service/mpris: add trackChanged signal

src/services/mpris/player.cpp

@@ -258,7 +258,13 @@ void MprisPlayer::onMetadataChanged() {
 
 	auto trackidVariant = this->pMetadata.get().value("mpris:trackid");
 	if (trackidVariant.isValid() && trackidVariant.canConvert<QString>()) {
-		this->mTrackId = trackidVariant.value<QString>();
+		auto trackId = trackidVariant.value<QString>();
+
+		if (trackId != this->mTrackId) {
+			this->mTrackId = trackId;
+			emit this->trackChanged();
+		}
+
 		this->onSeek(0);
 	}
 

src/services/mpris/player.hpp

@@ -242,6 +242,8 @@ public:
 	[[nodiscard]] QList<QString> supportedMimeTypes() const;
 
 signals:
+	void trackChanged();
+
 	QSDOC_HIDE void ready();
 	void canControlChanged();
 	void canPlayChanged();