1 files changed, 67 insertions, 0 deletions
diff --git a/tools/addon-sdk-1.4/packages/api-utils/lib/channel.js b/tools/addon-sdk-1.4/packages/api-utils/lib/channel.js
new file mode 100644
index 0000000..b7f1e61
--- /dev/null
+++ b/tools/addon-sdk-1.4/packages/api-utils/lib/channel.js
@@ -0,0 +1,67 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (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.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Jetpack.
+ *
+ * The Initial Developer of the Original Code is Mozilla.
+ * Portions created by the Initial Developer are Copyright (C) 2011
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Irakli Gozalishvili <gozala@mozilla.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+const { jetpackID } = require('@packaging');
+
+// TODO: Create a bug report and remove this workaround once it's fixed.
+// Only function needs defined in the context of the message manager window
+// can be registered via `addMessageListener`.
+function listener(callee) {
+  return function listener() { return callee.apply(this, arguments); };
+}
+function messageListener(scope, callee) {
+  return scope ? scope.eval('(' + listener + ')')(callee) : callee
+}
+
+exports.channel = function channel(scope, messageManager, address, raw) {
+  address = jetpackID + ':' + address
+  return {
+    input: function input(next, stop) {
+      let listener = messageListener(scope, function onMessage(message) {
+        if (false === next(raw ? message : message.json))
+          messageManager.removeMessageListener(address, listener);
+      });
+      messageManager.addMessageListener(address, listener);
+    },
+    output: function output(data) {
+      messageManager.sendAsyncMessage(address, data);
+    },
+    sync: !messageManager.sendSyncMessage ? null : function sync(data) {
+      messageManager.sendSyncMessage(address, data);
+    }
+  };
+};
+