1 files changed, 26 insertions, 0 deletions
diff --git a/toolkit/jetpack/framescript/manager.js b/toolkit/jetpack/framescript/manager.js
new file mode 100644
index 000000000..1f261e1fa
--- /dev/null
+++ b/toolkit/jetpack/framescript/manager.js
@@ -0,0 +1,26 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+module.metadata = {
+  "stability": "unstable"
+};
+
+const mime = "application/javascript";
+const requireURI = module.uri.replace("framescript/manager.js",
+                                      "toolkit/require.js");
+
+const requireLoadURI = `data:${mime},this["Components"].utils.import("${requireURI}")`
+
+// Loads module with given `id` into given `messageManager` via shared module loader. If `init`
+// string is passed, will call module export with that name and pass frame script environment
+// of the `messageManager` into it. Since module will load only once per process (which is
+// once for chrome proces & second for content process) it is useful to have an init function
+// to setup event listeners on each content frame.
+const loadModule = (messageManager, id, allowDelayed, init) => {
+  const moduleLoadURI = `${requireLoadURI}.require("${id}")`
+  const uri = init ? `${moduleLoadURI}.${init}(this)` : moduleLoadURI;
+  messageManager.loadFrameScript(uri, allowDelayed);
+};
+exports.loadModule = loadModule;