Charles Campbell wrote:
> Vince Negri wrote:
> > From: Ben Fritz [mailto:[email protected]]
> >
> >
> >> On Jul 10, 1:18 pm, "Benjamin R. Haskell"<[email protected]> wrote:
> >>
> >>> Multiple conceal matches/regions get collapsed into a single character.
> >>> I'm not sure if this is intended, but it is certainly confusing.
> >>>
> >
> >> I think it is intended, for use cases like multiple invisible markers
> >> to provide syntax highlighting to otherwise plain text (e.g.
> >> TxtFormat, AnsiiEsc). However, I think we should allow other use cases
> >> such as Greek characters in Tex, which could be VERY useful and
> >> probably not that much harder to implement.
> >>
> >
> > It is a little harder than you might initially think, because conceal lets
> > syntax highlighting do most of the dirty work for it - so as it stands,
> > a succession of single to-be-replaced characters is presented to the engine
> > as
> > a single region of "concealed text". But now that conceal is officially in
> > the tree, it becomes more possible to propose changes to the syntax
> > highlighting
> > code that might facilitate your TeX usage example.
> >
> Hello!
>
> I tried the following trick:
>
> syn match texGreek '\\alpha\>' contained conceal cchar=á nextgroup=texGreek2
> syn match texGreek2 '\\alpha\>' contained conceal cchar=á nextgroup=texGreek
>
> So $\alpha\alpha$ has the first \alpha as texGreek, and the second one
> as texGreek2 . Unfortunately, although the syntax highlighting treated
> the two differently, the conceal code still merges the two, using only
> the one á instead of what I'd hoped (áá).
Makes sense. We can get the ID of the syntax item, and use a change in
that as a signal to display the conceal character.
I have implemented that, please try it out and let us know.
If this doesn't work as intended, we should roll it back.
Soon we can't make incompatible changes, thus please let's figure out
how this should work very soon!
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