| /****************************************************************************** |
| * 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.examples.runtime.emf.clipboard.actions; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.emf.ecore.resource.Resource; |
| import org.eclipse.emf.examples.extlibrary.presentation.EXTLibraryEditor; |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.swt.dnd.Clipboard; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.ui.IEditorActionDelegate; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.actions.ActionDelegate; |
| |
| |
| /** |
| * Abstract action delegate for copy/paste actions; provides common behaviours |
| * for managing the selection, etc. |
| */ |
| abstract class AbstractClipboardDelegate |
| extends ActionDelegate |
| implements IEditorActionDelegate { |
| |
| /** |
| * The shell this action is hosted in. |
| */ |
| private Shell shell = null; |
| |
| /** |
| * The active editor |
| */ |
| private EXTLibraryEditor editor = null; |
| |
| /** |
| * Selected {@link EObject}s. |
| */ |
| private Collection selectedEObjects = Collections.EMPTY_SET; |
| |
| /** |
| * Selected {@link Resource}s |
| */ |
| private Collection selectedResources = Collections.EMPTY_SET; |
| |
| /** |
| * Initializes me. |
| */ |
| protected AbstractClipboardDelegate() { |
| super(); |
| } |
| |
| /** |
| * Retrieves the user's selection. |
| * |
| * @return a collection of selected {@link EObject}s |
| */ |
| protected Collection getSelectedObjects() { |
| return selectedEObjects; |
| } |
| |
| /** |
| * Retrieves the user's selected resources. |
| * |
| * @return a collection of selected {@link Resouce}s |
| */ |
| protected Collection getSelectedResources() { |
| return selectedResources; |
| } |
| |
| /** |
| * Obtains the shell to use for opening dialogs. |
| * |
| * @return my shell |
| */ |
| protected Shell getShell() { |
| return shell; |
| } |
| |
| /** |
| * Selects the specified <code>objects</code> in the current editor. |
| * |
| * @param objects the objects to select (may be empty) |
| */ |
| protected void selectInEditor(Collection objects) { |
| editor.setSelectionToViewer(objects); |
| } |
| |
| /** |
| * Accesses the current editor. |
| * |
| * @return the current editor |
| */ |
| protected EXTLibraryEditor getEditor() { |
| return editor; |
| } |
| |
| /** |
| * Template method that delegates to subclasses to run with a clipboard. |
| */ |
| public final void run(IAction action) { |
| Clipboard clipboard = null; |
| |
| try { |
| clipboard = new Clipboard(getShell().getDisplay()); |
| |
| doRun(clipboard); |
| } finally { |
| if (clipboard != null) { |
| // must clean up the clipboard that we created |
| clipboard.dispose(); |
| } |
| } |
| } |
| |
| /** |
| * Implemented by sublasses to do their copy or paste to or from the |
| * specified clipboard. |
| * |
| * @param clipboard the clipboard. Must not be disposed by the receiver |
| */ |
| protected abstract void doRun(Clipboard clipboard); |
| |
| /** |
| * Gets all of the {@link EObject}s in the current selection, if any. |
| */ |
| public void selectionChanged(IAction action, final ISelection selection) { |
| selectedEObjects = Collections.EMPTY_SET; |
| selectedResources = Collections.EMPTY_SET; |
| |
| if (selection instanceof IStructuredSelection) { |
| IStructuredSelection structuredSelection = (IStructuredSelection) selection; |
| selectedEObjects = new java.util.ArrayList(); |
| selectedResources = new java.util.ArrayList(); |
| |
| for (Iterator iter = structuredSelection.iterator(); iter.hasNext();) { |
| Object next = iter.next(); |
| |
| if (next instanceof EObject) { |
| selectedEObjects.add(next); |
| } else if (next instanceof Resource) { |
| selectedResources.add(next); |
| } |
| } |
| } |
| |
| action.setEnabled(!selectedEObjects.isEmpty()); |
| } |
| |
| /** |
| * Get the active library editor and its host shell. |
| */ |
| public void setActiveEditor(IAction action, IEditorPart targetEditor) { |
| editor = (EXTLibraryEditor) targetEditor; |
| |
| if (targetEditor != null) { |
| this.shell = targetEditor.getSite().getShell(); |
| } |
| } |
| } |