Line data    Source code

       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             : #include "sal/config.h"
      11             : 
      12             : #include "svtools/filechangedchecker.hxx"
      13             : 
      14           0 : FileChangedChecker::FileChangedChecker(const OUString& rFilename, const ::boost::function0<void>& rCallback) :
      15             :     mTimer(),
      16             :     mFileName(rFilename),
      17             :     mLastModTime(),
      18           0 :     mpCallback(rCallback)
      19             : {
      20             :     // Get the curren last file modified Status
      21           0 :     getCurrentModTime(mLastModTime);
      22             : 
      23             :     // associate the callback function for the timer
      24           0 :     mTimer.SetTimeoutHdl(LINK(this, FileChangedChecker, TimerHandler));
      25             : 
      26             :     //start the timer
      27           0 :     resetTimer();
      28           0 : }
      29             : 
      30           0 : void FileChangedChecker::resetTimer()
      31             : {
      32             :     //Start the timer if its not active
      33           0 :     if(!mTimer.IsActive())
      34           0 :         mTimer.Start();
      35             : 
      36             :     // Set a timeout of 3 seconds
      37           0 :     mTimer.SetTimeout(3000);
      38           0 : }
      39             : 
      40           0 : bool FileChangedChecker::getCurrentModTime(TimeValue& o_rValue) const
      41             : {
      42             :     // Need a Directory item to fetch file status
      43           0 :     osl::DirectoryItem aItem;
      44           0 :     osl::DirectoryItem::get(mFileName, aItem);
      45             : 
      46             :     // Retrieve the status - we are only interested in last File
      47             :     // Modified time
      48           0 :     osl::FileStatus aStatus( osl_FileStatus_Mask_ModifyTime );
      49           0 :     if( osl::FileBase::E_None != aItem.getFileStatus(aStatus) )
      50           0 :         return false;
      51             : 
      52           0 :     o_rValue = aStatus.getModifyTime();
      53           0 :     return true;
      54             : }
      55             : 
      56           0 : bool FileChangedChecker::hasFileChanged()
      57             : {
      58             :     // Get the current file Status
      59           0 :     TimeValue newTime={0,0};
      60           0 :     if( !getCurrentModTime(newTime) )
      61           0 :         return true; // well. hard to answer correctly here ...
      62             : 
      63             :     // Check if the seconds time stamp has any difference
      64             :     // If so, then our file has changed meanwhile
      65           0 :     if( newTime.Seconds != mLastModTime.Seconds ||
      66           0 :         newTime.Nanosec != mLastModTime.Nanosec )
      67             :     {
      68             :         // Since the file has changed, set the new status as the file status and
      69             :         // return True
      70           0 :         mLastModTime = newTime ;
      71             : 
      72           0 :         return true;
      73             :     }
      74             :     else
      75           0 :         return false;
      76             : }
      77             : 
      78           0 : IMPL_LINK_NOARG(FileChangedChecker, TimerHandler)
      79             : {
      80             :     // If the file has changed, then update the graphic in the doc
      81             :     OSL_TRACE("Timeout Called");
      82           0 :     if(hasFileChanged())
      83             :     {
      84             :         OSL_TRACE("File modified");
      85           0 :         mpCallback();
      86             :     }
      87             : 
      88             :     // Reset the timer in any case
      89           0 :     resetTimer();
      90           0 :     return 0;
      91             : }
      92             : 
      93             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */