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Re: conditional page break

From: Tony Graham <Tony.Graham@MenteithConsulting.com>
Date: Thu, 22 Oct 2009 22:34:22 +0100
To: www-xsl-fo@w3.org
Message-ID: <87ljj3w1sx.fsf@takai.menteithconsulting.com>
On Thu, Oct 22 2009 15:07:13 +0100, John.Virgo@xerox.com wrote:
> Could you provide a little more detail around the flow-map?

The flow map directs flows to regions.

In XSL 1.1, you can have more than one fo:region-body within a
fo:simple-page-master, and each xsl:region-body has to have a different
"region-name" and may have different positions on the page.

See http://www.w3.org/TR/xsl11/#d0e7194 for flow-map examples.

Unfortunately, I couldn't solve Tamsin's problem using flow-maps after
all: the best that I could do on the second page was to put A and B in
different regions, so it couldn't look like B directly followed A when A
overflowed onto the second page.

However, if A is always going to be large enough, and B is never going
to be small enough, that all of A and all of B can fit on one page, then
you can put B in a fo:block-container, specify a mimimum
block-progression-dimension, and set overflow to "repeat".  If the
minimum is larger than the maximum BPD that A will leave on the first
page, then B will always start on the second page, but if B overflows
that page, it will just generate more areas on the third page.  The
issue then becomes whether A will always leave enough room on the second
page for B's minimum BPD, otherwise B would start on the third page
instead of on the second page after the end of the large A.

------------------------------------------------------------
<?xml version="1.0" encoding="utf-8"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:xlink="http://www.w3.org/1999/xlink">
  <fo:layout-master-set>
    <fo:simple-page-master page-height="297mm" page-width="210mm" margin-right="0.75in" margin-left="0.2in" margin-bottom="0.0in" margin-top="0.375in" master-name="a">
      <fo:region-body margin-bottom="0.9in" margin-top="0.6in" region-name="xsl-region-body"/>
    </fo:simple-page-master>
    <fo:page-sequence-master master-name="master">
      <fo:repeatable-page-master-reference  master-reference="a"/>
    </fo:page-sequence-master>
  </fo:layout-master-set>
    <fo:page-sequence master-reference="master">
      <fo:flow flow-name="xsl-region-body" font-size="72pt">
        <fo:block>A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A</fo:block>
        <fo:block-container overflow="repeat" block-progression-dimension.minimum="200mm"><fo:block>B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B</fo:block></fo:block-container>
      </fo:flow>
    </fo:page-sequence>
    <fo:page-sequence master-reference="master">
      <fo:flow flow-name="xsl-region-body" font-size="72pt">
        <fo:block>A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A</fo:block>
        <fo:block-container overflow="repeat" block-progression-dimension.minimum="200mm"><fo:block>B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B</fo:block></fo:block-container>
      </fo:flow>
    </fo:page-sequence>
</fo:root>
------------------------------------------------------------

Regards,


Tony Graham                         Tony.Graham@MenteithConsulting.com
Director                                  W3C XSL FO SG Invited Expert
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Received on Thursday, 22 October 2009 21:34:58 GMT

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