TeX-MP interaction in mkii and mkiv

TeX-MP interaction in mkii and mkiv

[Aditya Mahajan]

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Hi,

I cannot understand why mkii and mkiv give different output in the 
attached example modified from Thomas's presentation module. The output 
of MKII is correct. In MKIV, the first picture (Left) is not correct, and 
I cannot understand why is this the case.

I am using the latest minimals and the latest svn luatex.

Thanks,
Aditya

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\setupcolors[state=start]

\beginOLDTEX
\loadmapfile[qhv-ec.map]

\definefontsynonym  [BigNumberFont] [ec-qhvb] 
\endOLDTEX

\beginLUATEX
\definefontsynonym  [BigNumberFont] [name:texgyreherosbold]
\endLUATEX

\definefont         [NumberFont]    [BigNumberFont at 30pt]

\definetextext[taspresent:sometxt:left] {\TaspresentSometxtLeft}
\definetextext[taspresent:sometxt:right]{\TaspresentSometxtRight}

\unexpanded\def\TaspresentSometxtLeft#1%
  {\getvalue{taspresent:framed:small}
                       {\color[orange]
                       {\NumberFont #1}}}

\unexpanded\def\TaspresentSometxtRight#1%
  {\getvalue{taspresent:framed:small}
                       {\color[blue]
                       {\NumberFont #1}}}

\startuseMPgraphic{test}
StartPage ;
picture Left, Right ;

Left  := \sometxt[taspresent:sometxt:left] {\folio} ysized 6cm; 
Right := \sometxt[taspresent:sometxt:right]{\folio} ysized 6cm; 

clip Left  to boundingbox Left  xyscaled(0,3cm) ;

if PageNumber < 10:
	clip Right to boundingbox Right xyscaled(0,3cm) shifted (bbwidth(Right)/2,0) ;
	draw Left  shifted (14.26cm,-.5cm) ;
	draw Right shifted (14.26cm,-.5cm) ;
else :
	clip Right to boundingbox Right xyscaled(0,3cm) shifted (bbwidth(Right)/1.5,0) ;
	draw Left  shifted (12.59cm,-.5cm) ; 
	draw Right shifted (12.59cm,-.5cm) ;
fi;
StopPage ;
\stopuseMPgraphic

\defineoverlay[test][\useMPgraphic{test}]

\setupbackgrounds[page]
                 [background=test]

\starttext

\dorecurse{10}{
\chapter{test}
\input knuth}

\stoptext



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Re: TeX-MP interaction in mkii and mkiv

[Aditya Mahajan]

On Thu, 2 Oct 2008, Aditya Mahajan wrote:

> Hi,
>
> I cannot understand why mkii and mkiv give different output in the attached 
> example modified from Thomas's presentation module. The output of MKII is 
> correct. In MKIV, the first picture (Left) is not correct, and I cannot 
> understand why is this the case.
>
> I am using the latest minimals and the latest svn luatex.

MKIV is very strict about the spaces. I had

Left  := \sometxt[taspresent:sometxt:left] {\folio} ysized 6cm;
Right := \sometxt[taspresent:sometxt:right]{\folio} ysized 6cm;

(notice the space before \folio in Left). MKIV does not like that. If I 
remove the space, everything is fine.

Aditya
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Re: TeX-MP interaction in mkii and mkiv

[Taco Hoekwater]

Aditya Mahajan wrote:
> On Thu, 2 Oct 2008, Aditya Mahajan wrote:
> 
>> Hi,
>>
>> I cannot understand why mkii and mkiv give different output in the attached 
>> example modified from Thomas's presentation module. The output of MKII is 
>> correct. In MKIV, the first picture (Left) is not correct, and I cannot 
>> understand why is this the case.
>>
>> I am using the latest minimals and the latest svn luatex.
> 
> MKIV is very strict about the spaces. I had
> 
> Left  := \sometxt[taspresent:sometxt:left] {\folio} ysized 6cm;
> Right := \sometxt[taspresent:sometxt:right]{\folio} ysized 6cm;
> 
> (notice the space before \folio in Left). MKIV does not like that. If I 
> remove the space, everything is fine.

