1 files changed, 89 insertions, 0 deletions
diff --git a/docs/js/search.js b/docs/js/search.js
new file mode 100644
index 000000000..63544d52f
--- /dev/null
+++ b/docs/js/search.js
@@ -0,0 +1,89 @@
+(function() {
+  var searchTerm = getQueryVariable('query');
+  function showMark(first, last) {
+      var res = "";
+      if ((first.length + last.length) <= 150) {
+        res = '<p class="result-text">' + first + "<mark>" + searchTerm + "</mark>" + last + '...</p></li>';
+      } else if (first.length > 150 && last.length > 150) {
+        res = '<p class="result-text">' + first.substring(first.length - 76, first.length - 1) + "<mark>" + searchTerm + "</mark>" + last.substring(0, 75) + '...</p></li>';
+      } else if (first.length > last.length) {
+        var lastLen = Math.min(last.length, 75);
+        var frstLen = Math.min(first.length, 150 - lastLen);
+        res = '<p class="result-text">' + first.substring(first.length - frstLen - 1, first.length - 1) + "<mark>" + searchTerm + "</mark>" + last.substring(0, 75) + '...</p></li>';
+      }
+      return res;
+  }
+
+  function displaySearchResults(results, store) {
+    var searchResults = document.getElementById('search-results');
+
+    if (results.length) { // Are there any results?
+      var appendString = '';
+
+      for (var i = 0; i < results.length; i++) {  // Iterate over the results
+        var item = store[results[i].ref];
+        appendString += '<li><a href="' + item.url + "?highlight=" + searchTerm + '"><h3>' + item.title + '</h3></a>';
+
+        var text = item.content.split(searchTerm)
+
+        if (text.length == 1) {
+          appendString += '<p class="result-text">' + item.content.substring(0, 150) + '...</p></li>';
+        }
+        else if (text.length == 2) {
+          appendString += showMark(text[0], text[1]);
+        }
+        else {
+          for (var j = 0; j < text.length - 1; j++) {
+            appendString += showMark(text[j], text[j+1]);
+          }
+        }
+      }
+
+      searchResults.innerHTML = appendString;
+    } else {
+      searchResults.innerHTML = '<li>No results found</li>';
+    }
+  }
+
+  function getQueryVariable(variable) {
+    var query = window.location.search.substring(1);
+    var vars = query.split('&');
+
+    for (var i = 0; i < vars.length; i++) {
+      var pair = vars[i].split('=');
+
+      if (pair[0] === variable) {
+        return decodeURIComponent(pair[1].replace(/\+/g, '%20'));
+      }
+    }
+  }
+
+  if (searchTerm) {
+    document.getElementById('search-box').setAttribute("value", searchTerm);
+    var idx = elasticlunr(function () {
+      this.addField('title'); // hits in title get a boost
+      this.addField('author');
+      this.addField('content');
+      this.setRef('id');
+    });
+
+    for (var key in window.store) { // Add the data to lunr
+      var author = (typeof window.store[key].author === 'undefined') ? "" : window.store[key].author;
+      idx.addDoc({
+        'id': key,
+        'title': window.store[key].title,
+        'author': author,
+        'content': window.store[key].content
+      });
+
+      var results = idx.search(searchTerm, {
+          fields: {
+              title:   { boost: 3 },
+              author:  { boost: 2 },
+              content: { boost: 1 }
+          }
+      }); // Get lunr to perform a search
+      displaySearchResults(results, window.store); // We'll write this in the next section
+    }
+  }
+})();