Re: Colors on TTY (v26)

[Aleksey Midenkov <midenok@gmail.com>]

On Sun, Mar 31, 2019 at 8:41 PM Eli Zaretskii <eliz@gnu.org> wrote:

> > From: Aleksey Midenkov <midenok@gmail.com>
> > Date: Sun, 31 Mar 2019 20:20:56 +0300
> > Cc: help-gnu-emacs@gnu.org
> >
> >  Emacs doesn't hard-code terminal names, but it has Lisp libraries
> >  under lisp/term/ which are loaded by the terminal name.  If you have a
> >  terminal that behaves like one of the ones known to Emacs, you need
> >  only copy the relevant Lisp library under lisp/term/ to the name of
> >  your terminal (with the .el extension), and things should work from
> >  there.
> >
> > I tried different terminal names. It seems, that it understands "xterm-"
> prefix. The remaining part can be
> > arbitrary: I literally tried "xterm-something" and it worked. I guess,
> there is no such file "xterm-something" in the
> > library. In any case, it's much better to rename terminal to "xterm-*",
> than deal with distributed files.
>
> Just do "ls lisp/term/*.el" and see what you've got there.
>

And?


>
> >  The full color list is indeed set during startup, so if you invoke
> >  list-colors-display too early during startup, you will not see that.
> >  This is not a bug, as Emacs can not know the color capabilities of the
> >  terminal until it probes them.
> >
> > This is indeed a bug: different result returned by same routine. Either
> list-colors-display should not exist at an
> > early stage or color capability probe should be done earlier.
>
> What do you mean "should not exists"?  The code is there, it uses
> whatever knowledge it has when you call it.  Where you did call it, it
> didn't yet query the terminal to see how many colors it supports, and
> didn't set up their names.  IOW, you are shooting yourself in the foot
> by calling the function too early.  There are various hooks provided
> by startup.el which allow you to call this function when colors are
> set up; do that, and Bob's your uncle.
>
>
You may call it anything you like, but this misleading behavior causes
trouble.


-- 
All the best,

Aleksey Midenkov
@midenok