Derive source information from ResolvedAst.

pkg/compiler/lib/src/io/start_end_information.dart

 // Copyright (c) 2015, 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.
 
 /// Source information system that maps spans of Dart AST nodes to spans of
 /// JavaScript nodes.
 
 library dart2js.source_information.start_end;
 
 import '../common.dart';
 import '../diagnostics/messages.dart' show MessageTemplate;
-import '../elements/elements.dart' show AstElement;
+import '../elements/elements.dart' show AstElement, ResolvedAst, ResolvedAstKind;
 import '../js/js.dart' as js;
 import '../js/js_source_mapping.dart';
 import '../tokens/token.dart' show Token;
 import '../tree/tree.dart' show Node;
 import 'source_file.dart';
 import 'source_information.dart';
 
 /// Source information that contains start source position and optionally an
 /// end source position.
 class StartEndSourceInformation extends SourceInformation {
@@ skipping 30 matching lines @@
   bool operator ==(other) {
     if (identical(this, other)) return true;
     if (other is! StartEndSourceInformation) return false;
     return startPosition == other.startPosition &&
         endPosition == other.endPosition;
   }
 
   // TODO(johnniwinther): Inline this in
   // [StartEndSourceInformationBuilder.buildDeclaration].
   static StartEndSourceInformation _computeSourceInformation(
-      AstElement element) {
-    AstElement implementation = element.implementation;
-    SourceFile sourceFile = implementation.compilationUnit.script.file;
-    String name = computeElementNameForSourceMaps(element);
-    Node node = implementation.node;
-    Token beginToken;
-    Token endToken;
-    if (node == null) {
+      ResolvedAst resolvedAst) {
+    String name = computeElementNameForSourceMaps(resolvedAst.element);
+    SourceFile sourceFile;
+    int begin;
+    int end;
+    if (resolvedAst.kind != ResolvedAstKind.PARSED) {
       // Synthesized node. Use the enclosing element for the location.
-      beginToken = endToken = element.position;
+      sourceFile = resolvedAst.element.compilationUnit.script.file;
+      begin = end = resolvedAst.element.sourcePosition.begin;
     } else {
-      beginToken = node.getBeginToken();
-      endToken = node.getEndToken();
+      AstElement implementation = resolvedAst.element.implementation;
+      sourceFile = implementation.compilationUnit.script.file;
+      Node node = resolvedAst.node;
+      begin = node.getBeginToken().charOffset;
+      end = node.getEndToken().charOffset;
     }
     // TODO(johnniwinther): find the right sourceFile here and remove offset
     // checks below.
     SourceLocation sourcePosition, endSourcePosition;
-    if (beginToken.charOffset < sourceFile.length) {
+    if (begin < sourceFile.length) {
       sourcePosition =
-          new OffsetSourceLocation(sourceFile, beginToken.charOffset, name);
+          new OffsetSourceLocation(sourceFile, begin, name);
     }
-    if (endToken.charOffset < sourceFile.length) {
-      endSourcePosition =
-          new OffsetSourceLocation(sourceFile, endToken.charOffset, name);
+    if (end < sourceFile.length) {
+      endSourcePosition = new OffsetSourceLocation(sourceFile, end, name);
     }
     return new StartEndSourceInformation(sourcePosition, endSourcePosition);
   }
 
   /// Create a textual representation of the source information using [uriText]
   /// as the Uri representation.
   String _computeText(String uriText) {
     StringBuffer sb = new StringBuffer();
     sb.write('$uriText:');
     // Use 1-based line/startPosition info to match usual dart tool output.
@@ skipping 57 matching lines @@
 
 /// [SourceInformationBuilder] that generates [PositionSourceInformation].
 class StartEndSourceInformationBuilder extends SourceInformationBuilder {
   final SourceFile sourceFile;
   final String name;
 
   StartEndSourceInformationBuilder(AstElement element)
       : sourceFile = element.compilationUnit.script.file,
         name = computeElementNameForSourceMaps(element);
 
-  SourceInformation buildDeclaration(AstElement element) {
-    return StartEndSourceInformation._computeSourceInformation(element);
+  SourceInformation buildDeclaration(ResolvedAst resolvedAst) {
+    return StartEndSourceInformation._computeSourceInformation(resolvedAst);
   }
 
   SourceLocation sourceFileLocationForToken(Token token) {
     SourceLocation location =
         new OffsetSourceLocation(sourceFile, token.charOffset, name);
     checkValidSourceFileLocation(location, sourceFile, token.charOffset);
     return location;
   }
 
   void checkValidSourceFileLocation(
@@ skipping 40 matching lines @@
 
   @override
   SourceInformation buildIf(Node node) => buildGeneric(node);
 
   @override
   SourceInformationBuilder forContext(AstElement element,
       {SourceInformation sourceInformation}) {
     return new StartEndSourceInformationBuilder(element);
   }
 }