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 			threadexits("read error");
57 		if(resized)
58 			send(mc->resizec, &one);
59 		send(mc->c, &m);
60 		/*
61 		 * mc->m is updated after send so it doesn't have wrong value if we block during send.
62 		 * This means that programs should receive into mc->Mouse (see readmouse() above) if
63 		 * they want full synchrony.
64 		 */
65 		mc->m = m;
66 	}
67 }
68 
69 Mousectl*
70 initmouse(char *file, Image *i)
71 {
72 	Mousectl *mc;
73 
74 	mc = mallocz(sizeof(Mousectl), 1);
75 	if(i)
76 		mc->display = i->display;
77 	mc->c = chancreate(sizeof(Mouse), 0);
78 	chansetname(mc->c, "mousec");
79 	mc->resizec = chancreate(sizeof(int), 2);
80 	chansetname(mc->resizec, "resizec");
81 	proccreate(_ioproc, mc, 32*1024);
82 	return mc;
83 }
84 
85 void
86 setcursor(Mousectl *mc, Cursor *c)
87 {
88 	_displaycursor(mc->display, c);
89 }
90