My dwm config.
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void
floatpos(const Arg *arg)
{
Client *c = selmon->sel;
if (!c || (selmon->lt[selmon->sellt]->arrange && !c->isfloating))
return;
setfloatpos(c, (char *)arg->v);
resizeclient(c, c->x, c->y, c->w, c->h);
#if !FOCUSONCLICK_PATCH
XRaiseWindow(dpy, c->win);
XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w/2, c->h/2);
#endif // FOCUSONCLICK_PATCH
}
void
setfloatpos(Client *c, const char *floatpos)
{
char xCh, yCh, wCh, hCh;
int x, y, w, h, wx, ww, wy, wh;
#if FLOATPOS_RESPECT_GAPS_PATCH && VANITYGAPS_PATCH
int oh, ov, ih, iv;
unsigned int n;
#endif // FLOATPOS_RESPECT_GAPS_PATCH | VANITYGAPS_PATCH
if (!c || !floatpos)
return;
if (selmon->lt[selmon->sellt]->arrange && !c->isfloating)
return;
switch(sscanf(floatpos, "%d%c %d%c %d%c %d%c", &x, &xCh, &y, &yCh, &w, &wCh, &h, &hCh)) {
case 4:
if (xCh == 'w' || xCh == 'W') {
w = x; wCh = xCh;
h = y; hCh = yCh;
x = -1; xCh = 'C';
y = -1; yCh = 'C';
} else if (xCh == 'p' || xCh == 'P') {
w = x; wCh = xCh;
h = y; hCh = yCh;
x = 0; xCh = 'G';
y = 0; yCh = 'G';
} else if (xCh == 'm' || xCh == 'M') {
getrootptr(&x, &y);
} else {
w = 0; wCh = 0;
h = 0; hCh = 0;
}
break;
case 8:
if (xCh == 'm' || xCh == 'M')
getrootptr(&x, &y);
break;
default:
return;
}
#if FLOATPOS_RESPECT_GAPS_PATCH && VANITYGAPS_PATCH
getgaps(c->mon, &oh, &ov, &ih, &iv, &n);
wx = c->mon->wx + ov;
wy = c->mon->wy + oh;
ww = c->mon->ww - 2*ov;
wh = c->mon->wh - 2*oh;
#else
wx = c->mon->wx;
wy = c->mon->wy;
ww = c->mon->ww;
wh = c->mon->wh;
#endif // FLOATPOS_RESPECT_GAPS_PATCH | VANITYGAPS_PATCH
getfloatpos(x, xCh, w, wCh, wx, ww, c->x, c->w, c->bw, floatposgrid_x, &c->x, &c->w);
getfloatpos(y, yCh, h, hCh, wy, wh, c->y, c->h, c->bw, floatposgrid_y, &c->y, &c->h);
}
/* p - position, s - size, cp and cs represents current position and size */
void
getfloatpos(int pos, char pCh, int size, char sCh, int min_p, int max_s, int cp, int cs, int cbw, int defgrid, int *out_p, int *out_s)
{
int abs_p, abs_s, i, delta, rest;
abs_p = pCh == 'A' || pCh == 'a';
abs_s = sCh == 'A' || sCh == 'a';
cs += 2*cbw;
switch(pCh) {
case 'A': // absolute position
cp = pos;
break;
case 'a': // absolute relative position
cp += pos;
break;
case 'y':
case 'x': // client relative position
cp = MIN(cp + pos, min_p + max_s);
break;
case 'Y':
case 'X': // client position relative to monitor
cp = min_p + MIN(pos, max_s);
break;
case 'S': // fixed client position (sticky)
case 'C': // fixed client position (center)
case 'Z': // fixed client right-hand position (position + size)
if (pos == -1)
break;
pos = MAX(MIN(pos, max_s), 0);
if (pCh == 'Z')
cs = abs((cp + cs) - (min_p + pos));
else if (pCh == 'C')
cs = abs((cp + cs / 2) - (min_p + pos));
else
cs = abs(cp - (min_p + pos));
cp = min_p + pos;
sCh = 0; // size determined by position, override defined size
break;
case 'G': // grid
if (pos <= 0)
pos = defgrid; // default configurable
if (size == 0 || pos < 2 || (sCh != 'p' && sCh != 'P'))
break;
delta = (max_s - cs) / (pos - 1);
rest = max_s - cs - delta * (pos - 1);
if (sCh == 'P') {
if (size < 1 || size > pos)
break;
cp = min_p + delta * (size - 1);
} else {
for (i = 0; i < pos && cp >= min_p + delta * i + (i > pos - rest ? i + rest - pos + 1 : 0); i++);
cp = min_p + delta * (MAX(MIN(i + size, pos), 1) - 1) + (i > pos - rest ? i + rest - pos + 1 : 0);
}
break;
}
switch(sCh) {
case 'A': // absolute size
cs = size;
break;
case 'a': // absolute relative size
cs = MAX(1, cs + size);
break;
case '%': // client size percentage in relation to monitor window area size
if (size <= 0)
break;
size = max_s * MIN(size, 100) / 100;
/* falls through */
case 'h':
case 'w': // size relative to client
if (sCh == 'w' || sCh == 'h') {
if (size == 0)
break;
size += cs;
}
/* falls through */
case 'H':
case 'W': // normal size, position takes precedence
if (pCh == 'S' && cp + size > min_p + max_s)
size = min_p + max_s - cp;
else if (size > max_s)
size = max_s;
if (pCh == 'C') { // fixed client center, expand or contract client
delta = size - cs;
if (delta < 0 || (cp - delta / 2 + size <= min_p + max_s))
cp -= delta / 2;
else if (cp - delta / 2 < min_p)
cp = min_p;
else if (delta)
cp = min_p + max_s;
} else if (pCh == 'Z')
cp -= size - cs;
cs = size;
break;
}
if (pCh == '%') // client mid-point position in relation to monitor window area size
cp = min_p + max_s * MAX(MIN(pos, 100), 0) / 100 - (cs) / 2;
if (pCh == 'm' || pCh == 'M')
cp = pos - cs / 2;
if (!abs_p && cp < min_p)
cp = min_p;
if (cp + cs > min_p + max_s && !(abs_p && abs_s)) {
if (abs_p || cp == min_p)
cs = min_p + max_s - cp;
else
cp = min_p + max_s - cs;
}
*out_p = cp;
*out_s = MAX(cs - 2*cbw, 1);
}