From 6ecaea8010233246adb37fe273d149e4106d73bd Mon Sep 17 00:00:00 2001
From: Markus Schorn <markus.schorn@windriver.com>
Date: Wed, 15 Jul 2009 06:43:57 +0000
Subject: [PATCH] Suppress empty pdom notifications, follow up bug 248849.

---
 .../org/eclipse/cdt/internal/core/pdom/PDOM.java | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOM.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOM.java
index be022daa7d2..b727db82a83 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOM.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOM.java
@@ -235,15 +235,6 @@ public class PDOM extends PlatformObject implements IPDOM {
 		private boolean fReloaded= false;
 		private boolean fNewFiles= false;
 
-		public void clear() {
-			fReloaded= false;
-			fCleared= false;
-			fNewFiles= false;
-			
-			fClearedFiles.clear();
-			fFilesWritten.clear();
-		}
-
 		private void setCleared() {
 			fCleared= true;
 			fReloaded= false;
@@ -273,6 +264,10 @@ public class PDOM extends PlatformObject implements IPDOM {
 		public boolean hasNewFiles() {
 			return fNewFiles;
 		}
+
+		public boolean isTrivial() {
+			return !fCleared && !fReloaded && !fNewFiles && fClearedFiles.isEmpty() && fFilesWritten.isEmpty();
+		}
 	}
 	public static interface IListener {
 		public void handleChange(PDOM pdom, ChangeEvent event);
@@ -386,8 +381,9 @@ public class PDOM extends PlatformObject implements IPDOM {
 	}
 
 	private void fireChange(ChangeEvent event) {
-		if (listeners == null)
+		if (listeners == null || event.isTrivial())
 			return;
+		
 		Iterator<IListener> i = listeners.iterator();
 		while (i.hasNext())
 			i.next().handleChange(this, event);