Merge pull request #717 from stefanv/htmlnotebook_highlight_markdown

Add source highlighting to markdown snippets, with a theme matching the CodeMirror one we use.

This only highlights source code in blocks that are indented 4 spaces in markdown cells, leaving <pre> blocks alone.  If highlight is desired in <pre> blocks, a further <code> block must be created.

The visual theme matches the one used for CodeMirror as much as possible.

IPython/frontend/html/notebook/static/prettify/COPYING

@@ -0,0 +1,202 b''
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IPython/frontend/html/notebook/static/prettify/prettify.css

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+.pln{
+    color:#000
+}
+
+@media screen{
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+
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+    padding:2px;
+    border:1px solid #888
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IPython/frontend/html/notebook/static/prettify/prettify.js

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

@@ -202,6 +202,18 b' var IPython = (function (IPython) {'
             MathJax.Hub.Queue(["Typeset",MathJax.Hub]);
             this.element.find('div.text_cell_input').hide();
             this.element.find("div.text_cell_render").show();
+            var code_snippets = this.element.find("pre > code");
+            code_snippets.replaceWith(function () {
+                var code = $(this).html();
+                /* Substitute br for newlines and   for spaces
+                   before highlighting, since prettify doesn't
+                   preserve those on all browsers */
+                code = code.replace(/(\r\n|\n|\r)/gm, "<br/>");
+                code = code.replace(/ /gm, '&nbsp;');
+                code = prettyPrintOne(code);
+
+                return '<code class="prettyprint">' + code + '</code>';
+            });
             this.rendered = true;
         };
     };

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

@@ -24,6 +24,8 b''
     <link rel="stylesheet" href="static/codemirror-2.12/theme/ipython.css">
     <link rel="stylesheet" href="static/codemirror-2.12/theme/default.css">
 
+    <link rel="stylesheet" href="static/prettify/prettify.css"/>
+
     <link rel="stylesheet" href="static/css/boilerplate.css" type="text/css" />
     <link rel="stylesheet" href="static/css/layout.css" type="text/css" />
     <link rel="stylesheet" href="static/css/base.css" type="text/css" />
@@ -214,6 +216,8 b''
 
 <script src="static/pagedown/Markdown.Converter.js" charset="utf-8"></script>
 
+<script src="static/prettify/prettify.js" charset="utf-8"></script>
+
 <script src="static/js/namespace.js" type="text/javascript" charset="utf-8"></script>
 <script src="static/js/utils.js" type="text/javascript" charset="utf-8"></script>
 <script src="static/js/cell.js" type="text/javascript" charset="utf-8"></script>