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bug#60399: 30.0.50; Usage of `isearch-open-invisible-temporary' is not d
From: |
Juri Linkov |
Subject: |
bug#60399: 30.0.50; Usage of `isearch-open-invisible-temporary' is not documented |
Date: |
Thu, 29 Dec 2022 19:33:01 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/30.0.50 (x86_64-pc-linux-gnu) |
> According to isearch.el source, one can use
> `isearch-open-invisible-temporary' to implement custom hidden text
> display during isearch. However, it is unclear what are the requirements
> for that function.
>
> From isearch source code, it appears that the function should accept two
> arguments: overlays and a flag to open/close the overlay:
>
> ;; Some modes would want to open the overlays temporary during
> ;; isearch in their own way, they should set the
> ;; `isearch-open-invisible-temporary' to a function doing this.
> (funcall (overlay-get ov 'isearch-open-invisible-temporary) ov nil)
>
> However, it appears that deleting the passed overlay is, in fact,
> prohibited. (manifested in
> https://orgmode.org/list/87pmc4smdg.fsf@fastmail.fm)
>
> Is there some detailed information about this feature available somewhere?
I don't know about this function more than you can read from source code,
but can find two mentions in (info "(elisp) Invisible Text") and
(info "(elisp) Overlay Properties").