1 files changed, 46 insertions, 0 deletions
diff --git a/blockly/accessible/notifications.service.js b/blockly/accessible/notifications.service.js
new file mode 100644
index 0000000..ad5af84
--- /dev/null
+++ b/blockly/accessible/notifications.service.js
@@ -0,0 +1,46 @@
+/**
+ * AccessibleBlockly
+ *
+ * Copyright 2016 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 that notifies the user about actions that
+ * they have taken, by updating an ARIA live region.
+ * @author sll@google.com (Sean Lip)
+ */
+
+blocklyApp.NotificationsService = ng.core
+  .Class({
+    constructor: [function() {
+      this.statusMessage_ = '';
+    }],
+    getStatusMessage: function() {
+      return this.statusMessage_;
+    },
+    setStatusMessage: function(newMessage) {
+      // Introduce a temporary status message, so that if, e.g., two "copy"
+      // operations are done in succession, both messages will be read.
+      this.statusMessage_ = '';
+
+      // We need a non-zero timeout here, otherwise NVDA does not read the
+      // notification messages properly.
+      var that = this;
+      setTimeout(function() {
+        that.statusMessage_ = newMessage;
+      }, 20);
+    }
+  });