ref: 738be8c36f9f2765894a526f69ec043e483002b3
dir: /sys/src/cmd/riow.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <keyboard.h>
#include <ctype.h>
typedef struct W W;
enum {
Mmod4 = 1<<0,
Mctl = 1<<1,
Mshift = 1<<2,
Step = 16,
Stepbig = 64,
Fvisible = 1<<0,
Fcurrent = 1<<1,
Fsticky = 1<<2,
Ffullscreen = 1<<3,
};
struct W {
int id;
Rectangle r;
int vd;
int flags;
int stickyforced;
};
static int vd = 1; /* current virtual desktop */
static int wsys; /* rios /dev/wsys fd */
static int mod;
static W *ws, *wcur;
static int wsn;
static int vd2wcur[10] = {-1};
static char *sticky[32] = {
"bar",
nil,
};
static int
wwctl(int id, int mode)
{
char s[64];
snprint(s, sizeof(s), "/dev/wsys/%d/wctl", id);
return open(s, mode);
}
static void
wsupdate(void)
{
int i, k, n, f, seen, tn, dsn;
char s[256], *t[8];
W *newws, *w;
Dir *ds, *d;
seek(wsys, 0, 0);
if((dsn = dirreadall(wsys, &ds)) < 0)
sysfatal("/dev/wsys: %r");
newws = malloc(sizeof(W)*dsn);
wcur = nil;
for(i = 0, d = ds, w = newws; i < dsn; i++, d++){
if((f = wwctl(atoi(d->name), OREAD)) < 0)
continue;
n = read(f, s, sizeof(s)-1);
close(f);
if(n < 12)
continue;
s[n] = 0;
if((tn = tokenize(s, t, nelem(t))) < 6)
continue;
w->id = atoi(d->name);
w->r.min.x = atoi(t[0]);
w->r.min.y = atoi(t[1]);
w->r.max.x = atoi(t[2]);
w->r.max.y = atoi(t[3]);
w->vd = -1;
w->flags = 0;
w->stickyforced = 0;
/* move over the current state of the window */
for(k = 0, seen = 0; k < wsn; k++){
if(ws[k].id == w->id){
w->vd = ws[k].vd;
w->flags = ws[k].flags & ~(Fvisible|Fcurrent);
w->stickyforced = ws[k].stickyforced;
if(w->flags & Ffullscreen)
w->r = ws[k].r;
seen = 1;
break;
}
}
/* update current state */
for(k = 4; k < tn; k++){
if(strcmp(t[k], "current") == 0){
w->flags |= Fcurrent;
wcur = w;
w->vd = vd;
}else if(strcmp(t[k], "visible") == 0){
w->flags |= Fvisible;
w->vd = vd;
}
}
if(!seen){
/* not seen previously - set the new state for it */
w->vd = vd;
}
/* because a different program can run in any window we have to re-read */
w->flags &= ~Fsticky;
if(w->stickyforced){
w->flags |= Fsticky;
}else{
snprint(s, sizeof(s), "/dev/wsys/%d/label", w->id);
if((f = open(s, OREAD)) >= 0){
n = read(f, s, sizeof(s)-1);
close(f);
if(n > 0){
s[n] = 0;
for(k = 0; k < nelem(sticky) && sticky[k] != nil; k++){
if(strcmp(sticky[k], s) == 0){
w->flags |= Fsticky;
break;
}
}
}
}
}
w++;
}
free(ds);
free(ws);
ws = newws;
wsn = w - newws;
}
static void
spawn(char *s)
{
if(rfork(RFPROC|RFNOWAIT|RFNAMEG|RFENVG|RFCFDG|RFREND) == 0)
execl("/bin/rc", "rc", s, nil);
}
static void
togglefullscreen(void)
{
int f;
wsupdate();
if(wcur == nil || (f = wwctl(wcur->id, OWRITE)) < 0)
return;
wcur->flags ^= Ffullscreen;
if(wcur->flags & Ffullscreen)
fprint(f, "resize -r 0 0 9999 9999");
else
fprint(f, "resize -r %d %d %d %d", wcur->r.min.x, wcur->r.min.y, wcur->r.max.x, wcur->r.max.y);
close(f);
}
static void
togglesticky(void)
{
wsupdate();
if(wcur != nil)
wcur->stickyforced ^= 1;
}
static void
vdaction(int nvd)
{
int f, wcurf;
W *w;
if(vd == nvd)
return;
wsupdate();
if(mod == Mmod4){
wcur = nil;
wcurf = -1;
vd2wcur[vd] = -1;
for(w = ws; w < ws+wsn; w++){
if(w->flags & Fvisible)
w->vd = vd;
else if(w->vd == vd)
w->vd = -1;
if(w->flags & Fcurrent)
vd2wcur[vd] = w->id;
if(w->vd == nvd && (w->flags & Fsticky) == 0){
if((f = wwctl(w->id, OWRITE)) >= 0){
fprint(f, "unhide");
if(vd2wcur[nvd] == w->id && wcurf < 0){
wcur = w;
wcurf = f;
}else
close(f);
}
}
}
if(wcur != nil){
fprint(wcurf, "top");
fprint(wcurf, "current");
close(wcurf);
}
for(w = ws; w < ws+wsn; w++){
if(w->vd != nvd && (w->flags & (Fsticky|Fvisible)) == Fvisible){
if((f = wwctl(w->id, OWRITE)) >= 0){
fprint(f, "hide");
close(f);
}
}
}
vd = nvd;
fprint(3, "%d\n", vd);
}else if(mod == (Mmod4 | Mshift) && wcur != nil && wcur->vd != nvd){
