions.entrySet()) |
| { |
| previousActions.put(next.getKey(), bars.getGlobalActionHandler(next.getKey())); |
| bars.setGlobalActionHandler(next.getKey(), next.getValue()); |
| } |
| } |
| |
| protected void unsetGlobalActions() |
| { |
| for (Map.Entry<String, IAction> next : previousActions.entrySet()) |
| { |
| bars.setGlobalActionHandler(next.getKey(), next.getValue()); |
| } |
| |
| previousActions.clear(); |
| } |
| } |