RE: [xsl] left-trim function

[Jarno dot Elovirta at nokia dot com]

Hi,

> Has anybody an idea how to implement an left-trim / 
> right-trim function which strips out all leading chars of a 
> string? If its not possible directly with standard xslt I can 
> also use XALAN built in function, but I never made this.

<xsl:template name="left-trim">
  <xsl:param name="s" />

  <xsl:choose>
    <xsl:when test="normalize-space(substring($s, 1, 1)) = ''">
      <xsl:call-template name="left-trim">
        <xsl:with-param name="s" select="substring($s, 2)" />
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$s" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="right-trim">
  <xsl:param name="s" />

  <xsl:choose>
    <xsl:when test="normalize-space(substring($s, string-length($s))) = ''">
      <xsl:call-template name="right-trim">
        <xsl:with-param name="s" select="substring($s, 1, string-length($s) - 1)" />
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$s" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

Shouldn't be difficult to combine the two.

Santtu

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