components: Add Exosphere component.

components/exo/shell_surface.h

+// 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.
+
+#ifndef COMPONENTS_EXO_SHELL_SURFACE_H_
+#define COMPONENTS_EXO_SHELL_SURFACE_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/exo/surface_delegate.h"
+#include "ui/views/widget/widget_delegate.h"
+
+namespace base {
+namespace trace_event {
+class TracedValue;
+}
+}
+
+namespace exo {
+class Surface;
+
+// This class provides functions for treating a surfaces like toplevel,
+// fullscreen or popup widgets, move, resize or maximize them, associate
+// metadata like title and class, etc.
+class ShellSurface : public SurfaceDelegate, public views::WidgetDelegate {
+ public:
+  explicit ShellSurface(Surface* surface);
+  ~ShellSurface() override;
+
+  // Make the surface fullscreen.
+  void SetFullscreen(bool fullscreen);
+
+  // Set title for surface.
+  void SetTitle(const std::string& title);
+
+  // Returns a trace value representing the state of the surface.
+  scoped_refptr<base::trace_event::TracedValue> AsTracedValue() const;
+
+  // Overridden from SurfaceDelegate:
+  void OnSurfaceDestroying() override;
+  void OnSurfaceCommit() override;
+
+  // Overridden from views::WidgetDelegate:
+  std::string GetWindowName() const override;
+  views::Widget* GetWidget() override;
+  const views::Widget* GetWidget() const override;
+  views::View* GetContentsView() override;
+
+ private:
+  scoped_ptr<views::Widget> widget_;
+  Surface* surface_;
+  ui::WindowShowState show_state_;
+  std::string title_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShellSurface);
+};
+
+}  // namespace exo
+
+#endif  // COMPONENTS_EXO_SHELL_SURFACE_H_