Syntax highlighting on the client.

utils/dartdoc/interact.dart

 // Copyright (c) 2011, 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.
 
 /** Provides client-side behavior for generated docs. */
 #library('interact');
 
 #import('dart:html');
+#import('../../frog/lang.dart');
+#import('markdown.dart', prefix: 'md');
+
+#source('classify.dart');
 
 main() {
   window.on.contentLoaded.add((e) {
     for (var elem in document.queryAll('.method, .field')) {
       var showCode = elem.query('.show-code');
 
       // Skip it if we don't have a code link. Will happen if source code is
       // disabled.
       if (showCode == null) continue;
 
       var pre = elem.query('pre.source');
       showCode.on.click.add((e) {
         if (pre.classes.contains('expanded')) {
           pre.classes.remove('expanded');
         } else {
+          // Syntax highlight.
+          if (!pre.classes.contains('formatted')) {
+            pre.innerHTML = classifySource(new SourceFile('', pre.text));
+            pre.classes.add('formatted');
+          };
           pre.classes.add('expanded');
         }
       });
     }
   });
-}
+}