LCOV - code coverage report
Current view: directory - widget/xpwidgets - nsClipboardPrivacyHandler.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 53 0 0.0 %
Date: 2012-06-02 Functions: 8 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Ehsan Akhgari.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2009
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Ehsan Akhgari <ehsan.akhgari@gmail.com> (Original author)
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      27                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : #include "mozilla/Util.h"
      40                 : 
      41                 : #include "nsClipboardPrivacyHandler.h"
      42                 : #include "nsITransferable.h"
      43                 : #include "nsISupportsPrimitives.h"
      44                 : #include "nsIObserverService.h"
      45                 : #include "nsIClipboard.h"
      46                 : #include "nsComponentManagerUtils.h"
      47                 : #include "nsServiceManagerUtils.h"
      48                 : #include "nsLiteralString.h"
      49                 : #include "nsNetCID.h"
      50                 : #include "nsXPCOM.h"
      51                 : #include "mozilla/Services.h"
      52                 : 
      53                 : #if defined(XP_WIN)
      54                 : #include <ole2.h>
      55                 : #endif
      56                 : 
      57                 : using namespace mozilla;
      58                 : 
      59                 : #define NS_MOZ_DATA_FROM_PRIVATEBROWSING "application/x-moz-private-browsing"
      60                 : 
      61               0 : NS_IMPL_ISUPPORTS2(nsClipboardPrivacyHandler, nsIObserver, nsISupportsWeakReference)
      62                 : 
      63                 : nsresult
      64               0 : nsClipboardPrivacyHandler::Init()
      65                 : {
      66                 :   nsCOMPtr<nsIObserverService> observerService =
      67               0 :     mozilla::services::GetObserverService();
      68               0 :   if (!observerService)
      69               0 :     return NS_ERROR_FAILURE;
      70               0 :   return observerService->AddObserver(this, NS_PRIVATE_BROWSING_SWITCH_TOPIC,
      71               0 :                                       true);
      72                 : }
      73                 : 
      74                 : /**
      75                 :   * Prepare the transferable object to be inserted into the clipboard
      76                 :   *
      77                 :   */
      78                 : nsresult
      79               0 : nsClipboardPrivacyHandler::PrepareDataForClipboard(nsITransferable * aTransferable)
      80                 : {
      81               0 :   NS_ASSERTION(aTransferable, "clipboard given a null transferable");
      82                 : 
      83               0 :   nsresult rv = NS_OK;
      84               0 :   if (InPrivateBrowsing()) {
      85               0 :     nsCOMPtr<nsISupportsPRBool> data = do_CreateInstance(NS_SUPPORTS_PRBOOL_CONTRACTID);
      86               0 :     if (data) {
      87               0 :       rv = data->SetData(true);
      88               0 :       NS_ENSURE_SUCCESS(rv, rv);
      89                 : 
      90               0 :       rv = aTransferable->AddDataFlavor(NS_MOZ_DATA_FROM_PRIVATEBROWSING);
      91               0 :       NS_ENSURE_SUCCESS(rv, rv);
      92                 : 
      93               0 :       rv = aTransferable->SetTransferData(NS_MOZ_DATA_FROM_PRIVATEBROWSING, data, sizeof(bool));
      94               0 :       NS_ENSURE_SUCCESS(rv, rv);
      95                 :     }
      96                 :   }
      97                 : 
      98               0 :   return rv;
      99                 : }
     100                 : 
     101                 : NS_IMETHODIMP
     102               0 : nsClipboardPrivacyHandler::Observe(nsISupports *aSubject, char const *aTopic, PRUnichar const *aData)
     103                 : {
     104               0 :   if (NS_LITERAL_STRING(NS_PRIVATE_BROWSING_LEAVE).Equals(aData)) {
     105                 :     nsresult rv;
     106                 :     nsCOMPtr<nsIClipboard> clipboard =
     107               0 :       do_GetService("@mozilla.org/widget/clipboard;1", &rv);
     108               0 :     NS_ENSURE_SUCCESS(rv, rv);
     109                 : 
     110               0 :     const char * flavors[] = { NS_MOZ_DATA_FROM_PRIVATEBROWSING };
     111                 :     bool haveFlavors;
     112               0 :     rv = clipboard->HasDataMatchingFlavors(flavors,
     113                 :                                            ArrayLength(flavors),
     114                 :                                            nsIClipboard::kGlobalClipboard,
     115               0 :                                            &haveFlavors);
     116               0 :     if (NS_SUCCEEDED(rv) && haveFlavors) {
     117                 : #if defined(XP_WIN)
     118                 :       // Workaround for bug 518412.  On Windows 7 x64, there is a bug
     119                 :       // in handling clipboard data without any formats between
     120                 :       // 32-bit/64-bit boundaries, which could lead Explorer to crash.
     121                 :       // We work around the problem by clearing the clipboard using
     122                 :       // the usual Win32 API.
     123                 :       NS_ENSURE_TRUE(SUCCEEDED(::OleSetClipboard(NULL)), NS_ERROR_FAILURE);
     124                 : #else
     125                 :       // Empty the native clipboard by copying an empty transferable
     126                 :       nsCOMPtr<nsITransferable> nullData =
     127               0 :         do_CreateInstance("@mozilla.org/widget/transferable;1", &rv);
     128               0 :       NS_ENSURE_SUCCESS(rv, rv);
     129               0 :       rv = clipboard->SetData(nullData, nsnull,
     130               0 :                               nsIClipboard::kGlobalClipboard);
     131               0 :       NS_ENSURE_SUCCESS(rv, rv);
     132                 : #endif
     133                 :     }
     134                 :   }
     135                 : 
     136               0 :   return NS_OK;
     137                 : }
     138                 : 
     139                 : bool
     140               0 : nsClipboardPrivacyHandler::InPrivateBrowsing()
     141                 : {
     142               0 :   bool inPrivateBrowsingMode = false;
     143               0 :   if (!mPBService)
     144               0 :     mPBService = do_GetService(NS_PRIVATE_BROWSING_SERVICE_CONTRACTID);
     145               0 :   if (mPBService)
     146               0 :     mPBService->GetPrivateBrowsingEnabled(&inPrivateBrowsingMode);
     147               0 :   return inPrivateBrowsingMode;
     148                 : }
     149                 : 
     150                 : nsresult
     151               0 : NS_NewClipboardPrivacyHandler(nsClipboardPrivacyHandler ** aHandler)
     152                 : {
     153               0 :   NS_PRECONDITION(aHandler != nsnull, "null ptr");
     154               0 :   if (!aHandler)
     155               0 :     return NS_ERROR_NULL_POINTER;
     156                 : 
     157               0 :   *aHandler = new nsClipboardPrivacyHandler();
     158               0 :   if (!*aHandler)
     159               0 :     return NS_ERROR_OUT_OF_MEMORY;
     160                 : 
     161               0 :   NS_ADDREF(*aHandler);
     162               0 :   nsresult rv = (*aHandler)->Init();
     163               0 :   if (NS_FAILED(rv))
     164               0 :     NS_RELEASE(*aHandler);
     165                 : 
     166               0 :   return rv;
     167                 : }

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