Simplify connection handling in image provider

Controller is a singleton now, no need to pass the connection object around

src/main.cpp

@@ -105,9 +105,7 @@ int main(int argc, char *argv[])
     Controller::instance().setAboutData(about);
 
     engine.addImportPath("qrc:/imports");
-    MatrixImageProvider *matrixImageProvider = new MatrixImageProvider();
-    engine.rootContext()->setContextProperty("imageProvider", matrixImageProvider);
-    engine.addImageProvider(QLatin1String("mxc"), matrixImageProvider);
+    engine.addImageProvider(QLatin1String("mxc"), new MatrixImageProvider);
 
     engine.load(QUrl(QStringLiteral("qrc:/qml/main.qml")));
     if (engine.rootObjects().isEmpty())

src/matriximageprovider.cpp

@@ -12,11 +12,12 @@
 #include <QStandardPaths>
 #include <QThread>
 
+#include "controller.h"
+
 using Quotient::BaseJob;
 
-ThumbnailResponse::ThumbnailResponse(Quotient::Connection *c, QString id, QSize size)
-    : c(c)
-    , mediaId(std::move(id))
+ThumbnailResponse::ThumbnailResponse(QString id, QSize size)
+    : mediaId(std::move(id))
     , requestedSize(size)
     , localFile(QStringLiteral("%1/image_provider/%2-%3x%4.png").arg(QStandardPaths::writableLocation(QStandardPaths::CacheLocation), mediaId, QString::number(requestedSize.width()), QString::number(requestedSize.height())))
     , errorStr("Image request hasn't started")
@@ -39,21 +40,21 @@ ThumbnailResponse::ThumbnailResponse(Quotient::Connection *c, QString id, QSize
         return;
     }
 
-    if (!c) {
+    if (!Controller::instance().connection()) {
         qWarning() << "Current connection is null";
         return;
     }
 
     // Execute a request on the main thread asynchronously
-    moveToThread(c->thread());
+    moveToThread(Controller::instance().connection()->thread());
     QMetaObject::invokeMethod(this, &ThumbnailResponse::startRequest, Qt::QueuedConnection);
 }
 
 void ThumbnailResponse::startRequest()
 {
     // Runs in the main thread, not QML thread
-    Q_ASSERT(QThread::currentThread() == c->thread());
-    job = c->getThumbnail(mediaId, requestedSize);
+    Q_ASSERT(QThread::currentThread() == Controller::instance().connection()->thread());
+    job = Controller::instance().connection()->getThumbnail(mediaId, requestedSize);
     // Connect to any possible outcome including abandonment
     // to make sure the QML thread is not left stuck forever.
     connect(job, &BaseJob::finished, this, &ThumbnailResponse::prepareResult);
@@ -116,5 +117,5 @@ void ThumbnailResponse::cancel()
 
 QQuickImageResponse *MatrixImageProvider::requestImageResponse(const QString &id, const QSize &requestedSize)
 {
-    return new ThumbnailResponse(m_connection.loadRelaxed(), id, requestedSize);
+    return new ThumbnailResponse(id, requestedSize);
 }

src/matriximageprovider.h

@@ -25,7 +25,7 @@ class ThumbnailResponse : public QQuickImageResponse
 {
     Q_OBJECT
 public:
-    ThumbnailResponse(Quotient::Connection *c, QString mediaId, QSize requestedSize);
+    ThumbnailResponse(QString mediaId, QSize requestedSize);
     ~ThumbnailResponse() override = default;
 
 private Q_SLOTS:
@@ -34,7 +34,6 @@ private Q_SLOTS:
     void doCancel();
 
 private:
-    Quotient::Connection *c;
     const QString mediaId;
     QSize requestedSize;
     const QString localFile;
@@ -49,30 +48,10 @@ private:
     void cancel() override;
 };
 
-class MatrixImageProvider : public QObject, public QQuickAsyncImageProvider
+class MatrixImageProvider : public QQuickAsyncImageProvider
 {
-    Q_OBJECT
-    Q_PROPERTY(Quotient::Connection *connection READ connection WRITE setConnection NOTIFY connectionChanged)
 public:
-    explicit MatrixImageProvider() = default;
-
     QQuickImageResponse *requestImageResponse(const QString &id, const QSize &requestedSize) override;
-
-    Quotient::Connection *connection()
-    {
-        return m_connection;
-    }
-    void setConnection(Quotient::Connection *connection)
-    {
-        m_connection.storeRelaxed(connection);
-        Q_EMIT connectionChanged();
-    }
-
-Q_SIGNALS:
-    void connectionChanged();
-
-private:
-    QAtomicPointer<Quotient::Connection> m_connection;
 };
 
 #endif // MatrixImageProvider_H