| /******************************************************************************* |
| * Copyright (c) 2000, 2004 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.team.examples.pessimistic; |
| |
| import java.util.*; |
| |
| import org.eclipse.core.resources.*; |
| import org.eclipse.core.runtime.*; |
| import org.eclipse.jface.window.Window; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.team.core.RepositoryProvider; |
| import org.eclipse.ui.*; |
| import org.eclipse.ui.dialogs.CheckedTreeSelectionDialog; |
| import org.eclipse.ui.model.WorkbenchLabelProvider; |
| import org.eclipse.ui.views.navigator.ResourceSorter; |
| |
| /** |
| * The <code>ResourceChangeListener</code> listens for resource changes |
| * and (optionally) prompts the user to add the new resources to the |
| * control of the repository provider. |
| */ |
| public class ResourceChangeListener implements IResourceDeltaVisitor, IResourceChangeListener { |
| /* |
| * Set of added resources |
| */ |
| private Set fAdded; |
| /* |
| * Set of removed resources |
| */ |
| private Set fRemoved; |
| |
| public ResourceChangeListener() { |
| fAdded= new HashSet(1); |
| fRemoved= new HashSet(1); |
| } |
| |
| /** |
| * Looks for the following changes: |
| * <ul> |
| * <li>Resources that are controlled and are removed</li> |
| * <li>Resources that are added under a managed project</li> |
| * </ul> |
| * @see org.eclipse.core.resources.IResourceDeltaVisitor#visit(IResourceDelta) |
| */ |
| public boolean visit(IResourceDelta delta) throws CoreException { |
| IResource resource= delta.getResource(); |
| if (resource != null) { |
| IProject project= resource.getProject(); |
| if (project != null) { |
| PessimisticFilesystemProvider provider= (PessimisticFilesystemProvider)RepositoryProvider.getProvider(project, PessimisticFilesystemProviderPlugin.NATURE_ID); |
| if (provider == null) |
| return false; |
| if (provider.isControlled(resource)) { |
| switch (delta.getKind()) { |
| case IResourceDelta.CHANGED: |
| case IResourceDelta.ADDED: |
| return true; |
| case IResourceDelta.REMOVED: |
| fRemoved.add(resource); |
| return false; |
| } |
| } else { |
| switch (delta.getKind()) { |
| case IResourceDelta.CHANGED: |
| case IResourceDelta.REMOVED: |
| return true; |
| case IResourceDelta.ADDED: |
| // don't prompt for ignored resources |
| if (!provider.isIgnored(resource)) { |
| fAdded.add(resource); |
| } |
| return true; |
| } |
| } |
| } else { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /* |
| * Convenience method to return a resource array from a collection |
| */ |
| private IResource[] toResourceArray(Collection collection) { |
| if (collection.isEmpty()) { |
| return new IResource[0]; |
| } |
| IResource[] resources= new IResource[collection.size()]; |
| collection.toArray(resources); |
| return resources; |
| } |
| |
| /** |
| * @see IResourceChangeListener#resourceChanged(IResourceChangeEvent) |
| */ |
| public void resourceChanged (IResourceChangeEvent event) { |
| try { |
| event.getDelta().accept(this); |
| } catch (CoreException e) { |
| e.printStackTrace(); |
| PessimisticFilesystemProviderPlugin.getInstance().logError(e, "Exceptions during resource callback"); |
| } |
| |
| if (!fRemoved.isEmpty() || !fAdded.isEmpty()) { |
| final IWorkspaceRunnable workspaceRunnable= new IWorkspaceRunnable() { |
| public void run(final IProgressMonitor monitor) throws CoreException { |
| if (!fRemoved.isEmpty()) { |
| remove(monitor); |
| } |
| |
| if (!fAdded.isEmpty()) { |
| add(monitor); |
| } |
| } |
| }; |
| // must fork since we are in resource callback. |
| Runnable run= new Runnable() { |
| public void run() { |
| try { |
| IWorkspace workspace= ResourcesPlugin.getWorkspace(); |
| if (workspace != null) { |
| workspace.run(workspaceRunnable, null); |
| } |
| } catch (CoreException e) { |
| PessimisticFilesystemProviderPlugin.getInstance().logError(e, "Problems encountered during attempt to add/remove control."); |
| } |
| } |
| }; |
| new Thread(run).start(); |
| } |
| } |
| |
| /* |
| * Convenience method to get the preference for what to do |
| * when new resource have been detected. |
| */ |
| private int getAddToControlPreference() { |
| Preferences preferences= PessimisticFilesystemProviderPlugin.getInstance().getPluginPreferences(); |
| return preferences.getInt(IPessimisticFilesystemConstants.PREF_ADD_TO_CONTROL); |
| } |
| |
| /* |
| * Adds the resources to the control of the provider. |
| * If the add to control preference is: |
| * do nothing - does not add |
| * automatic - adds all resources |
| * prompt - brings up a prompt which requests that the user |
| * select which resources to add |
| */ |
