CrOS Tablet Window management - Split Screen part I

ash/wm/overview/scoped_transform_overview_window.h

 // Copyright 2013 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 ASH_WM_OVERVIEW_SCOPED_TRANSFORM_OVERVIEW_WINDOW_H_
 #define ASH_WM_OVERVIEW_SCOPED_TRANSFORM_OVERVIEW_WINDOW_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 16 matching lines @@
 class Rect;
 }
 
 namespace views {
 class Widget;
 }
 
 namespace ash {
 
 class ScopedOverviewAnimationSettings;
+class WindowSelectorItem;
 
 // Manages a window, and its transient children, in the overview mode. This
 // class allows transforming the windows with a helper to determine the best
 // fit in certain bounds. The window's state is restored when this object is
 // destroyed.
 class ASH_EXPORT ScopedTransformOverviewWindow : public ui::EventHandler {
  public:
   class OverviewContentMask;
   using ScopedAnimationSettings =
       std::vector<std::unique_ptr<ScopedOverviewAnimationSettings>>;
@@ skipping 11 matching lines @@
   // |title_height| tall in the transformed window.
   static gfx::Rect ShrinkRectToFitPreservingAspectRatio(const gfx::Rect& rect,
                                                         const gfx::Rect& bounds,
                                                         int top_view_inset,
                                                         int title_height);
 
   // Returns the transform turning |src_rect| into |dst_rect|.
   static gfx::Transform GetTransformForRect(const gfx::Rect& src_rect,
                                             const gfx::Rect& dst_rect);
 
-  explicit ScopedTransformOverviewWindow(aura::Window* window);
+  ScopedTransformOverviewWindow(WindowSelectorItem* selector_item,
+                                aura::Window* window);
   ~ScopedTransformOverviewWindow() override;
 
   // Starts an animation sequence which will use animation settings specified by
   // |animation_type|. The |animation_settings| container is populated with
   // scoped entities and the container should be destroyed at the end of the
   // animation sequence.
   //
   // Example:
   //  ScopedTransformOverviewWindow overview_window(window);
   //  ScopedTransformOverviewWindow::ScopedAnimationSettings scoped_settings;
@@ skipping 79 matching lines @@
   friend class WindowSelectorTest;
 
   // Closes the window managed by |this|.
   void CloseWidget();
 
   void CreateMirrorWindowForMinimizedState();
 
   // Makes Close() execute synchronously when used in tests.
   static void SetImmediateCloseForTests();
 
+  // A weak pointer to the window selector item that owns the transform window.
+  WindowSelectorItem* selector_item_;
+
   // A weak pointer to the real window in the overview.
   aura::Window* window_;
 
   // Original |window_|'s shape, if it was set on the window.
   std::unique_ptr<SkRegion> original_window_shape_;
 
   // True after the |original_window_shape_| has been set or after it has
   // been determined that window shape was not originally set on the |window_|.
   bool determined_original_window_shape_;
 
@@ skipping 13 matching lines @@
   std::unique_ptr<views::Widget> minimized_widget_;
 
   base::WeakPtrFactory<ScopedTransformOverviewWindow> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedTransformOverviewWindow);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_OVERVIEW_SCOPED_TRANSFORM_OVERVIEW_WINDOW_H_