| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.team.internal.ccvs.ui.model; |
| |
| import org.eclipse.jface.viewers.AbstractTreeViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.team.internal.ccvs.core.ICVSRemoteFolder; |
| import org.eclipse.team.internal.ccvs.core.ICVSRemoteResource; |
| import org.eclipse.team.internal.ccvs.core.ICVSRepositoryLocation; |
| import org.eclipse.team.internal.ccvs.core.ICVSResource; |
| import org.eclipse.team.internal.ccvs.core.resources.RemoteResource; |
| import org.eclipse.team.internal.ccvs.ui.CVSUIPlugin; |
| import org.eclipse.team.internal.ccvs.ui.ICVSUIConstants; |
| import org.eclipse.team.internal.ccvs.ui.repo.RepositoryRoot; |
| import org.eclipse.ui.IWorkingSet; |
| import org.eclipse.ui.model.WorkbenchContentProvider; |
| import org.eclipse.ui.progress.DeferredTreeContentManager; |
| |
| /** |
| * Extension to the generic workbench content provider mechanism |
| * to lazily determine whether an element has children. That is, |
| * children for an element aren't fetched until the user clicks |
| * on the tree expansion box. |
| */ |
| public class RemoteContentProvider extends WorkbenchContentProvider { |
| |
| IWorkingSet workingSet; |
| DeferredTreeContentManager manager; |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) |
| */ |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| if (viewer instanceof AbstractTreeViewer) { |
| if(CVSUIPlugin.getPlugin().getPreferenceStore().getBoolean(ICVSUIConstants.BACKGROUND_REPOVIEW)) { |
| manager = new DeferredTreeContentManager(this, (AbstractTreeViewer) viewer); |
| } |
| } |
| super.inputChanged(viewer, oldInput, newInput); |
| } |
| |
| public boolean hasChildren(Object element) { |
| // the + box will always appear, but then disappear |
| // if not needed after you first click on it. |
| if (element instanceof ICVSRemoteResource) { |
| if (element instanceof ICVSRemoteFolder) { |
| return ((ICVSRemoteFolder) element).isExpandable(); |
| } |
| return ((ICVSRemoteResource) element).isContainer(); |
| } else if (element instanceof CVSResourceElement) { |
| ICVSResource r = ((CVSResourceElement) element).getCVSResource(); |
| if (r instanceof RemoteResource) { |
| return r.isFolder(); |
| } |
| } else if (element instanceof VersionCategory) { |
| return true; |
| } else if (element instanceof BranchCategory) { |
| return true; |
| } else if (element instanceof ModulesCategory) { |
| return true; |
| } else if (element instanceof CVSTagElement) { |
| return true; |
| } else if (element instanceof RemoteModule) { |
| return true; |
| } |
| if (manager != null) { |
| if (manager.isDeferredAdapter(element)) |
| return manager.mayHaveChildren(element); |
| } |
| |
| return super.hasChildren(element); |
| } |
| |
| /** |
| * Sets the workingSet. |
| * @param workingSet The workingSet to set |
| */ |
| public void setWorkingSet(IWorkingSet workingSet) { |
| this.workingSet = workingSet; |
| } |
| |
| /** |
| * Returns the workingSet. |
| * @return IWorkingSet |
| */ |
| public IWorkingSet getWorkingSet() { |
| return workingSet; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.model.WorkbenchContentProvider#getChildren(java.lang.Object) |
| */ |
| public Object[] getChildren(Object element) { |
| if (manager != null) { |
| Object[] children = manager.getChildren(element); |
| if (children != null) { |
| // This will be a placeholder to indicate |
| // that the real children are being fetched |
| return children; |
| } |
| } |
| Object[] children = super.getChildren(element); |
| for (int i = 0; i < children.length; i++) { |
| Object object = children[i]; |
| if (object instanceof CVSModelElement) |
| ((CVSModelElement)object).setWorkingSet(getWorkingSet()); |
| } |
| return children; |
| } |
| |
| public void cancelJobs(RepositoryRoot[] roots) { |
| if (manager != null) { |
| for (int i = 0; i < roots.length; i++) { |
| RepositoryRoot root = roots[i]; |
| cancelJobs(root.getRoot()); |
| } |
| } |
| } |
| |
| /** |
| * Cancel any jobs that are fetching content from the given location. |
| * @param location |
| */ |
| public void cancelJobs(ICVSRepositoryLocation location) { |
| manager.cancel(location); |
| } |
| } |