Subject: Re: adding string-length values From: Jeni Tennison <mail@xxxxxxxxxxxxxxxx> Date: Thu, 23 Nov 2000 09:46:08 +0000 |
Zeljko, > Well, I'm using Xalan ! But if I understand it right, it should look similar to > this: > > <xsl:temaple match="Para"> > <xsl:variable name="mycounter" select="$mycounter_from_parent_node + string-length(.)">> > <xsl:if test="mycounter < 1000"> > Char count: <xsl:value-of select="$mycounter"/> > <xsl:apply-templates select="Para"/> > <xsl:if/> > <xsl:template/> > > Unfortunately I do not know how to obtain the value of $mycounter from the > parent-node (here: $mycounter_from_parent_node)!! There are too many > possibilities (e.g. '../$mycounter') to try them all! :( The usual way to do this kind of recursion is to get the total from 'the rest of the Paras' and then add it to the string length of the 'current Para'. So: <xsl:template match="Para" mode="get-string-length"> <xsl:variable name="total_of_rest"> <!-- get the total from the remaining Paras --> </xsl:variable> <xsl:value-of select="$total_of_rest + string-length(.)" /> </xsl:template> In your example, you're dealing with Paras scattered at all levels of the document tree, so 'the rest of the Paras' are all the Para elements that either follow this Para or are its descendants. To get the list of these Paras, use: following::Para | descendant::Para You can get the total string length of these Para elements by applying templates to the first one, so you're only interested in the first Para in that list: (following::Para | descendant::Para)[1] So the Para-matching recursive template looks like: <xsl:template match="Para" mode="get-string-length"> <xsl:variable name="total_of_rest"> <xsl:apply-templates select="(following::Para | descendant::Para)[1]" mode="get-string-length" /> </xsl:variable> <xsl:value-of select="$total_of_rest + string-length(.)" /> </xsl:template> In order to kick the process off, you want to apply templates to the very first Para in the document. So, in your controlling template, you need to apply templates to that Para only: <xsl:template match="Article"> ... Total Chars: <xsl:apply-templates select="Para[1]" mode="get-string-length" /> ... </xsl:template> I've used modes in the above because I think it's likely that you're going to want to do other things with the Para elements as well as measure the length of the strings. I hope that helps, Jeni --- Jeni Tennison http://www.jenitennison.com/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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