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

From: Werner Donné (werner.donne@re.be)
Date: Sat Feb 08 2003 - 11:44:12 PST

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    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@re.be
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