bug#36361: 'hl-line-range-function' as list of choice

[Lars Ingebrigtsen <larsi@gnus.org>]

Sebastian Urban <mrsebastianurban@gmail.com> writes:

> Because 'hl-line-mode' highlight logical line instead of screen line
> when 'visual-line-mode' is active, and for example 'C-a' and 'C-e'
> change behaviour, some people want 'hl-line-mode' to change the
> behaviour as well.  They usually use 'hl-line-range-function' to
> define how it should highlight, but... cannot it be made simpler?
> Like by making 'hl-line-range-function' a list of choice:
> - nil for default behaviour,
> - "Screen line" to change to screen line,
> - "Function" for user to write what he wants.

I think that makes sense, and I think `visual-line-mode' should adjust
`hl-line-range-function' automatically to do the visual line highlight.

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