author Robert O'Callahan <>
Sat, 14 Aug 2010 02:27:26 +1200
changeset 50432 5c4ea1bbffad227b6804af73055458972da84804
parent 43473 0327e126ea245112c0aa7283fee154e084866fb5
child 68389 457757151653a6f7b4cefff2782396dcca20ccba
permissions -rw-r--r--
Dummy commit

/* -*- Mode: C++; 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 "nsWebNavigationInfo.h"
#include "nsIWebNavigation.h"
#include "nsString.h"
#include "nsServiceManagerUtils.h"
#include "nsIContentUtils.h"
#include "nsIDocumentLoaderFactory.h"
#include "nsIPluginHost.h"

NS_IMPL_ISUPPORTS1(nsWebNavigationInfo, nsIWebNavigationInfo)


  nsresult rv;
  mCategoryManager = do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);

  mImgLoader = do_GetService(";1", &rv);

  return rv;

nsWebNavigationInfo::IsTypeSupported(const nsACString& aType,
                                     nsIWebNavigation* aWebNav,
                                     PRUint32* aIsTypeSupported)
  NS_PRECONDITION(aIsTypeSupported, "null out param?");

  // Note to self: aWebNav could be an nsWebBrowser or an nsDocShell here (or
  // an nsSHistory, but not much we can do with that).  So if we start using
  // it here, we need to be careful to get to the docshell correctly.
  // For now just report what the Gecko-Content-Viewers category has
  // to say for itself.
  *aIsTypeSupported = nsIWebNavigationInfo::UNSUPPORTED;

  const nsCString& flatType = PromiseFlatCString(aType);
  nsresult rv = IsTypeSupportedInternal(flatType, aIsTypeSupported);

  if (*aIsTypeSupported) {
    return rv;
  // Try reloading plugins in case they've changed.
  nsCOMPtr<nsIPluginHost> pluginHost =
  if (pluginHost) {
    // PR_FALSE will ensure that currently running plugins will not
    // be shut down
    rv = pluginHost->ReloadPlugins(PR_FALSE);
    if (NS_SUCCEEDED(rv)) {
      // OK, we reloaded plugins and there were new ones
      // (otherwise NS_ERROR_PLUGINS_PLUGINSNOTCHANGED would have
      // been returned).  Try checking whether we can handle the
      // content now.
      return IsTypeSupportedInternal(flatType, aIsTypeSupported);

  return NS_OK;

nsWebNavigationInfo::IsTypeSupportedInternal(const nsCString& aType,
                                             PRUint32* aIsSupported)
  NS_PRECONDITION(aIsSupported, "Null out param?");

  nsCOMPtr<nsIContentUtils> cutils = do_GetService(";1");
  if (!cutils)
      return NS_ERROR_FAILURE;

  nsIContentUtils::ContentViewerType vtype = nsIContentUtils::TYPE_UNSUPPORTED;

  nsCOMPtr<nsIDocumentLoaderFactory> docLoaderFactory =
    cutils->FindInternalContentViewer(aType.get(), &vtype);
  switch (vtype) {
  case nsIContentUtils::TYPE_UNSUPPORTED:
    *aIsSupported = nsIWebNavigationInfo::UNSUPPORTED;

  case nsIContentUtils::TYPE_PLUGIN:
    *aIsSupported = nsIWebNavigationInfo::PLUGIN;

  case nsIContentUtils::TYPE_UNKNOWN:
    *aIsSupported = nsIWebNavigationInfo::OTHER;

  case nsIContentUtils::TYPE_CONTENT:
    PRBool isImage = PR_FALSE;
    mImgLoader->SupportImageWithMimeType(aType.get(), &isImage);
    if (isImage) {
      *aIsSupported = nsIWebNavigationInfo::IMAGE;
    else {
      *aIsSupported = nsIWebNavigationInfo::OTHER;
  return NS_OK;