TTY: Add compile-time option for tile data hinting

Several people have asked if 3.6.0 supports playing with tiles on
a public server. Because there's no way for the user's end to know
what that white @ is, this adds special console escape codes for
tile hinting.

The idea was originally a patch called TelnetTiles by Justin Hiltscher,
but this expanded version comes via NAO, where it's been in use for years.

This is basically an interim hack, which should go away when/if
we support actual client-server model.

win/tty/wintty.c

@@ -37,6 +37,15 @@ extern void msmsg(const char *, ...);
 #endif
 #endif
 
+#ifdef TTY_TILES_ESCCODES
+extern short glyph2tile[];
+#define TILE_ANSI_COMMAND 'z'
+#define AVTC_GLYPH_START   0
+#define AVTC_GLYPH_END     1
+#define AVTC_SELECT_WINDOW 2
+#define AVTC_INLINE_SYNC   3
+#endif
+
 extern char mapped_menu_cmds[]; /* from options.c */
 
 /* this is only needed until tty_status_* routines are written */
@@ -175,6 +184,36 @@ static const char default_menu_cmds[] = {
     MENU_INVERT_PAGE,   MENU_SEARCH,      0 /* null terminator */
 };
 
+#ifdef TTY_TILES_ESCCODES
+static int vt_tile_current_window = -2;
+
+void
+print_vt_code(i, c, d)
+int i, c, d;
+{
+    if (iflags.vt_tiledata) {
+        if (c >= 0) {
+            if (i == AVTC_SELECT_WINDOW) {
+                if (c == vt_tile_current_window) return;
+                vt_tile_current_window = c;
+            }
+            if (d >= 0)
+                printf("\033[1;%d;%d;%d%c", i, c, d, TILE_ANSI_COMMAND);
+            else
+                printf("\033[1;%d;%d%c", i, c, TILE_ANSI_COMMAND);
+        } else {
+            printf("\033[1;%d%c", i, TILE_ANSI_COMMAND);
+        }
+    }
+}
+#else
+# define print_vt_code(i, c, d) ;
+#endif /* !TTY_TILES_ESCCODES */
+#define print_vt_code1(i)     print_vt_code((i), -1, -1)
+#define print_vt_code2(i,c)   print_vt_code((i), (c), -1)
+#define print_vt_code3(i,c,d) print_vt_code((i), (c), (d))
+
+
 /* clean up and quit */
 STATIC_OVL void
 bail(mesg)
@@ -1427,6 +1466,8 @@ winid window;
         panic(winpanicstr, window);
     ttyDisplay->lastwin = window;
 
+    print_vt_code2(AVTC_SELECT_WINDOW, window);
+
     switch (cw->type) {
     case NHW_MESSAGE:
         if (ttyDisplay->toplin) {
@@ -2060,6 +2101,8 @@ boolean blocking; /* with ttys, all windows are blocking */
     ttyDisplay->lastwin = window;
     ttyDisplay->rawprint = 0;
 
+    print_vt_code2(AVTC_SELECT_WINDOW, window);
+
     switch (cw->type) {
     case NHW_MESSAGE:
         if (ttyDisplay->toplin == 1) {
@@ -2145,6 +2188,8 @@ winid window;
     if (window == WIN_ERR || (cw = wins[window]) == (struct WinDesc *) 0)
         panic(winpanicstr, window);
 
+    print_vt_code2(AVTC_SELECT_WINDOW, window);
+
     switch (cw->type) {
     case NHW_MESSAGE:
         if (ttyDisplay->toplin)
@@ -2214,6 +2259,8 @@ register int x, y; /* not xchar: perhaps xchar is unsigned and
         panic(winpanicstr, window);
     ttyDisplay->lastwin = window;
 
+    print_vt_code2(AVTC_SELECT_WINDOW, window);
+
 #if defined(USE_TILES) && defined(MSDOS)
     adjust_cursor_flags(cw);
 #endif
@@ -2302,6 +2349,8 @@ char ch;
     if (window == WIN_ERR || (cw = wins[window]) == (struct WinDesc *) 0)
         panic(winpanicstr, window);
 
+    print_vt_code2(AVTC_SELECT_WINDOW, window);
+
     switch (cw->type) {
     case NHW_STATUS:
     case NHW_MAP:
@@ -2369,6 +2418,8 @@ const char *str;
 
     ttyDisplay->lastwin = window;
 
+    print_vt_code2(AVTC_SELECT_WINDOW, window);
+
     switch (cw->type) {
     case NHW_MESSAGE:
         /* really do this later */
@@ -3065,9 +3116,13 @@ int bkglyph UNUSED;
     /* map glyph to character and color */
     (void) mapglyph(glyph, &ch, &color, &special, x, y);
 
+    print_vt_code2(AVTC_SELECT_WINDOW, window);
+
     /* Move the cursor. */
     tty_curs(window, x, y);
 
+    print_vt_code3(AVTC_GLYPH_START, glyph2tile[glyph], special);
+
 #ifndef NO_TERMS
     if (ul_hack && ch == '_') { /* non-destructive underscore */
         (void) putchar((char) ' ');
@@ -3111,6 +3166,8 @@ int bkglyph UNUSED;
 #endif
     }
 
+    print_vt_code1(AVTC_GLYPH_END);
+
     wins[window]->curx++; /* one character over */
     ttyDisplay->curx++;   /* the real cursor moved too */
 }
@@ -3121,6 +3178,7 @@ const char *str;
 {
     if (ttyDisplay)
         ttyDisplay->rawprint++;
+    print_vt_code2(AVTC_SELECT_WINDOW, NHW_BASE);
 #if defined(MICRO) || defined(WIN32CON)
     msmsg("%s\n", str);
 #else
@@ -3135,6 +3193,7 @@ const char *str;
 {
     if (ttyDisplay)
         ttyDisplay->rawprint++;
+    print_vt_code2(AVTC_SELECT_WINDOW, NHW_BASE);
     term_start_raw_bold();
 #if defined(MICRO) || defined(WIN32CON)
     msmsg("%s", str);
@@ -3153,7 +3212,7 @@ const char *str;
 int
 tty_nhgetch()
 {
-    int i;
+    int i, tmp;
 #ifdef UNIX
     /* kludge alert: Some Unix variants return funny values if getc()
      * is called, interrupted, and then called again.  There
@@ -3164,6 +3223,7 @@ tty_nhgetch()
     char nestbuf;
 #endif
 
+    print_vt_code1(AVTC_INLINE_SYNC);
     (void) fflush(stdout);
     /* Note: if raw_print() and wait_synch() get called to report terminal
      * initialization problems, then wins[] and ttyDisplay might not be
@@ -3186,6 +3246,12 @@ tty_nhgetch()
         i = '\033'; /* same for EOF */
     if (ttyDisplay && ttyDisplay->toplin == 1)
         ttyDisplay->toplin = 2;
+#ifdef TTY_TILES_ESCCODES
+    /* hack to force output of the window select code */
+    tmp = vt_tile_current_window;
+    vt_tile_current_window++;
+    print_vt_code2(AVTC_SELECT_WINDOW, tmp);
+#endif /* TTY_TILES_ESCCODES */
     return i;
 }