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138 | <?xml version='1.0'?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version='1.0'>
<!--############################################################################
XSLT Stylesheet DocBook -> LaTeX
############################################################################ -->
<xsl:param name="tex.math.in.alt" select="'latex'"/>
<xsl:param name="alt.use" select="0"/>
<xsl:param name="equation.default.position">[H]</xsl:param>
<xsl:template match="inlineequation|informalequation" name="equation">
<xsl:choose>
<xsl:when test="alt and $tex.math.in.alt='latex'">
<xsl:apply-templates select="alt" mode="latex"/>
</xsl:when>
<xsl:when test="alt and (count(child::*)=1 or $alt.use='1')">
<!-- alt is simply some text -->
<xsl:apply-templates select="alt"/>
</xsl:when>
<xsl:otherwise>
<xsl:apply-templates select="*[not(self::alt)]"/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template match="equation">
<xsl:variable name="delim">
<xsl:call-template name="pi.texmath_delimiters">
<xsl:with-param name="node" select="descendant::alt"/>
</xsl:call-template>
</xsl:variable>
<xsl:choose>
<xsl:when test="title">
<xsl:text> \begin{dbequation}</xsl:text>
<!-- float placement preference -->
<xsl:choose>
<xsl:when test="@floatstyle != ''">
<xsl:value-of select="@floatstyle"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$equation.default.position"/>
</xsl:otherwise>
</xsl:choose>
<xsl:text> </xsl:text>
<xsl:call-template name="equation"/>
<xsl:text> \caption{</xsl:text>
<xsl:call-template name="normalize-scape">
<xsl:with-param name="string" select="title"/>
</xsl:call-template>
<xsl:text>} </xsl:text>
<xsl:call-template name="label.id"/>
<xsl:text> \end{dbequation} </xsl:text>
</xsl:when>
<xsl:when test="$delim='user'">
<!-- The user provide its own environment -->
<xsl:call-template name="equation"/>
</xsl:when>
<xsl:otherwise>
<!-- This is an actual LaTeX equation -->
<xsl:text> \begin{equation} </xsl:text>
<xsl:call-template name="label.id"/>
<xsl:call-template name="equation"/>
<xsl:text> \end{equation} </xsl:text>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template match="alt|mathphrase">
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="equation/title"/>
<!-- Direct copy of the content -->
<xsl:template match="alt" mode="latex">
<xsl:variable name="delim">
<xsl:call-template name="pi.texmath_delimiters"/>
</xsl:variable>
<xsl:variable name="tex">
<xsl:variable name="text" select="normalize-space(.)"/>
<xsl:variable name="len" select="string-length($text)"/>
<xsl:choose>
<xsl:when test="$delim='user'">
<xsl:copy-of select="."/>
</xsl:when>
<xsl:when test="ancestor::equation[not(child::title)]">
<!-- Remove any math mode in an equation environment -->
<xsl:choose>
<xsl:when test="starts-with($text,'$') and
substring($text,$len,$len)='$'">
<xsl:copy-of select="substring($text, 2, $len - 2)"/>
</xsl:when>
<xsl:when test="(starts-with($text,'\[') and
substring($text,$len - 1,$len)='\]') or
(starts-with($text,'\(') and
substring($text,$len - 1,$len)='\)')">
<xsl:copy-of select="substring($text, 3, $len - 4)"/>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="."/>
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<!-- Test to be DB5 compatible, where <alt> can be in other elements -->
<xsl:when test="ancestor::equation or
ancestor::informalequation or
ancestor::inlineequation">
<!-- Keep the specified math mode... -->
<xsl:choose>
<xsl:when test="(starts-with($text,'\[') and
substring($text,$len - 1,$len)='\]') or
(starts-with($text,'\(') and
substring($text,$len - 1,$len)='\)') or
(starts-with($text,'$') and
substring($text,$len,$len)='$')">
<xsl:copy-of select="$text"/>
</xsl:when>
<!-- ...Or wrap in default math mode -->
<xsl:otherwise>
<xsl:copy-of select="concat('$', $text, '$')"/>
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:otherwise/>
</xsl:choose>
</xsl:variable>
<!-- Encode it properly -->
<xsl:call-template name="scape-encode">
<xsl:with-param name="string" select="$tex"/>
</xsl:call-template>
</xsl:template>
</xsl:stylesheet>
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