summaryrefslogtreecommitdiffstats
path: root/winaccessibility/source/UAccCOM/EnumVariant.cxx
blob: 26cd75b254f9f031edbc3a10643f3731ddd3cd5d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * 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/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include "stdafx.h"
#include "EnumVariant.h"
#include "MAccessible.h"

#if defined __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wnon-virtual-dtor"
#endif
#include  <UAccCOM.h>
#if defined __clang__
#pragma clang diagnostic pop
#endif

#include <vcl/svapp.hxx>

using namespace com::sun::star::uno;
using namespace com::sun::star::accessibility;


// CEnumVariant


/**
   * enumerate method,get next element
   * @param  cElements The number of elements to be returned.
   * @param  pvar      An array of at least size celt in which the elements are to be returned.
   * @param  pcElementFetched Pointer to the number of elements returned in rgVar, or Null
   * @return Result.
   */
HRESULT STDMETHODCALLTYPE CEnumVariant::Next(ULONG cElements,VARIANT __RPC_FAR *pvar,ULONG __RPC_FAR *pcElementFetched)
{
    SolarMutexGuard g;

    long l1;
    ULONG l2;

    if (pvar == nullptr)
        return E_INVALIDARG;

    if (pcElementFetched != nullptr)
        *pcElementFetched = 0;

    // Retrieve the next cElements.
    for (l1=m_lCurrent, l2=0; l1<m_pXAccessibleSelection->getSelectedAccessibleChildCount() &&
            l2<cElements; l1++, l2++)
    {
        Reference< XAccessible > pRXAcc = m_pXAccessibleSelection->getSelectedAccessibleChild(l1);
        IAccessible* pChild = nullptr;
        bool isGet = CMAccessible::get_IAccessibleFromXAccessible(pRXAcc.get(),
                        &pChild);
        if(isGet)
        {
            pvar[l2].vt = VT_DISPATCH;
            pvar[l2].pdispVal = pChild;
            pChild->AddRef();
        }
        else if(pRXAcc.is())
        {
            if(CMAccessible::g_pAgent)
                CMAccessible::g_pAgent->InsertAccObj(pRXAcc.get(),pUNOInterface);
            isGet = CMAccessible::get_IAccessibleFromXAccessible(
                            pRXAcc.get(), &pChild);
            if(isGet)
            {
                pvar[l2].vt = VT_DISPATCH;
                pvar[l2].pdispVal = pChild;
                pChild->AddRef();
            }
        }
    }
    // Set count of elements retrieved.
    if (pcElementFetched != nullptr)
        *pcElementFetched = l2;
    m_lCurrent = l1;

    return (l2 < cElements) ? S_FALSE : NOERROR;
}

/**
   * skip the elements in the given range when enumerate elements
   * @param  cElements The number of elements to skip.
   * @return Result.
   */
HRESULT STDMETHODCALLTYPE CEnumVariant::Skip(ULONG cElements)
{
    SolarMutexGuard g;

    m_lCurrent += cElements;
    if (m_lCurrent > static_cast<long>(m_lLBound+m_pXAccessibleSelection->getSelectedAccessibleChildCount()))
    {
        m_lCurrent =  m_lLBound+m_pXAccessibleSelection->getSelectedAccessibleChildCount();
        return E_FAIL;
    }
    else
        return NOERROR;
}


/**
   * reset the enumaration position to initial value
   * @param
   * @return Result.
   */
HRESULT STDMETHODCALLTYPE CEnumVariant::Reset()
{
    SolarMutexGuard g;

    m_lCurrent = m_lLBound;
    return NOERROR;
}


/**
   *create a new IEnumVariant object,
   *copy current enumaration container and its state to
   *the new object
   *AT will use the copy object to get elements
   * @param ppenum On return, pointer to the location of the clone enumerator
   * @return Result.
   */
HRESULT STDMETHODCALLTYPE CEnumVariant::Clone(IEnumVARIANT __RPC_FAR *__RPC_FAR *ppenum)
{
    SolarMutexGuard g;

    CEnumVariant * penum = nullptr;
    HRESULT hr;
    if (ppenum == nullptr)
        return E_INVALIDARG;

    *ppenum = nullptr;

    hr = Create(&penum);
    if( hr == S_OK )
    {
        penum->PutSelection(reinterpret_cast<hyper>(pUNOInterface));
        *ppenum = penum;
    }
    else
    {
        if (penum)
            penum->Release();
    }
    return hr;
}

/**
   *Static public method to create a CLSID_EnumVariant com object.
   * @param ppenum Pointer to accept com object.
   * @return Result.
   */
HRESULT STDMETHODCALLTYPE CEnumVariant::Create(CEnumVariant __RPC_FAR *__RPC_FAR *ppenum)
{
    SolarMutexGuard g;

    HRESULT hr = createInstance<CEnumVariant>(IID_IEnumVariant, ppenum);
    if (S_OK != hr)
    {
        return E_FAIL;
    }

    return S_OK;
}

/**
   *Return count of elements in current container
   * @param.
   * @return count of elements in current container.
   */
long CEnumVariant::GetCountOfElements()
{
    if(m_pXAccessibleSelection.is())
        return m_pXAccessibleSelection->getSelectedAccessibleChildCount();
    return 0;
}

/**
   * Set member m_pXAccessibleSelection to NULL and m_lCurrent to m_lLBound.
   * @param.
   * @return Result
   */
COM_DECLSPEC_NOTHROW STDMETHODIMP CEnumVariant::ClearEnumeration()
{
    // internal IEnumVariant - no mutex meeded

    pUNOInterface = nullptr;
    m_pXAccessibleSelection = nullptr;
    m_lCurrent = m_lLBound;
    return S_OK;
}

/**
   *Static method to fetch XAccessibleSelection
   * @param pXAcc XAccessible interface.
   * @return XAccessibleSelection interface.
   */
static Reference<XAccessibleSelection> GetXAccessibleSelection(XAccessible* pXAcc)
{
    if( pXAcc == nullptr)
        return nullptr;

    Reference< XAccessibleContext > pRContext = pXAcc->getAccessibleContext();
    if( !pRContext.is() )
        return nullptr;

    Reference< XAccessibleSelection > pRSelection(pRContext,UNO_QUERY);
    if( !pRSelection.is() )
        return nullptr;

    return pRSelection;
}

/**
   * Put valid UNO XAccessible interface.
   * @param pXSelection XAccessible interface.
   * @return Result...
   */
STDMETHODIMP CEnumVariant::PutSelection(hyper pXSelection)
{
    // internal IEnumVariant - no mutex meeded

    pUNOInterface = reinterpret_cast<XAccessible*>(pXSelection);
    m_pXAccessibleSelection = GetXAccessibleSelection(pUNOInterface);
    return S_OK;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */