dotfiles/suckless/dwm/patch/moveresize.c

void
moveresize(const Arg *arg) {
	/* only floating windows can be moved */
	Client *c;
	c = selmon->sel;
	int x, y, w, h, nx, ny, nw, nh, ox, oy, ow, oh;
	char xAbs, yAbs, wAbs, hAbs;
	int msx, msy, dx, dy, nmx, nmy;
	unsigned int dui;
	Window dummy;

	if (!c || !arg)
		return;
	if (selmon->lt[selmon->sellt]->arrange && !c->isfloating)
		return;
	if (sscanf((char *)arg->v, "%d%c %d%c %d%c %d%c", &x, &xAbs, &y, &yAbs, &w, &wAbs, &h, &hAbs) != 8)
		return;

	/* compute new window position; prevent window from be positioned outside the current monitor */
	nw = c->w + w;
	if (wAbs == 'W')
		nw = w < selmon->mw - 2 * c->bw ? w : selmon->mw - 2 * c->bw;

	nh = c->h + h;
	if (hAbs == 'H')
		nh = h < selmon->mh - 2 * c->bw ? h : selmon->mh - 2 * c->bw;

	nx = c->x + x;
	if (xAbs == 'X') {
		if (x < selmon->mx)
			nx = selmon->mx;
		else if (x > selmon->mx + selmon->mw)
			nx = selmon->mx + selmon->mw - nw - 2 * c->bw;
		else
			nx = x;
	}

	ny = c->y + y;
	if (yAbs == 'Y') {
		if (y < selmon->my)
			ny = selmon->my;
		else if (y > selmon->my + selmon->mh)
			ny = selmon->my + selmon->mh - nh - 2 * c->bw;
		else
			ny = y;
	}

	ox = c->x;
	oy = c->y;
	ow = c->w;
	oh = c->h;

	XRaiseWindow(dpy, c->win);
	Bool xqp = XQueryPointer(dpy, root, &dummy, &dummy, &msx, &msy, &dx, &dy, &dui);
	resize(c, nx, ny, nw, nh, True);

	/* move cursor along with the window to avoid problems caused by the sloppy focus */
	if (xqp && ox <= msx && (ox + ow) >= msx && oy <= msy && (oy + oh) >= msy)
	{
		nmx = c->x - ox + c->w - ow;
		nmy = c->y - oy + c->h - oh;
		XWarpPointer(dpy, None, None, 0, 0, 0, 0, nmx, nmy);
	}
}