Added the variable modal and component and implemented basic renaming functionality. (#991)

accessible/variable-modal.service.js

@@ -0,0 +1,47 @@
+/**
+ * AccessibleBlockly
+ *
+ * Copyright 2017 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Angular2 Service for the variable modal.
+ *
+ * @author corydiers@google.com (Cory Diers)
+ */
+
+blocklyApp.VariableModalService = ng.core.Class({
+  constructor: [
+    function() {
+      this.modalIsShown = false;
+    }
+  ],
+  registerPreShowHook: function(preShowHook) {
+    this.preShowHook = function(oldName) {
+      preShowHook(oldName);
+    };
+  },
+  isModalShown: function() {
+    return this.modalIsShown;
+  },
+  showModal_: function(oldName) {
+    this.preShowHook(oldName);
+    this.modalIsShown = true;
+  },
+  hideModal: function() {
+    this.modalIsShown = false;
+  }
+});