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.

include/config.h

@@ -560,6 +560,10 @@ typedef unsigned char uchar;
 /* #define TTY_TILES_ESCCODES */
 /* #define TTY_SOUND_ESCCODES */
 
+/* An experimental minimalist inventory list capability under tty if you have
+ * at least 28 additional rows beneath the status window on your terminal  */
+/* #define TTY_PERM_INVENT */
+
 /* NetHack will execute an external program whenever a new message-window
  * message is shown.  The program to execute is given in environment variable
  * NETHACK_MSGHANDLER.  It will get the message as the only parameter.

include/decl.h

@@ -98,6 +98,7 @@ struct sinfo {
     int restoring;
     int in_moveloop;
     int in_impossible;
+    int in_docrt;               /* in docrt() */
     int in_self_recover;
     int in_parseoptions;        /* in parseoptions */
     int config_error_ready;     /* config_error_add is ready, available */
@@ -971,6 +972,9 @@ struct instance_globals {
        persistent one doesn't get shrunk during filtering for item selection
        then regrown to full inventory, possibly being resized in the process */
     winid cached_pickinv_win;
+#ifdef TTY_PERM_INVENT
+    winid tty_invent_win;
+#endif
     /* query objlist callback: return TRUE if obj type matches "this_type" */
     int this_type;
     const char *this_title; /* title for inventory list of specific type */

include/wintty.h

@@ -10,6 +10,23 @@
 #ifndef WINDOW_STRUCTS
 #define WINDOW_STRUCTS
 
+#ifdef TTY_PERM_INVENT
+enum { tty_pi_minrow = 28, tty_pi_mincol = 79 };
+union ttycellcontent {
+    char ttychar;
+    glyph_info *gi;
+};
+struct tty_perminvent_cell {
+    Bitfield(refresh, 1);
+    Bitfield(text, 1);
+    Bitfield(glyph, 1);
+    Bitfield(colorbits, 5);
+    union ttycellcontent content;
+    int32_t color;
+};
+extern struct tty_perminvent_cell zerottycell;
+#endif
+
 /* menu structure */
 typedef struct tty_mi {
     struct tty_mi *next;
@@ -45,6 +62,9 @@ struct WinDesc {
     long nitems;           /* total number of items (MENU) */
     short how;             /* menu mode - pick 1 or N (MENU) */
     char menu_ch;          /* menu char (MENU) */
+#ifdef TTY_PERM_INVENT
+    struct tty_perminvent_cell **cells;
+#endif
 };
 
 /* window flags */
@@ -103,7 +123,11 @@ struct tty_status_fields {
 #ifdef NHW_BASE
 #undef NHW_BASE
 #endif
-#define NHW_BASE 6
+#define NHW_BASE (NHW_TEXT + 1)
+
+#ifdef TTY_PERM_INVENT
+#define NHW_TTYINVENT (NHW_BASE + 1)
+#endif
 
 extern struct window_procs tty_procs;
 
@@ -261,6 +285,10 @@ E void genl_outrip(winid, int, time_t);
 E char *tty_getmsghistory(boolean);
 E void tty_putmsghistory(const char *, boolean);
 
+#ifdef TTY_PERM_INVENT
+E void tty_refresh_inventory(int start, int stop, int y);
+#endif
+
 #ifdef NO_TERMS
 #ifdef MAC
 #ifdef putchar