Add codeOffset/codeLength properties to ElementImpl.

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

Index: pkg/analyzer/lib/src/dart/element/element.dart
diff --git a/pkg/analyzer/lib/src/dart/element/element.dart b/pkg/analyzer/lib/src/dart/element/element.dart
index 516aa1f14f06b5bfec872794a4cd30fabf0a5c73..ce19fe3fac5844cbe2a4ee9ea62f3d38dbb6499c 100644
--- a/pkg/analyzer/lib/src/dart/element/element.dart
+++ b/pkg/analyzer/lib/src/dart/element/element.dart
@@ -1730,6 +1730,17 @@ abstract class ElementImpl implements Element {
   int _docRangeLength;
 
   /**
+   * The offset of the beginning of the element's code in the file that contains
+   * the element, or `null` if the element is synthetic.
+   */
+  int _codeOffset;
+
+  /**
+   * The length of the element's code, or `null` if the element is synthetic.
+   */
+  int _codeLength;
+
+  /**
    * Initialize a newly created element to have the given [name] at the given
    * [_nameOffset].
    */
@@ -1743,6 +1754,17 @@ abstract class ElementImpl implements Element {
   ElementImpl.forNode(Identifier name)
       : this(name == null ? "" : name.name, name == null ? -1 : name.offset);
 
+  /**
+   * The length of the element's code, or `null` if the element is synthetic.
+   */
+  int get codeLength => _codeLength;
+
+  /**
+   * The offset of the beginning of the element's code in the file that contains
+   * the element, or `null` if the element is synthetic.
+   */
+  int get codeOffset => _codeOffset;
+
   @override
   AnalysisContext get context {
     if (_enclosingElement == null) {
@@ -2023,6 +2045,14 @@ abstract class ElementImpl implements Element {
   }
 
   /**
+   * Set the code range for this element.
+   */
+  void setCodeRange(int offset, int length) {
+    _codeOffset = offset;
+    _codeLength = length;
+  }
+
+  /**
    * Set the documentation comment source range for this element.
    */
   void setDocRange(int offset, int length) {
@@ -3102,6 +3132,24 @@ class LibraryElementImpl extends ElementImpl implements LibraryElement {
         nameLength = name != null ? name.length : 0;
 
   @override
+  int get codeLength {
+    if (_definingCompilationUnit is CompilationUnitElementImpl) {
+      return (_definingCompilationUnit as CompilationUnitElementImpl)
+          .codeLength;
+    }
+    return null;
+  }
+
+  @override
+  int get codeOffset {
+    if (_definingCompilationUnit is CompilationUnitElementImpl) {
+      return (_definingCompilationUnit as CompilationUnitElementImpl)
+          .codeOffset;
+    }
+    return null;
+  }
+
+  @override
   CompilationUnitElement get definingCompilationUnit =>
       _definingCompilationUnit;