void
writecolmap(Display *d, RGB *m)
{
int i, n, fd;
char buf[64], *t;
ulong r, g, b;
sprint(buf, "/dev/draw/%d/colormap", d->dirno);
fd = open(buf, OWRITE);
if(fd < 0)
drawerror(d, "writecolmap: open colormap failed");
t = malloc(8192);
if (t == nil)
drawerror(d, "writecolmap: no memory");
n = 0;
for(i = 0; i < 256; i++) {
r = m[i].red>>24;
g = m[i].green>>24;
b = m[i].blue>>24;
n += sprint(t+n, "%d %lud %lud %lud\n", 255-i, r, g, b);
}
i = write(fd, t, n);
free(t);
close(fd);
if(i != n)
drawerror(d, "writecolmap: bad write");
}
int
_frcanfit(Frame *f, Point pt, Frbox *b)
{
int left, w, nr;
uchar *p;
Rune r;
left = f->r.max.x-pt.x;
if(b->nrune < 0)
return b->minwid <= left;
if(left >= b->wid)
return b->nrune;
for(nr=0,p=b->ptr; *p; p+=w,nr++){
r = *p;
if(r < Runeself)
w = 1;
else
w = chartorune(&r, (char*)p);
left -= stringnwidth(f->font, (char*)p, 1);
if(left < 0)
return nr;
}
drawerror(f->display, "_frcanfit can't");
return 0;
}
int
ecanmouse(void)
{
if(Smouse < 0)
drawerror(display, "events: mouse not initialized");
return ecanread(Emouse);
}
static int
eforkslave(ulong key)
{
int i, pid;
for(i=0; i<MAXSLAVE; i++)
if((key & ~(1<<i)) == 0 && eslave[i].pid == 0){
if(nslave <= i)
nslave = i + 1;
/*
* share the file descriptors so the last child
* out closes all connections to the window server.
*/
switch(pid = rfork(RFPROC)){
case 0:
return MAXSLAVE+i;
case -1:
fprint(2, "events: fork error\n");
exits("fork");
}
eslave[i].pid = pid;
eslave[i].head = eslave[i].tail = 0;
return i;
}
drawerror(display, "events: bad slave assignment");
return 0;
}
Point
_frdraw(Frame *f, Point pt)
{
Frbox *b;
int nb, n;
for(b=f->box,nb=0; nb<f->nbox; nb++, b++) {
_frcklinewrap0(f, &pt, b);
if(pt.y == f->r.max.y) {
f->nchars -= _frstrlen(f, nb);
_frdelbox(f, nb, f->nbox-1);
break;
}
if(b->nrune > 0) {
n = _frcanfit(f, pt, b);
if(n == 0)
drawerror(f->display, "_frcanfit==0");
if(n != b->nrune) {
_frsplitbox(f, nb, n);
b = &f->box[nb];
}
pt.x += b->wid;
} else {
if(b->bc == '\n') {
pt.x = f->r.min.x;
pt.y+=f->font->height;
} else
pt.x += _frnewwid(f, pt, b);
}
}
return pt;
}
Mouse
emouse(void)
{
Mouse m;
Ebuf *eb;
static but[2];
int b;
if(Smouse < 0)
drawerror(display, "events: mouse not initialized");
for(;;){
eb = ebread(&eslave[Smouse]);
if(!ecanmouse())
break;
free(eb); /* drop queued mouse events */
}
m.xy.x = atoi((char*)eb->buf+1+0*12);
m.xy.y = atoi((char*)eb->buf+1+1*12);
b = atoi((char*)eb->buf+1+2*12);
m.buttons = b;
m.msec = atoi((char*)eb->buf+1+3*12);
if (logfid)
fprint(logfid, "b: %d xy: %P\n", m.buttons, m.xy);
free(eb);
return m;
}
int
ecankbd(void)
{
if(Skeyboard < 0)
drawerror(display, "events: keyboard not initialzed");
return ecanread(Ekeyboard);
}
ulong
etimer(ulong key, int n)
{
if(Stimer != -1)
drawerror(display, "events: timer started twice");
Stimer = newkey(key);
if(n <= 0)
n = 1000;
eslave[Stimer].n = n;
eslave[Stimer].nexttick = nsec()+n*1000000LL;
return 1<<Stimer;
}
int
ekbd(void)
{
Ebuf *eb;
int c;
if(Skeyboard < 0)
drawerror(display, "events: keyboard not initialzed");
eb = ebread(&eslave[Skeyboard]);
c = eb->u.rune;
free(eb);
return c;
}
Mouse
emouse(void)
{
Mouse m;
Ebuf *eb;
if(Smouse < 0)
drawerror(display, "events: mouse not initialized");
eb = ebread(&eslave[Smouse]);
m = eb->u.mouse;
free(eb);
return m;
}
int
ekbd(void)
{
Ebuf *eb;
Rune r;
if(Skeyboard < 0)
drawerror(display, "events: keyboard not initialzed");
eb = ebread(&eslave[Skeyboard]);
chartorune(&r, (char*)eb->buf);
free(eb);
return r;
}
void
