Is there a bug during pagination of external figures?

Is there a bug during pagination of external figures?

[Stefan Wachter]

Hi all!

Processing a large document containing the following lines:

 >>>>>>>>>>start
\externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_1.png]

\externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_2.png]

\externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_3.png]

\externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_4.png]
<<<<<<<<<<<stop

I encounter the following error:


! Missing $ inserted.
<inserted text>
                $
<to be read again>
                   _
\_...fmmode \mathunderscore \else \textunderscore
                                                  \fi
<argument> {\tfc 8}{\tfb -3\_
                             refkom}{}{}{}
\firstoftwoarguments #1#2->#1

\doattributes ...sname #1#2\@EA \endcsname \fi {#4
                                                  }\dostopattributes
...
l.2691

Line 2691 is the line after the fourth image. If I insert a page break 
before the fourth image

 >>>>>>>>>>start
\externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_1.png]

\externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_2.png]

\externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_3.png]

\page

\externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_4.png]
<<<<<<<<<<<stop

then the error disappears. It seems that Context tries to output the 
filename of the external figure somewhere during pagination. Yet, the 
filename is not ment to appear inside the document!

Does someone know how to work around this problem?
Thanks for your attention,
--Stefan

Re: Is there a bug during pagination of external figures?

[Hans Hagen]

Stefan Wachter wrote:

> Processing a large document containing the following lines:
>
> >>>>>>>>>>start
> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_1.png] 
>
>
> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_2.png] 
>
>
> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_3.png] 
>
>
> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_4.png] 
>
> <<<<<<<<<<<stop

is for some reason the _ an active character ?

In supp-fil you may try the following (add the \_ definition)

\bgroup

\catcode`\/=\@@active
\catcode`\:=\@@active
\catcode`\~=\@@active
\catcode`\_=\@@active

\gdef\sanitizefilename#1\to#2%
  {\bgroup
   \edef/{\string/}%
   \edef:{\string:}%
   \edef~{\string~}%
   \edef_{\string_}%
   \expanded{\xdef\noexpand\sanitizedfilename{#1}}%
   \egroup
   % maybe \convertcommand\sanitizedfilename\to#2%
   \let#2\sanitizedfilename}

\egroup

untested -)

Hans

Re: Is there a bug during pagination of external figures?

[Stefan Wachter]

Hans Hagen wrote:
> Stefan Wachter wrote:
> 
>> Processing a large document containing the following lines:
>>
>> >>>>>>>>>>start
>> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_1.png] 
>>
>>
>> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_2.png] 
>>
>>
>> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_3.png] 
>>
>>
>> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_4.png] 
>>
>> <<<<<<<<<<<stop
> 
> 
> is for some reason the _ an active character ?
> 
> In supp-fil you may try the following (add the \_ definition)
> 
> \bgroup
> 
> \catcode`\/=\@@active
> \catcode`\:=\@@active
> \catcode`\~=\@@active
> \catcode`\_=\@@active
> 
> \gdef\sanitizefilename#1\to#2%
>  {\bgroup
>   \edef/{\string/}%
>   \edef:{\string:}%
>   \edef~{\string~}%
>   \edef_{\string_}%
>   \expanded{\xdef\noexpand\sanitizedfilename{#1}}%
>   \egroup
>   % maybe \convertcommand\sanitizedfilename\to#2%
>   \let#2\sanitizedfilename}
> 
> \egroup
> 
> untested -)
> 
> Hans
Hi Hans,

thanks for the quick reply. I made the proposed changes in the 
supp-fil.tex file. Unfortunately the reported error is still there. I 
also executed "texexec --make ..." and tried again. But it did not help.

Do you have another idea to solve the problem?

Thanks,
--Stefan

Re: Is there a bug during pagination of external figures?

