The Tor Browser: accessible/src/windows/msaa/EnumVariant.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* vim: set ts=2 et sw=2 tw=80: */

     3 /* This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

     5  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #include "EnumVariant.h"

     9 using namespace mozilla;

    10 using namespace mozilla::a11y;

    12 ////////////////////////////////////////////////////////////////////////////////

    13 // ChildrenEnumVariant

    14 ////////////////////////////////////////////////////////////////////////////////

    16 IMPL_IUNKNOWN_QUERY_HEAD(ChildrenEnumVariant)

    17 IMPL_IUNKNOWN_QUERY_IFACE(IEnumVARIANT);

    18 IMPL_IUNKNOWN_QUERY_IFACE(IUnknown);

    19 IMPL_IUNKNOWN_QUERY_AGGR_COND(mAnchorAcc, !mAnchorAcc->IsDefunct());

    20 IMPL_IUNKNOWN_QUERY_TAIL

    22 STDMETHODIMP

    23 ChildrenEnumVariant::Next(ULONG aCount, VARIANT FAR* aItems,

    24                           ULONG FAR* aCountFetched)

    25 {

    26   A11Y_TRYBLOCK_BEGIN

    28   if (!aItems || !aCountFetched)

    29     return E_INVALIDARG;

    31   *aCountFetched = 0;

    33   if (mAnchorAcc->IsDefunct() || mAnchorAcc->GetChildAt(mCurIndex) != mCurAcc)

    34     return CO_E_OBJNOTCONNECTED;

    36   ULONG countFetched = 0;

    37   for (; mCurAcc && countFetched < aCount; countFetched++) {

    38     VariantInit(aItems + countFetched);

    39     aItems[countFetched].pdispVal = AccessibleWrap::NativeAccessible(mCurAcc);

    40     aItems[countFetched].vt = VT_DISPATCH;

    42     mCurIndex++;

    43     mCurAcc = mAnchorAcc->GetChildAt(mCurIndex);

    44   }

    46   (*aCountFetched) = countFetched;

    48   return countFetched < aCount ? S_FALSE : S_OK;

    50   A11Y_TRYBLOCK_END

    51 }

    53 STDMETHODIMP

    54 ChildrenEnumVariant::Skip(ULONG aCount)

    55 {

    56   A11Y_TRYBLOCK_BEGIN

    58   if (mAnchorAcc->IsDefunct() || mAnchorAcc->GetChildAt(mCurIndex) != mCurAcc)

    59     return CO_E_OBJNOTCONNECTED;

    61   mCurIndex += aCount;

    62   mCurAcc = mAnchorAcc->GetChildAt(mCurIndex);

    64   return mCurAcc ? S_OK : S_FALSE;

    66   A11Y_TRYBLOCK_END

    67 }

    69 STDMETHODIMP

    70 ChildrenEnumVariant::Reset()

    71 {

    72   A11Y_TRYBLOCK_BEGIN

    74   if (mAnchorAcc->IsDefunct())

    75     return CO_E_OBJNOTCONNECTED;

    77   mCurIndex = 0;

    78   mCurAcc = mAnchorAcc->GetChildAt(0);

    80   return S_OK;

    82   A11Y_TRYBLOCK_END

    83 }

    85 STDMETHODIMP

    86 ChildrenEnumVariant::Clone(IEnumVARIANT** aEnumVariant)

    87 {

    88   A11Y_TRYBLOCK_BEGIN

    90   if (!aEnumVariant)

    91     return E_INVALIDARG;

    93   *aEnumVariant = new ChildrenEnumVariant(*this);

    94   (*aEnumVariant)->AddRef();

    96   return S_OK;

    98   A11Y_TRYBLOCK_END

    99 }

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