author L. David Baron <>
Mon, 20 Jul 2009 07:04:41 -0400
changeset 30421 aa85b2f55960cac97780c712fdf05c9e263c2fd8
parent 1 9b2a99adc05e53cd4010de512f50118594756650
permissions -rw-r--r--
Use char16_t when available, and when it is, don't test for -fshort-wchar. (Bug 502298) r=bsmedberg

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
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 * Google Inc.
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 * the Initial Developer. All Rights Reserved.
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 *   Brett Wilson <>
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#include "nsISupports.idl"
#include "nsIGlobalHistory2.idl"
interface nsIChannel;


// This is NOT part of the interface! It could change.


 * Provides information about global history to gecko, extending GlobalHistory2
[scriptable, uuid(24306852-c60e-49c3-a455-90f6747118ba)]
interface nsIGlobalHistory3 : nsIGlobalHistory2
   * Notifies the history system that the page loading via aOldChannel
   * redirected to aNewChannel. Implementations should generally add the URI for
   * aOldChannel to history for link coloring, but are advised not to expose it
   * in the history user interface. This function is preferred if
   * nsIGlobalHistory3 is available. Otherwise, nsIGlobalHistory2.addURI should
   * be called with redirect=true.
   * This function is preferred to nsIGlobalHistory2.addURI because it provides
   * more information (including the redirect destination, channels involved,
   * and redirect flags) to the history implementation.
   * For implementors of nsIGlobalHistory3: The history implementation is
   * responsible for sending NS_LINK_VISITED_EVENT_TOPIC to observers for
   * redirect pages. This notification must be sent for history consumers for
   * all non-redirect pages.
   * @param aToplevel whether the URI is loaded in a top-level window.  If
   *        false, the load is in a subframe.
   * The other params to this function are the same as those for
   * nsIChannelEventSink::OnChannelRedirect.
   * Note: Implementors who wish to implement this interface but rely on
   * nsIGlobalHistory2.addURI for redirect processing may throw
   * NS_ERROR_NOT_IMPLEMENTED from this method.  If they do so, then callers
   * must call nsIGlobalHistory2.addURI upon getting the
  void addDocumentRedirect(in nsIChannel aOldChannel,
                           in nsIChannel aNewChannel,
                           in PRInt32 aFlags,
                           in boolean aTopLevel);

   * Get the Gecko flags for this URI. These flags are used by Gecko as hints
   * to optimize page loading. Not all histories have them; this need not be
   * supported (just return NS_ERROR_NOT_IMPLEMENTED. These flags are opaque
   * and should not be interpreted by the history engine.
  unsigned long getURIGeckoFlags(in nsIURI aURI);

   * Set the Gecko flags for this URI. May fail if the history entry
   * doesn't have any flags or if there is no entry for the URI.
  void setURIGeckoFlags(in nsIURI aURI, in unsigned long aFlags);