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/*
For general Scribus (>=1.3.2) copyright and licensing information please refer
to the COPYING file provided with the program. Following this notice may exist
a copyright and/or license notice that predates the release of Scribus 1.3.2
for which a new license (GPL+exception) is in place.
*/
#include "scconfig.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#if defined(_WIN32) && !defined(usleep)
#include <windows.h>
#define usleep(t) Sleep((t > 1000) ? (t / 1000) : 1)
#endif
#include <QDebug>
#include <QStringList>
#include "filewatcher.h"
FileWatcher::FileWatcher( QObject* parent) : QObject(parent)
{
m_stateFlags = 0;
m_timeOut = 10000;
watchedFiles.clear();
watchTimer = new QTimer(this);
watchTimer->setSingleShot(true);
connect(watchTimer, SIGNAL(timeout()), this, SLOT(checkFiles()));
watchTimer->start(m_timeOut);
}
FileWatcher::~FileWatcher()
{
m_stateFlags |= Dying;
this->stop();
disconnect(watchTimer, SIGNAL(timeout()), this, SLOT(checkFiles()));
if (!(m_stateFlags & AddRemoveBlocked))
watchedFiles.clear();
delete watchTimer;
}
void FileWatcher::setTimeOut(const int newTimeOut, const bool restartTimer)
{
m_timeOut=newTimeOut;
if (restartTimer)
start();
}
int FileWatcher::timeOut() const
{
return m_timeOut;
}
void FileWatcher::addFile(QString fileName)
{
if (fileName.isEmpty())
{
qDebug()<<"Attempt to add empty filename to filewatcher";
return;
}
watchTimer->stop();
if (!watchedFiles.contains(fileName))
{
struct fileMod fi;
fi.info = QFileInfo(fileName);
fi.timeInfo = fi.info.lastModified();
fi.pendingCount = 0;
fi.pending = false;
fi.refCount = 1;
watchedFiles.insert(fileName, fi);
}
else
watchedFiles[fileName].refCount++;
if (!(m_stateFlags & TimerStopped))
watchTimer->start(m_timeOut);
}
void FileWatcher::removeFile(QString fileName)
{
watchTimer->stop();
if (watchedFiles.contains(fileName))
{
watchedFiles[fileName].refCount--;
if (watchedFiles[fileName].refCount == 0)
watchedFiles.remove(fileName);
}
if (!(m_stateFlags & TimerStopped))
watchTimer->start(m_timeOut);
}
void FileWatcher::addDir(QString fileName)
{
addFile(fileName);
}
void FileWatcher::removeDir(QString fileName)
{
removeFile(fileName);
}
void FileWatcher::start()
{
watchTimer->stop();
m_stateFlags &= ~TimerStopped;
watchTimer->start(m_timeOut);
}
void FileWatcher::stop()
{
watchTimer->stop();
m_stateFlags |= StopRequested;
while ((m_stateFlags & FileCheckRunning))
usleep(100);
m_stateFlags &= ~StopRequested;
m_stateFlags |= TimerStopped;
}
void FileWatcher::forceScan()
{
checkFiles();
}
bool FileWatcher::isActive()
{
return (m_stateFlags & AddRemoveBlocked);
}
QList<QString> FileWatcher::files()
{
return watchedFiles.keys();
}
void FileWatcher::checkFiles()
{
m_stateFlags |= AddRemoveBlocked;
m_stateFlags |= FileCheckRunning;
watchTimer->stop();
m_stateFlags |= TimerStopped;
QDateTime time;
QStringList toRemove;
QMap<QString, fileMod>::Iterator it;
for ( it = watchedFiles.begin(); !(m_stateFlags & FileCheckMustStop) && it != watchedFiles.end(); ++it )
{
it.value().info.refresh();
if (!it.value().info.exists())
{
if (m_stateFlags & FileCheckMustStop)
break;
if (!it.value().pending)
{
it.value().pendingCount = 5;
it.value().pending = true;
emit statePending(it.key());
continue;
}
else
{
if (it.value().pendingCount != 0)
{
it.value().pendingCount--;
continue;
}
else
{
it.value().pending = false;
if (it.value().info.isDir())
emit dirDeleted(it.key());
else
emit fileDeleted(it.key());
if (m_stateFlags & FileCheckMustStop)
break;
it.value().refCount--;
if (it.value().refCount == 0)
toRemove.append(it.key());
continue;
}
}
}
else
{
//qDebug()<<it.key();
it.value().pending = false;
time = it.value().info.lastModified();
if (time != it.value().timeInfo)
{
//qDebug()<<"Times different: last modified:"<<time<<"\t recorded time:"<<it.value().timeInfo;
if (it.value().info.isDir())
{
//qDebug()<<"dir, ignoring"<<it.key();
it.value().timeInfo = time;
if (!(m_stateFlags & FileCheckMustStop))
emit dirChanged(it.key());
}
else
{
uint sizeo = it.value().info.size();
usleep(100);
it.value().info.refresh();
uint sizen = it.value().info.size();
//qDebug()<<"Size comparison"<<sizeo<<sizen<<it.key();
while (sizen != sizeo)
{
sizeo = sizen;
usleep(100);
it.value().info.refresh();
sizen = it.value().info.size();
}
it.value().timeInfo = time;
if (m_stateFlags & FileCheckMustStop)
break;
emit fileChanged(it.key());
}
}
}
}
if (m_stateFlags & Dying)
watchedFiles.clear();
else
{
for( int i=0; i<toRemove.count(); ++i)
watchedFiles.remove(toRemove[i]);
m_stateFlags &= ~AddRemoveBlocked;
m_stateFlags &= ~TimerStopped;
watchTimer->start(m_timeOut);
}
m_stateFlags &= ~FileCheckRunning;
}
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