Split layout2.dart into several files

Previously layout2.dart was a thousand lines long.

R=ianh@google.com

Review URL: https://codereview.chromium.org/1161003002

examples/raw/render_paragraph.dart

@@ -4,7 +4,10 @@
 
 import 'dart:sky';
 import 'package:sky/framework/app.dart';
-import 'package:sky/framework/layout2.dart';
+import 'package:sky/framework/rendering/render_box.dart';
+import 'package:sky/framework/rendering/render_node.dart';
+import 'package:sky/framework/rendering/render_flex.dart';
+import 'package:sky/framework/rendering/render_paragraph.dart';
 
 class RenderSolidColor extends RenderDecoratedBox {
   final Size desiredSize;
@@ -15,7 +18,7 @@ class RenderSolidColor extends RenderDecoratedBox {
         super(decoration: new BoxDecoration(backgroundColor: backgroundColor));
 
   Size getIntrinsicDimensions(BoxConstraints constraints) {
-    return constraints.constrain(new Size(desiredWidth, desiredHeight));
+    return constraints.constrain(desiredSize);
   }
 
   void performLayout() {

examples/raw/sector_layout.dart

@@ -5,7 +5,8 @@
 import 'dart:math' as math;
 import 'dart:sky' as sky;
 import 'package:sky/framework/app.dart';
-import 'package:sky/framework/layout2.dart';
+import 'package:sky/framework/rendering/render_box.dart';
+import 'package:sky/framework/rendering/render_node.dart';
 
 const double kTwoPi = 2 * math.PI;
 

examples/raw/simple_render_tree.dart

@@ -1,87 +0,0 @@
-// 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:sky/framework/app.dart';
-import 'package:sky/framework/layout2.dart';
-
-class RenderSolidColor extends RenderDecoratedBox {
-  final sky.Size desiredSize;
-  final int backgroundColor;
-
-  RenderSolidColor(int backgroundColor, { this.desiredSize: const sky.Size.infinite() })
-      : backgroundColor = backgroundColor,
-        super(decoration: new BoxDecoration(backgroundColor: backgroundColor)) {
-  }
-
-  BoxDimensions getIntrinsicDimensions(BoxConstraints constraints) {
-    return new BoxDimensions.withConstraints(constraints,
-                                             width: desiredSize.width,
-                                             height: desiredSize.height);
-  }
-
-  void performLayout() {
-    size = constraints.constrain(desiredSize);
-  }
-
-  void handlePointer(sky.PointerEvent event) {
-    if (event.type == 'pointerdown')
-      decoration = new BoxDecoration(backgroundColor: 0xFFFF0000);
-    else if (event.type == 'pointerup')
-      decoration = new BoxDecoration(backgroundColor: backgroundColor);
-  }
-}
-
-AppView app;
-
-void main() {
-  RenderFlex flexRoot = new RenderFlex(direction: FlexDirection.Vertical);
-
-  RenderNode root = new RenderDecoratedBox(
-    decoration: new BoxDecoration(backgroundColor: 0xFF000000),
-    child: flexRoot
-  );
-
-  void addFlexChildSolidColor(RenderFlex parent, int backgroundColor, { int flex: 0 }) {
-    RenderNode child = new RenderSolidColor(backgroundColor);
-    parent.add(child);
-    child.parentData.flex = flex;
-  }
-
-  // Yellow bar at top
-  addFlexChildSolidColor(flexRoot, 0xFFFFFF00, flex: 1);
-
-  // Turquoise box
-  flexRoot.add(new RenderSolidColor(0x7700FFFF, desiredSize: new sky.Size(100.0, 100.0)));
-
-  // Green and cyan render block with padding
-  var renderBlock = new RenderBlock();
-
-  renderBlock.add(new RenderSolidColor(0xFF00FF00, desiredSize: new sky.Size(100.0, 50.0)));
-  renderBlock.add(new RenderSolidColor(0x7700FFFF, desiredSize: new sky.Size(50.0, 100.0)));
-
-  var renderDecoratedBlock = new RenderDecoratedBox(
-    decoration: new BoxDecoration(backgroundColor: 0xFFFFFFFF),
-    child: renderBlock
-  );
-
-  flexRoot.add(new RenderPadding(const EdgeDims(10.0, 10.0, 10.0, 10.0), renderDecoratedBlock));
-
-  var row = new RenderFlex(direction: FlexDirection.Horizontal);
-
-  // Purple and blue cells
-  addFlexChildSolidColor(row, 0x77FF00FF, flex: 1);
-  addFlexChildSolidColor(row, 0xFF0000FF, flex: 2);
-
-  var decoratedRow = new RenderDecoratedBox(
-    decoration: new BoxDecoration(backgroundColor: 0xFF333333),
-    child: row
-  );
-
-  flexRoot.add(decoratedRow);
-  decoratedRow.parentData.flex = 3;
-
-  app = new AppView(root);
-
-}

examples/raw/touch_demo.dart

@@ -5,7 +5,8 @@
 import 'dart:math';
 import 'dart:sky';
 import 'package:sky/framework/app.dart';
-import 'package:sky/framework/layout2.dart';
+import 'package:sky/framework/rendering/render_box.dart';
+import 'package:sky/framework/rendering/render_node.dart';
 
 // Material design colors. :p
 List<int> colors = [

examples/stocks2/lib/stock_app.dart

@@ -23,7 +23,6 @@ import 'stock_data.dart';
 // import 'stock_menu.dart';
 
 import 'dart:async';
-import 'package:sky/framework/layout2.dart';
 
 enum StockMode { Optimistic, Pessimistic }
 

examples/stocks2/lib/stock_arrow.dart

@@ -4,7 +4,6 @@
 
 import 'dart:math';
 import 'package:sky/framework/fn2.dart';
-import 'package:sky/framework/layout2.dart';
 
 class StockArrow extends Component {
   static final Style _style = new Style('''

examples/stocks2/lib/stock_menu.dart

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:sky/framework/fn2.dart';
-import 'package:sky/framework/layout2.dart';
 import 'package:sky/framework/components2/popup_menu.dart';
 import 'package:sky/framework/components2/checkbox.dart';
 import 'package:sky/framework/theme/view_configuration.dart';

examples/stocks2/lib/stock_row.dart

@@ -4,7 +4,6 @@
 
 import 'package:sky/framework/components2/ink_well.dart';
 import 'package:sky/framework/fn2.dart';
-import 'package:sky/framework/layout2.dart';
 import 'package:sky/framework/theme/typography.dart' as typography;
 import 'stock_arrow.dart';
 import 'stock_data.dart';