/*******************************************************************************
* Copyright (c) 2007 IBM Corporation.
* 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:
* Robert Fuhrer (rfuhrer@watson.ibm.com) - initial API and implementation
*******************************************************************************/
package org.eclipse.imp.editor.internal;
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.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.imp.editor.IProblemChangedListener;
import org.eclipse.imp.runtime.RuntimePlugin;
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. Based on class of the same name from JDT/UI.
*
* @author Robert M. Fuhrer
*/
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;
}
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 fListeners;
public ProblemMarkerManager() {
fListeners= new ListenerList();
}
/*
* @see IResourceChangeListener#resourceChanged
*/
public void resourceChanged(IResourceChangeEvent event) {
HashSet<IResource> changedElements= new HashSet<IResource>();
try {
IResourceDelta delta= event.getDelta();
if (delta != null)
delta.accept(new ProjectErrorVisitor(changedElements));
} catch (CoreException e) {
RuntimePlugin.getInstance().logException("", e);
}
if (!changedElements.isEmpty()) {
IResource[] changes= (IResource[]) changedElements.toArray(new IResource[changedElements.size()]);
fireChanges(changes, true);
}
}
/*
* (non-Javadoc)
*
* @see IAnnotationModelListener#modelChanged(IAnnotationModel)
*/
public void modelChanged(IAnnotationModel model) {
// no action
}
/*
* (non-Javadoc)
*
* @see IAnnotationModelListenerExtension#modelChanged(AnnotationModelEvent)
*/
public void modelChanged(AnnotationModelEvent event) {
// TODO Need to create the analogous bit of logic here... need more stuff in UniversalEditor and friends...
// if (event instanceof CompilationUnitAnnotationModelEvent) {
// CompilationUnitAnnotationModelEvent cuEvent= (CompilationUnitAnnotationModelEvent) event;
// if (cuEvent.includesProblemMarkerAnnotationChanges()) {
// IResource[] changes= new IResource[] { event.getUnderlyingResource() };
//
// fireChanges(changes, false);
// }
// }
}
/**
* Adds a listener for problem marker changes.
*/
public void addListener(IProblemChangedListener listener) {
if (fListeners.isEmpty()) {
ResourcesPlugin.getWorkspace().addResourceChangeListener(this);
// TODO Need to create the analogous bit of logic here... need more stuff in UniversalEditor and friends...
// RuntimePlugin.getInstance().getCompilationUnitDocumentProvider().addGlobalAnnotationModelListener(this);
}
fListeners.add(listener);
}
/**
* Removes a <code>IProblemChangedListener</code>.
*/
public void removeListener(IProblemChangedListener listener) {
fListeners.remove(listener);
if (fListeners.isEmpty()) {
ResourcesPlugin.getWorkspace().removeResourceChangeListener(this);
// TODO Need to create the analogous bit of logic here... need more stuff in UniversalEditor and friends...
// RuntimePlugin.getInstance().getCompilationUnitDocumentProvider().removeGlobalAnnotationModelListener(this);
}
}
private void fireChanges(final IResource[] changes, final boolean isMarkerChange) {
//Display display= SWTUtil.getStandardDisplay();
Display display = Display.getCurrent();
if (display == null)
display= Display.getDefault();
if (display != null && !display.isDisposed()) {
display.asyncExec(new Runnable() {
public void run() {
Object[] listeners= fListeners.getListeners();
for(int i= 0; i < listeners.length; i++) {
IProblemChangedListener curr= (IProblemChangedListener) listeners[i];
curr.problemsChanged(changes, isMarkerChange);
}
}
});
}
}
}