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
|
/*
* Copyright (C) 2014 Igalia S.L.
*
* 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. AND ITS CONTRIBUTORS ``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 ITS 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.
*/
#ifndef GestureController_h
#define GestureController_h
#if HAVE(GTK_GESTURES)
#include <WebCore/FloatPoint.h>
#include <wtf/Noncopyable.h>
#include <wtf/RunLoop.h>
#include <wtf/glib/GRefPtr.h>
typedef union _GdkEvent GdkEvent;
typedef struct _GdkEventSequence GdkEventSequence;
typedef struct _GtkGesture GtkGesture;
namespace WebKit {
class WebPageProxy;
class GestureController {
WTF_MAKE_NONCOPYABLE(GestureController);
public:
GestureController(WebPageProxy&);
bool isProcessingGestures() const;
bool handleEvent(const GdkEvent*);
void reset()
{
m_dragGesture.reset();
m_swipeGesture.reset();
m_zoomGesture.reset();
}
private:
class Gesture {
public:
void reset();
bool isActive() const;
void handleEvent(const GdkEvent*);
protected:
Gesture(GtkGesture*, WebPageProxy&);
GRefPtr<GtkGesture> m_gesture;
WebPageProxy& m_page;
};
class DragGesture final : public Gesture {
public:
DragGesture(WebPageProxy&);
private:
// Notify that a drag started, allowing to stop kinetic deceleration.
void startDrag(const GdkEvent*);
void handleDrag(const GdkEvent*, double x, double y);
void handleTap(const GdkEvent*);
void longPressFired();
static void begin(DragGesture*, double x, double y, GtkGesture*);
static void update(DragGesture*, double x, double y, GtkGesture*);
static void end(DragGesture*, GdkEventSequence*, GtkGesture*);
WebCore::FloatPoint m_start;
WebCore::FloatPoint m_offset;
RunLoop::Timer<DragGesture> m_longPressTimeout;
GRefPtr<GtkGesture> m_longPress;
bool m_inDrag;
};
class SwipeGesture final : public Gesture {
public:
SwipeGesture(WebPageProxy&);
private:
void startMomentumScroll(const GdkEvent*, double velocityX, double velocityY);
static void swipe(SwipeGesture*, double velocityX, double velocityY, GtkGesture*);
};
class ZoomGesture final : public Gesture {
public:
ZoomGesture(WebPageProxy&);
private:
WebCore::IntPoint center() const;
void handleZoom();
static void begin(ZoomGesture*, GdkEventSequence*, GtkGesture*);
static void scaleChanged(ZoomGesture*, double scale, GtkGesture*);
gdouble m_initialScale;
gdouble m_scale;
WebCore::IntPoint m_initialPoint;
WebCore::IntPoint m_viewPoint;
RunLoop::Timer<ZoomGesture> m_idle;
};
DragGesture m_dragGesture;
SwipeGesture m_swipeGesture;
ZoomGesture m_zoomGesture;
};
} // namespace WebKit
#endif // HAVE(GTK_GESTURES)
#endif // GestureController_h
|
