Add an option to give feedback when bumping walls

Boolean option "mention_walls", defaults to off.
Useful for blind players.

doc/Guidebook.mn

@@ -2053,6 +2053,8 @@ Enable mail delivery during the game (default on).
 .lp "male    "
 An obsolete synonym for ``gender:male''.
 Cannot be set with the `O' command.
+.lp mention_walls
+Give feedback when walking against a wall (default off).
 .lp menustyle
 Controls the interface used when you need to choose various objects (in
 response to the Drop command, for instance).  The value specified should

doc/fixes35.0

@@ -879,7 +879,7 @@ abuse wisdom in keeping with Rider eating message
 message inconsistency: death message "swallowed <mon> whole" was preceded 
 	by "You bite into"
 improve the messaging when a monster you can't see is causing an obstruction
-
+add option mention_walls, which gives feedback when bumping against a wall
 
 Platform- and/or Interface-Specific Fixes
 -----------------------------------------

include/flag.h

@@ -189,6 +189,7 @@ struct instance_flags {
 	boolean  deferred_X;	/* deferred entry into explore mode */
 	boolean  num_pad;	/* use numbers for movement commands */
 	boolean  news;		/* print news */
+	boolean  mention_walls;	/* give feedback when bumping walls */
 	boolean  menu_tab_sep;	/* Use tabs to separate option menu fields */
 	boolean  menu_requested; /* Flag for overloaded use of 'm' prefix
 				  * on some non-move commands */

src/hack.c

@@ -630,8 +630,11 @@ int mode;
 	if (Passes_walls && may_passwall(x,y)) {
 	    ;	/* do nothing */
 	} else if (tmpr->typ == IRONBARS) {
-	    if (!(Passes_walls || passes_bars(youmonst.data)))
+	    if (!(Passes_walls || passes_bars(youmonst.data))) {
+		if (iflags.mention_walls)
+		    You("cannot pass through the bars.");
 		return FALSE;
+	    }
 	} else if (tunnels(youmonst.data) && !needspick(youmonst.data)) {
 	    /* Eat the rock. */
 	    if (mode == DO_MOVE && still_chewing(x,y)) return FALSE;
@@ -646,8 +649,10 @@ int mode;
 		if (Is_stronghold(&u.uz) && is_db_wall(x,y))
 		    pline_The("drawbridge is up!");
 		/* sokoban restriction stays even after puzzle is solved */
-		if (Passes_walls && !may_passwall(x,y) && In_sokoban(&u.uz))
+		else if (Passes_walls && !may_passwall(x,y) && In_sokoban(&u.uz))
 		    pline_The("Sokoban walls resist your ability.");
+		else if (iflags.mention_walls)
+		    pline("It's a wall.");
 	    }
 	    return FALSE;
 	}

src/options.c

@@ -139,6 +139,7 @@ static struct Bool_Opt
 #else
 	{"mail", (boolean *)0, TRUE, SET_IN_FILE},
 #endif
+	{"mention_walls", &iflags.mention_walls, FALSE, SET_IN_GAME},
 	/* for menu debugging only*/
 	{"menu_tab_sep", &iflags.menu_tab_sep, FALSE, SET_IN_GAME},
 	{"mouse_support", &iflags.wc_mouse_support, TRUE, DISP_IN_GAME},	/*WC*/