| /******************************************************************************* |
| * Copyright (c) 2009, 2013 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.callhierarchy; |
| |
| import java.util.Iterator; |
| |
| import org.eclipse.swt.widgets.TreeItem; |
| |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| |
| import org.eclipse.ui.ISharedImages; |
| import org.eclipse.ui.PlatformUI; |
| |
| import org.eclipse.jdt.internal.corext.callhierarchy.MethodWrapper; |
| |
| import org.eclipse.jdt.internal.ui.IJavaHelpContextIds; |
| |
| |
| /** |
| * This action removes a single node from the Call Hierarchy view. |
| * |
| * @since 3.6 |
| */ |
| class RemoveFromViewAction extends Action{ |
| |
| |
| /** |
| * The Call Hierarchy view part. |
| */ |
| private CallHierarchyViewPart fPart; |
| |
| /** |
| * The Call Hierarchy viewer. |
| */ |
| private CallHierarchyViewer fCallHierarchyViewer; |
| |
| /** |
| * Creates the hide single node action. |
| * |
| * @param part the call hierarchy view part |
| * @param viewer the call hierarchy viewer |
| */ |
| public RemoveFromViewAction(CallHierarchyViewPart part, CallHierarchyViewer viewer) { |
| fPart= part; |
| fCallHierarchyViewer= viewer; |
| setText(CallHierarchyMessages.RemoveFromViewAction_removeFromView_text); |
| setDescription(CallHierarchyMessages.RemoveFromViewAction_removeFromView_description); |
| setToolTipText(CallHierarchyMessages.RemoveFromViewAction_removeFromView_tooltip); |
| PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.CALL_HIERARCHY_REMOVE_FROM_VIEW_ACTION); |
| |
| ISharedImages workbenchImages= PlatformUI.getWorkbench().getSharedImages(); |
| setDisabledImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_ELCL_REMOVE_DISABLED)); |
| setImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_ELCL_REMOVE)); |
| setHoverImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_ELCL_REMOVE)); |
| } |
| |
| /** |
| * Removes the selected nodes from the view with out modifying the underlying view input. Thus |
| * on refresh of the view the removed nodes are also brought back to the view. |
| * |
| * @see org.eclipse.jface.action.Action#run() |
| * @since 3.9 |
| */ |
| @Override |
| public void run() { |
| for (TreeItem item : fCallHierarchyViewer.getTree().getSelection()) { |
| item.dispose(); |
| } |
| } |
| |
| /** |
| * Gets the selection from the call hierarchy view part. |
| * |
| * @return the current selection |
| */ |
| private ISelection getSelection() { |
| return fPart.getSelection(); |
| } |
| |
| /** |
| * Checks whether this action can be added for the selected element in the call hierarchy. |
| * |
| * @return <code> true</code> if the action can be added, <code>false</code> otherwise |
| */ |
| protected boolean canActionBeAdded() { |
| IStructuredSelection selection= (IStructuredSelection)getSelection(); |
| if (selection.isEmpty()) |
| return false; |
| |
| Iterator<?> iter= selection.iterator(); |
| while (iter.hasNext()) { |
| Object element= iter.next(); |
| if (!(element instanceof MethodWrapper))//takes care of '...' node |
| return false; |
| } |
| |
| for (TreeItem item : fCallHierarchyViewer.getTree().getSelection()) { |
| if (!checkForChildren(item)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Checks whether the children are being fetched for a node recursively. |
| * |
| * @param item the parent node |
| * @return <code>false</code> when children are currently being fetched for a node, |
| * <code>true</code> otherwise |
| */ |
| private boolean checkForChildren(TreeItem item) { |
| TreeItem[] children= item.getItems(); |
| if (children.length == 1) { |
| Object data= children[0].getData(); |
| if (!(data instanceof MethodWrapper) && data != null) |
| return false; // Do not add action if children are still being fetched for that node or if it's only JFace's dummy node. |
| } |
| for (TreeItem child : children) { |
| if (!checkForChildren(child)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| } |