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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_DOWNLOAD_PUBLIC_COMMON_ALL_DOWNLOAD_EVENT_NOTIFIER_H_
#define COMPONENTS_DOWNLOAD_PUBLIC_COMMON_ALL_DOWNLOAD_EVENT_NOTIFIER_H_
#include <set>
#include "base/memory/raw_ptr.h"
#include "base/observer_list.h"
#include "components/download/public/common/download_export.h"
#include "components/download/public/common/download_item.h"
#include "components/download/public/common/simple_download_manager_coordinator.h"
namespace download {
// Observes all the download events from a single
// SimpleDownloadManagerCoordinator.
class COMPONENTS_DOWNLOAD_EXPORT AllDownloadEventNotifier
: public SimpleDownloadManagerCoordinator::Observer,
public DownloadItem::Observer {
public:
// All of the methods take the SimpleDownloadManagerCoordinator so that
// subclasses can observe multiple managers at once and easily distinguish
// which manager a given item belongs to.
class Observer : public base::CheckedObserver {
public:
Observer() = default;
Observer(const Observer&) = delete;
Observer& operator=(const Observer&) = delete;
~Observer() override = default;
virtual void OnDownloadsInitialized(
SimpleDownloadManagerCoordinator* coordinator,
bool active_downloads_only) {}
virtual void OnManagerGoingDown(
SimpleDownloadManagerCoordinator* coordinator) {}
virtual void OnDownloadCreated(SimpleDownloadManagerCoordinator* manager,
DownloadItem* item) {}
virtual void OnDownloadUpdated(SimpleDownloadManagerCoordinator* manager,
DownloadItem* item) {}
virtual void OnDownloadOpened(SimpleDownloadManagerCoordinator* manager,
DownloadItem* item) {}
virtual void OnDownloadRemoved(SimpleDownloadManagerCoordinator* manager,
DownloadItem* item) {}
};
explicit AllDownloadEventNotifier(SimpleDownloadManagerCoordinator* manager);
AllDownloadEventNotifier(const AllDownloadEventNotifier&) = delete;
AllDownloadEventNotifier& operator=(const AllDownloadEventNotifier&) = delete;
~AllDownloadEventNotifier() override;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
private:
// SimpleDownloadManagerCoordinator::Observer
void OnDownloadsInitialized(bool active_downloads_only) override;
void OnManagerGoingDown(SimpleDownloadManagerCoordinator* manager) override;
void OnDownloadCreated(DownloadItem* item) override;
// DownloadItem::Observer
void OnDownloadUpdated(DownloadItem* item) override;
void OnDownloadOpened(DownloadItem* item) override;
void OnDownloadRemoved(DownloadItem* item) override;
void OnDownloadDestroyed(DownloadItem* item) override;
raw_ptr<SimpleDownloadManagerCoordinator>
simple_download_manager_coordinator_;
std::set<raw_ptr<DownloadItem, SetExperimental>> observing_;
bool download_initialized_;
// Observers that want to be notified of download events.
base::ObserverList<Observer> observers_;
};
} // namespace download
#endif // COMPONENTS_DOWNLOAD_PUBLIC_COMMON_ALL_DOWNLOAD_EVENT_NOTIFIER_H_
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