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 "WebEvent.h"
32#include <WebCore/PageIdentifier.h>
33#include <WebCore/WheelEventDeltaFilter.h>
34#include <memory>
35#include <wtf/HashMap.h>
36#include <wtf/Lock.h>
37#include <wtf/Noncopyable.h>
38#include <wtf/RefPtr.h>
39#include <wtf/ThreadingPrimitives.h>
40
41#if ENABLE(MAC_GESTURE_EVENTS)
42#include "WebGestureEvent.h"
43#endif
44
45namespace WebCore {
46class ThreadedScrollingTree;
47}
48
49namespace WebKit {
50
51class WebEvent;
52class WebPage;
53class WebWheelEvent;
54
55class EventDispatcher : public IPC::Connection::WorkQueueMessageReceiver {
56public:
57 static Ref<EventDispatcher> create();
58 ~EventDispatcher();
59
60#if ENABLE(ASYNC_SCROLLING)
61 void addScrollingTreeForPage(WebPage*);
62 void removeScrollingTreeForPage(WebPage*);
63#endif
64
65#if ENABLE(IOS_TOUCH_EVENTS)
66 typedef Vector<WebTouchEvent, 1> TouchEventQueue;
67
68 void clearQueuedTouchEventsForPage(const WebPage&);
69 void getQueuedTouchEventsForPage(const WebPage&, TouchEventQueue&);
70#endif
71
72 void initializeConnection(IPC::Connection*);
73
74private:
75 EventDispatcher();
76
77 // IPC::Connection::WorkQueueMessageReceiver.
78 void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
79
80 // Message handlers
81 void wheelEvent(WebCore::PageIdentifier, const WebWheelEvent&, bool canRubberBandAtLeft, bool canRubberBandAtRight, bool canRubberBandAtTop, bool canRubberBandAtBottom);
82#if ENABLE(IOS_TOUCH_EVENTS)
83 void touchEvent(WebCore::PageIdentifier, const WebTouchEvent&);
84#endif
85#if ENABLE(MAC_GESTURE_EVENTS)
86 void gestureEvent(WebCore::PageIdentifier, const WebGestureEvent&);
87#endif
88
89
90 // This is called on the main thread.
91 void dispatchWheelEvent(WebCore::PageIdentifier, const WebWheelEvent&);
92#if ENABLE(IOS_TOUCH_EVENTS)
93 void dispatchTouchEvents();
94#endif
95#if ENABLE(MAC_GESTURE_EVENTS)
96 void dispatchGestureEvent(WebCore::PageIdentifier, const WebGestureEvent&);
97#endif
98
99#if ENABLE(ASYNC_SCROLLING)
100 void sendDidReceiveEvent(WebCore::PageIdentifier, const WebEvent&, bool didHandleEvent);
101#endif
102
103 Ref<WorkQueue> m_queue;
104
105#if ENABLE(ASYNC_SCROLLING)
106 Lock m_scrollingTreesMutex;
107 HashMap<WebCore::PageIdentifier, RefPtr<WebCore::ThreadedScrollingTree>> m_scrollingTrees;
108#endif
109 std::unique_ptr<WebCore::WheelEventDeltaFilter> m_recentWheelEventDeltaFilter;
110#if ENABLE(IOS_TOUCH_EVENTS)
111 Lock m_touchEventsLock;
112 HashMap<WebCore::PageIdentifier, TouchEventQueue> m_touchEvents;
113#endif
114};
115
116} // namespace WebKit
117
118#endif // EventDispatcher_h
119