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// Copyright 2021 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 COMPONENTS_GLOBAL_MEDIA_CONTROLS_MEDIA_ITEM_MANAGER_IMPL_H_
#define COMPONENTS_GLOBAL_MEDIA_CONTROLS_MEDIA_ITEM_MANAGER_IMPL_H_
#include <set>
#include <string>
#include "base/component_export.h"
#include "base/containers/flat_set.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "components/global_media_controls/public/media_item_manager.h"
namespace media_message_center {
class MediaNotificationItem;
} // namespace media_message_center
namespace global_media_controls {
class MediaDialogDelegate;
class MediaItemManagerObserver;
class MediaItemProducer;
class COMPONENT_EXPORT(GLOBAL_MEDIA_CONTROLS) MediaItemManagerImpl
: public MediaItemManager {
public:
MediaItemManagerImpl();
MediaItemManagerImpl(const MediaItemManagerImpl&) = delete;
MediaItemManagerImpl& operator=(const MediaItemManagerImpl&) = delete;
~MediaItemManagerImpl() override;
// MediaItemManager:
void AddObserver(MediaItemManagerObserver* observer) override;
void RemoveObserver(MediaItemManagerObserver* observer) override;
void AddItemProducer(MediaItemProducer* producer) override;
void RemoveItemProducer(MediaItemProducer* producer) override;
void ShowItem(const std::string& id) override;
void HideItem(const std::string& id) override;
void OnItemsChanged() override;
void SetDialogDelegate(MediaDialogDelegate* delegate) override;
void SetDialogDelegateForId(MediaDialogDelegate* delegate,
const std::string& id) override;
void FocusDialog() override;
void HideDialog() override;
bool HasActiveItems() override;
bool HasFrozenItems() override;
bool HasOpenDialog() override;
private:
// Called to display an item in an existing dialog.
void ShowAndObserveItem(const std::string& id);
// Returns active controllable items gathered from all the item producers.
std::set<std::string> GetActiveControllableItemIds() const;
// Looks up an item from any source. Returns null if not found.
base::WeakPtr<media_message_center::MediaNotificationItem> GetItem(
const std::string& id);
MediaItemProducer* GetItemProducer(const std::string& item_id);
// Updates |dialog_delegate_| and notifies |observers_|. Called from
// SetDialogDelegate() and SetDialogDelegateForId().
void SetDialogDelegateCommon(MediaDialogDelegate* delegate);
// True if there is an open MediaDialogView and the dialog is opened for a
// single item.
bool HasOpenDialogForItem();
raw_ptr<MediaDialogDelegate> dialog_delegate_ = nullptr;
// True if the dialog was opened by |SetDialogDelegateForId()|. The
// value does not indicate whether the MediaDialogView is opened or not.
bool dialog_opened_for_single_item_ = false;
// Pointers to all item producers used by |this|.
base::flat_set<MediaItemProducer*> item_producers_;
base::ObserverList<MediaItemManagerObserver> observers_;
base::WeakPtrFactory<MediaItemManager> weak_ptr_factory_{this};
};
} // namespace global_media_controls
#endif // COMPONENTS_GLOBAL_MEDIA_CONTROLS_MEDIA_ITEM_MANAGER_IMPL_H_
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