Make camelcasing use a regular expression for CSS properties.

tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate

 
 // 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.
 
 // WARNING: DO NOT EDIT THIS TEMPLATE FILE.
 // The template file was generated by scripts/css_code_generator.py
 
 // Source of CSS properties:
 //   CSSPropertyNames.in
@@ skipping 57 matching lines @@
   @DomName('CSSStyleDeclaration.setProperty')
   void setProperty(String propertyName, String value, [String priority]) {
     if (_supportsProperty(_camelCase(propertyName))) {
       return _setPropertyHelper(propertyName, value, priority);
     } else {
       return _setPropertyHelper(Device.cssPrefix + propertyName, value,
           priority);
     }
   }
 
   String _camelCase(String hyphenated) {

[sra1, 2014/08/07 22:16:20]

static

-    bool firstWord = true;
-    return hyphenated.splitMapJoin('-', onMatch : (_) => '',
-        onNonMatch : (String word) {
-      if (word.length > 0) {
-        if (firstWord) {
-          firstWord = false;
-          return word;
-        }
-        return word[0].toUpperCase() + word.substring(1);
-      }
-      return '';
-    });
+    // The "ms" prefix is always lowercased.
+    return hyphenated.replaceFirst(new RegExp('^-ms-'), 'ms-').replaceAllMapped(
+        new RegExp('-([a-z]+)', caseSensitive: false),

[sra1, 2014/08/07 21:46:38]

Put the regexps in private static fields to avoid recompiling them each time.

+        (match) => match[0][1].toUpperCase() + match[0].substring(2));
   }
 
 $if DART2JS
   void _setPropertyHelper(String propertyName, String value, [String priority]) {
     // try/catch for IE9 which throws on unsupported values.
     try {
       if (value == null) value = '';
       if (priority == null) {
         priority = '';
       }
@@ skipping 3132 matching lines @@
 
   /** Gets the value of "zoom" */
   String get zoom =>
     getPropertyValue('zoom');
 
   /** Sets the value of "zoom" */
   void set zoom(String value) {
     setProperty('zoom', value, '');
   }
 }