[Stefan Wachter]

Hans Hagen wrote:
> Stefan Wachter wrote:
> 
>> Processing a large document containing the following lines:
>>
>> >>>>>>>>>>start
>> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_1.png] 
>>
>>
>> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_2.png] 
>>
>>
>> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_3.png] 
>>
>>
>> \externalfigure[/home/swachter/projekte/infotakt/vdp/export/bu/bu.ilboo/ziffer8.ilboo/bu8-3_refkom.ilboo/graphics.ilfdr/bu8-3_241-242_4.png] 
>>
>> <<<<<<<<<<<stop
> 
> 
> is for some reason the _ an active character ?
> 
> In supp-fil you may try the following (add the \_ definition)
> 
> \bgroup
> 
> \catcode`\/=\@@active
> \catcode`\:=\@@active
> \catcode`\~=\@@active
> \catcode`\_=\@@active
> 
> \gdef\sanitizefilename#1\to#2%
>  {\bgroup
>   \edef/{\string/}%
>   \edef:{\string:}%
>   \edef~{\string~}%
>   \edef_{\string_}%
>   \expanded{\xdef\noexpand\sanitizedfilename{#1}}%
>   \egroup
>   % maybe \convertcommand\sanitizedfilename\to#2%
>   \let#2\sanitizedfilename}
> 
> \egroup
> 
> untested -)
> 
> Hans
Hi Hans,

thanks for the quick reply. I made the proposed changes but the error is 
still there. (I also run "texexec --make ..." and tried again.)

Do you have another idea that could solve the problem?

Thanks,
--Stefan

Re: Re: Is there a bug during pagination of external figures?

[Hans Hagen]

Stefan Wachter wrote:

> thanks for the quick reply. I made the proposed changes but the error 
> is still there. (I also run "texexec --make ..." and tried again.)
>
> Do you have another idea that could solve the problem?

can you make a small example file? looks like some strange interference with _ being active (Normally not the case); is some module loaded? 

Hans 

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: Re: Is there a bug during pagination of external figures?

[Hans Hagen]

Stefan Wachter wrote:

Could you make a minimal example that fails?

\starttext \externalfigure[x_x.png] \stoptext

works ok here, so there must be something else interfering

Hans

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: Is there a bug during pagination of external figures?

[Stefan Wachter]

[-- Attachment #1: Type: text/plain, Size: 866 bytes --]

Hi Hans,

I attach an example Context file and the included graphics. 
Unfortunately the example is by far not minimal. Can you look at the 
example anyway? If the length of the example causes problems then I may 
try to prune it.

--Stefan

Hans Hagen wrote:
> Stefan Wachter wrote:
> 
> Could you make a minimal example that fails?
> 
> \starttext \externalfigure[x_x.png] \stoptext
> 
> works ok here, so there must be something else interfering
> 
> Hans
> 
> -----------------------------------------------------------------
>                                          Hans Hagen | PRAGMA ADE
>              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
>                                             | www.pragma-pod.nl
> -----------------------------------------------------------------


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Re: Is there a bug during pagination of external figures?

[Patrick Gundlach]

Stefan Wachter <stefan.wachter@gmx.de> writes:

> Hi Hans,
>
> I attach an example Context file and the included graphics.
> Unfortunately the example is by far not minimal. 

The file is just a few bytes, no need to mention...


Just looking at the error message, I bet your problem is at:

\setupheadertexts[text][{\tfc 8}{\tfb-3\_refkom}][]
\setupheadertexts[margin][{\tfc bu}][\ifnum\pageno = 1\NamedExternalLink{../../../../bu/8/8_3_refkom/1/inhalt.pdf}{last}{\symbol[PfeilNachLinks]{} §}\else\PrevOrNextPage{/PrevPage}{\symbol[PfeilNachLinks]{} §}\fi\hskip.5em\ifnum\pageno = \lastpage{§ \symbol[PfeilNachRechts]}\else\PrevOrNextPage{/NextPage}{§ \symbol[PfeilNachRechts]}\fi]


Patrick
-- 
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Re: Is there a bug during pagination of external figures?

[Stefan Wachter]

Patrick Gundlach wrote:
> Stefan Wachter <stefan.wachter@gmx.de> writes:
> 
> 
>>Hi Hans,
>>
>>I attach an example Context file and the included graphics.
>>Unfortunately the example is by far not minimal. 
> 
> 
> The file is just a few bytes, no need to mention...
> 
> 
> Just looking at the error message, I bet your problem is at:
> 
> \setupheadertexts[text][{\tfc 8}{\tfb-3\_refkom}][]
> \setupheadertexts[margin][{\tfc bu}][\ifnum\pageno = 1\NamedExternalLink{../../../../bu/8/8_3_refkom/1/inhalt.pdf}{last}{\symbol[PfeilNachLinks]{} §}\else\PrevOrNextPage{/PrevPage}{\symbol[PfeilNachLinks]{} §}\fi\hskip.5em\ifnum\pageno = \lastpage{§ \symbol[PfeilNachRechts]}\else\PrevOrNextPage{/NextPage}{§ \symbol[PfeilNachRechts]}\fi]
> 
> 
> Patrick
Hi Patrick,

i do not think that the problem is caused by the header texts. The same
header text definition is used during all the document but the problem
is encountered only at a page with several external figures. In
addition, if I insert a new page in between the figures then the problem
disappears (cf. original bug report).

