tweaks to the indexer to fix some files not getting indexed on reopen

and potential to get the indexer disabled.

core/org.eclipse.cdt.core/ChangeLog

@@ -1,3 +1,6 @@
+2004-06-18 Andrew Niefer
+	- DeltaProcessor.updateIndexRemoveResource() : discard if removing a project, discard index jobs for that project.
+
 2004-06-15 Hoda Amer
 	Fix for PR 63207:  ITranslationUnit.getElementAtOffset(i) does not factor in multiple namespace decl
 	

core/org.eclipse.cdt.core/index/ChangeLog

@@ -1,3 +1,9 @@
+2004-06-18 Andrew Niefer
+	- call InderManager.jobFinishedNotification( this ) from IndexRequest.cancel() so that the IndexManager's jobSet doesn't 
+	  become stale.
+	- in JobManager.discardJobs, move getting the old enabledState into the synchronized block so that we can be sure its 
+	  reset correctly
+
 2004-06-16 Bogdan Gheorghe
 	- Removed reporting index failed messages from log
 	

core/org.eclipse.cdt.core/index/org/eclipse/cdt/internal/core/search/indexing/IndexRequest.java

@@ -34,13 +34,14 @@ public abstract class IndexRequest implements IJob {
 	}
 	
 	public void cancel() {
+		this.manager.jobFinishedNotification( this );
 		this.manager.jobWasCancelled(this.indexPath);
 		this.isCancelled = true;
 	}
 	
 	public boolean isReadyToRun() {
 		IProject project = CCorePlugin.getWorkspace().getRoot().getProject(indexPath.segment(0));
-		if ( !this.manager.isIndexEnabled( project ) )
+		if ( !project.isAccessible() || !this.manager.isIndexEnabled( project ) )
 			return false;
 		
 		// tag the index as inconsistent

core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/model/DeltaProcessor.java

@@ -584,7 +584,10 @@ public class DeltaProcessor {
 
 		switch (element.getElementType()) {
 			case ICElement.C_PROJECT :
-						indexManager.removeIndexFamily(element.getCProject().getProject().getFullPath());
+						IPath fullPath = element.getCProject().getProject().getFullPath();
+						if( delta.getKind() == IResourceDelta.CHANGED )
+							indexManager.discardJobs(fullPath.segment(0));
+						indexManager.removeIndexFamily(fullPath);
 						// NB: Discarding index jobs belonging to this project was done during PRE_DELETE
 						break;
 						// NB: Update of index if project is opened, closed, or its c nature is added or removed

core/org.eclipse.cdt.core/search/org/eclipse/cdt/internal/core/search/processing/JobManager.java

@@ -112,12 +112,13 @@ public abstract class JobManager implements Runnable {
 		if (VERBOSE)
 			JobManager.verbose("DISCARD   background job family - " + jobFamily); //$NON-NLS-1$
 
-		int oldEnabledState = enabledState();
+		int oldEnabledState = 0;
 		try {
 			IJob currentJob;
 			// cancel current job if it belongs to the given family
 			synchronized(this){
 				currentJob = this.currentJob();
+				oldEnabledState = enabledState();
 				disable();
 			}
 			if (currentJob != null