Re: forward-comment and syntax-ppss

[Dmitry Gutov]

On 17.12.2016 01:16, Drew Adams wrote:

> Not a problem for me.  And doesn't have to be a problem for
> vanilla Emacs users either, if the proper commands are added.

You're actually proposing a change to the current narrowing-widening UI 
and API. That should indicate that the current one is insufficient, or, 
has problems.

I'm not in any hurry to adopt it, though, because it doesn't solve any 
multi-mode problems. Not by itself, at least.

> In my case:
> 1. `C-x n n' to "focus on reading" a paragraph in the node.
> 2. `C-x n x' to return to the full node (not all of Info).
> End of story.

What happens if you press `C-x n x' once more?

In any case, you've introduced "a different kind of narrowing" yourself. 
Your `C-x n n' command does something else than just call narrow-to-region.

> > 2. Multi-mode usage where the framework delegates to each
> > subregion's major mode for fontification and indentation.
>
> I can't speak to that (too vague for me).

I've described it in more detail numerous times. Please go ahead and use 
the search.

> But a wild guess might
> be that maybe "the framework" should _not_ blindly so delegate.
> IOW, if it hurts, don't do it.  Maybe a better sauce is needed
> for the recipe.  Or maybe the delegate itself needs to be
> improved, before it can be delegated this way.
> [...]

Not helpful.

> Seems like font-lock etc. code should be able
> to do whatever narrowing it needs to do (modulo, perhaps,
> communicating what it's done).

We want to highlight different regions using different sets of font-lock 
rules.

> If that is wrong for a potential
> caller then the caller might need to do something different.

What?