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#include "PrintRunner.h"
#include "PrinterItem.h"
#include <QHostAddress>
#include <QElapsedTimer>
#include <QtGlobal>
#include <algorithm>
PrinterSocket::PrinterSocket() :
QTcpSocket()
{
mBuffPos = mBuff;
}
QByteArray PrinterSocket::returnLine(const char *end)
{
end++;
QByteArray line(mBuff, end-mBuff);
memmove(mBuff, end, mBuffPos-end);
mBuffPos -= (end - mBuff);
return line;
}
char *PrinterSocket::nextPos()
{
char * maybeEndF = std::find(mBuff, mBuffPos, '\f');
char * maybeEndN = std::find(mBuff, mBuffPos, '\n');
char * maybeEndR = std::find(mBuff, mBuffPos, '\r');
char * ret = std::min(std::min(maybeEndF, maybeEndN), maybeEndR);
if (ret < mBuffPos) return ret;
return NULL;
}
QByteArray PrinterSocket::readLine()
{
char *pos = nextPos();
if (pos != NULL)
{
return returnLine(pos);
}
while (true)
{
waitForReadyRead(500);
if (bytesAvailable() > 0)
{
qint64 len = read(mBuffPos, 255);
if (len < 0) return "";
mBuffPos += len;
pos = nextPos();
if (pos != NULL) return returnLine(pos);
}
}
}
qint64 PrinterSocket::bytesAvailable() const
{
return QTcpSocket::bytesAvailable() + (mBuffPos - mBuff);
}
PrintRunner::PrintRunner(SynchronizedQueue& queue, PrinterItemConstPtr& printerItem, int maxQueueSize) :
Runner(queue), mQueue(queue), mPrinterItem(printerItem), mMaxQueueSize(maxQueueSize)
{
}
void PrintRunner::readFromSocket()
{
while((mSocket->state() == QAbstractSocket::ConnectedState && mRunning) || mSocket->bytesAvailable() > 0)
{
mSocket->waitForReadyRead(500);
if (mSocket->bytesAvailable() > 0)
{
bool ff = false;
QByteArray line = mSocket->readLine();
int len = line.length();
if ((line[len-1] == '\f') && (len > 1)) // in practice this is not likely to happen as all \f are preceded by \r or \n
{
line.data()[len-1] = '\n';
ff = true;
}
if ( (len>0) && ((line[len-1] == '\n') || (line[len-1] == '\r')) )
line.data()[len-1] = '\0';
if (line.length() != 0)
{
hOutDebug(5,":" << line.data());
if (ff) mQueue.push_back("\f"); // generate eject
#ifdef Q_OS_DARWIN
else mQueue.push_back((line));
#else
else mQueue.push_back(std::move(line));
#endif
emit newData();
while (mQueue.size() > mMaxQueueSize) // do not flood the queue
QThread::msleep(100);
}
}
}
}
void PrintRunner::waitForConnected()
{
while(mSocket->state() != QAbstractSocket::ConnectedState && mRunning)
{
hOutDebug(1,"not connected:" << mSocket->state());
if (mSocket->state() == QAbstractSocket::UnconnectedState)
{
mSocket->connectToHost(QHostAddress(mPrinterItem->mIp), mPrinterItem->mPort);
mSocket->waitForConnected(1000);
if(mRunning && mSocket->state() != QAbstractSocket::ConnectedState)
QThread::msleep(200);
hOutDebug(1, "error:" << mSocket->errorString().toStdString());
}
else
{
QThread::sleep(1);
}
}
}
void PrintRunner::run()
{
mSocket = QSharedPointer<PrinterSocket>(new PrinterSocket());
mRunning = true;
qRegisterMetaType<QAbstractSocket::SocketState>("QAbstractSocket::SocketState");
mSocket->moveToThread(this);
connect(mSocket.data(), SIGNAL(stateChanged(QAbstractSocket::SocketState)),this, SLOT(socketStateChanged(QAbstractSocket::SocketState)));
while(mRunning)
{
QElapsedTimer timer;
timer.start();
emit waiting();
waitForConnected();
if (!mRunning) break;
emit connected();
hOutDebug(1,"appl connected");
readFromSocket();
hOutDebug(1, "state:" << mSocket->state() << " running: " << (mRunning? "y" : "n") );
emit disconnected();
if (timer.elapsed() < 1000)
{
QThread::msleep(1000);
}
}
emit stoppedWaiting();
mSocket->close();
}
void PrintRunner::socketStateChanged(QAbstractSocket::SocketState state)
{
static QAbstractSocket::SocketState prevState = QAbstractSocket::UnconnectedState;
if (state != prevState)
{
if (state == QAbstractSocket::ConnectedState && prevState != QAbstractSocket::ConnectedState)
{
hOutDebug(1,"Connected");
emit connected();
}
if (state != QAbstractSocket::ConnectedState && prevState == QAbstractSocket::ConnectedState)
{
hOutDebug(1,"Disconnected");
emit disconnected();
}
prevState = state;
}
hOutDebug(1, "Socket state: " << state);
}
void PrintRunner::stop()
{
mRunning = false;
}
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