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// Copyright 2016 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_VIEW_FACTORY_H_
#define UI_MESSAGE_CENTER_MESSAGE_VIEW_FACTORY_H_
#include "ui/message_center/message_center_export.h"
#include <memory>
#include "base/callback_forward.h"
namespace message_center {
class MessageView;
class Notification;
// Creates appropriate MessageViews for notifications depending on the
// notification type. A notification is top level if it needs to be rendered
// outside the browser window. No custom shadows are created for top level
// notifications on Linux with Aura.
class MESSAGE_CENTER_EXPORT MessageViewFactory {
public:
// A function that creates MessageView for a NOTIFICATION_TYPE_CUSTOM
// notification.
typedef base::Callback<std::unique_ptr<MessageView>(const Notification&)>
CustomMessageViewFactoryFunction;
static MessageView* Create(const Notification& notification, bool top_level);
// Sets the function that will be invoked to create a custom notification
// view. This should be a repeating callback. It's an error to attempt to show
// a custom notification without first having called this function. Currently,
// only ARC uses custom notifications, so this doesn't need to distinguish
// between various sources of custom notification.
static void SetCustomNotificationViewFactory(
const CustomMessageViewFactoryFunction& factory_function);
// Returns whether the custom view factory function has already been set.
static bool HasCustomNotificationViewFactory();
};
} // namespace message_center
#endif // UI_MESSAGE_CENTER_MESSAGE_VIEW_FACTORY_H_
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