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
|
#include "x11-inc.h"
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <cursor.h>
#include <event.h>
#include <memdraw.h>
#include "x11-memdraw.h"
ulong
event(Event *e)
{
return eread(~0UL, e);
}
static void
eflush(void)
{
/* avoid generating a message if there's nothing to show. */
/* this test isn't perfect, though; could do flushimage(display, 0) then call extract */
/* also: make sure we don't interfere if we're multiprocessing the display */
if(display->locking){
/* if locking is being done by program, this means it can't depend on automatic flush in emouse() etc. */
if(canqlock(&display->qlock)){
if(display->bufp > display->buf)
flushimage(display, 1);
unlockdisplay(display);
}
}else
if(display->bufp > display->buf)
flushimage(display, 1);
}
ulong
eread(ulong keys, Event *e)
{
int r;
ulong xmask;
XEvent xevent;
xmask = ExposureMask;
eflush();
if(keys&Emouse)
xmask |= MouseMask|StructureNotifyMask;
if(keys&Ekeyboard){
xmask |= KeyPressMask;
if((r = xtoplan9kbd(nil)) >= 0){
e->kbdc = r;
return Ekeyboard;
}
}
XSelectInput(_x.display, _x.drawable, xmask);
again:
XWindowEvent(_x.display, _x.drawable, xmask, &xevent);
switch(xevent.type){
case Expose:
xexpose(&xevent, _x.display);
goto again;
case DestroyNotify:
if(xdestroy(&xevent, _x.display))
postnote(PNGROUP, getpgrp(), "hangup");
goto again;
case ConfigureNotify:
if(xconfigure(&xevent, _x.display))
eresized(1);
goto again;
case ButtonPress:
case ButtonRelease:
case MotionNotify:
if(xtoplan9mouse(_x.display, &xevent, &e->mouse) < 0)
goto again;
return Emouse;
case KeyPress:
e->kbdc = xtoplan9kbd(&xevent);
if(e->kbdc == -1)
goto again;
return Ekeyboard;
default:
return 0;
}
}
void
einit(ulong keys)
{
keys &= ~(Emouse|Ekeyboard);
if(keys){
fprint(2, "unknown keys in einit\n");
abort();
}
}
int
ekbd(void)
{
Event e;
eread(Ekeyboard, &e);
return e.kbdc;
}
Mouse
emouse(void)
{
Event e;
eread(Emouse, &e);
return e.mouse;
}
int
ecanread(ulong keys)
{
int can;
can = 0;
if(keys&Emouse)
can |= ecanmouse();
if(keys&Ekeyboard)
can |= ecankbd();
return can;
}
int
ecanmouse(void)
{
XEvent xe;
Mouse m;
eflush();
again:
if(XCheckWindowEvent(_x.display, _x.drawable, MouseMask, &xe)){
if(xtoplan9mouse(_x.display, &xe, &m) < 0)
goto again;
XPutBackEvent(_x.display, &xe);
return 1;
}
return 0;
}
int
ecankbd(void)
{
XEvent xe;
int r;
eflush();
if((r = xtoplan9kbd(nil)) >= 0){
xtoplan9kbd((XEvent*)-1);
return 1;
}
again:
if(XCheckWindowEvent(_x.display, _x.drawable, KeyPressMask, &xe)){
if(xtoplan9kbd(&xe) == -1)
goto again;
XPutBackEvent(_x.display, &xe);
return 1;
}
return 0;
}
void
emoveto(Point p)
{
xmoveto(p);
}
void
esetcursor(Cursor *c)
{
xsetcursor(c);
}
|