ref: dde3628d54073e0569bf565e6ec861e42cfa35f6
dir: /sys/src/cmd/vnc/wsys.c/
#include "vnc.h"
#include "vncv.h"
#include <cursor.h>
typedef struct Cursor Cursor;
typedef struct Mouse Mouse;
struct Mouse {
int buttons;
Point xy;
};
void
adjustwin(Vnc *v, int force)
{
int fd;
Point d;
if(force)
d = v->dim.max;
else {
/*
* limit the window to at most the vnc server's size
*/
d = subpt(screen->r.max, screen->r.min);
if(d.x > v->dim.max.x){
d.x = v->dim.max.x;
force = 1;
}
if(d.y > v->dim.max.y){
d.y = v->dim.max.y;
force = 1;
}
}
if(force) {
fd = open("/dev/wctl", OWRITE);
if(fd >= 0){
fprint(fd, "resize -dx %d -dy %d", d.x+2*Borderwidth, d.y+2*Borderwidth);
close(fd);
}
}
}
static void
resized(int first)
{
lockdisplay(display);
if(getwindow(display, Refnone) < 0)
sysfatal("internal error: can't get the window image");
if((vnc->canresize&2) == 0)
adjustwin(vnc, !autoscale && first);
unlockdisplay(display);
requestupdate(vnc, 0);
}
static Cursor dotcursor = {
{-7, -7},
{0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x03, 0xc0,
0x07, 0xe0,
0x0f, 0xf0,
0x0f, 0xf0,
0x0f, 0xf0,
0x07, 0xe0,
0x03, 0xc0,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00, },
{0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x03, 0xc0,
0x07, 0xe0,
0x07, 0xe0,
0x07, 0xe0,
0x03, 0xc0,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00, }
};
static void
mouseevent(Vnc *v, Mouse m)
{
vnclock(v);
vncwrchar(v, MMouse);
vncwrchar(v, m.buttons);
vncwrpoint(v, m.xy);
vncflush(v);
vncunlock(v);
}
void
mousewarp(Point pt)
{
pt = addpt(pt, screen->r.min);
if(fprint(mousefd, "m%d %d", pt.x, pt.y) < 0)
fprint(2, "mousefd write: %r\n");
}
void
initmouse(void)
{
char buf[1024];
snprint(buf, sizeof buf, "%s/mouse", display->devdir);
if((mousefd = open(buf, ORDWR)) < 0)
sysfatal("open %s: %r", buf);
}
enum {
EventSize = 1+4*12
};
void
readmouse(Vnc *v)
{
int cursorfd, len, n;
char buf[10*EventSize], *start, *end;
uchar curs[2*4+2*2*16];
Cursor *cs;
Mouse m;
cs = &dotcursor;
snprint(buf, sizeof buf, "%s/cursor", display->devdir);
if((cursorfd = open(buf, OWRITE)) < 0)
sysfatal("open %s: %r", buf);
BPLONG(curs+0*4, cs->offset.x);
BPLONG(curs+1*4, cs->offset.y);
memmove(curs+2*4, cs->clr, 2*2*16);
write(cursorfd, curs, sizeof curs);
resized(1);
start = end = buf;
len = 0;
for(;;){
if((n = read(mousefd, end, sizeof(buf) - (end - buf))) < 0)
sysfatal("read mouse failed");
len += n;
end += n;
while(len >= EventSize){
if(*start == 'm'){
m.xy.x = atoi(start+1);
m.xy.y = atoi(start+1+12);
m.xy = subpt(m.xy, screen->r.min);
if(autoscale){
m.xy.x *= (v->dim.max.x - v->dim.min.x) / (double)(screen->r.max.x - screen->r.min.x);
m.xy.y *= (v->dim.max.y - v->dim.min.y) / (double)(screen->r.max.y - screen->r.min.y);
}
m.buttons = atoi(start+1+2*12) & 0x1F;
if(ptinrect(m.xy, v->dim)){
mouseevent(v, m);
/* send wheel button *release* */
if ((m.buttons & 0x7) != m.buttons) {
m.buttons &= 0x7;
mouseevent(v, m);
}
}
} else
resized(0);
start += EventSize;
len -= EventSize;
}
if(start - buf > sizeof(buf) - EventSize){
memmove(buf, start, len);
start = buf;
end = start+len;
}
}
}
static int
tcs(int fd0, int fd1)
{
int pfd[2];
if(strcmp(charset, "utf-8") == 0)
goto Dup;
if(pipe(pfd) < 0)
goto Dup;
switch(rfork(RFPROC|RFFDG|RFMEM)){
case -1:
close(pfd[0]);
close(pfd[1]);
goto Dup;
case 0:
if(fd0 < 0){
dup(pfd[0], 0);
dup(fd1, 1);
close(fd1);
} else {
dup(pfd[0], 1);
dup(fd0, 0);
close(fd0);
}
close(pfd[0]);
close(pfd[1]);
execl("/bin/tcs", "tcs", fd0 < 0 ? "-f" : "-t", charset, nil);
execl("/bin/cat", "cat", nil);
_exits(0);
}
close(pfd[0]);
return pfd[1];
Dup:
return dup(fd0 < 0 ? fd1 : fd0, -1);
}
static int snarffd = -1;
static ulong snarfvers;
static int
gotsnarf(void)
{
Dir *dir;
int ret;
if(snarffd < 0 || (dir = dirfstat(snarffd)) == nil)
return 0;
ret = dir->qid.vers != snarfvers;
snarfvers = dir->qid.vers;
free(dir);
return ret;
}
void
writesnarf(Vnc *v, long n)
{
uchar buf[8192];
int fd, sfd;
long m;
vnclock(v);
fd = -1;
if((sfd = create("/dev/snarf", OWRITE, 0666)) >= 0){
fd = tcs(-1, sfd);
close(sfd);
}
if(fd < 0)
vncgobble(v, n);
else {
while(n > 0){
m = n;
if(m > sizeof(buf))
m = sizeof(buf);
vncrdbytes(v, buf, m);
n -= m;
write(fd, buf, m);
}
close(fd);
waitpid();
}
gotsnarf();
vncunlock(v);
}
char *
getsnarf(int *sz)
{
char *snarf, *p;
int fd, n, c;
*sz =0;
n = 8192;
p = snarf = malloc(n);
seek(snarffd, 0, 0);
if((fd = tcs(snarffd, -1)) >= 0){
while((c = read(fd, p, n)) > 0){
p += c;
n -= c;
*sz += c;
if (n == 0){
snarf = realloc(snarf, *sz + 8192);
p = snarf + *sz;
n = 8192;
}
}
close(fd);
waitpid();
}
return snarf;
}
void
checksnarf(Vnc *v)
{
char *snarf;
int len;
if(snarffd < 0){
snarffd = open("/dev/snarf", OREAD);
if(snarffd < 0)
sysfatal("can't open /dev/snarf: %r");
}
for(;;){
sleep(1000);
vnclock(v);
if(gotsnarf()){
snarf = getsnarf(&len);
vncwrchar(v, MCCut);
vncwrbytes(v, "pad", 3);
vncwrlong(v, len);
vncwrbytes(v, snarf, len);
vncflush(v);
free(snarf);
}
vncunlock(v);
}
}