Shell of implementation for embedded windows. At this point this is

aura/window.h

+// Copyright (c) 2011 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 AURA_WINDOW_H_
+#define AURA_WINDOW_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/rect.h"
+
+class SkCanvas;
+
+namespace ui {
+class Layer;
+}
+
+namespace aura {
+
+class Desktop;
+class WindowDelegate;
+
+// Aura window implementation. Interesting events are sent to the
+// WindowDelegate.
+class Window {
+ public:
+  enum Visibility {
+    // Don't display the window onscreen and don't let it receive mouse
+    // events. This is the default.
+    VISIBILITY_HIDDEN = 1,
+
+    // Display the window and let it receive mouse events.
+    VISIBILITY_SHOWN = 2,
+
+    // Display the window but prevent it from receiving mouse events.
+    VISIBILITY_SHOWN_NO_INPUT = 3,
+  };
+
+  explicit Window(Desktop* desktop);
+  ~Window();
+
+  void set_delegate(WindowDelegate* d) { delegate_ = d; }
+
+  // Changes the visbility of the window.
+  void SetVisibility(Visibility visibility);
+  Visibility visibility() const { return visibility_; }
+
+  // Changes the bounds of the window.
+  void SetBounds(const gfx::Rect& bounds, int anim_ms);
+  const gfx::Rect& bounds() const { return bounds_; }
+
+  // Marks the window as needing to be painted.
+  void SchedulePaint(const gfx::Rect& bounds);
+
+  // Sets the contents of the window.
+  void SetCanvas(const SkCanvas& canvas, const gfx::Point& origin);
+
+  // If the window is visible its layer is drawn.
+  void Draw();
+
+  // If SchedulePaint has been invoked on the Window the delegate is notified.
+  void UpdateLayerCanvas();
+
+ private:
+  // The desktop we're in.
+  Desktop* desktop_;
+
+  WindowDelegate* delegate_;
+
+  Visibility visibility_;
+
+  scoped_ptr<ui::Layer> layer_;
+
+  // Union of regions passed to SchedulePaint. Cleaned when UpdateLayerCanvas is
+  // invoked.
+  gfx::Rect dirty_rect_;
+
+  // If true UpdateLayerCanvas paints all. This is set when the window is first
+  // created to trigger painting the complete bounds.
+  bool needs_paint_all_;
+
+  // Bounds of the window in the desktop's coordinate system.
+  gfx::Rect bounds_;
+
+  DISALLOW_COPY_AND_ASSIGN(Window);
+};
+
+}  // namespace aura
+
+#endif  // AURA_WINDOW_H_