experimental hyprland lua support

Plugins/ZShell/Internal/hyprextras.cpp

@@ -6,11 +6,123 @@
 #include <qlocalsocket.h>
 #include <qloggingcategory.h>
 #include <qvariant.h>
+#include <qmetatype.h>
 
 Q_LOGGING_CATEGORY(lcHypr, "ZShell.internal.hypr", QtInfoMsg)
 
 namespace ZShell::internal::hypr {
 
+static QString luaEscapeString(const QString& s) {
+	QString out;
+	out.reserve(s.size() + 2);
+
+	out += '"';
+	for (QChar c : s) {
+		switch (c.unicode()) {
+		case '\\': out += "\\\\"; break;
+		case '"':  out += "\\\""; break;
+		case '\n': out += "\\n"; break;
+		case '\r': out += "\\r"; break;
+		case '\t': out += "\\t"; break;
+		default:   out += c; break;
+		}
+	}
+	out += '"';
+
+	return out;
+}
+
+static QString luaValue(const QVariant& v);
+
+static QString luaArray(const QVariantList& list) {
+	QStringList parts;
+	parts.reserve(list.size());
+
+	for (const auto& item : list) {
+		parts << luaValue(item);
+	}
+
+	return "{ " + parts.join(", ") + " }";
+}
+
+static QString luaMap(const QVariantMap& map) {
+	QStringList parts;
+	parts.reserve(map.size());
+
+	for (auto it = map.cbegin(); it != map.cend(); ++it) {
+		parts << it.key() + " = " + luaValue(it.value());
+	}
+
+	return "{ " + parts.join(", ") + " }";
+}
+
+static QString luaValue(const QVariant& v) {
+	if (!v.isValid() || v.isNull())
+		return "nil";
+
+	switch (v.metaType().id()) {
+	case QMetaType::Bool:
+		return v.toBool() ? "true" : "false";
+
+	case QMetaType::Int:
+	case QMetaType::UInt:
+	case QMetaType::LongLong:
+	case QMetaType::ULongLong:
+	case QMetaType::Double:
+		return v.toString();
+
+	case QMetaType::QString:
+		return luaEscapeString(v.toString());
+
+	case QMetaType::QStringList:
+		return luaArray(v.toStringList().toList());
+
+	case QMetaType::QVariantList:
+		return luaArray(v.toList());
+
+	case QMetaType::QVariantMap:
+		return luaMap(v.toMap());
+
+	case QMetaType::QVariantHash: {
+		QVariantMap map;
+		for (auto it = v.toHash().begin(); it != v.toHash().end(); ++it)
+			map.insert(it.key(), it.value());
+		return luaMap(map);
+	}
+
+	default:
+		return luaEscapeString(v.toString());
+	}
+}
+
+static QString normalizeKey(QString key) {
+	key = key.trimmed();
+	key.replace(':', '.');
+	return key;
+}
+
+static QString buildHlConfig(const QString& key, const QVariant& value) {
+	const QStringList parts = normalizeKey(key).split('.', Qt::SkipEmptyParts);
+	if (parts.isEmpty())
+		return {};
+
+	QString out = "hl.config({ ";
+
+	for (int i = 0; i < parts.size(); ++i) {
+		out += parts[i] + " = ";
+		if (i != parts.size() - 1)
+			out += "{ ";
+	}
+
+	out += luaValue(value);
+
+	for (int i = 0; i < parts.size() - 1; ++i)
+		out += " }";
+
+	out += " })";
+	return out;
+}
+
 HyprExtras::HyprExtras(QObject* parent)
 	: QObject(parent)
 	, m_requestSocket("")
@@ -18,18 +130,20 @@ HyprExtras::HyprExtras(QObject* parent)
 	, m_socket(nullptr)
 	, m_socketValid(false)
 	, m_devices(new HyprDevices(this)) {
+
 	const auto his = qEnvironmentVariable("HYPRLAND_INSTANCE_SIGNATURE");
 	if (his.isEmpty()) {
-		qCWarning(lcHypr) << "$HYPRLAND_INSTANCE_SIGNATURE is unset. Unable to connect to Hyprland socket.";
+		qCWarning(lcHypr) << "$HYPRLAND_INSTANCE_SIGNATURE is unset.";
 		return;
 	}
 
-	auto hyprDir = QString("%1/hypr/%2").arg(qEnvironmentVariable("XDG_RUNTIME_DIR"), his);
+	auto hyprDir = QString("%1/hypr/%2")
-	if (!QDir(hyprDir).exists()) {
+	               .arg(qEnvironmentVariable("XDG_RUNTIME_DIR"), his);
-		hyprDir = "/tmp/hypr/" + his;
 
 	if (!QDir(hyprDir).exists()) {
-			qCWarning(lcHypr) << "Hyprland socket directory does not exist. Unable to connect to Hyprland socket.";
+		hyprDir = "/tmp/hypr/" + his;
+		if (!QDir(hyprDir).exists()) {
+			qCWarning(lcHypr) << "Hyprland socket directory not found.";
 			return;
 		}
 	}
@@ -42,13 +156,19 @@ HyprExtras::HyprExtras(QObject* parent)
 
 	m_socket = new QLocalSocket(this);
 
