Re: Using auto-format with LaTeX

Christian Brabandt wrote:

> Hi Marcin!
>
> On So, 10 Feb 2013, Marcin Szamotulski wrote:
>
> > On 12:19 Sat 09 Feb , Zyad wrote:
> > > Hi,
> > >
> > > I'm finding the auto-format option very attractive (setl fo+=a), but I'm having trouble getting it to work nicely when editing LaTeX documents.
> > >
> > > More specifically, I'd like to make it aware of LaTeX keywords so that, for example, when writing the following,
> > >
> > > This is a paragraph that is properly
> > > formatted to have a textwidth of 40.
> > > 'auto-format' helps maintain it in a
> > > formatted form, even if I edit parts of
> > > it.
> > > \begin{equation}
> > > z^2 = x^2 + y^2
> > > \end{equation
> > >
> > > as soon as I enter '\', the cursor moves to the previous line. Is it possible to have auto-format understand that a keyword like '\begin{' should not be considered part of the paragraph before it? I'm aware of formatoptions' 'w' flag, but it is inconvenient for me since the document is usually edited by others.
> > >
> > > Thanks,
> > > Zyad
> >
> > The problem is that vim the 'paragraphs' setting accepts only nroff
> > macros. ATP (http://atp-vim.sf.net) defined a map gW which detects
> > paragraphs and formats them - it is still not what you (and me) wanted
> > but it a bit better.
>
> Personally, I have never used nroff macros and I think the 'paragraphs'
> and 'sections' setttings are pretty useless, if you can't use regular
> expressions.
>
> Does anything speak against having a special casing of the 'paragraphs'
> and 'sections' option to use a regular expression pattern to test
> against if it starts with a '/'?
>
> Attached is a toy patch.

It's an idea. Several users have asked for a more flexible way to
define paragraph boundaries.

I think the help needs some more work. How is the regular expression
used? What if a two-character part before it already matched?
An example would be helpful.


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