Merge pull request #2464 from iguananaut/nb-out-links

Locate URLs in notebook text output and convert them to hyperlinks.

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

@@ -379,8 +379,10 @@ var IPython = (function (IPython) {
     OutputArea.prototype.append_text = function (data, element, extra_class) {
         var toinsert = $("<div/>").addClass("box-flex1 output_subarea output_text");
         // escape ANSI & HTML specials in plaintext:
+        data = utils.wrapUrls(data);
         data = utils.fixConsole(data);
         data = utils.fixCarriageReturn(data);
+        data = utils.autoLinkUrls(data);
         if (extra_class){
             toinsert.addClass(extra_class);
         }

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

@@ -200,6 +200,24 @@ IPython.utils = (function (IPython) {
         return txt;
     }
 
+    // Locate URLs in plain text and wrap them in spaces so that they can be
+    // better picked out by autoLinkUrls even after the text has been
+    // converted to HTML
+    function wrapUrls(txt) {
+        // Note this regexp is a modified version of one from
+        // Markdown.Converter For now it only supports http(s) and ftp URLs,
+        // but could easily support others (though file:// should maybe be
+        // avoided)
+        var url_re = /(^|\W)(https?|ftp)(:\/\/[-A-Z0-9+&@#\/%?=~_|\[\]\(\)!:,\.;]*[-A-Z0-9+&@#\/%=~_|\[\]])($|\W)/gi;
+        return txt.replace(url_re, "$1 $2$3 $4");
+    }
+
+    // Locate a URL with spaces around it and convert that to a anchor tag
+    function autoLinkUrls(txt) {
+        return txt.replace(/ ((https?|ftp):[^'">\s]+) /gi,
+            "<a target=\"_blank\" href=\"$1\">$1</a>");
+    }
+
     grow = function(element) {
         // Grow the cell by hand. This is used upon reloading from JSON, when the
         // autogrow handler is not called.
@@ -261,6 +279,8 @@ IPython.utils = (function (IPython) {
         keycodes : keycodes,
         grow : grow,
         fixCarriageReturn : fixCarriageReturn,
+        wrapUrls : wrapUrls,
+        autoLinkUrls : autoLinkUrls,
         points_to_pixels : points_to_pixels
     };