Re: Question collaborative editing - Wikipedia reference

[Qiantan Hong]

(Part of) it can be done there if we’ve decided on “how to filter”.
In the current way doing so is not required. But the question is
“how to filter”.

Let the user providing an arbitrary predicate (overlay->bool) seems to be
the most canonical, but it’s not. How to compose multiple predicates
provided by user? Or we can just let user do it and accept only one predicate.
But even so, apparently one piece of information missing is where the
overlay comes from. Lots of command don’t assign any ‘category
to the overlay their created and it’s hard to tell what the overlay is for
just by looking at the overlay object. In fact, currently I don’t use
any user provided predicate and filter solely based on what command
creates the overlay (by advising it to add a ‘crdt-meta property) and it
works well for org-mode folding, but I’m not sure if that works in other
scenarios.


> On Oct 11, 2020, at 2:56 PM, Eli Zaretskii <eliz@gnu.org> wrote:
> 
>> From: Qiantan Hong <qhong@mit.edu>
>> CC: Joe Corneli <holtzermann17@gmail.com>,
>>        "joakim@verona.se"
>>      <joakim@verona.se>, Yuan Fu <casouri@gmail.com>,
>>        Fermin <fmfs@posteo.net>, Jean Louis <bugs@gnu.support>,
>>        Caio Henrique <caiohcs0@gmail.com>, Ergus
>>      <spacibba@aol.com>,
>>        Noam Postavsky <npostavs@gmail.com>, Karl Fogel
>>      <kfogel@red-bean.com>,
>>        Stefan Monnier <monnier@iro.umontreal.ca>,
>>        "Emacs
>> developers" <emacs-devel@gnu.org>
>> Date: Sun, 11 Oct 2020 18:26:25 +0000
>> 
>> It does, but I don’t think it make sense to synchronize *every*
>> overlay/text property changes. For example, syntax highlight
>> can be done locally and doesn’t need to be synced over Internet.
>> I’m using hightlight-line and highlight-parenthesis, those overlay don’t
>> need to be synced as well. There has to be some customizable filtering
>> (I was filtering based on what command created the overlays).
> 
> These hooks can do the filtering, no?

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