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// Copyright 2024 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_ACCESSIBILITY_FLASH_SCREEN_CONTROLLER_H_
#define ASH_ACCESSIBILITY_FLASH_SCREEN_CONTROLLER_H_
#include <string>
#include "ash/constants/ash_constants.h"
#include "base/scoped_observation.h"
#include "base/timer/timer.h"
#include "ui/gfx/animation/animation_delegate.h"
#include "ui/gfx/animation/throb_animation.h"
#include "ui/message_center/message_center.h"
#include "ui/message_center/message_center_observer.h"
#include "ui/message_center/message_center_types.h"
namespace ash {
// Class to control the feature which flashes the screen when a notification
// is shown.
class FlashScreenController : public message_center::MessageCenterObserver,
public gfx::AnimationDelegate {
public:
FlashScreenController();
FlashScreenController(const FlashScreenController&) = delete;
FlashScreenController& operator=(const FlashScreenController&) = delete;
~FlashScreenController() override;
// MessageCenterObserver:
void OnNotificationDisplayed(
const std::string& notification_id,
const message_center::DisplaySource display_source) override;
void OnNotificationAdded(const std::string& notification_id) override;
// AnimationDelegate:
void AnimationEnded(const gfx::Animation* animation) override;
void AnimationProgressed(const gfx::Animation* animation) override;
void AnimationCanceled(const gfx::Animation* animation) override;
// Runs the flash notification without any notification needing to be
// displayed.
void PreviewFlash();
// No need to stop an ongoing flash if one is happening, the duration is too
// short.
void set_enabled(bool enabled) { enabled_ = enabled; }
void set_color(const SkColor& color) { color_ = color; }
gfx::ThrobAnimation* GetAnimationForTesting() { return &throb_animation_; }
private:
void MaybeFlashOn(const std::string& notification_id);
void FlashOn();
void FlashOff();
bool enabled_ = false;
SkColor color_ = kDefaultFlashNotificationsColor;
// A timer that ends the flash screen color.
base::RetainingOneShotTimer notification_timer_;
gfx::ThrobAnimation throb_animation_;
base::ScopedObservation<message_center::MessageCenter, MessageCenterObserver>
notification_observer_{this};
};
} // namespace ash
#endif // ASH_ACCESSIBILITY_FLASH_SCREEN_CONTROLLER_H_
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