bug#74610: 31.0.50; Submitting mhtml-ts-mode, treesitter alternative to mhtml-mode

[Vincenzo Pupillo <v.pupillo@gmail.com>]

Ciao Dmitry,

In data giovedì 5 dicembre 2024 17:51:55 Ora standard dell’Europa centrale, 
Dmitry Gutov ha scritto:
> Hi Vincenzo,
> 
> On 04/12/2024 12:47, Vincenzo Pupillo wrote:
> >> Do you foresee cases for when html-ts-mode would be preferred by the
> >> user instead of this advanced mhtml-ts-mode?
> > 
> > For everyday use mhtml-ts-mode is better, just like mhtml-mode (which has
> > been the default for html editing for a while now).
> > 
> >> Or maybe the former is
> >> better in its current shape when used by e.g. php-ts-mode?
> > 
> > Yes, personally I think that major modes that handle (for tree-sitters)
> > only one language are easier to put together at the moment. It's Lego vs.
> > Playmobil.
> > We are in an experimental phase, like all other editors.
> > See https://github.com/helix-editor/helix/pull/1170#issuecomment-997294090
> > In some ways, by having a different approach from other editors, we have a
> > greater degree of flexibility IMHO.
> 
> Makes sense, thanks.
> 
> >> In other words, I'm wondering why not update the existing mode with
> >> sub-parsers rather than add a new one. html-mode had such a reason -
> >> it's quite old, and has been used in various placed the way it is now
> >> (including multi-mode packages). But ts modes don't work too well with
> >> multi-mode packages, not currently anyway.
> > 
> > It's something I've thought about but haven't tried yet.
> > One of the themes of the email thread (on emacs-devel) was to have a
> > simple
> > multi language major mode that was also a sort of “user's guide.”
> 
> I though the updated html-ts-mode could be that mode. Anyway, good to
> hear that this alternative had been given consideration.

Since the development of Emacs 31 has just started and this major mode is not 
urgent, I will try some experiments in the next few days to see if html-ts-
mode can be modified without compromising the integration with php-ts-mode.

Vincenzo