/* * Copyright (C) 2020 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: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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. */ #pragma once #if PLATFORM(IOS_FAMILY) #import <wtf/RetainPtr.h> #import <wtf/WeakHashSet.h> OBJC_CLASS NSSet; OBJC_CLASS RBSProcessMonitor; namespace WebKit { class WebPageProxy; class EndowmentStateTracker { WTF_MAKE_FAST_ALLOCATED; public: static EndowmentStateTracker& singleton(); class Client : public CanMakeWeakPtr<Client> { public: virtual ~Client() = default; virtual void isUserFacingChanged(bool) { } virtual void isVisibleChanged(bool) { } }; bool isVisible() const { return ensureState().isVisible; } bool isUserFacing() const { return ensureState().isUserFacing; } void addClient(Client&); void removeClient(Client&); static bool isApplicationForeground(pid_t); private: friend class NeverDestroyed<EndowmentStateTracker>; EndowmentStateTracker() = default; void registerMonitorIfNecessary(); struct State { bool isUserFacing; bool isVisible; }; static State stateFromEndowments(NSSet *endowments); const State& ensureState() const; void setState(State&&); WeakHashSet<Client> m_clients; RetainPtr<RBSProcessMonitor> m_processMonitor; mutable Optional<State> m_state; }; } #endif