Add Element.nameLength getter and specialize it for LibraryElement.

pkg/analyzer/lib/src/generated/element.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library engine.element;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer/src/task/dart.dart';
@@ skipping 2518 matching lines @@
    */
   List<ElementAnnotation> get metadata;
 
   /**
    * Return the name of this element, or `null` if this element does not have a
    * name.
    */
   String get name;
 
   /**
+   * Return the length of the name of this element in the file that contains the
+   * declaration of this element, or `0` if this element does not have a name.
+   */
+  int get nameLength;
+
+  /**
    * Return the offset of the name of this element in the file that contains the
    * declaration of this element, or `-1` if this element is synthetic, does not
    * have a name, or otherwise does not have an offset.
    */
   int get nameOffset;
 
   /**
    * **DEPRECATED** Use `computeNode()` instead.
    *
    * Return the resolved [AstNode] node that declares this element, or `null` if
@@ skipping 380 matching lines @@
 
   @override
   String get name => _name;
 
   void set name(String name) {
     this._name = name;
     _cachedLocation = null;
     _cachedHashCode = null;
   }
 
-  /**
-   * The offset of the name of this element in the file that contains the
-   * declaration of this element.
-   */
+  @override
+  int get nameLength => name != null ? name.length : 0;
+
+  @override
   int get nameOffset => _nameOffset;
 
   /**
    * Sets the offset of the name of this element in the file that contains the
    * declaration of this element.
    */
   void set nameOffset(int offset) {
     _nameOffset = offset;
     _cachedHashCode = null;
     _cachedLocation = null;
@@ skipping 4352 matching lines @@
    * library using a `part` directive.
    */
   List<CompilationUnitElement> _parts = CompilationUnitElement.EMPTY_LIST;
 
   /**
    * The element representing the synthetic function `loadLibrary` that is
    * defined for this library, or `null` if the element has not yet been created.
    */
   FunctionElement _loadLibraryFunction;
 
+  @override
+  final int nameLength;
+
   /**
    * The export [Namespace] of this library, `null` if it has not been
    * computed yet.
    */
   @override
   Namespace exportNamespace;
 
   /**
    * The public [Namespace] of this library, `null` if it has not been
    * computed yet.
    */
   @override
   Namespace publicNamespace;
 
   /**
    * Initialize a newly created library element in the given [context] to have
    * the given [name] and [offset].
    */
-  LibraryElementImpl(this.context, String name, int offset)
+  LibraryElementImpl(this.context, String name, int offset, this.nameLength)
       : super(name, offset);
 
   /**
    * Initialize a newly created library element in the given [context] to have
    * the given [name].
    */
   LibraryElementImpl.forNode(this.context, LibraryIdentifier name)
-      : super.forNode(name);
+      : super.forNode(name), nameLength = name != null ? name.length : 0;

[Brian Wilkerson, 2015/09/25 20:32:14]

nit: Should the call to 'super' be last?

 
   @override
   CompilationUnitElement get definingCompilationUnit =>
       _definingCompilationUnit;
 
   /**
    * Set the compilation unit that defines this library to the given compilation
    * [unit].
    */
   void set definingCompilationUnit(CompilationUnitElement unit) {
@@ skipping 581 matching lines @@
   @override
   ElementLocation get location => _baseElement.location;
 
   @override
   List<ElementAnnotation> get metadata => _baseElement.metadata;
 
   @override
   String get name => _baseElement.name;
 
   @override
+  int get nameLength => _baseElement.nameLength;
+
+  @override
   int get nameOffset => _baseElement.nameOffset;
 
   @deprecated
   @override
   AstNode get node => computeNode();
 
   @override
   Source get source => _baseElement.source;
 
   @override
@@ skipping 493 matching lines @@
   @override
   ElementLocation get location => null;
 
   @override
   List<ElementAnnotation> get metadata => ElementAnnotation.EMPTY_LIST;
 
   @override
   String get name => _name;
 
   @override
+  int get nameLength => name != null ? name.length : 0;
+
+  @override
   int get nameOffset => -1;
 
   @deprecated
   @override
   AstNode get node => null;
 
   @override
   Source get source => null;
 
   @override
@@ skipping 2323 matching lines @@
 
   @override
   void visitElement(Element element) {
     int offset = element.nameOffset;
     if (offset != -1) {
       map[offset] = element;
     }
     super.visitElement(element);
   }
 }