projects/activex/dataobject.cpp

   1 /*****************************************************************************
   2  * viewobject.cpp: ActiveX control for VLC
   3  *****************************************************************************
   4  * Copyright (C) 2005 VideoLAN
   5  *
   6  * Authors: Damien Fouilleul <Damien.Fouilleul@laposte.net>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 #include "plugin.h"
  24 #include "dataobject.h"
  25
  26 #include "utils.h"
  27
  28 using namespace std;
  29
  30 ////////////////////////////////////////////////////////////////////////////////////////////////
  31
  32 static const FORMATETC _metaFileFormatEtc =
  33     {
  34         CF_METAFILEPICT,
  35         NULL,
  36         DVASPECT_CONTENT,
  37         -1,
  38         TYMED_MFPICT,
  39     };
  40 static const FORMATETC _enhMetaFileFormatEtc =
  41     {
  42         CF_ENHMETAFILE,
  43         NULL,
  44         DVASPECT_CONTENT,
  45         -1,
  46         TYMED_ENHMF,
  47     };
  48
  49 class VLCEnumFORMATETC : public VLCEnumIterator<IID_IEnumFORMATETC,
  50     IEnumFORMATETC,
  51     FORMATETC,
  52     vector<FORMATETC>::iterator>
  53 {
  54 public:
  55     VLCEnumFORMATETC(vector<FORMATETC> v) :
  56         VLCEnumIterator<IID_IEnumFORMATETC,
  57         IEnumFORMATETC,
  58         FORMATETC,
  59         vector<FORMATETC>::iterator>(v.begin(), v.end())
  60     {};
  61 };
  62
  63 ////////////////////////////////////////////////////////////////////////////////////////////////
  64
  65 VLCDataObject::VLCDataObject(VLCPlugin *p_instance) : _p_instance(p_instance)
  66 {
  67     _v_formatEtc.push_back(_enhMetaFileFormatEtc);
  68     _v_formatEtc.push_back(_metaFileFormatEtc);
  69     CreateDataAdviseHolder(&_p_adviseHolder);
  70 };
  71
  72 VLCDataObject::~VLCDataObject()
  73 {
  74     _p_adviseHolder->Release();
  75 };
  76
  77 ////////////////////////////////////////////////////////////////////////////////////////////////
  78
  79 STDMETHODIMP VLCDataObject::DAdvise(LPFORMATETC pFormatEtc, DWORD padvf, LPADVISESINK pAdviseSink, LPDWORD pdwConnection)
  80 {
  81     return _p_adviseHolder->Advise(this,
  82             pFormatEtc, padvf,pAdviseSink, pdwConnection);
  83 };
  84
  85 STDMETHODIMP VLCDataObject::DUnadvise(DWORD dwConnection)
  86 {
  87     return _p_adviseHolder->Unadvise(dwConnection);
  88 };
  89
  90 STDMETHODIMP VLCDataObject::EnumDAdvise(IEnumSTATDATA **ppenumAdvise)
  91 {
  92     return _p_adviseHolder->EnumAdvise(ppenumAdvise);
  93 };
  94
  95 STDMETHODIMP VLCDataObject::EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC **ppEnum)
  96 {
  97     if( NULL == ppEnum )
  98         return E_POINTER;
  99
 100     *ppEnum = dynamic_cast<IEnumFORMATETC *>(new VLCEnumFORMATETC(_v_formatEtc));
 101
 102     return (NULL != *ppEnum ) ? S_OK : E_OUTOFMEMORY;
 103 };
 104
 105 STDMETHODIMP VLCDataObject::GetCanonicalFormatEtc(LPFORMATETC pFormatEtcIn, LPFORMATETC pFormatEtcOut)
 106 {
 107     HRESULT result = QueryGetData(pFormatEtcIn);
 108     if( FAILED(result) )
 109         return result;
 110
 111     if( NULL == pFormatEtcOut )
 112         return E_POINTER;
 113
 114     *pFormatEtcOut = *pFormatEtcIn;
 115     pFormatEtcOut->ptd = NULL;
 116
 117     return DATA_S_SAMEFORMATETC;
 118 };
 119
 120 STDMETHODIMP VLCDataObject::GetData(LPFORMATETC pFormatEtc, LPSTGMEDIUM pMedium)
 121 {
 122     if( NULL == pMedium )
 123         return E_POINTER;
 124
 125     HRESULT result = QueryGetData(pFormatEtc);
 126     if( SUCCEEDED(result) )
 127     {
 128         switch( pFormatEtc->cfFormat )
 129         {
 130             case CF_METAFILEPICT:
 131                 pMedium->tymed = TYMED_MFPICT;
 132                 pMedium->hMetaFilePict = NULL;
 133                 pMedium->pUnkForRelease = NULL;
 134                 result = getMetaFileData(pFormatEtc, pMedium);
 135                 break;
 136             case CF_ENHMETAFILE:
 137                 pMedium->tymed = TYMED_ENHMF;
 138                 pMedium->hEnhMetaFile = NULL;
 139                 pMedium->pUnkForRelease = NULL;
 140                 result = getEnhMetaFileData(pFormatEtc, pMedium);
