with-param nodeset

RoeZ · November 1st, 2007, 03:50 AM

Hi again,
I again have a question that i think is quite simple, but i just cant find it on google or this forum, because i don't know what to search for :(

I am trying to make a select box with multiple languages, I have made a template that displays the select box :

Code:

<xsl:template name="select">
    <xsl:param name="name" />
    <xsl:param name="selected" />
    <xsl:param name="options" />
    <select>
        <xsl:attribute name="name">
            <xsl:value-of select="$name" />
        </xsl:attribute>
        <xsl:for-each select="$options/option">
            <option>
                <xsl:attribute name="value">
                    <xsl:value-of select="value" />
                </xsl:attribute>
                <xsl:if test="name = $selected">
                    <xsl:attribute name="selected">selected</xsl:attribute>
                </xsl:if>
                <xsl:value-of select="name" />
            </option>
        </xsl:for-each>
    </select>
</xsl:template>

I call this template with this code :

Code:

<xsl:call-template name="select">
    <xsl:with-param name="options">
        <option>
            <name>English</name>
            <value>en</value>
        </option>
        <option>
            <name>Netherlands</name>
            <value>nl</value>
        </option>
    </xsl:with-param>
    <xsl:with-param name="name">languageLanguage</xsl:with-param>
</xsl:call-template>

problem is, it seems that the parameter 'options' is seen as a 'string' and not a 'nodeset', i get the folowwing errors:
- Invalid type
- runtime error
- Failed to evaluate the 'select' expression
The errors apply to the for-each in the 'select' template.

Any ideas how I can send a 'nodeset' with a param? or am I getting my implementation wrong? Any help would be apreciated

mhkay · November 1st, 2007, 04:05 AM

XSLT 1.0 has this crazy restriction that when you create a temporary tree (called a "result tree fragment"), which is what your with-param is doing, then the only two things you can do with the value are (a) copy it using copy-of, or (b) reduce it to a string. Many processors let you get round this with an xx:node-set() extension function - the actual name varies from one processor to another - you can then write <xsl:for-each select="xx:node-set($options)/option">.

Alternatively, use XSLT 2.0 which removes this restriction.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

RoeZ · November 1st, 2007, 05:29 AM

Thank you for the information Michael.
I found out that my php5 has exslt support.
Tough i can't seem to figure out how it works.
I have 1 stylesheet ('main') wich includes another stylesheet ('forms').
In both stylesheets i have put this line of code :

Code:

xmlns:exsl="http://exslt.org/common"
extension-element-prefixes="exsl"

inside the xsl:stylesheet element.
My for-each element looks like this now :

Code:

<xsl:for-each select="exsl:node-set($options)/option">

Wich doesn't seem to work, all my errors are gone, tough in my output there are no 'options' in the 'selectbox'. I tried a lot to get this to work, but the best i got was this line:

Code:

<xsl:for-each select="exsl:node-set($options)/*">

wich produces 2 'options' in the 'selectbox', tough there is no 'name' nor a 'value' in the option.

I read the exslt.org website, but i think i did everthing they said.
On php.net manual it states that someone used the prefix exslt instead of exsl, wich did the trick for them, but first of all i dont believe that and second it doesn't work for me.

RoeZ · November 1st, 2007, 05:37 AM

offtopic: Michael, on the exslt.org website it says this about supported processors:

SAXON from Michael Kay (version 6.3)

when i click this link i go here :

http://users.iclway.co.uk/mhkay/saxon/index.html

wich is a site that doesn't exist, maybe you should them them your link not working anymore

samjudson · November 1st, 2007, 05:53 AM

The latest versions of SAXON are available here: http://saxon.sourceforge.net/

/- Sam Judson : Wrox Technical Editor -/

RoeZ · November 1st, 2007, 05:55 AM

i understand sam, i just was telling Michael that the link to his processor on the exslt site doesn't work, thanks anyway.

ontopic: anyone knows what i am doing wrong, 2 posts ago?

mhkay · November 1st, 2007, 06:53 PM

Please post a complete stylesheet and show the output you are getting from it.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference