1 files changed, 114 insertions, 0 deletions
diff --git a/browser/components/shell/ShellService.jsm b/browser/components/shell/ShellService.jsm
new file mode 100644
index 000000000..2a3400b60
--- /dev/null
+++ b/browser/components/shell/ShellService.jsm
@@ -0,0 +1,114 @@
+/* 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";
+
+this.EXPORTED_SYMBOLS = ["ShellService"];
+
+const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
+
+Cu.import("resource://gre/modules/AppConstants.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "WindowsRegistry",
+                                  "resource://gre/modules/WindowsRegistry.jsm");
+
+/**
+ * Internal functionality to save and restore the docShell.allow* properties.
+ */
+let ShellServiceInternal = {
+  /**
+   * Used to determine whether or not to offer "Set as desktop background"
+   * functionality. Even if shell service is available it is not
+   * guaranteed that it is able to set the background for every desktop
+   * which is especially true for Linux with its many different desktop
+   * environments.
+   */
+  get canSetDesktopBackground() {
+    if (AppConstants.platform == "win" ||
+        AppConstants.platform == "macosx") {
+      return true;
+    }
+
+    if (AppConstants.platform == "linux") {
+      if (this.shellService) {
+        let linuxShellService = this.shellService
+                                    .QueryInterface(Ci.nsIGNOMEShellService);
+        return linuxShellService.canSetDesktopBackground;
+      }
+    }
+
+    return false;
+  },
+
+  /**
+   * Used to determine whether or not to show a "Set Default Browser"
+   * query dialog. This attribute is true if the application is starting
+   * up and "browser.shell.checkDefaultBrowser" is true, otherwise it
+   * is false.
+   */
+  _checkedThisSession: false,
+  get shouldCheckDefaultBrowser() {
+    // If we've already checked, the browser has been started and this is a
+    // new window open, and we don't want to check again.
+    if (this._checkedThisSession) {
+      return false;
+    }
+
+    if (!Services.prefs.getBoolPref("browser.shell.checkDefaultBrowser")) {
+      return false;
+    }
+
+    if (AppConstants.platform == "win") {
+      let optOutValue = WindowsRegistry.readRegKey(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
+                                                   "Software\\Mozilla\\Firefox",
+                                                   "DefaultBrowserOptOut");
+      WindowsRegistry.removeRegKey(Ci.nsIWindowsRegKey.ROOT_KEY_CURRENT_USER,
+                                   "Software\\Mozilla\\Firefox",
+                                   "DefaultBrowserOptOut");
+      if (optOutValue == "True") {
+        Services.prefs.setBoolPref("browser.shell.checkDefaultBrowser", false);
+        return false;
+      }
+    }
+
+    return true;
+  },
+
+  set shouldCheckDefaultBrowser(shouldCheck) {
+    Services.prefs.setBoolPref("browser.shell.checkDefaultBrowser", !!shouldCheck);
+  },
+
+  isDefaultBrowser(startupCheck, forAllTypes) {
+    // If this is the first browser window, maintain internal state that we've
+    // checked this session (so that subsequent window opens don't show the
+    // default browser dialog).
+    if (startupCheck) {
+      this._checkedThisSession = true;
+    }
+    if (this.shellService) {
+      return this.shellService.isDefaultBrowser(startupCheck, forAllTypes);
+    }
+    return false;
+  }
+};
+
+XPCOMUtils.defineLazyServiceGetter(ShellServiceInternal, "shellService",
+  "@mozilla.org/browser/shell-service;1", Ci.nsIShellService);
+
+/**
+ * The external API exported by this module.
+ */
+this.ShellService = new Proxy(ShellServiceInternal, {
+  get(target, name) {
+    if (name in target) {
+      return target[name];
+    }
+    if (target.shellService) {
+      return target.shellService[name];
+    }
+    Services.console.logStringMessage(`${name} not found in ShellService: ${target.shellService}`);
+    return undefined;
+  }
+});