134 lines
3.7 KiB
C++
134 lines
3.7 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-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef KWIN_XWL_SELECTION
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#define KWIN_XWL_SELECTION
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#include <QObject>
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#include <QVector>
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#include <xcb/xcb.h>
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struct xcb_xfixes_selection_notify_event_t;
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class QTimer;
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namespace KWin
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{
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namespace Xwl
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{
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class TransferWltoX;
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class TransferXtoWl;
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class WlSource;
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class X11Source;
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/**
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* Base class representing generic X selections and their respective
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* Wayland counter-parts.
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*
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* The class needs to be subclassed and adjusted according to the
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* selection, but provides common fucntionality to be expected of all
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* selections.
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*
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* A selection should exist through the whole runtime of an Xwayland
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* session.
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*
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* Independently of each other the class holds the currently active
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* source instance and active transfers relative to the represented
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* selection.
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*/
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class Selection : public QObject
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{
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Q_OBJECT
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public:
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static xcb_atom_t mimeTypeToAtom(const QString &mimeType);
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static xcb_atom_t mimeTypeToAtomLiteral(const QString &mimeType);
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static QStringList atomToMimeTypes(xcb_atom_t atom);
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static QString atomName(xcb_atom_t atom);
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static void sendSelectionNotify(xcb_selection_request_event_t *event, bool success);
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// on selection owner changes by X clients (Xwl -> Wl)
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bool handleXfixesNotify(xcb_xfixes_selection_notify_event_t *event);
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bool filterEvent(xcb_generic_event_t *event);
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xcb_atom_t atom() const {
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return m_atom;
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}
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xcb_window_t window() const {
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return m_window;
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}
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void overwriteRequestorWindow(xcb_window_t window);
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Q_SIGNALS:
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void transferFinished(xcb_timestamp_t eventTime);
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protected:
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Selection(xcb_atom_t atom, QObject *parent);
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void registerXfixes();
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virtual void doHandleXfixesNotify(xcb_xfixes_selection_notify_event_t *event) = 0;
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virtual void x11OffersChanged(const QStringList &added, const QStringList &removed) = 0;
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virtual bool handleClientMessage(xcb_client_message_event_t *event) {
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Q_UNUSED(event);
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return false;
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}
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// sets the current provider of the selection
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void setWlSource(WlSource *source);
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WlSource *wlSource() const {
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return m_waylandSource;
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}
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void createX11Source(xcb_xfixes_selection_notify_event_t *event);
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X11Source *x11Source() const {
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return m_xSource;
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}
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// must be called in order to provide data from Wl to X
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void ownSelection(bool own);
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void setWindow(xcb_window_t window) {
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m_window = window;
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}
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private:
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bool handleSelectionRequest(xcb_selection_request_event_t *event);
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bool handleSelectionNotify(xcb_selection_notify_event_t *event);
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bool handlePropertyNotify(xcb_property_notify_event_t *event);
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void startTransferToWayland(xcb_atom_t target, qint32 fd);
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void startTransferToX(xcb_selection_request_event_t *event, qint32 fd);
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// Timeout transfers, which have become inactive due to client errors.
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void timeoutTransfers();
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void startTimeoutTransfersTimer();
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void endTimeoutTransfersTimer();
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xcb_atom_t m_atom = XCB_ATOM_NONE;
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xcb_window_t m_window = XCB_WINDOW_NONE;
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xcb_window_t m_requestorWindow = XCB_WINDOW_NONE;
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xcb_timestamp_t m_timestamp;
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// Active source, if any. Only one of them at max can exist
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// at the same time.
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WlSource *m_waylandSource = nullptr;
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X11Source *m_xSource = nullptr;
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// active transfers
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QVector<TransferWltoX *> m_wlToXTransfers;
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QVector<TransferXtoWl *> m_xToWlTransfers;
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QTimer *m_timeoutTransfers = nullptr;
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bool m_disownPending = false;
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Q_DISABLE_COPY(Selection)
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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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