Freemind to JSON to Protovis xlst transformation draft

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, '&#xA;')">
                <xsl:call-template name="escape-javascript">
                    <xsl:with-param name="string"
                        select="substring-before($string, '&#xA;')" />
                </xsl:call-template>
                <xsl:text>\n</xsl:text>
                <xsl:call-template name="escape-javascript">
                    <xsl:with-param name="string"
                        select="substring-after($string, '&#xA;')" />
                </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