src/TortoiseShell/TortoiseGIT.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2003-2010, 2012, 2021-2023 - TortoiseSVN
   4 // Copyright (C) 2008-2012, 2014, 2016-2017 - TortoiseGit
   5
   6 // This program is free software; you can redistribute it and/or
   7 // modify it under the terms of the GNU General Public License
   8 // as published by the Free Software Foundation; either version 2
   9 // of the License, or (at your option) any later version.
  10
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software Foundation,
  18 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 //
  20 #include "stdafx.h"
  21 #include "ShellExt.h"
  22 #include "Guids.h"
  23 #include "ShellExtClassFactory.h"
  24 #include "ShellObjects.h"
  25
  26 volatile LONG           g_cRefThisDll = 0;                              ///< reference count of this DLL.
  27 HINSTANCE                       g_hmodThisDll = nullptr;                ///< handle to this DLL itself.
  28 ShellCache                      g_ShellCache;                                   ///< caching of registry entries, ...
  29 DWORD                           g_langid;
  30 ULONGLONG                       g_langTimeout = 0;
  31 HINSTANCE                       g_hResInst = nullptr;
  32 std::wstring            g_filepath;
  33 git_wc_status_kind      g_filestatus = git_wc_status_none;      ///< holds the corresponding status to the file/dir above
  34 bool                            g_readonlyoverlay = false;
  35 bool                            g_lockedoverlay = false;
  36
  37 bool                            g_normalovlloaded = false;
  38 bool                            g_modifiedovlloaded = false;
  39 bool                            g_conflictedovlloaded = false;
  40 bool                            g_readonlyovlloaded = false;
  41 bool                            g_deletedovlloaded = false;
  42 bool                            g_lockedovlloaded = false;
  43 bool                            g_addedovlloaded = false;
  44 bool                            g_ignoredovlloaded = false;
  45 bool                            g_unversionedovlloaded = false;
  46 CComCriticalSection     g_csGlobalCOMGuard;
  47
  48 LPCWSTR                         g_MenuIDString = L"TortoiseGit";
  49
  50 ShellObjects            g_shellObjects;
  51
  52 #pragma comment(linker, "\"/manifestdependency:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
  53
  54 extern "C" int APIENTRY
  55 DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID /* lpReserved */)
  56 {
  57 #ifdef _DEBUG
  58         // if no debugger is present, then don't load the dll.
  59         // this prevents other apps from loading the dll and locking
  60         // it.
  61
  62         bool bInShellTest = false;
  63         wchar_t buf[MAX_PATH + 1] = { 0 };              // MAX_PATH ok, the test really is for debugging anyway.
  64         const DWORD pathLength = GetModuleFileName(nullptr, buf, _countof(buf) - 1);
  65         if(pathLength >= 14)
  66         {
  67                 if (pathLength >= 24 && _wcsicmp(&buf[pathLength - 24], L"\\TortoiseGitExplorer.exe") == 0)
  68                         bInShellTest = true;
  69                 if ((_wcsicmp(&buf[pathLength-14], L"\\ShellTest.exe")) == 0)
  70                         bInShellTest = true;
  71                 if ((_wcsicmp(&buf[pathLength-13], L"\\verclsid.exe")) == 0)
  72                         bInShellTest = true;
  73         }
  74
  75         if (!::IsDebuggerPresent() && !bInShellTest)
  76         {
  77                 ATLTRACE("In debug load preventer\n");
  78                 return FALSE;
  79         }
  80 #endif
  81
  82         // NOTE: Do *NOT* call apr_initialize() or apr_terminate() here in DllMain(),
  83         // because those functions call LoadLibrary() indirectly through malloc().
  84         // And LoadLibrary() inside DllMain() is not allowed and can lead to unexpected
  85         // behavior and even may create dependency loops in the dll load order.
  86         if (dwReason == DLL_PROCESS_ATTACH)
  87         {
  88                 DisableThreadLibraryCalls(hInstance);
  89                 if (!g_hmodThisDll)
  90                         g_csGlobalCOMGuard.Init();
  91
  92                 // Extension DLL one-time initialization
  93                 g_hmodThisDll = hInstance;
  94         }
  95         else if (dwReason == DLL_PROCESS_DETACH)
  96         {
  97                 // do not clean up memory here:
  98                 // if an application doesn't release all COM objects
  99                 // but still unloads the dll, cleaning up ourselves
 100                 // will lead to crashes.
 101                 // better to leak some memory than to crash other apps.
 102                 // sometimes an application doesn't release all COM objects
 103                 // but still unloads the dll.
 104                 // in that case, we do it ourselves
 105                 g_csGlobalCOMGuard.Term();
 106         }
 107         return 1;       // ok
 108 }
 109
 110 STDAPI DllCanUnloadNow()
 111 {
 112         return (g_cRefThisDll == 0 ? S_OK : S_FALSE);
 113 }
 114
 115 STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppvOut)
 116 {
 117         if (!ppvOut)
 118                 return E_POINTER;
 119         *ppvOut = nullptr;
 120
 121         FileState state = FileStateInvalid;
 122         if (IsEqualIID(rclsid, CLSID_Tortoisegit_UPTODATE))
 123                 state = FileStateVersioned;
 124         else if (IsEqualIID(rclsid, CLSID_Tortoisegit_MODIFIED))
 125                 state = FileStateModified;
 126         else if (IsEqualIID(rclsid, CLSID_Tortoisegit_CONFLICTING))
 127                 state = FileStateConflict;
 128         else if (IsEqualIID(rclsid, CLSID_Tortoisegit_UNCONTROLLED))
 129                 state = FileStateUncontrolled;
 130         else if (IsEqualIID(rclsid, CLSID_Tortoisegit_DROPHANDLER))
 131                 state = FileStateDropHandler;
 132         else if (IsEqualIID(rclsid, CLSID_Tortoisegit_DELETED))
 133                 state = FileStateDeleted;
 134         else if (IsEqualIID(rclsid, CLSID_Tortoisegit_READONLY))
 135                 state = FileStateReadOnly;
 136         else if (IsEqualIID(rclsid, CLSID_Tortoisegit_LOCKED))
 137                 state = FileStateLockedOverlay;
 138         else if (IsEqualIID(rclsid, CLSID_Tortoisegit_ADDED))
 139                 state = FileStateAddedOverlay;
 140         else if (IsEqualIID(rclsid, CLSID_Tortoisegit_IGNORED))
 141                 state = FileStateIgnoredOverlay;
 142         else if (IsEqualIID(rclsid, CLSID_Tortoisegit_UNVERSIONED))
 143                 state = FileStateUnversionedOverlay;
 144         else if (IsEqualIID(rclsid, CLSID_Tortoisegit_EXPLORERCOMMAND))
 145                 state = FileStateVersioned;
 146
 147         if (state != FileStateInvalid)
 148         {
 149                 CShellExtClassFactory *pcf = new (std::nothrow) CShellExtClassFactory(state);
 150                 if (!pcf)
 151                         return E_OUTOFMEMORY;
 152                 // refcount currently set to 0
 153                 const HRESULT hr = pcf->QueryInterface(riid, ppvOut);
 154                 if(FAILED(hr))
 155                         delete pcf;
 156                 return hr;
 157         }
 158
 159         return CLASS_E_CLASSNOTAVAILABLE;
 160 }