var xmlParse = function()

in JSLib/src/xml.js [173:226]
39 lines of code
17 McCabe index (conditional complexity)

    var xmlParse = function (text) {
        /// <summary>Returns an XML DOM document from the specified text.</summary>
        /// <param name="text" type="String">Document text.</param>
        /// <returns>XML DOM document.</returns>
        /// <remarks>This function will throw an exception in case of a parse error.</remarks>

        var domParser = window.DOMParser && new window.DOMParser();
        var dom;

        if (!domParser) {
            dom = msXmlParse(text);
            if (!dom) {
                xmlThrowParserError("XML DOM parser not supported");
            }
            return dom;
        }

        try {
            dom = domParser.parseFromString(text, "text/xml");
        } catch (e) {
            xmlThrowParserError(e, "", text);
        }

        var element = dom.documentElement;
        var nsURI = element.namespaceURI;
        var localName = xmlLocalName(element);

        // Firefox reports errors by returing the DOM for an xml document describing the problem.
        if (localName === "parsererror" && nsURI === mozillaParserErroNS) {
            var srcTextElement = xmlFirstChildElement(element, mozillaParserErroNS, "sourcetext");
            var srcText = srcTextElement ? xmlNodeValue(srcTextElement) : "";
            xmlThrowParserError(xmlInnerText(element) || "", srcText, text);
        }

        // Chrome (and maybe other webkit based browsers) report errors by injecting a header with an error message.
        // The error may be localized, so instead we simply check for a header as the
        // top element or descendant child of the document.
        if (localName === "h3" && nsURI === xhtmlNS || xmlFirstDescendantElement(element, xhtmlNS, "h3")) {
            var reason = "";
            var siblings = [];
            var cursor = element.firstChild;
            while (cursor) {
                if (cursor.nodeType === 1) {
                    reason += xmlInnerText(cursor) || "";
                }
                siblings.push(cursor.nextSibling);
                cursor = cursor.firstChild || siblings.shift();
            }
            reason += xmlInnerText(element) || "";
            xmlThrowParserError(reason, "", text);
        }

        return dom;
    };