Experimental alignment layout manager using a property on the views

ui/views/fill_attribute.h

+// Copyright (c) 2016 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.
+
+#ifndef UI_VIEWS_FILL_ATTRIBUTE_H_
+#define UI_VIEWS_FILL_ATTRIBUTE_H_
+
+#include "ui/views/attributes.h"
+
+namespace views {
+
+enum class Fill {
+  // Align view to the left of the parent's content bounds, expanding the
+  // height to vertically fill the parent, minus the height any previously
+  // Top or Bottom aligned views.
+  Left,
+  // Align view to the top of the parent's content bounds, exanding the width
+  // horizontally to fill the parent.
+  Top,
+  // Align view to the right of the parent's content bounds, expanding the
+  // height to vertically fill the parent, minus the height any previously
+  // Top or Bottom aligned views.
+  Right,
+  // Align view to the bottom of the parent's content bounds, expanding the
+  // width horizontally to fill the parent.
+  Bottom,
+  // Align view to the parent's content bounds, expanding the width and
+  // height to fill the parent content/client area, minus any edge (Top,
+  // Bottom, Left, Right) filled views.
+  Content,
+};
+
+class VIEWS_EXPORT FillAttribute : public CustomAttribute<Fill> {
+ public:
+  FillAttribute(Fill fill) : CustomAttribute<Fill>(fill) {}
+  inline Fill fill() { return GetContent(); }
+  AttributeId Identity() const override;
+  void SetFill(Fill fill);
+};
+
+REGISTER_ATTRIBUTE_ID(CustomAttribute<Fill>);
+REGISTER_ATTRIBUTE_ID(FillAttribute);
+
+} // namespace views
+
+#endif // UI_VIEWS_FILL_ATTRIBUTE_H_
+