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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/events.h"
#include <X11/extensions/XInput2.h>
#include "base/logging.h"
#include "ui/base/keycodes/keyboard_code_conversion_x.h"
#include "ui/base/touch/touch_factory.h"
#include "ui/gfx/point.h"
namespace {
// Scroll amount for each wheelscroll event. 53 is also the value used for GTK+.
static int kWheelScrollAmount = 53;
int GetEventFlagsFromXState(unsigned int state) {
int flags = 0;
if (state & ControlMask)
flags |= ui::EF_CONTROL_DOWN;
if (state & ShiftMask)
flags |= ui::EF_SHIFT_DOWN;
if (state & Mod1Mask)
flags |= ui::EF_ALT_DOWN;
if (state & LockMask)
flags |= ui::EF_CAPS_LOCK_DOWN;
if (state & Button1Mask)
flags |= ui::EF_LEFT_BUTTON_DOWN;
if (state & Button2Mask)
flags |= ui::EF_MIDDLE_BUTTON_DOWN;
if (state & Button3Mask)
flags |= ui::EF_RIGHT_BUTTON_DOWN;
return flags;
}
// Get the event flag for the button in XButtonEvent. During a ButtonPress
// event, |state| in XButtonEvent does not include the button that has just been
// pressed. Instead |state| contains flags for the buttons (if any) that had
// already been pressed before the current button, and |button| stores the most
// current pressed button. So, if you press down left mouse button, and while
// pressing it down, press down the right mouse button, then for the latter
// event, |state| would have Button1Mask set but not Button3Mask, and |button|
// would be 3.
int GetEventFlagsForButton(int button) {
switch (button) {
case 1:
return ui::EF_LEFT_BUTTON_DOWN;
case 2:
return ui::EF_MIDDLE_BUTTON_DOWN;
case 3:
return ui::EF_RIGHT_BUTTON_DOWN;
}
DLOG(WARNING) << "Unexpected button (" << button << ") received.";
return 0;
}
int GetButtonMaskForX2Event(XIDeviceEvent* xievent) {
int buttonflags = 0;
for (int i = 0; i < 8 * xievent->buttons.mask_len; i++) {
if (XIMaskIsSet(xievent->buttons.mask, i)) {
buttonflags |= GetEventFlagsForButton(i);
}
}
return buttonflags;
}
ui::EventType GetTouchEventType(const base::NativeEvent& native_event) {
XIDeviceEvent* event =
static_cast<XIDeviceEvent*>(native_event->xcookie.data);
#if defined(USE_XI2_MT)
switch(event->evtype) {
case XI_TouchBegin:
return ui::ET_TOUCH_PRESSED;
case XI_TouchUpdate:
return ui::ET_TOUCH_MOVED;
case XI_TouchEnd:
return ui::ET_TOUCH_RELEASED;
}
return ui::ET_UNKNOWN;
#else
ui::TouchFactory* factory = ui::TouchFactory::GetInstance();
// Check to see if we are treating a mouse-event as a touch-device.
if (!factory->IsRealTouchDevice(event->sourceid)) {
switch (event->evtype) {
case XI_ButtonPress:
return ui::ET_TOUCH_PRESSED;
case XI_ButtonRelease:
return ui::ET_TOUCH_RELEASED;
case XI_Motion:
return ui::ET_TOUCH_MOVED;
default:
NOTREACHED();
}
}
DCHECK_EQ(event->evtype, XI_Motion);
// Note: We will not generate a _STATIONARY event here. It will be created,
// when necessary, by a RWHVV.
// TODO(sad): When should _CANCELLED be generated?
float slot;
if (!factory->ExtractTouchParam(*native_event, ui::TouchFactory::TP_SLOT_ID,
&slot))
return ui::ET_UNKNOWN;
if (!factory->IsSlotUsed(slot)) {
// This is a new touch point.
return ui::ET_TOUCH_PRESSED;
}
float tracking;
if (!factory->ExtractTouchParam(*native_event,
ui::TouchFactory::TP_TRACKING_ID, &tracking))
return ui::ET_UNKNOWN;
if (tracking == 0l) {
// The touch point has been released.
