RE: Bread-crumbs nav from nested hierarchy in reverse

The simple answer is recursion: instead of doing apply-templates on the
children of a node, do apply-templates on its parent (but in a special
mode, to avoid infinite loops).

Alternatively,

<xsl:sort select="position()" data-type="number" order="descending"/>

will process a node-set in reverse document order.

Michael Kay

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Simerman, Joshua Michael
> Sent: 19 August 2003 04:52
> To: XSL-List@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  Bread-crumbs nav from nested hierarchy in reverse order
> 
> 
> I'm trying to create bread-crumbing for the navigation of a 
> website. I have the site hierarchy in a forwards nested 
> document like below. The only way I could figure out how to 
> get the bread crumbs at all was to get a backwards result. 
> Once I have the result doc, I dump it as a srting to the 
> browser. Got any ideas of a simple way to reverse the order 
> in xsl, or a better way to write my first xsl?
> 
> Here's how my xml document is formed.
> 
> <page>
> 	<title>Home Page<title>
> 	<pageid>1</pageid>
> 	<page>
> 		<title>Parent Page</title>
> 		<pageid>2</pageid>
> 		<page>
> 			<title>This Page</title>
> 			<pageid>3</pageid>
> 		</page>
> 	<page>
> </page>
> 
> Here's the xslt I wrote up.
> 
> <xsl:stylesheet version="1.0" 
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
> <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
> 	<xsl:param name="pageid" select="23"/>
> 	<xsl:template match="/">
> 		<docroot>
> 			<xsl:apply-templates mode="first"/>
> 		</docroot>
> 	</xsl:template>
> 	<xsl:template match="node()" mode="first">
> 		<xsl:apply-templates select="page" mode="first"/>
> 		<xsl:if test="pageid=$pageid">
> 			<xsl:call-template name="bread-crumb"/>
> 		</xsl:if>
> 	</xsl:template>
> 	<xsl:template match="node()" mode="ancestor">
> 		<xsl:call-template name="bread-crumb"/>
> 	</xsl:template>
> 	<xsl:template name="bread-crumb">
> 		<xsl:text>&gt;&gt;</xsl:text>
> 		<xsl:element name="a">
> 			<xsl:attribute
> name="href">index.cfm?pageid=<xsl:value-of
> select="pageid"/></xsl:attribute>
> 			<xsl:value-of
> select="normalize-space(pagetitle)"/>
> 		</xsl:element>
> 		<xsl:if test="../pageid">
> 			<xsl:apply-templates select=".."
> mode="ancestor"/>
> 		</xsl:if>
> 	</xsl:template>
> </xsl:stylesheet>
> 
> This is what I end up with.
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <docroot>
> 	<a href="index.cfm?pageid=23">Laptop Requirements</a>
> 	<a href="index.cfm?pageid=21">Computing</a>
> 	<a href="index.cfm?pageid=20">Once you're admitted</a>
> 	<a href="index.cfm?pageid=1">Admissions</a>
> </docroot>
> 
> Here's the browser view.
> 
> >>Laptop Requirements>>Computing>>Once you're admitted>>Admissions
> 
> 
> 
> Josh Simerman
> Graduate Assistant, Web Developer
> Systems & Accounting Graduate Programs
> Indiana University, Kelley School of Business
> 
> 
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> 


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