Remove Equation References/Numbering, Fix Bugs

Equation References and Numbering are not going to be trivial to add,
so the code has been removed for now.  Important fixes include
no-MathJax support (previously, the code was failing), and the
generation of unique ids for the rendering content in each cell,
tremendously speeding up MathJax rendering.

I am still not rendering placeholder text.

IPython/frontend/html/notebook/static/js/cell.js

@@ -50,6 +50,9 b' var IPython = (function (IPython) {'
         });
     };
 
+    // prototype typeset method does nothing, see TextCell typeset
+    Cell.prototype.typeset = function () {
+    };
 
     Cell.prototype.select = function () {
         this.element.addClass('ui-widget-content ui-corner-all');

IPython/frontend/html/notebook/static/js/mathjaxutils.js

@@ -76,7 +76,6 b' IPython.mathjaxutils = (function (IPython) {'
     var inline = "$"; // the inline math delimiter
     var blocks, start, end, last, braces; // used in searching for math
     var math; // stores math until pagedown (Markdown parser) is done
-    var HUB = MathJax.Hub;
 
     // MATHSPLIT contains the pattern for math delimiters and special symbols
     // needed for searching for math in the text input.   
@@ -90,6 +89,7 b' IPython.mathjaxutils = (function (IPython) {'
     //    math, then push the math string onto the storage array.
     //  The preProcess function is called on all blocks if it has been passed in
     var process_math = function (i, j, pre_process) {
+        var HUB = MathJax.Hub;
         var block = blocks.slice(i, j + 1).join("").replace(/&/g, "&") // use HTML entity for &
         .replace(/</g, "&lt;") // use HTML entity for <
         .replace(/>/g, "&gt;") // use HTML entity for >
@@ -115,6 +115,10 b' IPython.mathjaxutils = (function (IPython) {'
     //    (which will be a paragraph).
     //
     var remove_math = function (text) {
+        if (!window.MathJax) {
+            return text;
+        }
+
         start = end = last = null; // for tracking math delimiters
         math = []; // stores math strings for later
         
@@ -204,6 +208,10 b' IPython.mathjaxutils = (function (IPython) {'
     //    and clear the math array (no need to keep it around).
     //  
     var replace_math = function (text) {
+        if (!window.MathJax) {
+            return text;
+        }
+
         text = text.replace(/@@(\d+)@@/g, function (match, n) {
             return math[n]
         });
@@ -211,27 +219,11 b' IPython.mathjaxutils = (function (IPython) {'
         return text;
     }
 
-    var queue_render = function () {
-        // see https://groups.google.com/forum/?fromgroups=#!topic/mathjax-users/cpwy5eCH1ZQ
-        var jax = MathJax.Hub.getAllJax();
-
-        MathJax.Hub.Queue( 
-           function () { 
-                if (MathJax.InputJax.TeX.resetEquationNumbers) { 
-                MathJax.InputJax.TeX.resetEquationNumbers(); 
-            } 
-          },
-          ["PreProcess",MathJax.Hub], 
-          ["Reprocess",MathJax.Hub] 
-          ); 
-    }
-
     return {
         init : init,
         process_math : process_math,
         remove_math : remove_math,
-        replace_math : replace_math,
-        queue_render : queue_render
+        replace_math : replace_math
     };
 
 }(IPython));
  No newline at end of file

IPython/frontend/html/notebook/static/js/textcell.js

@@ -39,9 +39,11 b' var IPython = (function (IPython) {'
             extraKeys: {"Tab": "indentMore","Shift-Tab" : "indentLess"},
             onKeyEvent: $.proxy(this.handle_codemirror_keyevent,this)
         });
+        this.cell_id = IPython.utils.uuid();
         // The tabindex=-1 makes this div focusable.
+        // id is a unique cell_id necessary for updating MathJax intelligently
         var render_area = $('<div/>').addClass('text_cell_render border-box-sizing').
-            addClass('rendered_html').attr('tabindex','-1');
+            addClass('rendered_html').attr('tabindex','-1').attr('id',this.cell_id);
         cell.append(input_area).append(render_area);
         this.element = cell;
     };
@@ -77,6 +79,13 b' var IPython = (function (IPython) {'
         return false;
     };
 
+    TextCell.prototype.typeset = function () {
+        if (window.MathJax){
+            var cell_math = document.getElementById(this.cell_id);
+            MathJax.Hub.Queue(["Typeset",MathJax.Hub,cell_math]);
+        }
+    };
+
 
     TextCell.prototype.select = function () {
         IPython.Cell.prototype.select.apply(this);
@@ -248,8 +257,7 b' var IPython = (function (IPython) {'
 
                     return '<code class="prettyprint">' + code + '</code>';
                 });
-
-                IPython.mathjaxutils.queue_render()
+                this.typeset()
             }
             this.rendered = true;
         }

