92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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#include "EnumVariant.h"
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using namespace mozilla;
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using namespace mozilla::a11y;
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////////////////////////////////////////////////////////////////////////////////
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// ChildrenEnumVariant
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////////////////////////////////////////////////////////////////////////////////
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IMPL_IUNKNOWN_QUERY_HEAD(ChildrenEnumVariant)
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IMPL_IUNKNOWN_QUERY_IFACE(IEnumVARIANT)
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IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(mAnchorAcc)
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STDMETHODIMP
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ChildrenEnumVariant::Next(ULONG aCount, VARIANT FAR* aItems,
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ULONG FAR* aCountFetched)
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{
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if (!aItems || !aCountFetched)
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return E_INVALIDARG;
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*aCountFetched = 0;
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if (mAnchorAcc->IsDefunct() || mAnchorAcc->GetChildAt(mCurIndex) != mCurAcc)
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return CO_E_OBJNOTCONNECTED;
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ULONG countFetched = 0;
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while (mCurAcc && countFetched < aCount) {
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VariantInit(aItems + countFetched);
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IDispatch* accNative = AccessibleWrap::NativeAccessible(mCurAcc);
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++mCurIndex;
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mCurAcc = mAnchorAcc->GetChildAt(mCurIndex);
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// Don't output the accessible and count it as having been fetched unless
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// it is non-null
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MOZ_ASSERT(accNative);
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if (!accNative) {
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continue;
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}
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aItems[countFetched].pdispVal = accNative;
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aItems[countFetched].vt = VT_DISPATCH;
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++countFetched;
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}
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(*aCountFetched) = countFetched;
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return countFetched < aCount ? S_FALSE : S_OK;
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}
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STDMETHODIMP
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ChildrenEnumVariant::Skip(ULONG aCount)
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{
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if (mAnchorAcc->IsDefunct() || mAnchorAcc->GetChildAt(mCurIndex) != mCurAcc)
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return CO_E_OBJNOTCONNECTED;
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mCurIndex += aCount;
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mCurAcc = mAnchorAcc->GetChildAt(mCurIndex);
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return mCurAcc ? S_OK : S_FALSE;
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}
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STDMETHODIMP
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ChildrenEnumVariant::Reset()
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{
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if (mAnchorAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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mCurIndex = 0;
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mCurAcc = mAnchorAcc->GetChildAt(0);
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return S_OK;
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}
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STDMETHODIMP
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ChildrenEnumVariant::Clone(IEnumVARIANT** aEnumVariant)
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{
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if (!aEnumVariant)
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return E_INVALIDARG;
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*aEnumVariant = new ChildrenEnumVariant(*this);
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(*aEnumVariant)->AddRef();
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return S_OK;
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}
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