XML-lookahead

XML-lookahead

[Sjoerd Siebinga]

Hi all,

Is it possible to use something like \doifnextcharelse for xml- 
environments or is there a clever work-around? I need to know what  
the next tag is in order to decide if a linebreak needs to be inserted.

For example:

\defineXMLenvironment [av] {} {} % linebreak unless followed by  
<liste>-tag
\defineXMLenvironment [liste] {} {\crlf} % always a linebreak


\startXMLdata

<av> text </av> <liste> 15 </liste>  <!-- \crlf -->


<av> text </av>  <!-- \crlf -->

\stopXMLdata




Regards,

Sjoerd

Re: XML-lookahead

[Hans Hagen]

Sjoerd Siebinga wrote:
> Hi all,
>
> Is it possible to use something like \doifnextcharelse for xml- 
> environments or is there a clever work-around? I need to know what  
> the next tag is in order to decide if a linebreak needs to be inserted.
>   
there is a way to build a stack and look onto it but that's of no use here
> For example:
>
> \defineXMLenvironment [av] {} {} % linebreak unless followed by  
> <liste>-tag
> \defineXMLenvironment [liste] {} {\crlf} % always a linebreak
>
>
> \startXMLdata
>
> <av> text </av> <liste> 15 </liste>  <!-- \crlf -->
>
>
> <av> text </av>  <!-- \crlf -->
>
> \stopXMLdata
>   
maybe look back: 

\disablemode[xml:linebreak]

\startsetups[xml:linebreak]
  \doifmode{xml:linebreak}{\disablemode[xml:linebreak]\crlf}  
\stopsetups 

\defineXMLenvironment [av] {} {\ensablemode[xml:linebreak]}

\defineXMLenvironment [liste] {\setups[xml:linebreak]} {\crlf}

or sometign similar,  



-----------------------------------------------------------------
                                          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: XML-lookahead

[Sjoerd Siebinga]

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Thanks Hans, for the fast response.
On 27-aug-2006, at 14:56, Hans Hagen wrote:

> \disablemode[xml:linebreak]
>
> \startsetups[xml:linebreak]
>   \doifmode{xml:linebreak}{\disablemode[xml:linebreak]\crlf}
> \stopsetups
>
> \defineXMLenvironment [av] {} {\ensablemode[xml:linebreak]}
>
> \defineXMLenvironment [liste] {\setups[xml:linebreak]} {\crlf}
>
> or sometign similar,

I have played around with this solution for a bit and  
\defineXMLenvironment [liste] {} {\setups[xml:linebreak]}
  seems to work for the <liste>-tag. But it not entirely clear to me  
how this should work for the <av>-tag when it is not followed by  
another tag on the same line.

Sjoerd 

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Re: XML-lookahead

[Hans Hagen]

Sjoerd Siebinga wrote:
> Thanks Hans, for the fast response.
> On 27-aug-2006, at 14:56, Hans Hagen wrote:
>
>> \disablemode[xml:linebreak]
>>
>>
>> \startsetups[xml:linebreak]
>>
>> � \doifmode{xml:linebreak}{\disablemode[xml:linebreak]\crlf} �
>>
>> \stopsetups�
>>
>>
>> \defineXMLenvironment [av] {} {\ensablemode[xml:linebreak]}
>>
>>
>> \defineXMLenvironment [liste] {\setups[xml:linebreak]} {\crlf}
>>
>>
>> or sometign similar, �
>>
>
> I have played around with this solution for a bit 
> and�\defineXMLenvironment [liste] {} {\setups[xml:linebreak]}
> �seems to work for the <liste>-tag. But it not entirely clear to me 
> how this should work for the <av>-tag when it is not followed by 
> another tag on the same line.�
\def\dowithnextXMLelement#1%
  {\pushmacro\executeXMLelement
   \def\executeXMLelement{#1\popmacro\executeXMLelement}}

\defineXMLenvironment[aap]
  {}
  {\dowithnextXMLelement
     {\doifelse{\currentXMLelement}{noot}
        { lust }
        { kust }}}

\starttext

\startXMLdata
    <aap>een aap</aap><noot>een noot</noot>
    <aap>een aap</aap><mies>een mies</mies>
\stopXMLdata

\stoptext

this assumes that i keep \executeXMLelement in its current location which is quite certain


-----------------------------------------------------------------
                                          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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