Big merge from experimental to bleeding edge.

samples/swarm/swarm_ui_lib/view/MeasureText.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.
 
 part of view;
 
 // TODO(jacobr): handle splitting lines on symbols such as '-' that aren't
 // whitespace but are valid word breaking points.
 /**
  * Utility class to efficiently word break and measure text without requiring
@@ skipping 27 matching lines @@
   // full calculation.
   static bool isWhitespace(String character) {
     return character == ' ' || character == '\t' || character == '\n';
   }
 
   num get typicalCharLength {
     return _typicalCharLength;
   }
 
   String quickTruncate(String text, num lineWidth, int maxLines) {
-    int targetLength = (lineWidth * maxLines / _typicalCharLength).toInt();
+    int targetLength = lineWidth * maxLines ~/ _typicalCharLength;
     // Advance to next word break point.
     while(targetLength < text.length && !isWhitespace(text[targetLength])) {
       targetLength++;
     }
 
     if (targetLength < text.length) {
       return '${text.substring(0, targetLength)}$ELLIPSIS';
     } else {
       return text;
     }
@@ skipping 95 matching lines @@
       } else if (wordStartIndex == null && !whitespace) {
         wordStartIndex = i;
       }
       lastWhitespace = whitespace;
     }
     if (currentLength > 0) {
       callback(startIndex, text.length, currentLength);
     }
   }
 }