[50460] | 1 | /* $Id: UIDnDEnumFormat_win.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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[52727] | 3 | * VBox Qt GUI - UIDnDEnumFormat class implementation. This class implements the
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[50460] | 4 | * IEnumFORMATETC ("Format et cetera") interface.
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| 5 | */
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| 6 |
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| 7 | /*
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[98103] | 8 | * Copyright (C) 2014-2023 Oracle and/or its affiliates.
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[50460] | 9 | *
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[96407] | 10 | * This file is part of VirtualBox base platform packages, as
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| 11 | * available from https://www.virtualbox.org.
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| 12 | *
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| 13 | * This program is free software; you can redistribute it and/or
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| 14 | * modify it under the terms of the GNU General Public License
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| 15 | * as published by the Free Software Foundation, in version 3 of the
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| 16 | * License.
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| 17 | *
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| 18 | * This program is distributed in the hope that it will be useful, but
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| 19 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 21 | * General Public License for more details.
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| 22 | *
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| 23 | * You should have received a copy of the GNU General Public License
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| 24 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 25 | *
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| 26 | * SPDX-License-Identifier: GPL-3.0-only
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[50460] | 27 | */
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| 28 |
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| 29 | #define LOG_GROUP LOG_GROUP_GUEST_DND
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| 30 | #include <VBox/log.h>
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| 31 |
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[62679] | 32 | #include <iprt/win/windows.h>
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[50460] | 33 | #include <new> /* For bad_alloc. */
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| 34 |
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| 35 | #include "UIDnDEnumFormat_win.h"
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| 36 | #include "UIDnDDataObject_win.h"
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| 37 |
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[52730] | 38 |
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[50460] | 39 | UIDnDEnumFormatEtc::UIDnDEnumFormatEtc(FORMATETC *pFormatEtc, ULONG cFormats)
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| 40 | : m_lRefCount(1),
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| 41 | m_nIndex(0)
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| 42 | {
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| 43 | HRESULT hr;
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| 44 |
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| 45 | try
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| 46 | {
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| 47 | LogFlowFunc(("pFormatEtc=%p, cFormats=%RU32\n", pFormatEtc, cFormats));
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| 48 | if (cFormats)
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| 49 | m_pFormatEtc = new FORMATETC[cFormats];
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| 50 |
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| 51 | for (ULONG i = 0; i < cFormats; i++)
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| 52 | {
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| 53 | LogFlowFunc(("Format %RU32: cfFormat=%RI16, sFormat=%s, tyMed=%RU32, dwAspect=%RU32\n",
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| 54 | i, pFormatEtc[i].cfFormat, UIDnDDataObject::ClipboardFormatToString(pFormatEtc[i].cfFormat),
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| 55 | pFormatEtc[i].tymed, pFormatEtc[i].dwAspect));
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| 56 | UIDnDEnumFormatEtc::CopyFormat(&m_pFormatEtc[i], &pFormatEtc[i]);
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| 57 | }
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| 58 |
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| 59 | m_nNumFormats = cFormats;
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| 60 | hr = S_OK;
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| 61 | }
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| 62 | catch (std::bad_alloc &)
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| 63 | {
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| 64 | hr = E_OUTOFMEMORY;
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| 65 | }
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| 66 |
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| 67 | LogFlowFunc(("hr=%Rhrc\n", hr));
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| 68 | }
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| 69 |
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| 70 | UIDnDEnumFormatEtc::~UIDnDEnumFormatEtc(void)
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| 71 | {
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| 72 | if (m_pFormatEtc)
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| 73 | {
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| 74 | for (ULONG i = 0; i < m_nNumFormats; i++)
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| 75 | {
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| 76 | if(m_pFormatEtc[i].ptd)
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| 77 | CoTaskMemFree(m_pFormatEtc[i].ptd);
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| 78 | }
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| 79 |
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| 80 | delete[] m_pFormatEtc;
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| 81 | m_pFormatEtc = NULL;
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| 82 | }
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| 83 |
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| 84 | LogFlowFunc(("m_lRefCount=%RI32\n", m_lRefCount));
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| 85 | }
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| 86 |
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| 87 | /*
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| 88 | * IUnknown methods.