... I had just figured that out myself. :-(

It seems we can fix that by redefining the definition of \sometxt.


Best wishes,
Taco

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Re: TeX-MP interaction in mkii and mkiv

[Taco Hoekwater]

Taco Hoekwater wrote:
>>
>> (notice the space before \folio in Left). MKIV does not like that. If I 
>> remove the space, everything is fine.
> 
> ... I had just figured that out myself. :-(
> 
> It seems we can fix that by redefining the definition of \sometxt.

Sorry, make that \definetextext. The macro \sometxt has to be
expandable, which limits the amount of tricks we can do with it.

This patch works:

   \def\definetextext[#1]#2%
     {\setvalue{@@st@@[#1]}{#2}%
      \setvalue{@@st@@[#1] }{#2}% added
     }

Best wishes,
Taco
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Re: TeX-MP interaction in mkii and mkiv

[Aditya Mahajan]

On Thu, 2 Oct 2008, Taco Hoekwater wrote:

>
>
> Taco Hoekwater wrote:
>>>
>>> (notice the space before \folio in Left). MKIV does not like that. If I
>>> remove the space, everything is fine.
>>
>> ... I had just figured that out myself. :-(

Ha, I can now claim that I figured out one TeX problem faster than 
you :-) Of course, you also figured out a solution :-D

>> It seems we can fix that by redefining the definition of \sometxt.
>
> Sorry, make that \definetextext. The macro \sometxt has to be
> expandable, which limits the amount of tricks we can do with it.
>
> This patch works:
>
>   \def\definetextext[#1]#2%
>     {\setvalue{@@st@@[#1]}{#2}%
>      \setvalue{@@st@@[#1] }{#2}% added
>     }

Thanks, works perfectly.

Aditya
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Re: TeX-MP interaction in mkii and mkiv

[Aditya Mahajan]

Hi,

Another difference in mkii and mkiv handling of sometxt. If there is a 
line break in \sometxt{ ... } then it fails in mkii, but runs in mkiv. For 
example,

\starttext

\startMPcode

   draw \sometxt{A very
                long string} ;

\stopMPcode

\stoptext

I vaguely understand why this is happening, but I do not know if it can be 
corrected.

Aditya
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Re: TeX-MP interaction in mkii and mkiv

[Hans Hagen]

Aditya Mahajan wrote:
> Hi,
> 
> Another difference in mkii and mkiv handling of sometxt. If there is a 
> line break in \sometxt{ ... } then it fails in mkii, but runs in mkiv. For 
> example,
> 
> \starttext
> 
> \startMPcode
> 
>    draw \sometxt{A very
>                 long string} ;
> 
> \stopMPcode
> 
> \stoptext
> 
> I vaguely understand why this is happening, but I do not know if it can be 
> corrected.

in mkii we obey lines because it gives better tracing etc etc given that 
we use external files; this will work:


    draw \sometxt{A very %
                 long string} ;


indeed mkiv is different but let's consider it an improvement; i don't 
want to waste time on mkii fixes that are not that important

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___________________________________________________________________________________

Re: TeX-MP interaction in mkii and mkiv

[Aditya Mahajan]

On Fri, 10 Oct 2008, Hans Hagen wrote:

> Aditya Mahajan wrote:
>> Hi,
>>
>> Another difference in mkii and mkiv handling of sometxt. If there is a
>> line break in \sometxt{ ... } then it fails in mkii, but runs in mkiv. For
>> example,
>>
>> \starttext
>>
>> \startMPcode
>>
>>    draw \sometxt{A very
>>                 long string} ;
>>
>> \stopMPcode
>>
>> \stoptext
>>
>> I vaguely understand why this is happening, but I do not know if it can be
>> corrected.
>
> in mkii we obey lines because it gives better tracing etc etc given that
> we use external files; this will work:
>
>
>    draw \sometxt{A very %
>                 long string} ;
>

Ah, thanks.

