Re: Fwd: status of slrn

On Thu, Oct 25, 2007 at 09:01:53PM EDT, John E. Davis wrote:
> cga2000 <[email protected]> wrote:

[..]

> Does the following slsh script work for you?  It shows 256 foreground
> colors for each of 256 background colors.
> Thanks, --John

Did I mention I run everything under gnu/screen?

:-(

The slsmg script displays 256 colors alright .. when I run it directly
on top of an xterm.

But when I run it in a gnu/screen-managed terminal it only displays 8
colors (black, red, green, yellow, blue, magenta, cyan, white).

I haven't tested with slrn but my guess is that I can expect a similar
behavior.

Just in case this is the output of slrn --version:


_____________________________________________________________________
Slrn 0.9.8.1pl1 [2005-02-17]
        * Note: This version is a developer preview.
S-Lang Library Version: 2.0.6
Compiled at: Mar 21 2007 06:37:54
Operating System: Debian

 COMPILE TIME OPTIONS:
  Backends: +nntp +slrnpull +spool
  External programs / libs: +canlock +inews +ssl +uudeview
  Features: +charset_mapping +decoding +emphasized_text +end_of_thread
    +fake_refs +gen_msgid -grouplens +mime -msgid_cache +piping +rnlock
    +slang +spoilers -strict_from
 DEFAULTS:
  Default server object:     nntp
  Default posting mechanism: nntp
  Default character set:     isolatin
 SUPPORTED CHARACTER SETS:
  isolatin ibm850 ibm852 ibm857 ibm737 NeXT koi8
_____________________________________________________________________


I assume that slang uses terminfo to determine the underlying terminal's
capabilities, here's the entry I use under gnu/screen:


_____________________________________________________________________
[07:26:39][gavron@turki:~/bin]$ infocmp $TERM
#       Reconstructed via infocmp from file: /usr/share/terminfo/s/screen-256color-bce
screen-256color-bce|GNU Screen with 256 colors and BCE,
        am, bce, km, mir, msgr, xenl,
        colors#256, cols#80, it#8, lines#24, pairs#32767,
        acsc=++\,\,--..00II``aaffgghhjjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~,
        bel=^G, blink=\E[5m, bold=\E[1m, cbt=\E[Z, civis=\E[?25l,
        clear=\E[H\E[J, cnorm=\E[34h\E[?25h, cr=^M,
        csr=\E[%i%p1%d;%p2%dr, cub=\E[%p1%dD, cub1=^H,
        cud=\E[%p1%dB, cud1=^J, cuf=\E[%p1%dC, cuf1=\E[C,
        cup=\E[%i%p1%d;%p2%dH, cuu=\E[%p1%dA, cuu1=\EM,
        cvvis=\E[34l, dch=\E[%p1%dP, dch1=\E[P, dl=\E[%p1%dM,
        dl1=\E[M, ed=\E[J, el=\E[K, el1=\E[1K, enacs=\E(B\E)0,
        flash=\Eg, home=\E[H, ht=^I, hts=\EH, ich=\E[%p1%d@,
        il=\E[%p1%dL, il1=\E[L, ind=^J, initc@, is2=\E)0, kbs=\177,
        kcub1=\EOD, kcud1=\EOB, kcuf1=\EOC, kcuu1=\EOA,
        kdch1=\E[3~, kend=\E[4~, kf1=\EOP, kf10=\E[21~,
        kf11=\E[23~, kf12=\E[24~, kf2=\EOQ, kf3=\EOR, kf4=\EOS,
        kf5=\E[15~, kf6=\E[17~, kf7=\E[18~, kf8=\E[19~, kf9=\E[20~,
        khome=\E[1~, kich1=\E[2~, knp=\E[6~, kpp=\E[5~, nel=\EE,
        op=\E[39;49m, rc=\E8, rev=\E[7m, ri=\EM, rmacs=^O,
        rmcup=\E[?1049l, rmir=\E[4l, rmkx=\E[?1l\E>, rmso=\E[23m,
        rmul=\E[24m, rs2=\Ec, sc=\E7,
        setab=\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%p1%d%;m,
        setaf=\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p1%d%;m,
        sgr0=\E[m\017, smacs=^N, smcup=\E[?1049h, smir=\E[4h,
        smkx=\E[?1h\E=, smso=\E[3m, smul=\E[4m, tbc=\E[3g,
_____________________________________________________________________


And here's a perl script that displays 256 colors with or without the
intervening gnu/screen layer:

_____________________________________________________________________
#!/usr/bin/perl
# $XFree86: xc/programs/xterm/vttests/256colors.pl,v 1.1 1999/07/11 08:49:54 dawes Exp $

for ($bg = 0; $bg < 256; $bg++) {
    print "\x1b[9;1H\x1b[2J";
    for ($fg = 0; $fg < 256; $fg++) {
	print "\x1b[48;5;${bg}m\x1b[38;5;${fg}m";
	printf "%03.3d/%03.3d ", $fg, $bg;
    }
    sleep 1;
    print "\n";
}
_____________________________________________________________________


Since both the slsmg script and slrn appear to behave similarly ..
rounding the 256 colors to the closest that's available in an 8-color
palette, would this indicate that I am running into a limitation of
slang when under gnu/screen?

Is this something that could be corrected by modifying the terminfo
entry?

Thanks,
cga



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