From 46e4768971aca79d2d106ffdc1137f058fd3e759 Mon Sep 17 00:00:00 2001
From: Robin Ward <robin.ward@gmail.com>
Date: Thu, 18 Feb 2016 11:57:28 -0500
Subject: [PATCH] FIX: `highlight.js` is used, but for highlighting text, not
 code.

---
 app/assets/javascripts/vendor.js       |   1 +
 vendor/assets/javascripts/highlight.js | 109 +++++++++++++++++++++++++
 2 files changed, 110 insertions(+)
 create mode 100644 vendor/assets/javascripts/highlight.js

diff --git a/app/assets/javascripts/vendor.js b/app/assets/javascripts/vendor.js
index d2143d32017..5d6d3e6d2eb 100644
--- a/app/assets/javascripts/vendor.js
+++ b/app/assets/javascripts/vendor.js
@@ -40,4 +40,5 @@
 //= require jquery.autoellipsis-1.0.10.min.js
 //= require virtual-dom
 //= require virtual-dom-amd
+//= require highlight.js
 //= require_tree ./discourse/ember
diff --git a/vendor/assets/javascripts/highlight.js b/vendor/assets/javascripts/highlight.js
new file mode 100644
index 00000000000..0a6b9e0b271
--- /dev/null
+++ b/vendor/assets/javascripts/highlight.js
@@ -0,0 +1,109 @@
+// forked cause we may want to amend the logic a bit
+/*
+ * jQuery Highlight plugin
+ *
+ * Based on highlight v3 by Johann Burkard
+ * http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html
+ *
+ * Code a little bit refactored and cleaned (in my humble opinion).
+ * Most important changes:
+ *  - has an option to highlight only entire words (wordsOnly - false by default),
+ *  - has an option to be case sensitive (caseSensitive - false by default)
+ *  - highlight element tag and class names can be specified in options
+ *
+ * Usage:
+ *   // wrap every occurrance of text 'lorem' in content
+ *   // with <span class='highlight'> (default options)
+ *   $('#content').highlight('lorem');
+ *
+ *   // search for and highlight more terms at once
+ *   // so you can save some time on traversing DOM
+ *   $('#content').highlight(['lorem', 'ipsum']);
+ *   $('#content').highlight('lorem ipsum');
+ *
+ *   // search only for entire word 'lorem'
+ *   $('#content').highlight('lorem', { wordsOnly: true });
+ *
+ *   // don't ignore case during search of term 'lorem'
+ *   $('#content').highlight('lorem', { caseSensitive: true });
+ *
+ *   // wrap every occurrance of term 'ipsum' in content
+ *   // with <em class='important'>
+ *   $('#content').highlight('ipsum', { element: 'em', className: 'important' });
+ *
+ *   // remove default highlight
+ *   $('#content').unhighlight();
+ *
+ *   // remove custom highlight
+ *   $('#content').unhighlight({ element: 'em', className: 'important' });
+ *
+ *
+ * Copyright (c) 2009 Bartek Szopka
+ *
+ * Licensed under MIT license.
+ *
+ */
+
+jQuery.extend({
+    highlight: function (node, re, nodeName, className) {
+        if (node.nodeType === 3) {
+            var match = node.data.match(re);
+            if (match) {
+                var highlight = document.createElement(nodeName || 'span');
+                highlight.className = className || 'highlight';
+                var wordNode = node.splitText(match.index);
+                wordNode.splitText(match[0].length);
+                var wordClone = wordNode.cloneNode(true);
+                highlight.appendChild(wordClone);
+                wordNode.parentNode.replaceChild(highlight, wordNode);
+                return 1; //skip added node in parent
+            }
+        } else if ((node.nodeType === 1 && node.childNodes) && // only element nodes that have children
+                !/(script|style)/i.test(node.tagName) && // ignore script and style nodes
+                !(node.tagName === nodeName.toUpperCase() && node.className === className)) { // skip if already highlighted
+            for (var i = 0; i < node.childNodes.length; i++) {
+                i += jQuery.highlight(node.childNodes[i], re, nodeName, className);
+            }
+        }
+        return 0;
+    }
+});
+
+jQuery.fn.unhighlight = function (options) {
+    var settings = { className: 'highlight-strong', element: 'span' };
+    jQuery.extend(settings, options);
+
+    return this.find(settings.element + "." + settings.className).each(function () {
+        var parent = this.parentNode;
+        parent.replaceChild(this.firstChild, this);
+        parent.normalize();
+    }).end();
+};
+
+jQuery.fn.highlight = function (words, options) {
+    var settings = { className: 'highlight-strong', element: 'span', caseSensitive: false, wordsOnly: false };
+    jQuery.extend(settings, options);
+
+    if (words.constructor === String) {
+        words = [words];
+    }
+    words = jQuery.grep(words, function(word){
+      return word !== '';
+    });
+    words = jQuery.map(words, function(word) {
+      return word.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
+    });
+    if (words.length === 0) { return this; }
+
+    var flag = settings.caseSensitive ? "" : "i";
+    var pattern = "(" + words.join("|") + ")";
+    if (settings.wordsOnly) {
+        pattern = "\\b" + pattern + "\\b";
+    }
+    var re = new RegExp(pattern, flag);
+
+    return this.each(function () {
+        jQuery.highlight(this, re, settings.element, settings.className);
+    });
+};
+