src/TortoiseOverlays/ShellExtClassFactory.cpp

   1 // TortoiseOverlays - an overlay handler for Tortoise clients\r
   2 // Copyright (C) 2007 - TortoiseSVN\r
   3 #include "stdafx.h"\r
   4 #include "ShellExt.h"\r
   5 #include "ShellExtClassFactory.h"\r
   6 \r
   7 \r
   8 CShellExtClassFactory::CShellExtClassFactory(FileState state)\r
   9 {\r
  10     m_StateToMake = state;\r
  11 \r
  12     m_cRef = 0L;\r
  13         \r
  14     g_cRefThisDll++; \r
  15 }\r
  16 \r
  17 CShellExtClassFactory::~CShellExtClassFactory()          \r
  18 {\r
  19     g_cRefThisDll--;\r
  20 }\r
  21 \r
  22 STDMETHODIMP CShellExtClassFactory::QueryInterface(REFIID riid,\r
  23                                                    LPVOID FAR *ppv)\r
  24 {\r
  25     *ppv = NULL;\r
  26 \r
  27     // Any interface on this object is the object pointer\r
  28         \r
  29     if (IsEqualIID(riid, IID_IUnknown) || IsEqualIID(riid, IID_IClassFactory))\r
  30     {\r
  31         *ppv = (LPCLASSFACTORY)this;\r
  32                 \r
  33         AddRef();\r
  34                 \r
  35         return NOERROR;\r
  36     }\r
  37         \r
  38     return E_NOINTERFACE;\r
  39 }  \r
  40 \r
  41 STDMETHODIMP_(ULONG) CShellExtClassFactory::AddRef()\r
  42 {\r
  43     return ++m_cRef;\r
  44 }\r
  45 \r
  46 STDMETHODIMP_(ULONG) CShellExtClassFactory::Release()\r
  47 {\r
  48     if (--m_cRef)\r
  49         return m_cRef;\r
  50 \r
  51     delete this;\r
  52         \r
  53     return 0L;\r
  54 }\r
  55 \r
  56 STDMETHODIMP CShellExtClassFactory::CreateInstance(LPUNKNOWN pUnkOuter,\r
  57                                                                                                    REFIID riid,\r
  58                                                                                                    LPVOID *ppvObj)\r
  59 {\r
  60     *ppvObj = NULL;\r
  61         \r
  62     // Shell extensions typically don't support aggregation (inheritance)\r
  63         \r
  64     if (pUnkOuter)\r
  65         return CLASS_E_NOAGGREGATION;\r
  66         \r
  67     // Create the main shell extension object.  The shell will then call\r
  68     // QueryInterface with IID_IShellExtInit--this is how shell extensions are\r
  69     // initialized.\r
  70         \r
  71     CShellExt* pShellExt = new CShellExt(m_StateToMake);  //Create the CShellExt object\r
  72                 \r
  73     if (NULL == pShellExt)\r
  74         return E_OUTOFMEMORY;\r
  75         \r
  76     return pShellExt->QueryInterface(riid, ppvObj);\r
  77 }\r
  78 \r
  79 \r
  80 STDMETHODIMP CShellExtClassFactory::LockServer(BOOL /*fLock*/)\r
  81 {\r
  82     return E_NOTIMPL;\r
  83 }\r