package com.aptana.editor.php.internal.ui.viewsupport;
import java.util.HashSet;
import java.util.Set;
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.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.text.source.IAnnotationModel;
import org.eclipse.jface.text.source.IAnnotationModelListener;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.progress.UIJob;
import com.aptana.core.logging.IdeLog;
import com.aptana.editor.php.epl.PHPEplPlugin;
/**
* Listens to resource deltas and filters for marker changes of type IMarker.PROBLEM Viewers showing error ticks should
* register as listener to this type.
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
public class ProblemMarkerManager implements IResourceChangeListener, IAnnotationModelListener
{
/**
* 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;
}
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;
private Set fResourcesWithMarkerChanges;
private Set fResourcesWithAnnotationChanges;
private UIJob fNotifierJob;
public ProblemMarkerManager()
{
fListeners = new ListenerList();
fResourcesWithMarkerChanges = new HashSet();
fResourcesWithAnnotationChanges = new HashSet();
}
/*
* @see IResourceChangeListener#resourceChanged
*/
public void resourceChanged(IResourceChangeEvent event)
{
HashSet changedElements = new HashSet();
try
{
IResourceDelta delta = event.getDelta();
if (delta != null)
delta.accept(new ProjectErrorVisitor(changedElements));
}
catch (CoreException e)
{
IdeLog.logError(PHPEplPlugin.getDefault(),
"Error updating the PHP problem markers after a resource change", e); //$NON-NLS-1$
}
if (!changedElements.isEmpty())
{
boolean hasChanges = false;
synchronized (this)
{
if (fResourcesWithMarkerChanges.isEmpty())
{
fResourcesWithMarkerChanges = changedElements;
hasChanges = true;
}
else
{
hasChanges = fResourcesWithMarkerChanges.addAll(changedElements);
}
}
if (hasChanges)
{
fireChanges();
}
}
}
/*
* (non-Javadoc)
* @see IAnnotationModelListener#modelChanged(IAnnotationModel)
*/
public void modelChanged(IAnnotationModel model)
{
// no action
}
/**
* Adds a listener for problem marker changes.
*
* @param listener
* the listener to add
*/
public void addListener(IProblemChangedListener listener)
{
if (fListeners.isEmpty())
{
PHPEplPlugin.getWorkspace().addResourceChangeListener(this);
// PHPEplPlugin.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())
{
PHPEplPlugin.getWorkspace().removeResourceChangeListener(this);
// JavaPlugin.getDefault().getCompilationUnitDocumentProvider().removeGlobalAnnotationModelListener(this);
}
}
private void fireChanges()
{
Display display = PHPEplPlugin.getStandardDisplay();
if (display != null && !display.isDisposed())
{
postAsyncUpdate(display);
}
}
private void postAsyncUpdate(final Display display)
{
if (fNotifierJob == null)
{
fNotifierJob = new UIJob(display, "Sending problem marker updates...") { //$NON-NLS-1$
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 = (IResource[]) fResourcesWithMarkerChanges
.toArray(new IResource[fResourcesWithMarkerChanges.size()]);
fResourcesWithMarkerChanges.clear();
}
if (!fResourcesWithAnnotationChanges.isEmpty())
{
annotationResources = (IResource[]) fResourcesWithAnnotationChanges
.toArray(new IResource[fResourcesWithAnnotationChanges.size()]);
fResourcesWithAnnotationChanges.clear();
}
}
Object[] listeners = fListeners.getListeners();
for (int i = 0; i < listeners.length; i++)
{
IProblemChangedListener curr = (IProblemChangedListener) listeners[i];
if (markerResources != null)
{
curr.problemsChanged(markerResources, true);
}
if (annotationResources != null)
{
curr.problemsChanged(annotationResources, false);
}
}
}
}