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ash / system / accessibility / floating_accessibility_controller.h [blame]

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef ASH_SYSTEM_ACCESSIBILITY_FLOATING_ACCESSIBILITY_CONTROLLER_H_
#define ASH_SYSTEM_ACCESSIBILITY_FLOATING_ACCESSIBILITY_CONTROLLER_H_

#include "ash/accessibility/accessibility_observer.h"
#include "ash/ash_export.h"
#include "ash/constants/ash_constants.h"
#include "ash/public/cpp/accessibility_controller_enums.h"
#include "ash/public/cpp/ash_constants.h"
#include "ash/system/accessibility/floating_accessibility_detailed_controller.h"
#include "ash/system/accessibility/floating_accessibility_view.h"
#include "ash/system/locale/locale_update_controller_impl.h"
#include "base/memory/raw_ptr.h"
#include "ui/display/display_observer.h"

namespace ash {

class AccessibilityController;
class FloatingAccessibilityView;

// Controls the floating accessibility menu.
class ASH_EXPORT FloatingAccessibilityController
    : public FloatingAccessibilityView::Delegate,
      public FloatingAccessibilityDetailedController::Delegate,
      public TrayBubbleView::Delegate,
      public LocaleChangeObserver,
      public AccessibilityObserver,
      public display::DisplayObserver {
 public:
  explicit FloatingAccessibilityController(
      AccessibilityController* accessibility_controller);
  FloatingAccessibilityController(const FloatingAccessibilityController&) =
      delete;
  FloatingAccessibilityController& operator=(
      const FloatingAccessibilityController&) = delete;
  ~FloatingAccessibilityController() override;

  // Starts showing the floating menu when called.
  void Show(FloatingMenuPosition position);
  void SetMenuPosition(FloatingMenuPosition new_position);

  // AccessibilityObserver:
  void OnAccessibilityStatusChanged() override;

  // display::DisplayObserver:
  void OnDisplayMetricsChanged(const display::Display& display,
                               uint32_t changed_metrics) override;

  // Focuses on the first element in the floating menu.
  void FocusOnMenu();

  FloatingAccessibilityBubbleView* bubble_view() { return bubble_view_; }

 private:
  friend class FloatingAccessibilityControllerTest;
  // FloatingAccessibilityView::Delegate:
  void OnDetailedMenuEnabled(bool enabled) override;
  void OnLayoutChanged() override;
  void OnFocused() override;
  void OnBlurred() override;
  // FloatingAccessibilityDetailedController::Delegate:
  void OnDetailedMenuClosed() override;
  views::Widget* GetBubbleWidget() override;
  // TrayBubbleView::Delegate:
  void BubbleViewDestroyed() override;
  std::u16string GetAccessibleNameForBubble() override;
  void HideBubble(const TrayBubbleView* bubble_view) override;
  void OnMouseEnteredView() override;
  void OnMouseExitedView() override;

  // LocaleChangeObserver:
  void OnLocaleChanged() override;

  void UpdateOpacity();

  raw_ptr<FloatingAccessibilityView> menu_view_ = nullptr;
  raw_ptr<FloatingAccessibilityBubbleView> bubble_view_ = nullptr;
  raw_ptr<views::Widget> bubble_widget_ = nullptr;

  bool detailed_view_shown_ = false;

  // Controller for the detailed view, exists only when visible.
  std::unique_ptr<FloatingAccessibilityDetailedController>
      detailed_menu_controller_;

  FloatingMenuPosition position_ = kDefaultFloatingMenuPosition;

  // Used in tests to notify on the menu layout change events.
  base::RepeatingClosure on_layout_change_;

  display::ScopedDisplayObserver display_observer_{this};

  const raw_ptr<AccessibilityController> accessibility_controller_;  // Owns us.
};

}  // namespace ash

#endif  // ASH_SYSTEM_ACCESSIBILITY_FLOATING_ACCESSIBILITY_CONTROLLER_H_