Freemind to JSON to Protovis xlst transformation draft - xslt

Question

I have a very simple taxonomy I'm editing in freemind, and want to visualize it in protovis as a sunburst visualisation. The depth of the taxonomy is unknown.
I've produced an attempt to built a XLST transformation that can be used with Freemind's export via xsl script functionality - to output data in the exact JSON format needed by Protovis to produce a sunburst - the idea being no further transforms are needed in javascript.
An example of the output JSON format I'm looking for is here:
http://mbostock.github.com/protovis/ex/sunburst.html
Effectively the freemind .mm file format is the input.
Running my alpha code (shown below) in stylus studio builds up a json format (badly formatted but seems legal) which feeds protovis ok when I save the output generated from stylus studio directly to a .js file manually. For some reason Freemind doesn't seem to export data using this code though...
Is there something I'm missing?
Any help appreciated.
Many thanks, Andrew
===========UPDATE=============
I've corrected the code, the problem was that some of my xsl wasn't supported by the xslt engine used by freemind. I corrected the code and moved it to github under a liberal license and removed it from here.
The adaptor is available here:
https://github.com/minkymorgan/Freemind2JSON#readme
Andrew

Answer 1

Here is my attempt. I based it of your version, and added a few more features.
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>
<xsl:template match="/map">
<xsl:text>var Map = {
</xsl:text>
<xsl:apply-templates select="node">
<xsl:with-param name="indent">
<xsl:text> </xsl:text>
</xsl:with-param>
</xsl:apply-templates>
<xsl:text>
};
</xsl:text>
</xsl:template>
<xsl:template match="node">
<xsl:param name="indent"/>
<xsl:if test="position() != 1">
<xsl:text>,
</xsl:text>
</xsl:if>
<xsl:value-of select="$indent"/>
<xsl:text>"</xsl:text>
<xsl:call-template name="escape-javascript">
<xsl:with-param name="string"
select="descendant-or-self::node/#TEXT"/>
</xsl:call-template>
<xsl:text>": </xsl:text>
<xsl:choose>
<xsl:when test="node">
<xsl:text>{
</xsl:text>
<xsl:apply-templates select="node">
<xsl:with-param name="indent">
<xsl:value-of select="$indent"/>
<xsl:text> </xsl:text>
</xsl:with-param>
</xsl:apply-templates>
<xsl:text>
</xsl:text>
<xsl:value-of select="$indent"/>
<xsl:text>}</xsl:text>
</xsl:when>
<xsl:otherwise>
<xsl:text>10</xsl:text>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<!--
Javascript string escape template by Jeni Tennison
Source: http://holytshirt.blogspot.com/2008/06/xslt-javascript-escaping.html
Author page: http://www.jenitennison.com/
-->
<xsl:template name="escape-javascript">
<xsl:param name="string" />
<xsl:choose>
<xsl:when test='contains($string, "&apos;")'>
<xsl:call-template name="escape-javascript">
<xsl:with-param name="string"
select='substring-before($string, "&apos;")' />
</xsl:call-template>
<xsl:text>\'</xsl:text>
<xsl:call-template name="escape-javascript">
<xsl:with-param name="string"
select='substring-after($string, "&apos;")' />
</xsl:call-template>
</xsl:when>
<xsl:when test="contains($string, '
')">
<xsl:call-template name="escape-javascript">
<xsl:with-param name="string"
select="substring-before($string, '
')" />
</xsl:call-template>
<xsl:text>\n</xsl:text>
<xsl:call-template name="escape-javascript">
<xsl:with-param name="string"
select="substring-after($string, '
')" />
</xsl:call-template>
</xsl:when>
<xsl:when test="contains($string, '\')">
<xsl:value-of select="substring-before($string, '\')" />
<xsl:text>\\</xsl:text>
<xsl:call-template name="escape-javascript">
<xsl:with-param name="string"
select="substring-after($string, '\')" />
</xsl:call-template>
</xsl:when>
<xsl:otherwise><xsl:value-of select="$string" /></xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
If run on the Freemind test file, it produces the following output:
var Map = {
"Notetest": {
"Notetest": 10,
"This is a node": {
"with a linbreak \n subnode": 10,
"and another subnode": 10,
"and some folded subnodes": {
"fold1": 10,
"fold2": 10,
"fold3": 10
}
},
"Attributes": 10
}
};

Answer 2

In case it's of interest ... I've just pushed an XSLT script for converting FreeMind to JSON.
My script is a bit simpler and does not yet support Javascript escaping.
It's also not designed for use in Protovis
https://github.com/tohagan/freemind-to-json