Markdown links in Jupyter/IPython

main.js

// Allow sphinx rst references in markdown cells
// TODO: Markdown cells will only be reevaluated when a notebook is dirty
//       (i.e. you have made changes). If you save it before reevaluating MD cells,
//       they will show the old value.

define([
    'base/js/namespace',
    'jquery',
    'notebook/js/cell',
    'base/js/security',
    'components/marked/lib/marked',
    'base/js/events',
    'notebook/js/textcell'
], function(IPython, $, cell, security, marked, events,textcell) {
    "use strict";

    /*
     * Find Sphinx expressions and add to text as <a href> tags
     *
     * @method execute_sphinx
     * @param cell {Cell} notebook cell
     * @param text {String} text in cell
     */
    var execute_sphinx = function(cell,text) {
        /* always clear stored variables if notebook is dirty */
        if (IPython.notebook.dirty === true ) delete cell.metadata.sphinx_links;

        // search for code in mangled <code> blocks
    var found = false;
        var newtext = text.replace(/:ref:<code>(.*?)\s*&lt;(.*?)\&gt;<\/code>/g, function(match, info, link, cha){
             found = true;
             link = link.replace(/\.html$/, '');
             if (link.indexOf('.') == -1) {
                link = link + ".ipynb";
             }
             console.log(link);
             return '<a href="' + link + '" target=_new>' + info + '</a>';
        });
    if (found) {
            if (typeof cell.metadata.sphinx_links === "undefined") {
                cell.metadata.sphinx_links = {any: true}
            }
    }
    return newtext

    };

    /*
     * Render markdown cell and replace {{...}} with python code
     *
     */
    var render_cell = function(cell) {
        var element = cell.element.find('div.text_cell_render');
        var text = execute_sphinx(cell, element[0].innerHTML);
        if (text !== undefined) {
            element[0].innerHTML = text;
            MathJax.Hub.Queue(["Typeset",MathJax.Hub,element[0]]);
        }
    };

    /* force rendering of markdown cell if notebook is dirty */
    var original_render = textcell.MarkdownCell.prototype.render;
    textcell.MarkdownCell.prototype.render = function() {
        if (IPython.notebook.dirty === true) {
            this.rendered = false
        }
        return original_render.apply(this)
    };

    var load_ipython_extension = function() {
        events.on("rendered.MarkdownCell", function (event, data) {
            render_cell(data.cell)
        });

        /* show values stored in metadata on reload */
        events.on("kernel_ready.Kernel", function () {
        var ncells = IPython.notebook.ncells();
        var cells = IPython.notebook.get_cells();
        for (var i = 0; i < ncells; i++) {
            var cell = cells[i];
            if (cell.metadata.hasOwnProperty('sphinx_links')) {
            render_cell(cell);
            }
        }
        });
    };

    return {
        load_ipython_extension : load_ipython_extension
    };
});