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/* -*- 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/. */
#if defined(MOZILLA_INTERNAL_API)
# error This code is NOT for internal Gecko use!
#endif // defined(MOZILLA_INTERNAL_API)
#ifndef mozilla_a11y_HandlerChildEnumerator_h
# define mozilla_a11y_HandlerChildEnumerator_h
# include "AccessibleHandler.h"
# include "IUnknownImpl.h"
# include "mozilla/RefPtr.h"
namespace mozilla {
namespace a11y {
class HandlerChildEnumerator final : public IEnumVARIANT {
public:
explicit HandlerChildEnumerator(AccessibleHandler* aHandler,
IGeckoBackChannel* aGeckoBackChannel);
DECL_IUNKNOWN
// IEnumVARIANT
STDMETHODIMP Clone(IEnumVARIANT** aPpEnum) override;
STDMETHODIMP Next(ULONG aCelt, VARIANT* aRgVar,
ULONG* aPCeltFetched) override;
STDMETHODIMP Reset() override;
STDMETHODIMP Skip(ULONG aCelt) override;
private:
explicit HandlerChildEnumerator(const HandlerChildEnumerator& aEnumerator);
~HandlerChildEnumerator();
void ClearCache();
HRESULT MaybeCacheChildren();
RefPtr<AccessibleHandler> mHandler;
RefPtr<IGeckoBackChannel> mGeckoBackChannel;
UniquePtr<VARIANT[]> mChildren;
ULONG mChildCount;
ULONG mNextChild;
};
} // namespace a11y
} // namespace mozilla
#endif // mozilla_a11y_HandlerChildEnumerator_h
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