| /******************************************************************************* |
| * Copyright (c) 2000, 2016 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.jdt.internal.ui.viewsupport; |
| |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.swt.widgets.Display; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.ListenerList; |
| import org.eclipse.core.runtime.Status; |
| |
| import org.eclipse.core.resources.IMarker; |
| import org.eclipse.core.resources.IMarkerDelta; |
| 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.jface.text.source.AnnotationModelEvent; |
| import org.eclipse.jface.text.source.IAnnotationModel; |
| import org.eclipse.jface.text.source.IAnnotationModelListener; |
| import org.eclipse.jface.text.source.IAnnotationModelListenerExtension; |
| |
| import org.eclipse.ui.PlatformUI; |
| import org.eclipse.ui.progress.UIJob; |
| |
| import org.eclipse.jdt.internal.ui.JavaPlugin; |
| import org.eclipse.jdt.internal.ui.JavaUIMessages; |
| import org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitAnnotationModelEvent; |
| |
| /** |
| * Listens to resource deltas and filters for marker changes of type IMarker.PROBLEM |
| * Viewers showing error ticks should register as listener to |
| * this type. |
| */ |
| public class ProblemMarkerManager implements IResourceChangeListener, IAnnotationModelListener , IAnnotationModelListenerExtension { |
| |
| /** |
| * Visitors used to look if the element change delta contains a marker change. |
| */ |
| private static class ProjectErrorVisitor implements IResourceDeltaVisitor { |
| |
| private HashSet<IResource> fChangedElements; |
| |
| public ProjectErrorVisitor(HashSet<IResource> changedElements) { |
| fChangedElements= changedElements; |
| } |
| |
| @Override |
| public boolean visit(IResourceDelta delta) throws CoreException { |
| IResource res= delta.getResource(); |
| if (res instanceof IProject && delta.getKind() == IResourceDelta.CHANGED) { |
| IProject project= (IProject) res; |
| if (!project.isAccessible()) { |
| // only track open Java projects |
| return false; |
| } |
| } |
| checkInvalidate(delta, res); |
| return true; |
| } |
| |
| private void checkInvalidate(IResourceDelta delta, IResource resource) { |
| int kind= delta.getKind(); |
| if (kind == IResourceDelta.REMOVED || kind == IResourceDelta.ADDED || (kind == IResourceDelta.CHANGED && isErrorDelta(delta))) { |
| // invalidate the resource and all parents |
| while (resource.getType() != IResource.ROOT && fChangedElements.add(resource)) { |
| resource= resource.getParent(); |
| } |
| } |
| } |
| |
| private boolean isErrorDelta(IResourceDelta delta) { |
| if ((delta.getFlags() & IResourceDelta.MARKERS) != 0) { |
| IMarkerDelta[] markerDeltas= delta.getMarkerDeltas(); |
| for (int i= 0; i < markerDeltas.length; i++) { |
| if (markerDeltas[i].isSubtypeOf(IMarker.PROBLEM)) { |
| int kind= markerDeltas[i].getKind(); |
| if (kind == IResourceDelta.ADDED || kind == IResourceDelta.REMOVED) |
| return true; |
| int severity= markerDeltas[i].getAttribute(IMarker.SEVERITY, -1); |
| int newSeverity= markerDeltas[i].getMarker().getAttribute(IMarker.SEVERITY, -1); |
| if (newSeverity != severity) |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| } |
| |
| private ListenerList<IProblemChangedListener> fListeners; |
| |
| private Set<IResource> fResourcesWithMarkerChanges; |
| private Set<IResource> fResourcesWithAnnotationChanges; |
| |
| private UIJob fNotifierJob; |
| |
| public ProblemMarkerManager() { |
| fListeners= new ListenerList<>(); |
| fResourcesWithMarkerChanges= new HashSet<>(); |
| fResourcesWithAnnotationChanges= new HashSet<>(); |
| } |
| |
| /* |
| * @see IResourceChangeListener#resourceChanged |
| */ |
| @Override |
