Reland: mash: Convert TrayBackgroundView to wm common types

ash/system/tray/tray_background_view.h

-// Copyright (c) 2012 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_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
-#define ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "ash/common/shelf/shelf_types.h"
-#include "ash/common/system/tray/actionable_view.h"
-#include "ash/common/wm/background_animator.h"
-#include "base/macros.h"
-#include "ui/compositor/layer_animation_observer.h"
-#include "ui/views/bubble/tray_bubble_view.h"
-
-namespace ash {
-class ShelfLayoutManager;
-class StatusAreaWidget;
-class TrayEventFilter;
-class TrayBackground;
-class WmShelf;
-
-// Base class for children of StatusAreaWidget: SystemTray, WebNotificationTray,
-// LogoutButtonTray, OverviewButtonTray.
-// This class handles setting and animating the background when the Launcher
-// his shown/hidden. It also inherits from ActionableView so that the tray
-// items can override PerformAction when clicked on.
-class ASH_EXPORT TrayBackgroundView : public ActionableView,
-                                      public BackgroundAnimatorDelegate,
-                                      public ui::ImplicitAnimationObserver {
- public:
-  static const char kViewClassName[];
-
-  // Base class for tray containers. Sets the border and layout. The container
-  // auto-resizes the widget when necessary.
-  class TrayContainer : public views::View {
-   public:
-    explicit TrayContainer(ShelfAlignment alignment);
-    ~TrayContainer() override {}
-
-    void SetAlignment(ShelfAlignment alignment);
-
-    void set_size(const gfx::Size& size) { size_ = size; }
-
-    // views::View:
-    gfx::Size GetPreferredSize() const override;
-
-   protected:
-    // views::View:
-    void ChildPreferredSizeChanged(views::View* child) override;
-    void ChildVisibilityChanged(View* child) override;
-    void ViewHierarchyChanged(
-        const ViewHierarchyChangedDetails& details) override;
-
-   private:
-    void UpdateLayout();
-
-    ShelfAlignment alignment_;
-    gfx::Size size_;
-
-    DISALLOW_COPY_AND_ASSIGN(TrayContainer);
-  };
-
-  explicit TrayBackgroundView(StatusAreaWidget* status_area_widget);
-  ~TrayBackgroundView() override;
-
-  // Called after the tray has been added to the widget containing it.
-  virtual void Initialize();
-
-  // Initializes animations for the bubble.
-  static void InitializeBubbleAnimations(views::Widget* bubble_widget);
-
-  // views::View:
-  void SetVisible(bool visible) override;
-  const char* GetClassName() const override;
-  void ChildPreferredSizeChanged(views::View* child) override;
-  void GetAccessibleState(ui::AXViewState* state) override;
-  void AboutToRequestFocusFromTabTraversal(bool reverse) override;
-
-  // ActionableView:
-  bool PerformAction(const ui::Event& event) override;
-  gfx::Rect GetFocusBounds() override;
-  void OnGestureEvent(ui::GestureEvent* event) override;
-
-  // BackgroundAnimatorDelegate:
-  void UpdateBackground(int alpha) override;
-
-  // Called whenever the shelf alignment changes.
-  virtual void SetShelfAlignment(ShelfAlignment alignment);
-
-  // Called when the anchor (tray or bubble) may have moved or changed.
-  virtual void AnchorUpdated() {}
-
-  // Called from GetAccessibleState, must return a valid accessible name.
-  virtual base::string16 GetAccessibleNameForTray() = 0;
-
-  // Called when the bubble is resized.
-  virtual void BubbleResized(const views::TrayBubbleView* bubble_view) {}
-
-  // Hides the bubble associated with |bubble_view|. Called when the widget
-  // is closed.
-  virtual void HideBubbleWithView(const views::TrayBubbleView* bubble_view) = 0;
-
-  // Called by the bubble wrapper when a click event occurs outside the bubble.
-  // May close the bubble.
-  virtual void ClickedOutsideBubble() = 0;
-
-  // Sets |contents| as a child.
-  void SetContents(views::View* contents);
-
-  // Creates and sets contents background to |background_|.
-  void SetContentsBackground();
-
-  // Returns the anchor rect for the bubble.
-  gfx::Rect GetBubbleAnchorRect(
-      views::Widget* anchor_widget,
-      views::TrayBubbleView::AnchorType anchor_type,
-      views::TrayBubbleView::AnchorAlignment anchor_alignment) const;
-
-  // Returns the bubble anchor alignment based on |shelf_alignment_|.
-  views::TrayBubbleView::AnchorAlignment GetAnchorAlignment() const;
-
-  // Forces the background to be drawn active if set to true.
-  void SetDrawBackgroundAsActive(bool visible);
-
-  // Returns true when the the background was overridden to be drawn as active.
-  bool draw_background_as_active() const {return draw_background_as_active_; }
-
-  StatusAreaWidget* status_area_widget() {
-    return status_area_widget_;
-  }
-  const StatusAreaWidget* status_area_widget() const {
-    return status_area_widget_;
-  }
-  TrayContainer* tray_container() const { return tray_container_; }
-  ShelfAlignment shelf_alignment() const { return shelf_alignment_; }
-  TrayEventFilter* tray_event_filter() { return tray_event_filter_.get(); }
-
-  WmShelf* GetShelf();
-
-  // Updates the arrow visibility based on the launcher visibility.
-  void UpdateBubbleViewArrow(views::TrayBubbleView* bubble_view);
-
- private:
-  class TrayWidgetObserver;
-
-  // Called from Initialize after all status area trays have been created.
-  // Sets the border based on the position of the view.
-  void SetTrayBorder();
-
-  // ui::ImplicitAnimationObserver:
-  void OnImplicitAnimationsCompleted() override;
-  bool RequiresNotificationWhenAnimatorDestroyed() const override;
-
-  // Applies transformations to the |layer()| to animate the view when
-  // SetVisible(false) is called.
-  void HideTransformation();
-
-  // Unowned pointer to parent widget.
-  StatusAreaWidget* status_area_widget_;
-
-  // Convenience pointer to the contents view.
-  TrayContainer* tray_container_;
-
-  // Shelf alignment.
-  // TODO(jamescook): Don't cache this, get it from WmShelf.
-  ShelfAlignment shelf_alignment_;
-
-  // Owned by the view passed to SetContents().
-  TrayBackground* background_;
-
-  // This variable stores the activation override which will tint the background
-  // differently if set to true.
-  bool draw_background_as_active_;
-
-  std::unique_ptr<TrayWidgetObserver> widget_observer_;
-  std::unique_ptr<TrayEventFilter> tray_event_filter_;
-
-  DISALLOW_COPY_AND_ASSIGN(TrayBackgroundView);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_