<alt-Tab> for dwm

dwm.c

/* this implements <alt-Tab> for dwm, put it in config.h  */

static int alt_tab_count = 0;

/* focus and restack a client */
static void focus_restack(Client *c)
   { if (c) { focus(c); restack(selmon); } }

static void start_alt_tab(const Arg *arg)
   { alt_tab_count = 0; }

static Client *next_visible(Client *c)
{
   for(/* DO_NOTHING */; c && !ISVISIBLE(c); c=c->snext);
   return c;
}

static int count_visible(void)
{
   int count = 0;
   for (Client *c=next_visible(selmon->stack); c; c = next_visible(c->snext))
      count += 1;
   return count;
}

static Client *get_nth_client(int n)
{
   Client *c;
   for (c=next_visible(selmon->stack); c && n--; c = next_visible(c->snext));
   return c;
}

static void alt_tab(const Arg *arg)
{
   // put all of the windows back in their original focus/stack position */
   for (int i=0; i<alt_tab_count; i+=1)
      focus_restack(get_nth_client(alt_tab_count));

   // focus and restack the nth window */
   alt_tab_count = (alt_tab_count + 1) % count_visible();
   focus_restack(get_nth_client(alt_tab_count));
}

/*
static Key keys[] = {
   // ...
   { 0,       XK_Alt_L,   start_alt_tab,  {0} },
   { MODKEY,  XK_Tab,     alt_tab,        {0} },
   // ...
};
*/

Starting with windows 1, 2, 3, 4, 5...

• alt-down tab alt-up should leave 2, 1, 3, 4, 5

Starting with windows 1, 2, 3, 4, 5...

• alt-down tab tab alt-up should leave 3, 1, 2, 4, 5
• and now, <alt-Tab> toggles between 1 and 3

This is pretty neat. However... 😉 ...once you do the 0, XK_Alt_L part dwm swallows anytime you hit the left alt. Meaning, alt shortcuts in other programs just don't work anymore with the left alt.

Could this search clients throughout different tags aswell?