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| 89 | */
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| 90 |
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| 91 | STDMETHODIMP_(ULONG) UIDnDEnumFormatEtc::AddRef(void)
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| 92 | {
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| 93 | return InterlockedIncrement(&m_lRefCount);
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| 94 | }
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| 95 |
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| 96 | STDMETHODIMP_(ULONG) UIDnDEnumFormatEtc::Release(void)
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| 97 | {
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| 98 | LONG lCount = InterlockedDecrement(&m_lRefCount);
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| 99 | if (lCount == 0)
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| 100 | {
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| 101 | delete this;
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| 102 | return 0;
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| 103 | }
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| 104 |
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| 105 | return lCount;
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| 106 | }
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| 107 |
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| 108 | STDMETHODIMP UIDnDEnumFormatEtc::QueryInterface(REFIID iid, void **ppvObject)
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| 109 | {
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| 110 | if ( iid == IID_IEnumFORMATETC
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| 111 | || iid == IID_IUnknown)
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| 112 | {
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| 113 | AddRef();
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| 114 | *ppvObject = this;
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| 115 | return S_OK;
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| 116 | }
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| 117 |
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| 118 | *ppvObject = 0;
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| 119 | return E_NOINTERFACE;
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| 120 | }
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| 121 |
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| 122 | STDMETHODIMP UIDnDEnumFormatEtc::Next(ULONG cFormats, FORMATETC *pFormatEtc, ULONG *pcFetched)
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| 123 | {
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| 124 | ULONG ulCopied = 0;
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| 125 |
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| 126 | if(cFormats == 0 || pFormatEtc == 0)
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| 127 | return E_INVALIDARG;
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| 128 |
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| 129 | while ( m_nIndex < m_nNumFormats
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| 130 | && ulCopied < cFormats)
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| 131 | {
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| 132 | UIDnDEnumFormatEtc::CopyFormat(&pFormatEtc[ulCopied],
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| 133 | &m_pFormatEtc[m_nIndex]);
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| 134 | ulCopied++;
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| 135 | m_nIndex++;
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| 136 | }
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| 137 |
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| 138 | if (pcFetched)
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| 139 | *pcFetched = ulCopied;
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| 140 |
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| 141 | return (ulCopied == cFormats) ? S_OK : S_FALSE;
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| 142 | }
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| 143 |
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| 144 | STDMETHODIMP UIDnDEnumFormatEtc::Skip(ULONG cFormats)
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| 145 | {
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| 146 | m_nIndex += cFormats;
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| 147 | return (m_nIndex <= m_nNumFormats) ? S_OK : S_FALSE;
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| 148 | }
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| 149 |
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| 150 | STDMETHODIMP UIDnDEnumFormatEtc::Reset(void)
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| 151 | {
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| 152 | m_nIndex = 0;
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| 153 | return S_OK;
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| 154 | }
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| 155 |
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| 156 | STDMETHODIMP UIDnDEnumFormatEtc::Clone(IEnumFORMATETC **ppEnumFormatEtc)
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| 157 | {
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| 158 | HRESULT hResult =
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| 159 | CreateEnumFormatEtc(m_nNumFormats, m_pFormatEtc, ppEnumFormatEtc);
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| 160 |
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| 161 | if (hResult == S_OK)
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| 162 | ((UIDnDEnumFormatEtc *) *ppEnumFormatEtc)->m_nIndex = m_nIndex;
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| 163 |
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| 164 | return hResult;
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| 165 | }
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| 166 |
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| 167 | /* static */
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| 168 | void UIDnDEnumFormatEtc::CopyFormat(FORMATETC *pDest, FORMATETC *pSource)
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| 169 | {
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| 170 | AssertPtrReturnVoid(pDest);
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| 171 | AssertPtrReturnVoid(pSource);
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| 172 |
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| 173 | *pDest = *pSource;
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| 174 |
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| 175 | if (pSource->ptd)
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| 176 | {
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| 177 | pDest->ptd = (DVTARGETDEVICE*)CoTaskMemAlloc(sizeof(DVTARGETDEVICE));
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| 178 | *(pDest->ptd) = *(pSource->ptd);
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| 179 | }
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| 180 | }
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| 181 |
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| 182 | /* static */
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| 183 | HRESULT UIDnDEnumFormatEtc::CreateEnumFormatEtc(UINT nNumFormats, FORMATETC *pFormatEtc, IEnumFORMATETC **ppEnumFormatEtc)
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| 184 | {
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| 185 | AssertPtrReturn(pFormatEtc, E_INVALIDARG);
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| 186 | AssertPtrReturn(ppEnumFormatEtc, E_INVALIDARG);
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| 187 |
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| 188 | HRESULT hr;
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| 189 | try
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| 190 | {
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| 191 | *ppEnumFormatEtc = new UIDnDEnumFormatEtc(pFormatEtc, nNumFormats);
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| 192 | hr = S_OK;
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| 193 | }
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| 194 | catch(std::bad_alloc &)
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| 195 | {
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| 196 | hr = E_OUTOFMEMORY;
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| 197 | }
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| 198 |
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| 199 | return hr;
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| 200 | }
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| 201 |
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