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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_STATUS_UPDATER_H_
#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_STATUS_UPDATER_H_
#include <memory>
#include <set>
#include "components/download/content/public/all_download_item_notifier.h"
#include "components/download/public/common/download_item.h"
#include "content/public/browser/download_manager.h"
class Profile;
class ScopedProfileKeepAlive;
// Keeps track of download progress for the entire browser.
class DownloadStatusUpdater
: public download::AllDownloadItemNotifier::Observer {
public:
DownloadStatusUpdater();
DownloadStatusUpdater(const DownloadStatusUpdater&) = delete;
DownloadStatusUpdater& operator=(const DownloadStatusUpdater&) = delete;
~DownloadStatusUpdater() override;
// Fills in |*download_count| with the number of currently active downloads.
// If we know the final size of all downloads, this routine returns true
// with |*progress| set to the percentage complete of all in-progress
// downloads. Otherwise, it returns false.
bool GetProgress(float* progress, int* download_count) const;
// Add the specified DownloadManager to the list of managers for which
// this object reports status.
// The manager must not have previously been added to this updater.
// The updater will automatically disassociate itself from the
// manager when the manager is shutdown.
void AddManager(content::DownloadManager* manager);
// AllDownloadItemNotifier::Observer
void OnManagerGoingDown(content::DownloadManager* manager) override;
void OnDownloadCreated(content::DownloadManager* manager,
download::DownloadItem* item) override;
void OnDownloadUpdated(content::DownloadManager* manager,
download::DownloadItem* item) override;
protected:
// Platform-specific function to update the platform UI for download progress.
// |download| is the download item that changed. Implementations should not
// hold the value of |download| as it is not guaranteed to remain valid.
// Virtual to be overridable for testing.
virtual void UpdateAppIconDownloadProgress(download::DownloadItem* download);
// Updates the ScopedProfileKeepAlive for the profile tied to |manager|. If
// there are in-progress downloads, it will acquire a keepalive. Otherwise, it
// will release it.
//
// This prevents deleting the Profile* too early when there are still
// in-progress downloads, and the browser is not tearing down yet.
void UpdateProfileKeepAlive(content::DownloadManager* manager);
private:
std::vector<std::unique_ptr<download::AllDownloadItemNotifier>> notifiers_;
std::map<Profile*, std::unique_ptr<ScopedProfileKeepAlive>>
profile_keep_alives_;
};
#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_STATUS_UPDATER_H_
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