ref: 8043614f797a269cfc9772998a3a1d46c139a1b7
dir: /sys/src/9/port/devmouse.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#define Image IMAGE
#include <draw.h>
#include <memdraw.h>
#include <cursor.h>
#include "screen.h"
enum {
ScrollUp = 0x08,
ScrollDown = 0x10,
ScrollLeft = 0x20,
ScrollRight = 0x40,
};
typedef struct Mouseinfo Mouseinfo;
typedef struct Mousestate Mousestate;
struct Mousestate
{
Point xy; /* mouse.xy */
int buttons; /* mouse.buttons */
ulong counter; /* increments every update */
ulong msec; /* time of last event */
};
struct Mouseinfo
{
Lock;
Mousestate;
int redraw; /* update cursor on screen */
Rendez redrawr; /* wait for cursor screen updates */
ulong lastcounter; /* value when /dev/mouse read */
ulong lastresize;
ulong resize;
Rendez r;
Ref;
int open;
int acceleration;
int maxacc;
Mousestate queue[16]; /* circular buffer of click events */
int ri; /* read index into queue */
int wi; /* write index into queue */
uchar qfull; /* queue is full */
};
enum
{
CMbuttonmap,
CMscrollswap,
CMswap,
CMtwitch,
CMwildcard,
};
static Cmdtab mousectlmsg[] =
{
CMbuttonmap, "buttonmap", 0,
CMscrollswap, "scrollswap", 0,
CMswap, "swap", 1,
CMtwitch, "twitch", 0,
CMwildcard, "*", 0,
};
Mouseinfo mouse;
Cursorinfo cursor;
int mouseshifted;
Cursor curs;
int mouseinbuttons;
void Cursortocursor(Cursor*);
int mousechanged(void*);
void mouseredraw(void);
enum{
Qdir,
Qcursor,
Qmouse,
Qmousein,
Qmousectl,
};
static Dirtab mousedir[]={
".", {Qdir, 0, QTDIR}, 0, DMDIR|0555,
"cursor", {Qcursor}, 0, 0666,
"mouse", {Qmouse}, 0, 0666,
"mousein", {Qmousein}, 0, 0220,
"mousectl", {Qmousectl}, 0, 0220,
};
static uchar buttonmap[8] = {
0, 1, 2, 3, 4, 5, 6, 7,
};
static int mouseswap;
static int scrollswap;
static ulong mousetime;
extern Memimage* gscreen;
Cursor arrow = {
{ -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 void
mousereset(void)
{
if(!conf.monitor)
return;
curs = arrow;
Cursortocursor(&arrow);
}
static int
mousedevgen(Chan *c, char *name, Dirtab *tab, int ntab, int i, Dir *dp)
{
int rc;
rc = devgen(c, name, tab, ntab, i, dp);
if(rc != -1)
dp->atime = mousetime;
return rc;
}
static void mouseproc(void*);
static void
mouseinit(void)
{
if(!conf.monitor)
return;
curs = arrow;
Cursortocursor(&arrow);
cursoron();
mousetime = seconds();
kproc("mouse", mouseproc, 0);
}
static Chan*
mouseattach(char *spec)
{
if(!conf.monitor)
error(Egreg);
return devattach('m', spec);
}
static Walkqid*
mousewalk(Chan *c, Chan *nc, char **name, int nname)
{
Walkqid *wq;
/*
* We use devgen() and not mousedevgen() here
* see "Ugly problem" in dev.c/devwalk()
*/
wq = devwalk(c, nc, name, nname, mousedir, nelem(mousedir), devgen);
if(wq != nil && wq->clone != c && wq->clone != nil && (wq->clone->qid.type&QTDIR)==0)
incref(&mouse);
return wq;
}
static int
mousestat(Chan *c, uchar *db, int n)
{
return devstat(c, db, n, mousedir, nelem(mousedir), mousedevgen);
}
static Chan*
mouseopen(Chan *c, int omode)
{
int mode;
mode = openmode(omode);
switch((ulong)c->qid.path){
case Qdir:
if(omode != OREAD)
error(Eperm);
break;
case Qmouse:
lock(&mouse);
if(mouse.open){
unlock(&mouse);
error(Einuse);
}
mouse.open = 1;
mouse.ref++;