| private void add(final IProgressMonitor monitor) { |
| switch (getAddToControlPreference()) { |
| case IPessimisticFilesystemConstants.OPTION_DO_NOTHING: |
| break; |
| case IPessimisticFilesystemConstants.OPTION_AUTOMATIC: |
| addToControl(fAdded, monitor); |
| break; |
| case IPessimisticFilesystemConstants.OPTION_PROMPT: |
| final Shell shell= getShell(); |
| if (shell != null && !shell.isDisposed()) { |
| final Set resources= new HashSet(fAdded); |
| Runnable run= new Runnable() { |
| public void run() { |
| CheckedTreeSelectionDialog dialog= new CheckedTreeSelectionDialog(shell, new WorkbenchLabelProvider(), new ResourceSetContentProvider(resources)); |
| dialog.setMessage("Select the resources to be added to the control of the repository."); |
| dialog.setTitle("Add resources to control"); |
| dialog.setContainerMode(true); |
| dialog.setBlockOnOpen(true); |
| dialog.setSorter(new ResourceSorter(ResourceSorter.NAME)); |
| Object[] resourceArray= resources.toArray(); |
| dialog.setExpandedElements(resourceArray); |
| dialog.setInitialSelections(resourceArray); |
| dialog.setInput(ResourcesPlugin.getWorkspace().getRoot()); |
| int status= dialog.open(); |
| |
| if (status == Window.OK) { |
| Object[] results= dialog.getResult(); |
| if (results != null) { |
| Set resources= new HashSet(results.length); |
| for (int i= 0; i < results.length; i++) { |
| resources.add(results[i]); |
| } |
| addToControl(resources, monitor); |
| } |
| } |
| } |
| }; |
| |
| Display display= shell.getDisplay(); |
| display.asyncExec(run); |
| } else { |
| PessimisticFilesystemProviderPlugin.getInstance().logError(null, "Could not aquire a shell"); |
| } |
| break; |
| } |
| fAdded.clear(); |
| } |
| |
| /* |
| * Adds the resources to the control of the provider. |
| */ |
| private void addToControl(Collection resources, final IProgressMonitor monitor) { |
| Map byProject= sortByProject(resources); |
| for (Iterator i= byProject.keySet().iterator(); i.hasNext();) { |
| IProject project= (IProject) i.next(); |
| PessimisticFilesystemProvider provider= (PessimisticFilesystemProvider)RepositoryProvider.getProvider(project, PessimisticFilesystemProviderPlugin.NATURE_ID); |
| if (provider != null) { |
| provider.addToControl(toResourceArray((Collection)byProject.get(project)), monitor); |
| } |
| |
| } |
| } |
| |
| /* |
| * Removes the resources from the control of the provider. |
| */ |
| private void remove(IProgressMonitor monitor) { |
| Map byProject= sortByProject(fRemoved); |
| for (Iterator i= byProject.keySet().iterator(); i.hasNext();) { |
| IProject project= (IProject) i.next(); |
| PessimisticFilesystemProvider provider= (PessimisticFilesystemProvider)RepositoryProvider.getProvider(project, PessimisticFilesystemProviderPlugin.NATURE_ID); |
| if (provider != null) { |
| provider.removeFromControl(toResourceArray((Collection)byProject.get(project)), monitor); |
| } |
| } |
| fRemoved.clear(); |
| } |
| |
| /* |
| * Convenience method to sort the resources by project |
| */ |
| private Map sortByProject(Collection resources) { |
| Map byProject= new HashMap(); |
| for (Iterator i= resources.iterator(); i.hasNext();) { |
| IResource resource= (IResource) i.next(); |
| IProject project= resource.getProject(); |
| Set set= (Set)byProject.get(project); |
| if (set == null) { |
| set= new HashSet(1); |
| byProject.put(project, set); |
| } |
| set.add(resource); |
| } |
| return byProject; |
| } |
| |
| /* |
| * Convenience method which answers a shell with which to prompt. |
| */ |
| private Shell getShell() { |
| IWorkbench workbench= PlatformUI.getWorkbench(); |
| if (workbench != null) { |
| IWorkbenchWindow window= workbench.getActiveWorkbenchWindow(); |
| if (window == null) { |
| IWorkbenchWindow[] windows= workbench.getWorkbenchWindows(); |
| if (windows != null && windows.length > 0) { |
| window= windows[0]; |
| } |
| } |
| if (window != null) { |
| Shell shell= window.getShell(); |
| if (shell == null) |
| return null; |
| if (shell.isDisposed()) |
| return null; |
| return shell; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Starts listening for changes. |
| */ |
| public void startup() { |
| ResourcesPlugin.getWorkspace().addResourceChangeListener(this, IResourceChangeEvent.POST_CHANGE); |
| if (PessimisticFilesystemProviderPlugin.getInstance().isDebugging()) |
| System.out.println ("Resource callback registered"); |
| } |
| |
| /** |
| * Stops listening for changes. |
| */ |
| public void shutdown() { |
| ResourcesPlugin.getWorkspace().removeResourceChangeListener(this); |
| if (PessimisticFilesystemProviderPlugin.getInstance().isDebugging()) |
| System.out.println ("Resource callback unregistered"); |
| } |
| } |