Case Study: adding data and statistics

[ifi-stolz-refaktor.git] / case-study / jdt-after / ui / org / eclipse / jdt / internal / ui / util / SelectionUtil.java

diff --git a/case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/util/SelectionUtil.java b/case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/util/SelectionUtil.java
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+/*******************************************************************************
+ * 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.jdt.internal.ui.util;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+
+import org.eclipse.core.resources.IResource;
+
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.jface.viewers.StructuredSelection;
+
+import org.eclipse.ui.IWorkbenchPage;
+import org.eclipse.ui.IWorkbenchPart;
+import org.eclipse.ui.IWorkbenchPartReference;
+import org.eclipse.ui.IWorkbenchWindow;
+import org.eclipse.ui.part.ISetSelectionTarget;
+
+public class SelectionUtil {
+
+       public static List<?> toList(ISelection selection) {
+               if (selection instanceof IStructuredSelection)
+                       return ((IStructuredSelection) selection).toList();
+               return null;
+       }
+
+       /**
+        * Returns the selected element if the selection consists of a single
+        * element only.
+        *
+        * @param s the selection
+        * @return the selected first element or null
+        */
+       public static Object getSingleElement(ISelection s) {
+               if (! (s instanceof IStructuredSelection))
+                       return null;
+               IStructuredSelection selection= (IStructuredSelection) s;
+               if (selection.size() != 1)
+                       return null;
+
+               return selection.getFirstElement();
+       }
+
+
+       /**
+        * Attempts to select and reveal the specified resources in all parts within
+        * the supplied workbench window's active page.
+        * <p>
+        * Checks all parts in the active page to see if they implement
+        * <code>ISetSelectionTarget</code>, either directly or as an adapter. If
+        * so, tells the part to select and reveal the specified resources.
+        * </p>
+        *
+        * @param resources the resources to be selected and revealed
+        * @param window the workbench window to select and reveal the resource
+        *
+        * @see ISetSelectionTarget
+        *
+        * @see org.eclipse.ui.wizards.newresource.BasicNewResourceWizard#selectAndReveal(IResource,
+        *      IWorkbenchWindow)
+        */
+       public static void selectAndReveal(IResource[] resources, IWorkbenchWindow window) {
+               // validate the input
+               if (window == null || resources == null || Arrays.asList(resources).contains(null)) {
+                       return;
+               }
+               IWorkbenchPage page= window.getActivePage();
+               if (page == null) {
+                       return;
+               }
+
+               // get all the view and editor parts
+               List<IWorkbenchPart> parts= new ArrayList<IWorkbenchPart>();
+               IWorkbenchPartReference refs[]= page.getViewReferences();
+               for (int i= 0; i < refs.length; i++) {
+                       IWorkbenchPart part= refs[i].getPart(false);
+                       if (part != null) {
+                               parts.add(part);
+                       }
+               }
+               refs= page.getEditorReferences();
+               for (int i= 0; i < refs.length; i++) {
+                       if (refs[i].getPart(false) != null) {
+                               parts.add(refs[i].getPart(false));
+                       }
+               }
+
+               final ISelection selection= new StructuredSelection(resources);
+               Iterator<IWorkbenchPart> itr= parts.iterator();
+               while (itr.hasNext()) {
+                       IWorkbenchPart part= itr.next();
+
+                       // get the part's ISetSelectionTarget implementation
+                       ISetSelectionTarget target= null;
+                       if (part instanceof ISetSelectionTarget) {
+                               target= (ISetSelectionTarget) part;
+                       } else {
+                               target= (ISetSelectionTarget) part.getAdapter(ISetSelectionTarget.class);
+                       }
+
+                       if (target != null) {
+                               // select and reveal resource
+                               final ISetSelectionTarget finalTarget= target;
+                               window.getShell().getDisplay().asyncExec(new Runnable() {
+                                       public void run() {
+                                               finalTarget.selectReveal(selection);
+                                       }
+                               });
+                       }
+               }
+       }
+
+}