8137b8a3ab
The selection owner must live as long as the X11 connection is valid; otherwise Xwayland won't catch the corresponding selection ownership change event, and the initialization sequence will be incomplete.
119 lines
3.2 KiB
C++
119 lines
3.2 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 <QFutureWatcher>
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#include <QProcess>
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#include <QSocketNotifier>
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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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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 handleXwaylandStarted();
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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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bool createX11Connection();
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void destroyX11Connection();
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DragEventReply dragMoveFilter(Toplevel *target, const QPoint &pos) override;
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int m_displayFileDescriptor = -1;
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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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QTimer *m_resetCrashCountTimer = nullptr;
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QByteArray m_displayName;
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QFutureWatcher<QByteArray> *m_watcher = nullptr;
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ApplicationWaylandAbstract *m_app;
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QScopedPointer<KSelectionOwner> m_selectionOwner;
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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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