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// Copyright 2018 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.
// Copied with modifications from ash/accessibility, refactored for use in
// chromecast.
#ifndef CHROMECAST_BROWSER_ACCESSIBILITY_TOUCH_EXPLORATION_MANAGER_H_
#define CHROMECAST_BROWSER_ACCESSIBILITY_TOUCH_EXPLORATION_MANAGER_H_
#include "chromecast/browser/accessibility/accessibility_sound_delegate.h"
#include "chromecast/browser/accessibility/touch_exploration_controller.h"
#include "chromecast/graphics/accessibility/accessibility_focus_ring_controller.h"
#include "ui/events/event_rewriter.h"
#include "ui/wm/public/activation_change_observer.h"
#include "ui/wm/public/activation_client.h"
namespace chromecast {
namespace shell {
// Responsible for initializing TouchExplorationController when spoken feedback
// is on. Implements TouchExplorationControllerDelegate which allows touch
// gestures to manipulate the system.
class TouchExplorationManager : public ui::EventRewriter,
public TouchExplorationControllerDelegate,
public ::wm::ActivationChangeObserver {
public:
TouchExplorationManager(
aura::Window* root_window,
wm::ActivationClient* activation_client,
AccessibilityFocusRingController* accessibility_focus_ring_controller);
~TouchExplorationManager() override;
// Enable or disable touch exploration.
// (In the Chrome version this is handled as an AccessibilityObserver.)
void Enable(bool enabled);
// ui::EventRewriter overrides:
ui::EventRewriteStatus RewriteEvent(
const ui::Event& event,
std::unique_ptr<ui::Event>* rewritten_event) override;
ui::EventRewriteStatus NextDispatchEvent(
const ui::Event& last_event,
std::unique_ptr<ui::Event>* new_event) override;
// TouchExplorationControllerDelegate overrides:
void HandleAccessibilityGesture(ax::mojom::Gesture gesture) override;
// wm::ActivationChangeObserver overrides:
void OnWindowActivated(
::wm::ActivationChangeObserver::ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) override;
// Update the touch exploration controller so that synthesized touch
// events are anchored at this point.
void SetTouchAccessibilityAnchorPoint(const gfx::Point& anchor_point);
// Sets the delegate for earcons.
void SetAccessibilitySoundDelegate(
std::unique_ptr<AccessibilitySoundDelegate> delegate);
private:
void UpdateTouchExplorationState();
std::unique_ptr<TouchExplorationController> touch_exploration_controller_;
bool touch_exploration_enabled_;
// Not owned; must outlive TouchExplorationManager.
aura::Window* root_window_;
wm::ActivationClient* activation_client_;
AccessibilityFocusRingController* accessibility_focus_ring_controller_;
std::unique_ptr<AccessibilitySoundDelegate> accessibility_sound_delegate_;
DISALLOW_COPY_AND_ASSIGN(TouchExplorationManager);
};
} // namespace shell
} // namespace chromecast
#endif // CHROMECAST_BROWSER_ACCESSIBILITY_TOUCH_EXPLORATION_MANAGER_H_