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Subject: Re: DOCBOOK-APPS: What's the most appropriate (and futureproof) way tostyle the FO?
On Thu, Feb 06, 2003 at 11:16:17PM +0100, Tobias Reif wrote: > Hi > > Let's say I want to change all sect1 titles. I grab my > titlepage.templates.xml copy (1.60.1), then insert > font-weight="100" > into > > <t:titlepage t:element="sect1" t:wrapper="fo:block"> > <t:titlepage-content t:side="recto"> > <title > margin-left="{$title.margin.left}" > font-family="{$title.font.family}"/> > > so I get > > <t:titlepage t:element="sect1" t:wrapper="fo:block"> > <t:titlepage-content t:side="recto"> > <title > font-weight="100" > margin-left="{$title.margin.left}" > font-family="{$title.font.family}"/> > > The FO changes from > > <fo:block id="d0e135"> > <fo:block><fo:block> > <fo:block keep-together="always" margin-left="-4pc" > font-family="sans-serif"> > <fo:block keep-with-next.within-column="always"> > <fo:block font-family="sans-serif" font-weight="bold" > keep-with-next.within-column="always" space-before.minimum="0.8em" > space-before.optimum="1.0em" space-before.maximum="1.2em"> > <fo:marker marker-class-name="section.head.marker">Prerequisites > > to > > <fo:block id="d0e135"> > <fo:block> > <fo:block> > <fo:block keep-together="always" font-weight="100" margin-left="-4pc" > font-family="sans-serif"> > <fo:block keep-with-next.within-column="always"> > <fo:block font-family="sans-serif" font-weight="bold" > keep-with-next.within-column="always" space-before.minimum="0.8em" > space-before.optimum="1.0em" space-before.maximum="1.2em"> > <fo:marker marker-class-name="section.head.marker">Prerequisites > > My font-weight="100" gets inserted, but gets overriden by > font-weight="bold". > > My question is: > > Is the purpose of the titlepage mechanism to supersede and obsolete the > property set option params, or are both mechansims intended to be combined? Norm might want to answer this too, but I believe the mechanisms are meant to be combined, in a hierarchical manner. The titlepage.templates mechanism establishes the default values, and the propery attribute-sets provide the runtime flexibility. As you know, editing a copy of titlepage.templates.xml and regenerating titlepage.templates.xsl is not something you want to do very often. It can be used to set properties, but think of them as the new default properites. It is important to retain the ability to change properties at run time, using parameters and attribute-sets. Since the attribute-set properties appear in an fo:block nested inside the fo:block from the titlepage template, it can override the defaults. Here is where the properties come from in your first example above: 1. From attribute-set 'section.titlepage.recto.style' in fo/titlepage.xsl: <fo:block keep-together="always" 2. From titlepage.templates.xml: margin-left="-4pc" font-family="sans-serif"> 3. From <xsl:template match="section/title|..." mode="titlepage.mode"> in fo/sections.xsl: <fo:block keep-with-next.within-column="always"> 4. From attribute-set 'section.title.properties' in fo/param.xsl: <fo:block font-family="sans-serif" font-weight="bold" keep-with-next.within-column="always" space-before.minimum="0.8em" space-before.optimum="1.0em" space-before.maximum="1.2em"> 5. From attribute-set 'section.title.level1.properties' in fo/param.xsl (not included in your example): <fo:block font-size="20.736pt"> In your case, you can make the change to font-weight=100 without regenerating titlepage.templates.xsl. The attribute-set 'section.title.properties' in fo/param.xsl sets properties for all section title levels, while 'section.title.level1.properties' adds properties specific to sect1 level headings. Change the font-weight in 'section.title.properties' from 'bold' to '100', and it will apply to all section title levels. I can't say how 'futureproof" these various mechanisms are. It kind of seems like there are too many places to set properties, but I believe some of that is the result of stylesheet evolution, rather than by design. So perhaps these will be consolidated a bit in the future. -- Bob Stayton 400 Encinal Street Publications Architect Santa Cruz, CA 95060 Technical Publications voice: (831) 427-7796 The SCO Group fax: (831) 429-1887 email: bobs@sco.com
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