src/Git/GitFolderStatus.h

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2008-2012 - TortoiseGit
   4 // Copyright (C) 2003-2006,2008,2011 - 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 #pragma once
  21
  22 #include "GitStatus.h"
  23 #include "TGitPath.h"
  24 #include "SmartHandle.h"
  25
  26 typedef struct FileStatusCacheEntry
  27 {
  28         git_wc_status_kind              status;
  29         int                                             askedcounter;
  30         bool                                    assumeValid;
  31         bool                                    skipWorktree;
  32 } FileStatusCacheEntry;
  33
  34 #define GITFOLDERSTATUS_CACHETIMES                              10
  35 #define GITFOLDERSTATUS_CACHETIMEOUT                    2000
  36 #define GITFOLDERSTATUS_RECURSIVECACHETIMEOUT   4000
  37 #define GITFOLDERSTATUS_FOLDER                                  500
  38 /**
  39  * \ingroup TortoiseShell
  40  * This class represents a caching mechanism for the
  41  * git statuses. Once a status for a versioned
  42  * file is requested (GetFileStatus()) first its checked
  43  * if that status is already in the cache. If it is not
  44  * then the git statuses for ALL files in the same
  45  * directory is fetched and cached. This is because git
  46  * needs almost the same time to get one or all status (in
  47  * the same directory).
  48  * To prevent a cache flush for the explorer folder view
  49  * the cache is only fetched for versioned files and
  50  * not for folders.
  51  */
  52 class GitFolderStatus
  53 {
  54 public:
  55         GitFolderStatus(void);
  56         ~GitFolderStatus(void);
  57         const FileStatusCacheEntry *    GetFullStatus(const CTGitPath& filepath, BOOL bIsFolder);
  58         const FileStatusCacheEntry *    GetCachedItem(const CTGitPath& filepath);
  59
  60         FileStatusCacheEntry            invalidstatus;
  61
  62         GitStatus       m_GitStatus;
  63
  64 private:
  65         const FileStatusCacheEntry * BuildCache(const CTGitPath& filepath, const CString& sProjectRoot, BOOL bIsFolder, BOOL bDirectFolder = FALSE);
  66         DWORD                           GetTimeoutValue();
  67
  68         void                            ClearCache();
  69
  70         int                                     m_nCounter;
  71         typedef std::map<stdstring, FileStatusCacheEntry> FileStatusMap;
  72         FileStatusMap                   m_cache;
  73         DWORD                                   m_TimeStamp;
  74         FileStatusCacheEntry    dirstat;
  75         git_wc_status2_t *              dirstatus;
  76
  77         stdstring               sCacheKey;
  78
  79         CAutoGeneralHandle      m_hInvalidationEvent;
  80
  81         // The item we most recently supplied status for
  82         CTGitPath               m_mostRecentPath;
  83         const FileStatusCacheEntry* m_mostRecentStatus;
  84 };
  85