projects/activex/persiststorage.cpp

   1 /*****************************************************************************
   2  * persiststorage.cpp: ActiveX control for VLC
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   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 "persiststorage.h"
  25
  26 using namespace std;
  27
  28 STDMETHODIMP VLCPersistStorage::GetClassID(LPCLSID pClsID)
  29 {
  30     if( NULL == pClsID )
  31         return E_POINTER;
  32
  33     *pClsID = _p_instance->getClassID();
  34
  35     return S_OK;
  36 };
  37
  38 STDMETHODIMP VLCPersistStorage::IsDirty(void)
  39 {
  40     return _p_instance->isDirty() ? S_OK : S_FALSE;
  41 };
  42
  43 STDMETHODIMP VLCPersistStorage::InitNew(LPSTORAGE pStg)
  44 {
  45     return _p_instance->onInit();
  46 };
  47
  48 STDMETHODIMP VLCPersistStorage::Load(LPSTORAGE pStg)
  49 {
  50     if( NULL == pStg )
  51         return E_INVALIDARG;
  52
  53     LPSTREAM pStm = NULL;
  54     HRESULT result = pStg->OpenStream(L"VideoLAN ActiveX Plugin Data", NULL,
  55                         STGM_READ|STGM_SHARE_EXCLUSIVE, 0, &pStm);
  56
  57     if( FAILED(result) )
  58         return result;
  59
  60     LPPERSISTSTREAMINIT pPersistStreamInit;
  61     if( SUCCEEDED(QueryInterface(IID_IPersistStreamInit, (void **)&pPersistStreamInit)) )
  62     {
  63         result = pPersistStreamInit->Load(pStm);
  64         pPersistStreamInit->Release();
  65     }
  66
  67     pStm->Release();
  68
  69     return result;
  70 };
  71
  72 STDMETHODIMP VLCPersistStorage::Save(LPSTORAGE pStg, BOOL fSameAsLoad)
  73 {
  74     if( NULL == pStg )
  75         return E_INVALIDARG;
  76
  77     if( fSameAsLoad && (S_FALSE == IsDirty()) )
  78         return S_OK;
  79
  80     LPSTREAM pStm = NULL;
  81     HRESULT result = pStg->CreateStream(L"VideoLAN ActiveX Plugin Data",
  82                         STGM_CREATE|STGM_READWRITE|STGM_SHARE_EXCLUSIVE, 0, 0, &pStm);
  83
  84     if( FAILED(result) )
  85         return result;
  86
  87     LPPERSISTSTREAMINIT pPersistStreamInit;
  88     if( SUCCEEDED(QueryInterface(IID_IPersistStreamInit, (void **)&pPersistStreamInit)) )
  89     {
  90         result = pPersistStreamInit->Save(pStm, fSameAsLoad);
  91         pPersistStreamInit->Release();
  92     }
  93
  94     pStm->Release();
  95
  96     return result;
  97 };
  98
  99 STDMETHODIMP VLCPersistStorage::SaveCompleted(IStorage *pStg)
 100 {
 101     return S_OK;
 102 };
 103
 104 STDMETHODIMP VLCPersistStorage::HandsOffStorage(void)
 105 {
 106     return S_OK;
 107 };
 108