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[xsl] Positional grouping problem


Subject: [xsl] Positional grouping problem
From: Mark Peters <markpeters.work@xxxxxxxxx>
Date: Fri, 1 Feb 2013 13:40:52 -0500

Hi,

I've trying to group certain nodes in a flat MediaWiki ML file to
allow readers to show and hide the content. The grouping is based on
font sizes declared in a @style attribute, which have a uniform
structure across all content files.

Essentially, I'm trying to group each <div/> node where the @style
contains "14pt" with its following siblings. Some of the siblings have
other font sizes smaller than 14pt; others have no declared font sizes
because they wrap other nodes, such as tables.

Each grouping will have the following structure:

<div class="NavFrame"> [replaces <div style="font-size: 14pt;">]
        <div class="NavHead">Title</div> [replaces <span>Title</span>]
        <div class="NavContent">
                .. [following siblings of <div style="font-size: 14pt;">]
        </div>
</div>

Input:

<div style="margin-bottom: 15pt; margin-left: 20pt;"
xmlns="http://www.w3.org/1999/xhtml">
    <div style="blah" />
    <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
    <div style="font-size: 17pt;">
        <span>Page Title</span>
    </div>
    <hr />
    <div style="font-size: 14pt;">
        <span>Title</span>
    </div>
    <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
    <div style="margin-left: 5pt;">
        <table />
    </div>
    <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
    <div style="font-size: 14pt;">
        <span>Title</span>
    </div>
    <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
    <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
    <div style="margin-left: 5pt;">
        <table />
    </div>
</div>


Desired output:

<div style="margin-bottom: 15pt; margin-left: 20pt;"
xmlns="http://www.w3.org/1999/xhtml">
    <div style="blah" />
    <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
    <div style="font-size: 17pt;">
        <span>Page Title</span>
    </div>
    <hr />
    <div class="NavFrame">
        <div class="NavHead">Title</div>
        <div class="NavContent">
            <div style="font-family: sans-serif; font-size: 10pt;">
                <span>Text</span>
            </div>
            <div style="margin-left: 5pt;">
                <table />
            </div>
            <div style="font-family: sans-serif; font-size: 10pt;">
                <span>Text</span>
            </div>
        </div>
    </div>
    <div class="NavFrame">
        <div class="NavHead">Title</div>
        <div class="NavContent">
            <div style="font-family: sans-serif; font-size: 10pt;">
                <span>Text</span>
            </div>
            <div style="font-family: sans-serif; font-size: 10pt;">
                <span>Text</span>
            </div>
            <div style="margin-left: 5pt;">
                <table />
            </div>
        </div>
    </div>
</div>


Here's my draft stylesheet.

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:html="http://www.w3.org/1999/xhtml" version="2.0">
    <xsl:output indent="yes" include-content-type="no"
omit-xml-declaration="yes"/>
    <!-- This stylesheet ... -->
    <!-- Copy all elements and attributes from the source document -->
    <xsl:output indent="yes"/>

    <!-- Insert collabsible CSS classes into the .wiki topic files -->
    <xsl:template match="html:div[1]">
        <xsl:copy>
            <xsl:copy-of select="@*"/>
            <xsl:for-each-group select="*" group-starting-with="html:div[
contains(@style,'14pt')]">
                <div class="NavFrame">
                    <div class="NavHead">
                        <xsl:value-of select="span"/>
                    </div>
                    <div class="NavContent">
                        <xsl:apply-templates select="current-group()"/>
                    </div>
                </div>
            </xsl:for-each-group>
        </xsl:copy>
    </xsl:template>
</xsl:stylesheet>

And the current output:

<div xmlns="http://www.w3.org/1999/xhtml" style="margin-bottom: 15pt;
margin-left: 20pt;">
    <div xmlns="" xmlns:html="http://www.w3.org/1999/xhtml" class="NavFrame">
        <div class="NavHead"/>
        <div class="NavContent">
            <div xmlns="http://www.w3.org/1999/xhtml" style="blah"/>
        Text

        Page Title
    </div>
    </div>
    <div xmlns="" xmlns:html="http://www.w3.org/1999/xhtml" class="NavFrame">
        <div class="NavHead"/>
        <div class="NavContent">
        Title

        Text



        Text
    </div>
    </div>
    <div xmlns="" xmlns:html="http://www.w3.org/1999/xhtml" class="NavFrame">
        <div class="NavHead"/>
        <div class="NavContent">
        Title

        Text

        Text


    </div>
    </div>
</div>

The stylesheet currently inserts the <div class="NavFrame"/> node at
the beginning of the output file and also groups nodes where the
starting <div/> node/@style attribute doesn't contain "14pt" -- for
example, <div style="font-size: 17pt;">. Also, the output child nodes
contain text only.

Any help would be appreciated.

Thanks!

Mark

--
Senior technical writer
Saba Software, Inc.


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