Use the xenl terminfo flag to detect early-wrap terminals like the FreeBSD

console. Many thanks for a very informative email from Christian Weisgerber.

CHANGES

@@ -1,3 +1,8 @@
+23 April 2009
+
+* Use the xenl terminfo flag to detect early-wrap terminals like the FreeBSD
+  console. Many thanks for a very informative email from Christian Weisgerber.
+
 21 April 2009
 
 * tmux 0.8 released.
@@ -1208,7 +1213,7 @@
   (including mutt, emacs). No status bar yet and no key remapping or other
   customisation.
 
-$Id: CHANGES,v 1.273 2009-04-23 17:51:57 nicm Exp $
+$Id: CHANGES,v 1.274 2009-04-23 21:09:17 nicm Exp $
 
  LocalWords:  showw utf UTF fulvio ciriaco joshe OSC APC gettime abc DEF OA clr
  LocalWords:  rivo nurges lscm Erdely eol smysession mysession ek dstname RB ms

TODO

@@ -62,8 +62,6 @@
 - a confirm-before command which asks "Are you sure? (y/n)" before executing
   command, eg bind-key "&" confirm-before "kill-window"
 - clear window title on exit
-- better support for stupid margin terminals. strcmp for cons25 sucks, how can
-  these be autodetected?
 - refer to windows by name etc (duplicates? fnmatch?)
 - the output code (tty.c) could do with optimisation depending on term
   capibilities

tmux.h

@@ -1,4 +1,4 @@
-/* $Id: tmux.h,v 1.299 2009-04-03 17:21:46 nicm Exp $ */
+/* $Id: tmux.h,v 1.300 2009-04-23 21:09:17 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -317,8 +317,9 @@ enum tty_code_code {
 	TTYC_SMKX,	/* keypad_xmit, ks */
 	TTYC_SMSO,	/* enter_standout_mode, so */
 	TTYC_SMUL,	/* enter_underline_mode, us */
+	TTYC_XENL,	/* eat_newline_glitch, xn */
 };
-#define NTTYCODE (TTYC_SMUL + 1)
+#define NTTYCODE (TTYC_XENL + 1)
 
 /* Termcap types. */
 enum tty_code_type {

tty-term.c

@@ -1,4 +1,4 @@
-/* $Id: tty-term.c,v 1.17 2009-03-07 10:29:06 nicm Exp $ */
+/* $Id: tty-term.c,v 1.18 2009-04-23 21:09:17 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -107,6 +107,7 @@ struct tty_term_code_entry tty_term_codes[NTTYCODE] = {
 	{ TTYC_SMKX, TTYCODE_STRING, "smkx" },
 	{ TTYC_SMSO, TTYCODE_STRING, "smso" },
 	{ TTYC_SMUL, TTYCODE_STRING, "smul" },
+	{ TTYC_XENL, TTYCODE_FLAG, "xenl" },
 };
 
 char *
@@ -156,26 +157,6 @@ tty_term_quirks(struct tty_term *term)
 			term->codes[TTYC_ICH1].value.string = xstrdup("\033[@");
 		}
 	}
-
-#ifdef __FreeBSD__
-	if (strncmp(term->name, "cons", 4) == 0) {
-		/*
-		 * FreeBSD's console wraps lines at $COLUMNS - 1 rather than
-		 * $COLUMNS (the cursor can never be beyond $COLUMNS - 1) and
-		 * does not appear to support changing this behaviour, or any
-		 * of the obvious possibilities (turning off right margin
-		 * wrapping, insert mode).
-		 *
-		 * This is irritating, most notably because it is impossible to
-		 * write to the very bottom-right of the screen without
-		 * scrolling.
-		 *
-		 * Flag the terminal here and apply some workarounds in other
-		 * places to do the best possible.
-		 */
-		term->flags |= TERM_EARLYWRAP;
-	}
-#endif
 }
 
 struct tty_term *
@@ -323,6 +304,19 @@ tty_term_find(char *name, int fd, char **cause)
 	if (strstr(name, "88col") != NULL) /* XXX HACK */
 		term->flags |= TERM_88COLOURS;
 
+	/*
+	 * Terminals without xenl (eat newline glitch) wrap at at $COLUMNS - 1
+	 * rather than $COLUMNS (the cursor can never be beyond $COLUMNS - 1).
+	 *
+	 * This is irritating, most notably because it is impossible to write
+	 * to the very bottom-right of the screen without scrolling.
+	 *
+	 * Flag the terminal here and apply some workarounds in other places to
+	 * do the best possible.
+	 */
+	if (!tty_term_flag(term, TTYC_XENL))
+		term->flags |= TERM_EARLYWRAP;
+
 	return (term);
 
 error: