TTY: Add menu_overlay option

This was a request from a blind player.  It's hard to find
the left edge of the menu when it's drawn on the map, so
clear the screen and align menus to the left edge of the screen
when this option is turned off.

Originally this was called the window edge patch.

dat/opthelp

@@ -22,6 +22,7 @@ implicit_uncursed  omit "uncursed" from inventory, if possible    [TRUE]
 legacy         print introductory message                         [TRUE]
 lit_corridor   show a dark corridor as lit if in sight            [FALSE]
 lootabc        use a/b/c rather than o/i/b when looting           [FALSE]
+menu_overlay   overlay menus on the screen and align to right     [TRUE]
 mail           enable the mail daemon                             [TRUE]
 null           allow nulls to be sent to your terminal            [TRUE]
                try turning this option off (forcing NetHack to use its own

doc/Guidebook.mn

@@ -2218,6 +2218,10 @@ Default '>'.
 .lp menu_objsyms
 Show object symbols in menu headings in menus where
 the object symbols act as menu accelerators (default off).
+.lp menu_overlay
+Do not clear the screen before drawing menus, and align
+menus to the right edge of the screen. Only for the tty port.
+(default on)
 .lp menu_previous_page 
 Menu character accelerator to goto the previous menu page.
 Implemented by the Amiga, Gem and tty ports.

doc/Guidebook.tex

@@ -2664,6 +2664,10 @@ Default `\verb+>+'.
 \item[\ib{menu\verb+_+objsyms}]
 Show object symbols in menu headings in menus where
 the object symbols act as menu accelerators (default off).
+\item[\ib{menu\verb+_+overlay}]
+Do not clear the screen before drawing menus, and align
+menus to the right edge of the screen. Only for the tty port.
+(default on)
 \item[\ib{menu\verb+_+previous\verb+_+page}]
 Menu character accelerator to goto the previous menu page.
 Implemented by the Amiga, Gem and tty ports.

doc/fixes36.1

@@ -150,6 +150,7 @@ database entries for Cleaver, Sunsword, Frost and Fire brands, and
 
 Platform- and/or Interface-Specific New Features
 ------------------------------------------------
+tty: menu_overlay -option to clear screen and align menus to left
 
 
 NetHack Community Patches (or Variation) Included

include/flag.h

@@ -199,6 +199,7 @@ struct instance_flags {
     boolean mention_walls;    /* give feedback when bumping walls */
     boolean menu_tab_sep;     /* Use tabs to separate option menu fields */
     boolean menu_head_objsym; /* Show obj symbol in menu headings */
+    boolean menu_overlay;     /* Draw menus over the map */
     boolean menu_requested;   /* Flag for overloaded use of 'm' prefix
                                * on some non-move commands */
     boolean renameallowed;    /* can change hero name during role selection */

src/options.c

@@ -149,6 +149,11 @@ static struct Bool_Opt {
     /* for menu debugging only*/
     { "menu_tab_sep", &iflags.menu_tab_sep, FALSE, SET_IN_WIZGAME },
     { "menu_objsyms", &iflags.menu_head_objsym, FALSE, SET_IN_GAME },
+#ifdef TTY_GRAPHICS
+    { "menu_overlay", &iflags.menu_overlay, TRUE, SET_IN_GAME },
+#else
+    { "menu_overlay", (boolean *) 0, FALSE, SET_IN_FILE },
+#endif
     { "mouse_support", &iflags.wc_mouse_support, TRUE, DISP_IN_GAME }, /*WC*/
 #ifdef NEWS
     { "news", &iflags.news, TRUE, DISP_IN_GAME },

win/tty/wintty.c

@@ -2108,13 +2108,15 @@ boolean blocking; /* with ttys, all windows are blocking */
         if (ttyDisplay->toplin == 1)
             tty_display_nhwindow(WIN_MESSAGE, TRUE);
 #ifdef H2344_BROKEN
-        if (cw->maxrow >= (int) ttyDisplay->rows)
+        if (cw->maxrow >= (int) ttyDisplay->rows
+            || !iflags.menu_overlay)
 #else
-        if (cw->offx == 10 || cw->maxrow >= (int) ttyDisplay->rows)
+        if (cw->offx == 10 || cw->maxrow >= (int) ttyDisplay->rows
+            || !iflags.menu_overlay)
 #endif
         {
             cw->offx = 0;
-            if (cw->offy) {
+            if (cw->offy || iflags.menu_overlay) {
                 tty_curs(window, 1, 0);
                 cl_eos();
             } else