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