(sorry, further hijacking this thread)

Eric: I made a slight improvement to your code (see the =setq e=) so that the empty space at the end of the line gets highlighted as in the default behavior instead of only highlighting the part of the line that contains text:

#+begin_src emacs-lisp

(defun esf/get-visual-line-range ()
(let (b e)
(save-excursion
(beginning-of-visual-line)
(setq b (point))
(end-of-visual-line)
(setq e (+ 1 (point)))
)
(cons b e)))

#+end_src

--Diego

On Thu, Oct 31, 2019 at 5:03 PM Diego Zamboni <diego@zzamboni.org> wrote:

Hi Eric,

Nice! Thanks for the tip :)

--Diego

On Thu, Oct 31, 2019 at 4:56 PM Fraga, Eric <e.fraga@ucl.ac.uk> wrote:
On Thursday, 31 Oct 2019 at 08:52, Diego Zamboni wrote:
> Since I use =visual-line-mode= as well in my org documents, the effect is
> to highlight the whole current paragraph (which is a single line in the
> file).

In case you find this useful, I found that highlighting the whole
paragraph was too much; I want just the actual "physical" line where
point is highlighted, whether it continues on or not. I do this:

#+begin_src emacs-lisp
(defun esf/get-visual-line-range ()
(let (b e)
(save-excursion
(beginning-of-visual-line)
(setq b (point))
(end-of-visual-line)
(setq e (point))
)
(cons b e)))
(setq hl-line-range-function #'esf/get-visual-line-range)
#+end_src

Of course, this is not what the OP wanted so excuse the diversion.

--
Eric S Fraga via Emacs 27.0.50, Org release_9.2.6-552-g8c5a78