--Stefan

Re: Is there a bug during pagination of external figures?

[Patrick Gundlach]

>> \setupheadertexts[margin][{\tfc bu}][\ifnum\pageno = 1\NamedExternalLink{../../../../bu/8/8_3_refkom/1/inhalt.pdf}{last}{\symbol[PfeilNachLinks]{} §}\else\PrevOrNextPage{/PrevPage}{\symbol[PfeilNachLinks]{} §}\fi\hskip.5em\ifnum\pageno = \lastpage{§ \symbol[PfeilNachRechts]}\else\PrevOrNextPage{/NextPage}{§ \symbol[PfeilNachRechts]}\fi]


> i do not think that the problem is caused by the header texts. 

Well, but removing the header texts gives me a working pdf file.

So it might be a strange interaction between the header text and
figure names.

You should definitely try to reduce the file size to a minimum,
otherwise it is hard to track the problem down.

Patrick
-- 
ConTeXt wiki: http://contextgarden.net
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REALLY STRANGE: (was: Is there a bug during pagination of external figures?)

[Stefan Wachter]

[-- Attachment #1: Type: text/plain, Size: 609 bytes --]

Hi Patrick,

you are right. If I change the header text such that there is no 
underbar in there then the error disappears.

I prunned the example to investigate the situation further. Now I have 
only two pages. If you "texexec" the file then you get the error. If you 
uncomment the \page command at the end then the error disappears.

BUT NOW THE SITUATION REALLY BECOMES STRANGE!

If you delete all *.png files except the one that is included by the 
\externalfigure command then the error also disappears! It seems that 
the behaviour of Context is influenced by the content of the directory!


--Stefan

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error with _ in header?

[Patrick Gundlach]

Hello Stefan,

> I prunned the example to investigate the situation further. Now I have
> only two pages. 

Well, how do you think anybody should be able to debug what you have
done with all the stuff in your document? 

>> You should definitely try to reduce the file size to a minimum,
>> otherwise it is hard to track the problem down.

minimum is far from 150 kb. And please avoid external figures if
possible (there is cow.pdf hacker.jpg and mill.png for download, so
we can all have the same figures to experiment with).

Please do your homework yourself next time:

--------------------------------------------------
\setupoutput[pdftex]

\usetypescript[adobekb][texnansi]
\usetypescript[postscript][texnansi]
\setupbodyfont[postscript,ss,13pt]

\setupheadertexts[text][\_][]

\starttext
\dorecurse{10}{\input tufte \par}

\externalfigure[cow][scale=1424]

\externalfigure[cow][scale=1424]

\stoptext
--------------------------------------------------



Is the minimal test file I've come up with. Perhaps now it is easier
for Hans to track down the problem.  The error message is:

----------------------------------------
! Missing $ inserted.
<inserted text> 
                $
<to be read again> 
                   _
\_...fmmode \mathunderscore \else \textunderscore 
                                                  \fi 
<argument> \_
             {}{}{}
\firstoftwoarguments #1#2->#1
                             
\doattributes ...sname #1#2\@EA \endcsname \fi {#4
                                                  }\dostopattributes 
...
l.15 
     
--------------------------------------------------

btw: with the error related to other files in the directory: did you
run texutil --purgeall for testing?



Patrick
-- 
ConTeXt wiki: http://contextgarden.net
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Re: error with _ in header?

[Eros Albertazzi]

Patrick Gundlach wrote:

> minimum is far from 150 kb. And please avoid external figures if
> possible (there is cow.pdf hacker.jpg and mill.png for download, so
> we can all have the same figures to experiment with).

nice.. where are them?
Maybe it'd be nice to have them in tex/context/sample

Re: error with _ in header?

