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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qxcbsystemtraytracker.h"
#include "qxcbconnection.h"
#include "qxcbscreen.h"
#include <QtCore/QDebug>
#include <QtCore/QRect>
#include <QtGui/QScreen>
#include <qpa/qplatformnativeinterface.h>
QT_BEGIN_NAMESPACE
enum {
SystemTrayRequestDock = 0,
SystemTrayBeginMessage = 1,
SystemTrayCancelMessage = 2
};
// QXcbSystemTrayTracker provides API for accessing the tray window and tracks
// its lifecycle by listening for its destruction and recreation.
// See http://standards.freedesktop.org/systemtray-spec/systemtray-spec-latest.html
QXcbSystemTrayTracker *QXcbSystemTrayTracker::create(QXcbConnection *connection)
{
// Selection, tray atoms for GNOME, NET WM Specification
const xcb_atom_t trayAtom = connection->atom(QXcbAtom::Atom_NET_SYSTEM_TRAY_OPCODE);
if (!trayAtom)
return nullptr;
const QByteArray netSysTray = QByteArrayLiteral("_NET_SYSTEM_TRAY_S") + QByteArray::number(connection->primaryScreenNumber());
const xcb_atom_t selection = connection->internAtom(netSysTray.constData());
if (!selection)
return nullptr;
return new QXcbSystemTrayTracker(connection, trayAtom, selection);
}
QXcbSystemTrayTracker::QXcbSystemTrayTracker(QXcbConnection *connection,
xcb_atom_t trayAtom,
xcb_atom_t selection)
: QObject(connection)
, m_selection(selection)
, m_trayAtom(trayAtom)
, m_connection(connection)
{
}
// Request a window to be docked on the tray.
void QXcbSystemTrayTracker::requestSystemTrayWindowDock(xcb_window_t window) const
{
xcb_client_message_event_t trayRequest;
trayRequest.response_type = XCB_CLIENT_MESSAGE;
trayRequest.format = 32;
trayRequest.sequence = 0;
trayRequest.window = m_trayWindow;
trayRequest.type = m_trayAtom;
trayRequest.data.data32[0] = XCB_CURRENT_TIME;
trayRequest.data.data32[1] = SystemTrayRequestDock;
trayRequest.data.data32[2] = window;
xcb_send_event(m_connection->xcb_connection(), 0, m_trayWindow, XCB_EVENT_MASK_NO_EVENT, (const char *)&trayRequest);
}
// API for QPlatformNativeInterface/QPlatformSystemTrayIcon: Return tray window.
xcb_window_t QXcbSystemTrayTracker::trayWindow()
{
if (!m_trayWindow) {
m_trayWindow = m_connection->selectionOwner(m_selection);
if (m_trayWindow) { // Listen for DestroyNotify on tray.
m_connection->addWindowEventListener(m_trayWindow, this);
const quint32 mask = XCB_CW_EVENT_MASK;
const quint32 value = XCB_EVENT_MASK_STRUCTURE_NOTIFY;
xcb_change_window_attributes(m_connection->xcb_connection(), m_trayWindow, mask, &value);
}
}
return m_trayWindow;
}
inline void QXcbSystemTrayTracker::emitSystemTrayWindowChanged()
{
if (const QPlatformScreen *ps = m_connection->primaryScreen())
emit systemTrayWindowChanged(ps->screen());
}
// Client messages with the "MANAGER" atom on the root window indicate creation of a new tray.
void QXcbSystemTrayTracker::notifyManagerClientMessageEvent(const xcb_client_message_event_t *t)
{
if (t->data.data32[1] == m_selection)
emitSystemTrayWindowChanged();
}
// Listen for destruction of the tray.
void QXcbSystemTrayTracker::handleDestroyNotifyEvent(const xcb_destroy_notify_event_t *event)
{
if (event->window == m_trayWindow) {
m_connection->removeWindowEventListener(m_trayWindow);
m_trayWindow = XCB_WINDOW_NONE;
emitSystemTrayWindowChanged();
}
}
xcb_visualid_t QXcbSystemTrayTracker::visualId()
{
xcb_visualid_t visual = netSystemTrayVisual();
if (visual == XCB_NONE)
visual = m_connection->primaryScreen()->screen()->root_visual;
return visual;
}
xcb_visualid_t QXcbSystemTrayTracker::netSystemTrayVisual()
{
if (m_trayWindow == XCB_WINDOW_NONE)
return XCB_NONE;
xcb_atom_t tray_atom = m_connection->atom(QXcbAtom::Atom_NET_SYSTEM_TRAY_VISUAL);
// Get the xcb property for the _NET_SYSTEM_TRAY_VISUAL atom
auto systray_atom_reply = Q_XCB_REPLY_UNCHECKED(xcb_get_property, m_connection->xcb_connection(),
false, m_trayWindow,
tray_atom, XCB_ATOM_VISUALID, 0, 1);
if (!systray_atom_reply)
return XCB_NONE;
xcb_visualid_t systrayVisualId = XCB_NONE;
if (systray_atom_reply->value_len > 0 && xcb_get_property_value_length(systray_atom_reply.get()) > 0) {
xcb_visualid_t * vids = (uint32_t *)xcb_get_property_value(systray_atom_reply.get());
systrayVisualId = vids[0];
}
return systrayVisualId;
}
QT_END_NAMESPACE
#include "moc_qxcbsystemtraytracker.cpp"
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