region-before not displayed

[Valentina Benedetti <Vb...@brainpower.ch>]

Hi,

Can someone explain me why the simple xsl-fo code below produces a pdf
without header?
And moreover, why increasing region-before "extent" attribute to 5.1mm, the
header innocently appears.
After several attempts I noticed that font-size and line-height could be
involved.
Is there a reason for this behavior?

<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
	<fo:layout-master-set>
		<fo:simple-page-master master-name="page" page-height="297mm"
page-width="210mm">
			<fo:region-body region-name="xsl-region-body" margin-top="10mm"/>
			<fo:region-before extent="5mm"/>
		</fo:simple-page-master>
	</fo:layout-master-set>
	<fo:page-sequence master-reference="page">
		<fo:static-content flow-name="xsl-region-before">
			<fo:block>header</fo:block>
		</fo:static-content>
		<fo:flow flow-name="xsl-region-body">
			<fo:block>body</fo:block>
		</fo:flow>
	</fo:page-sequence>
</fo:root>

Regards
Valentina Benedetti

PS: I'm using FOP 0.20.4.



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Re: region-before not displayed

["J.Pietschmann" <j3...@yahoo.de>]

Valentina Benedetti wrote:
> without header?
> And moreover, why increasing region-before "extent" attribute to 5.1mm, the
> header innocently appears.

The default font size is 12pt or ~4.23mm. FOP allocates additional
~20% space above and below the glyph marks, for a total of 5.08mm.
This means the text wont fit into a region 5mm high, but will be
displayed in a region which is 5.1 mm high.

J.Pietschmann

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