| package org.eclipse.cdt.internal.ui.util; |
| |
| /* |
| * (c) Copyright IBM Corp. 2000, 2001. |
| * All Rights Reserved. |
| */ |
| |
| import org.eclipse.cdt.core.model.ICModelMarker; |
| import org.eclipse.cdt.core.CProjectNature; |
| import org.eclipse.cdt.ui.CUIPlugin; |
| |
| 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.IPath; |
| |
| import org.eclipse.jface.util.ListenerList; |
| |
| |
| /** |
| * 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 { |
| |
| /** |
| * Visitors used to filter the element delta changes |
| */ |
| 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) { |
| try { |
| IProject project= (IProject) res; |
| if (!project.isAccessible() || !project.hasNature(CProjectNature.C_NATURE_ID)) { |
| // only track open C projects |
| return false; |
| } |
| } catch (CoreException e) { |
| CUIPlugin.getDefault().log(e.getStatus()); |
| return false; |
| } |
| } |
| checkInvalidate(delta, res.getFullPath()); |
| return true; |
| } |
| |
| private void checkInvalidate(IResourceDelta delta, IPath path) { |
| int kind= delta.getKind(); |
| if (kind == IResourceDelta.REMOVED || kind == IResourceDelta.ADDED || (kind == IResourceDelta.CHANGED && isErrorDelta(delta))) { |
| // invalidate the path and all parent paths |
| while (!path.isEmpty() && !path.isRoot() && !fChangedElements.contains(path)) { |
| fChangedElements.add(path); |
| path= path.removeLastSegments(1); |
| } |
| } |
| } |
| |
| 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(ICModelMarker.C_MODEL_PROBLEM_MARKER)) { |
| 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(5); |
| } |
| |
| /* |
| * @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) { |
| CUIPlugin.getDefault().log(e.getStatus()); |
| } |
| |
| if (changedElements.size() > 0) { |
| fireChanges(changedElements); |
| } |
| } |
| |
| /** |
| * Adds a listener for problem marker changes. |
| */ |
| public void addListener(IProblemChangedListener listener) { |
| if (fListeners.isEmpty()) { |
| CUIPlugin.getWorkspace().addResourceChangeListener(this); |
| } |
| fListeners.add(listener); |
| } |
| |
| /** |
| * Removes a <code>IProblemChangedListener</code>. |
| */ |
| public void removeListener(IProblemChangedListener listener) { |
| fListeners.remove(listener); |
| if (fListeners.isEmpty()) { |
| CUIPlugin.getWorkspace().removeResourceChangeListener(this); |
| } |
| } |
| |
| private void fireChanges(Set changes) { |
| Object[] listeners= fListeners.getListeners(); |
| for (int i= 0; i < listeners.length; i++) { |
| IProblemChangedListener curr= (IProblemChangedListener) listeners[i]; |
| curr.problemsChanged(changes); |
| } |
| } |
| } |
| |