1 files changed, 64 insertions, 0 deletions
diff --git a/toolkit/components/formautofill/FormAutofillStartup.js b/toolkit/components/formautofill/FormAutofillStartup.js
new file mode 100644
index 000000000..92887f872
--- /dev/null
+++ b/toolkit/components/formautofill/FormAutofillStartup.js
@@ -0,0 +1,64 @@
+/* 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/. */
+
+/*
+ * Handles startup in the parent process.
+ */
+
+"use strict";
+
+const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "FormAutofill",
+                                  "resource://gre/modules/FormAutofill.jsm");
+
+/**
+ * Handles startup in the parent process.
+ */
+function FormAutofillStartup() {
+}
+
+FormAutofillStartup.prototype = {
+  classID: Components.ID("{51c95b3d-7431-467b-8d50-383f158ce9e5}"),
+  QueryInterface: XPCOMUtils.generateQI([
+    Ci.nsIFrameMessageListener,
+    Ci.nsIObserver,
+    Ci.nsISupportsWeakReference,
+  ]),
+
+  // nsIObserver
+  observe: function (aSubject, aTopic, aData) {
+    // This method is called by the "profile-after-change" category on startup,
+    // which is called before any web page loads.  At this time, we need to
+    // register a global message listener in the parent process preemptively,
+    // because we can receive requests from child processes at any time.  For
+    // performance reasons, we use this object as a message listener, so that we
+    // don't have to load the FormAutoFill module at startup.
+    let globalMM = Cc["@mozilla.org/globalmessagemanager;1"]
+                     .getService(Ci.nsIMessageListenerManager);
+    globalMM.addMessageListener("FormAutofill:RequestAutocomplete", this);
+  },
+
+  // nsIFrameMessageListener
+  receiveMessage: function (aMessage) {
+    // Process the "FormAutofill:RequestAutocomplete" message.  Any exception
+    // raised in the parent process is caught and serialized into the reply
+    // message that is sent to the requesting child process.
+    FormAutofill.processRequestAutocomplete(aMessage.data)
+      .catch(ex => { return { exception: ex } })
+      .then(result => {
+        // The browser message manager in the parent will send the reply to the
+        // associated frame message manager in the child.
+        let browserMM = aMessage.target.messageManager;
+        browserMM.sendAsyncMessage("FormAutofill:RequestAutocompleteResult",
+                                   result);
+      })
+      .catch(Cu.reportError);
+  },
+};
+
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory([FormAutofillStartup]);