Issue 4497. Show the best known type in the text hover.

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/actions/NewSelectionConverter.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/actions/NewSelectionConverter.java
diff --git a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/actions/NewSelectionConverter.java b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/actions/NewSelectionConverter.java
index 4e372b26e19e1d26b988c2538a75e8f813e16e6e..a08ce9a66d223e23ec2fe04e137a28339441128e 100644
--- a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/actions/NewSelectionConverter.java
+++ b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/actions/NewSelectionConverter.java
@@ -58,13 +58,7 @@ public class NewSelectionConverter {
    * @return the associated element
    */
   public static Element getElementAtOffset(DartEditor editor, int caret) {
-
-    CompilationUnit cu = editor.getInputUnit();
-    if (cu == null) {
-      return null;
-    }
-
-    ASTNode node = new NodeLocator(caret).searchWithin(cu);
+    ASTNode node = getNodeAtOffset(editor, caret);
     if (node == null) {
       return null;
     }
@@ -172,4 +166,19 @@ public class NewSelectionConverter {
     });
     return result[0];
   }
+
+  /**
+   * Get the {@link ASTNode} associated with the selected portion of the given editor.
+   * 
+   * @param editor the editor
+   * @param caret the caret position in the editor
+   * @return the associated {@link ASTNode}
+   */
+  public static ASTNode getNodeAtOffset(DartEditor editor, int caret) {
+    CompilationUnit cu = editor.getInputUnit();
+    if (cu == null) {
+      return null;
+    }
+    return new NodeLocator(caret).searchWithin(cu);
+  }
 }