Provide cross-browser Rects for box model dimensions for Elements.

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

 // 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 $LIBRARYNAME;
 
 class _ChildrenElementList extends ListBase<Element> {
   // Raw Element.
   final Element _element;
   final HtmlCollection _childElements;
@@ skipping 121 matching lines @@
   }
 
   Element get single {
     if (length > 1) throw new StateError("More than one element");
     return first;
   }
 }
 
 /** 
  * An immutable list containing HTML elements. This list contains some
- * additional methods for ease of CSS manipulation on a group of elements.
+ * additional methods when compared to regular lists for ease of CSS 
+ * manipulation on a group of elements.
  */
 abstract class ElementList<T extends Element> extends ListBase<T> {
   /**
    * The union of all CSS classes applied to the elements in this list.
    *
    * This set makes it easy to add, remove or toggle (add if not present, remove
    * if present) the classes applied to a collection of elements.
    *
    *     htmlList.classes.add('selected');
    *     htmlList.classes.toggle('isOnline');
    *     htmlList.classes.remove('selected');
    */
   CssClassSet get classes;
 
   /** Replace the classes with `value` for every element in this list. */
   set classes(Iterable<String> value);
+
+  /**
+   * Access dimensions and position of the first Element's content in this list.
+   * 
+   * Setting the height or width properties will set the height or width
+   * property for all elements in the list. This returns a rectangle with the 
+   * dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not.
+   */
+  CssRect get contentEdge;
+  
+  /**
+   * Access dimensions and position of the first Element's content + padding box 
+   * in this list.
+   * 
+   * This returns a rectangle with the dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not. This
+   * can be used to retrieve jQuery's `innerHeight` value for an element. This
+   * is also a rectangle equalling the dimensions of clientHeight and
+   * clientWidth.
+   */
+  CssRect get paddingEdge;
+
+  /**
+   * Access dimensions and position of the first Element's content + padding +
+   * border box in this list.
+   * 
+   * This returns a rectangle with the dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not. This
+   * can be used to retrieve jQuery's `outerHeight` value for an element.
+   */
+  CssRect get borderEdge;
+
+  /**
+   * Access dimensions and position of the first Element's content + padding +
+   * border + margin box in this list.
+   * 
+   * This returns a rectangle with the dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not. This
+   * can be used to retrieve jQuery's `outerHeight` value for an element.
+   */
+  CssRect get marginEdge;
 }
 
 // TODO(jacobr): this is an inefficient implementation but it is hard to see
 // a better option given that we cannot quite force NodeList to be an
 // ElementList as there are valid cases where a NodeList JavaScript object
 // contains Node objects that are not Elements.
 class _FrozenElementList<T extends Element> extends ListBase<T> implements ElementList {
   final List<Node> _nodeList;
+  // The subset of _nodeList that are Elements.
+  List<Element> _elementList;
 
-  _FrozenElementList._wrap(this._nodeList);
+  _FrozenElementList._wrap(this._nodeList) {
+    _elementList = _nodeList.where((e) => e is Element);
+  }
 
   int get length => _nodeList.length;
 
   Element operator [](int index) => _nodeList[index];
 
   void operator []=(int index, Element value) {
     throw new UnsupportedError('Cannot modify list');
   }
 
   void set length(int newLength) {
     throw new UnsupportedError('Cannot modify list');
   }
 
   void sort([Comparator<Element> compare]) {
     throw new UnsupportedError('Cannot sort list');
   }
 
   Element get first => _nodeList.first;
 
   Element get last => _nodeList.last;
 
   Element get single => _nodeList.single;
 
