Clients/ExplorerPlugin/ClassFactory.cpp

   1 /* -*- Mode: C; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2003-2004 Apple Computer, Inc. All rights reserved.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16
  17     Change History (most recent first):
  18
  19 $Log: ClassFactory.cpp,v $
  20 Revision 1.3  2006/08/14 23:24:00  cheshire
  21 Re-licensed mDNSResponder daemon source code under Apache License, Version 2.0
  22
  23 Revision 1.2  2004/07/13 21:24:21  rpantos
  24 Fix for <rdar://problem/3701120>.
  25
  26 Revision 1.1  2004/06/18 04:34:59  rpantos
  27 Move to Clients from mDNSWindows
  28
  29 Revision 1.1  2004/01/30 03:01:56  bradley
  30 Explorer Plugin to browse for DNS-SD advertised Web and FTP servers from within Internet Explorer.
  31
  32 */
  33
  34 #include        "StdAfx.h"
  35
  36 #include        "DebugServices.h"
  37
  38 #include        "ExplorerBar.h"
  39 #include        "ExplorerPlugin.h"
  40
  41 #include        "ClassFactory.h"
  42
  43 // MFC Debugging
  44
  45 #ifdef _DEBUG
  46 #define new DEBUG_NEW
  47 #undef THIS_FILE
  48 static char THIS_FILE[] = __FILE__;
  49 #endif
  50
  51 //===========================================================================================================================
  52 //      ClassFactory
  53 //===========================================================================================================================
  54
  55 ClassFactory::ClassFactory( CLSID inCLSID )
  56 {
  57         mCLSIDObject    = inCLSID;
  58         mRefCount               = 1;
  59         ++gDLLRefCount;
  60 }
  61
  62 //===========================================================================================================================
  63 //      ~ClassFactory
  64 //===========================================================================================================================
  65
  66 ClassFactory::~ClassFactory( void )
  67 {
  68         check( gDLLRefCount > 0 );
  69
  70         --gDLLRefCount;
  71 }
  72
  73 #if 0
  74 #pragma mark -
  75 #pragma mark == IUnknown methods ==
  76 #endif
  77
  78 //===========================================================================================================================
  79 //      QueryInterface
  80 //===========================================================================================================================
  81
  82 STDMETHODIMP    ClassFactory::QueryInterface( REFIID inID, LPVOID *outResult )
  83 {
  84         HRESULT         err;
  85
  86         check( outResult );
  87
  88         if( IsEqualIID( inID, IID_IUnknown ) )
  89         {
  90                 *outResult = this;
  91         }
  92         else if( IsEqualIID( inID, IID_IClassFactory ) )
  93         {
  94                 *outResult = (IClassFactory *) this;
  95         }
  96         else
  97         {
  98                 *outResult = NULL;
  99                 err = E_NOINTERFACE;
 100                 goto exit;
 101         }
 102
 103         ( *( (LPUNKNOWN *) outResult ) )->AddRef();
 104         err = S_OK;
 105
 106 exit:
 107         return( err );
 108 }
 109
 110 //===========================================================================================================================
 111 //      AddRef
 112 //===========================================================================================================================
 113
 114 STDMETHODIMP_( DWORD )  ClassFactory::AddRef( void )
 115 {
 116         return( ++mRefCount );
 117 }
 118
 119 //===========================================================================================================================
 120 //      Release
 121 //===========================================================================================================================
 122
 123 STDMETHODIMP_( DWORD )  ClassFactory::Release( void )
 124 {
 125         DWORD           count;
 126
 127         count = --mRefCount;
 128         if( count == 0 )
 129         {
 130                 delete this;
 131         }
 132         return( count );
 133 }
 134
 135 #if 0
 136 #pragma mark -
 137 #pragma mark == IClassFactory methods ==
 138 #endif
 139
 140 //===========================================================================================================================
 141 //      CreateInstance
 142 //===========================================================================================================================
 143
 144 STDMETHODIMP    ClassFactory::CreateInstance( LPUNKNOWN inUnknown, REFIID inID, LPVOID *outObject )
 145 {
 146         HRESULT         err;
 147         LPVOID          obj;
 148
 149         check( outObject );
 150
 151         obj             = NULL;
 152         *outObject      = NULL;
 153         require_action( !inUnknown, exit, err = CLASS_E_NOAGGREGATION );
 154
 155         // Create the object based on the CLSID.
 156
 157         if( IsEqualCLSID( mCLSIDObject, CLSID_ExplorerBar ) )
 158         {
 159                 try
 160                 {
 161                         obj = new ExplorerBar();
 162                 }
 163                 catch( ... )
 164                 {
 165                         // Don't let exception escape.
 166                 }
 167                 require_action( obj, exit, err = E_OUTOFMEMORY );
 168         }
 169         else
 170         {
 171                 err = E_FAIL;
 172                 goto exit;
 173         }
 174
 175         // Query for the specified interface. Release the factory since QueryInterface retains it.
 176
 177         err = ( (LPUNKNOWN ) obj )->QueryInterface( inID, outObject );
 178         ( (LPUNKNOWN ) obj )->Release();
 179
 180 exit:
 181         return( err );
 182 }
 183
 184 //===========================================================================================================================
 185 //      LockServer
 186 //===========================================================================================================================
 187
 188 STDMETHODIMP    ClassFactory::LockServer( BOOL inLock )
 189 {
 190         DEBUG_UNUSED( inLock );
 191
 192         return( E_NOTIMPL );
 193 }