shell/source/win32/shlxthandler/ooofilt/proxy/ooofiltproxy.cxx

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2008 by Sun Microsystems, Inc.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * $RCSfile: ooofiltproxy.cxx,v $
  10  * $Revision: 1.8 $
  11  *
  12  * This file is part of OpenOffice.org.
  13  *
  14  * OpenOffice.org is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU Lesser General Public License version 3
  16  * only, as published by the Free Software Foundation.
  17  *
  18  * OpenOffice.org is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU Lesser General Public License version 3 for more details
  22  * (a copy is included in the LICENSE file that accompanied this code).
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * version 3 along with OpenOffice.org.  If not, see
  26  * <http://www.openoffice.org/license.html>
  27  * for a copy of the LGPLv3 License.
  28  *
  29  ************************************************************************/
  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_shell.hxx"
  33
  34 #if defined _MSC_VER
  35 #pragma warning(push, 1)
  36 #endif
  37 #include <windows.h>
  38 #if defined _MSC_VER
  39 #pragma warning(pop)
  40 #endif
  41 #include <tchar.h>
  42 #ifdef __MINGW32__
  43 #include <basetyps.h>
  44 #endif
  45
  46
  47 /*
  48     The indexing filter library ooofilt.dll is linked against a couple
  49     of libaries (e.g. stlport, uwinapi, ...) which are not standard on
  50     a windows system. Unfortunately the library will be loaded by the
  51     indexing service via LoadLibrary so that the libraries ooofilt.dll
  52     depends on need to be in one of the standard search directories or
  53     the <office installation> directory need to be added to the PATH
  54     environment variable. In order to prevent failures while loading
  55     the ooofilt.dll we're installing and registering this proxy library
  56     which will load ooofilt.dll using LoadLibraryEx with the flag
  57     LOAD_WITH_ALTERED_SEARCH_PATH (see MSDN for details). This approach
  58     ensures that all libraries ooofilt.dll depends on will be found.
  59 */
  60
  61 typedef HRESULT (__stdcall * Forward_DllGetClassObject_t)(REFCLSID cid, REFIID iid, void** ppvObj);
  62 typedef HRESULT (__stdcall * Forward_DllCanUnloadNow_t)();
  63 typedef HRESULT (__stdcall * Forward_DllRegisterServer_t)();
  64 typedef HRESULT (__stdcall * Forward_DllUnregisterServer_t)();
  65
  66 Forward_DllGetClassObject_t Forward_DllGetClassObject = NULL;
  67 Forward_DllCanUnloadNow_t Forward_DllCanUnloadNow = NULL;
  68 Forward_DllRegisterServer_t Forward_DllRegisterServer = NULL;
  69 Forward_DllUnregisterServer_t Forward_DllUnregisterServer = NULL;
  70
  71 HMODULE hOoofilt = NULL;
  72 HMODULE hThisLibrary = NULL;
  73
  74 /* Truncates the file name from an absolute path but
  75    leaves the final '\' */
  76 void PathTruncateFileName(TCHAR* path)
  77 {
  78     TCHAR* p = path + lstrlen(path);
  79     while (*p != _T('\\')) p--;
  80     p++;
  81     *p = 0;
  82 }
  83
  84 void Init()
  85 {
  86     if (Forward_DllGetClassObject == NULL)
  87     {
  88         TCHAR buff[MAX_PATH];
  89         GetModuleFileName(hThisLibrary, buff, (sizeof(buff)/sizeof(TCHAR)));
  90         PathTruncateFileName(buff);
  91         lstrcat(buff, TEXT("ooofilt.dll"));
  92
  93         hOoofilt = LoadLibraryEx(buff, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
  94
  95         if (hOoofilt)
  96         {
  97             Forward_DllGetClassObject = reinterpret_cast<Forward_DllGetClassObject_t>(
  98                 GetProcAddress(hOoofilt, "DllGetClassObject"));
  99             Forward_DllCanUnloadNow = reinterpret_cast<Forward_DllCanUnloadNow_t>(
 100                 GetProcAddress(hOoofilt, "DllCanUnloadNow"));
 101             Forward_DllRegisterServer = reinterpret_cast<Forward_DllRegisterServer_t>(
 102                 GetProcAddress(hOoofilt, "DllRegisterServer"));
 103             Forward_DllUnregisterServer = reinterpret_cast<Forward_DllUnregisterServer_t>(
 104                 GetProcAddress(hOoofilt, "DllUnregisterServer"));
 105         }
 106     }
 107 }
 108
 109 extern "C" BOOL WINAPI DllMain(HMODULE hInstance, DWORD fdwReason, LPVOID /*lpvReserved*/)
 110 {
 111     switch (fdwReason)
 112     {
 113     case DLL_PROCESS_ATTACH:
 114         DisableThreadLibraryCalls( hInstance );
 115         hThisLibrary = hInstance;
 116         break;
 117     case DLL_PROCESS_DETACH:
 118         if (hOoofilt)
 119             FreeLibrary(hOoofilt);
 120         break;
 121     default:
 122         break;
 123     }
 124     return TRUE;
 125 }
 126
 127 extern "C" HRESULT __stdcall DllGetClassObject(REFCLSID cid, REFIID iid, void** ppvObj)
 128 {
 129     Init();
 130
 131     if (Forward_DllGetClassObject)
 132         return Forward_DllGetClassObject(cid, iid, ppvObj);
 133     else
 134         return E_FAIL;
 135 }
 136
 137 extern "C" HRESULT __stdcall DllCanUnloadNow()
 138 {
 139     Init();
 140
 141     if (Forward_DllCanUnloadNow)
 142         return Forward_DllCanUnloadNow();
 143     else
 144         return E_FAIL;
 145 }
 146
 147 extern "C" HRESULT __stdcall DllRegisterServer()
 148 {
 149     Init();
 150     if (Forward_DllRegisterServer)
 151         return Forward_DllRegisterServer();
 152     else
 153         return E_FAIL;
 154 }
 155
 156 extern "C" HRESULT __stdcall DllUnregisterServer()
 157 {
 158     Init();
 159
 160     if (Forward_DllUnregisterServer)
 161         return Forward_DllUnregisterServer();
 162     else
 163         return E_FAIL;
 164 }