| /******************************************************************************* |
| * Copyright (c) 2000, 2017 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 |
| * |
| *******************************************************************************/ |
| package org.eclipse.dltk.ui.viewsupport; |
| |
| import java.util.HashSet; |
| |
| 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.core.runtime.CoreException; |
| import org.eclipse.core.runtime.ListenerList; |
| import org.eclipse.dltk.internal.ui.util.SWTUtil; |
| import org.eclipse.dltk.ui.DLTKUIPlugin; |
| import org.eclipse.dltk.ui.editor.SourceModuleAnnotationModelEvent; |
| 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.swt.widgets.Display; |
| |
| /** |
| * 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 fChangedElements; |
| |
| public ProjectErrorVisitor(HashSet 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; |
| |
| public ProblemMarkerManager() { |
| fListeners = new ListenerList<>(); |
| } |
| |
| @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) { |
| DLTKUIPlugin.log(e.getStatus()); |
| } |
| |
| if (!changedElements.isEmpty()) { |
| IResource[] changes = changedElements |
| .toArray(new IResource[changedElements.size()]); |
| fireChanges(changes, true); |
| } |
| } |
| |
| @Override |
| public void modelChanged(IAnnotationModel model) { |
| // no action |
| } |
| |
| @Override |
| public void modelChanged(AnnotationModelEvent event) { |
| if (event instanceof SourceModuleAnnotationModelEvent) { |
| SourceModuleAnnotationModelEvent cuEvent = (SourceModuleAnnotationModelEvent) event; |
| if (cuEvent.includesProblemMarkerAnnotationChanges()) { |
| IResource[] changes = new IResource[] { |
| cuEvent.getUnderlyingResource() }; |
| fireChanges(changes, false); |
| } |
| } |
| } |
| |
| /** |
| * Adds a listener for problem marker changes. |
| */ |
| public void addListener(IProblemChangedListener listener) { |
| if (fListeners.isEmpty()) { |
| DLTKUIPlugin.getWorkspace().addResourceChangeListener(this); |
| DLTKUIPlugin.getDefault().getSourceModuleDocumentProvider() |
| .addGlobalAnnotationModelListener(this); |
| } |
| fListeners.add(listener); |
| } |
| |
| /** |
| * Removes a <code>IProblemChangedListener</code>. |
| */ |
| public void removeListener(IProblemChangedListener listener) { |
| fListeners.remove(listener); |
| if (fListeners.isEmpty()) { |
| DLTKUIPlugin.getWorkspace().removeResourceChangeListener(this); |
| DLTKUIPlugin.getDefault().getSourceModuleDocumentProvider() |
| .removeGlobalAnnotationModelListener(this); |
| } |
| } |
| |
| private void fireChanges(final IResource[] changes, |
| final boolean isMarkerChange) { |
| Display display = SWTUtil.getStandardDisplay(); |
| if (display != null && !display.isDisposed()) { |
| display.asyncExec(() -> { |
| for (IProblemChangedListener curr : fListeners) { |
| curr.problemsChanged(changes, isMarkerChange); |
| } |
| }); |
| } |
| } |
| |
| } |