Accessible keyboard nav (#56)

* Allow key down to toggle sort

* fix(ui-grid-util): add out of sync changes

* fix(core): don't use keycode

src/js/core/directives/ui-grid-header-cell.js

@@ -338,21 +338,25 @@
 
             $scope.$on( '$destroy', dataChangeDereg );
 
-            $scope.handleClick = function(event) {
-              // If the shift key is being held down, add this column to the sort
-              var add = false;
-              if (event.shiftKey) {
-                add = true;
-              }
-
+            function applySort(add) {
               // Sort this column then rebuild the grid's rows
               uiGridCtrl.grid.sortColumn($scope.col, add)
                 .then(function () {
                   if (uiGridCtrl.columnMenuScope) { uiGridCtrl.columnMenuScope.hideMenu(); }
                   uiGridCtrl.grid.refresh();
                 }).catch(angular.noop);
+            }
+
+            $scope.handleClick = function(event) {
+              // If the shift key is being held down, add this column to the sort
+              applySort(event.shiftKey);
             };
 
+            $scope.handleKeyDown = function(event) {
+              if (event.key === 'Enter' || event.key === ' ') {
+                applySort(event.shiftKey);
+              }
+            };
 
             $scope.toggleMenu = function(event) {
               event.stopPropagation();

src/js/core/services/ui-grid-util.js

@@ -243,11 +243,11 @@ module.service('gridUtil', ['$log', '$window', '$document', '$http', '$templateC
       return columnName.replace(/_+/g, ' ')
         // Replace a completely all-capsed word with a first-letter-capitalized version
         .replace(/^[A-Z]+$/, function (match) {
-          return angular.lowercase(angular.uppercase(match.charAt(0)) + match.slice(1));
+          return match.toLowerCase();
         })
         // Capitalize the first letter of words
         .replace(/([\w\u00C0-\u017F]+)/g, function (match) {
-          return angular.uppercase(match.charAt(0)) + match.slice(1);
+          return match.charAt(0).toUpperCase();
         })
         // Put a space in between words that have partial capilizations (i.e. 'firstName' becomes 'First Name')
         // .replace(/([A-Z]|[A-Z]\w+)([A-Z])/g, "$1 $2");
@@ -900,7 +900,7 @@ module.service('gridUtil', ['$log', '$window', '$document', '$http', '$templateC
 
 
   ['width', 'height'].forEach(function (name) {
-    var capsName = angular.uppercase(name.charAt(0)) + name.substr(1);
+    var capsName = name.charAt(0).toUpperCase() + name.substr(1);
     s['element' + capsName] = function (elem, extra) {
       var e = elem;
       if (e && typeof(e.length) !== 'undefined' && e.length) {