Re: outline-mode treesitter support?

[Juri Linkov <juri@linkov.net>]

>>> OK, one way to extract treesit information for outline-minor-mode is by using
>>> ‘treesit-simple-imenu’ because outline headings should correspond to imenu entries.
>>
>> I don't know if this is a good idea, but with
>>
>>  (setq-local outline-search-function #'outline-search-imenu
>>              outline-level (lambda () 1))
>>
>> this should do the trick:
>>
>> (defun outline-search-imenu (&optional bound move backward looking-at)
>>  (unless imenu--index-alist
>>    (imenu--make-index-alist))
>>  (let* ((imenu-index (cdar imenu--index-alist))
>> [...]
>
> Thanks for the example!

After trying to use this, I came to conclusion that imenu--index-alist
is unsuitable for outline-minor-mode because imenu has a different
hierarchy than the source files, so outline-level can be only 1.
But without different levels for outline-level it's quite useless.

However, in the opposite direction mapping the outline hierarchy
to imenu is possible, and outline-imenu-generic-expression
does this, but only to a flat list that is sorted alphabetically.