curses line-of-input prompting

Redo the fake ESC handling for curses' wgetnstr() so that it
applies to all popup prompts rather than just to "Who are you?",
in case the player sets the 'popup_dialog' option.

doc/fixes37.0

@@ -1,4 +1,4 @@
-NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.420 $ $NHDT-Date: 1609811543 2021/01/05 01:52:23 $
+NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.423 $ $NHDT-Date: 1609977590 2021/01/06 23:59:50 $
 
 General Fixes and Modified Features
 -----------------------------------
@@ -482,10 +482,10 @@ remove unused vision tables
 curses: 'msg_window' option wasn't functional for curses unless the binary
 	also included tty support
 curses: line input that doesn't take place on the bottom line of the message
-	window or in a popup doesn't support ESC to kill partial input or to
-	cancel; "Who are you?" prompt was willing to name a character "^[";
-	have askname() fake the usual ESC handling, but player has to type
-	<escape><return> for that to work
+	window uses a canned curses routine and doesn't support ESC to kill
+	partial input or to cancel; "Who are you?" prompt was willing to name
+	a character "^["; have the popup version of getlin() fake the usual
+	ESC handling, but player has to type <escape><return> for that to work
 Qt: at Xp levels above 20 with 'showexp' On, the combined status field
 	"Level:NN/nnnnnnnn" was too big and truncated by a char at each end
 Qt: searching a text window for something that wasn't found and then searching

win/curses/cursdial.c

@@ -131,7 +131,8 @@ curses_line_input_dialog(const char *prompt, char *answer, int buffer)
     int map_height, map_width, maxwidth, remaining_buf, winx, winy, count;
     WINDOW *askwin, *bwin;
     char *tmpstr;
-    int prompt_width, prompt_height = 1, height = prompt_height;
+    int prompt_width, prompt_height = 1, height = prompt_height,
+        answerx = 0, answery = 0, trylim;
     char input[BUFSZ];
 
     /* if messages were being suppressed for the remainder of the turn,
@@ -185,11 +186,28 @@ curses_line_input_dialog(const char *prompt, char *answer, int buffer)
                 wmove(askwin, count + 1, 0);
         }
         free(tmpstr);
+        /* remember where user's typed response will start, in case we
+           need to re-prompt */
+        getyx(askwin, answery, answerx);
     }
 
     echo();
     curs_set(1);
-    wgetnstr(askwin, input, buffer - 1);
+    trylim = 10;
+    do {
+        /* move and clear are only needed for 2nd and subsequent passes */
+        wmove(askwin, answery, answerx);
+        wclrtoeol(askwin);
+
+        wgetnstr(askwin, input, buffer - 1);
+        /* ESC after some input kills that input and tries again;
+           ESC at the start cancels, leaving ESC in the result buffer.
+           [Note: wgetnstr() treats <escape> as an ordinary character
+           so user has to type <escape><return> for it to behave the
+           way we want it to.] */
+        if (input[0] != '\033' && index(input, '\033') != 0)
+             input[0] = '\0';
+    } while (--trylim > 0 && !input[0]);
     curs_set(0);
     Strcpy(answer, input);
     werase(bwin);

win/curses/cursmain.c

@@ -240,9 +240,6 @@ curses_player_selection()
 void
 curses_askname()
 {
-    const char *bail_msg = "Until next time then...";
-    int trylimit = 10;
-
 #ifdef SELECTSAVED
     if (iflags.wc2_selectsaved && !iflags.renameinprogress)
         switch (restore_menu(MAP_WIN)) {
@@ -255,29 +252,16 @@ curses_askname()
         }
 #endif /* SELECTSAVED */
 
-    do {
-        if (--trylimit < 0) {
-             bail_msg = "A name is required; giving up.";
-             goto bail;
-        }
-
-        g.plname[0] = '\0';
-        /* for askname(), this will use wgetnstr() which treats ESC like
-           an ordinary character; fake the behavior we want:  as kill_char
-           if it follows any input or as cancel if it is at the start;
-           player has to type <escape><return> to get back here though */
-        curses_line_input_dialog("Who are you?", g.plname, PL_NSIZ);
-
-        if (g.plname[0] == '\033')
-            goto bail;
-        (void) mungspaces(g.plname);
-    } while (!g.plname[0] || index(g.plname, '\033') != 0);
-
-    /* we get here if input is non-empty and doesn't contain ESC */
-    return;
+    curses_line_input_dialog("Who are you?", g.plname, PL_NSIZ);
+    (void) mungspaces(g.plname);
+    if (g.plname[0] && g.plname[0] != '\033') {
+         iflags.renameallowed = TRUE; /* tty uses this, we don't [yet?] */
+         return;
+    }
 
  bail:
-    curses_bail(bail_msg);
+    /* message is delivered via raw_print() */
+    curses_bail("\nUntil next time then...\n");
     /*NOTREACHED*/
 }