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Re: [xsl] variable change in xsl:for-each
Subject: Re: [xsl] variable change in xsl:for-each From: Jeni Tennison <jeni@xxxxxxxxxxxxxxxx> Date: Mon, 22 Jul 2002 19:01:08 +0100 |
jdgarrett@xxxxxxxxxx wrote: > The issue may occur where you might want to skip a row based upon > another criteria rather than the fact that you current position is > odd or even.... > > <rows> > <item position="1" visible="1">value</item> > <item position="2" visible="0">value</item> > <item position="3" visible="1">value</item> > <item position="4" visible="1">value</item> > <item position="5" visible="1">value</item> > <item position="6" visible="0">value</item> > </rows> > > if you then used position in the document to indicate what color a > row would be then the code below would not work as desired... True. > so the solution is to call a function to set your variable I guess you could, but it's not a very good idea in XSLT, since one of the fundamental features of XSLT is that the order in which nodes are actually processed doesn't matter -- a processor could perform the transformation in reverse and it shouldn't change the result. So in XSLT it's easier and better to simply select the nodes that you want to show and use position() as normal: <xsl:for-each select="item[@visible = 1]"> <xsl:variable name="RowColor"> <xsl:choose> <xsl:when test="position() mod 2 = 1">#FFFFFF</xsl:when> <xsl:otherwise>#FFFF11</xsl:otherwise> </xsl:choose> </xsl:variable> <tr><td bgcolor="{$RowColor}"><xsl:value-of select="."></td></tr> </xsl:for-each> If the algorithm for selecting the nodes is very complex, such that you can't get hold of a node set containing the items that you want to include in the rows, then a recursive solution is better: <xsl:template name="createRows"> <xsl:param name="rows" select="/rows/item" /> <xsl:param name="RowColor" select="'#FFFFFF'" /> <xsl:choose> <xsl:when test="$rows[1]/@visible = 1"> <tr><td bgcolor="{$RowColor}"><xsl:value-of select="."></td></tr> <xsl:call-template name="createRows"> <xsl:with-param name="rows" select="$rows[position() > 1]" /> <xsl:with-param name="RowColor"> <xsl:choose> <xsl:when test="$RowColor = '#FFFFFF'">#FFFF11</xsl:when> <xsl:otherwise>#FFFFFF</xsl:otherwise> </xsl:choose> </xsl:with-param> </xsl:call-template> </xsl:when> <xsl:when test="$rows[2]"> <xsl:call-template name="createRows"> <xsl:with-param name="rows" select="$rows[position() > 1]" /> <xsl:with-param name="RowColor" select="$RowColor" /> </xsl:call-template> </xsl:when> </xsl:choose> </xsl:template> Cheers, Jeni --- Jeni Tennison http://www.jenitennison.com/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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