File: NotificationCenter.h

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/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef NotificationCenter_h
#define NotificationCenter_h

#include "ExceptionCode.h"
#include "Notification.h"
#include "ScriptExecutionContext.h"
#include "Timer.h"
#include "VoidCallback.h"
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>

#if ENABLE(NOTIFICATIONS) || ENABLE(LEGACY_NOTIFICATIONS)

namespace WebCore {

class NotificationClient;
class VoidCallback;

class NotificationCenter : public RefCounted<NotificationCenter>, public ActiveDOMObject {
public:
    static PassRef<NotificationCenter> create(ScriptExecutionContext*, NotificationClient*);

#if ENABLE(LEGACY_NOTIFICATIONS)
    PassRefPtr<Notification> createNotification(const String& iconURI, const String& title, const String& body, ExceptionCode& ec)
    {
        if (!client()) {
            ec = INVALID_STATE_ERR;
            return 0;
        }
        return Notification::create(title, body, iconURI, scriptExecutionContext(), ec, this);
    }
#endif

    NotificationClient* client() const { return m_client; }

#if ENABLE(LEGACY_NOTIFICATIONS)
    int checkPermission();
    void requestPermission(PassRefPtr<VoidCallback> = 0);
#endif

private:
    NotificationCenter(ScriptExecutionContext*, NotificationClient*);

    // ActiveDOMObject
    virtual void stop() override;

    class NotificationRequestCallback : public RefCounted<NotificationRequestCallback> {
    public:
        static PassRefPtr<NotificationRequestCallback> createAndStartTimer(NotificationCenter*, PassRefPtr<VoidCallback>);
        void startTimer();
        void timerFired(Timer<NotificationRequestCallback>&);
    private:
        NotificationRequestCallback(NotificationCenter*, PassRefPtr<VoidCallback>);

        RefPtr<NotificationCenter> m_notificationCenter;
        Timer<NotificationRequestCallback> m_timer;
        RefPtr<VoidCallback> m_callback;
    };

    void requestTimedOut(NotificationRequestCallback*);

    NotificationClient* m_client;
    HashSet<RefPtr<NotificationRequestCallback>> m_callbacks;
};

} // namespace WebCore

#endif // ENABLE(NOTIFICATIONS) || ENABLE(LEGACY_NOTIFICATIONS)

#endif // NotificationCenter_h