-	QObject::connect(m_socket, &QLocalSocket::errorOccurred, this, &HyprExtras::socketError);
+	connect(m_socket, &QLocalSocket::errorOccurred,
-	QObject::connect(m_socket, &QLocalSocket::stateChanged, this, &HyprExtras::socketStateChanged);
+	        this, &HyprExtras::socketError);
-	QObject::connect(m_socket, &QLocalSocket::readyRead, this, &HyprExtras::readEvent);
+
+	connect(m_socket, &QLocalSocket::stateChanged,
+	        this, &HyprExtras::socketStateChanged);
+
+	connect(m_socket, &QLocalSocket::readyRead,
+	        this, &HyprExtras::readEvent);
 
 	m_socket->connectToServer(m_eventSocket, QLocalSocket::ReadOnly);
 }
 
+
 QVariantHash HyprExtras::options() const {
 	return m_options;
 }
@@ -58,148 +178,145 @@ HyprDevices* HyprExtras::devices() const {
 }
 
 void HyprExtras::message(const QString& message) {
-	if (message.isEmpty()) {
+	if (message.isEmpty()) return;
-		return;
-	}
 
 	makeRequest(message, [](bool success, const QByteArray& res) {
-			if (!success) {
+			if (!success)
-				qCWarning(lcHypr) << "message: request error:" << QString::fromUtf8(res);
+				qCWarning(lcHypr) << "message failed:" << res;
-			}
 		});
 }
 
 void HyprExtras::batchMessage(const QStringList& messages) {
-	if (messages.isEmpty()) {
+	if (messages.isEmpty()) return;
-		return;
-	}
 
-	makeRequest("[[BATCH]]" + messages.join(";"), [](bool success, const QByteArray& res) {
+	makeRequest("[[BATCH]]" + messages.join(";"),
-			if (!success) {
+	            [](bool success, const QByteArray& res) {
-				qCWarning(lcHypr) << "batchMessage: request error:" << QString::fromUtf8(res);
+			if (!success)
-			}
+				qCWarning(lcHypr) << "batchMessage failed:" << res;
 		});
 }
 
 void HyprExtras::applyOptions(const QVariantHash& options) {
-	if (options.isEmpty()) {
+	if (options.isEmpty())
 		return;
+
+	QStringList luaCalls;
+	luaCalls.reserve(options.size());
+
+	for (auto it = options.begin(); it != options.end(); ++it) {
+		const auto call = buildHlConfig(it.key(), it.value());
+		if (!call.isEmpty())
+			luaCalls << call;
 	}
 
-	QString request;
+	if (luaCalls.isEmpty())
-	request.reserve(12 + options.size() * 40);
+		return;
-	request += QLatin1String("[[BATCH]]");
-	for (auto it = options.constBegin(); it != options.constEnd(); ++it) {
-		request += QLatin1String("keyword ") + it.key() + QLatin1Char(' ') + it.value().toString() + QLatin1Char(';');
-	}
 
-	makeRequest(request, [this](bool success, const QByteArray& res) {
+	const QString request =
-			if (success) {
+		"eval " + luaCalls.join("; ");
+
+	makeRequest(request,
+	            [this](bool success, const QByteArray& res) {
+			if (success)
 				refreshOptions();
-			} else {
+			else
-				qCWarning(lcHypr) << "applyOptions: request error" << QString::fromUtf8(res);
+				qCWarning(lcHypr) << "applyOptions failed:" << res;
-			}
 		});
 }
 
 void HyprExtras::refreshOptions() {
-	if (!m_optionsRefresh.isNull()) {
+	if (!m_optionsRefresh.isNull())
 		m_optionsRefresh->close();
-	}
 
-	m_optionsRefresh = makeRequestJson("descriptions", [this](bool success, const QJsonDocument& response) {
+	m_optionsRefresh = makeRequestJson("descriptions",
+	                                   [this](bool success, const QJsonDocument& response) {
 			m_optionsRefresh.reset();
-			if (!success) {
+			if (!success) return;
-				return;
-			}
 
-			const auto options = response.array();
+			const auto arr = response.array();
 			bool dirty = false;
 
-			for (const auto& o : std::as_const(options)) {
+			for (const auto& o : arr) {
 				const auto obj = o.toObject();
 				const auto key = obj.value("value").toString();
-				const auto value = obj.value("data").toObject().value("current").toVariant();
+				const auto value =
+					obj.value("data").toObject()
+					.value("current")
+					.toVariant();
+
 				if (m_options.value(key) != value) {
-					dirty = true;
 					m_options.insert(key, value);
+					dirty = true;
 				}
 			}
 
