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Subject: Re: [docbook-apps] Costomizing fo stylesheet?


----- Original Message -----
From: "Řyvind Hvamstad" <oyvind@hvamstad.net>
To: <docbook-apps@lists.oasis-open.org>
Sent: Sunday, July 13, 2003 4:14 AM
Subject: [docbook-apps] Costomizing fo stylesheet?


> Hi, I'm trying to customize the chapter of a book and also make the
> section titles indent to the same position as the text. I want the
> chapter layout to look something like this:
> ___________________________________
> |                                  |
> |                        Chapter 7 |
> |__________________________________|
> |                   Chapter title  |
> |__________________________________|
> |                                  |
> |  Section 1                       |
> |  text in the section             |
> |  ..................              |
> |__________________________________|
>
> I started reading the stylesheets that come with the distribution on
> debian, but I find that the flow is hard to follow. Could anyone give me
> a clue about what templates to override, and also how I can align the
> section titles with the section text?


The chapter titles are handled by the titlepage mechanism and some
attribute-sets.
The following attribute set customization will center everything on the
chapter
"titlepage", which is just the top of the chapter's first page.  If you had
a
chapter author, for example, it would be centered as well.

<xsl:attribute-set name="chapter.titlepage.recto.style">
  <xsl:attribute name="text-align">center</xsl:attribute>
</xsl:attribute-set>

But the default chapter title style is "Chapter 7. Chapter title" on one
line.
You want separate blocks. For that, you will need to customize
a template.  If you check the titlepage specifications that are
declared in fo/titlepage.templates.xml, you will see that the chapter
title is handled by a named template:

  <t:titlepage t:element="chapter" t:wrapper="fo:block"
               font-family="{$title.font.family}">
    <t:titlepage-content t:side="recto" margin-left="{$title.margin.left}">
      <title t:named-template="component.title"

You could customize the 'component.title' template, found in
fo/component.xsl. It is used for chapters, appendixes, preface,
etc, so you need to make it conditional for only chapters, or
create a new custom template just for chapters and change
the spec file (and regenerate the titlepage stylesheet file from it).

The customization would be inside the existing fo:block, creating
two new blocks.  Start an fo:block,
call the 'gentext' template (found in common/l10n.xsl) to generate the
word "Chapter", apply-templates on the context element
in 'label.markup' mode to generate the number, close the fo:block
and start a new one, then apply-templates in 'title.markup' mode
to generate the title.  This is roughly it:

<fo:block>
      <xsl:call-template name="gentext" >
        <xsl:with-param name="key" select="'Chapter'"/>
      </xsl:call-template>
      <xsl:text> </xsl:text>
      <xsl:apply-templates select="$node" mode="label.markup"/>
 </fo:block>
 <fo:block>
      <xsl:apply-templates select="$node" mode="title.markup"/>
 </fo:block>


The section title indent is controlled by setting this parameter:

<xsl:param name="title.margin.left">0</xsl:param>


Bob Stayton
Sagehill Enterprises
bobs@sagehill.net




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