private String createElementLinkURL()

in freemarker-docgen-core/src/main/java/org/freemarker/docgen/core/Transform.java [2416:2476]
52 lines of code
14 McCabe index (conditional complexity)

    private String createElementLinkURL(final Element elem) {
        if (elem.hasAttribute(A_DOCGEN_NOT_ADDRESSABLE)) {
            return null;
        }

        String extLink = getExternalLinkTOCNodeURLOrNull(elem);
        if (extLink != null) {
            return extLink;
        }

        // Find the closest id:
        String id = null;
        Node node = elem;
        while (node != null) {
            if (node instanceof Element) {
                id = XMLUtil.getAttribute((Element) node, "id");
                if (id != null) {
                    break;
                }
            }
            node = node.getParentNode();
        }
        if (id == null) {
            throw new DocgenException(
                    "Can't create link for the \"" + elem.getLocalName()
                    + "\" element: Nor this element nor its ascendants have an "
                    + "id.");
        }
        final Element idElem = (Element) node;

        String fileName = null;
        Element curElem = idElem;
        do {
            TOCNode fileTOCNode = getFileTOCNodeFor(curElem);
            if (fileTOCNode == null) {
                curElem = (Element) curElem.getParentNode();
            } else {
                fileName = fileTOCNode.getOutputFileName();
                if (fileName == null) throw new IllegalStateException("fileTOCNode with null outputFileName");
            }
        } while (fileName == null);

        String link;
        if (currentFileTOCNode != null
                && fileName.equals(currentFileTOCNode.getOutputFileName())) {
            link = "";
        } else {
            link = fileName;
        }

        if (getFileTOCNodeFor(idElem) == null) {
            link = link + "#" + id;
        }

        // IE6 doesn't like empty href-s:
        if (link.length() == 0) {
            link = fileName;
        }

        return link;
    }