1/*
2 * Copyright (C) 2001 Peter Kelly (pmk@post.com)
3 * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
4 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
5 * Copyright (C) 2003, 2005, 2006, 2008, 2010, 2013 Apple Inc. All rights reserved.
6 * Copyright (C) 2013 Samsung Electronics. All rights reserved.
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB. If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23
24#include "config.h"
25#include "WheelEvent.h"
26
27#include "DataTransfer.h"
28#include "EventNames.h"
29#include <wtf/MathExtras.h>
30
31namespace WebCore {
32
33inline static unsigned determineDeltaMode(const PlatformWheelEvent& event)
34{
35 return event.granularity() == ScrollByPageWheelEvent ? WheelEvent::DOM_DELTA_PAGE : WheelEvent::DOM_DELTA_PIXEL;
36}
37
38inline WheelEvent::WheelEvent() = default;
39
40inline WheelEvent::WheelEvent(const AtomicString& type, const Init& initializer)
41 : MouseEvent(type, initializer)
42 , m_wheelDelta(initializer.wheelDeltaX ? initializer.wheelDeltaX : -initializer.deltaX, initializer.wheelDeltaY ? initializer.wheelDeltaY : -initializer.deltaY)
43 , m_deltaX(initializer.deltaX ? initializer.deltaX : -initializer.wheelDeltaX)
44 , m_deltaY(initializer.deltaY ? initializer.deltaY : -initializer.wheelDeltaY)
45 , m_deltaZ(initializer.deltaZ)
46 , m_deltaMode(initializer.deltaMode)
47{
48}
49
50inline WheelEvent::WheelEvent(const PlatformWheelEvent& event, RefPtr<WindowProxy>&& view)
51 : MouseEvent(eventNames().wheelEvent, CanBubble::Yes, IsCancelable::Yes, IsComposed::Yes, event.timestamp().approximateMonotonicTime(), WTFMove(view), 0,
52 event.globalPosition(), event.position() , { }, event.modifiers(), 0, 0, nullptr, 0, 0, nullptr, IsSimulated::No, IsTrusted::Yes)
53 , m_wheelDelta(event.wheelTicksX() * TickMultiplier, event.wheelTicksY() * TickMultiplier)
54 , m_deltaX(-event.deltaX())
55 , m_deltaY(-event.deltaY())
56 , m_deltaMode(determineDeltaMode(event))
57 , m_underlyingPlatformEvent(event)
58{
59}
60
61Ref<WheelEvent> WheelEvent::create(const PlatformWheelEvent& event, RefPtr<WindowProxy>&& view)
62{
63 return adoptRef(*new WheelEvent(event, WTFMove(view)));
64}
65
66Ref<WheelEvent> WheelEvent::createForBindings()
67{
68 return adoptRef(*new WheelEvent);
69}
70
71Ref<WheelEvent> WheelEvent::create(const AtomicString& type, const Init& initializer)
72{
73 return adoptRef(*new WheelEvent(type, initializer));
74}
75
76void WheelEvent::initWebKitWheelEvent(int rawDeltaX, int rawDeltaY, RefPtr<WindowProxy>&& view, int screenX, int screenY, int pageX, int pageY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
77{
78 if (isBeingDispatched())
79 return;
80
81 initMouseEvent(eventNames().wheelEvent, true, true, WTFMove(view), 0, screenX, screenY, pageX, pageY, ctrlKey, altKey, shiftKey, metaKey, 0, nullptr);
82
83 // Normalize to 120 multiple for compatibility with IE.
84 m_wheelDelta = { rawDeltaX * TickMultiplier, rawDeltaY * TickMultiplier };
85 m_deltaX = -rawDeltaX;
86 m_deltaY = -rawDeltaY;
87
88 m_deltaMode = DOM_DELTA_PIXEL;
89
90 m_underlyingPlatformEvent = WTF::nullopt;
91}
92
93EventInterface WheelEvent::eventInterface() const
94{
95 return WheelEventInterfaceType;
96}
97
98bool WheelEvent::isWheelEvent() const
99{
100 return true;
101}
102
103} // namespace WebCore
104