# [NTG-context] beta

Otared Kavian otared at gmail.com
Thu Feb 16 14:53:48 CET 2012

Hi Hans,

Thanks for the new beta: as a matter of fact it seems to be much faster the previous ones, even with many backgrounds!

I wanted to submit a small bug with the « \prime » in math mode: the following gives an error
%%%%%% begin example.tex
\starttext
The function $\exp$ is the unique solution of
\startformula
u'(x) = u(x) \quad u(0) = 1.
\stopformula
\stoptext
%%%%% end example.tex

The error message is:
\301>c ->\egroup

(
l.6 u'(
x) = u(x) \quad u(0) = 1.

Best regards: OK

On 16 févr. 2012, at 10:17, Hans Hagen wrote:

> Hi,
>
> I uploaded a beta. Apart from some fixes, the biggest change is in dealing with positional info and text backgrounds (first stage cleanup).  As I have no clue to what extend users mess around with background graphics themselves, it's hard to predict side effects, but the biggest impact is speed. The adventurous might want to try out
>
> \setuptextbackground
>  [mp=mpos:par:region,
>   method=mpos:par:region]
>
> or with some more visual tracing
>
> \setuptextbackground
>  [mp=mpos:par:region:kind,
>   method=mpos:par:region]
>
> A simple test with some 200 backgrounds brings down runtime with one second on my machine (not the fastest anyway).
>
> Apart from a performance gain, backgrounds are now also supported in regular multicolumns as well as in some specific mechanisms like tabulate and xtables. In xtables one needs to set region=yes in order to get the desired results. Actually, the region key is a new one in framed so anything that can be framed can also have fancy text  backgrounds.
>
> Yet another improvement is that (although rather untested) you can do things like
>
>    \starttextbackground[r] START
>    \dorecurse{10}{
>        \dorecurse{1}{\input ward }
>        \placefigure[right]{}{}
>        some text before BEGIN \dorecurse{2}{\input ward } END some after
>        \placefigure[left]{}{}
>        some text before BEGIN \dorecurse{2}{\input ward } END some after
>        \placefigure[right]{}{}
>        some text before BEGIN \dorecurse{2}{\input ward } END some after
>    }
>    STOP \stoptextbackground
>    \dorecurse{1}{\input ward }
>
> and get more or less expected results. Keep in mind that it can never get perfect due to all kind of possible interference. Also, keep away from internals as they will quite certainly change.
>
> Hans
>
>
>
> -----------------------------------------------------------------
>                                          Hans Hagen | PRAGMA ADE
>              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>    tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
>                                             | www.pragma-pod.nl
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