xpcom/ds/nsArrayUtils.h
author Andreas Farre <farre@mozilla.com>
Sun, 05 May 2019 19:26:51 +0000
changeset 472634 f59b3336d254c80bf2b315a74fea0cb0fa8e0d47
parent 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1547911 - Don't assert that there are no children when restoring BC. r=nika This is essentially equal to restoring cached children and removing current children from a BrowsingContext, which is the correct behaviour. It would've been better if the current children were removed in a more transparent manner, but it is more important to remove an assert that too eagerly triggers. Differential Revision: https://phabricator.services.mozilla.com/D29945

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsArrayUtils_h__
#define nsArrayUtils_h__

#include "nsCOMPtr.h"
#include "nsIArray.h"

// helper class for do_QueryElementAt
class MOZ_STACK_CLASS nsQueryArrayElementAt final : public nsCOMPtr_helper {
 public:
  nsQueryArrayElementAt(nsIArray* aArray, uint32_t aIndex, nsresult* aErrorPtr)
      : mArray(aArray), mIndex(aIndex), mErrorPtr(aErrorPtr) {}

  virtual nsresult NS_FASTCALL operator()(const nsIID& aIID,
                                          void**) const override;

 private:
  nsIArray* MOZ_NON_OWNING_REF mArray;
  uint32_t mIndex;
  nsresult* mErrorPtr;
};

inline const nsQueryArrayElementAt do_QueryElementAt(nsIArray* aArray,
                                                     uint32_t aIndex,
                                                     nsresult* aErrorPtr = 0) {
  return nsQueryArrayElementAt(aArray, aIndex, aErrorPtr);
}

#endif  // nsArrayUtils_h__