1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <thread.h>
5 #include <cursor.h>
6 #include <mouse.h>
7 
8 void
9 moveto(Mousectl *mc, Point pt)
10 {
11 	_displaymoveto(mc->display, pt);
12 	mc->m.xy = pt;
13 }
14 
15 void
16 closemouse(Mousectl *mc)
17 {
18 	if(mc == nil)
19 		return;
20 
21 /*	postnote(PNPROC, mc->pid, "kill"); */
22 
23 	do; while(nbrecv(mc->c, &mc->m) > 0);
24 	chanfree(mc->c);
25 	chanfree(mc->resizec);
26 	free(mc);
27 }
28 
29 int
30 readmouse(Mousectl *mc)
31 {
32 	if(mc->display)
33 		flushimage(mc->display, 1);
34 	if(recv(mc->c, &mc->m) < 0){
35 		fprint(2, "readmouse: %r\n");
36 		return -1;
37 	}
38 	return 0;
39 }
40 
41 static
42 void
43 _ioproc(void *arg)
44 {
45 	int one, resized;
46 	Mouse m;
47 	Mousectl *mc;
48 
49 	mc = arg;
50 	threadsetname("mouseproc");
51 	memset(&m, 0, sizeof m);
52 	one = 1;
53 	resized = 0;
54 	for(;;){
55 		if(_displayrdmouse(mc->display, &m, &resized) < 0) {
56 			if(postnote(PNPROC, getpid(), "hangup") < 0)
57 				fprint(2, "postnote: %r\n");
58 			sleep(10*1000);
59 			threadexitsall("mouse read error");
60 		}
61 		if(resized)
62 			send(mc->resizec, &one);
63 		send(mc->c, &m);
64 		/*
65 		 * mc->m is updated after send so it doesn't have wrong value if we block during send.
66 		 * This means that programs should receive into mc->Mouse (see readmouse() above) if
67 		 * they want full synchrony.
68 		 */
69 		mc->m = m;
70 	}
71 }
72 
73 Mousectl*
74 initmouse(char *file, Image *i)
75 {
76 	Mousectl *mc;
77 
78 	mc = mallocz(sizeof(Mousectl), 1);
79 	if(i)
80 		mc->display = i->display;
81 	mc->c = chancreate(sizeof(Mouse), 0);
82 	chansetname(mc->c, "mousec");
83 	mc->resizec = chancreate(sizeof(int), 2);
84 	chansetname(mc->resizec, "resizec");
85 	proccreate(_ioproc, mc, 32*1024);
86 	return mc;
87 }
88 
89 void
90 setcursor(Mousectl *mc, Cursor *c)
91 {
92 	_displaycursor(mc->display, c, nil);
93 }
94 
95 void
96 setcursor2(Mousectl *mc, Cursor *c, Cursor2 *c2)
97 {
98 	_displaycursor(mc->display, c, c2);
99 }