| /******************************************************************************* |
| * Copyright (c) 2005, 2007 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 |
| * Bjorn Freeman-Benson - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.debug.examples.ui.pda.views; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.debug.core.DebugException; |
| import org.eclipse.debug.core.model.IValue; |
| import org.eclipse.debug.examples.core.pda.model.PDADebugTarget; |
| import org.eclipse.debug.examples.ui.pda.DebugUIPlugin; |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.resource.ImageRegistry; |
| import org.eclipse.jface.viewers.ISelectionChangedListener; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.SelectionChangedEvent; |
| import org.eclipse.jface.viewers.TreeViewer; |
| |
| |
| /** |
| * Pops a selected value off the data stack. The selection does <b>not</b> have to be |
| * the top element on the stack. |
| */ |
| public class PopAction extends Action implements ISelectionChangedListener { |
| |
| private DataStackView fView; |
| |
| /** |
| * Constructs an action to pop values off the stack |
| */ |
| protected PopAction(DataStackView view) { |
| super("Pop"); |
| ImageRegistry imageRegistry = DebugUIPlugin.getDefault().getImageRegistry(); |
| setImageDescriptor(imageRegistry.getDescriptor(DebugUIPlugin.IMG_ELCL_POP)); |
| setDisabledImageDescriptor(imageRegistry.getDescriptor(DebugUIPlugin.IMG_DLCL_POP)); |
| setToolTipText("Pop"); |
| setEnabled(false); |
| view.getSite().getSelectionProvider().addSelectionChangedListener(this); |
| fView = view; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent) |
| */ |
| public void selectionChanged(SelectionChangedEvent event) { |
| if (event.getSelection().isEmpty()) { |
| setEnabled(false); |
| } else { |
| setEnabled(getDebugTarget().canPop()); |
| } |
| } |
| |
| public void run() { |
| TreeViewer viewer = (TreeViewer)fView.getViewer(); |
| IStructuredSelection selection = (IStructuredSelection)viewer.getSelection(); |
| Object popee = selection.getFirstElement(); |
| try { |
| PDADebugTarget target = getDebugTarget(); |
| IValue[] stack = target.getDataStack(); |
| List restore = new ArrayList(); |
| for (int i = 0; i < stack.length; i++) { |
| Object value = stack[i]; |
| if (popee.equals(value)) { |
| // pop & stop |
| target.pop(); |
| break; |
| } else { |
| // remember value to push back on |
| restore.add(target.pop()); |
| } |
| } |
| while (!restore.isEmpty()) { |
| IValue value = (IValue) restore.remove(restore.size() - 1); |
| target.push(value.getValueString()); |
| } |
| } catch (DebugException e) { |
| } |
| viewer.refresh(); |
| } |
| |
| /** |
| * Returns the debug target assocaited with the data view. |
| * |
| * @return the debug target assocaited with the data view |
| */ |
| protected PDADebugTarget getDebugTarget() { |
| TreeViewer viewer = (TreeViewer)fView.getViewer(); |
| return (PDADebugTarget) viewer.getInput(); |
| } |
| } |