| public void resourceChanged(IResourceChangeEvent event) { |
| HashSet<IResource> changedElements= new HashSet<>(); |
| |
| try { |
| IResourceDelta delta= event.getDelta(); |
| if (delta != null) |
| delta.accept(new ProjectErrorVisitor(changedElements)); |
| } catch (CoreException e) { |
| JavaPlugin.log(e.getStatus()); |
| } |
| |
| if (!changedElements.isEmpty()) { |
| boolean hasChanges= false; |
| synchronized (this) { |
| if (fResourcesWithMarkerChanges.isEmpty()) { |
| fResourcesWithMarkerChanges= changedElements; |
| hasChanges= true; |
| } else { |
| hasChanges= fResourcesWithMarkerChanges.addAll(changedElements); |
| } |
| } |
| if (hasChanges) { |
| fireChanges(); |
| } |
| } |
| } |
| |
| @Override |
| public void modelChanged(IAnnotationModel model) { |
| // no action |
| } |
| |
| @Override |
| public void modelChanged(AnnotationModelEvent event) { |
| if (event instanceof CompilationUnitAnnotationModelEvent) { |
| CompilationUnitAnnotationModelEvent cuEvent= (CompilationUnitAnnotationModelEvent) event; |
| if (cuEvent.includesProblemMarkerAnnotationChanges()) { |
| boolean hasChanges= false; |
| synchronized (this) { |
| IResource changedResource= cuEvent.getUnderlyingResource(); |
| hasChanges= fResourcesWithAnnotationChanges.add(changedResource); |
| } |
| if (hasChanges) { |
| fireChanges(); |
| } |
| } |
| } |
| } |
| |
| |
| /** |
| * Adds a listener for problem marker changes. |
| * @param listener the listener to add |
| */ |
| public void addListener(IProblemChangedListener listener) { |
| if (fListeners.isEmpty()) { |
| JavaPlugin.getWorkspace().addResourceChangeListener(this); |
| JavaPlugin.getDefault().getCompilationUnitDocumentProvider().addGlobalAnnotationModelListener(this); |
| } |
| fListeners.add(listener); |
| } |
| |
| /** |
| * Removes a <code>IProblemChangedListener</code>. |
| * @param listener the listener to remove |
| */ |
| public void removeListener(IProblemChangedListener listener) { |
| fListeners.remove(listener); |
| if (fListeners.isEmpty()) { |
| JavaPlugin.getWorkspace().removeResourceChangeListener(this); |
| JavaPlugin.getDefault().getCompilationUnitDocumentProvider().removeGlobalAnnotationModelListener(this); |
| } |
| } |
| |
| private void fireChanges() { |
| Display display= PlatformUI.getWorkbench().getDisplay(); |
| if (display != null && !display.isDisposed()) { |
| postAsyncUpdate(display); |
| } |
| } |
| |
| private void postAsyncUpdate(final Display display) { |
| if (fNotifierJob == null) { |
| fNotifierJob= new UIJob(display, JavaUIMessages.ProblemMarkerManager_problem_marker_update_job_description) { |
| @Override |
| public IStatus runInUIThread(IProgressMonitor monitor) { |
| runPendingUpdates(); |
| return Status.OK_STATUS; |
| } |
| }; |
| fNotifierJob.setSystem(true); |
| } |
| fNotifierJob.schedule(); |
| } |
| |
| /** |
| * Notify all IProblemChangedListener. Must be called in the display thread. |
| */ |
| private void runPendingUpdates() { |
| IResource[] markerResources= null; |
| IResource[] annotationResources= null; |
| synchronized (this) { |
| if (!fResourcesWithMarkerChanges.isEmpty()) { |
| markerResources= fResourcesWithMarkerChanges.toArray(new IResource[fResourcesWithMarkerChanges.size()]); |
| fResourcesWithMarkerChanges.clear(); |
| } |
| if (!fResourcesWithAnnotationChanges.isEmpty()) { |
| annotationResources= fResourcesWithAnnotationChanges.toArray(new IResource[fResourcesWithAnnotationChanges.size()]); |
| fResourcesWithAnnotationChanges.clear(); |
| } |
| } |
| for (IProblemChangedListener curr : fListeners) { |
| if (markerResources != null) { |
| curr.problemsChanged(markerResources, true); |
| } |
| if (annotationResources != null) { |
| curr.problemsChanged(annotationResources, false); |
| } |
| } |
| } |
| |
| } |