Re: Highlight tabulated and trailing whitespace

[steve-humphreys]

I cannot understand why the following code is giving me a lisp error.

(defun display-cycle ()
  "Toggle Display-Line-Numbers mode in all buffers."
  (interactive)

  (let ((n display-cycle-state))

    (pcase n
      (1 (whitespace-mode)
         (setq-local display-cycle-state 2))

      (2 (ruler-mode 0)
         (setq line-number-mode nil)
         (setq column-number-mode nil)
         (global-display-line-numbers-mode)
         (setq-local display-cycle-state 3))

      (_ (ruler-mode 1)
         (setq line-number-mode t)
         (setq column-number-mode t)
         (global-display-line-numbers-mode)
         (setq-local display-cycle-state 1))) ))





> Sent: Monday, December 28, 2020 at 2:10 PM
> From: steve-humphreys@gmx.com
> To: moasenwood@zoho.eu
> Cc: help-gnu-emacs@gnu.org
> Subject: Re: Highlight tabulated and trailing whitespace
>
> Have tried the following two lines to no effect
>
> (require 'whitespace)
> (whitespace-mode)
>
> But then if I use "H-k" to toggle, the command works.  What is happening???
>
> (global-set-key (kbd "H-k") 'whitespace-mode)
>
>
>
>
> > Sent: Monday, December 28, 2020 at 1:11 PM
> > From: "Emanuel Berg via Users list for the GNU Emacs text editor" 
> > <help-gnu-emacs@gnu.org>
> > To: help-gnu-emacs@gnu.org
> > Subject: Re: Highlight tabulated and trailing whitespace
> >
> > steve-humphreys wrote:
> >
> > > I have tried to show tab marks, but the following commands
> > > are confusing me. One can use a backgrouund colour and
> > > introduce a tab mark. But I have no idea how to
> > > achieve them.
> > >
> > >   (setq whitespace-style '(face tabs))
> >
> > Then just set the `whitespace-tab' face, to some face other
> > than what the default face has,
> >
> > (insert "\t <-- this is a tab")
> >
> > and enable the mode.
> >
> > --
> > underground experts united
> > http://user.it.uu.se/~embe8573
> > https://dataswamp.org/~incal
> >
> >
> >
>
>