Dear all,

the value of the buffer local variable 'show-trailing-whitespace'
determines highlighting of trailing whitespace. This variable can be
customized. However, I could not find an interactive function to toggle
highlighting of trailing whitespace in a particular buffer. Therefore my
attempt to provide such a function is as follows:

;; --------------------------------------------
(defun toggle-show-trailing-whitespace ()
"Toggle highlighting of trailing whitespace."
(interactive)
(if show-trailing-whitespace
(setq show-trailing-whitespace nil)
(setq show-trailing-whitespace t)))
;; --------------------------------------------

And - well - it works somehow, I don't see any misbehaviour so far. But
I'd appreciate some experts' advice whether this approach is ok or
whether it should be done differently.

Thank you.

Uwe Siart writes:

Hi Uwe,

Your function is ok, but this one is shorter. ;-)

Tassilo Horn member.fsf.org> writes:

Thank you for your comments, Tassilo. And yes, setting it on a per-mode
basis will also be useful for me.

On 18 Sep 2008, Uwe Siart wrote:

Looks OK to me. For purely aesthetic reasons you could rewrite it
like this:

(defun toggle-show-trailing-whitespace ()
"Toggle highlighting of trailing whitespace."
(interactive)
(setq show-trailing-whitespace (not show-trailing-whitespace)))

But I don't know that that buys you anything useful.

--
Regards,

joe
Joe Casadonte
jcasadonte@northbound-train.com

"Joe Casadonte" northbound-train.com> writes:

It is instructive to me. Your (and Tassilo's) version is a lot more
elegant.