Implement measurement using futures

client/html/src/Element.dart

Index: client/html/src/Element.dart
diff --git a/client/html/src/Element.dart b/client/html/src/Element.dart
index 1bd6383ef7e8d1526c091073838d2a65c9e8bbb0..b91104a6507a944903c0991c200927435664f793 100644
--- a/client/html/src/Element.dart
+++ b/client/html/src/Element.dart
@@ -69,6 +69,18 @@ interface ElementEvents extends Events {
   EventListenerList get fullscreenChange();
 }
 
+/**
+ * All your element measurement needs in one place
+ */
+interface ElementRect {
+  ClientRect get client();
+  ClientRect get offset();
+  ClientRect get scroll();
+  ClientRect get bounding();
+  List<ClientRect> get clientRects();
+}
+
+
 interface Element extends Node /*, common.NodeSelector, common.ElementTraversal */
     factory ElementWrappingImplementation {
 
@@ -91,14 +103,6 @@ interface Element extends Node /*, common.NodeSelector, common.ElementTraversal
   Map<String, String> get dataAttributes();
   void set dataAttributes(Map<String, String> value);
 
-  int get clientHeight();
-
-  int get clientLeft();
-
-  int get clientTop();
-
-  int get clientWidth();
-
   String get contentEditable();
 
   void set contentEditable(String value);
@@ -135,32 +139,16 @@ interface Element extends Node /*, common.NodeSelector, common.ElementTraversal
 
   Element get nextElementSibling();
 
-  int get offsetHeight();
-
-  int get offsetLeft();
-
   Element get offsetParent();
 
-  int get offsetTop();
-
-  int get offsetWidth();
-
   String get outerHTML();
 
   Element get previousElementSibling();
 
-  int get scrollHeight();
-
-  int get scrollLeft();
-
   void set scrollLeft(int value);
 
-  int get scrollTop();
-
   void set scrollTop(int value);
 
-  int get scrollWidth();
-
   bool get spellcheck();
 
   void set spellcheck(bool value);
@@ -185,10 +173,6 @@ interface Element extends Node /*, common.NodeSelector, common.ElementTraversal
 
   void focus();
 
-  ClientRect getBoundingClientRect();
-
-  List<ClientRect> getClientRects();
-
   Element insertAdjacentElement([String where, Element element]);
 
   void insertAdjacentHTML([String position_OR_where, String text]);
@@ -209,5 +193,11 @@ interface Element extends Node /*, common.NodeSelector, common.ElementTraversal
 
   bool matchesSelector([String selectors]);
 
+  Future<ElementRect> get rect();
+
+  Future<CSSStyleDeclaration> get computedStyle();
+
+  Future<CSSStyleDeclaration> getComputedStyle(String pseudoElement);
+
   ElementEvents get on();
 }