docshell/base/nsDocShellTransferableHooks.cpp

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   3  *
   4  * The contents of this file are subject to the Mozilla Public License Version
   5  * 1.1 (the "License"); you may not use this file except in compliance with
   6  * the License. You may obtain a copy of the License at
   7  * http://www.mozilla.org/MPL/
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   9  * Software distributed under the License is distributed on an "AS IS" basis,
  10  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  11  * for the specific language governing rights and limitations under the
  12  * License.
  13  *
  14  * The Original Code is Mozilla Communicator.
  15  *
  16  * The Initial Developer of the Original Code is
  17  * Netscape Communications.
  18  * Portions created by the Initial Developer are Copyright (C) 2003
  19  * the Initial Developer. All Rights Reserved.
  20  *
  21  * Contributor(s):
  22  *  Kathleen Brade <brade@netscape.com>
  23  *
  24  * Alternatively, the contents of this file may be used under the terms of
  25  * either the GNU General Public License Version 2 or later (the "GPL"), or
  26  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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  36  * ***** END LICENSE BLOCK ***** */
  37
  38 #include "nsCOMPtr.h"
  39 #include "nsCOMArray.h"
  40 #include "nsDocShellTransferableHooks.h"
  41 #include "nsIClipboardDragDropHooks.h"
  42 #include "nsIClipboardDragDropHookList.h"
  43 #include "nsISimpleEnumerator.h"
  44 #include "nsArrayEnumerator.h"
  45
  46 nsTransferableHookData::nsTransferableHookData()
  47 {
  48 }
  49
  50
  51 nsTransferableHookData::~nsTransferableHookData()
  52 {
  53 }
  54
  55 //*****************************************************************************
  56 // nsIClipboardDragDropHookList
  57 //*****************************************************************************
  58
  59 NS_IMPL_ISUPPORTS1(nsTransferableHookData, nsIClipboardDragDropHookList)
  60
  61 NS_IMETHODIMP
  62 nsTransferableHookData::AddClipboardDragDropHooks(
  63                                         nsIClipboardDragDropHooks *aOverrides)
  64 {
  65     NS_ENSURE_ARG(aOverrides);
  66
  67     // don't let a hook be added more than once
  68     if (mHookList.IndexOfObject(aOverrides) == -1)
  69     {
  70         if (!mHookList.AppendObject(aOverrides))
  71             return NS_ERROR_FAILURE;
  72     }
  73
  74     return NS_OK;
  75 }
  76
  77 NS_IMETHODIMP
  78 nsTransferableHookData::RemoveClipboardDragDropHooks(
  79                                          nsIClipboardDragDropHooks *aOverrides)
  80 {
  81     NS_ENSURE_ARG(aOverrides);
  82     if (!mHookList.RemoveObject(aOverrides))
  83         return NS_ERROR_FAILURE;
  84
  85     return NS_OK;
  86 }
  87
  88 NS_IMETHODIMP
  89 nsTransferableHookData::GetHookEnumerator(nsISimpleEnumerator **aResult)
  90 {
  91     return NS_NewArrayEnumerator(aResult, mHookList);
  92 }