service/tray: rework tray image providers

src/core/imageprovider.cpp

@@ -0,0 +1,83 @@
+#include "imageprovider.hpp"
+
+#include <qdebug.h>
+#include <qimage.h>
+#include <qlogging.h>
+#include <qmap.h>
+#include <qobject.h>
+#include <qpixmap.h>
+#include <qqmlengine.h>
+
+static QMap<QString, QsImageHandle*> liveImages;
+
+QsImageHandle::QsImageHandle(QQmlImageProviderBase::ImageType type, QObject* parent)
+    : QObject(parent)
+    , type(type) {
+	{
+		auto dbg = QDebug(&this->id);
+		dbg.nospace() << static_cast<void*>(this);
+	}
+
+	liveImages.insert(this->id, this);
+}
+
+QsImageHandle::~QsImageHandle() { liveImages.remove(this->id); }
+
+QString QsImageHandle::url() const {
+	QString url = "image://";
+	if (this->type == QQmlImageProviderBase::Image) url += "qsimage";
+	else if (this->type == QQmlImageProviderBase::Pixmap) url += "qspixmap";
+	url += "/" + this->id;
+	return url;
+}
+
+QImage
+QsImageHandle::requestImage(const QString& /*unused*/, QSize* /*unused*/, const QSize& /*unused*/) {
+	qWarning() << "Image handle" << this << "does not provide QImages";
+	return QImage();
+}
+
+QPixmap QsImageHandle::
+    requestPixmap(const QString& /*unused*/, QSize* /*unused*/, const QSize& /*unused*/) {
+	qWarning() << "Image handle" << this << "does not provide QPixmaps";
+	return QPixmap();
+}
+
+void parseReq(const QString& req, QString& target, QString& param) {
+	auto splitIdx = req.indexOf('/');
+	if (splitIdx != -1) {
+		target = req.sliced(0, splitIdx);
+		param = req.sliced(splitIdx + 1);
+	} else {
+		target = req;
+	}
+}
+
+QImage QsImageProvider::requestImage(const QString& id, QSize* size, const QSize& requestedSize) {
+	QString target;
+	QString param;
+	parseReq(id, target, param);
+
+	auto* handle = liveImages.value(target);
+	if (handle != nullptr) {
+		return handle->requestImage(param, size, requestedSize);
+	} else {
+		qWarning() << "Requested image from unknown handle" << id;
+		return QImage();
+	}
+}
+
+QPixmap
+QsPixmapProvider::requestPixmap(const QString& id, QSize* size, const QSize& requestedSize) {
+	QString target;
+	QString param;
+	parseReq(id, target, param);
+
+	auto* handle = liveImages.value(target);
+	if (handle != nullptr) {
+		return handle->requestPixmap(param, size, requestedSize);
+	} else {
+		qWarning() << "Requested image from unknown handle" << id;
+		return QPixmap();
+	}
+}