modules/rosapps/lib/vfdlib/vfdshcfact.cpp

   1 /*
   2         vfdshcfact.cpp
   3
   4         Virtual Floppy Drive for Windows
   5         Driver control library
   6         shell extension COM class factory class
   7
   8         Copyright (c) 2003-2005 Ken Kato
   9 */
  10
  11 #define WIN32_LEAN_AND_MEAN
  12 #include <windows.h>
  13 #include <shlobj.h>
  14
  15 #include "vfdtypes.h"
  16 #include "vfdlib.h"
  17 #include "vfdshext.h"
  18
  19 //      class header
  20 #include "vfdshcfact.h"
  21
  22 //
  23 //      constructor
  24 //
  25 CVfdFactory::CVfdFactory()
  26 {
  27         VFDTRACE(0, ("CVfdFactory::CVfdFactory()\n"));
  28
  29         m_cRefCnt = 0L;
  30
  31         g_cDllRefCnt++;
  32 }
  33
  34 //
  35 //      destructor
  36 //
  37 CVfdFactory::~CVfdFactory()
  38 {
  39         VFDTRACE(0, ("CVfdFactory::~CVfdFactory()\n"));
  40
  41         g_cDllRefCnt--;
  42 }
  43
  44 //
  45 //      IUnknown methods
  46 //
  47 STDMETHODIMP CVfdFactory::QueryInterface(
  48         REFIID                  riid,
  49         LPVOID                  *ppv)
  50 {
  51         VFDTRACE(0, ("CVfdFactory::QueryInterface()\n"));
  52
  53         *ppv = NULL;
  54
  55         if (IsEqualIID(riid, IID_IUnknown) ||
  56                 IsEqualIID(riid, IID_IClassFactory)) {
  57                 *ppv = (LPCLASSFACTORY)this;
  58
  59                 AddRef();
  60
  61                 return NOERROR;
  62         }
  63
  64         return E_NOINTERFACE;
  65 }
  66
  67 STDMETHODIMP_(ULONG) CVfdFactory::AddRef()
  68 {
  69         VFDTRACE(0, ("CVfdFactory::AddRef()\n"));
  70
  71         return ++m_cRefCnt;
  72 }
  73
  74 STDMETHODIMP_(ULONG) CVfdFactory::Release()
  75 {
  76         VFDTRACE(0, ("CVfdFactory::Release()\n"));
  77
  78         if (--m_cRefCnt) {
  79                 return m_cRefCnt;
  80         }
  81
  82 #ifndef __REACTOS__
  83         delete this;
  84 #endif
  85
  86         return 0L;
  87 }
  88
  89 //
  90 // IClassFactory methods
  91 //
  92 STDMETHODIMP CVfdFactory::CreateInstance(
  93         LPUNKNOWN               pUnkOuter,
  94         REFIID                  riid,
  95         LPVOID                  *ppvObj)
  96 {
  97         VFDTRACE(0, ("CVfdFactory::CreateInstance()\n"));
  98
  99         *ppvObj = NULL;
 100
 101         // Shell extensions typically don't support
 102         // aggregation (inheritance)
 103
 104         if (pUnkOuter) {
 105                 return CLASS_E_NOAGGREGATION;
 106         }
 107
 108         // Create the main shell extension object.
 109         // The shell will then call QueryInterface with IID_IShellExtInit
 110         // -- this is how shell extensions are initialized.
 111
 112         LPCVFDSHEXT pVfdShExt = new CVfdShExt;
 113
 114         if (!pVfdShExt) {
 115                 return E_OUTOFMEMORY;
 116         }
 117
 118         return pVfdShExt->QueryInterface(riid, ppvObj);
 119 }
 120
 121 STDMETHODIMP CVfdFactory::LockServer(BOOL fLock)
 122 {
 123         VFDTRACE(0, ("CVfdFactory::LockServer()\n"));
 124         UNREFERENCED_PARAMETER(fLock);
 125         return NOERROR;
 126 }