Bug 889157 - Uplift Add-on SDK to Firefox r=me

addon-sdk/source/lib/sdk/content/utils.js

@@ -0,0 +1,43 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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"
+};
+
+let assetsURI = require("../self").data.url();
+let isArray = Array.isArray;
+
+function isAddonContent({ contentURL }) {
+  return typeof(contentURL) === "string" && contentURL.indexOf(assetsURI) === 0;
+}
+exports.isAddonContent = isAddonContent;
+
+function hasContentScript({ contentScript, contentScriptFile }) {
+  return (isArray(contentScript) ? contentScript.length > 0 :
+         !!contentScript) ||
+         (isArray(contentScriptFile) ? contentScriptFile.length > 0 :
+         !!contentScriptFile);
+}
+exports.hasContentScript = hasContentScript;
+
+function requiresAddonGlobal(model) {
+  return isAddonContent(model) && !hasContentScript(model);
+}
+exports.requiresAddonGlobal = requiresAddonGlobal;
+
+function getAttachEventType(model) {
+  if (!model) return null;
+  let when = model.contentScriptWhen;
+  return requiresAddonGlobal(model) ? "document-element-inserted" :
+         when === "start" ? "document-element-inserted" :
+         when === "end" ? "load" :
+         when === "ready" ? "DOMContentLoaded" :
+         null;
+}
+exports.getAttachEventType = getAttachEventType;
+