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/*
* Copyright (C) 2011, 2014 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 "DisplayLinkObserverID.h"
#include "MessageReceiver.h"
#include "MomentumEventDispatcher.h"
#include "WebEvent.h"
#include <WebCore/FrameIdentifier.h>
#include <WebCore/PageIdentifier.h>
#include <WebCore/PlatformWheelEvent.h>
#include <WebCore/RectEdges.h>
#include <WebCore/ScrollingCoordinatorTypes.h>
#include <WebCore/WheelEventDeltaFilter.h>
#include <memory>
#include <wtf/CheckedRef.h>
#include <wtf/HashMap.h>
#include <wtf/Lock.h>
#include <wtf/Noncopyable.h>
#include <wtf/RefPtr.h>
#include <wtf/ThreadingPrimitives.h>
#include <wtf/WorkQueue.h>
#if ENABLE(MAC_GESTURE_EVENTS)
#include "WebGestureEvent.h"
#endif
#if ENABLE(IOS_TOUCH_EVENTS)
#include "WebTouchEvent.h"
#include <wtf/CompletionHandler.h>
#endif
namespace WebCore {
class ThreadedScrollingTree;
struct DisplayUpdate;
struct RemoteUserInputEventData;
using PlatformDisplayID = uint32_t;
}
namespace WebKit {
class MomentumEventDispatcher;
class ScrollingAccelerationCurve;
class WebPage;
class WebProcess;
class WebWheelEvent;
#if ENABLE(IOS_TOUCH_EVENTS)
struct TouchEventData {
WebCore::FrameIdentifier frameID;
WebTouchEvent event;
CompletionHandler<void(bool, std::optional<WebCore::RemoteUserInputEventData>)> completionHandler;
};
#endif
class EventDispatcher final :
#if ENABLE(MOMENTUM_EVENT_DISPATCHER)
public MomentumEventDispatcher::Client,
#endif
private IPC::MessageReceiver {
WTF_MAKE_FAST_ALLOCATED;
#if ENABLE(MOMENTUM_EVENT_DISPATCHER)
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(EventDispatcher);
#endif
public:
explicit EventDispatcher(WebProcess&);
~EventDispatcher();
void ref() const final;
void deref() const final;
enum class WheelEventOrigin : bool { UIProcess, MomentumEventDispatcher };
WorkQueue& queue() { return m_queue.get(); }
#if ENABLE(ASYNC_SCROLLING) && ENABLE(SCROLLING_THREAD)
void addScrollingTreeForPage(WebPage&);
void removeScrollingTreeForPage(WebPage&);
#endif
#if ENABLE(IOS_TOUCH_EVENTS)
using TouchEventQueue = Vector<TouchEventData, 1>;
void takeQueuedTouchEventsForPage(const WebPage&, UniqueRef<TouchEventQueue>&);
#endif
void initializeConnection(IPC::Connection&);
void notifyScrollingTreesDisplayDidRefresh(WebCore::PlatformDisplayID);
private:
// IPC::MessageReceiver overrides.
void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
// Message handlers
void wheelEvent(WebCore::PageIdentifier, const WebWheelEvent&, WebCore::RectEdges<WebCore::RubberBandingBehavior> rubberBandableEdges);
#if ENABLE(MOMENTUM_EVENT_DISPATCHER)
void setScrollingAccelerationCurve(WebCore::PageIdentifier, std::optional<ScrollingAccelerationCurve>);
#endif
#if ENABLE(IOS_TOUCH_EVENTS)
void touchEvent(WebCore::PageIdentifier, WebCore::FrameIdentifier, const WebTouchEvent&, CompletionHandler<void(bool, std::optional<WebCore::RemoteUserInputEventData>)>&&);
#endif
#if ENABLE(MAC_GESTURE_EVENTS)
void gestureEvent(WebCore::FrameIdentifier, WebCore::PageIdentifier, const WebGestureEvent&, CompletionHandler<void(std::optional<WebEventType>, bool, std::optional<WebCore::RemoteUserInputEventData>)>&&);
#endif
// This is called on the main thread.
void dispatchWheelEvent(WebCore::PageIdentifier, const WebWheelEvent&, OptionSet<WebCore::WheelEventProcessingSteps>, WheelEventOrigin);
void dispatchWheelEventViaMainThread(WebCore::PageIdentifier, const WebWheelEvent&, OptionSet<WebCore::WheelEventProcessingSteps>, WheelEventOrigin);
void internalWheelEvent(WebCore::PageIdentifier, const WebWheelEvent&, WebCore::RectEdges<WebCore::RubberBandingBehavior> rubberBandableEdges, WheelEventOrigin);
#if ENABLE(IOS_TOUCH_EVENTS)
void dispatchTouchEvents();
#endif
#if ENABLE(MAC_GESTURE_EVENTS)
void dispatchGestureEvent(WebCore::FrameIdentifier, WebCore::PageIdentifier, const WebGestureEvent&, CompletionHandler<void(std::optional<WebEventType>, bool, std::optional<WebCore::RemoteUserInputEventData>)>&&);
#endif
static void sendDidReceiveEvent(WebCore::PageIdentifier, WebEventType, bool didHandleEvent);
#if HAVE(DISPLAY_LINK)
void displayDidRefresh(WebCore::PlatformDisplayID, const WebCore::DisplayUpdate&, bool sendToMainThread);
#endif
#if ENABLE(SCROLLING_THREAD)
void displayDidRefreshOnScrollingThread(WebCore::PlatformDisplayID);
#endif
#if ENABLE(MOMENTUM_EVENT_DISPATCHER)
// EventDispatcher::Client
void handleSyntheticWheelEvent(WebCore::PageIdentifier, const WebWheelEvent&, WebCore::RectEdges<WebCore::RubberBandingBehavior> rubberBandableEdges) override;
void startDisplayDidRefreshCallbacks(WebCore::PlatformDisplayID) override;
void stopDisplayDidRefreshCallbacks(WebCore::PlatformDisplayID) override;
#if ENABLE(MOMENTUM_EVENT_DISPATCHER_TEMPORARY_LOGGING)
void flushMomentumEventLoggingSoon() override;
#endif
#endif
void pageScreenDidChange(WebCore::PageIdentifier, WebCore::PlatformDisplayID, std::optional<unsigned> nominalFramesPerSecond);
CheckedRef<WebProcess> m_process;
Ref<WorkQueue> m_queue;
#if ENABLE(ASYNC_SCROLLING) && ENABLE(SCROLLING_THREAD)
Lock m_scrollingTreesLock;
HashMap<WebCore::PageIdentifier, RefPtr<WebCore::ThreadedScrollingTree>> m_scrollingTrees WTF_GUARDED_BY_LOCK(m_scrollingTreesLock);
#endif
std::unique_ptr<WebCore::WheelEventDeltaFilter> m_recentWheelEventDeltaFilter;
#if ENABLE(IOS_TOUCH_EVENTS)
Lock m_touchEventsLock;
HashMap<WebCore::PageIdentifier, UniqueRef<TouchEventQueue>> m_touchEvents WTF_GUARDED_BY_LOCK(m_touchEventsLock);
#endif
#if ENABLE(MOMENTUM_EVENT_DISPATCHER)
std::unique_ptr<MomentumEventDispatcher> m_momentumEventDispatcher;
DisplayLinkObserverID m_observerID;
#endif
};
} // namespace WebKit
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