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bug#30429: 27.0.50; Emacs TERMINFO "xterm-direct" "efaq" example not wor
From: |
Eli Zaretskii |
Subject: |
bug#30429: 27.0.50; Emacs TERMINFO "xterm-direct" "efaq" example not working |
Date: |
Mon, 12 Feb 2018 17:51:09 +0200 |
> From: Live System User <nyc4bos@aol.com>
> Date: Sun, 11 Feb 2018 21:09:40 -0500
>
> The example in the "efaq" Info file gives the following
>
> TERM=xterm-direct emacs -nw
>
> When I execute this, as stated, I get an Emacs session
> WITHOUT any colors -- even "M-x list-colors-display"
> does not show any colors.
>
> However, if I change this to the following, I see colors
> displayed:
>
> TERM=xterm-direct2 emacs -nw
>
> [Note the "2" in "xterm-drect2"]
>
> Here is the definition for the setab/setaf parameters for
> each:
>
>
>
> xterm-direct2:
>
> # Emacs 26.1 and later support direct color mode in terminals, using a
> # combination of user-defined capabilities and ncurses-dependent function
> # calls. We will not include that here.
> #
> # Here is a first revision, which (disregarding the reuse of colors 1-7 which
> # is of interest only to the numerically illiterate), is compatible with other
> # terminal descriptions written for curses. It relies upon the extended range
> # for numeric capabilities provided in ncurses 6.1:
> xterm+direct2|xterm with direct-color indexing,
> [...]
>
> xterm-direct2|xterm with direct-color indexing (old),
> use=xterm+direct2, use=xterm+titlestack, use=xterm,
> [...]
>
> setab=\E[%?%p1%{8}%<%t4%p1%d%e48\:2\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
>
> setaf=\E[%?%p1%{8}%<%t3%p1%d%e38\:2\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
>
>
>
>
>
> xterm-direct:
>
> # That in turn had a problem: in the original patch submitted for KDE konsole
> # in 2006, the submitter and the developer alike overlooked a "color space
> # identifier" parameter. This version provides for that parameter:
> xterm+direct|xterm with direct-color indexing,
> [...]
>
> setab=\E[%?%p1%{8}%<%t4%p1%d%e48\:2\:\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
>
> setaf=\E[%?%p1%{8}%<%t3%p1%d%e38\:2\:\:%p1%{65536}%/%d\:%p1%{256}%/%{255}%&%d\:%p1%{255}%&%d%;m,
>
>
>
>
>
>
> Between the two ("xterm-direct"and "xerm-direct2"), I see
> the diffeence in at least "\:2\:\:" and "\:2\:".
> respectively -- "xterm-direct" has an additioal "\:"
>
>
>
>
> So, should Emacs be changed to accommadate the missing
> parameter ("\:" as in "xterm-direct")??
>
> Or should the information in "efaq" be changed to specify
> "xterm-direct2"?
>
> Or...?
>
> Can anyone else confirm that colors are not displayed
> in Emacs TTY when using TERMINFO's 6.1 definition of
> "xterm-direct" (setab/setaf)?
Thanks for reporting this.
Rami, could you please take a look?