framed getbuffer

framed getbuffer

[Wolfgang Werners-Lucchini]

Hallo!

The following simple example doesn't compile
(ConTeXt ver. 2007.01.02 and Live ConTeXt).

What am I doing wrong?

\starttext
\startbuffer
\startformula
x^2 = x\cdot x
\stopformula
\stopbuffer
\framed{\getbuffer}
\stoptext


Wolfgang

Re: framed getbuffer

[Taco Hoekwater]

Wolfgang Werners-Lucchini wrote:
> Hallo!
> 
> The following simple example doesn't compile
> (ConTeXt ver. 2007.01.02 and Live ConTeXt).
> 
> What am I doing wrong?

Diagnostics:

The problem is not caused by the \framed, but by the (lack of)
parsing done by the buffering routines.
Because the \startformula is not expanded, TeX does not realise
you are in math mode, so it objects to the ^ character.

This is 'not right' but I suspect it is not all that simple
to fix the context core to do this properly (I would love to be
proved wrong).

You probably have to create small input files and use \input
and \typefile instead

Best wishes,

Taco

Re: framed getbuffer

[Aditya Mahajan]

On Thu, 22 Mar 2007, Taco Hoekwater wrote:

> Wolfgang Werners-Lucchini wrote:
>> Hallo!
>>
>> The following simple example doesn't compile
>> (ConTeXt ver. 2007.01.02 and Live ConTeXt).
>>
>> What am I doing wrong?
>
> Diagnostics:
>
> The problem is not caused by the \framed, but by the (lack of)
> parsing done by the buffering routines.
> Because the \startformula is not expanded, TeX does not realise
> you are in math mode, so it objects to the ^ character.
>
>
> This is 'not right' but I suspect it is not all that simple
> to fix the context core to do this properly (I would love to be
> proved wrong).

This is a serious bug. Even a simple example fails with the same 
error.

\starttext
\framed{
\startformula
x^2 = x\cdot x
\stopformula}
\stoptext

A quick workaround is to use frametext instead of framed, but I am 
pretty sure that the above example used to work at some stage.

Aditya

Re: framed getbuffer

[luigi scarso]

> This is a serious bug. Even a simple example fails with the same
> error.
>
> \starttext
> \framed{
> \startformula
> x^2 = x\cdot x
> \stopformula}
> \stoptext
>
> A quick workaround is to use frametext instead of framed, but I am
> pretty sure that the above example used to work at some stage.

hmm, I can test with two older release.
Same error.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
This is pdfeTeXk, Version 3.141592-1.11a-2.1 (Web2C 7.5.2)
(format=cont-en 2005.8.26)  11 APR 2007 12:12
entering extended mode
 %&-line parsing enabled.
**&cont-en t.tex
(./t.tex{/usr/share/texmf/pdftex/config/pdftex.cfg}
ConTeXt  ver: 2002.6.25  fmt: 2005.8.26  int: english  mes: english
! Missing $ inserted.
<inserted text>
                $
<to be read again>
                   ^
l.4 x^
      2 = x\cdot x
%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%
This is pdfeTeX, Version 3.141592-1.21a-2.2 (Web2C 7.5.4)
(format=cont-en 2006.3.2)  11 APR 2007 12:05
entering extended mode
 (/usr/share/texmf/web2c/natural.tcx)
**&cont-en t.tex
(./t.tex

ConTeXt  ver: 2005.01.31  fmt: 2006.3.2  int: english  mes: english

! Missing $ inserted.
<inserted text>
                $
<to be read again>
                   ^
l.4 x^
      2 = x\cdot x
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

luigi

Re: framed getbuffer

[Wolfgang Schuster]

