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-rw-r--r--addon-sdk/source/lib/framescript/util.js25
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diff --git a/addon-sdk/source/lib/framescript/util.js b/addon-sdk/source/lib/framescript/util.js
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+++ b/addon-sdk/source/lib/framescript/util.js
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+/* 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 { Ci } = require("chrome");
+
+const windowToMessageManager = window =>
+ window.
+ QueryInterface(Ci.nsIInterfaceRequestor).
+ getInterface(Ci.nsIDocShell).
+ sameTypeRootTreeItem.
+ QueryInterface(Ci.nsIDocShell).
+ QueryInterface(Ci.nsIInterfaceRequestor).
+ getInterface(Ci.nsIContentFrameMessageManager);
+exports.windowToMessageManager = windowToMessageManager;
+
+const nodeToMessageManager = node =>
+ windowToMessageManager(node.ownerDocument.defaultView);
+exports.nodeToMessageManager = nodeToMessageManager;