Tips and option to disable them

Adds a more general way to handle gameplay tips, and adds
a boolean option "tips", which can be used to disable all
tips.  Adds a helpful longer message when the game goes
into the "farlook" mode.

Also adds a lua binding to easily show multi-line text
in a menu window.

Breaks save compat.

include/context.h

@@ -11,6 +11,14 @@
 
 #define CONTEXTVERBSZ 30
 
+enum nh_tips {
+    TIP_ENHANCE = 0, /* #enhance */
+    TIP_SWIM,        /* walking into water */
+    TIP_GETPOS,      /* getpos/farlook */
+
+    NUM_TIPS
+};
+
 /*
  * The context structure houses things that the game tracks
  * or adjusts during the game, to preserve game state or context.
@@ -153,8 +161,7 @@ struct context_info {
     boolean botl;        /* partially redo status line */
     boolean botlx;       /* print an entirely new bottom line */
     boolean door_opened; /* set to true if door was opened during test_move */
-    boolean enhance_tip; /* player is informed about #enhance */
-    boolean swim_tip;    /* player was informed about walking into water */
+    boolean tips[NUM_TIPS];
     struct dig_info digging;
     struct victual_info victual;
     struct engrave_info engraving;

include/extern.h

@@ -966,6 +966,7 @@ extern int wiz_debug_cmd_traveldisplay(void);
 extern boolean u_rooted(void);
 extern boolean u_maybe_impaired(void);
 extern const char *u_locomotion(const char *);
+extern void handle_tip(int);
 extern void domove(void);
 extern void runmode_delay_output(void);
 extern void overexert_hp(void);

include/flag.h

@@ -34,6 +34,7 @@ struct flag {
     boolean friday13;        /* it's Friday the 13th */
     boolean goldX;           /* for BUCX filtering, whether gold is X or U */
     boolean help;            /* look in data file for info about stuff */
+    boolean tips;            /* show helpful hints? */
     boolean ignintr;         /* ignore interrupts */
     boolean implicit_uncursed; /* maybe omit "uncursed" status in inventory */
     boolean ins_chkpt;       /* checkpoint as appropriate; INSURANCE */

include/hack.h

@@ -519,6 +519,7 @@ enum nhcore_calls {
     NHCORE_RESTORE_OLD_GAME,
     NHCORE_MOVELOOP_TURN,
     NHCORE_GAME_EXIT,
+    NHCORE_GETPOS_TIP,
 
     NUM_NHCORE_CALLS
 };

include/optlist.h

@@ -615,6 +615,8 @@ static int optfn_##a(int, int, boolean, char *, char *);
     NHOPTB(timed_delay, Map, 0, opt_in, set_in_config,
                 Off, No, No, No, NoAlias, (boolean *) 0, Term_False)
 #endif
+    NHOPTB(tips, Advanced, 0, opt_out, set_in_game,
+                On, Yes, No, No, NoAlias, &flags.tips, Term_False)
     NHOPTB(tombstone, Advanced, 0, opt_out, set_in_game,
                 On, Yes, No, No, NoAlias, &flags.tombstone, Term_False)
     NHOPTB(toptenwin, Advanced, 0, opt_in, set_in_game,

include/patchlevel.h

@@ -17,7 +17,7 @@
  * Incrementing EDITLEVEL can be used to force invalidation of old bones
  * and save files.
  */
-#define EDITLEVEL 73
+#define EDITLEVEL 74
 
 /*
  * Development status possibilities.