[NTG-context] issue when the encapsulation ‘startitem stopitem’ command is in another self-defined command

[NTG-context] issue when the encapsulation ‘startitem stopitem’ command is in another self-defined command

[autumnus]

hi,

I'm creating a command that can format multiple choice questions on my own. 
I've done most of it at the moment. 
But I want more, so I'm trying to create more versions of this command 
that is already nearing completion. 
So I'm using the following command to create a command with more possibilities.

I've noticed that ‘startitem stopitem’ isn't working. 
Their location and serial number are anomalous.

%%%% Removed some unnecessary commands to show what the problem was.
% macros=mkvi
\starttext
\unprotect
\installnamespace          {chitem}
\installcommandhandler \????chitem     {chitem}     \????chitem

\appendtoks
 \setuevalue{\e!start\currentchitem}{\startnamedchitem [\currentchitem]}%
 \setuevalue{\e!stop \currentchitem}{\stopnamedchitem}%
\to \everydefinechitem

\tolerant\protected\def\markedchoice#1{{\sym{@} \red sym : #1}}
\tolerant\protected\def\normalchoice#1{\startitem normal : #1\stopitem}
\tolerant\protected\def\\calc_maxwidth#1{}
%The longest option text is calculated by comparison to
%  determine the number of columns that can be typeset

\tolerant\protected\def\startnamedchitem[#chitem]#*[#mark]#*[#option]#*#choice\stopnamedchitem%
 {\begingroup
%  \ifarguments 0\or :1\or +2\or =3\or !4\fi
  \def\currentchitem{#chitem}%
  \edef\p_correctmark{*}\edef\p_paramark{#mark}%
  \calc_maxwidth{#choice}%
  \ifx\p_paramark\p_correctmark
      \markedchoice{#choice}%
  \else
      \normalchoice{#choice}%
  \fi\endgroup}
  
\def\stopnamedchitem{}
\definechitem[chitem]
\protect

\startitemize[n,horizontal,two]% 
% The process of calculating the number of formattable columns 
% has been removed and the results of the calculations are used directly.
\startchitem xxx\stopchitem
\startchitem[*]correct choice\stopchitem
\startchitem xxx\stopchitem
\startchitem xxx\stopchitem
\stopitemize

\stoptext
%%%%%

thanks for any help,
autumnus
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________

[NTG-context] Re: issue when the encapsulation ‘startitem stopitem’ command is in another self-defined command

[Wolfgang Schuster]

autumnus  schrieb am 28.12.2024 um 13:34:
> hi,
> 
> I'm creating a command that can format multiple choice questions on my own.
> I've done most of it at the moment.
> But I want more, so I'm trying to create more versions of this command
> that is already nearing completion.
> So I'm using the following command to create a command with more possibilities.
> 
> I've noticed that ‘startitem stopitem’ isn't working.


You can't put the items in a group.


\starttext

before

\startitemize[n,horizontal,two]
\begingroup\startitem aaa\stopitem\endgroup
\begingroup\startitem bbb\stopitem\endgroup
\stopitemize

after

\stoptext


> Their location and serial number are anomalous.
> 
> %%%% Removed some unnecessary commands to show what the problem was.
> % macros=mkvi
> \starttext
> \unprotect
> \installnamespace          {chitem}
> \installcommandhandler \????chitem     {chitem}     \????chitem
> 
> \appendtoks
>   \setuevalue{\e!start\currentchitem}{\startnamedchitem [\currentchitem]}%
>   \setuevalue{\e!stop \currentchitem}{\stopnamedchitem}%
> \to \everydefinechitem
> 
> \tolerant\protected\def\markedchoice#1{{\sym{@} \red sym : #1}}
> \tolerant\protected\def\normalchoice#1{\startitem normal : #1\stopitem}
> \tolerant\protected\def\\calc_maxwidth#1{}
> %The longest option text is calculated by comparison to
> %  determine the number of columns that can be typeset
> 
> \tolerant\protected\def\startnamedchitem[#chitem]#*[#mark]#*[#option]#*#choice\stopnamedchitem%

You can't use \stopnamedchitem as delimiter for the environment,
what TeX has to see is the new \stopchitem command.

One method to achieve this is \grabuntil with a processing function.

\tolerant\protected\def\startnamedchitem[#1]#*[#2]#*[#3]%
   {\begingroup
    \edef\currentchitem{#1}%
    \edef\m_mark{#2}%
    \grabuntil{\e!stop\currentchitem}\process_chitem}

\def\process_chitem#1%
   {\ifx\m_mark\wildcardsymbol
      \aftergroup\markedchoice
    \else
      \aftergroup\normalchoice
    \fi
    \endgroup{#1}}

Wolfgang
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________

[NTG-context] Re: issue when the encapsulation ‘startitem stopitem’ command is in another self-defined command

[autumnus]

Thanks for the solution.

autumnus.
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________

[NTG-context] Re: issue when the encapsulation ‘startitem stopitem’ command is in another self-defined command

[autumnus]

hi, Wolfgang

Sorry, but after I tested it, it did output all the lists and their ordinal numbers. 
However, if I used the horizontal parameter, it didn't go the way I expected.

The expected output  
          item 1   sym @
          item 3  item 4

But the actual output is:
          sym @
          item 1   item 3  
          item 4

But if I remove the horizontal argument, 
the list is laid out in the normal order:
        item 1
        sym @
        item 3
        item 4

What should I do with it?

thanks,
autumnus
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________

[NTG-context] Re: issue when the encapsulation ‘startitem stopitem’ command is in another self-defined command

[Wolfgang Schuster]

autumnus schrieb am 28.12.2024 um 15:44:
> hi, Wolfgang
>
> Sorry, but after I tested it, it did output all the lists and their ordinal numbers.
> However, if I used the horizontal parameter, it didn't go the way I expected.
>
> The expected output
>            item 1   sym @
>            item 3  item 4
>
> But the actual output is:
>            sym @
>            item 1   item 3
>            item 4
>
> But if I remove the horizontal argument,
> the list is laid out in the normal order:
>          item 1
>          sym @
>          item 3
>          item 4
>
> What should I do with it?

When you use the "horizontal" or "random" option Context collects all 
item entries enclosed
in a \startitem / \stopitem pair and flushes the collection at the end 
of the itemize environment.

All normal entries which don't use them item-pair are placed as is 
before the collected entries.

While there is a \startspecialitem / \stopspecialitem pair with a \sym 
option, the entries aren't
collected at the moment.

Wolfgang

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________