return ui::ET_TOUCH_RELEASED;
}
return ui::ET_TOUCH_MOVED;
#endif // defined(USE_XI2_MT)
}
} // namespace
namespace ui {
EventType EventTypeFromNative(const base::NativeEvent& native_event) {
switch (native_event->type) {
case KeyPress:
return ET_KEY_PRESSED;
case KeyRelease:
return ET_KEY_RELEASED;
case ButtonPress:
if (native_event->xbutton.button == 4 ||
native_event->xbutton.button == 5)
return ET_MOUSEWHEEL;
return ET_MOUSE_PRESSED;
case ButtonRelease:
if (native_event->xbutton.button == 4 ||
native_event->xbutton.button == 5)
return ET_MOUSEWHEEL;
return ET_MOUSE_RELEASED;
case MotionNotify:
if (native_event->xmotion.state &
(Button1Mask | Button2Mask | Button3Mask))
return ET_MOUSE_DRAGGED;
return ET_MOUSE_MOVED;
case GenericEvent: {
XIDeviceEvent* xievent =
static_cast<XIDeviceEvent*>(native_event->xcookie.data);
if (TouchFactory::GetInstance()->IsTouchDevice(xievent->sourceid))
return GetTouchEventType(native_event);
switch (xievent->evtype) {
case XI_ButtonPress:
return (xievent->detail == 4 || xievent->detail == 5) ?
ET_MOUSEWHEEL : ET_MOUSE_PRESSED;
case XI_ButtonRelease:
return (xievent->detail == 4 || xievent->detail == 5) ?
ET_MOUSEWHEEL : ET_MOUSE_RELEASED;
case XI_Motion:
return GetButtonMaskForX2Event(xievent) ?
ET_MOUSE_DRAGGED : ET_MOUSE_MOVED;
}
}
default:
NOTREACHED();
break;
}
return ET_UNKNOWN;
}
int EventFlagsFromNative(const base::NativeEvent& native_event) {
switch (native_event->type) {
case KeyPress:
case KeyRelease:
return GetEventFlagsFromXState(native_event->xbutton.state);
case ButtonPress:
case ButtonRelease:
return GetEventFlagsFromXState(native_event->xbutton.state) |
GetEventFlagsForButton(native_event->xbutton.button);
case MotionNotify:
return GetEventFlagsFromXState(native_event->xmotion.state);
case GenericEvent: {
XIDeviceEvent* xievent =
static_cast<XIDeviceEvent*>(native_event->xcookie.data);
bool touch =
TouchFactory::GetInstance()->IsTouchDevice(xievent->sourceid);
switch (xievent->evtype) {
case XI_ButtonPress:
case XI_ButtonRelease:
return GetButtonMaskForX2Event(xievent) |
GetEventFlagsFromXState(xievent->mods.effective) |
(touch ? 0 : GetEventFlagsForButton(xievent->detail));
case XI_Motion:
return GetButtonMaskForX2Event(xievent) |
GetEventFlagsFromXState(xievent->mods.effective);
}
}
}
return 0;
}
gfx::Point EventLocationFromNative(const base::NativeEvent& native_event) {
switch (native_event->type) {
case ButtonPress:
case ButtonRelease:
return gfx::Point(native_event->xbutton.x, native_event->xbutton.y);
case MotionNotify:
return gfx::Point(native_event->xmotion.x, native_event->xmotion.y);
case GenericEvent: {
XIDeviceEvent* xievent =
static_cast<XIDeviceEvent*>(native_event->xcookie.data);
return gfx::Point(static_cast<int>(xievent->event_x),
static_cast<int>(xievent->event_y));
}
}
return gfx::Point();
}
KeyboardCode KeyboardCodeFromNative(const base::NativeEvent& native_event) {
return KeyboardCodeFromXKeyEvent(native_event);
}
bool IsMouseEvent(const base::NativeEvent& native_event) {
if (native_event->type == ButtonPress ||
native_event->type == ButtonRelease ||
native_event->type == MotionNotify)
return true;
if (native_event->type == GenericEvent) {
XIDeviceEvent* xievent =
static_cast<XIDeviceEvent*>(native_event->xcookie.data);
return xievent->evtype == XI_ButtonPress ||
xievent->evtype == XI_ButtonRelease ||
xievent->evtype == XI_Motion;
}
return false;
}
int GetMouseWheelOffset(const base::NativeEvent& native_event) {
if (native_event->type == GenericEvent) {
XIDeviceEvent* xiev =
static_cast<XIDeviceEvent*>(native_event->xcookie.data);
return xiev->detail == 4 ? kWheelScrollAmount : -kWheelScrollAmount;
}
return native_event->xbutton.button == 4 ?
kWheelScrollAmount : -kWheelScrollAmount;
}
} // namespace ui
|
