src/Utils/ShellUpdater.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2012 - TortoiseGit
   4 // Copyright (C) 2003-2008,2011 - TortoiseSVN
   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 "Shellupdater.h"
  22 #include "../TGitCache/CacheInterface.h"
  23 #include "registry.h"
  24 #include "git.h"
  25 #include "SmartHandle.h"
  26
  27 CShellUpdater::CShellUpdater(void)
  28 {
  29         m_hInvalidationEvent = CreateEvent(NULL, FALSE, FALSE, _T("TortoiseGitCacheInvalidationEvent"));
  30 }
  31
  32 CShellUpdater::~CShellUpdater(void)
  33 {
  34         Flush();
  35
  36         CloseHandle(m_hInvalidationEvent);
  37 }
  38
  39 CShellUpdater& CShellUpdater::Instance()
  40 {
  41         static CShellUpdater instance;
  42         return instance;
  43 }
  44
  45 /**
  46 * Add a single path for updating.
  47 * The update will happen at some suitable time in the future
  48 */
  49 void CShellUpdater::AddPathForUpdate(const CTGitPath& path)
  50 {
  51         // Tell the shell extension to purge its cache - we'll redo this when
  52         // we actually do the shell-updates, but sometimes there's an earlier update, which
  53         // might benefit from cache invalidation
  54         SetEvent(m_hInvalidationEvent);
  55
  56         m_pathsForUpdating.AddPath(path);
  57 }
  58 /**
  59 * Add a list of paths for updating.
  60 * The update will happen when the list is destroyed, at the end of execution
  61 */
  62 void CShellUpdater::AddPathsForUpdate(const CTGitPathList& pathList)
  63 {
  64         for(int nPath=0; nPath < pathList.GetCount(); nPath++)
  65         {
  66                 AddPathForUpdate(pathList[nPath]);
  67         }
  68 }
  69
  70 void CShellUpdater::Flush()
  71 {
  72         if(m_pathsForUpdating.GetCount() > 0)
  73         {
  74                 ATLTRACE("Flushing shell update list\n");
  75
  76                 UpdateShell();
  77                 m_pathsForUpdating.Clear();
  78         }
  79 }
  80
  81 void CShellUpdater::UpdateShell()
  82 {
  83         // Tell the shell extension to purge its cache
  84         ATLTRACE("Setting cache invalidation event %d\n", GetTickCount());
  85         SetEvent(m_hInvalidationEvent);
  86
  87         // We use the SVN 'notify' call-back to add items to the list
  88         // Because this might call-back more than once per file (for example, when committing)
  89         // it's possible that there may be duplicates in the list.
  90         // There's no point asking the shell to do more than it has to, so we remove the duplicates before
  91         // passing the list on
  92         m_pathsForUpdating.RemoveDuplicates();
  93
  94         // if we use the external cache, we tell the cache directly that something
  95         // has changed, without the detour via the shell.
  96         CAutoFile hPipe = CreateFile(
  97                 GetCacheCommandPipeName(),              // pipe name
  98                 GENERIC_READ |                                  // read and write access
  99                 GENERIC_WRITE,
 100                 0,                                                              // no sharing
 101                 NULL,                                                   // default security attributes
 102                 OPEN_EXISTING,                                  // opens existing pipe
 103                 FILE_FLAG_OVERLAPPED,                   // default attributes
 104                 NULL);                                                  // no template file
 105
 106
 107         if (!hPipe)
 108         {
 109                 // The pipe connected; change to message-read mode.
 110                 DWORD dwMode;
 111
 112                 dwMode = PIPE_READMODE_MESSAGE;
 113                 if(SetNamedPipeHandleState(
 114                         hPipe,    // pipe handle
 115                         &dwMode,  // new pipe mode
 116                         NULL,     // don't set maximum bytes
 117                         NULL))    // don't set maximum time
 118                 {
 119                         CTGitPath path;
 120                         for(int nPath = 0; nPath < m_pathsForUpdating.GetCount(); nPath++)
 121                         {
 122                                 path.SetFromWin(g_Git.m_CurrentDir+_T("\\")+m_pathsForUpdating[nPath].GetWinPathString());
 123                                 ATLTRACE(_T("Cache Item Update for %s (%d)\n"), path.GetWinPathString(), GetTickCount());
 124                                 if (!path.IsDirectory())
 125                                 {
 126                                         // send notifications to the shell for changed files - folders are updated by the cache itself.
