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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 UI_MESSAGE_CENTER_MESSAGE_CENTER_H_
#define UI_MESSAGE_CENTER_MESSAGE_CENTER_H_
#include <string>
#include "base/memory/scoped_ptr.h"
#include "base/observer_list.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/message_center/message_center_export.h"
#include "ui/message_center/message_center_types.h"
#include "ui/message_center/notification_list.h"
#include "ui/message_center/notification_types.h"
class TrayViewControllerTest;
namespace base {
class DictionaryValue;
}
// Interface to manage the NotificationList. The client (e.g. Chrome) calls
// [Add|Remove|Update]Notification to create and update notifications in the
// list. It also sends those changes to its observers when a notification
// is shown, closed, or clicked on.
namespace message_center {
class MessageCenterObserver;
class NotificationBlocker;
class NotificationList;
class NotifierSettingsDelegate;
class NotifierSettingsProvider;
class MESSAGE_CENTER_EXPORT MessageCenter {
public:
// Creates the global message center object.
static void Initialize();
// Returns the global message center object. Returns NULL if Initialize is not
// called.
static MessageCenter* Get();
// Destroys the global message_center object.
static void Shutdown();
// Management of the observer list.
virtual void AddObserver(MessageCenterObserver* observer) = 0;
virtual void RemoveObserver(MessageCenterObserver* observer) = 0;
// Queries of current notification list status.
virtual size_t NotificationCount() const = 0;
virtual size_t UnreadNotificationCount() const = 0;
virtual bool HasPopupNotifications() const = 0;
virtual bool HasNotification(const std::string& id) = 0;
virtual bool IsQuietMode() const = 0;
virtual bool HasClickedListener(const std::string& id) = 0;
// Gets all notifications to be shown to the user in the message center. Note
// that queued changes due to the message center being open are not reflected
// in this list.
virtual const NotificationList::Notifications& GetVisibleNotifications() = 0;
// Gets all notifications being shown as popups. This should not be affected
// by the change queue since notifications are not held up while the state is
// VISIBILITY_TRANSIENT or VISIBILITY_SETTINGS.
virtual NotificationList::PopupNotifications GetPopupNotifications() = 0;
// Management of NotificaitonBlockers.
virtual void AddNotificationBlocker(NotificationBlocker* blocker) = 0;
virtual void RemoveNotificationBlocker(NotificationBlocker* blocker) = 0;
// Basic operations of notification: add/remove/update.
// Adds a new notification.
virtual void AddNotification(scoped_ptr<Notification> notification) = 0;
// Updates an existing notification with id = old_id and set its id to new_id.
virtual void UpdateNotification(
const std::string& old_id,
scoped_ptr<Notification> new_notification) = 0;
// Removes an existing notification.
virtual void RemoveNotification(const std::string& id, bool by_user) = 0;
virtual void RemoveAllNotifications(bool by_user) = 0;
// Sets the icon image. Icon appears at the top-left of the notification.
virtual void SetNotificationIcon(const std::string& notification_id,
const gfx::Image& image) = 0;
// Sets the large image for the notifications of type == TYPE_IMAGE. Specified
// image will appear below of the notification.
virtual void SetNotificationImage(const std::string& notification_id,
const gfx::Image& image) = 0;
// Sets the image for the icon of the specific action button.
virtual void SetNotificationButtonIcon(const std::string& notification_id,
int button_index,
const gfx::Image& image) = 0;
// Operations happening especially from GUIs: click, expand, disable,
// and settings.
// Searches through the notifications and disables any that match the
// extension id given.
virtual void DisableNotificationsByNotifier(
const NotifierId& notifier_id) = 0;
// Reformat a notification to show its entire text content.
virtual void ExpandNotification(const std::string& id) = 0;
// This should be called by UI classes when a notification is clicked to
// trigger the notification's delegate callback and also update the message
// center observers.
virtual void ClickOnNotification(const std::string& id) = 0;
// This should be called by UI classes when a notification button is clicked
// to trigger the notification's delegate callback and also update the message
// center observers.
virtual void ClickOnNotificationButton(const std::string& id,
int button_index) = 0;
// This should be called by UI classes after a visible notification popup
// closes, indicating that the notification has been shown to the user.
// |mark_notification_as_read|, if false, will unset the read bit on a
// notification, increasing the unread count of the center.
virtual void MarkSinglePopupAsShown(const std::string& id,
bool mark_notification_as_read) = 0;
// This should be called by UI classes when a notification is first displayed
// to the user, in order to decrement the unread_count for the tray, and to
// notify observers that the notification is visible.
virtual void DisplayedNotification(const std::string& id) = 0;
// Setter/getter of notifier settings provider. This will be a weak reference.
// This should be set at the initialization process. The getter may return
// NULL for tests.
virtual void SetNotifierSettingsProvider(
NotifierSettingsProvider* provider) = 0;
virtual NotifierSettingsProvider* GetNotifierSettingsProvider() = 0;
// This can be called to change the quiet mode state (without a timeout).
virtual void SetQuietMode(bool in_quiet_mode) = 0;
// Temporarily enables quiet mode for |expires_in| time.
virtual void EnterQuietModeWithExpire(const base::TimeDelta& expires_in) = 0;
// Informs the notification list whether the message center is visible.
// This affects whether or not a message has been "read".
virtual void SetVisibility(Visibility visible) = 0;
// Allows querying the visibility of the center.
virtual bool IsMessageCenterVisible() = 0;
// UI classes should call this when there is cause to leave popups visible for
// longer than the default (for example, when the mouse hovers over a popup).
virtual void PausePopupTimers() = 0;
// UI classes should call this when the popup timers should restart (for
// example, after the mouse leaves the popup.)
virtual void RestartPopupTimers() = 0;
protected:
friend class ::TrayViewControllerTest;
virtual void DisableTimersForTest() = 0;
MessageCenter();
virtual ~MessageCenter();
private:
DISALLOW_COPY_AND_ASSIGN(MessageCenter);
};
} // namespace message_center
#endif // UI_MESSAGE_CENTER_MESSAGE_CENTER_H_
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