1/* 2 * Copyright (C) 2011, 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 EventDispatcher_h 27#define EventDispatcher_h 28 29#include "Connection.h" 30 31#include <WebCore/WheelEventDeltaTracker.h> 32#include <WebEvent.h> 33#include <memory> 34#include <wtf/HashMap.h> 35#include <wtf/Noncopyable.h> 36#include <wtf/RefPtr.h> 37#include <wtf/TCSpinLock.h> 38#include <wtf/ThreadingPrimitives.h> 39 40namespace WebCore { 41class ThreadedScrollingTree; 42} 43 44namespace WebKit { 45 46class WebEvent; 47class WebPage; 48class WebWheelEvent; 49 50class EventDispatcher : public IPC::Connection::WorkQueueMessageReceiver { 51public: 52 static PassRefPtr<EventDispatcher> create(); 53 ~EventDispatcher(); 54 55#if ENABLE(ASYNC_SCROLLING) 56 void addScrollingTreeForPage(WebPage*); 57 void removeScrollingTreeForPage(WebPage*); 58#endif 59 60#if ENABLE(IOS_TOUCH_EVENTS) 61 typedef Vector<WebTouchEvent, 1> TouchEventQueue; 62 63 void clearQueuedTouchEventsForPage(const WebPage&); 64 void getQueuedTouchEventsForPage(const WebPage&, TouchEventQueue&); 65#endif 66 67 void initializeConnection(IPC::Connection*); 68 69private: 70 EventDispatcher(); 71 72 // IPC::Connection::WorkQueueMessageReceiver. 73 virtual void didReceiveMessage(IPC::Connection*, IPC::MessageDecoder&) override; 74 75 // Message handlers 76 void wheelEvent(uint64_t pageID, const WebWheelEvent&, bool canRubberBandAtLeft, bool canRubberBandAtRight, bool canRubberBandAtTop, bool canRubberBandAtBottom); 77#if ENABLE(IOS_TOUCH_EVENTS) 78 void touchEvent(uint64_t pageID, const WebTouchEvent&); 79#endif 80 81 82 // This is called on the main thread. 83 void dispatchWheelEvent(uint64_t pageID, const WebWheelEvent&); 84#if ENABLE(IOS_TOUCH_EVENTS) 85 void dispatchTouchEvents(); 86#endif 87 88#if ENABLE(ASYNC_SCROLLING) 89 void sendDidReceiveEvent(uint64_t pageID, const WebEvent&, bool didHandleEvent); 90#endif 91 92 RefPtr<WorkQueue> m_queue; 93 94#if ENABLE(ASYNC_SCROLLING) 95 Mutex m_scrollingTreesMutex; 96 HashMap<uint64_t, RefPtr<WebCore::ThreadedScrollingTree>> m_scrollingTrees; 97#endif 98 std::unique_ptr<WebCore::WheelEventDeltaTracker> m_recentWheelEventDeltaTracker; 99#if ENABLE(IOS_TOUCH_EVENTS) 100 SpinLock m_touchEventsLock; 101 HashMap<uint64_t, TouchEventQueue> m_touchEvents; 102#endif 103}; 104 105} // namespace WebKit 106 107#endif // EventDispatcher_h 108