> indeed mkiv is different but let's consider it an improvement; i don't
> want to waste time on mkii fixes that are not that important

I understand that. We need to document all these differences between mkii 
and mkiv with regards to mp interaction for those who want to write code 
that works in both. Mojca, any plans to update your MyWay?

Aditya
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___________________________________________________________________________________

Re: TeX-MP interaction in mkii and mkiv

[Mojca Miklavec]

On Fri, Oct 10, 2008 at 7:24 PM, Aditya Mahajan wrote:
> On Fri, 10 Oct 2008, Hans Hagen wrote:
>
>> Aditya Mahajan wrote:
>>> Hi,
>>>
>>> Another difference in mkii and mkiv handling of sometxt. If there is a
>>> line break in \sometxt{ ... } then it fails in mkii, but runs in mkiv. For
>>> example,
>>>
>>> \starttext
>>>
>>> \startMPcode
>>>
>>>    draw \sometxt{A very
>>>                 long string} ;
>>>
>>> \stopMPcode
>>>
>>> \stoptext
>>>
>>> I vaguely understand why this is happening, but I do not know if it can be
>>> corrected.
>>
>> in mkii we obey lines because it gives better tracing etc etc given that
>> we use external files; this will work:
>>
>>
>>    draw \sometxt{A very %
>>                 long string} ;
>>
>
> Ah, thanks.
>
>> indeed mkiv is different but let's consider it an improvement; i don't
>> want to waste time on mkii fixes that are not that important
>
> I understand that. We need to document all these differences between mkii
> and mkiv with regards to mp interaction for those who want to write code
> that works in both. Mojca, any plans to update your MyWay?

If you want to do changes, just go ahead (you might be more
competitive to describe them).

Otherwise: I'm not sure what all the differences are.
1.) withcolor doesn't work
2.) \startTeXtexsts cannot be used
3.) the example above fails in mkii

What else?

Mojca
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___________________________________________________________________________________

Re: TeX-MP interaction in mkii and mkiv

[Aditya Mahajan]

On Mon, 13 Oct 2008, Mojca Miklavec wrote:

> On Fri, Oct 10, 2008 at 7:24 PM, Aditya Mahajan wrote:
>> On Fri, 10 Oct 2008, Hans Hagen wrote:
>>
>>> Aditya Mahajan wrote:
>>>> Hi,
>>>>
>>>> Another difference in mkii and mkiv handling of sometxt. If there is a
>>>> line break in \sometxt{ ... } then it fails in mkii, but runs in mkiv. For
>>>> example,
>>>>
>>>> \starttext
>>>>
>>>> \startMPcode
>>>>
>>>>    draw \sometxt{A very
>>>>                 long string} ;
>>>>
>>>> \stopMPcode
>>>>
>>>> \stoptext
>>>>
>>>> I vaguely understand why this is happening, but I do not know if it can be
>>>> corrected.
>>>
>>> in mkii we obey lines because it gives better tracing etc etc given that
>>> we use external files; this will work:
>>>
>>>
>>>    draw \sometxt{A very %
>>>                 long string} ;
>>>
>>
>> Ah, thanks.
>>
>>> indeed mkiv is different but let's consider it an improvement; i don't
>>> want to waste time on mkii fixes that are not that important
>>
>> I understand that. We need to document all these differences between mkii
>> and mkiv with regards to mp interaction for those who want to write code
>> that works in both. Mojca, any plans to update your MyWay?
>
> If you want to do changes, just go ahead (you might be more
> competitive to describe them).
>
> Otherwise: I'm not sure what all the differences are.
> 1.) withcolor doesn't work
> 2.) \startTeXtexsts cannot be used
> 3.) the example above fails in mkii

In MKIV certain commands inside \sometxt should be unexpandable. I do not 
really understand which ones, but I occasionally get errors which can be 
fixed by making the command unexpandable.

Aditya
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