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299944292f
As part of this, I changed RemoteAccessible::RemoteChildAt (and thus RemoteAccessible::ChildAt) so it doesn't crash when passed an invalid child index. Our EnumVariant implementation relied on this with LocalChildAt. I think it makes sense for LocalChildAt, RemoteChildAt and ChildAt to be consistent in this regard. Differential Revision: https://phabricator.services.mozilla.com/D122681
63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_a11y_EnumVariant_h__
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#define mozilla_a11y_EnumVariant_h__
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#include "IUnknownImpl.h"
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#include "MsaaAccessible.h"
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namespace mozilla {
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namespace a11y {
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/**
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* Used to fetch accessible children.
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*/
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class ChildrenEnumVariant final : public IEnumVARIANT {
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public:
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explicit ChildrenEnumVariant(MsaaAccessible* aAnchor)
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: mAnchorMsaa(aAnchor),
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mCurAcc(mAnchorMsaa->Acc()->ChildAt(0)),
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mCurIndex(0) {}
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// IUnknown
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DECL_IUNKNOWN
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// IEnumVariant
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virtual /* [local] */ HRESULT STDMETHODCALLTYPE Next(
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/* [in] */ ULONG aCount,
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/* [length_is][size_is][out] */ VARIANT* aItems,
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/* [out] */ ULONG* aCountFetched);
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virtual HRESULT STDMETHODCALLTYPE Skip(
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/* [in] */ ULONG aCount);
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virtual HRESULT STDMETHODCALLTYPE Reset();
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virtual HRESULT STDMETHODCALLTYPE Clone(
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/* [out] */ IEnumVARIANT** aEnumVaraint);
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private:
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ChildrenEnumVariant() = delete;
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ChildrenEnumVariant& operator=(const ChildrenEnumVariant&) = delete;
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ChildrenEnumVariant(const ChildrenEnumVariant& aEnumVariant)
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: mAnchorMsaa(aEnumVariant.mAnchorMsaa),
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mCurAcc(aEnumVariant.mCurAcc),
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mCurIndex(aEnumVariant.mCurIndex) {}
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virtual ~ChildrenEnumVariant() {}
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protected:
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RefPtr<MsaaAccessible> mAnchorMsaa;
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Accessible* mCurAcc;
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uint32_t mCurIndex;
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};
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} // namespace a11y
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} // namespace mozilla
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#endif
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