Aggregate CSS manipulation functions in html lib.

sdk/lib/html/html_common/css_class_set.dart

 // Copyright (c) 2012, 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 html;
+part of html_common;
 
-abstract class CssClassSet implements Set<String> {
+abstract class CssClassSetImpl implements CssClassSet {
 
   String toString() {
     return readClasses().join(' ');
   }
 
   /**
    * Adds the class [value] to the element if it is not on it, removes it if it
    * is.
    */
   bool toggle(String value) {
@@ skipping 61 matching lines @@
 
   /**
    * Add the class [value] to element.
    *
    * This is the Dart equivalent of jQuery's
    * [addClass](http://api.jquery.com/addClass/).
    */
   void add(String value) {
     // TODO - figure out if we need to do any validation here
     // or if the browser natively does enough.
-    _modify((s) => s.add(value));
+    modify((s) => s.add(value));
   }
 
   /**
    * Remove the class [value] from element, and return true on successful
    * removal.
    *
    * This is the Dart equivalent of jQuery's
    * [removeClass](http://api.jquery.com/removeClass/).
    */
   bool remove(Object value) {
     if (value is! String) return false;
     Set<String> s = readClasses();
     bool result = s.remove(value);
     writeClasses(s);
     return result;
   }
 
   /**
    * Add all classes specified in [iterable] to element.
    *
    * This is the Dart equivalent of jQuery's
    * [addClass](http://api.jquery.com/addClass/).
    */
   void addAll(Iterable<String> iterable) {
     // TODO - see comment above about validation.
-    _modify((s) => s.addAll(iterable));
+    modify((s) => s.addAll(iterable));
   }
 
   /**
    * Remove all classes specified in [iterable] from element.
    *
    * This is the Dart equivalent of jQuery's
    * [removeClass](http://api.jquery.com/removeClass/).
    */
   void removeAll(Iterable<String> iterable) {
-    _modify((s) => s.removeAll(iterable));
+    modify((s) => s.removeAll(iterable));
   }
 
   /**
    * Toggles all classes specified in [iterable] on element.
    *
    * Iterate through [iterable]'s items, and add it if it is not on it, or
    * remove it if it is. This is the Dart equivalent of jQuery's
    * [toggleClass](http://api.jquery.com/toggleClass/).
    */
   void toggleAll(Iterable<String> iterable) {
     iterable.forEach(toggle);
   }
 
   void retainAll(Iterable<String> iterable) {
-    _modify((s) => s.retainAll(iterable));
+    modify((s) => s.retainAll(iterable));
   }
 
   void removeWhere(bool test(String name)) {
-    _modify((s) => s.removeWhere(test));
+    modify((s) => s.removeWhere(test));
   }
 
   void retainWhere(bool test(String name)) {
-    _modify((s) => s.retainWhere(test));
+    modify((s) => s.retainWhere(test));
   }
 
   bool containsAll(Iterable<String> collection) =>
     readClasses().containsAll(collection);
 
   Set<String> intersection(Set<String> other) =>
     readClasses().intersection(other);
 
   Set<String> union(Set<String> other) =>
     readClasses().union(other);
@@ skipping 15 matching lines @@
       readClasses().skipWhile(test);
   String firstWhere(bool test(String value), { String orElse() }) =>
       readClasses().firstWhere(test, orElse: orElse);
   String lastWhere(bool test(String value), {String orElse()}) =>
       readClasses().lastWhere(test, orElse: orElse);
   String singleWhere(bool test(String value)) =>
       readClasses().singleWhere(test);
   String elementAt(int index) => readClasses().elementAt(index);
 
   void clear() {
-    _modify((s) => s.clear());
+    modify((s) => s.clear());
   }
   // interface Set - END
 
   /**
    * Helper method used to modify the set of css classes on this element.
    *
    *   f - callback with:
    *   s - a Set of all the css class name currently on this element.
    *
    *   After f returns, the modified set is written to the
    *       className property of this element.
    */
-  void _modify( f(Set<String> s)) {
+  void modify( f(Set<String> s)) {
     Set<String> s = readClasses();
     f(s);
     writeClasses(s);
   }
 
   /**
    * Read the class names from the Element class property,
    * and put them into a set (duplicates are discarded).
    * This is intended to be overridden by specific implementations.
    */
   Set<String> readClasses();
 
   /**
    * Join all the elements of a set into one string and write
    * back to the element.
    * This is intended to be overridden by specific implementations.
    */
   void writeClasses(Set<String> s);
 }