-			if (dirty) {
+			if (dirty)
 				emit optionsChanged();
-			}
 		});
 }
 
 void HyprExtras::refreshDevices() {
-	if (!m_devicesRefresh.isNull()) {
+	if (!m_devicesRefresh.isNull())
 		m_devicesRefresh->close();
-	}
 
-	m_devicesRefresh = makeRequestJson("devices", [this](bool success, const QJsonDocument& response) {
+	m_devicesRefresh = makeRequestJson("devices",
+	                                   [this](bool success, const QJsonDocument& response) {
 			m_devicesRefresh.reset();
-			if (success) {
+			if (success)
 				m_devices->updateLastIpcObject(response.object());
-			}
 		});
 }
 
 void HyprExtras::socketError(QLocalSocket::LocalSocketError error) const {
-	if (!m_socketValid) {
+	qCWarning(lcHypr) << "socket error:" << error;
-		qCWarning(lcHypr) << "socketError: unable to connect to Hyprland event socket:" << error;
-	} else {
-		qCWarning(lcHypr) << "socketError: Hyprland event socket error:" << error;
-	}
 }
 
 void HyprExtras::socketStateChanged(QLocalSocket::LocalSocketState state) {
-	if (state == QLocalSocket::UnconnectedState && m_socketValid) {
+	m_socketValid = (state == QLocalSocket::ConnectedState);
-		qCWarning(lcHypr) << "socketStateChanged: Hyprland event socket disconnected.";
-	}
-
-	m_socketValid = state == QLocalSocket::ConnectedState;
 }
 
 void HyprExtras::readEvent() {
 	while (true) {
-		auto rawEvent = m_socket->readLine();
+		auto line = m_socket->readLine();
-		if (rawEvent.isEmpty()) {
+		if (line.isEmpty()) break;
-			break;
+
-		}
+		line.chop(1);
-		rawEvent.truncate(rawEvent.length() - 1); // Remove trailing \n
+		const auto event = line.left(line.indexOf(">>"));
-		const auto event = QByteArrayView(rawEvent.data(), rawEvent.indexOf(">>"));
+
 		handleEvent(QString::fromUtf8(event));
 	}
 }
 
 void HyprExtras::handleEvent(const QString& event) {
-	if (event == "configreloaded") {
+	if (event == "configreloaded")
 		refreshOptions();
-	} else if (event == "activelayout") {
+	else if (event == "activelayout")
 		refreshDevices();
-	}
 }
 
 HyprExtras::SocketPtr HyprExtras::makeRequestJson(
-	const QString& request, const std::function<void(bool, QJsonDocument)>& callback) {
+	const QString& request,
-	return makeRequest("j/" + request, [callback](bool success, const QByteArray& response) {
+	const std::function<void(bool, QJsonDocument)>& callback) {
-			callback(success, QJsonDocument::fromJson(response));
+
+	return makeRequest("j/" + request,
+	                   [callback](bool success, const QByteArray& res) {
+			callback(success, QJsonDocument::fromJson(res));
 		});
 }
 
 HyprExtras::SocketPtr HyprExtras::makeRequest(
-	const QString& request, const std::function<void(bool, QByteArray)>& callback) {
+	const QString& request,
-	if (m_requestSocket.isEmpty()) {
+	const std::function<void(bool, QByteArray)>& callback) {
+
+	if (m_requestSocket.isEmpty())
 		return SocketPtr();
-	}
 
 	auto socket = SocketPtr::create(this);
 
-	QObject::connect(socket.data(), &QLocalSocket::connected, this, [=, this]() {
+	connect(socket.data(), &QLocalSocket::connected, this, [=, this]() {
-			QObject::connect(socket.data(), &QLocalSocket::readyRead, this, [socket, callback]() {
+			connect(socket.data(), &QLocalSocket::readyRead,
-				const auto response = socket->readAll();
+			        this, [socket, callback]() {
-				callback(true, std::move(response));
+				callback(true, socket->readAll());
 				socket->close();
 			});
 
@@ -207,14 +324,14 @@ HyprExtras::SocketPtr HyprExtras::makeRequest(
 			socket->flush();
 		});
 
-	QObject::connect(socket.data(), &QLocalSocket::errorOccurred, this, [=](QLocalSocket::LocalSocketError err) {
+	connect(socket.data(), &QLocalSocket::errorOccurred,
-			qCWarning(lcHypr) << "makeRequest: error making request:" << err << "| request:" << request;
+	        this, [=](QLocalSocket::LocalSocketError err) {
+			qCWarning(lcHypr) << "request error:" << err << request;
 			callback(false, {});
 			socket->close();
 		});
 
 	socket->connectToServer(m_requestSocket);
-
 	return socket;
 }