mouse.lastresize = mouse.resize;
unlock(&mouse);
break;
case Qmousein:
if(!iseve())
error(Eperm);
c->aux = malloc(sizeof(Mousestate));
if(c->aux == nil)
error(Enomem);
break;
default:
incref(&mouse);
}
c->mode = mode;
c->flag |= COPEN;
c->offset = 0;
return c;
}
static Chan*
mousecreate(Chan*, char*, int, ulong)
{
if(!conf.monitor)
error(Egreg);
error(Eperm);
return 0;
}
static void
mouseclose(Chan *c)
{
if((c->qid.type&QTDIR)==0 && (c->flag&COPEN)){
lock(&mouse);
if(c->qid.path == Qmouse)
mouse.open = 0;
else if(c->qid.path == Qmousein){
unlock(&mouse);
mouseinbuttons &= ~((Mousestate*)c->aux)->buttons;
free(c->aux); /* Mousestate */
c->aux = nil;
return;
}
if(--mouse.ref != 0){
unlock(&mouse);
return;
}
unlock(&mouse);
cursoroff();
curs = arrow;
Cursortocursor(&arrow);
cursoron();
}
}
static long
mouseread(Chan *c, void *va, long n, vlong off)
{
char buf[1+4*12+1];
uchar *p;
static int map[8] = {0, 4, 2, 6, 1, 5, 3, 7 };
ulong offset = off;
Mousestate m;
int b;
p = va;
switch((ulong)c->qid.path){
case Qdir:
return devdirread(c, va, n, mousedir, nelem(mousedir), mousedevgen);
case Qcursor:
if(offset != 0)
return 0;
if(n < 2*4+2*2*16)
error(Eshort);
n = 2*4+2*2*16;
lock(&cursor);
BPLONG(p+0, curs.offset.x);
BPLONG(p+4, curs.offset.y);
memmove(p+8, curs.clr, 2*16);
memmove(p+40, curs.set, 2*16);
unlock(&cursor);
return n;
case Qmouse:
while(mousechanged(0) == 0)
sleep(&mouse.r, mousechanged, 0);
mouse.qfull = 0;
mousetime = seconds();
/*
* No lock of the indices is necessary here, because ri is only
* updated by us, and there is only one mouse reader
* at a time. I suppose that more than one process
* could try to read the fd at one time, but such behavior
* is degenerate and already violates the calling
* conventions for sleep above.
*/
if(mouse.ri != mouse.wi) {
m = mouse.queue[mouse.ri];
if(++mouse.ri == nelem(mouse.queue))
mouse.ri = 0;
} else {
while(!canlock(&cursor))
tsleep(&up->sleep, return0, 0, TK2MS(1));
m = mouse.Mousestate;
unlock(&cursor);
}
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 %11lud ",
m.xy.x, m.xy.y,
b,
m.msec);
mouse.lastcounter = m.counter;
if(n > 1+4*12)
n = 1+4*12;
if(mouse.lastresize != mouse.resize){
mouse.lastresize = mouse.resize;
buf[0] = 'r';
}
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;
}
}
static long
mousewrite(Chan *c, void *va, long n, vlong)
{
char *p;
Point pt;
Cmdbuf *cb;
Cmdtab *ct;
char buf[64];
int b, z, msec;
Mousestate *m;
p = va;
switch((ulong)c->qid.path){
case Qdir:
error(Eisdir);
case Qcursor:
cursoroff();
if(n < 2*4+2*2*16){
curs = arrow;
Cursortocursor(&arrow);
}else{
n = 2*4+2*2*16;
curs.offset.x = BGLONG(p+0);
curs.offset.y = BGLONG(p+4);
memmove(curs.clr, p+8, 2*16);
memmove(curs.set, p+40, 2*16);
Cursortocursor(&curs);
}
cursoron();
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;
case CMtwitch:
drawactive(1);
break;
case CMwildcard:
mousectl(cb);
break;
}
free(cb);
poperror();
return n;
case Qmousein:
if(n > sizeof buf-1)
n = sizeof buf -1;
memmove(buf, va, n);
buf[n] = 0;
p = 0;
pt.x = strtol(buf+1, &p, 0);
if(*p == 0)
error(Eshort);
pt.y = strtol(p, &p, 0);
if(*p == 0)
error(Eshort);
b = strtol(p, &p, 0);
msec = strtol(p, &p, 0);
