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/*
* Copyright (C) 2018 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
#include "Connection.h"
#include "MessageSender.h"
#include "ProcessThrottler.h"
#include "WebBackForwardListItem.h"
#include "WebPageProxyMessagesReplies.h"
#include <WebCore/FrameIdentifier.h>
#include <wtf/RefCounted.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
class RegistrableDomain;
}
namespace WebKit {
class WebBackForwardCache;
class WebPageProxy;
class WebProcessPool;
class WebProcessProxy;
class WebsiteDataStore;
#if HAVE(VISIBILITY_PROPAGATION_VIEW)
using LayerHostingContextID = uint32_t;
#endif
enum class ShouldDelayClosingUntilFirstLayerFlush : bool { No, Yes };
class SuspendedPageProxy final: public IPC::MessageReceiver, public IPC::MessageSender {
WTF_MAKE_FAST_ALLOCATED;
public:
SuspendedPageProxy(WebPageProxy&, Ref<WebProcessProxy>&&, WebCore::FrameIdentifier mainFrameID, ShouldDelayClosingUntilFirstLayerFlush);
~SuspendedPageProxy();
static RefPtr<WebProcessProxy> findReusableSuspendedPageProcess(WebProcessPool&, const WebCore::RegistrableDomain&, WebsiteDataStore&);
WebPageProxy& page() const { return m_page; }
WebCore::PageIdentifier webPageID() const { return m_webPageID; }
WebProcessProxy& process() const { return m_process.get(); }
WebCore::FrameIdentifier mainFrameID() const { return m_mainFrameID; }
WebBackForwardCache& backForwardCache() const;
bool pageIsClosedOrClosing() const;
void waitUntilReadyToUnsuspend(CompletionHandler<void(SuspendedPageProxy*)>&&);
void unsuspend();
void pageDidFirstLayerFlush();
void closeWithoutFlashing();
#if HAVE(VISIBILITY_PROPAGATION_VIEW)
LayerHostingContextID contextIDForVisibilityPropagationInWebProcess() const { return m_contextIDForVisibilityPropagationInWebProcess; }
#if ENABLE(GPU_PROCESS)
LayerHostingContextID contextIDForVisibilityPropagationInGPUProcess() const { return m_contextIDForVisibilityPropagationInGPUProcess; }
#endif
#endif
#if !LOG_DISABLED
const char* loggingString() const;
#endif
private:
enum class SuspensionState : uint8_t { Suspending, FailedToSuspend, Suspended, Resumed };
void didProcessRequestToSuspend(SuspensionState);
void suspensionTimedOut();
void close();
// IPC::MessageReceiver
void didReceiveMessage(IPC::Connection&, IPC::Decoder&) final;
bool didReceiveSyncMessage(IPC::Connection&, IPC::Decoder&, UniqueRef<IPC::Encoder>&) final;
// IPC::MessageSender
IPC::Connection* messageSenderConnection() const final;
uint64_t messageSenderDestinationID() const final;
bool sendMessage(UniqueRef<IPC::Encoder>&&, OptionSet<IPC::SendOption>, std::optional<std::pair<CompletionHandler<void(IPC::Decoder*)>, uint64_t>>&&) final;
WebPageProxy& m_page;
WebCore::PageIdentifier m_webPageID;
Ref<WebProcessProxy> m_process;
WebCore::FrameIdentifier m_mainFrameID;
bool m_isClosed { false };
ShouldDelayClosingUntilFirstLayerFlush m_shouldDelayClosingUntilFirstLayerFlush { ShouldDelayClosingUntilFirstLayerFlush::No };
bool m_shouldCloseWhenEnteringAcceleratedCompositingMode { false };
SuspensionState m_suspensionState { SuspensionState::Suspending };
CompletionHandler<void(SuspendedPageProxy*)> m_readyToUnsuspendHandler;
RunLoop::Timer<SuspendedPageProxy> m_suspensionTimeoutTimer;
#if PLATFORM(IOS_FAMILY)
std::unique_ptr<ProcessThrottler::BackgroundActivity> m_suspensionActivity;
#endif
#if HAVE(VISIBILITY_PROPAGATION_VIEW)
LayerHostingContextID m_contextIDForVisibilityPropagationInWebProcess { 0 };
#if ENABLE(GPU_PROCESS)
LayerHostingContextID m_contextIDForVisibilityPropagationInGPUProcess { 0 };
#endif
#endif
};
} // namespace WebKit
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