Altova Mailing List Archives


Re: [xsl] Hierarchy based on indentation (long)

From: Grainne Reilly <greilly1@--------->
To:
Date: 12/9/2002 9:29:00 PM
Thanks Dimitre for this approach which certainly is more comprehendible 
than my original.  I can't rely on the number of spaces per indentation 
level being consistent, I can only rely on each indentation level having 
the same number of spaces. I have made an attempt to adapt your code to 
cover that (see below).



Grainne.



<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
 xmlns:saxon="http://icl.com/saxon"
xmlns:exsl="http://exslt.org/common"
extension-element-prefixes="exsl saxon">
<xsl:output omit-xml-declaration="yes" indent="yes"/>

<xsl:template match="/">

          <xsl:variable name="vSortedRows">

                <xsl:apply-templates select="/*/row" mode="sort">

                        <xsl:sort data-type="number" 
select="string-length(substring-before(cell,substring(normalize-space(cell), 
1,1)))"/>

                </xsl:apply-templates>

          </xsl:variable>



        <xsl:variable name="vtLevels">

                <xsl:call-template name="getLevels">

                        <xsl:with-param name="pSortedRows" 
select="exsl:node-set($vSortedRows)/row"/>

                   </xsl:call-template>

           </xsl:variable>

           <xsl:variable name="vLevels" select="exsl:node-set($vtLevels)"/>



        <xsl:for-each select="/*/row">

                <xsl:variable name="vThisIndent" 
select="string-length(substring-before(cell,substring(normalize-space(cell), 
1,1)))"/>

                <descriptions>

                        <xsl:call-template name="genDescription">

                        <xsl:with-param name="pNode" select="."/>

                                <xsl:with-param name="pRow" 
select="position()"/>

                                <xsl:with-param name="pLevels" 
select="$vLevels"/>

                                <xsl:with-param name="pLevel" 
select="$vLevels/level[@indent = $vThisIndent]/@num"/>

                        </xsl:call-template>

                </descriptions>

    </xsl:for-each>

</xsl:template>



<xsl:template match="row" mode="sort">
        <xsl:copy-of select="."/>
</xsl:template>

<xsl:template name="getLevels">

        <xsl:param name="pSortedRows" select="/.."/>

        <xsl:param name="pLevelNumber" select="1"/>

        <xsl:variable name="vThisIndent" 
select="string-length(substring-before($pSortedRows[1]/cell,substring(normalize-space($pSortedRows[1]/cell), 
1,1)))"/>

        <xsl:variable  name="vNext" 
select="$pSortedRows/following-sibling::row[string-length(substring-before(cell,substring(normalize-space(cell), 
1,1))) > $vThisIndent ]" />



        <level num="{$pLevelNumber}" indent="{$vThisIndent}"/>



        <xsl:if test="$vNext">

                <xsl:call-template name="getLevels">

                        <xsl:with-param name="pSortedRows" select="$vNext"/>

                        <xsl:with-param name="pLevelNumber" 
select="$pLevelNumber + 1"/>

                </xsl:call-template>

        </xsl:if>

</xsl:template>



<xsl:template name="genDescription">
    <xsl:param name="pNode" select="/.."/>
    <xsl:param name="pRow" />
    <xsl:param name="pLevel"/>
    <xsl:param name="pLevels" select="/.."/>

  <xsl:if test="$pLevel > 1">

    <xsl:variable name="vindentParent" select="$pLevels/level[@num = 
($pLevel - 1)]/@indent"/>



    <xsl:variable name="vParent"

     select="preceding-sibling::row[ cell[ 
string-length(substring-before(.,substring(normalize-space(.), 1,1))) = 
$vindentParent ] ][1]"/>



    <xsl:call-template name="genDescription">
      <xsl:with-param name="pNode" select="$vParent"/>
      <xsl:with-param name="pRow" select="$pRow"/>
      <xsl:with-param name="pLevel" select="$pLevel - 1"/>
      <xsl:with-param name="pLevels" select="$pLevels"/>
    </xsl:call-template>
  </xsl:if>


  <description row="{$pRow}" level="{$pLevel}">
    <xsl:value-of select="$pNode/cell"/>
  </description>

</xsl:template>



</xsl:stylesheet>




<snip/>



Hi Grainne,



It seems to me that the following solution is simpler. It uses a
recursively called named template to generate the descriptions, and
also the fact that the indent for every next level is 3:

<snip/>



=====
Cheers,

Dimitre Novatchev.
http://fxsl.sourceforge.net/ -- the home of FXSL

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