[Hans Hagen]

Eros Albertazzi wrote:

> Patrick Gundlach wrote:
>
>> minimum is far from 150 kb. And please avoid external figures if
>> possible (there is cow.pdf hacker.jpg and mill.png for download, so
>> we can all have the same figures to experiment with).
>
>
> nice.. where are them?
> Maybe it'd be nice to have them in tex/context/sample

http://www.pragma-ade.com/context/cont-img.zip


-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: error with _ in header?

[Stefan Wachter]

Hi Patrick,

first I want to say that I already spent several hours on that problem 
and was happy to reduce the file size to 5215 Bytes. Of course I could 
have done further but I thought that the file is now handy enough for 
debugging. (I do not know how TeX code is debugged and what tools are 
available for that task.)


 > btw: with the error related to other files in the directory: did you
 > run texutil --purgeall for testing?

Yes, I removed all temporary files. But the strange behaviour remains: 
when all images except that of the used external figure are removed then 
the error disappears.

--Stefan



Patrick Gundlach wrote:
> Hello Stefan,
> 
> 
>>I prunned the example to investigate the situation further. Now I have
>>only two pages. 
> 
> 
> Well, how do you think anybody should be able to debug what you have
> done with all the stuff in your document? 
> 
> 
>>>You should definitely try to reduce the file size to a minimum,
>>>otherwise it is hard to track the problem down.
> 
> 
> minimum is far from 150 kb. And please avoid external figures if
> possible (there is cow.pdf hacker.jpg and mill.png for download, so
> we can all have the same figures to experiment with).
> 
> Please do your homework yourself next time:
> 
> --------------------------------------------------
> \setupoutput[pdftex]
> 
> \usetypescript[adobekb][texnansi]
> \usetypescript[postscript][texnansi]
> \setupbodyfont[postscript,ss,13pt]
> 
> \setupheadertexts[text][\_][]
> 
> \starttext
> \dorecurse{10}{\input tufte \par}
> 
> \externalfigure[cow][scale=1424]
> 
> \externalfigure[cow][scale=1424]
> 
> \stoptext
> --------------------------------------------------
> 
> 
> 
> Is the minimal test file I've come up with. Perhaps now it is easier
> for Hans to track down the problem.  The error message is:
> 
> ----------------------------------------
> ! Missing $ inserted.
> <inserted text> 
>                 $
> <to be read again> 
>                    _
> \_...fmmode \mathunderscore \else \textunderscore 
>                                                   \fi 
> <argument> \_
>              {}{}{}
> \firstoftwoarguments #1#2->#1
>                              
> \doattributes ...sname #1#2\@EA \endcsname \fi {#4
>                                                   }\dostopattributes 
> ...
> l.15 
>      
> --------------------------------------------------
> 
> btw: with the error related to other files in the directory: did you
> run texutil --purgeall for testing?
> 
> 
> 
> Patrick

Re: error with _ in header?

[Patrick Gundlach]

Hi,

[...]

> (I do not know how TeX code is debugged and what tools are
> available for that task.)

There are no tools for problems like yours. So it is very important to
have a minimum (non-) working file file. 


>  > btw: with the error related to other files in the directory: did you
>  > run texutil --purgeall for testing?
>
> Yes, I removed all temporary files. But the strange behaviour remains:
> when all images except that of the used external figure are removed
> then the error disappears.

This is strange, I cannot reproduce the bug here. But let us wait to
see if Hans has anything to say about the error file.

Patrick
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Re: error with _ in header?

[Hans Hagen]

Patrick Gundlach wrote:

>--------------------------------------------------
>\setupoutput[pdftex]
>
>\usetypescript[adobekb][texnansi]
>\usetypescript[postscript][texnansi]
>\setupbodyfont[postscript,ss,13pt]
>
>\setupheadertexts[text][\_][]
>
>\starttext
>\dorecurse{10}{\input tufte \par}
>
>\externalfigure[cow][scale=1424]
>
>\externalfigure[cow][scale=1424]
>
>\stoptext
>--------------------------------------------------
>  
>
This file processes ok here; also, your bug is not so much related to headers but more to some kind of \_ expansion 

In what path are your graphics? 

Hans 

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: error with _ in header?

