setitagila-informer-webext-ff/popup/jsonToDOM.js

jsonToDOM.namespaces = {
    html: "http://www.w3.org/1999/xhtml",
    xul: "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
};
jsonToDOM.defaultNamespace = jsonToDOM.namespaces.html;

function jsonToDOM(xml, doc, nodes) {
    function namespace(name) {
        var reElemNameParts = /^(?:(.*):)?(.*)$/.exec(name);
        return { namespace: jsonToDOM.namespaces[reElemNameParts[1]], shortName: reElemNameParts[2] };
    }

    function tag(elemNameOrArray, elemAttr) {
        if (Array.isArray(elemNameOrArray)) {
            var frag = doc.createDocumentFragment();
            Array.prototype.forEach.call(arguments, function(thisElem) {
                frag.appendChild(tag.apply(null, thisElem));
            });
            return frag;
        }

        var elemNs = namespace(elemNameOrArray);
        var elem = doc.createElementNS(elemNs.namespace || jsonToDOM.defaultNamespace, elemNs.shortName);

        for (var key in elemAttr) {
            var val = elemAttr[key];
            if (nodes && key == "key") {
                nodes[val] = elem;
                continue;
            }

            var attrNs = namespace(key);
            if (typeof val == "function") {
                elem.addEventListener(key.replace(/^on/, ""), val, false);
            } else {
                elem.setAttributeNS(attrNs.namespace || "", attrNs.shortName, val);
            }
        }

		var childElems = Array.prototype.slice.call(arguments, 2);
        childElems.forEach(function(childElem) {
            if (childElem != null) {
                elem.appendChild(
                    typeof childElem == "object" ? tag.apply(null, childElem) :
                        childElem instanceof Node ? childElem :
                            doc.createTextNode(childElem)
                );
            }
        });

        return elem;
    }
    return tag.apply(null, xml);
}