XQuery

{
	"my-special-operation": {
		"steps": {
			"type": "operation/append-structure",
			"data": {
				"contextNodeId": "{{contextNodeId}}",
				"childNodeStructure": "x__import module namespace fonto = 'http://www.fontoxml.com/functions'; <someNewElement with='attributes'>And some text</someNewElement> => fonto:serialize-as-jsonml()"
			}
		}
	}
}

{
	"__moduleImports__": {
		"fonto": "http://www.fontoxml.com/functions"
	},
	"my-special-operation": {
		"steps": {
			"type": "operation/append-structure",
			"data": {
				"contextNodeId": "{{contextNodeId}}",
				"childNodeStructure": "x__<someNewElement with='attributes'>And some text</someElement> => fonto:serialize-as-jsonml()"
			}
		}
	}
}

module namespace fonto = "http://www.fontoxml.com/functions";

(: This is the implementation of fonto:serialize-as-jsonml in the platform. It recursively transforms DOM nodes to their JSONML notation. :)

declare %public function fonto:serialize-as-jsonml ($node as node()) as item() {
	if ($node/self::element()) then
		array {
			name($node),
			map:merge($node/attribute::node()/map:entry(name(.), string(.))),
			$node/child::node()/fonto:serialize-as-jsonml(.)
		}
	else if ($node/self::text()) then string($node)
	else if ($node/self::processing-instruction()) then ["?" || name($node), string($node)]
	else if ($node/self::comment()) then ["!", string($node)]
	else ()
};

module namespace docbook-editor = "http://www.fontoxml.com/editors/docbook";

(: Generate an XHTML table of the given dimensions :)

declare %public function docbook-editor:make-a-table ($height, $width) as element() {
	<table>{
		for $i in (1 to $height)
		return <tr>{
			(: This outputs a number of cells each containing the coordinates for the cell: "Cell at (1, 2)" :)
   			(1 to $width)!(<td><p>Cell at ({$i},{.})</p></td>)
    	}</tr>
	}</table>
};

{
	"__moduleImports__": {
		"docbook-editor": "http://www.fontoxml.com/editors/docbook",
		"fonto": "http://www.fontoxml.com/functions"
	},
	"my-special-operation": {
		"steps": {
			"type": "operation/append-structure",
			"data": {
				"contextNodeId": "{{contextNodeId}}",
				"childNodeStructure": "x__docbook-editor:make-a-table($data('height'), $data('width')) => fonto:serialize-as-jsonml()"
			}
		}
	}
}

module namespace docbook-editor = "http://www.fontoxml.com/editors/docbook";

(: Get the formatted number for the current section :)
declare %public function local:section-number ($node as element()) as xs:string {
	(: Recurse to the parent and add a "." separator, then generate the number for the current level and append that :)
	$node/parent::*/(local:section-number(.) || ".") || $node/preceding-sibling::section => count() + 1
};

import readOnlyBlueprint from 'fontoxml-blueprints/src/readOnlyBlueprint.js';
import evaluateXPathToString from 'fontoxml-selectors/src/evaluateXPathToString.js';

export default function createCustomWidget() {
    return function(sourceNode) {
        return [
            'cv-attribute-label-widget',
            evaluateXPathToString('import module namespace d= 'http://www.fontoxml.com/editors/docbook'; d:section-number(.)', sourceNode, readOnlyBlueprint)
        ];
    };
}