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 #pragma once
  11
  12 #include <config_options.h>
  13 #include <svtools/svtdllapi.h>
  14
  15 #include <osl/time.h>
  16 #include <rtl/ustring.hxx>
  17 #include <vcl/idle.hxx>
  18
  19 #include <functional>
  20
  21 class Timer;
  22
  23 /** Periodically checks if a file has been modified
  24
  25     Instances of this class setup a vcl timer to occasionally wake up
  26     check whether file modification time has changed.
  27  */
  28 class UNLESS_MERGELIBS(SVT_DLLPUBLIC) FileChangedChecker
  29 {
  30 private:
  31     Timer                    mTimer;
  32     OUString                 mFileName;
  33     TimeValue                mLastModTime;
  34     ::std::function<void ()> mpCallback;
  35
  36     bool SVT_DLLPRIVATE getCurrentModTime(TimeValue& o_rValue) const;
  37     DECL_LINK(TimerHandler, Timer *, void);
  38
  39 public:
  40     void resetTimer();
  41     bool hasFileChanged();
  42     FileChangedChecker(const OUString& rFilename,
  43             const ::std::function<void ()>& rCallback);
  44 };