Re: [docbook-apps] dbfo-need changes para spacing

[Bob Stayton <bobs@sagehill.net>]

Hi Mario,
The problem with extra vertical space with dbfo-need is with FOP.  This 
previous message provides more information:

https://lists.oasis-open.org/archives/docbook-apps/201007/msg00235.html

Bob Stayton
Sagehill Enterprises
bobs@sagehill.net

On 3/26/2014 2:53 PM, Mario Klebsch wrote:
> Hello,
>
> I am new on this list, so please forgive me, if this is a FAQ.
>
> I want to use conditional page breaks, but they seem to change para spacing.
>
> A sample docbook source looks like this:
>
> <?xml version="1.0" encoding="utf-8"?>
> <!DOCTYPE book>
> <book version="5.0" xml:lang="de" xmlns="http://docbook.org/ns/docbook";>
> 	<chapter>
> 		<title>Chapter</title>
> 		<para>Para1</para>
> 		<para>Para2</para>
> 		<para>Para3</para>
> 		<para>Para4</para>
> 		<?dbfo-need height="10cm"?>
> 		<para>Para5</para>
> 		<?dbfo-need height="10cm"?>
> 		<para>Para6</para>
> 		<para>Para7</para>		
> 	</chapter>
> </book>
>
> When I transform this document source with docbook-xsl-ns-1.78.1/fo/docbook.xsl and FOP Version 1.1 to pdf, the para spacing between Para4/Para5 and between Para5/Para6 is increased. I need to add  space-before="0mm" to dbfo-need to make the soft page breaks invisible, when the do not cause a page break.
>
> Is this intentional or is there a mistake in my document, that I do not see.
>
> I looked into pi.xsl and there seems to be a lot of code to determine correct spacing, if space-before is missing, but I am not that fluent in xslt and docbook, to completely understand that part.
>
>
> 73, Mario