ref: fd5ced871042acc294faa2dd2118ad8fe2c61ea2
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"
Mouseinfo mouse;
Cursorinfo cursor;
Cursorinfo arrow = {
0,
{ -1, -1 },
{ 0xFF, 0xFF, 0x80, 0x01, 0x80, 0x02, 0x80, 0x0C,
0x80, 0x10, 0x80, 0x10, 0x80, 0x08, 0x80, 0x04,
0x80, 0x02, 0x80, 0x01, 0x80, 0x02, 0x8C, 0x04,
0x92, 0x08, 0x91, 0x10, 0xA0, 0xA0, 0xC0, 0x40,
},
{ 0x00, 0x00, 0x7F, 0xFE, 0x7F, 0xFC, 0x7F, 0xF0,
0x7F, 0xE0, 0x7F, 0xE0, 0x7F, 0xF0, 0x7F, 0xF8,
0x7F, 0xFC, 0x7F, 0xFE, 0x7F, 0xFC, 0x73, 0xF8,
0x61, 0xF0, 0x60, 0xE0, 0x40, 0x40, 0x00, 0x00,
},
};
static uchar buttonmap[8] = {0,1,2,3,4,5,6,7,};
static int mouseswap;
static int scrollswap;
static int mousechanged(void*);
enum {
CMbuttonmap,
CMscrollswap,
CMswap,
};
static Cmdtab mousectlmsg[] =
{
CMbuttonmap, "buttonmap", 0,
CMscrollswap, "scrollswap", 0,
CMswap, "swap", 1,
};
enum {
Qdir,
Qcursor,
Qmouse,
Qmousectl
};
Dirtab mousedir[]={
".", {Qdir, 0, QTDIR}, 0, DMDIR|0555,
"cursor", {Qcursor}, 0, 0666,
"mouse", {Qmouse}, 0, 0666,
"mousectl", {Qmousectl}, 0, 0222,
};
#define NMOUSE (sizeof(mousedir)/sizeof(Dirtab))
static void
mouseinit(void)
{
cursor = arrow;
}
static Chan*
mouseattach(char *spec)
{
setcursor();
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:
if(tas(&mouse.open) != 0)
error(Einuse);
mouse.resize = 0;
mouse.lastcounter = mouse.state.counter;
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:
mouse.open = 0;
cursor = arrow;
setcursor();
}
}
long
mouseread(Chan *c, void *va, long n, vlong offset)
{
char buf[1+4*12+1];
Mousestate m;
uchar *p;
int b;
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(&mouse.lk);
if(mouse.ri != mouse.wi)
m = mouse.queue[mouse.ri++ % nelem(mouse.queue)];
else
m = mouse.state;
unlock(&mouse.lk);
b = buttonmap[m.buttons&7];
/* put buttons 4 and 5 back in */
b |= m.buttons & (3<<3);
if (scrollswap) {
if (b == 8)
b = 16;
else if (b == 16)
b = 8;
}
sprint(buf, "m%11d %11d %11d %11ld ",
m.xy.x, m.xy.y, b, m.msec);
mouse.lastcounter = m.counter;
if(mouse.resize){
mouse.resize = 0;
buf[0] = 'r';
}
if(n > 1+4*12)
n = 1+4*12;
memmove(va, buf, n);
return n;
}
return 0;
}
static void
setbuttonmap(char* map)
{
int i, x, one, two, three;
one = two = three = 0;
for(i = 0; i < 3; i++){
if(map[i] == 0)
error(Ebadarg);
if(map[i] == '1'){
if(one)
error(Ebadarg);
one = 1<<i;
}
else if(map[i] == '2'){
if(two)
error(Ebadarg);
two = 1<<i;
}
else if(map[i] == '3'){
if(three)
error(Ebadarg);
three = 1<<i;
}
else
error(Ebadarg);
}
if(map[i])
error(Ebadarg);
memset(buttonmap, 0, 8);
for(i = 0; i < 8; i++){
x = 0;
if(i & 1)
x |= one;
if(i & 2)
x |= two;
if(i & 4)
x |= three;
buttonmap[x] = i;
}
}
long
mousewrite(Chan *c, void *va, long n, vlong offset)
{
char *p;
Point pt;
char buf[64];
Cmdbuf *cb;
Cmdtab *ct;
USED(offset);
p = va;
switch((long)c->qid.path){
case Qdir:
error(Eisdir);
case Qcursor:
if(n < 2*4+2*2*16){
cursor = arrow;
setcursor();
}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;
case Qmousectl:
cb = parsecmd(va,n);
if(waserror()){
free(cb);
nexterror();
}
ct = lookupcmd(cb, mousectlmsg, nelem(mousectlmsg));
switch(ct->index){
case CMswap:
if(mouseswap)
setbuttonmap("123");
else
setbuttonmap("321");
mouseswap ^= 1;
break;
case CMscrollswap:
scrollswap ^= 1;
break;
case CMbuttonmap:
if(cb->nf==1)
setbuttonmap("123");
else
setbuttonmap(cb->f[1]);
break;
}
free(cb);
poperror();
return n;
}
error(Egreg);
return -1;
}
/*
* notify reader that screen has been resized
*/
void
mouseresize(void)
{
mouse.resize = 1;
wakeup(&mouse.r);
}
int
mousechanged(void *a)
{
USED(a);
return mouse.lastcounter != mouse.state.counter || mouse.resize;
}
void
mousetrack(int dx, int dy, int b, ulong msec)
{
absmousetrack(mouse.state.xy.x + dx, mouse.state.xy.y + dy, b, msec);
}
void
absmousetrack(int x, int y, int b, ulong msec)
{
int lastb;
if(gscreen==nil)
return;
if(x < gscreen->clipr.min.x)
x = gscreen->clipr.min.x;
if(x >= gscreen->clipr.max.x)
x = gscreen->clipr.max.x-1;
if(y < gscreen->clipr.min.y)
y = gscreen->clipr.min.y;
if(y >= gscreen->clipr.max.y)
y = gscreen->clipr.max.y-1;
lock(&mouse.lk);
mouse.state.xy = Pt(x, y);
lastb = mouse.state.buttons;
mouse.state.buttons = b;
mouse.state.msec = msec;
mouse.state.counter++;
/*
* if the queue fills, don't queue any more events until a
* reader polls the mouse.
*/
if(b != lastb && (mouse.wi-mouse.ri) < nelem(mouse.queue))
mouse.queue[mouse.wi++ % nelem(mouse.queue)] = mouse.state;
unlock(&mouse.lk);
wakeup(&mouse.r);
}
Dev mousedevtab = {
'm',
"mouse",
devreset,
mouseinit,
devshutdown,
mouseattach,
mousewalk,
mousestat,
mouseopen,
devcreate,
mouseclose,
mouseread,
devbread,
mousewrite,
devbwrite,
devremove,
devwstat,
};