1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/*
* Copyright (C) 2004-2016 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. ``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
* 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 "FloatPoint.h"
#include "IntPoint.h"
#include "PlatformEvent.h"
#include <wtf/WindowsExtras.h>
#if PLATFORM(GTK)
typedef struct _GdkEventScroll GdkEventScroll;
#endif
namespace WebCore {
// The ScrollByPixelWheelEvent is a fine-grained event that specifies the precise number of pixels to scroll.
// It is sent directly by touch pads on macOS, or synthesized when platforms generate line-by-line scrolling events.
//
// The ScrollByPageWheelEvent indicates that the wheel event should scroll an entire page.
// In this case, WebKit built in paging behavior is used to page up and down.
// This yields the same behavior as clicking in a scrollbar track to page up and down.
enum PlatformWheelEventGranularity : uint8_t {
ScrollByPageWheelEvent,
ScrollByPixelWheelEvent,
};
#if PLATFORM(COCOA) || PLATFORM(GTK)
enum PlatformWheelEventPhase : uint8_t {
PlatformWheelEventPhaseNone = 0,
PlatformWheelEventPhaseBegan = 1 << 0,
PlatformWheelEventPhaseStationary = 1 << 1,
PlatformWheelEventPhaseChanged = 1 << 2,
PlatformWheelEventPhaseEnded = 1 << 3,
PlatformWheelEventPhaseCancelled = 1 << 4,
PlatformWheelEventPhaseMayBegin = 1 << 5,
};
#endif
class PlatformWheelEvent : public PlatformEvent {
public:
PlatformWheelEvent()
: PlatformEvent(PlatformEvent::Wheel)
{
}
PlatformWheelEvent(IntPoint position, IntPoint globalPosition, float deltaX, float deltaY, float wheelTicksX, float wheelTicksY, PlatformWheelEventGranularity granularity, bool shiftKey, bool ctrlKey, bool altKey, bool metaKey)
: PlatformEvent(PlatformEvent::Wheel, shiftKey, ctrlKey, altKey, metaKey, 0)
, m_position(position)
, m_globalPosition(globalPosition)
, m_deltaX(deltaX)
, m_deltaY(deltaY)
, m_wheelTicksX(wheelTicksX)
, m_wheelTicksY(wheelTicksY)
, m_granularity(granularity)
{
}
PlatformWheelEvent copyTurningVerticalTicksIntoHorizontalTicks() const
{
PlatformWheelEvent copy = *this;
copy.m_deltaX = copy.m_deltaY;
copy.m_deltaY = 0;
copy.m_wheelTicksX = copy.m_wheelTicksY;
copy.m_wheelTicksY = 0;
return copy;
}
PlatformWheelEvent copyWithDeltasAndVelocity(float deltaX, float deltaY, const FloatSize& velocity) const
{
PlatformWheelEvent copy = *this;
copy.m_deltaX = deltaX;
copy.m_deltaY = deltaY;
copy.m_scrollingVelocity = velocity;
return copy;
}
const IntPoint& position() const { return m_position; } // PlatformWindow coordinates.
const IntPoint& globalPosition() const { return m_globalPosition; } // Screen coordinates.
