bitbake: toaster: migrate typeahead library

Migrate from Bootstrap 2's built-in typeahead to Twitter's
typeahead library.

This is to facilitate moving to Bootstrap 3, which doesn't have
a typeahead.

(Bitbake rev: 0748177b40188a6fb735fe1ba1c17294afa4a3d0)

Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/LICENSE

@@ -9,4 +9,6 @@ Foundation and individual contributors.
 
 * jQuery is redistributed under the MIT license.
 
+* Twitter typeahead.js redistributed under the MIT license.
+
 * QUnit is redistributed under the MIT license.

bitbake/lib/toaster/toastergui/static/css/default.css

@@ -341,3 +341,22 @@ input.input-lg {
   line-height: 1.33333;
   padding: 10px 16px;
 }
+
+/* styling for standalone typeahead library */
+.tt-menu {
+  margin-top: 2px;
+  border-radius: 4px;
+  width: 100%;
+}
+
+.tt-suggestion {
+  cursor: pointer;
+  overflow: hidden;
+  white-space: nowrap;
+  text-overflow: ellipsis;
+}
+
+.tt-suggestion.active {
+  background-color: #0081c2;
+  color: white;
+}

bitbake/lib/toaster/toastergui/static/js/libtoaster.js

@@ -3,96 +3,82 @@
  * This object really just helps readability since we can then have
  * a traceable namespace.
  */
-var libtoaster = (function (){
-
-  /* makeTypeahead parameters
-   * elementSelector: JQuery elementSelector string
-   * xhrUrl: the url to get the JSON from expects JSON in the form:
-   *  { "list": [ { "name": "test", "detail" : "a test thing"  }, .... ] }
+var libtoaster = (function () {
+  // prevent conflicts with Bootstrap 2's typeahead (required during
+  // transition from v2 to v3)
+  var typeahead = jQuery.fn.typeahead.noConflict();
+  jQuery.fn._typeahead = typeahead;
+
+  /* Make a typeahead from an input element
+   *
+   * _makeTypeahead parameters
+   * jQElement: input element as selected by $('selector')
+   * xhrUrl: the url to get the JSON from; this URL should return JSON in the
+   * format:
+   *   { "results": [ { "name": "test", "detail" : "a test thing"  }, ... ] }
    * xhrParams: the data/parameters to pass to the getJSON url e.g.
-   *  { 'type' : 'projects' } the text typed will be passed as 'search'.
-   *  selectedCB: function to call once an item has been selected one
-   *  arg of the item.
+   *   { 'type' : 'projects' }; the text typed will be passed as 'search'.
+   * selectedCB: function to call once an item has been selected; has
+   * signature selectedCB(item), where item is an item in the format shown
+   * in the JSON list above, i.e.
+   *   { "name": "name", "detail": "detail" }.
    */
-  function _makeTypeahead (jQElement, xhrUrl, xhrParams, selectedCB) {
-    if (!xhrUrl || xhrUrl.length === 0)
-      throw("No url to typeahead supplied");
+  function _makeTypeahead(jQElement, xhrUrl, xhrParams, selectedCB) {
+    if (!xhrUrl || xhrUrl.length === 0) {
+      throw("No url supplied for typeahead");
+    }
 
     var xhrReq;
 
-    jQElement.typeahead({
-        // each time the typeahead's choices change, a
-        // "typeahead-choices-change" event is fired with an object
-        // containing the available choices in a "choices" property
-        source: function(query, process){
+    jQElement._typeahead(
+      {
+        highlight: true,
+        classNames: {
+          open: "dropdown-menu",
+          cursor: "active"
+        }
+      },
+      {
+        source: function (query, syncResults, asyncResults) {
           xhrParams.search = query;
 
-          /* If we have a request in progress don't fire off another one*/
-          if (xhrReq)
+          // if we have a request in progress, cancel it and start another
+          if (xhrReq) {
             xhrReq.abort();
+          }
 
-          xhrReq = $.getJSON(xhrUrl, this.options.xhrParams, function(data){
+          xhrReq = $.getJSON(xhrUrl, xhrParams, function (data) {
             if (data.error !== "ok") {
-              console.log("Error getting data from server "+data.error);
+              console.error("Error getting data from server: " + data.error);
               return;
             }
 
             xhrReq = null;
 
-            jQElement.trigger("typeahead-choices-change", {choices: data.results});
-
-            return process(data.results);
+            asyncResults(data.results);
           });
         },
-        updater: function(item) {
-          var itemObj = this.$menu.find('.active').data('itemObject');
-          selectedCB(itemObj);
-          return item;
-        },
-        matcher: function(item) {
-          if (!item.hasOwnProperty('name')) {
-            console.log("Name property missing in data");
-            return 0;
-          }
 
-          if (this.$element.val().length === 0)
-            return 0;
-
-          return 1;
-        },
-        highlighter: function (item) {
-          /* Use jquery to escape the item name and detail */
-          var current = $("<span></span>").text(item.name + ' '+item.detail);
-          current = current.html();
-
-          var query = this.query.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, '\\$&')
-          return current.replace(new RegExp('(' + query + ')', 'ig'), function ($1, match) {
-            return '<strong>' + match + '</strong>'
-          })
+        // how the selected item is shown in the input
+        display: function (item) {
+          return item.name;
         },
-        sorter: function (items) { return items; },
-        xhrUrl: xhrUrl,
-        xhrParams: xhrParams,
-        xhrReq: xhrReq,
-    });
-
-
-    /* Copy of bootstrap's render func but sets selectedObject value */
-    function customRenderFunc (items) {
-      var that = this;
-
-      items = $(items).map(function (i, item) {
-        i = $(that.options.item).attr('data-value', item.name).data('itemObject', item);
-        i.find('a').html(that.highlighter(item));
-        return i[0];
-      });
 
-      items.first().addClass('active');
-      this.$menu.html(items);
-      return this;
-    }
+        templates: {
+          // how the item is displayed in the dropdown
+          suggestion: function (item) {
+            var elt = document.createElement("div");
+            elt.innerHTML = item.name + " " + item.detail;
+            return elt;
+          }
+        }
+      }
+    );
 
-    jQElement.data('typeahead').render = customRenderFunc;
+    // when an item is selected using the typeahead, invoke the callback
+    jQElement.on("typeahead:select", function (event, item) {
+      selectedCB(item);
+    });
   }
 
   /* startABuild:

bitbake/lib/toaster/toastergui/templates/base.html

@@ -21,6 +21,8 @@
     </script>
     <script src="{% static 'js/bootstrap.min.js' %}">
     </script>
+    <script src="{% static 'js/typeahead.jquery.min.js' %}">
+    </script>
     <script src="{% static 'js/prettify.js' %}">
     </script>
     <script src="{% static 'js/libtoaster.js' %}">