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// Copyright 2019 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 UI_BASE_WIN_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_SERVICE_IMPL_H_
#define UI_BASE_WIN_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_SERVICE_IMPL_H_
#include <windows.foundation.h>
#include <windows.media.control.h>
#include <wrl/client.h>
#include "base/component_export.h"
#include "base/memory/singleton.h"
#include "base/observer_list.h"
#include "ui/base/win/system_media_controls/system_media_controls_service.h"
namespace system_media_controls {
class SystemMediaControlsServiceObserver;
namespace internal {
// Implementation of SystemMediaControlsService that actually connects to the
// Windows's System Media Transport Controls.
class COMPONENT_EXPORT(SYSTEM_MEDIA_CONTROLS) SystemMediaControlsServiceImpl
: public SystemMediaControlsService {
public:
SystemMediaControlsServiceImpl();
~SystemMediaControlsServiceImpl() override;
static SystemMediaControlsServiceImpl* GetInstance();
// Connects to the SystemMediaTransportControls. Returns true if connection
// is successful. If already connected, does nothing and returns true.
bool Initialize();
// SystemMediaControlsService implementation.
void AddObserver(SystemMediaControlsServiceObserver* observer) override;
void RemoveObserver(SystemMediaControlsServiceObserver* observer) override;
void SetEnabled(bool enabled) override;
void SetIsNextEnabled(bool value) override;
void SetIsPreviousEnabled(bool value) override;
void SetIsPlayEnabled(bool value) override;
void SetIsPauseEnabled(bool value) override;
void SetIsStopEnabled(bool value) override;
void SetPlaybackStatus(
ABI::Windows::Media::MediaPlaybackStatus status) override;
void SetTitle(const base::string16& title) override;
void SetArtist(const base::string16& artist) override;
void SetThumbnail(const SkBitmap& bitmap) override;
void ClearThumbnail() override;
void ClearMetadata() override;
void UpdateDisplay() override;
private:
friend struct base::DefaultSingletonTraits<SystemMediaControlsServiceImpl>;
static HRESULT ButtonPressed(
ABI::Windows::Media::ISystemMediaTransportControls* sender,
ABI::Windows::Media::ISystemMediaTransportControlsButtonPressedEventArgs*
args);
// Called by ButtonPressed when the particular key is pressed.
void OnPlay();
void OnPause();
void OnNext();
void OnPrevious();
void OnStop();
// Control and keep track of the metadata.
Microsoft::WRL::ComPtr<ABI::Windows::Media::ISystemMediaTransportControls>
system_media_controls_;
Microsoft::WRL::ComPtr<
ABI::Windows::Media::ISystemMediaTransportControlsDisplayUpdater>
display_updater_;
Microsoft::WRL::ComPtr<ABI::Windows::Media::IMusicDisplayProperties>
display_properties_;
Microsoft::WRL::ComPtr<ABI::Windows::Storage::Streams::IDataWriter>
icon_data_writer_;
Microsoft::WRL::ComPtr<ABI::Windows::Storage::Streams::IRandomAccessStream>
icon_stream_;
Microsoft::WRL::ComPtr<
ABI::Windows::Storage::Streams::IRandomAccessStreamReference>
icon_stream_reference_;
EventRegistrationToken registration_token_;
// True if we've already tried to connect to the SystemMediaTransportControls.
bool attempted_to_initialize_ = false;
// True if we've successfully registered a button handler on the
// SystemMediaTransportControls.
bool has_valid_registration_token_ = false;
// True if we've successfully connected to the SystemMediaTransportControls.
bool initialized_ = false;
base::ObserverList<SystemMediaControlsServiceObserver> observers_;
DISALLOW_COPY_AND_ASSIGN(SystemMediaControlsServiceImpl);
};
} // namespace internal
} // namespace system_media_controls
#endif // UI_BASE_WIN_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_SERVICE_IMPL_H_
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