The Lucene split.xsl source code
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<!--
This stylesheet was taken from the XSLT FAQ http://www.dpawson.co.uk/xsl/
Comments and adaption to be used without normalize-space()
by forrest-dev@xml.apache.org
-->
<!--
Input:
<doc>
<para>
123456 2345 343434 545454 43434 343
12345 343434 545454 43434 343
32345645 343434 545454 43434 343
3422222225 343434 545454 43434 343
llllllllllllllllllllllooooooooooooooonnnnnnnnnnnggggggggg
345 343434 545454 43434 343
</para>
</doc>
Output:
<HTML>
<BODY>
<PRE>123456 2345 343434 545454
43434 343 12345 343434 545454
43434 343 32345645 343434
545454 43434 343 3422222225
343434 545454 43434 343
lllllllllllllllllllllloooooooo
ooooooonnnnnnnnnnnggggggggg
345 343434 545454 43434
343
</PRE>
</BODY>
</HTML>
Fragment ised:
<xsl:template match="/doc">
<HTML> <xsl:call-template name="format">
<xsl:with-param select="normalize-space(para)" name="txt" />
<xsl:with-param name="width">30
</xsl:call-template>
</PRE>
</xsl:template>
-->
<xsl:template match="/body">
<body>
<xsl:call-template name="format">
<xsl:with-param select="source" name="txt" />
<xsl:with-param name="width">40
</xsl:call-template>
</body>
</xsl:template>
<xsl:template name="format">
<xsl:param name="txt" />
<xsl:param name="width" />
<!-- if there is still text left -->
<xsl:if test="$txt">
<xsl:variable name = "pretxt" select = "substring($txt,0, $width)" />
<xsl:choose>
<xsl:when test="contains($pretxt, '
')">
<xsl:value-of select="substring-before($pretxt, '
')"/>
<xsl:text>
<xsl:call-template name="format">
<xsl:with-param name="txt" select="substring-after($txt,'
')"/>
<xsl:with-param select="$width" name="width" />
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<!-- get the width at which to break-->
<xsl:variable name="real-width">
<xsl:call-template name="tune-width">
<xsl:with-param select="$txt" name="txt" />
<xsl:with-param select="$width" name="width" />
<xsl:with-param select="$width" name="def" />
</xsl:call-template>
</xsl:variable>
<!-- output the first part of the broken string -->
<xsl:value-of select="substring($txt, 1, $real-width)" />
<!-- output a newline -->
<xsl:text>
<!-- call itself with the remaining part of the text -->
<xsl:call-template name="format">
<xsl:with-param select="substring($txt,$real-width + 1)" name="txt" />
<xsl:with-param select="$width" name="width" />
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:if>
</xsl:template>
<!-- used by template "format", it calculates the width at the given def
It starts at def length and comes back till it finds a space -->
<xsl:template name="tune-width">
<xsl:param name="txt" />
<xsl:param name="width" />
<xsl:param name="def" />
<xsl:choose>
<xsl:when test="$width = 0">
<xsl:value-of select="$def" />
</xsl:when>
<xsl:when test="substring($txt, $width, 1 ) = ' '">
<xsl:value-of select="$width" />
</xsl:when>
<xsl:otherwise>
<!-- otherwise need to tune again, trying with $width - 1 -->
<xsl:call-template name="tune-width">
<xsl:with-param select="$width - 1" name="width" />
<xsl:with-param select="$txt" name="txt" />
<xsl:with-param select="$def" name="def" />
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
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