Spectral/matrix/imageprovider.cpp

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#include "imageprovider.h"
#include "connection.h"
#include "jobs/mediathumbnailjob.h"
#include <QtCore/QWaitCondition>
#include <QtCore/QDebug>
#include <QMetaObject>
using QMatrixClient::MediaThumbnailJob;
ImageProvider::ImageProvider(QObject *parent)
: QQuickImageProvider(QQmlImageProviderBase::Image,
QQmlImageProviderBase::ForceAsynchronousImageLoading)
{
#if (QT_VERSION < QT_VERSION_CHECK(5, 10, 0))
qRegisterMetaType<MediaThumbnailJob*>();
#endif
}
QImage ImageProvider::requestImage(const QString& id,
QSize* pSize, const QSize& requestedSize)
{
if (!id.startsWith("mxc://"))
{
qWarning() << "ImageProvider: won't fetch an invalid id:" << id
<< "doesn't follow server/mediaId pattern";
return {};
}
QUrl mxcUri { id };
qDebug() << "ImageProvider::requestImage:" << mxcUri.toString();
MediaThumbnailJob* job = nullptr;
QReadLocker locker(&m_lock);
#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
QMetaObject::invokeMethod(m_connection,
[=] { return m_connection->getThumbnail(mxcUri, requestedSize); },
Qt::BlockingQueuedConnection, &job);
#else
QMetaObject::invokeMethod(m_connection, "getThumbnail",
Qt::BlockingQueuedConnection, Q_RETURN_ARG(MediaThumbnailJob*, job),
Q_ARG(QUrl, mxcUri), Q_ARG(QSize, requestedSize));
#endif
if (!job)
{
qDebug() << "ImageProvider: failed to send a request";
return {};
}
QImage result;
{
QWaitCondition condition; // The most compact way to block on a signal
job->connect(job, &MediaThumbnailJob::finished, job, [&] {
result = job->thumbnail();
condition.wakeAll();
});
condition.wait(&m_lock);
}
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if(pSize != nullptr)
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*pSize = result.size();
return result;
}
void ImageProvider::setConnection(QMatrixClient::Connection* connection)
{
QWriteLocker locker(&m_lock);
m_connection = connection;
}