 127                                         SHChangeNotify(SHCNE_UPDATEITEM, SHCNF_PATH | SHCNF_FLUSHNOWAIT, path.GetWinPath(), NULL);
 128                                 }
 129                                 DWORD cbWritten;
 130                                 TGITCacheCommand cmd;
 131                                 cmd.command = TGITCACHECOMMAND_CRAWL;
 132                                 wcsncpy_s(cmd.path, MAX_PATH+1, path.GetDirectory().GetWinPath(), MAX_PATH);
 133                                 BOOL fSuccess = WriteFile(
 134                                         hPipe,                  // handle to pipe
 135                                         &cmd,                   // buffer to write from
 136                                         sizeof(cmd),    // number of bytes to write
 137                                         &cbWritten,             // number of bytes written
 138                                         NULL);                  // not overlapped I/O
 139
 140                                 if (! fSuccess || sizeof(cmd) != cbWritten)
 141                                 {
 142                                         DisconnectNamedPipe(hPipe);
 143                                         return;
 144                                 }
 145                         }
 146                         if (!hPipe)
 147                         {
 148                                 // now tell the cache we don't need it's command thread anymore
 149                                 DWORD cbWritten;
 150                                 TGITCacheCommand cmd;
 151                                 cmd.command = TGITCACHECOMMAND_END;
 152                                 WriteFile(
 153                                         hPipe,                  // handle to pipe
 154                                         &cmd,                   // buffer to write from
 155                                         sizeof(cmd),    // number of bytes to write
 156                                         &cbWritten,             // number of bytes written
 157                                         NULL);                  // not overlapped I/O
 158                                 DisconnectNamedPipe(hPipe);
 159                         }
 160                 }
 161                 else
 162                 {
 163                         ATLTRACE("SetNamedPipeHandleState failed");
 164                 }
 165         }
 166 }
 167
 168 bool CShellUpdater::RebuildIcons()
 169 {
 170         const int BUFFER_SIZE = 1024;
 171         TCHAR *buf = NULL;
 172         HKEY hRegKey = 0;
 173         DWORD dwRegValue;
 174         DWORD dwRegValueTemp;
 175         DWORD dwSize;
 176         DWORD_PTR dwResult;
 177         LONG lRegResult;
 178         std::wstring sRegValueName;
 179         int iDefaultIconSize;
 180         bool bResult = false;
 181
 182         lRegResult = RegOpenKeyEx(HKEY_CURRENT_USER, _T("Control Panel\\Desktop\\WindowMetrics"),
 183                 0, KEY_READ | KEY_WRITE, &hRegKey);
 184         if (lRegResult != ERROR_SUCCESS)
 185                 goto Cleanup;
 186
 187         buf = new TCHAR[BUFFER_SIZE];
 188         if(buf == NULL)
 189                 goto Cleanup;
 190
 191         // we're going to change the Shell Icon Size value
 192         sRegValueName = _T("Shell Icon Size");
 193
 194         // Read registry value
 195         dwSize = BUFFER_SIZE;
 196         lRegResult = RegQueryValueEx(hRegKey, sRegValueName.c_str(), NULL, NULL,
 197                 (LPBYTE) buf, &dwSize);
 198         if (lRegResult != ERROR_FILE_NOT_FOUND)
 199         {
 200                 // If registry key doesn't exist create it using system current setting
 201                 iDefaultIconSize = ::GetSystemMetrics(SM_CXICON);
 202                 if (0 == iDefaultIconSize)
 203                         iDefaultIconSize = 32;
 204                 _sntprintf_s(buf, BUFFER_SIZE, BUFFER_SIZE, _T("%d"), iDefaultIconSize);
 205         }
 206         else if (lRegResult != ERROR_SUCCESS)
 207                 goto Cleanup;
 208
 209         // Change registry value
 210         dwRegValue = _ttoi(buf);
 211         dwRegValueTemp = dwRegValue-1;
 212
 213         dwSize = _sntprintf_s(buf, BUFFER_SIZE, BUFFER_SIZE, _T("%d"), dwRegValueTemp) + sizeof(TCHAR);
 214         lRegResult = RegSetValueEx(hRegKey, sRegValueName.c_str(), 0, REG_SZ,
 215                 (LPBYTE) buf, dwSize);
 216         if (lRegResult != ERROR_SUCCESS)
 217                 goto Cleanup;
 218
 219
 220         // Update all windows
 221         SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, SPI_SETNONCLIENTMETRICS,
 222                 0, SMTO_ABORTIFHUNG, 5000, &dwResult);
 223
 224         // Reset registry value
 225         dwSize = _sntprintf_s(buf, BUFFER_SIZE, BUFFER_SIZE, _T("%d"), dwRegValue) + sizeof(TCHAR);
 226         lRegResult = RegSetValueEx(hRegKey, sRegValueName.c_str(), 0, REG_SZ,
 227                 (LPBYTE) buf, dwSize);
 228         if(lRegResult != ERROR_SUCCESS)
 229                 goto Cleanup;
 230
 231         // Update all windows
 232         SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, SPI_SETNONCLIENTMETRICS,
 233                 0, SMTO_ABORTIFHUNG, 5000, &dwResult);
 234
 235         bResult = true;
 236
 237 Cleanup:
 238         if (hRegKey != 0)
 239         {
 240                 RegCloseKey(hRegKey);
 241         }
 242         if (buf != NULL)
 243         {
 244                 delete [] buf;
 245         }
 246
 247         return bResult;
 248
 249 }