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- #include <u.h>
- #include <libc.h>
- #include <draw.h>
- #include <thread.h>
- #include <cursor.h>
- #include <mouse.h>
- void
- moveto(Mousectl *m, Point pt)
- {
- fprint(m->mfd, "m%d %d", pt.x, pt.y);
- m->xy = pt;
- }
- void
- closemouse(Mousectl *mc)
- {
- if(mc == nil)
- return;
- postnote(PNPROC, mc->pid, "kill");
- do; while(nbrecv(mc->c, &mc->Mouse) > 0);
- close(mc->mfd);
- close(mc->cfd);
- free(mc->file);
- free(mc->c);
- free(mc->resizec);
- free(mc);
- }
- int
- readmouse(Mousectl *mc)
- {
- if(mc->image)
- flushimage(mc->image->display, 1);
- if(recv(mc->c, &mc->Mouse) < 0){
- fprint(2, "readmouse: %r\n");
- return -1;
- }
- return 0;
- }
- static
- void
- _ioproc(void *arg)
- {
- int n, nerr, one;
- char buf[1+5*12];
- Mouse m;
- Mousectl *mc;
- mc = arg;
- threadsetname("mouseproc");
- one = 1;
- memset(&m, 0, sizeof m);
- mc->pid = getpid();
- nerr = 0;
- for(;;){
- n = read(mc->mfd, buf, sizeof buf);
- if(n != 1+4*12){
- yield(); /* if error is due to exiting, we'll exit here */
- fprint(2, "mouse: bad count %d not 49: %r\n", n);
- if(n<0 || ++nerr>10)
- threadexits("read error");
- continue;
- }
- nerr = 0;
- switch(buf[0]){
- case 'r':
- send(mc->resizec, &one);
- /* fall through */
- case 'm':
- m.xy.x = atoi(buf+1+0*12);
- m.xy.y = atoi(buf+1+1*12);
- m.buttons = atoi(buf+1+2*12);
- m.msec = atoi(buf+1+3*12);
- send(mc->c, &m);
- /*
- * mc->Mouse is updated after send so it doesn't have wrong value if we block during send.
- * This means that programs should receive into mc->Mouse (see readmouse() above) if
- * they want full synchrony.
- */
- mc->Mouse = m;
- break;
- }
- }
- }
- Mousectl*
- initmouse(char *file, Image *i)
- {
- Mousectl *mc;
- char *t, *sl;
- mc = mallocz(sizeof(Mousectl), 1);
- if(file == nil)
- file = "/dev/mouse";
- mc->file = strdup(file);
- mc->mfd = open(file, ORDWR|OCEXEC);
- if(mc->mfd<0 && strcmp(file, "/dev/mouse")==0){
- bind("#m", "/dev", MAFTER);
- mc->mfd = open(file, ORDWR|OCEXEC);
- }
- if(mc->mfd < 0){
- free(mc);
- return nil;
- }
- t = malloc(strlen(file)+16);
- strcpy(t, file);
- sl = utfrrune(t, '/');
- if(sl)
- strcpy(sl, "/cursor");
- else
- strcpy(t, "/dev/cursor");
- mc->cfd = open(t, ORDWR|OCEXEC);
- free(t);
- mc->image = i;
- mc->c = chancreate(sizeof(Mouse), 0);
- mc->resizec = chancreate(sizeof(int), 2);
- proccreate(_ioproc, mc, 4096);
- return mc;
- }
- void
- setcursor(Mousectl *mc, Cursor *c)
- {
- char curs[2*4+2*2*16];
- if(c == nil)
- write(mc->cfd, curs, 0);
- else{
- BPLONG(curs+0*4, c->offset.x);
- BPLONG(curs+1*4, c->offset.y);
- memmove(curs+2*4, c->clr, 2*2*16);
- write(mc->cfd, curs, sizeof curs);
- }
- }
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