einit(ulong keys)
{
int ctl, fd;
char buf[256];
parentpid = getpid();
if(pipe(epipe) < 0)
drawerror(display, "events: einit pipe");
atexit(ekill);
atnotify(enote, 1);
snprint(buf, sizeof buf, "%s/mouse", display->devdir);
mousefd = open(buf, ORDWR|OCEXEC);
if(mousefd < 0)
drawerror(display, "einit: can't open mouse\n");
snprint(buf, sizeof buf, "%s/cursor", display->devdir);
cursorfd = open(buf, ORDWR|OCEXEC);
if(cursorfd < 0)
drawerror(display, "einit: can't open cursor\n");
if(keys&Ekeyboard){
snprint(buf, sizeof buf, "%s/cons", display->devdir);
fd = open(buf, OREAD);
if(fd < 0)
drawerror(display, "events: can't open console");
snprint(buf, sizeof buf, "%s/consctl", display->devdir);
ctl = open("/dev/consctl", OWRITE|OCEXEC);
if(ctl < 0)
drawerror(display, "events: can't open consctl");
write(ctl, "rawon", 5);
for(Skeyboard=0; Ekeyboard & ~(1<<Skeyboard); Skeyboard++)
;
ekeyslave(fd);
}
if(keys&Emouse){
estart(Emouse, mousefd, 1+4*12);
for(Smouse=0; Emouse & ~(1<<Smouse); Smouse++)
;
}
}
static int
newkey(ulong key)
{
int i;
for(i=0; i<MAXSLAVE; i++)
if((key & ~(1<<i)) == 0 && eslave[i].inuse == 0){
if(nslave <= i)
nslave = i + 1;
eslave[i].inuse = 1;
return i;
}
drawerror(display, "events: bad slave assignment");
return 0;
}
ulong
estartfn(ulong key, int fd, int n, int (*fn)(int, Event*, uchar*, int))
{
int i;
if(fd < 0)
drawerror(display, "events: bad file descriptor");
if(n <= 0 || n > EMAXMSG)
n = EMAXMSG;
i = newkey(key);
eslave[i].fn = fn;
eslave[i].fd = fd;
eslave[i].n = n;
return 1<<i;
}
static Ebuf*
newebuf(Slave *s, int n)
{
Ebuf *eb;
eb = malloc(sizeof(*eb) - sizeof(eb->u.buf) + n);
if(eb == nil)
drawerror(display, "events: out of memory");
eb->n = n;
eb->next = 0;
if(s->head)
s->tail = s->tail->next = eb;
else
s->head = s->tail = eb;
return eb;
}
int
ecanread(ulong keys)
{
Dir *d;
int i;
ulong l;
for(;;){
for(i=0; i<nslave; i++)
if((keys & (1<<i)) && eslave[i].head)
return 1;
d = dirfstat(epipe[0]);
if(d == nil)
drawerror(display, "events: ecanread stat error");
l = d->length;
free(d);
if(l == 0)
return 0;
extract();
}
}
ulong
etimer(ulong key, int n)
{
char t[2];
if(Stimer != -1)
drawerror(display, "events: timer started twice");
Stimer = eforkslave(key);
if(Stimer < MAXSLAVE)
return 1<<Stimer;
if(n <= 0)
n = 1000;
t[0] = t[1] = Stimer - MAXSLAVE;
do
sleep(n);
while(write(epipe[1], t, 2) == 2);
t[0] = MAXSLAVE;
write(epipe[1], t, 1);
_exits(0);
return 0;
}
ulong
estartfn(ulong key, int fd, int n, int (*fn)(int, Event*, uchar*, int))
{
char buf[EMAXMSG+1];
int i, r;
if(fd < 0)
drawerror(display, "events: bad file descriptor");
if(n <= 0 || n > EMAXMSG)
n = EMAXMSG;
i = eforkslave(key);
if(i < MAXSLAVE){
eslave[i].fn = fn;
return 1<<i;
}
buf[0] = i - MAXSLAVE;
while((r = read(fd, buf+1, n))>0)
if(write(epipe[1], buf, r+1)!=r+1)
break;
buf[0] = MAXSLAVE;
write(epipe[1], buf, 1);
_exits(0);
return 0;
}
static int
extract(int canblock)
{
Ebuf *eb;
int i, n, max;
fd_set rset, wset, xset;
struct timeval tv, *timeout;
Wsysmsg w;
vlong t0;
/*
* Flush draw buffer before waiting for responses.
* Avoid doing so if buffer is empty.
* Also make sure that we don't interfere with app-specific locking.
*/
if(display->locking){
/*
* if locking is being done by program,
* this means it can't depend on automatic
* flush in emouse() etc.
*/
if(canqlock(&display->qlock)){
if(display->bufp > display->buf)
flushimage(display, 1);
unlockdisplay(display);
}
}else
if(display->bufp > display->buf)
flushimage(display, 1);
/*
* Set up for select.
