| /******************************************************************************* |
| * Copyright (c) 2000, 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.views.variables; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.debug.core.model.IVariable; |
| import org.eclipse.debug.internal.ui.elements.adapters.DeferredVariableLogicalStructure; |
| import org.eclipse.debug.internal.ui.views.RemoteTreeContentManager; |
| import org.eclipse.debug.internal.ui.views.RemoteTreeViewer; |
| import org.eclipse.jface.viewers.ITreeContentProvider; |
| import org.eclipse.ui.IWorkbenchPartSite; |
| import org.eclipse.ui.internal.progress.PendingUpdateAdapter; |
| import org.eclipse.ui.progress.IDeferredWorkbenchAdapter; |
| import org.eclipse.ui.progress.IElementCollector; |
| |
| /** |
| * Remote content manager for variables. Creates an appropriate adapter for |
| * logical structures. |
| */ |
| public class RemoteVariableContentManager extends RemoteTreeContentManager { |
| |
| protected VariablesView fView; |
| private IDeferredWorkbenchAdapter fVariableLogicalStructureAdapter = new DeferredVariableLogicalStructure(); |
| |
| private Set fHasChildren = new HashSet(); |
| private Set fNoChildren = new HashSet(); |
| |
| /** |
| * Special collector to also collect accurate "has children" information. |
| */ |
| public class VariableCollector extends RemoteTreeContentManager.Collector { |
| |
| public VariableCollector(Object parent) { |
| super(parent); |
| } |
| |
| /** |
| * Notification the given element has children |
| * |
| * @param element |
| */ |
| public void setHasChildren(Object element, boolean children) { |
| synchronized (fHasChildren) { |
| if (children) { |
| fHasChildren.add(element); |
| fNoChildren.remove(element); |
| } else { |
| fNoChildren.add(element); |
| fHasChildren.remove(element); |
| } |
| } |
| } |
| |
| } |
| |
| /** |
| * Constructs a remote content manager for a variables view. |
| */ |
| public RemoteVariableContentManager(ITreeContentProvider provider, RemoteTreeViewer viewer, IWorkbenchPartSite site, VariablesView view) { |
| super(provider, viewer, site); |
| fView = view; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.progress.DeferredTreeContentManager#getAdapter(java.lang.Object) |
| */ |
| protected IDeferredWorkbenchAdapter getAdapter(Object element) { |
| if (element instanceof IVariable && fView !=null && fView.isShowLogicalStructure()) { |
| return fVariableLogicalStructureAdapter; |
| } |
| return super.getAdapter(element); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.progress.DeferredTreeContentManager#createElementCollector(java.lang.Object, org.eclipse.ui.internal.progress.PendingUpdateAdapter) |
| */ |
| protected IElementCollector createElementCollector(Object parent, PendingUpdateAdapter placeholder) { |
| return new VariableCollector(parent); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.progress.DeferredTreeContentManager#mayHaveChildren(java.lang.Object) |
| */ |
| public boolean mayHaveChildren(Object element) { |
| synchronized (fHasChildren) { |
| if (fHasChildren.contains(element)) { |
| return true; |
| } else if (fNoChildren.contains(element)) { |
| return false; |
| } |
| } |
| return super.mayHaveChildren(element); |
| } |
| |
| /** |
| * Called to clear the "has children" state cache when the view input changes. |
| */ |
| public void clearHasChildrenCache() { |
| synchronized (fHasChildren) { |
| fHasChildren.clear(); |
| fNoChildren.clear(); |
| } |
| } |
| } |