 141                 break;
 142             default:
 143                 result = DV_E_FORMATETC;
 144         }
 145     }
 146     return result;
 147 };
 148
 149 STDMETHODIMP VLCDataObject::GetDataHere(LPFORMATETC pFormatEtc, LPSTGMEDIUM pMedium)
 150 {
 151     if( NULL == pMedium )
 152         return E_POINTER;
 153
 154     return E_NOTIMPL;
 155 }
 156
 157 ////////////////////////////////////////////////////////////////////////////////////////////////
 158
 159 HRESULT VLCDataObject::getMetaFileData(LPFORMATETC pFormatEtc, LPSTGMEDIUM pMedium)
 160 {
 161     HDC hicTargetDev = CreateDevDC(pFormatEtc->ptd);
 162     if( NULL == hicTargetDev )
 163         return E_FAIL;
 164
 165     HDC hdcMeta = CreateMetaFile(NULL);
 166     if( NULL != hdcMeta )
 167     {
 168         LPMETAFILEPICT pMetaFilePict = (LPMETAFILEPICT)CoTaskMemAlloc(sizeof(METAFILEPICT));
 169         if( NULL != pMetaFilePict )
 170         {
 171             SIZEL size = _p_instance->getExtent();
 172             RECTL wBounds = { 0L, 0L, size.cx, size.cy };
 173
 174             pMetaFilePict->mm   = MM_ANISOTROPIC;
 175             pMetaFilePict->xExt = size.cx;
 176             pMetaFilePict->yExt = size.cy;
 177
 178             DPFromHimetric(hicTargetDev, (LPPOINT)&size, 1);
 179
 180             SetMapMode(hdcMeta, MM_ANISOTROPIC);
 181             SetWindowExtEx(hdcMeta, size.cx, size.cy, NULL);
 182
 183             RECTL bounds = { 0L, 0L, size.cx, size.cy };
 184
 185             _p_instance->onDraw(pFormatEtc->ptd, hicTargetDev, hdcMeta, &bounds, &wBounds);
 186             pMetaFilePict->hMF = CloseMetaFile(hdcMeta);
 187             if( NULL != pMetaFilePict->hMF )
 188                 pMedium->hMetaFilePict = pMetaFilePict;
 189             else
 190                 CoTaskMemFree(pMetaFilePict);
 191         }
 192     }
 193     DeleteDC(hicTargetDev);
 194     return (NULL != pMedium->hMetaFilePict) ? S_OK : E_FAIL;
 195 };
 196
 197 HRESULT VLCDataObject::getEnhMetaFileData(LPFORMATETC pFormatEtc, LPSTGMEDIUM pMedium)
 198 {
 199     HDC hicTargetDev = CreateDevDC(pFormatEtc->ptd);
 200     if( NULL == hicTargetDev )
 201         return E_FAIL;
 202
 203     SIZEL size = _p_instance->getExtent();
 204
 205     HDC hdcMeta = CreateEnhMetaFile(hicTargetDev, NULL, NULL, NULL);
 206     if( NULL != hdcMeta )
 207     {
 208         RECTL wBounds = { 0L, 0L, size.cx, size.cy };
 209
 210         DPFromHimetric(hicTargetDev, (LPPOINT)&size, 1);
 211
 212         RECTL bounds = { 0L, 0L, size.cx, size.cy };
 213
 214         _p_instance->onDraw(pFormatEtc->ptd, hicTargetDev, hdcMeta, &bounds, &wBounds);
 215         pMedium->hEnhMetaFile = CloseEnhMetaFile(hdcMeta);
 216     }
 217     DeleteDC(hicTargetDev);
 218
 219     return (NULL != pMedium->hEnhMetaFile) ? S_OK : E_FAIL;
 220 };
 221
 222 STDMETHODIMP VLCDataObject::QueryGetData(LPFORMATETC pFormatEtc)
 223 {
 224     if( NULL == pFormatEtc )
 225         return E_POINTER;
 226
 227     const FORMATETC *formatEtc;
 228
 229     switch( pFormatEtc->cfFormat )
 230     {
 231         case CF_METAFILEPICT:
 232             formatEtc = &_metaFileFormatEtc;
 233             break;
 234         case CF_ENHMETAFILE:
 235             formatEtc = &_enhMetaFileFormatEtc;
 236             break;
 237         default:
 238             return DV_E_FORMATETC;
 239     }
 240
 241     if( pFormatEtc->dwAspect != formatEtc->dwAspect )
 242         return DV_E_DVASPECT;
 243
 244     if( pFormatEtc->lindex != formatEtc->lindex )
 245         return DV_E_LINDEX;
 246
 247     if( pFormatEtc->tymed != formatEtc->tymed )
 248         return DV_E_TYMED;
 249
 250     return S_OK;
 251 };
 252
 253 STDMETHODIMP VLCDataObject::SetData(LPFORMATETC pFormatEtc, LPSTGMEDIUM pMedium, BOOL fRelease)
 254 {
 255     return E_NOTIMPL;
 256 };
 257
 258 /*void VLCDataObject::onDataChange(void)
 259 {
 260     _p_adviseHolder->SendOnDataChange(this, 0, 0);
 261 };*/
 262
 263 void VLCDataObject::onClose(void)
 264 {
 265     _p_adviseHolder->SendOnDataChange(this, 0, ADVF_DATAONSTOP);
 266     if( S_OK == OleIsCurrentClipboard(dynamic_cast<LPDATAOBJECT>(this)) )
 267         OleFlushClipboard();
 268 };
 269