-  CssClassSet get classes => new _MultiElementCssClassSet(
-      _nodeList.where((e) => e is Element));
+  CssClassSet get classes => new _MultiElementCssClassSet(_elementList);
 
   void set classes(Iterable<String> value) {
-    _nodeList.where((e) => e is Element).forEach((e) => e.classes = value);
+    _elementList.forEach((e) => e.classes = value);
   }
+
+  /**
+   * Access this element's content position.
+   * 
+   * This returns a rectangle with the dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not.
+   */
+  CssRect get contentEdge => new _ContentCssListRect(_elementList);
+  
+  /**
+   * Access the dimensions and position of this element's content + padding box.
+   * 
+   * This returns a rectangle with the dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not. This
+   * can be used to retrieve jQuery's `innerHeight` value for an element. This
+   * is also a rectangle equalling the dimensions of clientHeight and
+   * clientWidth.
+   */
+  CssRect get paddingEdge => _elementList.first.paddingEdge;
+
+  /**
+   * Access the dimensions and position of this element's content + padding +
+   * border box.
+   * 
+   * This returns a rectangle with the dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not. This
+   * can be used to retrieve jQuery's `outerHeight` value for an element.
+   */
+  CssRect get borderEdge => _elementList.first.borderEdge;
+
+  /**
+   * Access the dimensions and position of this element's content + padding +
+   * border + margin box.
+   * 
+   * This returns a rectangle with the dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not. This
+   * can be used to retrieve jQuery's `outerHeight` value for an element.
+   */
+  CssRect get marginEdge => _elementList.first.marginEdge;
 }
 
 /**
  * An abstract class, which all HTML elements extend.
  */
 $(ANNOTATIONS)abstract class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 
   /**
    * Creates an HTML element from a valid fragment of HTML.
    *
@@ skipping 410 matching lines @@
     } else if (JS('bool', '!!#.mozMatchesSelector', this)) {
       return JS('bool', '#.mozMatchesSelector(#)', this, selectors);
     } else if (JS('bool', '!!#.msMatchesSelector', this)) {
       return JS('bool', '#.msMatchesSelector(#)', this, selectors);
     }
     throw new UnsupportedError("Not supported on this platform");
   }
 $else
 $endif
 
+  /**
+   * Access this element's content position.
+   * 
+   * This returns a rectangle with the dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not.
+   */
+  CssRect get contentEdge => new _ContentCssRect(this);
+  
+  /**
+   * Access the dimensions and position of this element's content + padding box.
+   * 
+   * This returns a rectangle with the dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not. This
+   * can be used to retrieve jQuery's `innerHeight` value for an element. This
+   * is also a rectangle equalling the dimensions of clientHeight and
+   * clientWidth.
+   */
+  CssRect get paddingEdge => new _PaddingCssRect(this);
+
+  /**
+   * Access the dimensions and position of this element's content + padding +
+   * border box.
+   * 
+   * This returns a rectangle with the dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not. This
+   * can be used to retrieve jQuery's `outerHeight` value for an element.
+   */
+  CssRect get borderEdge => new _BorderCssRect(this);
+
+  /**
+   * Access the dimensions and position of this element's content + padding +
+   * border + margin box.
+   * 
+   * This returns a rectangle with the dimenions actually available for content
+   * in this element, in pixels, regardless of this element's box-sizing 
+   * property. Unlike [getBoundingClientRect], the dimensions of this rectangle
+   * will return the same numerical height if the element is hidden or not. This
+   * can be used to retrieve jQuery's `outerHeight` value for an element.
+   */
+  CssRect get marginEdge => new _MarginCssRect(this);
 $!MEMBERS
 }
 
 final _START_TAG_REGEXP = new RegExp('<(\\w+)');
 class _ElementFactoryProvider {
   static const _CUSTOM_PARENT_TAG_MAP = const {
     'body' : 'html',
     'head' : 'html',
     'caption' : 'table',
     'td': 'tr',
@@ skipping 139 matching lines @@
   const ScrollAlignment._internal(this._value);
   toString() => 'ScrollAlignment.$_value';
 
   /// Attempt to align the element to the top of the scrollable area.
   static const TOP = const ScrollAlignment._internal('TOP');
   /// Attempt to center the element in the scrollable area.
   static const CENTER = const ScrollAlignment._internal('CENTER');
   /// Attempt to align the element to the bottom of the scrollable area.
   static const BOTTOM = const ScrollAlignment._internal('BOTTOM');
 }