115 lines
3.1 KiB
C++
115 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include <sal/config.h>
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#include <sal/log.hxx>
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#include <osl/file.hxx>
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#include <svtools/filechangedchecker.hxx>
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#include <utility>
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#include <vcl/timer.hxx>
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FileChangedChecker::FileChangedChecker(OUString aFilename,
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::std::function<void ()> aCallback)
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: mTimer("SVTools FileChangedChecker Timer")
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, mFileName(std::move(aFilename))
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, mLastModTime()
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, mpCallback(std::move(aCallback))
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{
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// Get the current last file modified Status
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getCurrentModTime(mLastModTime);
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// associate the callback function for the Timer
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mTimer.SetInvokeHandler(LINK(this, FileChangedChecker, TimerHandler));
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// set timer interval
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mTimer.SetTimeout(100);
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// start the timer
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resetTimer();
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}
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FileChangedChecker::FileChangedChecker(OUString aFilename)
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: mTimer("")
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, mFileName(std::move(aFilename))
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, mLastModTime()
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, mpCallback(nullptr)
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{
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// Get the current last file modified Status
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getCurrentModTime(mLastModTime);
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}
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void FileChangedChecker::resetTimer()
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{
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if (mpCallback == nullptr)
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return;
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// Start the Idle if it's not active
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if (!mTimer.IsActive())
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mTimer.Start();
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// Set lowest Priority
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mTimer.SetPriority(TaskPriority::LOWEST);
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}
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bool FileChangedChecker::getCurrentModTime(TimeValue& o_rValue) const
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{
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// Need a Directory item to fetch file status
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osl::DirectoryItem aItem;
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if (osl::FileBase::E_None != osl::DirectoryItem::get(mFileName, aItem))
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return false;
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// Retrieve the status - we are only interested in last File
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// Modified time
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osl::FileStatus aStatus( osl_FileStatus_Mask_ModifyTime );
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if (osl::FileBase::E_None != aItem.getFileStatus(aStatus))
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return false;
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o_rValue = aStatus.getModifyTime();
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return true;
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}
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bool FileChangedChecker::hasFileChanged(bool bUpdate)
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{
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// Get the current file Status
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TimeValue newTime={0,0};
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if( !getCurrentModTime(newTime) )
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return true; // well. hard to answer correctly here ...
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// Check if the seconds time stamp has any difference
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// If so, then our file has changed meanwhile
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if( newTime.Seconds != mLastModTime.Seconds ||
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newTime.Nanosec != mLastModTime.Nanosec )
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{
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// Since the file has changed, set the new status as the file status and
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// return True
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if(bUpdate)
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mLastModTime = newTime ;
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return true;
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}
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else
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return false;
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}
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IMPL_LINK_NOARG(FileChangedChecker, TimerHandler, Timer *, void)
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{
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// If the file has changed, then update the graphic in the doc
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SAL_INFO("svtools", "Timeout Called");
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if(hasFileChanged())
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{
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SAL_INFO("svtools", "File modified");
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mpCallback();
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}
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// Reset the Timer in any case
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resetTimer();
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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