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 #undef OSL_DEBUG_LEVEL
  21
  22
  23 #include <osl/diagnose.h>
  24
  25 #include "internal/global.hxx"
  26 #include "classfactory.hxx"
  27 #include "internal/infotips.hxx"
  28 #include "internal/propsheets.hxx"
  29 #include "internal/columninfo.hxx"
  30 #ifdef __MINGW32__
  31 #include <algorithm>
  32 using ::std::max;
  33 using ::std::min;
  34 #endif
  35 #include "internal/thumbviewer.hxx"
  36 #include "internal/shlxthdl.hxx"
  37
  38 //-----------------------------
  39
  40 long CClassFactory::s_ServerLocks = 0;
  41
  42 //-----------------------------
  43
  44 CClassFactory::CClassFactory(const CLSID& clsid) :
  45     m_RefCnt(1),
  46     m_Clsid(clsid)
  47 {
  48     InterlockedIncrement(&g_DllRefCnt);
  49 }
  50
  51 //-----------------------------
  52
  53 CClassFactory::~CClassFactory()
  54 {
  55     InterlockedDecrement(&g_DllRefCnt);
  56 }
  57
  58 //-----------------------------
  59 // IUnknown methods
  60 //-----------------------------
  61
  62 HRESULT STDMETHODCALLTYPE CClassFactory::QueryInterface(REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject)
  63 {
  64     *ppvObject = 0;
  65
  66     if (IID_IUnknown == riid || IID_IClassFactory == riid)
  67     {
  68         IUnknown* pUnk = this;
  69         pUnk->AddRef();
  70         *ppvObject = pUnk;
  71         return S_OK;
  72     }
  73
  74     return E_NOINTERFACE;
  75 }
  76
  77 //-----------------------------
  78
  79 ULONG STDMETHODCALLTYPE CClassFactory::AddRef(void)
  80 {
  81     return InterlockedIncrement(&m_RefCnt);
  82 }
  83
  84 //-----------------------------
  85
  86 ULONG STDMETHODCALLTYPE CClassFactory::Release(void)
  87 {
  88     long refcnt = InterlockedDecrement(&m_RefCnt);
  89
  90     if (0 == refcnt)
  91         delete this;
  92
  93     return refcnt;
  94 }
  95
  96 //-----------------------------
  97 // IClassFactory methods
  98 //-----------------------------
  99
 100 HRESULT STDMETHODCALLTYPE CClassFactory::CreateInstance(
 101             IUnknown __RPC_FAR *pUnkOuter,
 102             REFIID riid,
 103             void __RPC_FAR *__RPC_FAR *ppvObject)
 104 {
 105     if ((pUnkOuter != NULL))
 106         return CLASS_E_NOAGGREGATION;
 107
 108     IUnknown* pUnk = 0;
 109
 110     if (CLSID_PROPERTYSHEET_HANDLER == m_Clsid)
 111         pUnk = static_cast<IShellExtInit*>(new CPropertySheet());
 112
 113     else if (CLSID_INFOTIP_HANDLER == m_Clsid)
 114         pUnk = static_cast<IQueryInfo*>(new CInfoTip());
 115
 116     else if (CLSID_COLUMN_HANDLER == m_Clsid)
 117         pUnk = static_cast<IColumnProvider*>(new CColumnInfo());
 118
 119     else if (CLSID_THUMBVIEWER_HANDLER == m_Clsid)
 120         pUnk = static_cast<IExtractImage*>(new CThumbviewer());
 121
 122     OSL_POSTCOND(pUnk != 0, "Could not create COM object");
 123
 124     if (0 == pUnk)
 125         return E_OUTOFMEMORY;
 126
 127     HRESULT hr = pUnk->QueryInterface(riid, ppvObject);
 128
 129     // if QueryInterface failed the component will destroy itself
 130     pUnk->Release();
 131
 132     return hr;
 133 }
 134
 135 //-----------------------------
 136
 137 HRESULT STDMETHODCALLTYPE CClassFactory::LockServer(BOOL fLock)
 138 {
 139     if (fLock)
 140         InterlockedIncrement(&s_ServerLocks);
 141     else
 142         InterlockedDecrement(&s_ServerLocks);
 143
 144     return S_OK;
 145 }
 146
 147 //-----------------------------
 148
 149 bool CClassFactory::IsLocked()
 150 {
 151     return (s_ServerLocks > 0);
 152 }
 153
 154 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */