Question: add-face-text-property for 'font-lock-face?

[Qiantan Hong <qhong@mit.edu>]

That’s an option, but I’m worried about performance because crdt-visuallize-author-mode
need to color code the whole document and that might be too many overlays.
Maybe one can lazily create overlay for visible part only but I feel like
at that point I’ll probably just reinvent an adhoc add-font-lock-face-text-property in Elisp.

> On Aug 28, 2021, at 9:24 PM, Yuan Fu <casouri@gmail.com> wrote:
> 
> 
> 
>> On Aug 28, 2021, at 9:13 PM, Qiantan Hong <qhong@mit.edu> wrote:
>> 
>> Users of crdt.el report that crdt-visualize-author-mode (which use font-lock-face to color code author of texts)
>> conflict with faces from other modes. Apparently there are more than 1 mode which sets this text property.
>> 
>> Is there some way to add-face-text-property to 'font-lock-face property, 
>> i.e. adding new face attributes instead of overwriting any existing face?
>> add-face-text-property doesn’t seem to work because 'font-lock-face will just override ‘face.
>> 
>> Best,
>> Qiantan
>> 
> 
> Is there anything preventing you from using overlays? They seem to be perfect for the job.
> 
> Yuan