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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* Version: MPL 1.1 / GPLv3+ / LGPLv3+
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Initial Developer of the Original Code is
* [ Surendran Mahendran <surenspost@gmail.com>]
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 3 or later (the "GPLv3+"), or
* the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
* in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
* instead of those above.
*/
#include "svtools/filechangedchecker.hxx"
#include <osl/time.h>
#include "com/sun/star/system/XSystemShellExecute.hpp"
#include "com/sun/star/system/SystemShellExecuteFlags.hpp"
#include <comphelper/processfactory.hxx>
using namespace ::com::sun::star;
FileChangedChecker::FileChangedChecker(const rtl::OUString& rFilename, const ::boost::function0<void>& rCallback) :
mTimer(),
mFileName(rFilename),
mLastModTime(),
mpCallback(rCallback)
{
// Get the curren last file modified Status
getCurrentModTime(mLastModTime);
// associate the callback function for the timer
mTimer.SetTimeoutHdl(LINK(this, FileChangedChecker, TimerHandler));
//start the timer
resetTimer();
}
void FileChangedChecker::resetTimer()
{
//Start the timer if its not active
if(!mTimer.IsActive())
mTimer.Start();
// Set a timeout of 3 seconds
mTimer.SetTimeout(3000);
}
bool FileChangedChecker::getCurrentModTime(TimeValue& o_rValue) const
{
// Need a Directory item to fetch file status
osl::DirectoryItem aItem;
osl::DirectoryItem::get(mFileName, aItem);
// Retrieve the status - we are only interested in last File
// Modified time
osl::FileStatus aStatus( osl_FileStatus_Mask_ModifyTime );
if( osl::FileBase::E_None != aItem.getFileStatus(aStatus) )
return false;
o_rValue = aStatus.getModifyTime();
return true;
}
bool FileChangedChecker::hasFileChanged()
{
// Get the current file Status
TimeValue newTime={0,0};
if( !getCurrentModTime(newTime) )
return true; // well. hard to answer correctly here ...
// Check if the seconds time stamp has any difference
// If so, then our file has changed meanwhile
if( newTime.Seconds != mLastModTime.Seconds ||
newTime.Nanosec != mLastModTime.Nanosec )
{
// Since the file has changed, set the new status as the file status and
// return True
mLastModTime = newTime ;
return true;
}
else
return false;
}
IMPL_LINK(FileChangedChecker, TimerHandler, Timer *, EMPTYARG)
{
// If the file has changed, then update the graphic in the doc
OSL_TRACE("Timeout Called");
if(hasFileChanged())
{
OSL_TRACE("File modified");
mpCallback();
}
// Reset the timer in any case
resetTimer();
return 0;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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