Re: Treesitter query question, matching only substring of a node

[Danny Freeman]

Yuan Fu <casouri@gmail.com> writes:

>> On Dec 5, 2022, at 7:25 AM, Danny Freeman <danny@dfreeman.email> wrote:
>> 
>> 
>> Yuan Fu <casouri@gmail.com> writes:
>> 
>>> I suggest capturing the whole node and using a function to fontify the 
>>> symbol. With a function you
>>> can do anything you want, including applying different faces to substrings. 
>>> To do that, simply
>>> define a function and use the function name as the capture name.
>>> 
>>> You can have a look at c-ts-mode--fontify-variable for a simple example.
>> 
>> This is exactly what I was looking for. I can't believe I didn't think
>> of this when I was reading the documentation.
>> 
>> Thank you for your help!
>
> Let me know if you have ideas on how could the documentation be improved to 
> make it clearer. I have the curse of knowledge on me and everything seems so 
> easy and clear ;-) 
>
> Yuan

So far I am only working on font locking, and have NO experience with
font locking in Emacs or with tree-sitter. With that in mind, using the
starter-guide file, the html-manual, an existing grammar, and examples
from python mode, I was able to get a working prototype in clojure-mode
in 1 day. I think that speaks to the quality of the documentation!

The treesit-explore-mode is a really great tool for implementing the
syntax highlighting as well. It is a real treat to work with.

Here is how I ended up using a function to fontify the symbols the way I
needed to, in case you are curious:

https://github.com/dannyfreeman/clojure-mode/blob/513403c5e97330b65d024e2e904c165021540480/clojure-ts-mode.el#L162-L177

Right now that entire file is a rough proof of concept. There is a lot
more work that needs to be done before it's ready for the general
public.

-- 
Danny Freeman