[Patrick Gundlach]

Hello,

>>--------------------------------------------------
>>\setupoutput[pdftex]
>>
>>\usetypescript[adobekb][texnansi]
>>\usetypescript[postscript][texnansi]
>>\setupbodyfont[postscript,ss,13pt]
>>
>>\setupheadertexts[text][\_][]
>>
>>\starttext
>>\dorecurse{10}{\input tufte \par}
>>
>>\externalfigure[cow][scale=1424]
>>
>>\externalfigure[cow][scale=1424]
>>
>>\stoptext
>>--------------------------------------------------
>>  
> This file processes ok here; also, your bug is not so much related to
> headers but more to some kind of \_ expansion In what path are your
> graphics? 

it breaks on 2004.8.14 as well on live.contextgarden.net

Graphics (cow.pdf) is in /opt/local/texmf/tex/context/sample

If the two graphics are not on the same page, the error dissapears.
The reproduction of the error is very sensitive to layout changes.



Patrick
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Re: Re: error with _ in header?

[Hans Hagen]

Patrick Gundlach wrote:

>Hello,
>
>  
>
>>>--------------------------------------------------
>>>\setupoutput[pdftex]
>>>
>>>\usetypescript[adobekb][texnansi]
>>>\usetypescript[postscript][texnansi]
>>>\setupbodyfont[postscript,ss,13pt]
>>>
>>>\setupheadertexts[text][\_][]
>>>
>>>\starttext
>>>\dorecurse{10}{\input tufte \par}
>>>
>>>\externalfigure[cow][scale=1424]
>>>
>>>\externalfigure[cow][scale=1424]
>>>
>>>\stoptext
>>>--------------------------------------------------
>>> 
>>>      
>>>
>>This file processes ok here; also, your bug is not so much related to
>>headers but more to some kind of \_ expansion In what path are your
>>graphics? 
>>    
>>
>
>it breaks on 2004.8.14 as well on live.contextgarden.net
>
>Graphics (cow.pdf) is in /opt/local/texmf/tex/context/sample
>
>If the two graphics are not on the same page, the error dissapears.
>The reproduction of the error is very sensitive to layout changes.
>  
>
the problem occurs in the output routine (when the page is built); some tracing all learns that while flushing the fig box takes place, the meaning of textunderscore is changed; so we need to restore this before hand; actually this problem should be solved differently, i.e. no redefinition at all; the problem is that findinf good solutions is not that easy because of "moments of expansion" 

fix (in core-fig.tex:)

\def\dodoplaceexternalfigure[#1][#2][#3][#4][#5][#6]%
  {\doifsomething{#3}% catches \defineexternalfigure dummies
     {\bgroup
\pushmacro\textunderscore
      \edef\textunderscore{\string_}% brrr, temp hack, still needed?
      \calculateexternalfigure[#1][#2][#3][#4][#5][#6]%
      \calculateexternalscreenfigure[#1][#2][#3][#4][#5][#6]%
\popmacro\textunderscore
      \box\foundexternalfigure
      \egroup}}



-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: error with _ in header?

[Patrick Gundlach]

Hello Hans,

[...]

> fix (in core-fig.tex:)

solves the problem here. 

Patrick
-- 
ConTeXt wiki: http://contextgarden.net
texshow-web:  http://texshow.contextgarden.net
List archive: http://archive.contextgarden.net

Re: error with _ in header?

[Stefan Wachter]

Hi Hans,

thanks for your fix. It solves the problem. Will this fix be included in 
future Context releases?

I am still confused why the content of the document directory had an 
impact on the output routine. (The problem disappeared after I had 
removed additional *.png files in the document directory. When I copied 
the superflous images into there again the problem reappeard.) I accept 
that computing in general and Context in special is kind of an empirical 
secret science. ;-)

Thanks again,
--Stefan

Re: Re: error with _ in header?

[Hans Hagen]

Stefan Wachter wrote:

> I am still confused why the content of the document directory had an 
> impact on the output routine. (The problem disappeared after I had 
> removed additional *.png files in the document directory. When I 
> copied the superflous images into there again the problem reappeard.) 
> I accept that computing in general and Context in special is kind of 
> an empirical secret science. ;-)

catcodes are -) 


-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: Re: error with _ in header?

[Hans Hagen]

Stefan Wachter wrote:

> thanks for your fix. It solves the problem. Will this fix be included 
> in future Context releases?

it's in my source file so ... 

Hans 

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: Re: Is there a bug during pagination of external figures?

