From 518c0a6a98b7bac2470fa9802321354e2aaa2daa Mon Sep 17 00:00:00 2001
From: Dmitry Jemerov <yole@jetbrains.com>
Date: Thu, 19 Aug 2010 16:30:23 +0400
Subject: [PATCH] don't create UsageTargets from elements which don't implement
 NavigationItem (PY-1608)

---
 .../codeInsight/highlighting/HighlightUsagesHandler.java  | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/platform/lang-impl/src/com/intellij/codeInsight/highlighting/HighlightUsagesHandler.java b/platform/lang-impl/src/com/intellij/codeInsight/highlighting/HighlightUsagesHandler.java
index 32b66903242e..fd86a51808ab 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/highlighting/HighlightUsagesHandler.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/highlighting/HighlightUsagesHandler.java
@@ -22,6 +22,7 @@ import com.intellij.find.EditorSearchComponent;
 import com.intellij.find.findUsages.PsiElement2UsageTargetAdapter;
 import com.intellij.injected.editor.EditorWindow;
 import com.intellij.lang.injection.InjectedLanguageManager;
+import com.intellij.navigation.NavigationItem;
 import com.intellij.openapi.actionSystem.ActionManager;
 import com.intellij.openapi.actionSystem.IdeActions;
 import com.intellij.openapi.actionSystem.Shortcut;
@@ -79,7 +80,12 @@ public class HighlightUsagesHandler extends HighlightHandlerBase {
     if (usageTargets == null) {
       PsiElement targetElement = getTargetElement(editor, file);
       if (targetElement != null) {
-        usageTargets = new UsageTarget[]{new PsiElement2UsageTargetAdapter(targetElement)};
+        if (!(targetElement instanceof NavigationItem)) {
+          targetElement = targetElement.getNavigationElement();
+        }
+        if (targetElement instanceof NavigationItem) {
+          usageTargets = new UsageTarget[]{new PsiElement2UsageTargetAdapter(targetElement)};
+        }
       }
     }