Implement RenderImage and Image for Sky

sky/sdk/lib/framework/fn2.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 library fn;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:mirrors';
 import 'dart:sky' as sky;
 import 'reflect.dart' as reflect;
 import 'app.dart';
 import 'rendering/block.dart';
 import 'rendering/box.dart';
 import 'rendering/flex.dart';
+import 'rendering/image.dart';
 import 'rendering/node.dart';
 import 'rendering/paragraph.dart';
 
 // final sky.Tracing _tracing = sky.window.tracing;
 
 final bool _shouldLogRenderDuration = false;
 final bool _shouldTrace = false;
 
 enum _SyncOperation { IDENTICAL, INSERTION, STATEFUL, STATELESS, REMOVAL }
 
@@ skipping 580 matching lines @@
     root.direction = direction;
   }
 }
 
 class FlexExpandingChild extends ParentDataNode {
   FlexExpandingChild(UINode content, [int flex = 1])
     : super(content, new FlexBoxParentData()..flex = flex);
 }
 
 class Image extends RenderNodeWrapper {
-  RenderCSSImage root;
-  RenderCSSImage createNode() => new RenderCSSImage(this, this.src, this.width, this.height);
+  RenderImage root;
+  RenderImage createNode() => new RenderImage(this.src, this.width, this.height);
+
+  static final Image _emptyImage = new Image();
+
+  RenderNodeWrapper get emptyNode => _emptyImage;
 
   final String src;
-  final int width;
-  final int height;
+  final double width;
+  final double height;

[abarth-chromium, 2015/06/03 00:16:31]

These should be held as a sky.Size not separately as width and height.

[jackson, 2015/06/03 17:41:43]

Done.

 
   Image({
     Object key,
     this.width,
     this.height,
     this.src
   }) : super(key: key);
 
   void syncRenderNode(UINode old) {
     super.syncRenderNode(old);
@@ skipping 287 matching lines @@
     assert(root.parent is RenderView);
   }
 }
 
 class Text extends Component {
   Text(this.data) : super(key: '*text*');
   final String data;
   bool get interchangeable => true;
   UINode build() => new Paragraph(text: data);
 }