resolve.path — Resolve any ../ in path, except leading ../
This function resolves any relative ../ parts of a file path.
<xsl:template name="resolve.path">
<xsl:param name="filename" select="''"></xsl:param>
<xsl:choose>
<!-- Leading .. are not eliminated -->
<xsl:when test="starts-with($filename, '../')">
<xsl:value-of select="'../'"></xsl:value-of>
<xsl:call-template name="resolve.path">
<xsl:with-param name="filename" select="substring-after($filename, '../')"></xsl:with-param>
</xsl:call-template>
</xsl:when>
<xsl:when test="contains($filename, '/../')">
<xsl:call-template name="resolve.path">
<xsl:with-param name="filename">
<xsl:call-template name="dirname">
<xsl:with-param name="filename" select="substring-before($filename, '/../')"></xsl:with-param>
</xsl:call-template>
<xsl:value-of select="substring-after($filename, '/../')"></xsl:value-of>
</xsl:with-param>
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$filename"></xsl:value-of>
</xsl:otherwise>
</xsl:choose>
</xsl:template>