[DISCUSS] "same text-property competing" problem in external packages

[DISCUSS] "same text-property competing" problem in external packages

[stardiviner]

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I got a problem when more than one Emacs package competing on setting
text-property on same target from different packages.

Here is the original problem and discussion link:
https://github.com/nobiot/org-transclusion/issues/166

Does anybody have a good idea to solve this problem?

Thanks for your idea and suggestions.

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Re: [DISCUSS] "same text-property competing" problem in external packages

[Ihor Radchenko]

stardiviner <numbchild@gmail.com> writes:

> I got a problem when more than one Emacs package competing on setting
> text-property on same target from different packages.
>
> Here is the original problem and discussion link:
> https://github.com/nobiot/org-transclusion/issues/166
>
> Does anybody have a good idea to solve this problem?

I am not sure which property you are referring to.

There is a number of possible solutions you may use depending on what is
more appropriate for your specific use case:

1. Use overlays with 'priority property. That way, you can "overlay" the
   property above/below existing and Emacs will automatically restore
   the existing value upon removing your overlay. This is the most
   common approach.

2. You can utilize `char-property-alias-alist' and actually store your
   property value in a different property. This will make the priority
   of the existing property _strictly higher_ than yours. org-fold-core
   uses this approach.

3. You can store a "backup" of the existing property and restore it when
   your minor mode is disabled. isearch.el uses this approach.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
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