How to check the -nw option?

How to check the -nw option?

[Kiwon Um]

Hello. Here's a question.

Some modes do not work with terminal base, i.e. no-window-system (-nw)
emacs. So I want to write my .emacs with checking if it's no-window-
emacs emacs or not. How I can check this?

Thanks.

Re: How to check the -nw option?

[Teemu Likonen]

On 2009-05-10 18:37 (-0700), Kiwon Um wrote:

> Some modes do not work with terminal base, i.e. no-window-system (-nw)
> emacs. So I want to write my .emacs with checking if it's no-window-
> emacs emacs or not. How I can check this?

Check the variable "window-system". Its value is nil if Emacs is not
running in a window system. The manual section is here:

    M-x elisp-index-search RET window-system RET

Re: How to check the -nw option?

[Kiwon Um]

On 5월11일, 오후1시40분, Teemu Likonen <tliko...@iki.fi> wrote:
> On 2009-05-10 18:37 (-0700), Kiwon Um wrote:
>
> > Some modes do not work with terminal base, i.e. no-window-system (-nw)
> > emacs. So I want to write my .emacs with checking if it's no-window-
> > emacs emacs or not. How I can check this?
>
> Check the variable "window-system". Its value is nil if Emacs is not
> running in a window system. The manual section is here:
>
>     M-x elisp-index-search RET window-system RET

Thanks.
It is really what I wanted.
(if (not (eq window-system nil)) ...) works well. :)

Re: How to check the -nw option?

[Teemu Likonen]

On 2009-05-10 23:09 (-0700), Kiwon Um wrote:

> (if (not (eq window-system nil)) ...) works well. :)

Yes. For boolean tests one can just do

    (if (not window-system)
        THEN-FORM
      ELSE-FORMS)

or if only one "if" branch is needed, then perhaps

    (unless window-system
      THEN-FORMS)

Re: How to check the -nw option?

[Pascal J. Bourguignon]

Kiwon Um <um.kiwon@gmail.com> writes:

> On 5월11일, 오후1시40분, Teemu Likonen <tliko...@iki.fi> wrote:
>> On 2009-05-10 18:37 (-0700), Kiwon Um wrote:
>>
>> > Some modes do not work with terminal base, i.e. no-window-system (-nw)
>> > emacs. So I want to write my .emacs with checking if it's no-window-
>> > emacs emacs or not. How I can check this?
>>
>> Check the variable "window-system". Its value is nil if Emacs is not
>> running in a window system. The manual section is here:
>>
>>     M-x elisp-index-search RET window-system RET
>
> Thanks.
> It is really what I wanted.
> (if (not (eq window-system nil)) ...) works well. :)

Please, write it:
 
  (when window-system
     ...)

or at the very least:

  (unless (null window-system)
     ...)

-- 
__Pascal Bourguignon__

Re: How to check the -nw option?

[Kiwon Um]

On 5월11일, 오후3시31분, p...@informatimago.com (Pascal J. Bourguignon)
wrote:
> Kiwon Um <um.ki...@gmail.com> writes:
> > On 5월11일, 오후1시40분, Teemu Likonen <tliko...@iki.fi> wrote:
> >> On 2009-05-10 18:37 (-0700), Kiwon Um wrote:
>
> >> > Some modes do not work with terminal base, i.e. no-window-system (-nw)
> >> > emacs. So I want to write my .emacs with checking if it's no-window-
> >> > emacs emacs or not. How I can check this?
>
> >> Check the variable "window-system". Its value is nil if Emacs is not
> >> running in a window system. The manual section is here:
>
> >>     M-x elisp-index-search RET window-system RET
>
> > Thanks.
> > It is really what I wanted.
> > (if (not (eq window-system nil)) ...) works well. :)
>
> Please, write it:
>
>   (when window-system
>      ...)
>
> or at the very least:
>
>   (unless (null window-system)
>      ...)
>
> --
> __Pascal Bourguignon__

Thanks for all advices. :)