[Hans Hagen]

Patrick Gundlach wrote:

>>>\setupheadertexts[margin][{\tfc bu}][\ifnum\pageno = 1\NamedExternalLink{../../../../bu/8/8_3_refkom/1/inhalt.pdf}{last}{\symbol[PfeilNachLinks]{} §}\else\PrevOrNextPage{/PrevPage}{\symbol[PfeilNachLinks]{} §}\fi\hskip.5em\ifnum\pageno = \lastpage{§ \symbol[PfeilNachRechts]}\else\PrevOrNextPage{/NextPage}{§ \symbol[PfeilNachRechts]}\fi]
>>>      
>>>
why not use 

\goto[PreviousPage]{\symbol[...]}
\goto[NextPage]{\symbol...]}

or 

\goto [forward]{\symbol[...]
\goto [backward]{...}

etc 

(firstpage, lastpage, nextpage, previouspage, etc) 

Hans 

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: Is there a bug during pagination of external figures?

[Stefan Wachter]

Hi Hans,

thanks for the tip,

--Stefan

> why not use
> \goto[PreviousPage]{\symbol[...]}
> \goto[NextPage]{\symbol...]}
> 
> or
> \goto [forward]{\symbol[...]
> \goto [backward]{...}
> 
> etc
> (firstpage, lastpage, nextpage, previouspage, etc)
> Hans

Re: Re: Is there a bug during pagination of external figures?

[Hans Hagen]

Stefan Wachter wrote:

a few tips:

- your \AllowHyphens ... \AllowHyphens can be replaced by |-| (vertical 
bars);

- 69\kern.1em\relax{}a Abs. 2 Nr. 6\blank[small]

no need for {} here, just \relax followed by a space is enough

-  alternative for calculating your width:

\def\determinecommalistwidth[#1]%
  {\scratchdimen\zeropoint
   \def\docommand##1%
     {\setbox\scratchbox\hbox{##1}%
      \ifdim\wd\scratchbox>\scratchdimen
        \scratchdimen\wd\scratchbox
      \fi}%
   \processcommalist[#1]\docommand}

\determinecommalistwidth[a),b),c)]

\the\scratchdimen

(or use \charwd cum suis)


Hans


-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

Re: Is there a bug during pagination of external figures?

[Stefan Wachter]

Hi Hans,

thanks for the additional hints. The width calculation method is very 
instructive. Yet, I think I can not use it, because I do not know in 
advance what kind of text is used as item labels. Maybe a label text 
contains already a comma. Is there another \processXXX-Makro for example 
\processampersandlist that can be used (because ampersands can not 
appear unescaped in normal text)?

--Stefan

PS: I found nowhere a description of \charwd

> 
> \def\determinecommalistwidth[#1]%
>  {\scratchdimen\zeropoint
>   \def\docommand##1%
>     {\setbox\scratchbox\hbox{##1}%
>      \ifdim\wd\scratchbox>\scratchdimen
>        \scratchdimen\wd\scratchbox
>      \fi}%
>   \processcommalist[#1]\docommand}
> 
> \determinecommalistwidth[a),b),c)]
> 
> \the\scratchdimen
> 
> (or use \charwd cum suis)

Re: Re: Is there a bug during pagination of external figures?

[Hans Hagen]

Stefan Wachter wrote:

> Hi Hans,
>
> thanks for the additional hints. The width calculation method is very 
> instructive. Yet, I think I can not use it, because I do not know in 
> advance what kind of text is used as item labels. Maybe a label text 
> contains already a comma. Is there another \processXXX-Makro for 
> example \processampersandlist that can be used (because ampersands can 
> not appear unescaped in normal text)?
>
> --Stefan
>
> PS: I found nowhere a description of \charwd
>
>>
>> \def\determinecommalistwidth[#1]%
>>  {\scratchdimen\zeropoint
>>   \def\docommand##1%
>>     {\setbox\scratchbox\hbox{##1}%
>>      \ifdim\wd\scratchbox>\scratchdimen
>>        \scratchdimen\wd\scratchbox
>>      \fi}%
>>   \processcommalist[#1]\docommand}
>>
>> \determinecommalistwidth[a),b),c)]
>>
>> \the\scratchdimen
>>
>> (or use \charwd cum suis)
>
\processseparatedlist may be of help

of course you can do: \determine...[{a},{b\&c},{d\_e},{f,g,h}]


Hans

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

metafun question

[Floris van Manen]

it seems that metafun has difficulty understanding the example using
the    vardef self@# expr p =   construct.


