shell/source/win32/shlxthandler/classfactory.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "internal/global.hxx"
  21 #include "classfactory.hxx"
  22 #include "internal/infotips.hxx"
  23 #include "internal/propsheets.hxx"
  24 #include "internal/columninfo.hxx"
  25 #ifdef __MINGW32__
  26 #include <algorithm>
  27 using ::std::max;
  28 using ::std::min;
  29 #endif
  30 #include "internal/thumbviewer.hxx"
  31 #include "internal/shlxthdl.hxx"
  32
  33
  34
  35 long CClassFactory::s_ServerLocks = 0;
  36
  37
  38
  39 CClassFactory::CClassFactory(const CLSID& clsid) :
  40     m_RefCnt(1),
  41     m_Clsid(clsid)
  42 {
  43     InterlockedIncrement(&g_DllRefCnt);
  44 }
  45
  46
  47
  48 CClassFactory::~CClassFactory()
  49 {
  50     InterlockedDecrement(&g_DllRefCnt);
  51 }
  52
  53
  54 // IUnknown methods
  55
  56
  57 HRESULT STDMETHODCALLTYPE CClassFactory::QueryInterface(REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject)
  58 {
  59     *ppvObject = 0;
  60
  61     if (IID_IUnknown == riid || IID_IClassFactory == riid)
  62     {
  63         IUnknown* pUnk = this;
  64         pUnk->AddRef();
  65         *ppvObject = pUnk;
  66         return S_OK;
  67     }
  68
  69     return E_NOINTERFACE;
  70 }
  71
  72
  73
  74 ULONG STDMETHODCALLTYPE CClassFactory::AddRef()
  75 {
  76     return InterlockedIncrement(&m_RefCnt);
  77 }
  78
  79
  80
  81 ULONG STDMETHODCALLTYPE CClassFactory::Release()
  82 {
  83     long refcnt = InterlockedDecrement(&m_RefCnt);
  84
  85     if (0 == refcnt)
  86         delete this;
  87
  88     return refcnt;
  89 }
  90
  91
  92 // IClassFactory methods
  93
  94
  95 HRESULT STDMETHODCALLTYPE CClassFactory::CreateInstance(
  96             IUnknown __RPC_FAR *pUnkOuter,
  97             REFIID riid,
  98             void __RPC_FAR *__RPC_FAR *ppvObject)
  99 {
 100     if ((pUnkOuter != NULL))
 101         return CLASS_E_NOAGGREGATION;
 102
 103     IUnknown* pUnk = 0;
 104
 105     if (CLSID_PROPERTYSHEET_HANDLER == m_Clsid)
 106         pUnk = static_cast<IShellExtInit*>(new CPropertySheet());
 107
 108     else if (CLSID_INFOTIP_HANDLER == m_Clsid)
 109         pUnk = static_cast<IQueryInfo*>(new CInfoTip());
 110
 111     else if (CLSID_COLUMN_HANDLER == m_Clsid)
 112         pUnk = static_cast<IColumnProvider*>(new CColumnInfo());
 113
 114     else if (CLSID_THUMBVIEWER_HANDLER == m_Clsid)
 115         pUnk = static_cast<IExtractImage*>(new CThumbviewer());
 116
 117     if (0 == pUnk)
 118     {
 119         return E_OUTOFMEMORY;
 120     }
 121
 122     HRESULT hr = pUnk->QueryInterface(riid, ppvObject);
 123
 124     // if QueryInterface failed the component will destroy itself
 125     pUnk->Release();
 126
 127     return hr;
 128 }
 129
 130
 131
 132 HRESULT STDMETHODCALLTYPE CClassFactory::LockServer(BOOL fLock)
 133 {
 134     if (fLock)
 135         InterlockedIncrement(&s_ServerLocks);
 136     else
 137         InterlockedDecrement(&s_ServerLocks);
 138
 139     return S_OK;
 140 }
 141
 142
 143
 144 bool CClassFactory::IsLocked()
 145 {
 146     return (s_ServerLocks > 0);
 147 }
 148
 149 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */