Bug 46753 [misc] Typing should not be blocked by background activity
Build 20031111 1. Open an editor 2. Start a CVS background activity (e.g. Synchronize several projects) 3. Start typing in the editor Observe: The whole UI freezes and what you typed is not shown in the editor until the end of the backgroung activity
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/filebuffers/CompilationUnitDocumentProvider2.java
* @see org.eclipse.jface.text.source.AnnotationModel#fireModelChanged(org.eclipse.jface.text.source.AnnotationModelEvent)
			 */
			protected void fireModelChanged(AnnotationModelEvent event) {
				if (event instanceof CompilationUnitAnnotationModelEvent) {
					CompilationUnitAnnotationModelEvent e= (CompilationUnitAnnotationModelEvent) event;
					fIncludesProblemAnnotationChanges= e.includesProblemMarkerAnnotationChanges();
				}
				super.fireModelChanged(event);
			}
			
			/*
			 * @see IProblemRequestor#isActive()
			 */
			public boolean isActive() {
				return fIsActive && (fCollectedProblems != null);
			}
			
			/*
			 * @see IProblemRequestorExtension#setProgressMonitor(IProgressMonitor)
			 */
			public void setProgressMonitor(IProgressMonitor monitor) {
				fProgressMonitor= monitor;
			}
			
			/*
			 * @see IProblemRequestorExtension#setIsActive(boolean)
			 */
			public void setIsActive(boolean isActive) {
				if (fIsActive != isActive) {
					fIsActive= isActive;