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// Copyright (c) 2012 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 CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_UI_MANAGER_IMPL_H_
#define CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_UI_MANAGER_IMPL_H_
#include <deque>
#include <string>
#include <vector>
#include "base/id_map.h"
#include "base/memory/linked_ptr.h"
#include "base/prefs/pref_member.h"
#include "base/timer/timer.h"
#include "chrome/browser/notifications/notification_ui_manager.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
class Notification;
class Profile;
class QueuedNotification;
// The notification manager manages use of the desktop for notifications.
// It maintains a queue of pending notifications when space becomes constrained.
// Subclasses manage actual display and UI.
class NotificationUIManagerImpl
: public NotificationUIManager,
public content::NotificationObserver {
public:
NotificationUIManagerImpl();
virtual ~NotificationUIManagerImpl();
// NotificationUIManager:
virtual void Add(const Notification& notification,
Profile* profile) OVERRIDE;
virtual bool DoesIdExist(const std::string& notification_id) OVERRIDE;
virtual bool CancelById(const std::string& notification_id) OVERRIDE;
virtual std::set<std::string> GetAllIdsByProfileAndSourceOrigin(
Profile* profile,
const GURL& source) OVERRIDE;
virtual bool CancelAllBySourceOrigin(const GURL& source_origin) OVERRIDE;
virtual bool CancelAllByProfile(Profile* profile) OVERRIDE;
virtual void CancelAll() OVERRIDE;
void GetQueuedNotificationsForTesting(
std::vector<const Notification*>* notifications);
protected:
// Attempts to pass a notification from a waiting queue to the subclass for
// presentation. The subclass can return 'false' if it cannot show the
// notification right away. In that case it should invoke
// CheckAndShowNotificaitons() later.
virtual bool ShowNotification(const Notification& notification,
Profile* profile) = 0;
// Replace an existing notification of the same id with this one if applicable;
// subclass returns 'true' if the replacement happened.
virtual bool UpdateNotification(const Notification& notification,
Profile* profile) = 0;
// Attempts to display notifications from the show_queue. Invoked by subclasses
// if they previously returned 'false' from ShowNotifications, which may happen
// when there is no room to show another notification. When room appears, the
// subclass should call this method to cause an attempt to show more
// notifications from the waiting queue.
void CheckAndShowNotifications();
private:
// content::NotificationObserver override.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
// Attempts to display notifications from the show_queue.
void ShowNotifications();
// Replace an existing notification with this one if applicable;
// returns true if the replacement happened.
bool TryReplacement(const Notification& notification, Profile* profile);
// Checks the user state to decide if we want to show the notification.
void CheckUserState();
// A queue of notifications which are waiting to be shown.
typedef std::deque<linked_ptr<QueuedNotification> > NotificationDeque;
NotificationDeque show_queue_;
// Registrar for the other kind of notifications (event signaling).
content::NotificationRegistrar registrar_;
// Used by screen-saver and full-screen handling support.
bool is_user_active_;
base::RepeatingTimer<NotificationUIManagerImpl> user_state_check_timer_;
DISALLOW_COPY_AND_ASSIGN(NotificationUIManagerImpl);
};
#endif // CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_UI_MANAGER_IMPL_H_
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