RE: [TFUI] OT? "if" in XSLT (Re: XML -> XSLT -> XHTML Nirvana)

"Bayley, Alistair" <[email protected]> Mon, 14 Mar 2005 13:24:02 -0000
Newsgroups gmane.comp.programming.test-first-user-interfaces
Message-ID <7DFF3BC6CA957441AEADA7F340BFAA340A0293D9@GBLONEX11.lon.invesco.com> 
<HTML>
<BODY>
> From: Ron Jeffries [mailto:[email protected]] 
> 
> In my site generation XSLT, an article has two titles. One, <title>
> is used most of the time. But if a title named <shorttitle> exists,
> that title is to be used in the index pages. Basically it's
> necessary to /decide/ whether title should be applied, based on
> whether shorttitle is there. The code looks like this, basically
> suppressing title in favor of shorttitle:


I took your XML and tested it with some sample input, to see what it would
produce:

-- input:
<header>
  <title>title-text</title>
  <shorttitle>shorttitle-text</shorttitle>
  <file>file1.txt</file>
</header>

-- output (formatted for Yahoo-groups):
<?xml version="1.0" encoding="UTF-16"?>
  <span class="indextitle" xmlns:msxsl="urn:schemas-microsoft-com:xslt" />
  <span class="indextitle" xmlns:msxsl="urn:schemas-microsoft-com:xslt">
    <a href="root/xpmag/file1.txt">shorttitle-text</a>
  </span>
  file1.txt

Ignoring the "file1.txt" crud at the end (I'm not sure why this is
happening; my XSLT-fu is mediocre), you can see that both templates produce
output. The title template produces an empty <span>, because the test is
inside the <span>. I assume that this is not what you intended, although
harmless.

Do you think maybe this would be a better way?

<xsl:template match="header/title">
  <span class="indextitle">
    <a>
      <xsl:attribute name="href">
        <xsl:value-of select="$root"/>xpmag/<xsl:value-of select="../file"/>
      </xsl:attribute>
      <xsl:choose>
        <xsl:when test="not(../shorttitle)"><xsl:value-of
select="../title"/></xsl:when>
        <xsl:otherwise><xsl:value-of
select="../shorttitle"/></xsl:otherwise>
      </xsl:choose>
    </a>
  </span>
</xsl:template>


It produces the link correctly, but there's still extra crud in the output,
just like the "file1.txt" line in the first test.

Alistair.
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