9f0f452702
This provides kwin greater control over how X11 sockets are created for Xwayland. For example, it can be used to ensure that the DISPLAY remains the same across Xwayland server restarts or launching Xwayland on demand. Even though -listen <fd> option is deprecated, we still pass it because older versions of Xwayland may not have the -listenfd option.
123 lines
3.3 KiB
C++
123 lines
3.3 KiB
C++
/*
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KWin - the KDE window manager
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This file is part of the KDE project.
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SPDX-FileCopyrightText: 2019 Roman Gilg <subdiff@gmail.com>
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SPDX-FileCopyrightText: 2020 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef KWIN_XWL_XWAYLAND
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#define KWIN_XWL_XWAYLAND
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#include "xwayland_interface.h"
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#include <QProcess>
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#include <QSocketNotifier>
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#include <QTemporaryFile>
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class KSelectionOwner;
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namespace KWin
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{
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class ApplicationWaylandAbstract;
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class XwaylandSocket;
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namespace Xwl
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{
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class Xwayland : public XwaylandInterface
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{
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Q_OBJECT
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public:
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Xwayland(ApplicationWaylandAbstract *app, QObject *parent = nullptr);
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~Xwayland() override;
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/**
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* Returns the associated Xwayland process or @c null if the Xwayland server is inactive.
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*/
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QProcess *process() const override;
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public Q_SLOTS:
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/**
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* Starts the Xwayland server.
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*
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* This method will spawn an Xwayland process and will establish a new XCB connection to it.
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* If an error has occurred during the startup, the errorOccurred() signal is going to
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* be emitted. If the Xwayland server has started successfully, the started() signal will be
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* emitted.
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*
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* @see started(), stop()
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*/
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void start();
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/**
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* Stops the Xwayland server.
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*
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* This method will destroy the existing XCB connection as well all connected X11 clients.
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*
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* A SIGTERM signal will be sent to the Xwayland process. If Xwayland doesn't shut down
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* within a reasonable amount of time (5 seconds), a SIGKILL signal will be sent and thus
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* the process will be killed for good.
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*
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* If the Xwayland process crashes, the server will be stopped automatically.
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*
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* @see start()
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*/
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void stop();
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/**
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* Restarts the Xwayland server. This method is equivalent to calling stop() and start().
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*/
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void restart();
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Q_SIGNALS:
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/**
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* This signal is emitted when the Xwayland server has been started successfully and it is
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* ready to accept and manage X11 clients.
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*/
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void started();
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/**
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* This signal is emitted when an error occurs with the Xwayland server.
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*/
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void errorOccurred();
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private Q_SLOTS:
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void dispatchEvents();
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void resetCrashCount();
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void handleXwaylandFinished(int exitCode, QProcess::ExitStatus exitStatus);
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void handleXwaylandCrashed();
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void handleXwaylandError(QProcess::ProcessError error);
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void handleXwaylandReady();
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private:
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void installSocketNotifier();
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void uninstallSocketNotifier();
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void maybeDestroyReadyNotifier();
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bool createX11Connection();
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void destroyX11Connection();
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bool createXauthorityFile();
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bool writeXauthorityEntries();
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DragEventReply dragMoveFilter(Toplevel *target, const QPoint &pos) override;
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int m_xcbConnectionFd = -1;
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QProcess *m_xwaylandProcess = nullptr;
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QSocketNotifier *m_socketNotifier = nullptr;
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QSocketNotifier *m_readyNotifier = nullptr;
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QTimer *m_resetCrashCountTimer = nullptr;
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ApplicationWaylandAbstract *m_app;
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QScopedPointer<KSelectionOwner> m_selectionOwner;
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QTemporaryFile m_authorityFile;
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QScopedPointer<XwaylandSocket> m_socket;
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int m_crashCount = 0;
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Q_DISABLE_COPY(Xwayland)
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};
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} // namespace Xwl
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} // namespace KWin
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#endif
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