1/* 2 * Copyright (C) 2014 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef UserActivity_h 27#define UserActivity_h 28 29#include "HysteresisActivity.h" 30 31#if HAVE(NS_ACTIVITY) 32#include <wtf/RetainPtr.h> 33#include <wtf/RunLoop.h> 34OBJC_CLASS NSString; 35#endif 36 37namespace WebCore { 38 39// The UserActivity type is used to indicate to the operating system that 40// a user initiated or visible action is taking place, and as such that 41// resources should be allocated to the process accordingly. 42class UserActivity : public HysteresisActivity<UserActivity> { 43public: 44 class Impl { 45 public: 46 explicit Impl(const char* description); 47 48 void beginActivity(); 49 void endActivity(); 50 51#if HAVE(NS_ACTIVITY) 52 private: 53 RetainPtr<id> m_activity; 54 RetainPtr<NSString> m_description; 55#endif 56 }; 57 58 explicit UserActivity(const char* description); 59 60private: 61 friend class HysteresisActivity<UserActivity>; 62 63 void started(); 64 void stopped(); 65 66 Impl m_impl; 67}; 68 69} // namespace WebCore 70 71using WebCore::UserActivity; 72 73#endif // UserActivity_h 74