[xep-support] Restriction in item 2 of section 1.4 of XEP spec

[Werner Donné]

Thank you Nikolai. That is an option. In that case I will have to check how to
spread the properties over the fo:table and inner fo:block elements.

Werner.

Nikolai Grigoriev wrote:
> Hi Werner,
> 
> 
>>At the moment I see no other way to center a block with an explicit 
>>width and which is stacked in another block then to generate 
>>expressions such as:
>>   margin-left="50% - <width> div 2 - <padding-left>"
> 
> 
> As a workaround, you can use a borderless table:
> 
> <fo:table table-layout="fixed" table-width="100%">
>   <fo:table-column column-width="proportional-column-width(1)"/>
>   <fo:table-column column-width="...put...your...width...here..."/>
>   <fo:table-column column-width="proportional-column-width(1)"/>
>   <fo:table-body>
>     <fo:table-cell column-number="2">
>       <fo:block>Your content here</fo:block>
>     </fo:table-cell>
>   </fo:table-body>
> </fo:table>  
> 
> This is 100% compliant FO.
> 
> 
>>Therefore, I wonder when the afore-mentioned restriction on expressions 
>>will be lifted.
> 
> 
> Not very soon. As you probably guessed, the current state of expressions
> comprises all those that can be calculated _on the source tree_. To extend
> expressions further, one should postpone their computation until the width 
> of the containing area is known. This is hard to combine with acceptable
> performance.
> 
> Regards,
> Nikolai Grigoriev
> RenderX
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-- 
Werner Donné  --  Re BVBA
Engelbeekstraat 8
B-3300 Tienen
tel: (+32) 486 425803	e-mail: werner.donne at re.be

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