Better handling of large files.

dart/site/try/src/selection.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 trydart.selection;
 
 import 'dart:html' show
     CharacterData,
     Node,
     NodeFilter,
@@ skipping 17 matching lines @@
             isCollapsed(selection) ? selection.anchorOffset : -1;
 
   Text addNodeFromSubstring(int start,
                             int end,
                             List<Node> nodes,
                             [Decoration decoration]) {
     if (start == end) return null;
 
     Text textNode = new Text(text.substring(start, end));
 
-    if (start <= globalOffset && globalOffset < end) {
+    if (start <= globalOffset && globalOffset <= end) {
       anchorNode = textNode;
       anchorOffset = globalOffset - start;
     }
 
     nodes.add(decoration == null ? textNode : decoration.applyTo(textNode));
 
     return textNode;
   }
 
   void adjust(Selection selection) {
     if (anchorOffset >= 0) {
+      Stopwatch sw = new Stopwatch()..start();
       selection.collapse(anchorNode, anchorOffset);
+      sw.stop();
+      print('selection.collapse took ${sw.elapsedMilliseconds}ms');

[kasperl, 2014/05/06 04:51:06]

Sure you want to keep this in?

[ahe, 2014/05/06 12:54:02]

Removed.

     }
   }
 
   void updateText(String newText) {
     text = newText;
     globalOffset = computeGlobalOffset(root, anchorNode, anchorOffset);
   }
 
   /// Computes the global offset, that is, the offset from [root].
   static int computeGlobalOffset(Node root, Node anchorNode, int anchorOffset) {
@@ skipping 13 matching lines @@
 
     return -1;
   }
 }
 
 bool isCollapsed(Selection selection) {
   // Firefox and Chrome don't agree on if the selection is collapsed if there
   // is no node selected.
   return selection.isCollapsed && selection.anchorNode != null;
 }