*/
FD_ZERO(&rset);
FD_ZERO(&wset);
FD_ZERO(&xset);
max = -1;
timeout = nil;
for(i=0; i<nslave; i++){
if(!eslave[i].inuse)
continue;
if(i == Smouse){
if(eslave[i].rpc == nil)
eslave[i].rpc = startrpc(Trdmouse);
if(eslave[i].rpc){
/* if ready, don't block in select */
if(eslave[i].rpc->p)
canblock = 0;
FD_SET(display->srvfd, &rset);
FD_SET(display->srvfd, &xset);
if(display->srvfd > max)
max = display->srvfd;
}
}else if(i == Skeyboard){
if(eslave[i].rpc == nil)
eslave[i].rpc = startrpc(Trdkbd);
if(eslave[i].rpc){
/* if ready, don't block in select */
if(eslave[i].rpc->p)
canblock = 0;
FD_SET(display->srvfd, &rset);
FD_SET(display->srvfd, &xset);
if(display->srvfd > max)
max = display->srvfd;
}
}else if(i == Stimer){
t0 = nsec();
if(t0 >= eslave[i].nexttick){
tv.tv_sec = 0;
tv.tv_usec = 0;
}else{
tv.tv_sec = (eslave[i].nexttick-t0)/1000000000;
tv.tv_usec = (eslave[i].nexttick-t0)%1000000000 / 1000;
}
timeout = &tv;
}else{
FD_SET(eslave[i].fd, &rset);
FD_SET(eslave[i].fd, &xset);
if(eslave[i].fd > max)
max = eslave[i].fd;
}
}
if(!canblock){
tv.tv_sec = 0;
tv.tv_usec = 0;
timeout = &tv;
}
if(select(max+1, &rset, &wset, &xset, timeout) < 0)
drawerror(display, "select failure");
/*
* Look to see what can proceed.
*/
n = 0;
for(i=0; i<nslave; i++){
if(!eslave[i].inuse)
continue;
if(i == Smouse){
if(finishrpc(eslave[i].rpc, &w)){
eslave[i].rpc = nil;
eb = newebuf(&eslave[i], sizeof(Mouse));
_drawmouse = w.mouse;
eb->u.mouse = w.mouse;
if(w.resized)
eresized(1);
n++;
}
}else if(i == Skeyboard){
if(finishrpc(eslave[i].rpc, &w)){
eslave[i].rpc = nil;
eb = newebuf(&eslave[i], sizeof(Rune)+2); /* +8: alignment */
eb->u.rune = w.rune;
n++;
}
}else if(i == Stimer){
t0 = nsec();
while(t0 > eslave[i].nexttick){
eslave[i].nexttick += eslave[i].n*1000000LL;
eslave[i].head = (Ebuf*)1;
n++;
}
}else{
if(FD_ISSET(eslave[i].fd, &rset)){
eb = newebuf(&eslave[i], eslave[i].n);
eb->n = read(eslave[i].fd, eb->u.buf, eslave[i].n);
n++;
}
}
}
return n;
}
static void
extract(void)
{
Slave *s;
Ebuf *eb;
int i, n;
uchar ebuf[EMAXMSG+1];
/* avoid generating a message if there's nothing to show. */
/* this test isn't perfect, though; could do flushimage(display, 0) then call extract */
/* also: make sure we don't interfere if we're multiprocessing the display */
if(display->locking){
/* if locking is being done by program, this means it can't depend on automatic flush in emouse() etc. */
if(canqlock(&display->qlock)){
if(display->bufp > display->buf)
flushimage(display, 1);
unlockdisplay(display);
}
}else
if(display->bufp > display->buf)
flushimage(display, 1);
loop:
if((n=read(epipe[0], ebuf, EMAXMSG+1)) < 0
|| ebuf[0] >= MAXSLAVE)
drawerror(display, "eof on event pipe");
if(n == 0)
goto loop;
i = ebuf[0];
if(i >= nslave || n <= 1)
drawerror(display, "events: protocol error: short read");
s = &eslave[i];
if(i == Stimer){
s->head = (Ebuf *)1;
return;
}
if(i == Skeyboard && n != (1+UTFmax))
drawerror(display, "events: protocol error: keyboard");
if(i == Smouse){
if(n < 1+1+2*12)
drawerror(display, "events: protocol error: mouse");
if(ebuf[1] == 'r')
eresized(1);
/* squash extraneous mouse events */
if((eb=s->tail) && memcmp(eb->buf+1+2*12, ebuf+1+1+2*12, 12)==0){
memmove(eb->buf, &ebuf[1], n - 1);
return;
}
}
/* try to save space by only allocating as much buffer as we need */
eb = malloc(sizeof(*eb) - sizeof(eb->buf) + n - 1);
if(eb == 0)
drawerror(display, "events: protocol error 4");
eb->n = n - 1;
memmove(eb->buf, &ebuf[1], n - 1);
eb->next = 0;
if(s->head)
s->tail->next = eb;
else
s->head = eb;
s->tail = eb;
}
