Add a top-level node in the Files view to display the SDK libraries.

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/filesview/FilesView.java

 /*
  * Copyright (c) 2012, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
@@ skipping 59 matching lines @@
 import org.eclipse.ui.part.ResourceTransfer;
 import org.eclipse.ui.part.ViewPart;
 import org.eclipse.ui.views.navigator.LocalSelectionTransfer;
 
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 
 /**
  * File-oriented view for navigating Dart projects.
- * <p>
- * This view will replace the current "Libraries" view once a few tasks are completed:
- * <p>
- * TODO Remove the deprecated CreateFileAction and CreateFolderActions with new Dart Editor specific
- * versions
- * <p>
- * TODO modify the builder to ensure that the correct libraries are built when the user makes
- * changes to Dart code
- * <p>
- * TODO re-visit the DeltaProcessor and ensure that all user actions result in a correct update of
- * the model in the viewer
  */
 @SuppressWarnings("deprecation")
 public class FilesView extends ViewPart implements ISetSelectionTarget {
 
   private class FontPropertyChangeListener implements IPropertyChangeListener {
     @Override
     public void propertyChange(PropertyChangeEvent event) {
       if (treeViewer != null) {
         if (DartBasePreferencePage.BASE_FONT_KEY.equals(event.getProperty())) {
           updateTreeFont();
@@ skipping 50 matching lines @@
   private static final String TAG_PATH = "path"; //$NON-NLS-1$
   private static final String TAG_SELECTION = "selection"; //$NON-NLS-1$
 
   public FilesView() {
   }
 
   @Override
   public void createPartControl(Composite parent) {
     treeViewer = new TreeViewer(parent);
     treeViewer.setContentProvider(new ResourceContentProvider());
-    //TODO (pquitslund): replace with WorkbenchLabelProvider.getDecoratingWorkbenchLabelProvider() 
-    // when we have the linked resource story straightened out
-//    treeViewer.setLabelProvider(WorkbenchLabelProvider.getDecoratingWorkbenchLabelProvider());
+    // TODO(pquitslund): replace with WorkbenchLabelProvider.getDecoratingWorkbenchLabelProvider()
+    //treeViewer.setLabelProvider(WorkbenchLabelProvider.getDecoratingWorkbenchLabelProvider());
     treeViewer.setLabelProvider(new DecoratingLabelProvider(new WorkbenchLabelProvider(),
         new ProblemsLabelDecorator()));
     treeViewer.setComparator(new FilesViewerComparator());
     treeViewer.addDoubleClickListener(new IDoubleClickListener() {
       @Override
       public void doubleClick(DoubleClickEvent event) {
         handleDoubleClick(event);
       }
     });
     treeViewer.setInput(ResourcesPlugin.getWorkspace().getRoot());
@@ skipping 81 matching lines @@
     Object elements[] = ((IStructuredSelection) treeViewer.getSelection()).toArray();
     if (elements.length > 0) {
       IMemento selectionMem = memento.createChild(TAG_SELECTION);
       for (Object element : elements) {
         if (element instanceof IResource) {
           IMemento elementMem = selectionMem.createChild(TAG_ELEMENT);
           elementMem.putString(TAG_PATH, ((IResource) element).getFullPath().toString());
         }
       }
     }
-
   }
 
   @Override
   public void selectReveal(ISelection selection) {
     treeViewer.setSelection(selection, true);
   }
 
   @Override
   public void setFocus() {
     treeViewer.getTree().setFocus();
   }
 
   protected void createContextMenu() {
     MenuManager menuMgr = new MenuManager("#PopupMenu"); //$NON-NLS-1$
     menuMgr.setRemoveAllWhenShown(true);
     menuMgr.addMenuListener(new IMenuListener() {
       @Override
       public void menuAboutToShow(IMenuManager manager) {
         fillContextMenu(manager);
       }
     });
     Menu menu = menuMgr.createContextMenu(treeViewer.getTree());
     treeViewer.getTree().setMenu(menu);
     getSite().registerContextMenu(menuMgr, treeViewer);
   }
 
   protected void fillContextMenu(IMenuManager manager) {
+    IStructuredSelection selection = (IStructuredSelection) treeViewer.getSelection();
 
     // New File/ New Folder 
 
-    manager.add(createFileAction);
-    manager.add(createFolderAction);
+    if (allElementsAreResources(selection)) {
+      manager.add(createFileAction);
+      manager.add(createFolderAction);
+    }
 
     // OPEN GROUP
 
-    manager.add(new Separator());
+    if (manager.getItems().length > 0) {
+      manager.add(new Separator());
+    }
+
     manager.add(OpenFolderHandler.createCommandAction(getSite().getWorkbenchWindow()));
 
-    IStructuredSelection selection = (IStructuredSelection) treeViewer.getSelection();
-
     // REFACTOR GROUP
 
     // Refactor iff all elements are IResources
 
     if (!selection.isEmpty() && allElementsAreResources(selection)) {
       manager.add(new Separator());
       if (selection.size() == 1) {
         manager.add(renameAction);
         manager.add(moveAction);
       }
       manager.add(deleteAction);
     }
 
     // Remove, iff non-empty selection, all elements are IResources
 
     if (!selection.isEmpty() && allElementsAreResources(selection)) {
 
       // Copy File Path iff single element and is an IResource
 
       if (selection.size() == 1) {
         manager.add(new Separator());
         manager.add(copyFilePathAction);
       }
 
       manager.add(new Separator());
       if (allElementsAreProjects(selection)) {
         manager.add(hideContainerAction);
       }
     }
-
   }
 
   protected void fillInToolbar(IToolBarManager toolbar) {
-
     // Link with Editor
 
     linkWithEditorAction = new LinkWithEditorAction(getViewSite().getPage(), treeViewer);
 
     if (memento != null && memento.getBoolean(LINK_WITH_EDITOR_ID) != null) {
       linkWithEditorAction.setLinkWithEditor(memento.getBoolean(LINK_WITH_EDITOR_ID).booleanValue());
     } else {
       linkWithEditorAction.setLinkWithEditor(true);
     }
 
@@ skipping 81 matching lines @@
     Transfer[] transfers = new Transfer[] {
         LocalSelectionTransfer.getInstance(), ResourceTransfer.getInstance(),
         FileTransfer.getInstance(), PluginTransfer.getInstance()};
     treeViewer.addDragSupport(ops, transfers, new FilesViewDragAdapter(treeViewer));
     FilesViewDropAdapter adapter = new FilesViewDropAdapter(treeViewer);
     adapter.setFeedbackEnabled(true);
     treeViewer.addDropSupport(ops | DND.DROP_DEFAULT, transfers, adapter);
   }
 
 }