1 // Copyright 2020 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef ASH_SYSTEM_ACCESSIBILITY_FLOATING_ACCESSIBILITY_CONTROLLER_H_
6 #define ASH_SYSTEM_ACCESSIBILITY_FLOATING_ACCESSIBILITY_CONTROLLER_H_
7 
8 #include "ash/accessibility/accessibility_observer.h"
9 #include "ash/ash_export.h"
10 #include "ash/public/cpp/accessibility_controller_enums.h"
11 #include "ash/public/cpp/ash_constants.h"
12 #include "ash/system/accessibility/floating_accessibility_detailed_controller.h"
13 #include "ash/system/accessibility/floating_accessibility_view.h"
14 #include "ash/system/locale/locale_update_controller_impl.h"
15 
16 namespace ash {
17 
18 class AccessibilityControllerImpl;
19 class FloatingAccessibilityView;
20 
21 // Controls the floating accessibility menu.
22 class ASH_EXPORT FloatingAccessibilityController
23     : public FloatingAccessibilityView::Delegate,
24       public FloatingAccessibilityDetailedController::Delegate,
25       public TrayBubbleView::Delegate,
26       public LocaleChangeObserver,
27       public AccessibilityObserver {
28  public:
29   explicit FloatingAccessibilityController(
30       AccessibilityControllerImpl* accessibility_controller);
31   FloatingAccessibilityController(const FloatingAccessibilityController&) =
32       delete;
33   FloatingAccessibilityController& operator=(
34       const FloatingAccessibilityController&) = delete;
35   ~FloatingAccessibilityController() override;
36 
37   // Starts showing the floating menu when called.
38   void Show(FloatingMenuPosition position);
39   void SetMenuPosition(FloatingMenuPosition new_position);
40 
41   // AccessibilityObserver:
42   void OnAccessibilityStatusChanged() override;
43 
44   // Focuses on the first element in the floating menu.
45   void FocusOnMenu();
46 
47  private:
48   friend class FloatingAccessibilityControllerTest;
49   // FloatingAccessibilityView::Delegate:
50   void OnDetailedMenuEnabled(bool enabled) override;
51   void OnLayoutChanged() override;
52   // FloatingAccessibilityDetailedController::Delegate:
53   void OnDetailedMenuClosed() override;
54   views::Widget* GetBubbleWidget() override;
55   // TrayBubbleView::Delegate:
56   void BubbleViewDestroyed() override;
57   base::string16 GetAccessibleNameForBubble() override;
58   // LocaleChangeObserver:
59   void OnLocaleChanged() override;
60 
61   FloatingAccessibilityView* menu_view_ = nullptr;
62   FloatingAccessibilityBubbleView* bubble_view_ = nullptr;
63   views::Widget* bubble_widget_ = nullptr;
64 
65   bool detailed_view_shown_ = false;
66 
67   // Controller for the detailed view, exists only when visible.
68   std::unique_ptr<FloatingAccessibilityDetailedController>
69       detailed_menu_controller_;
70 
71   FloatingMenuPosition position_ = kDefaultFloatingMenuPosition;
72 
73   // Used in tests to notify on the menu layout change events.
74   base::RepeatingClosure on_layout_change_;
75 
76   AccessibilityControllerImpl* const accessibility_controller_;  // Owns us.
77 };
78 
79 }  // namespace ash
80 
81 #endif  // ASH_SYSTEM_ACCESSIBILITY_FLOATING_ACCESSIBILITY_CONTROLLER_H_
82