ref: c90981972dd33870d49e8a36a7baf382849a7758
dir: /kern/devmouse.c/
#include "u.h" #include "lib.h" #include "dat.h" #include "fns.h" #include "error.h" #include "draw.h" #include "memdraw.h" #include "screen.h" int mousequeue = 1; Mouseinfo mouse; Cursorinfo cursor; static int mousechanged(void*); enum{ Qdir, Qcursor, Qmouse }; Dirtab mousedir[]={ ".", {Qdir, 0, QTDIR}, 0, DMDIR|0555, "cursor", {Qcursor}, 0, 0666, "mouse", {Qmouse}, 0, 0666, }; #define NMOUSE (sizeof(mousedir)/sizeof(Dirtab)) static Chan* mouseattach(char *spec) { return devattach('m', spec); } static Walkqid* mousewalk(Chan *c, Chan *nc, char **name, int nname) { return devwalk(c, nc, name, nname, mousedir, NMOUSE, devgen); } static int mousestat(Chan *c, uchar *db, int n) { return devstat(c, db, n, mousedir, NMOUSE, devgen); } static Chan* mouseopen(Chan *c, int omode) { switch((long)c->qid.path){ case Qdir: if(omode != OREAD) error(Eperm); break; case Qmouse: lock(&mouse.lk); if(mouse.open){ unlock(&mouse.lk); error(Einuse); } mouse.open = 1; unlock(&mouse.lk); break; } c->mode = openmode(omode); c->flag |= COPEN; c->offset = 0; return c; } void mouseclose(Chan *c) { if(!(c->flag&COPEN)) return; switch((long)c->qid.path) { case Qmouse: lock(&mouse.lk); mouse.open = 0; unlock(&mouse.lk); cursorarrow(); } } long mouseread(Chan *c, void *va, long n, vlong offset) { char buf[4*12+1]; uchar *p; int i, nn; ulong msec; /* static int map[8] = {0, 4, 2, 6, 1, 5, 3, 7 }; */ p = va; switch((long)c->qid.path){ case Qdir: return devdirread(c, va, n, mousedir, NMOUSE, devgen); case Qcursor: if(offset != 0) return 0; if(n < 2*4+2*2*16) error(Eshort); n = 2*4+2*2*16; lock(&cursor.lk); BPLONG(p+0, cursor.offset.x); BPLONG(p+4, cursor.offset.y); memmove(p+8, cursor.clr, 2*16); memmove(p+40, cursor.set, 2*16); unlock(&cursor.lk); return n; case Qmouse: while(mousechanged(0) == 0) sleep(&mouse.r, mousechanged, 0); lock(&screen.lk); if(screen.reshaped) { screen.reshaped = 0; sprint(buf, "t%11d %11d", 0, ticks()); if(n > 1+2*12) n = 1+2*12; memmove(va, buf, n); unlock(&screen.lk); return n; } unlock(&screen.lk); lock(&mouse.lk); i = mouse.ri; nn = (mouse.wi + Mousequeue - i) % Mousequeue; if(nn < 1) panic("empty mouse queue"); msec = ticks(); while(nn > 1) { if(mouse.queue[i].msec + Mousewindow > msec) break; i = (i+1)%Mousequeue; nn--; } sprint(buf, "m%11d %11d %11d %11d", mouse.queue[i].xy.x, mouse.queue[i].xy.y, mouse.queue[i].buttons, mouse.queue[i].msec); mouse.ri = (i+1)%Mousequeue; unlock(&mouse.lk); if(n > 1+4*12) n = 1+4*12; memmove(va, buf, n); return n; } return 0; } long mousewrite(Chan *c, void *va, long n, vlong offset) { char *p; Point pt; char buf[64]; USED(offset); p = va; switch((long)c->qid.path){ case Qdir: error(Eisdir); case Qcursor: if(n < 2*4+2*2*16){ cursorarrow(); }else{ n = 2*4+2*2*16; lock(&cursor.lk); cursor.offset.x = BGLONG(p+0); cursor.offset.y = BGLONG(p+4); memmove(cursor.clr, p+8, 2*16); memmove(cursor.set, p+40, 2*16); unlock(&cursor.lk); setcursor(); } return n; case Qmouse: if(n > sizeof buf-1) n = sizeof buf -1; memmove(buf, va, n); buf[n] = 0; p = 0; pt.x = strtoul(buf+1, &p, 0); if(p == 0) error(Eshort); pt.y = strtoul(p, 0, 0); if(ptinrect(pt, gscreen->r)) mouseset(pt); return n; } error(Egreg); return -1; } int mousechanged(void *a) { USED(a); return mouse.ri != mouse.wi || screen.reshaped; } Dev mousedevtab = { 'm', "mouse", devreset, devinit, devshutdown, mouseattach, mousewalk, mousestat, mouseopen, devcreate, mouseclose, mouseread, devbread, mousewrite, devbwrite, devremove, devwstat, };