IPython/frontend/html/notebook/templates/notebook.html

@@ -4,7 +4,6 b''
 {% if mathjax_url %}
 <script type="text/x-mathjax-config">
     MathJax.Hub.Config({
-        TeX: { equationNumbers: { autoNumber: "AMS", useLabelIds: true } },
         tex2jax: {
             inlineMath: [ ['$','$'], ["\\(","\\)"] ],
             displayMath: [ ['$$','$$'], ["\\[","\\]"] ],
@@ -17,7 +16,7 b''
         });
 </script>
 
-<script type="text/javascript" src="{{mathjax_url}}?config=TeX-AMS_HTML" charset="utf-8"></script>
+<script type="text/javascript" src="{{mathjax_url}}?config=TeX-AMS_HTML-full" charset="utf-8"></script>
 {% end %}
 <script type="text/javascript">
 // MathJax disabled, set as null to distingish from *missing* MathJax,

IPython/frontend/html/notebook/templates/printnotebook.html

@@ -5,7 +5,6 b''
 {% if mathjax_url %}
 <script type="text/x-mathjax-config">
     MathJax.Hub.Config({
-        TeX: { equationNumbers: { autoNumber: "AMS", useLabelIds: true } },
         tex2jax: {
             inlineMath: [ ['$','$'], ["\\(","\\)"] ],
             displayMath: [ ['$$','$$'], ["\\[","\\]"] ],
@@ -18,7 +17,7 b''
         });
 </script>
 
-<script type="text/javascript" src="{{mathjax_url}}?config=TeX-AMS_HTML" charset="utf-8"></script>
+<script type="text/javascript" src="{{mathjax_url}}?config=TeX-AMS_HTML-full" charset="utf-8"></script>
 {% end %}
 <script type="text/javascript">
 // MathJax disabled, set as null to distingish from *missing* MathJax,

docs/examples/notebooks/Typesetting Math Using MathJax.ipynb

@@ -162,87 +162,7 b''
       "\n",
       "---\n",
       "\n",
-      "These equation reference examples are adapted from an [example page in the MathJax documentation](http://cdn.mathjax.org/mathjax/latest/test/sample-eqrefs.html).  Note that it's okay to reference equations across cells.  Click inside this cell to see the source.\n",
-      "\n",
-      "## Labeled equations and references\n",
-      "\n",
-      "Here is a labeled equation:\n",
-      "\\begin{equation}\n",
-      "x+1\\over\\sqrt{1-x^2}\\label{ref1}\n",
-      "\\end{equation}\n",
-      "\n",
-      "with a reference to ref1: \\ref{ref1},\n",
-      "and another numbered one with no label:\n",
-      "\\begin{equation}\n",
-      "x+1\\over\\sqrt{1-x^2}\n",
-      "\\end{equation}"
-     ]
-    },
-    {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
-      "## \\nonumber and equation*\n",
-      "\n",
-      "This one uses \\nonumber:\n",
-      "\\begin{equation}\n",
-      "x+1\\over\\sqrt{1-x^2}\\nonumber\n",
-      "\\end{equation}\n",
-      "\n",
-      "Here's one with the equation* environment:\n",
-      "\\begin{equation*}\n",
-      "x+1\\over\\sqrt{1-x^2}\n",
-      "\\end{equation*}"
-     ]
-    },
-    {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
-      "## Forward references\n",
-      "\n",
-      "This is a forward reference [\\ref{ref2}] and another \\eqref{ref2} for the \n",
-      "following equation:\n",
-      "\n",
-      "\\begin{equation}\n",
-      "x+1\\over\\sqrt{1-x^2}\\label{ref2}\n",
-      "\\end{equation}\n",
-      "\n",
-      "More math:\n",
-      "\\begin{equation}\n",
-      "x+1\\over\\sqrt{1-x^2}\n",
-      "\\end{equation}"
-     ]
-    },
-    {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
-      "### References inline and in environments\n",
-      "\n",
-      "Here is a ref inside math: $\\ref{ref2}+1$ and text after it.\n",
-      "\n",
-      "\\begin{align} \n",
-      "x& = y_1-y_2+y_3-y_5+y_8-\\dots \n",
-      "&& \\text{by \\eqref{ref1}}\\\\ \n",
-      "& = y'\\circ y^* && \\text{(by \\eqref{ref3})}\\\\ \n",
-      "& = y(0) y' && \\text {by Axiom 1.} \n",
-      "\\end{align} \n",
-      "\n",
-      "### Missing references\n",
-      "Here's a bad ref [\\ref{ref4}] to a nonexistent label.\n",
-      "\n",
-      "### Numbering align environments\n",
-      "An alignment:\n",
-      "\\begin{align}\n",
-      "a&=b\\label{ref3}\\cr\n",
-      "&=c+d\n",
-      "\\end{align}\n",
-      "and a starred one:\n",
-      "\\begin{align*}\n",
-      "a&=b\\cr\n",
-      "&=c+d\n",
-      "\\end{align*}"
+      "Equation numbering and referencing will be available in a future version of IPython."
      ]
     },
     {