xpcom/glue/nsTObserverArray.cpp

   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/
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  10  * Software distributed under the License is distributed on an "AS IS" basis,
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  14  *
  15  * The Original Code is Mozilla.org code.
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  17  * The Initial Developer of the Original Code is Mozilla Foundation.
  18  * Portions created by the Initial Developer are Copyright (C) 2006
  19  * the Initial Developer. All Rights Reserved.
  20  *
  21  * Contributor(s):
  22  *   Jonas Sicking <jonas@sicking.cc> (Original Author)
  23  *   Daniel Witte <dwitte@stanford.edu>
  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
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  37  * ***** END LICENSE BLOCK ***** */
  38
  39 #include "nsTObserverArray.h"
  40
  41 void
  42 nsTObserverArray_base::AdjustIterators(index_type aModPos,
  43                                        diff_type  aAdjustment)
  44 {
  45   NS_PRECONDITION(aAdjustment == -1 || aAdjustment == 1,
  46                   "invalid adjustment");
  47   Iterator_base* iter = mIterators;
  48   while (iter) {
  49     if (iter->mPosition > aModPos) {
  50       iter->mPosition += aAdjustment;
  51     }
  52     iter = iter->mNext;
  53   }
  54 }
  55
  56 void
  57 nsTObserverArray_base::ClearIterators()
  58 {
  59   Iterator_base* iter = mIterators;
  60   while (iter) {
  61     iter->mPosition = 0;
  62     iter = iter->mNext;
  63   }
  64 }