Formatting text output handler [WAS : Re: Formating to text]

[Eric van der Vlist <vdv@xxxxxxxxxxxx>]

For those who have followed this thread and are interested by the
riddle, the transformation can be done by the attached stylesheet.

Now, this is so verbose and slow that I wonder if writing a formatting
text output handler wouldn't really be the best solution.

Anyone interested by such a product (or having developed one) ?

Thanks

Eric

PS: one could also transform to HTML and use "lynx -dump" but its
wouldn't be fair, would it ?

-- 
------------------------------------------------------------------------
Eric van der Vlist                                             Dyomedea
http://xmlfr.org         http://ducotede.com        http://dyomedea.com
------------------------------------------------------------------------

<?xml version="1.0" encoding="utf-8"?>
<b ident="0" cr="1">
	<w value="this"/>
	<w value="is"/>
	<w value="a"/>
	<w value="list"/>
	<w value=":"/>
	<b ident="0" cr="1">
		<w value="."/>
		<b ident="1" cr="0">
			<w value="itemmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm"/>
			<w value="1"/>
		</b>
	</b>
	<b ident="0" cr="1">
		<w value="."/>
		<b ident="1" cr="0">
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="item"/>
			<w value="2"/>
		</b>
	</b>
	<w value="end"/>
	<w value="of"/>
	<w value="the"/>
	<w value="list"/>
	<b ident="1" cr="1">
		<w value="indentation"/>
	</b>
</b>

<?xml version="1.0" encoding='iso-8859-1'?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
  xmlns:xt="http://www.jclark.com/xt";
  >

<xsl:output indent="yes" encoding="iso-8859-1" method="text"/>

<xsl:template name="next">
	<xsl:param name="pos"/>
	<xsl:param name="hpos"/>
	<xsl:apply-templates select="/descendant-or-self::*[position()=($pos+1)]">
		<xsl:with-param name="pos" select="$pos+1"/>
		<xsl:with-param name="hpos" select="$hpos"/>
	</xsl:apply-templates>
</xsl:template>

<xsl:template name="spaces">
	<xsl:param name="number"/>
	<xsl:value-of select="' '"/>
	<xsl:if test="$number &gt; 1">
		<xsl:call-template name="spaces">
			<xsl:with-param name="number" select="$number - 1"/>
		</xsl:call-template>
	</xsl:if>
</xsl:template>

<xsl:template name="line-break">
	<xsl:param name="pos"/>
	<xsl:param name="word"/>
	<xsl:param name="depth"/>
	<xsl:value-of select="'&#10;'"/>
	<xsl:if test="$depth &gt; 0">
		<xsl:call-template name="spaces">
			<xsl:with-param name="number" select="$depth"/>
		</xsl:call-template>
	</xsl:if>
	<xsl:choose>
		<xsl:when test="$word!=''">
			<xsl:value-of select="concat($word, ' ')"/>
			<xsl:call-template name="next">
				<xsl:with-param name="pos" select="$pos"/>
				<xsl:with-param name="hpos" select="$depth + string-length($word)+1"/>
			</xsl:call-template>
		</xsl:when>
		<xsl:otherwise>
			<xsl:call-template name="next">
				<xsl:with-param name="pos" select="$pos"/>
				<xsl:with-param name="hpos" select="$depth"/>
			</xsl:call-template>
		</xsl:otherwise>
	</xsl:choose>
</xsl:template>

<xsl:template match="*">
	<xsl:param name="pos" select="1"/>
	<xsl:param name="hpos" select="1"/>
	<xsl:param name="depth" select="sum(ancestor-or-self::b/@ident)"/>
	<xsl:choose>
		<xsl:when test="@cr=1">
			<xsl:call-template name="line-break">
				<xsl:with-param name="pos" select="$pos"/>
				<xsl:with-param name="depth" select="$depth"/>
			</xsl:call-template>
		</xsl:when>
		<xsl:when test="@value!=''">
			<xsl:choose>
				<xsl:when test="($depth + $hpos + string-length(@value) +1) &lt; 75">
					<xsl:value-of select="concat(@value, ' ')"/>
					<xsl:call-template name="next">
						<xsl:with-param name="pos" select="$pos"/>
						<xsl:with-param name="hpos" select="$hpos + string-length(@value)+1"/>
					</xsl:call-template>
				</xsl:when>
				<xsl:otherwise>
					<xsl:call-template name="line-break">
						<xsl:with-param name="pos" select="$pos"/>
						<xsl:with-param name="depth" select="$depth"/>
						<xsl:with-param name="word" select="@value"/>
					</xsl:call-template>
				</xsl:otherwise>
			</xsl:choose>
		</xsl:when>
		<xsl:otherwise>
			<xsl:call-template name="next">
				<xsl:with-param name="pos" select="$pos"/>
				<xsl:with-param name="hpos" select="$hpos"/>
			</xsl:call-template>
		</xsl:otherwise>
	</xsl:choose>
</xsl:template>


</xsl:stylesheet>