experimental config option TTY_PERM_INVENT

Add a rudimentary experimental always-up inventory display
capability to tty when the perm_invent option is in effect.
It requires an additional 28 rows available on the terminal
underneath the bottom status line.

It hasn't been optimized for performance as of yet.

src/allmain.c

@@ -12,6 +12,10 @@
 #include <signal.h>
 #endif
 
+#ifdef TTY_PERM_INVENT
+#include "wintty.h"     /* just for define of NHW_TTYINVENT */
+#endif
+
 static void moveloop_preamble(boolean);
 static void u_calc_moveamt(int);
 #ifdef POSITIONBAR
@@ -631,6 +635,11 @@ display_gamewindows(void)
        ever having been used, use it here to pacify the Qt interface */
     start_menu(WIN_INVEN, 0U), end_menu(WIN_INVEN, (char *) 0);
 
+#ifdef TTY_PERM_INVENT
+    if (WINDOWPORT("tty") && iflags.perm_invent) {
+        g.tty_invent_win = create_nhwindow(NHW_TTYINVENT);
+    }
+#endif
 #ifdef MAC
     /* This _is_ the right place for this - maybe we will
      * have to split display_gamewindows into create_gamewindows
@@ -650,6 +659,10 @@ display_gamewindows(void)
     display_nhwindow(WIN_MESSAGE, FALSE);
     clear_glyph_buffer();
     display_nhwindow(WIN_MAP, FALSE);
+#ifdef TTY_PERM_INVENT
+    if (g.tty_invent_win != WIN_ERR)
+        display_nhwindow(g.tty_invent_win, FALSE);
+#endif
 }
 
 void

src/decl.c

@@ -435,6 +435,9 @@ const struct instance_globals g_init = {
     NULL, /* invbuf */
     0, /* inbufsize */
     WIN_ERR, /* cached_pickinv_win */
+#ifdef TTY_PERM_INVENT
+    WIN_ERR, /* tty_invent_win */
+#endif
     0, /* this_type */
     NULL, /* this_title */
     UNDEFINED_VALUES, /* only (coord) */

src/display.c

@@ -1507,9 +1507,11 @@ docrt(void)
     register int x, y;
     register struct rm *lev;
 
-    if (!u.ux)
+    if (!u.ux || g.program_state.in_docrt)
         return; /* display isn't ready yet */
 
+    g.program_state.in_docrt = TRUE;
+
     if (u.uswallow) {
         swallowed(1);
         goto post_map;
@@ -1552,6 +1554,7 @@ docrt(void)
     update_inventory();
 
     g.context.botlx = 1; /* force a redraw of the bottom line */
+    g.program_state.in_docrt = FALSE;
 }
 
 /* for panning beyond a clipped region; resend the current map data to

src/options.c

@@ -109,6 +109,9 @@ extern boolean colors_changed;  /* in tos.c */
 extern char *shade[3];          /* in sys/msdos/video.c */
 extern char ttycolors[CLR_MAX]; /* in sys/msdos/video.c */
 #endif
+#ifdef TTY_PERM_INVENT
+extern void tty_perm_invent_toggled(boolean negated);
+#endif
 
 static char empty_optstr[] = { '\0' };
 boolean duplicate, using_alias;
@@ -4467,6 +4470,10 @@ optfn_boolean(int optidx, int req, boolean negated, char *opts, char *op)
         case opt_use_inverse:
         case opt_hilite_pile:
         case opt_perm_invent:
+#ifdef TTY_PERM_INVENT
+            if (WINDOWPORT("tty"))
+                tty_perm_invent_toggled(negated);
+#endif
         case opt_ascii_map:
         case opt_tiled_map:
             g.opt_need_redraw = TRUE;