Re: tty[1-6]: colors a negative accessibility/usability trend

[Karel Zak <kzak@redhat.com>]

On Mon, Mar 02, 2015 at 10:31:46AM +0100, Samuel Thibault wrote:
> Karel Zak, le Mon 02 Mar 2015 09:59:29 +0100, a écrit :
> > On Sun, Mar 01, 2015 at 01:32:01PM +0000, Pádraig Brady wrote:
> > > and I've not heard specific complaints about it.
> > > What terminals are not catered for here?
> > 
> > I don't know, my plan is to do some research to better understand what
> > Samuel is talking about.
> 
> Mmm, I thought it was well-known, but apparently not :/
> 
> I mean using this (see terminfo(5) for the details):
> 
> #include <term.h>
> #include <stdio.h>
> #include <unistd.h>
> 
> int main(void) {
>   int my_bg_color = 0;
>   int my_fg_color = 4;
> 
>   setupterm(NULL, STDOUT_FILENO, NULL);
>   tputs(enter_bold_mode, 1, putchar);
>   tputs(enter_italics_mode, 1, putchar);
>   tputs(enter_underline_mode, 1, putchar);
>   tputs(enter_blink_mode, 1, putchar);
>   tputs(enter_reverse_mode, 1, putchar);
>   tputs(tparm(set_a_foreground, my_fg_color), 1, putchar);
>   tputs(tparm(set_a_background, my_bg_color), 1, putchar);
>   printf("Hello, world!\n");
>   tputs(exit_attribute_mode, 1, putchar);
>   return 0;
> }
> 
> On terminals which support it, you can even get rgb colors by using
> initialize_color or initialize_pair. If you want a more complete
> example, see lstopo-text.c inside the hwloc package, we include ncurses,
> but we don't actually need it for this kind of code. 

This is misunderstanding, I know about tputs :)

The question is how often the harcoded sequences are problem, which
terminals? how often people use it? Would be enough to detect these
terminals and use things without colors there?

    Karel

-- 
 Karel Zak  <kzak@redhat.com>
 http://karelzak.blogspot.com