Material light and dark themes for Sky widgets

sky/sdk/lib/widgets/basic.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.
 
 import 'dart:sky' as sky;
 
 import 'package:vector_math/vector_math.dart';
 
 import '../painting/text_style.dart';
 import '../rendering/block.dart';
 import '../rendering/box.dart';
 import '../rendering/flex.dart';
 import '../rendering/object.dart';
 import '../rendering/paragraph.dart';
 import '../rendering/stack.dart';
+import 'default_text_style.dart';
 import 'widget.dart';
 
 export '../rendering/box.dart' show BoxConstraints, BoxDecoration, Border, BorderSide, EdgeDims;
 export '../rendering/flex.dart' show FlexDirection, FlexJustifyContent, FlexAlignItems;
 export '../rendering/object.dart' show Point, Size, Rect, Color, Paint, Path;
 export 'widget.dart' show Widget, Component, App, runApp, Listener, ParentDataNode;
 
 
 // PAINTING NODES
 
@@ skipping 377 matching lines @@
   }
 }
 
 class Text extends Component {
   Text(this.data, { String key, TextStyle this.style }) : super(key: key);
   final String data;
   final TextStyle style;
   bool get interchangeable => true;
   Widget build() {
     InlineBase text = new InlineText(data);
-    if (style != null) text = new InlineStyle(style, [text]);
+    TextStyle defaultStyle = DefaultTextStyle.of(this);
+    TextStyle combinedStyle;
+    if (defaultStyle != null) {
+      if (style != null)
+        combinedStyle = defaultStyle.merge(style);
+      else
+        combinedStyle = defaultStyle;
+    } else {
+      combinedStyle = style;      
+    }
+    if (combinedStyle != null)
+      text = new InlineStyle(combinedStyle, [text]);
     return new Inline(text: text);
   }
 }
 
 class Image extends LeafRenderObjectWrapper {
 
   Image({
     src,
     this.size
   }) : src = src,
@@ skipping 35 matching lines @@
   }
 
   void remove() {
     RenderObjectWrapper ancestor = findAncestor(RenderObjectWrapper);
     assert(ancestor is RenderObjectWrapper);
     ancestor.detachChildRoot(this);
     super.remove();
   }
 
 }