/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Mozilla XUL Toolkit.
 *
 * The Initial Developer of the Original Code is
 * Benjamin Smedberg <benjamin@smedbergs.us>
 *
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

/**
 * Provides information about the XUL runtime.
 * @status UNSTABLE - This interface is not frozen and will probably change in
 *                    future releases. If you need this functionality to be
 *                    stable/frozen, please contact Benjamin Smedberg.
 */

[scriptable, uuid(7685dac8-3637-4660-a544-928c5ec0e714)]
interface nsIXULRuntime : nsISupports
{
  /**
   * Whether the application was launched in safe mode.
   */
  readonly attribute boolean inSafeMode;

  /**
   * Whether to write console errors to a log file. If a component
   * encounters startup errors that might prevent the app from showing
   * proper UI, it should set this flag to "true".
   */
  attribute boolean logConsoleErrors;

  /**
   * A string tag identifying the current operating system. This is taken
   * from the OS_TARGET configure variable. It will always be available.
   */
  readonly attribute AUTF8String OS;

  /**
   * A string tag identifying the binary ABI of the current processor and
   * compiler vtable. This is taken from the TARGET_XPCOM_ABI configure
   * variable. It may not be available on all platforms, especially
   * unusual processor or compiler combinations.
   *
   * The result takes the form <processor>-<compilerABI>, for example:
   *   x86-msvc
   *   ppc-gcc3
   *
   * This value should almost always be used in combination with "OS".
   *
   * @throw NS_ERROR_NOT_AVAILABLE if not available.
   */
  readonly attribute AUTF8String XPCOMABI;

  /**
   * A string tag identifying the target widget toolkit in use.
   * This is taken from the MOZ_WIDGET_TOOLKIT configure variable.
   */
  readonly attribute AUTF8String widgetToolkit;

  /**
   * The legal values of processType.
   */
  const unsigned long PROCESS_TYPE_DEFAULT = 0;
  const unsigned long PROCESS_TYPE_PLUGIN = 1;
  const unsigned long PROCESS_TYPE_CONTENT = 2;
  const unsigned long PROCESS_TYPE_IPDLUNITTEST = 3;

  /**
   * The type of the caller's process.  Returns one of the values above.
   */
  readonly attribute unsigned long processType;

  /**
   * Signal the apprunner to invalidate caches on the next restart.
   * This will cause components to be autoregistered and all
   * fastload data to be re-created.
   */
  void invalidateCachesOnRestart();

  /**
   * Starts a child process. This method is intented to pre-start a
   * content child process so that when it is actually needed, it is
   * ready to go.
   *
   * @throw NS_ERROR_NOT_AVAILABLE if not available.
   */
  void ensureContentProcess();
};
