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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <sal/config.h>
#include <sal/log.hxx>
#include <osl/file.hxx>
#include <svtools/filechangedchecker.hxx>
#include <utility>
#include <vcl/timer.hxx>
FileChangedChecker::FileChangedChecker(OUString aFilename,
::std::function<void ()> aCallback)
: mTimer("SVTools FileChangedChecker Timer")
, mFileName(std::move(aFilename))
, mLastModTime()
, mpCallback(std::move(aCallback))
{
// Get the current last file modified Status
getCurrentModTime(mLastModTime);
// associate the callback function for the Timer
mTimer.SetInvokeHandler(LINK(this, FileChangedChecker, TimerHandler));
// set timer interval
mTimer.SetTimeout(100);
// start the timer
resetTimer();
}
FileChangedChecker::FileChangedChecker(OUString aFilename)
: mTimer("")
, mFileName(std::move(aFilename))
, mLastModTime()
, mpCallback(nullptr)
{
// Get the current last file modified Status
getCurrentModTime(mLastModTime);
}
void FileChangedChecker::resetTimer()
{
if (mpCallback == nullptr)
return;
// Start the Idle if it's not active
if (!mTimer.IsActive())
mTimer.Start();
// Set lowest Priority
mTimer.SetPriority(TaskPriority::LOWEST);
}
bool FileChangedChecker::getCurrentModTime(TimeValue& o_rValue) const
{
// Need a Directory item to fetch file status
osl::DirectoryItem aItem;
if (osl::FileBase::E_None != osl::DirectoryItem::get(mFileName, aItem))
return false;
// 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(bool bUpdate)
{
// 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
if(bUpdate)
mLastModTime = newTime ;
return true;
}
else
return false;
}
IMPL_LINK_NOARG(FileChangedChecker, TimerHandler, Timer *, void)
{
// If the file has changed, then update the graphic in the doc
SAL_INFO("svtools", "Timeout Called");
if(hasFileChanged())
{
SAL_INFO("svtools", "File modified");
mpCallback();
}
// Reset the Timer in any case
resetTimer();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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