io/socket: add flush()

src/io/socket.cpp

@@ -5,6 +5,7 @@
 #include <qlocalserver.h>
 #include <qlocalsocket.h>
 #include <qlogging.h>
+#include <qloggingcategory.h>
 #include <qobject.h>
 #include <qqmlcomponent.h>
 #include <qqmlengine.h>
@@ -12,6 +13,8 @@
 
 #include "datastream.hpp"
 
+Q_LOGGING_CATEGORY(logSocket, "quickshell.io.socket", QtWarningMsg);
+
 void Socket::setSocket(QLocalSocket* socket) {
 	if (this->socket != nullptr) this->socket->deleteLater();
 	this->socket = socket;
@@ -22,7 +25,7 @@ void Socket::setSocket(QLocalSocket* socket) {
 		// clang-format off
 		QObject::connect(this->socket, &QLocalSocket::connected, this, &Socket::onSocketConnected);
 		QObject::connect(this->socket, &QLocalSocket::disconnected, this, &Socket::onSocketDisconnected);
-		QObject::connect(this->socket, &QLocalSocket::errorOccurred, this, &Socket::error);
+		QObject::connect(this->socket, &QLocalSocket::errorOccurred, this, &Socket::onSocketError);
 		QObject::connect(this->socket, &QLocalSocket::readyRead, this, &DataStream::onBytesAvailable);
 		// clang-format on
 
@@ -45,10 +48,12 @@ void Socket::onSocketConnected() {
 	this->connected = true;
 	this->targetConnected = false;
 	this->disconnecting = false;
+	qCDebug(logSocket) << "Socket connected:" << this;
 	emit this->connectionStateChanged();
 }
 
 void Socket::onSocketDisconnected() {
+	qCDebug(logSocket) << "Socket disconnected:" << this;
 	this->connected = false;
 	this->disconnecting = false;
 	this->socket->deleteLater();
@@ -59,6 +64,11 @@ void Socket::onSocketDisconnected() {
 	if (this->targetConnected) this->connectPathSocket();
 }
 
+void Socket::onSocketError(QLocalSocket::LocalSocketError error) {
+	qCWarning(logSocket) << "Socket error for" << this << error;
+	emit this->error(error);
+}
+
 bool Socket::isConnected() const { return this->connected; }
 
 void Socket::setConnected(bool connected) {
@@ -89,6 +99,12 @@ void Socket::write(const QString& data) {
 	}
 }
 
+void Socket::flush() {
+	if (this->socket != nullptr) {
+		this->socket->flush();
+	}
+}
+
 SocketServer::~SocketServer() { this->disableServer(); }
 
 void SocketServer::onPostReload() {

src/io/socket.hpp

@@ -2,6 +2,7 @@
 
 #include <qlocalserver.h>
 #include <qlocalsocket.h>
+#include <qloggingcategory.h>
 #include <qobject.h>
 #include <qqmlcomponent.h>
 #include <qqmlintegration.h>
@@ -11,6 +12,8 @@
 #include "../core/reload.hpp"
 #include "datastream.hpp"
 
+Q_DECLARE_LOGGING_CATEGORY(logSocket);
+
 ///! Unix socket listener.
 class Socket: public DataStream {
 	Q_OBJECT;
@@ -30,8 +33,13 @@ public:
 	explicit Socket(QObject* parent = nullptr): DataStream(parent) {}
 
 	/// Write data to the socket. Does nothing if not connected.
+	///
+	/// Remember to call flush after your last write.
 	Q_INVOKABLE void write(const QString& data);
 
+	/// Flush any queued writes to the socket.
+	Q_INVOKABLE void flush();
+
 	// takes ownership
 	void setSocket(QLocalSocket* socket);
 
@@ -54,6 +62,7 @@ protected:
 private slots:
 	void onSocketConnected();
 	void onSocketDisconnected();
+	void onSocketError(QLocalSocket::LocalSocketError error);
 
 private:
 	void connectPathSocket();