tty and curses: support italic as text attribute

doc/fixes3-7-0.txt

@@ -1878,6 +1878,7 @@ X11: implement 'selectsaved', restore via menu of saved games
 X11: echo getline prompt and response (wishes, applying names) to message
 	window and dumplog message history
 X11: fix map expose area, no longer leaving black bars on the map
+tty and curses: support italic as text attribute
 
 
 NetHack Community Patches (or Variation) Included

include/wintype.h

@@ -124,6 +124,7 @@ typedef struct gi {
 #define ATR_NONE       0
 #define ATR_BOLD       1
 #define ATR_DIM        2
+#define ATR_ITALIC     3
 #define ATR_ULINE      4
 #define ATR_BLINK      5
 #define ATR_INVERSE    7

src/options.c

@@ -6814,6 +6814,7 @@ static const struct attr_names {
     { "none", ATR_NONE },
     { "bold", ATR_BOLD },
     { "dim", ATR_DIM },
+    { "italic", ATR_ITALIC },
     { "underline", ATR_ULINE },
     { "blink", ATR_BLINK },
     { "inverse", ATR_INVERSE },

win/curses/cursmisc.c

@@ -748,6 +748,9 @@ curses_convert_attr(int attr)
     case ATR_INVERSE:
         curses_attr = A_REVERSE;
         break;
+    case ATR_ITALIC:
+        curses_attr = A_ITALIC;
+        break;
     default:
         curses_attr = A_NORMAL;
     }

win/tty/termcap.c

@@ -36,6 +36,7 @@ struct tc_lcl_data tc_lcl_data = { 0, 0, 0, 0, 0, 0, 0, FALSE };
 static char *HO, *CL, *CE, *UP, *XD, *BC, *SO, *SE, *TI, *TE;
 static char *VS, *VE;
 static char *ME, *MR, *MB, *MH, *MD;
+static char *ZH, *ZR;
 
 #ifdef TERMLIB
 boolean dynamic_HIHE = FALSE;
@@ -256,6 +257,8 @@ tty_startup(int *wid, int *hgt)
     SE = Tgetstr("se"); /* standout end */
     nh_US = Tgetstr("us"); /* underline start */
     nh_UE = Tgetstr("ue"); /* underline end */
+    ZH = Tgetstr("ZH"); /* italic start */
+    ZR = Tgetstr("ZR"); /* italic end */
     SG = tgetnum("sg"); /* -1: not fnd; else # of spaces left by so */
     if (!SO || !SE || (SG > 0))
         SO = SE = nh_US = nh_UE = nullstr;
@@ -1320,6 +1323,10 @@ s_atr2str(int n)
         if (MH && *MH)
             return MH;
         break;
+    case ATR_ITALIC:
+        if (ZH && *ZH)
+            return ZH;
+        break;
     }
     return nulstr;
 }
@@ -1342,6 +1349,10 @@ e_atr2str(int n)
         if (ME && *ME)
             return ME;
         break;
+    case ATR_ITALIC:
+        if (ZR && *ZR)
+            return ZR;
+        break;
     }
     return nulstr;
 }
@@ -1440,7 +1451,7 @@ term_start_color(int color)
 #define tcfmtstr256 "\033[38:5:%ldm"
 #endif
 #endif
- 
+
 static void emit24bit(long mcolor);
 static void emit256(int u256coloridx);
 
@@ -1469,7 +1480,7 @@ term_start_24bitcolor(struct unicode_representation *urep)
 {
     if (urep && SYMHANDLING(H_UTF8)) {
         /* color 0 has bit 0x1000000 set */
-        long mcolor = (urep->ucolor & 0xFFFFFF); 
+        long mcolor = (urep->ucolor & 0xFFFFFF);
         if (iflags.colorcount == 256)
             emit256(urep->u256coloridx);
         else