! Illegal parameter number in definition of \@MPG@dummy2.
<to be read again> 
                    
<argument> ... p of p enddef; \par vardef self@## 
                                                  expr p = cuta(@##,@##) @##...

\dostartuseMPgraphic ...leuseMPgraphic {#1}{#2}{#3
                                                  }}\elabelgroup 
l.41 \stopuseMPgraphic



why?


i copied the sample of the mp manual:



% interface=english output=pdftex

\starttext


\startuseMPgraphic{dummy2}

vardef cuta(suffix a,b) expr p =
drawarrow p cutbefore bpath.a cutafter bpath.b;
point .5*length p of p
enddef;

vardef self@# expr p =
cuta(@#,@#) @#.c{curl0}..@#.c+p..{curl0}@#.c 
enddef;

beginfig(52);
verbatimtex \def\stk#1#2{$\displaystyle{\matrix{#1\cr#2\cr}}$} etex
circleit.aa(btex\strut Start etex); aa.dx=aa.dy;
circleit.bb(btex \stk B{(a|b)^*a} etex);
circleit.cc(btex \stk C{b^*} etex);
circleit.dd(btex \stk D{(a|b)^*ab} etex);
circleit.ee(btex\strut Stop etex); ee.dx=ee.dy;
numeric hsep;
bb.c-aa.c = dd.c-bb.c = ee.c-dd.c = (hsep,0);
cc.c-bb.c = (0,.8hsep);
xpart(ee.e - aa.w) = 3.8in;
drawboxed(aa,bb,cc,dd,ee);
label.ulft(btex$b$etex, cuta(aa,cc) aa.c{dir50}..cc.c);
label.top(btex$b$etex, self.cc(0,30pt));
label.rt(btex$a$etex, cuta(cc,bb) cc.c..bb.c);
label.top(btex$a$etex, cuta(aa,bb) aa.c..bb.c);
label.llft(btex$a$etex, self.bb(-20pt,-35pt));
label.top(btex$b$etex, cuta(bb,dd) bb.c..dd.c);
label.top(btex$b$etex, cuta(dd,ee) dd.c..ee.c);
label.lrt(btex$a$etex, cuta(dd,bb) dd.c..{dir140}bb.c);
label.bot(btex$a$etex, cuta(ee,bb) ee.c..tension1.3 ..{dir115}bb.c);
label.urt(btex$b$etex, cuta(ee,cc) ee.c{(cc.c-ee.c)rotated-15}..cc.c);
endfig;

\stopuseMPgraphic

\useMPgraphic{dummy2}

\stoptext






//floris

Re: metafun question

[Hans Hagen]

Floris van Manen wrote:

>it seems that metafun has difficulty understanding the example using
>  
>
no, it's tex playing tricks (# is kin dof special to tex)

>the    vardef self@# expr p =   construct.
>
>  
>
use \# instead

Hans

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------

metafun question getting XY

[Floris van Manen]

if i define a path

q := (w0,w0)--(w0,ww0)--(w2,ww1)--(w3,ww2)--(w3,w0)--cycle ;

and then pass this path as a parameter to a function

test( q ) ;


then within that function i can step through the 'list of points'.

def test( expr a  ) =
 for i = 1 upto (length(a)-2):
  dotlabel.bot ("" , (point i of a)  );
 endfor ;
enddef;


but how could i extract from each point the X and the Y value to
construct the lines like this.

 for i = 1 upto (length(a)-2):
  z1 = (point i of a) ;
  draw (0,y1)--(100,y1) ;
 endfor;



thanks!
% floris

Re: metafun question getting XY

[Hans Hagen]

Floris van Manen wrote:

>if i define a path
>
>q := (w0,w0)--(w0,ww0)--(w2,ww1)--(w3,ww2)--(w3,w0)--cycle ;
>
>and then pass this path as a parameter to a function
>
>test( q ) ;
>
>
>then within that function i can step through the 'list of points'.
>
>def test( expr a  ) =
> for i = 1 upto (length(a)-2):
>  dotlabel.bot ("" , (point i of a)  );
> endfor ;
>enddef;
>
>
>but how could i extract from each point the X and the Y value to
>construct the lines like this.
>
> for i = 1 upto (length(a)-2):
>  z1 = (point i of a) ;
>  draw (0,y1)--(100,y1) ;
> endfor;
>
>  
>
xpart point i of a ; 
ypart point i of a ; 

Hans 

-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------