include/svtools/filechangedchecker.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 #ifndef INCLUDED_SVTOOLS_FILECHANGEDCHECKER_HXX
  11 #define INCLUDED_SVTOOLS_FILECHANGEDCHECKER_HXX
  12
  13 #include <svtools/svtdllapi.h>
  14
  15 #include <osl/file.hxx>
  16 #include <vcl/timer.hxx>
  17 #include <vcl/idle.hxx>
  18
  19 #include <functional>
  20
  21 /** Periodically checks if a file has been modified
  22
  23     Instances of this class setup a vcl timer to occasionally wake up
  24     check whether file modification time has changed.
  25  */
  26 class SVT_DLLPUBLIC FileChangedChecker
  27 {
  28 private:
  29     Idle                    mIdle;
  30     OUString const           mFileName;
  31     TimeValue                mLastModTime;
  32     ::std::function<void ()> const mpCallback;
  33
  34     bool SVT_DLLPRIVATE getCurrentModTime(TimeValue& o_rValue) const;
  35     DECL_LINK(TimerHandler, Timer *, void);
  36
  37 public:
  38     void resetTimer();
  39     bool hasFileChanged();
  40     FileChangedChecker(const OUString& rFilename,
  41             const ::std::function<void ()>& rCallback);
  42 };
  43
  44 #endif