chromium/components/download/content/public/all_download_item_notifier.h

// Copyright 2017 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_CONTENT_PUBLIC_ALL_DOWNLOAD_ITEM_NOTIFIER_H_
#define COMPONENTS_DOWNLOAD_CONTENT_PUBLIC_ALL_DOWNLOAD_ITEM_NOTIFIER_H_

#include <set>

#include "base/memory/raw_ptr.h"
#include "components/download/public/common/download_item.h"
#include "content/public/browser/download_manager.h"

// AllDownloadItemNotifier observes ALL the DownloadItems on a given
// DownloadManager.
// Clients should use GetManager() instead of storing their own pointer to the
// manager so that they can be sensitive to managers that have gone down.

// Example Usage:
// class DownloadSystemConsumer : public AllDownloadItemNotifier::Observer {
//  public:
//   DownloadSystemConsumer(DownloadManager* original_manager,
//            DownloadManager* incognito_manager)
//     : original_notifier_(original_manager, this),
//       incognito_notifier_(incognito_manager, this) {
//   }
//
//   virtual void OnDownloadUpdated(
//     DownloadManager* manager, DownloadItem* item) { ... }
//
//  private:
//   AllDownloadItemNotifier original_notifier_;
//   AllDownloadItemNotifier incognito_notifier_;
// };

namespace download {

class AllDownloadItemNotifier : public content::DownloadManager::Observer,
                                public DownloadItem::Observer { … };

}  // namespace download

#endif  // COMPONENTS_DOWNLOAD_CONTENT_PUBLIC_ALL_DOWNLOAD_ITEM_NOTIFIER_H_