Adds StyledText

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';
@@ skipping 362 matching lines @@
 
   final InlineBase text;
 
   void syncRenderObject(Widget old) {
     super.syncRenderObject(old);
     root.inline = text;
   }
 
 }
 
+class StyledText extends Component {
+  // elements ::= "string" | [<text-style> <elements>*]

[Hixie, 2015/06/18 22:32:24]

I think it'd be better to have this only support TextStyle objects. If you want
unstyled text, you'd just use Text().

+  // Where "string" is text to display and text-style is an instance of
+  // TextStyle. The text-style applies to all of the elements that follow.
+  StyledText({ this.elements, String key }) : super(key: key);
+
+  final dynamic elements;
+
+  InlineBase _toInline(dynamic element) {
+    if (element is String) {
+      return new InlineText(element);
+    }
+    if (element is Iterable && element.first is TextStyle) {
+      return new InlineStyle(element.first, element.skip(1).map(_toInline).toList());
+    }
+    throw new ArgumentError("invalid elements");
+  }
+
+  Widget build() {
+    return new Inline(text: _toInline(elements));
+  }
+}
+
 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]);
     return new Inline(text: text);
   }
@@ skipping 43 matching lines @@
   }
 
   void remove() {
     RenderObjectWrapper ancestor = findAncestor(RenderObjectWrapper);
     assert(ancestor is RenderObjectWrapper);
     ancestor.detachChildRoot(this);
     super.remove();
   }
 
 }