| /******************************************************************************* |
| * 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.debug.internal.ui.viewers.update; |
| |
| import org.eclipse.debug.core.model.IDebugElement; |
| import org.eclipse.debug.core.model.IStackFrame; |
| import org.eclipse.debug.internal.ui.viewers.provisional.IModelSelectionPolicy; |
| import org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext; |
| import org.eclipse.debug.ui.IDebugUIConstants; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.ui.IWorkbenchPart; |
| |
| /** |
| * Default selection policy for the debug view. |
| * |
| * @since 3.2 |
| */ |
| public class DefaultSelectionPolicy implements IModelSelectionPolicy { |
| |
| private IDebugElement fDebugElement; |
| |
| /** |
| * Constructs a new selection policy for the given debug |
| * element. |
| * |
| * @param element |
| */ |
| public DefaultSelectionPolicy(IDebugElement element) { |
| fDebugElement = element; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.ui.viewers.IModelSelectionPolicy#contains(org.eclipse.jface.viewers.ISelection, org.eclipse.debug.ui.viewers.IPresentationContext) |
| */ |
| public boolean contains(ISelection selection, IPresentationContext context) { |
| IWorkbenchPart part = context.getPart(); |
| if (part != null) { |
| if (IDebugUIConstants.ID_DEBUG_VIEW.equals(part.getSite().getId())) { |
| if (selection instanceof IStructuredSelection) { |
| IStructuredSelection ss = (IStructuredSelection) selection; |
| Object element = ss.getFirstElement(); |
| if (element instanceof IDebugElement) { |
| IDebugElement debugElement = (IDebugElement) element; |
| return fDebugElement.getDebugTarget().equals(debugElement.getDebugTarget()); |
| } |
| } |
| } |
| } |
| return false; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.ui.viewers.IModelSelectionPolicy#overrides(org.eclipse.jface.viewers.ISelection, org.eclipse.jface.viewers.ISelection, org.eclipse.debug.ui.viewers.IPresentationContext) |
| */ |
| public boolean overrides(ISelection existing, ISelection candidate, IPresentationContext context) { |
| IWorkbenchPart part = context.getPart(); |
| if (part != null) { |
| if (IDebugUIConstants.ID_DEBUG_VIEW.equals(part.getSite().getId())) { |
| if (existing instanceof IStructuredSelection && candidate instanceof IStructuredSelection) { |
| IStructuredSelection ssExisting = (IStructuredSelection) existing; |
| IStructuredSelection ssCandidate = (IStructuredSelection) candidate; |
| return overrides(ssExisting.getFirstElement(), ssCandidate.getFirstElement()); |
| } |
| } |
| } |
| return true; |
| } |
| |
| protected boolean overrides(Object existing, Object candidate) { |
| if (existing == null) { |
| return true; |
| } |
| if (existing.equals(candidate)) { |
| return true; |
| } |
| if (existing instanceof IStackFrame && candidate instanceof IStackFrame) { |
| IStackFrame curr = (IStackFrame) existing; |
| IStackFrame next = (IStackFrame) candidate; |
| return curr.getThread().equals(next.getThread()) || !isSticky(existing); |
| } |
| return !isSticky(existing); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.ui.viewers.IModelSelectionPolicy#isSticky(org.eclipse.jface.viewers.ISelection, org.eclipse.debug.ui.viewers.IPresentationContext) |
| */ |
| public boolean isSticky(ISelection selection, IPresentationContext context) { |
| IWorkbenchPart part = context.getPart(); |
| if (part != null) { |
| if (IDebugUIConstants.ID_DEBUG_VIEW.equals(part.getSite().getId())) { |
| if (selection instanceof IStructuredSelection) { |
| return isSticky(((IStructuredSelection)selection).getFirstElement()); |
| } |
| } |
| } |
| return false; |
| } |
| |
| protected boolean isSticky(Object element) { |
| if (element instanceof IStackFrame) { |
| IStackFrame frame = (IStackFrame) element; |
| return frame.isSuspended(); |
| } |
| return false; |
| } |
| |
| } |