Add "check for updates" to main menu and AppMenu v2

Tag #963.

application/palemoon/base/content/utilityOverlay.js

@@ -541,6 +541,117 @@ function isBidiEnabled() {
   return rv;
 }
 
+#ifdef MOZ_UPDATER
+/**
+ * Opens the update manager and checks for updates to the application.
+ */
+function checkForUpdates()
+{
+  var um =
+      Components.classes["@mozilla.org/updates/update-manager;1"].
+      getService(Components.interfaces.nsIUpdateManager);
+  var prompter =
+      Components.classes["@mozilla.org/updates/update-prompt;1"].
+      createInstance(Components.interfaces.nsIUpdatePrompt);
+
+  // If there's an update ready to be applied, show the "Update Downloaded"
+  // UI instead and let the user know they have to restart the application for
+  // the changes to be applied.
+  if (um.activeUpdate && um.activeUpdate.state == "pending")
+    prompter.showUpdateDownloaded(um.activeUpdate);
+  else
+    prompter.checkForUpdates();
+}
+#endif
+
+/**
+ * Set up the help menu software update items to show proper status,
+ * also disabling the items if update is disabled.
+ */
+function buildHelpMenu()
+{
+#ifdef MOZ_UPDATER
+  var updates =
+      Components.classes["@mozilla.org/updates/update-service;1"].
+      getService(Components.interfaces.nsIApplicationUpdateService);
+  var um =
+      Components.classes["@mozilla.org/updates/update-manager;1"].
+      getService(Components.interfaces.nsIUpdateManager);
+
+  // Disable the UI if the update enabled pref has been locked by the
+  // administrator or if we cannot update for some other reason.
+  var checkForUpdates = document.getElementById("checkForUpdates");
+  var appMenuCheckForUpdates = document.getElementById("appmenu_checkForUpdates");
+  var canCheckForUpdates = updates.canCheckForUpdates;
+  checkForUpdates.setAttribute("disabled", !canCheckForUpdates);
+  appMenuCheckForUpdates.setAttribute("disabled", !canCheckForUpdates);
+  if (!canCheckForUpdates)
+    return;
+
+  var strings = document.getElementById("bundle_browser");
+  var activeUpdate = um.activeUpdate;
+
+  // If there's an active update, substitute its name into the label
+  // we show for this item, otherwise display a generic label.
+  function getStringWithUpdateName(key) {
+    if (activeUpdate && activeUpdate.name)
+      return strings.getFormattedString(key, [activeUpdate.name]);
+    return strings.getString(key + "Fallback");
+  }
+
+  // By default, show "Check for Updates..." from updatesItem_default or
+  // updatesItem_defaultFallback
+  var key = "default";
+  if (activeUpdate) {
+    switch (activeUpdate.state) {
+    case "downloading":
+      // If we're downloading an update at present, show the text:
+      // "Downloading Thunderbird x.x..." from updatesItem_downloading or
+      // updatesItem_downloadingFallback, otherwise we're paused, and show
+      // "Resume Downloading Thunderbird x.x..." from updatesItem_resume or
+      // updatesItem_resumeFallback
+      key = updates.isDownloading ? "downloading" : "resume";
+      break;
+    case "pending":
+      // If we're waiting for the user to restart, show: "Apply Downloaded
+      // Updates Now..." from updatesItem_pending or
+      // updatesItem_pendingFallback
+      key = "pending";
+      break;
+    }
+  }
+
+  checkForUpdates.label = getStringWithUpdateName("updatesItem_" + key);
+  appMenuCheckForUpdates.label = getStringWithUpdateName("updatesItem_" + key);
+  // updatesItem_default.accesskey, updatesItem_downloading.accesskey,
+  // updatesItem_resume.accesskey or updatesItem_pending.accesskey
+  checkForUpdates.accessKey = strings.getString("updatesItem_" + key +
+                                                ".accesskey");
+  appMenuCheckForUpdates.accessKey = strings.getString("updatesItem_" + key +
+                                                       ".accesskey");
+  if (um.activeUpdate && updates.isDownloading) {
+    checkForUpdates.setAttribute("loading", "true");
+    appMenuCheckForUpdates.setAttribute("loading", "true");  
+  } else {
+    checkForUpdates.removeAttribute("loading");
+    appMenuCheckForUpdates.removeAttribute("loading");
+  }
+#else
+#ifndef XP_MACOSX
+  // Some extensions may rely on these being present so only hide the about
+  // separator when there are no elements besides the check for updates menuitem
+  // in between the about separator and the updates separator.
+  var updatesSeparator = document.getElementById("updatesSeparator");
+  var aboutSeparator = document.getElementById("aboutSeparator");
+  var checkForUpdates = document.getElementById("checkForUpdates");
+  if (updatesSeparator.nextSibling === checkForUpdates &&
+      checkForUpdates.nextSibling === aboutSeparator)
+    updatesSeparator.hidden = true;
+#endif
+#endif
+}
+
+
 function openAboutDialog() {
   var enumerator = Services.wm.getEnumerator("Browser:About");
   while (enumerator.hasMoreElements()) {