Re: [docbook-apps] Formatting variables in a Template

["Bob Stayton" <bobs@sagehill.net>]

Hi David,
This is an issue of XSL syntax, in which variables are write-once.  That
takes some getting used to.  Basically you have to put all the decision
making for a variable's value in the body of the variable, that is, between
its open and closing tags:

<xsl:variable name="notice.color">
  <xsl:choose>
    <xsl:when test=="/*/@conformance='535.6'">#ffffff</xsl:when>
    <xsl:otherwise>#000000</xsl:otherwise>
  </xsl:choose>
</xsl:variable>

Also keep in mind that the scope of a variable is its container element.
If you set a variable inside an xsl:if, then that variable's existence ends
when you exit the xsl:if, so it cannot be used outside the xsl:if.

Bob Stayton
Sagehill Enterprises
DocBook Consulting
bobs@sagehill.net


----- Original Message ----- 
From: "David White" <davidw@kencook.com>
To: <docbook-apps@lists.oasis-open.org>
Sent: Thursday, March 02, 2006 7:46 AM
Subject: [docbook-apps] Formatting variables in a Template


> Hello All!
>
> I've got some bad code thats not working as needed.  I am trying to
define
> variables within a template and have a conditional statement adjust those
> variables to be used as attributes in a fo:block.
>
> Below is the XSLT code, It's intended to take a <important> tag and
format
> it based upon the root tag having a conformance attribute of 535.6
>
> Its sets the values for notice.color, notice.width and notice.text.color
but
> it then always ignores the <xsl:if test="/*/@conformance='535.6'">
> statement.
>
>
>
> Any suggestions?
>
> XSLT code:
>
> <xsl:template match="important">
>
> <xsl:variable name="id">
>
> <xsl:call-template name="object.id"/>
>
> </xsl:variable>
>
> <xsl:variable name="notice.width" select="100"/>
>
> <xsl:variable name="notice.color">#ffffff</xsl:variable>
>
> <xsl:variable name="notice.text.color">#000000</xsl:variable>
>
> <xsl:if test="/*/@conformance='535.6'">
>
> <xsl:attribute name="notice.color">#007dc0</xsl:attribute>
>
> <xsl:variable name="notice.text.color">#ffffff</xsl:variable>
>
> <xsl:if test="/*/@role='Safety'">
>
> <!-- Set parameters for 535.6 notices NOT in safety chapter -->
>
> <xsl:variable name="notice.width" select="50"/>
>
> </xsl:if>
>
> </xsl:if>
>
> <fo:block font-family="{$body.font.family}" padding-top="5pt"
> padding-bottom="0pt" padding-left="5pt" padding-right="5pt"
> width="{$notice.width}%" id="{$id}">
>
> <fo:table keep-together.within-column="always" width="{$notice.width}%"
> padding-bottom="10pt">
>
> <fo:table-body start-indent="0pt" end-indent="0pt">
>
> <fo:table-row>
>
> <fo:table-cell padding-bottom="4pt">
>
> <fo:block color="{$notice.text.color}" background-color="{$notice.color}"
> vertical-align="bottom" height="20pt" padding="1pt" text-align="center"
> font-weight="bold" font-style="italic">
>
> <xsl:call-template name="gentext">
>
> <!--NEED NOTICE HERE -->
>
> <!--<xsl:with-param name="key" select="'NOTICE'"/>-->
>
> <xsl:with-param name="key" select="'IMPORTANT'"/>
>
> </xsl:call-template>
>
> </fo:block>
>
> </fo:table-cell>
>
> </fo:table-row>
>
> </fo:table-body>
>
> </fo:table>
>
> </fo:block>
>
> <!-- Actual Note contents -->
>
> <fo:block font-family="{$body.font.family}" padding-top="0pt"
> padding-bottom="10pt" padding-left="5pt" padding-right="5pt">
>
> <fo:table keep-together.within-column="always"
> keep-with-previous.within-column="always">
>
> <fo:table-body start-indent="0pt" end-indent="0pt">
>
> <fo:table-row>
>
> <fo:table-cell>
>
> <fo:block xsl:use-attribute-sets="note.properties">
>
> <xsl:apply-templates/>
>
> </fo:block>
>
> </fo:table-cell>
>
> </fo:table-row>
>
> </fo:table-body>
>
> </fo:table>
>
> </fo:block>
>
> </xsl:template>
>
>
>
> XML Code:
>
>
>
> <chapter conformance="535.6">
>
> <title>Safety</title>
>
> <sect1>
>
> <title role="strong">General Safety Precautions</title>
>
> <para>para>
>
>
> <important>
>
> <para role="strong">some important text<para>
>
> </important>
>
>
>
> Thanks,
>
> David White
>
>