if((f = wwctl(wcur->id, OWRITE)) >= 0){
fprint(f, "hide");
wcur->vd = nvd;
vd2wcur[nvd] = wcur->id; /* bring to the top */
wcur = nil;
close(f);
}
}
}
static void
arrowaction(int x, int y)
{
int f;
wsupdate();
if(wcur == nil || (f = wwctl(wcur->id, OWRITE)) < 0)
return;
x *= (mod & Mctl) ? Stepbig : Step;
y *= (mod & Mctl) ? Stepbig : Step;
if((mod & Mshift) == 0)
fprint(f, "move -minx %+d -miny %+d", x, y);
else
fprint(f, "resize -maxx %+d -maxy %+d -minx %+d -miny %+d", x, y, -x, -y);
close(f);
}
static void
delete(void)
{
int f;
wsupdate();
if(wcur == nil || (f = wwctl(wcur->id, OWRITE)) < 0)
return;
fprint(f, "delete");
close(f);
}
static struct {
int x, y;
}cyclectx;
static int
cyclecmp(void *a_, void *b_)
{
W *a = a_, *b = b_;
return cyclectx.x*(a->r.min.x - b->r.min.x) + cyclectx.y*(a->r.min.y - b->r.min.y);
}
static void
cycleaction(int x, int y)
{
int wcurid, i, f;
W *w, *w₀;
wsupdate();
wcurid = wcur == nil ? -1 : wcur->id;
cyclectx.x = x;
cyclectx.y = y;
qsort(ws, wsn, sizeof(*ws), cyclecmp);
w₀ = nil;
wcur = nil;
for(i = 0, w = ws; i < wsn; i++, w++){
if(w->id == wcurid){
wcur = w;
continue;
}
if((w->flags & Fsticky) != 0 || w->vd != vd)
continue;
if(w₀ == nil)
w₀ = w;
if(wcur != nil)
break;
}
if(i >= wsn)
w = w₀;
if(w == nil || (f = wwctl(w->id, OWRITE)) < 0)
return;
fprint(f, "top");
fprint(f, "current");
close(f);
wcur = w;
}
static int
keyevent(char c, Rune r)
{
if(c == 'c'){
if(r == '\n' && mod == Mmod4){
spawn("window");
return 0;
}
if(r == 'f' && mod == Mmod4){
togglefullscreen();
return 0;
}
if(r == 's' && mod == Mmod4){
togglesticky();
return 0;
}
if(r == Kup){
arrowaction(0, -1);
return 0;
}
if(r == Kdown){
arrowaction(0, 1);
return 0;
}
if(r == Kleft){
arrowaction(-1, 0);
return 0;
}
if(r == Kright){
arrowaction(1, 0);
return 0;
}
if(r == 'h' && mod == Mmod4){
cycleaction(-1, 0);
return 0;
}
if(r == 'l' && mod == Mmod4){
cycleaction(1, 0);
return 0;
}
if(r == 'j' && mod == Mmod4){
cycleaction(0, 1);
return 0;
}
if(r == 'k' && mod == Mmod4){
cycleaction(0, -1);
return 0;
}
if(r == 'Q' && mod == (Mmod4|Mshift)){
delete();
return 0;
}
if(r >= '0' && r <= '9' && (mod & Mctl) == 0){
vdaction(r - '0');
return 0;
}
}
/* skip redundant event */
if(c == 'k' && (mod & Mshift) == 0)
return 0;
/* mod4 + shift + 1…0 yields a shifted value on 'c': workaround */
if(c == 'k' && mod == (Mmod4|Mshift) && r >= '0' && r <= '9'){
vdaction(r - '0');
return 0;
}
/* don't bother to properly deal with handling shifted digit keys */
if((mod & Mshift) != 0 && (c == 'c' || c == 'k' || c == 'K'))
return ispunct(r) ? 0 : -1;
return -1;
}
static int
process(char *s)
{
char b[128], *p;
int n, o;
Rune r;
o = 0;
b[o++] = *s;
if(*s == 'k' || *s == 'K'){
mod = 0;
if(utfrune(s+1, Kmod4) != nil)
mod |= Mmod4;
if(utfrune(s+1, Kctl) != nil)
mod |= Mctl;
if(utfrune(s+1, Kshift) != nil)
mod |= Mshift;
}
for(p = s+1; *p != 0; p += n){
if((n = chartorune(&r, p)) == 1 && r == Runeerror){
/* bail out */
n = strlen(p);
memmove(b+o, p, n);
o += n;
break;
}
if((mod & Mmod4) == 0 || keyevent(*s, r) != 0){
memmove(b+o, p, n);
o += n;
}
}
b[o++] = 0;
return (o > 1 && write(1, b, o) <= 0) ? -1 : 0;
}
static void
usage(void)
{
fprint(2, "usage: %s [-s label]\n", argv0);
exits("usage");
}
void
main(int argc, char **argv)
{
char b[128];
int i, n;
for(n = 0; sticky[n] != nil; n++)
;
ARGBEGIN{
case 's':
if(n >= nelem(sticky))
sysfatal("ewwww");
sticky[n++] = EARGF(usage());
break;
default:
usage();
}ARGEND
if((wsys = open("/dev/wsys", OREAD)) < 0)
sysfatal("%r");
/* initial state */
wsupdate();
for(i = 0; i < wsn; i++)
ws[i].vd = vd;
fprint(3, "%d\n", vd);
for(;;){
if((n = read(0, b, sizeof(b)-1)) <= 0)
break;
b[n] = 0;
if(process(b) != 0)
break;
}
exits(nil);
}