Issue 2879 - Restructure existing process script, split it up into multiple modules

lib/child/bootstrap.js

+/*
+ * This Source Code is subject to the terms of the Mozilla Public License
+ * version 2.0 (the "License"). You can obtain a copy of the License at
+ * http://mozilla.org/MPL/2.0/.
+ */
+
+"use strict";
+
+(function(messageManager)
+{
+  const Cc = Components.classes;
+  const Ci = Components.interfaces;
+  const Cr = Components.results;
+  const Cu = Components.utils;
+
+  let {Loader, main, unload} = Cu.import("resource://gre/modules/commonjs/toolkit/loader.js", {});
+  let {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
+
+  Cu.importGlobalProperties(["atob", "btoa", "File", "URL", "URLSearchParams",
+      "TextDecoder", "TextEncoder"]);
+
+  let shutdownHandlers = [];
+  let onShutdown =
+  {
+    done: false,
+    add: function(handler)
+    {
+      if (shutdownHandlers.indexOf(handler) < 0)
+        shutdownHandlers.push(handler);
+    },
+    remove: function(handler)
+    {
+      let index = shutdownHandlers.indexOf(handler);
+      if (index >= 0)
+        shutdownHandlers.splice(index, 1);
+    }
+  };
+
+  function init()
+  {
+    let url = new URL(Components.stack.filename);
+    let params = new URLSearchParams(url.search.substr(1));
+    let info = JSON.parse(params.get("info"));
+
+    let loader = Loader({
+      paths: {
+        "": info.addonRoot + "lib/"
+      },
+      globals: {
+        Components, Cc, Ci, Cu, Cr, atob, btoa, File, URL, URLSearchParams,
+        TextDecoder, TextEncoder, onShutdown
+      },
+      modules: {
+        info, messageManager
+      },
+      id: info.addonID
+    });
+    onShutdown.add(() => unload(loader, "disable"))
+
+    main(loader, "child/main");
+  }
+
+  function shutdown(message)
+  {
+    if (onShutdown.done)
+      return;
+
+    onShutdown.done = true;
+    for (let i = shutdownHandlers.length - 1; i >= 0; i --)
+    {
+      try
+      {
+        shutdownHandlers[i]();
+      }
+      catch (e)
+      {
+        Cu.reportError(e);
+      }
+    }
+    shutdownHandlers = null;
+  }
+
+  messageManager.addMessageListener("ElemHideHelper:Shutdown", shutdown);
+  onShutdown.add(() =>
+  {
+    messageManager.removeMessageListener("ElemHideHelper:Shutdown", shutdown);
+  });
+
+  init();
+})(this);