| /******************************************************************************* |
| * Copyright (c) 2004, 2010 Tasktop Technologies 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: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.resources.ui; |
| |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.eclipse.core.resources.IContainer; |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.core.resources.IFolder; |
| import org.eclipse.core.resources.IProject; |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.resources.IResourceChangeEvent; |
| import org.eclipse.core.resources.IResourceChangeListener; |
| import org.eclipse.core.resources.IResourceDelta; |
| import org.eclipse.core.resources.IResourceDeltaVisitor; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.mylyn.commons.core.StatusHandler; |
| import org.eclipse.mylyn.context.core.ContextCore; |
| import org.eclipse.mylyn.monitor.core.InteractionEvent; |
| import org.eclipse.mylyn.resources.ui.ResourcesUi; |
| |
| /** |
| * @author Mik Kersten |
| */ |
| public class ResourceChangeMonitor implements IResourceChangeListener { |
| |
| private static final int MAX_FILE_DELTA_SIZE = 10; |
| |
| private static final int MAX_NEW_FOLDER_DELTA_SIZE = 3; |
| |
| private class ResourceDeltaVisitor implements IResourceDeltaVisitor { |
| |
| private final Set<IResource> addedResources; |
| |
| private final Set<IResource> changedResources; |
| |
| private boolean haveTeamPrivateMember; |
| |
| private final List<IResourceExclusionStrategy> resourceExclusions; |
| |
| private int numNonExcludedFiles = 0; |
| |
| private int numAddedFolders = 0; |
| |
| public ResourceDeltaVisitor(List<IResourceExclusionStrategy> resourceExclusions) { |
| this.resourceExclusions = resourceExclusions; |
| this.addedResources = new HashSet<IResource>(); |
| this.changedResources = new HashSet<IResource>(); |
| |
| // make sure that the exclusions are updated |
| for (IResourceExclusionStrategy exclusion : exclusions) { |
| exclusion.update(); |
| } |
| } |
| |
| public boolean hasValidResult() { |
| return !haveTeamPrivateMember; |
| } |
| |
| public boolean visit(IResourceDelta delta) { |
| |
| IResource deltaResource = delta.getResource(); |
| if (deltaResource instanceof IProject |
| && (delta.getKind() == IResourceDelta.REMOVED || (delta.getFlags() & IResourceDelta.OPEN) != 0)) { |
| // the project was either opened, closed or deleted, so lets ignore this so that we don't add every file to the context |
| return false; |
| } |
| |
| if (hasTeamPrivate(deltaResource)) { |
| return false; |
| } |
| |
| if (isExcluded(deltaResource)) { |
| return false; |
| } |
| |
| IResourceDelta[] added = delta.getAffectedChildren(IResourceDelta.ADDED); |
| for (IResourceDelta element : added) { |
| IResource resource = element.getResource(); |
| if ((resource instanceof IFile || resource instanceof IFolder) && !isExcluded(resource)) { |
| |
| if (hasTeamPrivate(resource)) { |
| return false; |
| } |
| |
| if (resource instanceof IFile) { |
| numNonExcludedFiles++; |
| } else if (resource instanceof IFolder) { |
| numAddedFolders++; |
| } |
| |
| addedResources.add(resource); |
| } |
| } |
| |
| IResourceDelta[] changed = delta.getAffectedChildren(IResourceDelta.CHANGED | IResourceDelta.REMOVED); |
| for (IResourceDelta element : changed) { |
| IResource resource = element.getResource(); |
| // special rule for feature.xml files: bug 249856 |
| if (resource instanceof IFile && !isExcluded(resource) && !"feature.xml".equals(resource.getName())) { //$NON-NLS-1$ |
| if (element.getKind() == IResourceDelta.CHANGED |
| && (element.getFlags() & IResourceDelta.CONTENT) == 0) { |
| // make sure that there was a content change and not just a markers change |
| continue; |
| } |
| |
| if (hasTeamPrivate(resource)) { |
| return false; |
| } |
| if (resource instanceof IFile) { |
| numNonExcludedFiles++; |
| } |
| changedResources.add(resource); |
| } |
| } |
| return true; |
| } |
| |
| private boolean hasTeamPrivate(IResource resource) { |
| if (haveTeamPrivateMember) { |
| return true; |
| } |
| if (resource.isTeamPrivateMember()) { |
| haveTeamPrivateMember = true; |
| return true; |
| } |
| return false; |
| } |
| |
| private boolean isExcluded(IResource resource) { |
| for (IResourceExclusionStrategy exclusion : resourceExclusions) { |
| if (exclusion.isExcluded(resource)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public Set<IResource> getChangedResources() { |
| return changedResources; |
| } |
| |
| public Set<IResource> getAddedResources() { |
| return addedResources; |
| } |
| |
| public int getNumChangedAndAddedFiles() { |
| return numNonExcludedFiles; |
| } |
| |
| public int getNumAddedFolders() { |
| return numAddedFolders; |
| } |
| |
| }; |
| |
| private boolean enabled; |
| |
| private final List<IResourceExclusionStrategy> exclusions = new ArrayList<IResourceExclusionStrategy>(); |
| |
| public ResourceChangeMonitor() { |
| this.enabled = true; |
| // ant based pattern exclusion |
| exclusions.add(new ResourcePatternExclusionStrategy()); |
| // exclude resources not modified while task active |
| exclusions.add(new ResourceModifiedDateExclusionStrategy()); |
| |
| for (IResourceExclusionStrategy exclusion : exclusions) { |
| exclusion.init(); |
| } |
| } |
| |
| public void dispose() { |
| for (IResourceExclusionStrategy exclusion : exclusions) { |
| exclusion.dispose(); |
| } |
| exclusions.clear(); |
| } |
| |
| // TODO investigate moving computation to the background? |
| public void resourceChanged(IResourceChangeEvent event) { |
| if (!enabled || !ContextCore.getContextManager().isContextActive()) { |
| return; |
| } |
| if (event.getType() != IResourceChangeEvent.POST_CHANGE) { |
| return; |
| } |
| IResourceDelta rootDelta = event.getDelta(); |
| if (rootDelta != null) { |
| ResourceDeltaVisitor visitor = new ResourceDeltaVisitor(exclusions); |
| try { |
| rootDelta.accept(visitor, IContainer.INCLUDE_TEAM_PRIVATE_MEMBERS | IContainer.INCLUDE_HIDDEN); |
| if (visitor.hasValidResult()) { |
| // discard large changes as to not pollute the task context |
| if (visitor.getNumChangedAndAddedFiles() <= MAX_FILE_DELTA_SIZE |
| && visitor.getNumAddedFolders() <= MAX_NEW_FOLDER_DELTA_SIZE) { |
| ResourcesUi.addResourceToContext(visitor.getChangedResources(), |
| InteractionEvent.Kind.PREDICTION); |
| ResourcesUi.addResourceToContext(visitor.getAddedResources(), InteractionEvent.Kind.PROPAGATION); |
| } |
| } |
| } catch (CoreException e) { |
| StatusHandler.log(new Status(IStatus.ERROR, ResourcesUiBridgePlugin.ID_PLUGIN, |
| "Could not accept marker visitor", e)); //$NON-NLS-1$ |
| } |
| } |
| } |
| |
| public boolean isEnabled() { |
| return enabled; |
| } |
| |
| public void setEnabled(boolean enabled) { |
| this.enabled = enabled; |
| } |
| } |