Description

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>