float deltaX() const { return m_deltaX; }
float deltaY() const { return m_deltaY; }
float wheelTicksX() const { return m_wheelTicksX; }
float wheelTicksY() const { return m_wheelTicksY; }
PlatformWheelEventGranularity granularity() const { return m_granularity; }
bool directionInvertedFromDevice() const { return m_directionInvertedFromDevice; }
const FloatSize& scrollingVelocity() const { return m_scrollingVelocity; }
#if PLATFORM(GTK)
explicit PlatformWheelEvent(GdkEventScroll*);
FloatPoint swipeVelocity() const;
#endif
#if PLATFORM(COCOA)
bool hasPreciseScrollingDeltas() const { return m_hasPreciseScrollingDeltas; }
void setHasPreciseScrollingDeltas(bool hasPreciseScrollingDeltas) { m_hasPreciseScrollingDeltas = hasPreciseScrollingDeltas; }
unsigned scrollCount() const { return m_scrollCount; }
float unacceleratedScrollingDeltaX() const { return m_unacceleratedScrollingDeltaX; }
float unacceleratedScrollingDeltaY() const { return m_unacceleratedScrollingDeltaY; }
bool useLatchedEventElement() const;
bool shouldConsiderLatching() const;
bool shouldResetLatching() const;
bool isEndOfMomentumScroll() const;
#else
bool useLatchedEventElement() const { return false; }
#endif
#if PLATFORM(COCOA) || PLATFORM(GTK)
PlatformWheelEventPhase phase() const { return m_phase; }
PlatformWheelEventPhase momentumPhase() const { return m_momentumPhase; }
bool isEndOfNonMomentumScroll() const;
bool isTransitioningToMomentumScroll() const;
#endif
#if PLATFORM(WIN)
PlatformWheelEvent(HWND, WPARAM, LPARAM, bool isMouseHWheel);
PlatformWheelEvent(HWND, const FloatSize& delta, const FloatPoint& location);
#endif
protected:
IntPoint m_position;
IntPoint m_globalPosition;
float m_deltaX { 0 };
float m_deltaY { 0 };
float m_wheelTicksX { 0 };
float m_wheelTicksY { 0 };
PlatformWheelEventGranularity m_granularity { ScrollByPixelWheelEvent };
bool m_directionInvertedFromDevice { false };
// Scrolling velocity in pixels per second.
FloatSize m_scrollingVelocity;
#if PLATFORM(COCOA) || PLATFORM(GTK)
PlatformWheelEventPhase m_phase { PlatformWheelEventPhaseNone };
PlatformWheelEventPhase m_momentumPhase { PlatformWheelEventPhaseNone };
#endif
#if PLATFORM(COCOA)
bool m_hasPreciseScrollingDeltas { false };
unsigned m_scrollCount { 0 };
float m_unacceleratedScrollingDeltaX { 0 };
float m_unacceleratedScrollingDeltaY { 0 };
#endif
};
#if PLATFORM(COCOA)
inline bool PlatformWheelEvent::useLatchedEventElement() const
{
return m_phase == PlatformWheelEventPhaseBegan
|| m_phase == PlatformWheelEventPhaseChanged
|| m_momentumPhase == PlatformWheelEventPhaseBegan
|| m_momentumPhase == PlatformWheelEventPhaseChanged
|| (m_phase == PlatformWheelEventPhaseEnded && m_momentumPhase == PlatformWheelEventPhaseNone);
}
inline bool PlatformWheelEvent::shouldConsiderLatching() const
{
return m_phase == PlatformWheelEventPhaseBegan || m_phase == PlatformWheelEventPhaseMayBegin;
}
inline bool PlatformWheelEvent::shouldResetLatching() const
{
return m_phase == PlatformWheelEventPhaseCancelled || m_phase == PlatformWheelEventPhaseMayBegin || isEndOfMomentumScroll();
}
inline bool PlatformWheelEvent::isEndOfMomentumScroll() const
{
return m_phase == PlatformWheelEventPhaseNone && m_momentumPhase == PlatformWheelEventPhaseEnded;
}
#endif
#if PLATFORM(COCOA) || PLATFORM(GTK)
inline bool PlatformWheelEvent::isEndOfNonMomentumScroll() const
{
return m_phase == PlatformWheelEventPhaseEnded && m_momentumPhase == PlatformWheelEventPhaseNone;
}
inline bool PlatformWheelEvent::isTransitioningToMomentumScroll() const
{
return m_phase == PlatformWheelEventPhaseNone && m_momentumPhase == PlatformWheelEventPhaseBegan;
}
#endif
} // namespace WebCore
|
