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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#include "nsISupports.idl"
+
+interface nsIDOMElement;
+interface nsIFile;
+
+[scriptable, uuid(2d1a95e4-5bd8-4eeb-b0a8-c1455fd2a357)]
+interface nsIShellService : nsISupports
+{
+ /**
+ * Determines whether or not Firefox is the "Default Browser."
+ * This is simply whether or not Firefox is registered to handle
+ * http links.
+ *
+ * @param aStartupCheck true if this is the check being performed
+ * by the first browser window at startup,
+ * false otherwise.
+ * @param aForAllTypes true if the check should be made for HTTP and HTML.
+ * false if the check should be made for HTTP only.
+ * This parameter may be ignored on some platforms.
+ */
+ boolean isDefaultBrowser(in boolean aStartupCheck,
+ [optional] in boolean aForAllTypes);
+
+ /**
+ * Registers Firefox as the "Default Browser."
+ *
+ * @param aClaimAllTypes Register Firefox as the handler for
+ * additional protocols (ftp, chrome etc)
+ * and web documents (.html, .xhtml etc).
+ * @param aForAllUsers Whether or not Firefox should attempt
+ * to become the default browser for all
+ * users on a multi-user system.
+ */
+ void setDefaultBrowser(in boolean aClaimAllTypes, in boolean aForAllUsers);
+
+ /**
+ * Flags for positioning/sizing of the Desktop Background image.
+ */
+ const long BACKGROUND_TILE = 1;
+ const long BACKGROUND_STRETCH = 2;
+ const long BACKGROUND_CENTER = 3;
+ const long BACKGROUND_FILL = 4;
+ const long BACKGROUND_FIT = 5;
+
+ /**
+ * Sets the desktop background image using either the HTML <IMG>
+ * element supplied or the background image of the element supplied.
+ *
+ * @param aImageElement Either a HTML <IMG> element or an element with
+ * a background image from which to source the
+ * background image.
+ * @param aPosition How to place the image on the desktop
+ */
+ void setDesktopBackground(in nsIDOMElement aElement, in long aPosition);
+
+ /**
+ * Constants identifying applications that can be opened with
+ * openApplication.
+ */
+ const long APPLICATION_MAIL = 0;
+ const long APPLICATION_NEWS = 1;
+
+ /**
+ * Opens the application specified. If more than one application of the
+ * given type is available on the system, the default or "preferred"
+ * application is used.
+ */
+ void openApplication(in long aApplication);
+
+ /**
+ * The desktop background color, visible when no background image is
+ * used, or if the background image is centered and does not fill the
+ * entire screen. A rgb value, where (r << 16 | g << 8 | b)
+ */
+ attribute unsigned long desktopBackgroundColor;
+
+ /**
+ * Opens an application with a specific URI to load.
+ * @param application
+ * The application file (or bundle directory, on OS X)
+ * @param uri
+ * The uri to be loaded by the application
+ */
+ void openApplicationWithURI(in nsIFile aApplication, in ACString aURI);
+
+ /**
+ * The default system handler for web feeds
+ */
+ readonly attribute nsIFile defaultFeedReader;
+};