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

 /*
  * Copyright (c) 2013, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
@@ skipping 40 matching lines @@
   }
 
   /**
    * Get the element associated with the selected portion of the given input element.
    * 
    * @param editor the editor
    * @param caret the caret position in the editor
    * @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;
     }
 
     return ElementLocator.locate(node);
   }
 
   /**
    * Get the element associated with the selected portion of the given input element.
    * 
@@ skipping 87 matching lines @@
         }
         return null;
       }
 
       private boolean isNodeEnclosingOffset(ASTNode node) {
         return node.getOffset() <= offset && offset <= node.getEnd();
       }
     });
     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);
+  }
 }