/*******************************************************************************
* Copyright (c) 2005, 2008 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
* QNX Software System
*******************************************************************************/
package org.eclipse.cdt.internal.ui.util;
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.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;
import org.eclipse.cdt.ui.CUIPlugin;
import org.eclipse.cdt.internal.ui.editor.TranslationUnitAnnotationModelEvent;
/**
* 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 filter the element delta changes
*/
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 C 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 path and all parent paths
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 (IMarkerDelta markerDelta : markerDeltas) {
if (markerDelta.isSubtypeOf(IMarker.PROBLEM)) {
int kind = markerDelta.getKind();
if (kind == IResourceDelta.ADDED || kind == IResourceDelta.REMOVED)
return true;
int severity = markerDelta.getAttribute(IMarker.SEVERITY, -1);
int newSeverity = markerDelta.getMarker().getAttribute(IMarker.SEVERITY, -1);
if (newSeverity != severity)
return true;
}
}
}
return false;
}
}
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) {
CUIPlugin.log(e.getStatus());
}
if (!changedElements.isEmpty()) {
IResource[] changes = 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) {
if (event instanceof TranslationUnitAnnotationModelEvent) {
TranslationUnitAnnotationModelEvent cuEvent = (TranslationUnitAnnotationModelEvent)event;
if (cuEvent.includesProblemMarkerAnnotationChanges()) {
//IResource[] changes= new IResource[]
// {cuEvent.getUnderlyingResource()};
IResource res = cuEvent.getUnderlyingResource();
if (res != null) {
fireChanges(new IResource[]{res}, false);
}
}
}
}
/**
* Adds a listener for problem marker changes.
*/
public void addListener(IProblemChangedListener listener) {
if (fListeners.isEmpty()) {
CUIPlugin.getWorkspace().addResourceChangeListener(this);
CUIPlugin.getDefault().getDocumentProvider().addGlobalAnnotationModelListener(this);
}
fListeners.add(listener);
}
/**
* Removes a <code>IProblemChangedListener</code>.
*/
public void removeListener(IProblemChangedListener listener) {
fListeners.remove(listener);
if (fListeners.isEmpty()) {
CUIPlugin.getWorkspace().removeResourceChangeListener(this);
CUIPlugin.getDefault().getDocumentProvider().removeGlobalAnnotationModelListener(this);
}
}
private void fireChanges(final IResource[] changes, final boolean markerChanged) {
Display display = SWTUtil.getStandardDisplay();
if (display != null && !display.isDisposed()) {
display.asyncExec(new Runnable() {
public void run() {
Object[] listeners = fListeners.getListeners();
for (Object listener : listeners) {
IProblemChangedListener curr = (IProblemChangedListener)listener;
curr.problemsChanged(changes, markerChanged);
}
}
});
}
}
}