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2007/4/11, Aditya Mahajan <adityam@umich.edu>:
>
> On Thu, 22 Mar 2007, Taco Hoekwater wrote:
>
> > Wolfgang Werners-Lucchini wrote:
> >> Hallo!
> >>
> >> The following simple example doesn't compile
> >> (ConTeXt ver. 2007.01.02 and Live ConTeXt).
> >>
> >> What am I doing wrong?
> >
> > Diagnostics:
> >
> > The problem is not caused by the \framed, but by the (lack of)
> > parsing done by the buffering routines.
> > Because the \startformula is not expanded, TeX does not realise
> > you are in math mode, so it objects to the ^ character.
> >
> >
> > This is 'not right' but I suspect it is not all that simple
> > to fix the context core to do this properly (I would love to be
> > proved wrong).
>
> This is a serious bug. Even a simple example fails with the same
> error.
>
> \starttext
> \framed{
> \startformula
> x^2 = x\cdot x
> \stopformula}
> \stoptext
>
> A quick workaround is to use frametext instead of framed, but I am
> pretty sure that the above example used to work at some stage.
>
> Aditya


Hi Aditya,

it is more a problem related to horizontal and vertical modes/boxes, you can
test it by placing \startformula .. \startformula into a hbox/vbox and only
the
vbox solution works.

This is working

\vbox
  {\startformula
   x^2 = x\cdot x
   \stopformula}

This fails

\hbox
  {\startformula
  x^2 = x\cdot x
  \stopformula}

You can use disply math in a frame by setting explivied values for width
and height of the frame.

\framed
  [width=5cm,height=4cm]
  {\startformula
   x^2 = x\cdot x
   \stopformula}

This solution works also in combination with a buffer

\startbuffer
\startformula
x^2 = x\cdot x
\stopformula
\stopbuffer

\framed[width=6cm,height=4cm]{\getbuffer}


Wolfgang

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Re: framed getbuffer

[Taco Hoekwater]

>> On Thu, 22 Mar 2007, Taco Hoekwater wrote:
>>
>> > Diagnostics:
>> >
>> > The problem is not caused by the \framed, but by the (lack of)
>> > parsing done by the buffering routines.
>> > Because the \startformula is not expanded, TeX does not realise
>> > you are in math mode, so it objects to the ^ character.


That was obviously the wrong diagnosis. Just lucky that the patient
didn't die.

Also interesting:

   \setuplayout[grid=yes]
   \hbox{\startformula x^2 \stopformula}

(I tried that because in grid  mode, the \startformula wraps the
body inside a \vbox)

Well done Wolfgang,

Taco

Re: framed getbuffer

[Aditya Mahajan]

On Wed, 11 Apr 2007, Wolfgang Schuster wrote:

> 2007/4/11, Aditya Mahajan <adityam@umich.edu>:
>> 
>> On Thu, 22 Mar 2007, Taco Hoekwater wrote:
>> 
>> > Wolfgang Werners-Lucchini wrote:
>> >> Hallo!
>> >>
>> >> The following simple example doesn't compile
>> >> (ConTeXt ver. 2007.01.02 and Live ConTeXt).
>> >>
>> >> What am I doing wrong?
>> >
>> > Diagnostics:
>> >
>> > The problem is not caused by the \framed, but by the (lack of)
>> > parsing done by the buffering routines.
>> > Because the \startformula is not expanded, TeX does not realise
>> > you are in math mode, so it objects to the ^ character.
>> >
>> >
>> > This is 'not right' but I suspect it is not all that simple
>> > to fix the context core to do this properly (I would love to be
>> > proved wrong).
>> 
>> This is a serious bug. Even a simple example fails with the same
>> error.
>> 
>> \starttext
>> \framed{
>> \startformula
>> x^2 = x\cdot x
>> \stopformula}
>> \stoptext
>> 
>> A quick workaround is to use frametext instead of framed, but I am
>> pretty sure that the above example used to work at some stage.
>> 
>> Aditya
>
>
> Hi Aditya,
>
> it is more a problem related to horizontal and vertical modes/boxes, you can
> test it by placing \startformula .. \startformula into a hbox/vbox and only
> the
> vbox solution works.

Ah! Thanks for the explanation.

Aditya