[patch] Detection of color terminal

["Martin Bialasinski" <martin internet-treff uni-koeln de>]

Hi,

Oskar Liljeblad <oskar osk mine nu>, the author of the current zip
extfs, has sent me the following patch to do better check for color
support than currently done.

Currently, mc checks $TERM for xterm* or for teh existance of
$COLORTERM.

Oskar says:

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The patch below fixes the problem. The behaviour was
copied from ncurses has_color: Require that max_colors (Co)
terminfo attribute is set. Require that max_pairs (pa)
is set. Require one of:

  1. set_foreground (Sf) set, set_background (Sb) set.
  2. set_a_foreground (AF) set, set_a_background (AB) set.
  3. set_color_pair (sp) set.

Note that these checks are only made if the traditional
color checking fails.

diff -ru mc-4.5.55/src/slint.c mc-4.5.55-oskar/src/slint.c
--- mc-4.5.55/src/slint.c	Sat Nov 24 12:46:42 2001
+++ mc-4.5.55-oskar/src/slint.c	Sat Nov 24 12:54:25 2001
@@ -466,6 +466,13 @@
 	for (i = 0; color_terminals [i]; i++)
 	    if (strcmp (color_terminals [i], terminal) == 0)
 		SLtt_Use_Ansi_Colors = 1;
+       if (!SLtt_Use_Ansi_Colors
+	        && SLtt_tgetnum("Co") >= 0
+               && SLtt_tgetnum("pa") >= 0
+               && (((SLtt_tgetstr("Sf") != NULL && SLtt_tgetstr("Sb") != NULL))
+               || ((SLtt_tgetstr("AF") != NULL && SLtt_tgetstr("AB") != NULL))
+               || (SLtt_tgetstr("sp") != NULL)))
+           SLtt_Use_Ansi_Colors = 1;
       }
       else
       /* check color_terminal_string */

----------

Ciao,
        Martin