1/* 2 * Copyright (C) 2011 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#include <wtf/HashMap.h> 31#include <wtf/Noncopyable.h> 32#include <wtf/RefPtr.h> 33#include <wtf/ThreadingPrimitives.h> 34 35namespace WebCore { 36 class ScrollingTree; 37} 38 39namespace WebKit { 40 41class WebEvent; 42class WebPage; 43class WebWheelEvent; 44 45#if ENABLE(GESTURE_EVENTS) 46class WebGestureEvent; 47#endif 48 49class EventDispatcher : public CoreIPC::Connection::WorkQueueMessageReceiver { 50public: 51 static PassRefPtr<EventDispatcher> create(); 52 ~EventDispatcher(); 53 54#if ENABLE(THREADED_SCROLLING) 55 void addScrollingTreeForPage(WebPage*); 56 void removeScrollingTreeForPage(WebPage*); 57#endif 58 59 void initializeConnection(CoreIPC::Connection*); 60 61private: 62 EventDispatcher(); 63 64 // CoreIPC::Connection::WorkQueueMessageReceiver. 65 virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageDecoder&) OVERRIDE; 66 67 // Message handlers 68 void wheelEvent(uint64_t pageID, const WebWheelEvent&, bool canGoBack, bool canGoForward); 69#if ENABLE(GESTURE_EVENTS) 70 void gestureEvent(uint64_t pageID, const WebGestureEvent&); 71#endif 72 73 // This is called on the main thread. 74 void dispatchWheelEvent(uint64_t pageID, const WebWheelEvent&); 75#if ENABLE(GESTURE_EVENTS) 76 void dispatchGestureEvent(uint64_t pageID, const WebGestureEvent&); 77#endif 78 79#if ENABLE(THREADED_SCROLLING) 80 void sendDidReceiveEvent(uint64_t pageID, const WebEvent&, bool didHandleEvent); 81#endif 82 83 RefPtr<WorkQueue> m_queue; 84 85#if ENABLE(THREADED_SCROLLING) 86 Mutex m_scrollingTreesMutex; 87 HashMap<uint64_t, RefPtr<WebCore::ScrollingTree>> m_scrollingTrees; 88#endif 89}; 90 91} // namespace WebKit 92 93#endif // EventDispatcher_h 94