Re: line correction

[mf <massifr@fastwebnet.it>]

Thank you Henri,
a slightly modified version of your solution works!

This is what I wanted to achieve:

\setuplayout[grid=both]
\setupquotation[before={\switchtobodyfont[9pt]}]

\starttext
\showgrid

\input knuth

\startlinecorrection[halfline]
\startquotation
  \input sapolsky
\stopquotation
\stoplinecorrection

\input knuth
%\vadjust pre{\blank[line]}% not line, but halfline!
\vadjust pre{\blank[halfline]}%
$\displaystyle{\frac{1}{a + b}}$
%\vadjust{\blank[line]}% not line, but halfline!
\vadjust{\blank[halfline]}%
\input knuth

\stoptext

In general, I'm ok without grid snapping, because the default
typesetting of taller formulas inside text is good enough for my goals.

But I have many quotations (and floats), whose spaces before and after
should be manually tuned not to push the main text out of the grid.
And here grid snapping does a very good (and automated) job.

But sometimes grid snapping is too strict, as in the tall formula
example. I'm still afraid it's too strict and it will hurt in other
places of the text, but now I have a solution, at least for that
problem.
So thank you again,
best regards,
Massi

Il giorno ven, 29/09/2017 alle 10.55 +1300, Henri ha scritto:
> On Thu, 2017-09-28 at 23:30 +0200, mf wrote:
> > Thank you Henri.
> > 
> > Now consider this:
> > -------------------------------
> > \setuplayout[grid=both]
> > \setupquotation[before={\switchtobodyfont[9pt]}]
> > 
> > \starttext
> > \showgrid
> > 
> > \input knuth
> > 
> > \startlinecorrection[halfline]
> > \startquotation
> >   \input sapolsky
> > \stopquotation
> > \stoplinecorrection
> > 
> > \input knuth
> > $\displaystyle{\frac{1}{a + b}}$
> 
> If you are really keen on screwing up your linespacing you can use
> 
> \vadjust pre{\blank[line]}%
> $\displaystyle{\frac{1}{a + b}}$
> \vadjust{\blank[line]}%
> 
> as a one-off solution.  But better make it a displayed formula or
> tweak it such that it does not
> disrupt spacing and blends in with the text.  In this example I'd
> change $\displaystyle\frac{1}{a +
> b}$ to $(a+b)^{-1}$.  Trust someone who does math typesetting every
> day.
> 
> > \input knuth
> > 
> > \stoptext
> > -------------------------------
> > 
> > Now the text snaps to the grid after the quotation, but the tall
> > formula inside the text overlaps with the text lines.
> > 
> > The solution would be a grid configuration that gives the line
> > containing the formula two lines of height, putting that only line
> > in
> > the middle and then snapping the following lines again to the grid
> > (still solving the alignment of quotations as in the grid=both
> > case).
> > Is it possible?
> > 
> > Best regards,
> > Massi
> > 
> > Il giorno ven, 29/09/2017 alle 08.48 +1300, Henri ha scritto:
> > > 
> > > On Thu, 2017-09-28 at 16:21 +0200, MF wrote:
> > > > 
> > > > Hello list, 
> > > > I would like ConTeXt to snap normal text to grid after a
> > > > quotation.
> > > > This example does not work:
> > > > 
> > > > --------------
> > > > \setupquotation[before={\switchtobodyfont[9pt]}]
> > > > 
> > > > \starttext
> > > > \showgrid
> > > > 
> > > > \input knuth
> > > > 
> > > > \startlinecorrection[halfline]
> > > > \startquotation
> > > >   \input sapolsky
> > > > \stopquotation
> > > > \stoplinecorrection
> > > > 
> > > > \input knuth
> > > > 
> > > > \stoptext
> > > > --------------
> > > > 
> > > > If I prepend a \setuplayout[grid=yes], it works, but grid
> > > > snapping
> > > > introduces also other side effects I don't want (i.e. tall
> > > > formulas
> > > > inside text taking too much vertical space).
> > > > 
> > > > I would like the halfline spaces before and after the quotation
> > > > to
> > > > shrink or stretch a bit to the nearest multiple of the main
> > > > text
> > > > line
> > > > height.
> > > > 
> > > > Is there an automatic way to get the normal text "return" on
> > > > the
> > > > grid
> > > > after a quotation without turning on a global grid snapping?
> > > 
> > > \setuplayout[grid=both] to round down both height and width when
> > > snapping.
> > > 
> > > > 
> > > > 
> > > > Thanks,
> > > > Massi
> > > > 
> > 
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