1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_shell.hxx"
26 #include "internal/global.hxx"
27 #include "classfactory.hxx"
28 #include "internal/infotips.hxx"
29 #include "internal/propsheets.hxx"
30 #include "internal/columninfo.hxx"
31 #ifdef __MINGW32__
32 #include <algorithm>
33 using ::std::max;
34 using ::std::min;
35 #endif
36 #include "internal/thumbviewer.hxx"
37 #include "internal/shlxthdl.hxx"
38
39 //-----------------------------
40 //
41 //-----------------------------
42
43 long CClassFactory::s_ServerLocks = 0;
44
45 //-----------------------------
46 //
47 //-----------------------------
48
CClassFactory(const CLSID & clsid)49 CClassFactory::CClassFactory(const CLSID& clsid) :
50 m_RefCnt(1),
51 m_Clsid(clsid)
52 {
53 InterlockedIncrement(&g_DllRefCnt);
54 }
55
56 //-----------------------------
57 //
58 //-----------------------------
59
~CClassFactory()60 CClassFactory::~CClassFactory()
61 {
62 InterlockedDecrement(&g_DllRefCnt);
63 }
64
65 //-----------------------------
66 // IUnknown methods
67 //-----------------------------
68
QueryInterface(REFIID riid,void __RPC_FAR * __RPC_FAR * ppvObject)69 HRESULT STDMETHODCALLTYPE CClassFactory::QueryInterface(REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject)
70 {
71 *ppvObject = 0;
72
73 if (IID_IUnknown == riid || IID_IClassFactory == riid)
74 {
75 IUnknown* pUnk = this;
76 pUnk->AddRef();
77 *ppvObject = pUnk;
78 return S_OK;
79 }
80
81 return E_NOINTERFACE;
82 }
83
84 //-----------------------------
85 //
86 //-----------------------------
87
AddRef(void)88 ULONG STDMETHODCALLTYPE CClassFactory::AddRef(void)
89 {
90 return InterlockedIncrement(&m_RefCnt);
91 }
92
93 //-----------------------------
94 //
95 //-----------------------------
96
Release(void)97 ULONG STDMETHODCALLTYPE CClassFactory::Release(void)
98 {
99 long refcnt = InterlockedDecrement(&m_RefCnt);
100
101 if (0 == refcnt)
102 delete this;
103
104 return refcnt;
105 }
106
107 //-----------------------------
108 // IClassFactory methods
109 //-----------------------------
110
CreateInstance(IUnknown __RPC_FAR * pUnkOuter,REFIID riid,void __RPC_FAR * __RPC_FAR * ppvObject)111 HRESULT STDMETHODCALLTYPE CClassFactory::CreateInstance(
112 IUnknown __RPC_FAR *pUnkOuter,
113 REFIID riid,
114 void __RPC_FAR *__RPC_FAR *ppvObject)
115 {
116 if ((pUnkOuter != NULL))
117 return CLASS_E_NOAGGREGATION;
118
119 IUnknown* pUnk = 0;
120
121 if (CLSID_PROPERTYSHEET_HANDLER == m_Clsid)
122 pUnk = static_cast<IShellExtInit*>(new CPropertySheet());
123
124 else if (CLSID_INFOTIP_HANDLER == m_Clsid)
125 pUnk = static_cast<IQueryInfo*>(new CInfoTip());
126
127 else if (CLSID_COLUMN_HANDLER == m_Clsid)
128 pUnk = static_cast<IColumnProvider*>(new CColumnInfo());
129
130 else if (CLSID_THUMBVIEWER_HANDLER == m_Clsid)
131 pUnk = static_cast<IExtractImage*>(new CThumbviewer());
132
133 POST_CONDITION(pUnk != 0, "Could not create COM object");
134
135 if (0 == pUnk)
136 return E_OUTOFMEMORY;
137
138 HRESULT hr = pUnk->QueryInterface(riid, ppvObject);
139
140 // if QueryInterface failed the component will destroy itself
141 pUnk->Release();
142
143 return hr;
144 }
145
146 //-----------------------------
147 //
148 //-----------------------------
149
LockServer(BOOL fLock)150 HRESULT STDMETHODCALLTYPE CClassFactory::LockServer(BOOL fLock)
151 {
152 if (fLock)
153 InterlockedIncrement(&s_ServerLocks);
154 else
155 InterlockedDecrement(&s_ServerLocks);
156
157 return S_OK;
158 }
159
160 //-----------------------------
161 //
162 //-----------------------------
163
IsLocked()164 bool CClassFactory::IsLocked()
165 {
166 return (s_ServerLocks > 0);
167 }
168