Avoid infinite selection update bouncing between editors and navigator

Issue-Ref: 3535
Issue-Url: https://af3-developer.fortiss.org/issues/3535

Signed-off-by: Simon Barner <barner@fortiss.org>

org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/util/.ratings

@@ -7,7 +7,7 @@ EObjectSelectionUtils.java 928280b5dd3bb634debc1ac3be9f15b4e45f2683 GREEN
 KernelUIUtils.java b038a28a44e17e5bca4d71f5dee70ee92e5324b9 GREEN
 ObservableUtils.java 2ffced494a86bd7e8f8eb8882aec38b06f0f2818 GREEN
 PropertiesConstantUtils.java 59b1a1e4d594bb98db3aa396f2ff6474ba405920 GREEN
-SelectionUtils.java 136096917a2357678c54339543a14fc3a63edf6d GREEN
+SelectionUtils.java 3d20f87eaaee04173686ef62b09ca6971702cd00 YELLOW
 TutorialUIServiceUtils.java 416970bb9bd305acee064e2ac199df39cc98b475 GREEN
 UndoRedoImpl.java f218500875bda0ef52f4cc2ccdf452825e6751f7 GREEN
 WidgetsFactory.java e92285bee3189ecf1a3fbaede3c4ffb237fc81ed GREEN

org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/util/SelectionUtils.java

@@ -143,7 +143,9 @@ public class SelectionUtils {
 		ISelection selection = new StructuredSelection(eObjects);
 		if(updateNavigator) {
 			INavigatorService ns = INavigatorService.getInstance();
-			ns.setCurrentSelection(selection);
+			if(!selectAll(ns.getCurrentSelection(), Object.class).containsAll(eObjects)) {
+				ns.setCurrentSelection(selection);
+			}
 		}
 
 		if(!updateActiveEditor) {
@@ -164,6 +166,8 @@ public class SelectionUtils {
 			return;
 		}
 
-		selectionProvider.setSelection(selection);
+		if(!selectAll(selectionProvider.getSelection(), Object.class).containsAll(eObjects)) {
+			selectionProvider.setSelection(selection);
+		}
 	}
 }