source: trunk/src/xmlpatterns/api/qiodevicedelegate.cpp@ 256

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** This file is part of the QtXmlPatterns module of the Qt Toolkit.
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#include <QtDebug>

#include "qpatternistlocale_p.h"

#include "qiodevicedelegate_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

QIODeviceDelegate::QIODeviceDelegate(QIODevice *const source) : m_source(source)
{
    Q_ASSERT(m_source);

    connect(source, SIGNAL(aboutToClose()),         SIGNAL(aboutToClose()));
    connect(source, SIGNAL(bytesWritten(qint64)),   SIGNAL(bytesWritten(qint64)));
    connect(source, SIGNAL(readChannelFinished()),  SIGNAL(readChannelFinished()));
    connect(source, SIGNAL(readyRead()),            SIGNAL(readyRead()));

    /* According to Thiago these two signals are very similar, but QtNetworkAccess uses finished()
     * instead for a minor but significant reason. */
    connect(source, SIGNAL(readChannelFinished()), SIGNAL(finished()));

    /* For instance QFile emits no signals, so how do we know if the device has all data available
     * and it therefore is safe and correct to emit finished()? isSequential() tells us whether it's
     * not random access, and whether it's safe to emit finished(). */
    if(m_source->isSequential())
        QMetaObject::invokeMethod(this, "readyRead", Qt::QueuedConnection);
    else
        QMetaObject::invokeMethod(this, "finished", Qt::QueuedConnection);

    setOpenMode(QIODevice::ReadOnly);

    /* Set up the timeout timer. */
    connect(&m_timeout, SIGNAL(timeout()), SLOT(networkTimeout()));

    m_timeout.setSingleShot(true);
    m_timeout.start(Timeout);
}

void QIODeviceDelegate::networkTimeout()
{
    setErrorString(QtXmlPatterns::tr("Network timeout."));
    error(QNetworkReply::TimeoutError);
}

void QIODeviceDelegate::abort()
{
    /* Do nothing, just to please QNetworkReply's pure virtual. */
}

bool QIODeviceDelegate::atEnd() const
{
    return m_source->atEnd();
}

qint64 QIODeviceDelegate::bytesAvailable() const
{
    return m_source->bytesAvailable();
}

qint64 QIODeviceDelegate::bytesToWrite() const
{
    return m_source->bytesToWrite();
}