if(msec == 0)
msec = TK2MS(MACHP(0)->ticks);
/* exclude wheel */
z = b & (8|16);
b ^= z;
m = (Mousestate*)c->aux;
m->xy = pt;
m->msec = msec;
b ^= m->buttons;
m->buttons ^= b;
mouseinbuttons = (m->buttons & b) | (mouseinbuttons & ~b);
b = mouse.buttons & ~b;
/* include wheel */
b &= ~(8|16);
b ^= z;
if(buf[0] == 'A')
absmousetrack(pt.x, pt.y, b, msec);
else
mousetrack(pt.x, pt.y, b, msec);
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(gscreen != nil && ptinrect(pt, gscreen->r)){
mouse.xy = pt;
mousetrack(0, 0, mouse.buttons, TK2MS(MACHP(0)->ticks));
}
return n;
}
error(Egreg);
return -1;
}
Dev mousedevtab = {
'm',
"mouse",
mousereset,
mouseinit,
devshutdown,
mouseattach,
mousewalk,
mousestat,
mouseopen,
mousecreate,
mouseclose,
mouseread,
devbread,
mousewrite,
devbwrite,
devremove,
devwstat,
};
void
Cursortocursor(Cursor *c)
{
qlock(&drawlock);
lock(&cursor);
memmove(&cursor.Cursor, c, sizeof(Cursor));
setcursor(c);
unlock(&cursor);
qunlock(&drawlock);
}
static int
shouldredraw(void*)
{
return mouse.redraw != 0;
}
/*
* process that redraws the cursor
*/
static void
mouseproc(void*)
{
ulong counter;
counter = ~0;
while(waserror())
;
for(;;){
if(mouse.redraw){
mouse.redraw = 0;
cursoroff();
cursoron();
}
drawactive(mouse.counter != counter);
counter = mouse.counter;
tsleep(&mouse.redrawr, shouldredraw, 0, 20*1000);
}
}
static int
scale(int x)
{
int sign = 1;
if(x < 0){
sign = -1;
x = -x;
}
switch(x){
case 0:
case 1:
case 2:
case 3:
break;
case 4:
x = 6 + (mouse.acceleration>>2);
break;
case 5:
x = 9 + (mouse.acceleration>>1);
break;
default:
x *= mouse.maxacc;
break;
}
return sign*x;
}
/*
* called at interrupt level to update the structure and
* awaken any waiting procs.
*/
void
mousetrack(int dx, int dy, int b, int msec)
{
if(mouse.acceleration){
dx = scale(dx);
dy = scale(dy);
}
absmousetrack(mouse.xy.x + dx, mouse.xy.y + dy, b, msec);
}
void
absmousetrack(int x, int y, int b, int 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;
if(y < gscreen->clipr.min.y)
y = gscreen->clipr.min.y;
if(y >= gscreen->clipr.max.y)
y = gscreen->clipr.max.y;
b |= mouseinbuttons;
lastb = mouse.buttons;
mouse.xy = Pt(x, y);
mouse.buttons = b;
mouse.counter++;
mouse.msec = msec;
/*
* if the queue fills, we discard the entire queue and don't
* queue any more events until a reader polls the mouse.
*/
if(!mouse.qfull && lastb != b) { /* add to ring */
mouse.queue[mouse.wi] = mouse.Mousestate;
if(++mouse.wi == nelem(mouse.queue))
mouse.wi = 0;
if(mouse.wi == mouse.ri)
mouse.qfull = 1;
}
wakeup(&mouse.r);
mouseredraw();
}
/*
* microsoft 3 button, 7 bit bytes
*
* byte 0 - 1 L R Y7 Y6 X7 X6
* byte 1 - 0 X5 X4 X3 X2 X1 X0
* byte 2 - 0 Y5 Y4 Y3 Y2 Y1 Y0
* byte 3 - 0 M x x x x x (optional)
*
* shift & right button is the same as middle button (for 2 button mice)
*/
int
m3mouseputc(Queue*, int c)
{
static uchar msg[3];
static int nb;
static int middle;
static uchar b[] = { 0, 4, 1, 5, 0, 2, 1, 3 };
short x;
int dx, dy, newbuttons;
static ulong lasttick;
ulong m;
/* Resynchronize in stream with timing. */
m = MACHP(0)->ticks;
if(TK2SEC(m - lasttick) > 2)
nb = 0;
lasttick = m;
if(nb==0){
/*
* an extra byte comes for middle button motion.
