Clients/ExplorerPlugin/ClassFactory.cpp

   1 /*
   2  * Copyright (c) 2003-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22
  23     Change History (most recent first):
  24
  25 $Log: ClassFactory.cpp,v $
  26 Revision 1.2  2004/07/13 21:24:21  rpantos
  27 Fix for <rdar://problem/3701120>.
  28
  29 Revision 1.1  2004/06/18 04:34:59  rpantos
  30 Move to Clients from mDNSWindows
  31
  32 Revision 1.1  2004/01/30 03:01:56  bradley
  33 Explorer Plugin to browse for DNS-SD advertised Web and FTP servers from within Internet Explorer.
  34
  35 */
  36
  37 #include        "StdAfx.h"
  38
  39 #include        "DebugServices.h"
  40
  41 #include        "ExplorerBar.h"
  42 #include        "ExplorerPlugin.h"
  43
  44 #include        "ClassFactory.h"
  45
  46 // MFC Debugging
  47
  48 #ifdef _DEBUG
  49 #define new DEBUG_NEW
  50 #undef THIS_FILE
  51 static char THIS_FILE[] = __FILE__;
  52 #endif
  53
  54 //===========================================================================================================================
  55 //      ClassFactory
  56 //===========================================================================================================================
  57
  58 ClassFactory::ClassFactory( CLSID inCLSID )
  59 {
  60         mCLSIDObject    = inCLSID;
  61         mRefCount               = 1;
  62         ++gDLLRefCount;
  63 }
  64
  65 //===========================================================================================================================
  66 //      ~ClassFactory
  67 //===========================================================================================================================
  68
  69 ClassFactory::~ClassFactory( void )
  70 {
  71         check( gDLLRefCount > 0 );
  72
  73         --gDLLRefCount;
  74 }
  75
  76 #if 0
  77 #pragma mark -
  78 #pragma mark == IUnknown methods ==
  79 #endif
  80
  81 //===========================================================================================================================
  82 //      QueryInterface
  83 //===========================================================================================================================
  84
  85 STDMETHODIMP    ClassFactory::QueryInterface( REFIID inID, LPVOID *outResult )
  86 {
  87         HRESULT         err;
  88
  89         check( outResult );
  90
  91         if( IsEqualIID( inID, IID_IUnknown ) )
  92         {
  93                 *outResult = this;
  94         }
  95         else if( IsEqualIID( inID, IID_IClassFactory ) )
  96         {
  97                 *outResult = (IClassFactory *) this;
  98         }
  99         else
 100         {
 101                 *outResult = NULL;
 102                 err = E_NOINTERFACE;
 103                 goto exit;
 104         }
 105
 106         ( *( (LPUNKNOWN *) outResult ) )->AddRef();
 107         err = S_OK;
 108
 109 exit:
 110         return( err );
 111 }
 112
 113 //===========================================================================================================================
 114 //      AddRef
 115 //===========================================================================================================================
 116
 117 STDMETHODIMP_( DWORD )  ClassFactory::AddRef( void )
 118 {
 119         return( ++mRefCount );
 120 }
 121
 122 //===========================================================================================================================
 123 //      Release
 124 //===========================================================================================================================
 125
 126 STDMETHODIMP_( DWORD )  ClassFactory::Release( void )
 127 {
 128         DWORD           count;
 129
 130         count = --mRefCount;
 131         if( count == 0 )
 132         {
 133                 delete this;
 134         }
 135         return( count );
 136 }
 137
 138 #if 0
 139 #pragma mark -
 140 #pragma mark == IClassFactory methods ==
 141 #endif
 142
 143 //===========================================================================================================================
 144 //      CreateInstance
 145 //===========================================================================================================================
 146
 147 STDMETHODIMP    ClassFactory::CreateInstance( LPUNKNOWN inUnknown, REFIID inID, LPVOID *outObject )
 148 {
 149         HRESULT         err;
 150         LPVOID          obj;
 151
 152         check( outObject );
 153
 154         obj             = NULL;
 155         *outObject      = NULL;
 156         require_action( !inUnknown, exit, err = CLASS_E_NOAGGREGATION );
 157
 158         // Create the object based on the CLSID.
 159
 160         if( IsEqualCLSID( mCLSIDObject, CLSID_ExplorerBar ) )
 161         {
 162                 try
 163                 {
 164                         obj = new ExplorerBar();
 165                 }
 166                 catch( ... )
 167                 {
 168                         // Don't let exception escape.
 169                 }
 170                 require_action( obj, exit, err = E_OUTOFMEMORY );
 171         }
 172         else
 173         {
 174                 err = E_FAIL;
 175                 goto exit;
 176         }
 177
 178         // Query for the specified interface. Release the factory since QueryInterface retains it.
 179
 180         err = ( (LPUNKNOWN ) obj )->QueryInterface( inID, outObject );
 181         ( (LPUNKNOWN ) obj )->Release();
 182
 183 exit:
 184         return( err );
 185 }
 186
 187 //===========================================================================================================================
 188 //      LockServer
 189 //===========================================================================================================================
 190
 191 STDMETHODIMP    ClassFactory::LockServer( BOOL inLock )
 192 {
 193         DEBUG_UNUSED( inLock );
 194
 195         return( E_NOTIMPL );
 196 }