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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_SYSTEM_MEDIA_CONTROLS_MAC_REMOTE_COMMAND_CENTER_DELEGATE_H_
#define COMPONENTS_SYSTEM_MEDIA_CONTROLS_MAC_REMOTE_COMMAND_CENTER_DELEGATE_H_
#include "base/containers/flat_set.h"
#include "components/system_media_controls/mac/remote_cocoa/system_media_controls.mojom.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/remote.h"
@class RemoteCommandCenterDelegateCocoa;
namespace base {
class TimeDelta;
}
namespace system_media_controls {
class SystemMediaControls;
class SystemMediaControlsObserver;
namespace internal {
// Wraps an NSObject which interfaces with the MPRemoteCommandCenter.
// This class can be in-process (browser) or out-of-process (app shim). In both
// cases it communicates to the browser about events received from macOS.
class RemoteCommandCenterDelegate {
public:
RemoteCommandCenterDelegate();
RemoteCommandCenterDelegate(const RemoteCommandCenterDelegate&) = delete;
RemoteCommandCenterDelegate& operator=(const RemoteCommandCenterDelegate&) =
delete;
~RemoteCommandCenterDelegate();
// Part of the implementation of SystemMediaControls.
void AddObserver(SystemMediaControlsObserver* observer);
void RemoveObserver(SystemMediaControlsObserver* observer);
void SetIsNextEnabled(bool value);
void SetIsPreviousEnabled(bool value);
void SetIsPlayPauseEnabled(bool value);
void SetIsStopEnabled(bool value);
void SetIsSeekToEnabled(bool value);
// Called by `remote_command_center_delegate_cocoa_` when the event happens.
// Passes the message back to the browser process via `observer_remote_`.
void OnNext();
void OnPrevious();
void OnPause();
void OnPlayPause();
void OnStop();
void OnPlay();
void OnSeekTo(const base::TimeDelta& time);
// This rebinds `observer_remote_` to a different listener set.
// This is used to account for duplicate dPWAs sharing a single app shim.
void BindObserverRemote(
mojo::PendingRemote<mojom::SystemMediaControlsObserver> remote);
// Notifies the browser process when a SystemMediaControlsBridge is made.
void OnBridgeCreatedForTesting();
// Notifies the browser process when the now playing info has been cleared.
void OnMetadataClearedForTesting();
private:
// Used to track which commands we're already listening for.
enum class Command {
kStop,
kPlayPause,
kNextTrack,
kPreviousTrack,
kSeekTo,
};
bool ShouldSetCommandEnabled(Command command, bool will_enable);
// Sends messages back to the browser process about events from macOS.
mojo::Remote<mojom::SystemMediaControlsObserver> observer_remote_;
RemoteCommandCenterDelegateCocoa* __strong
remote_command_center_delegate_cocoa_;
base::flat_set<Command> enabled_commands_;
};
} // namespace internal
} // namespace system_media_controls
#endif // COMPONENTS_SYSTEM_MEDIA_CONTROLS_MAC_REMOTE_COMMAND_CENTER_DELEGATE_H_
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