* only two possible values for the extra byte.
*/
if(c == 0x00 || c == 0x20){
/* an extra byte gets sent for the middle button */
middle = (c&0x20) ? 2 : 0;
newbuttons = (mouse.buttons & ~2) | middle;
mousetrack(0, 0, newbuttons, TK2MS(MACHP(0)->ticks));
return 0;
}
}
msg[nb] = c;
if(++nb == 3){
nb = 0;
newbuttons = middle | b[(msg[0]>>4)&3 | (mouseshifted ? 4 : 0)];
x = (msg[0]&0x3)<<14;
dx = (x>>8) | msg[1];
x = (msg[0]&0xc)<<12;
dy = (x>>8) | msg[2];
mousetrack(dx, dy, newbuttons, TK2MS(MACHP(0)->ticks));
}
return 0;
}
/*
* microsoft intellimouse 3 buttons + scroll
* byte 0 - 1 L R Y7 Y6 X7 X6
* byte 1 - 0 X5 X4 X3 X2 X1 X0
* byte 2 - 0 Y5 Y4 Y3 Y2 Y1 Y0
* byte 3 - 0 0 M % % % %
*
* %: 0xf => U , 0x1 => D
*
* L: left
* R: right
* U: up
* D: down
*/
int
m5mouseputc(Queue*, int c)
{
static uchar msg[3];
static int nb;
static ulong lasttick;
ulong m;
/* Resynchronize in stream with timing. */
m = MACHP(0)->ticks;
if(TK2SEC(m - lasttick) > 2)
nb = 0;
lasttick = m;
msg[nb++] = c & 0x7f;
if (nb == 4) {
schar dx,dy,newbuttons;
dx = msg[1] | (msg[0] & 0x3) << 6;
dy = msg[2] | (msg[0] & 0xc) << 4;
newbuttons =
(msg[0] & 0x10) >> (mouseshifted ? 3 : 2)
| (msg[0] & 0x20) >> 5
| ( msg[3] == 0x10 ? 0x02 :
msg[3] == 0x0f ? ScrollUp :
msg[3] == 0x01 ? ScrollDown : 0 );
mousetrack(dx, dy, newbuttons, TK2MS(MACHP(0)->ticks));
nb = 0;
}
return 0;
}
/*
* Logitech 5 byte packed binary mouse format, 8 bit bytes
*
* shift & right button is the same as middle button (for 2 button mice)
*/
int
mouseputc(Queue*, int c)
{
static short msg[5];
static int nb;
static uchar b[] = {0, 4, 2, 6, 1, 5, 3, 7, 0, 2, 2, 6, 1, 3, 3, 7};
int dx, dy, newbuttons;
static ulong lasttick;
ulong m;
/* Resynchronize in stream with timing. */
m = MACHP(0)->ticks;
if(TK2SEC(m - lasttick) > 2)
nb = 0;
lasttick = m;
if((c&0xF0) == 0x80)
nb=0;
msg[nb] = c;
if(c & 0x80)
msg[nb] |= ~0xFF; /* sign extend */
if(++nb == 5){
newbuttons = b[((msg[0]&7)^7) | (mouseshifted ? 8 : 0)];
dx = msg[1]+msg[3];
dy = -(msg[2]+msg[4]);
mousetrack(dx, dy, newbuttons, TK2MS(MACHP(0)->ticks));
nb = 0;
}
return 0;
}
int
mousechanged(void*)
{
return mouse.lastcounter != mouse.counter ||
mouse.lastresize != mouse.resize;
}
Point
mousexy(void)
{
return mouse.xy;
}
void
mouseaccelerate(int x)
{
mouse.acceleration = x;
if(mouse.acceleration < 3)
mouse.maxacc = 2;
else
mouse.maxacc = mouse.acceleration;
}
/*
* notify reader that screen has been resized
*/
void
mouseresize(void)
{
mouse.resize++;
wakeup(&mouse.r);
}
void
mouseredraw(void)
{
mouse.redraw = 1;
wakeup(&mouse.redrawr);
}