author L. David Baron <>
Thu, 24 Mar 2011 21:06:15 -0700
changeset 63859 1492b6e75639593efe4e45e153a34927605509a0
parent 47159 84c1694a4ca9af3a0fd5605a7ec0e9b9e7bd0129
child 98529 f4157e8c410708d76703f19e4dfb61859bfe32d8
permissions -rw-r--r--
Backout changeset b97a060746f9 (Bug 620931 part 5) for causing bug 644790.

/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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
 * 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 code.
 * The Initial Developer of the Original Code is
 * Boris Zbarsky <>.
 * 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"

interface nsIWebNavigation;

 * The nsIWebNavigationInfo interface exposes a way to get information
 * on the capabilities of Gecko webnavigation objects.
[scriptable, uuid(62a93afb-93a1-465c-84c8-0432264229de)]
interface nsIWebNavigationInfo : nsISupports
   * Returned by isTypeSupported to indicate lack of support for a type.
   * @note this is guaranteed not to change, so that boolean tests can be done
   * on the return value if isTypeSupported to detect whether a type is
   * supported at all.
  const unsigned long UNSUPPORTED = 0;

   * Returned by isTypeSupported to indicate that a type is supported as an
   * image.
  const unsigned long IMAGE = 1;

   * Returned by isTypeSupported to indicate that a type is supported via an
   * NPAPI ("Netscape 4 API") plug-in.  This is not the value returned for
   * "XPCOM plug-ins".
  const unsigned long PLUGIN = 2;

   * @note Other return types may be added here in the future as they become
   * relevant.
   * Returned by isTypeSupported to indicate that a type is supported via some
   * other means.
  const unsigned long OTHER = 1 << 15;

   * Query whether aType is supported.
   * @param aType the MIME type in question.
   * @param aWebNav the nsIWebNavigation object for which the request
   *        is being made.  This is allowed to be null.  If it is non-null,
   *        the return value of this method may depend on the exact state of
   *        aWebNav and the values set through nsIWebBrowserSetup; otherwise
   *        the method will assume that the caller is interested in information
   *        about nsIWebNavigation objects in their default state.
   * @return an enum value indicating whether and how aType is supported.
   * @note This method may rescan plugins to ensure that they're properly
   *       registered for the types they support.
  unsigned long isTypeSupported(in ACString aType, in nsIWebNavigation aWebNav);