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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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 lifecyle 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::_NET_SYSTEM_TRAY_OPCODE);
if (!trayAtom)
return 0;
const QByteArray netSysTray = QByteArrayLiteral("_NET_SYSTEM_TRAY_S") + QByteArray::number(connection->primaryScreenNumber());
const xcb_atom_t selection = connection->internAtom(netSysTray.constData());
if (!selection)
return 0;
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)
, m_trayWindow(0)
{
}
xcb_window_t QXcbSystemTrayTracker::locateTrayWindow(const QXcbConnection *connection, xcb_atom_t selection)
{
xcb_get_selection_owner_cookie_t cookie = xcb_get_selection_owner(connection->xcb_connection(), selection);
xcb_get_selection_owner_reply_t *reply = xcb_get_selection_owner_reply(connection->xcb_connection(), cookie, 0);
if (!reply)
return 0;
const xcb_window_t result = reply->owner;
free(reply);
return result;
}
// API for QPlatformNativeInterface/QPlatformSystemTrayIcon: 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 = QXcbSystemTrayTracker::locateTrayWindow(m_connection, 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;
Q_XCB_CALL2(xcb_change_window_attributes(m_connection->xcb_connection(), m_trayWindow, mask, &value), m_connection);
}
}
return m_trayWindow;
}
// API for QPlatformNativeInterface/QPlatformSystemTrayIcon: Return the geometry of a
// a window parented on the tray. Determines the global geometry via XCB since mapToGlobal
// does not work for the QWindow parented on the tray.
QRect QXcbSystemTrayTracker::systemTrayWindowGlobalGeometry(xcb_window_t window) const
{
xcb_connection_t *conn = m_connection->xcb_connection();
xcb_get_geometry_reply_t *geomReply =
xcb_get_geometry_reply(conn, xcb_get_geometry(conn, window), 0);
if (!geomReply)
return QRect();
xcb_translate_coordinates_reply_t *translateReply =
xcb_translate_coordinates_reply(conn, xcb_translate_coordinates(conn, window, m_connection->rootWindow(), 0, 0), 0);
if (!translateReply) {
free(geomReply);
return QRect();
}
const QRect result(QPoint(translateReply->dst_x, translateReply->dst_y), QSize(geomReply->width, geomReply->height));
free(translateReply);
return result;
}
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();
}
}
bool QXcbSystemTrayTracker::visualHasAlphaChannel()
{
if (m_trayWindow == XCB_WINDOW_NONE)
return false;
xcb_atom_t tray_atom = m_connection->atom(QXcbAtom::_NET_SYSTEM_TRAY_VISUAL);
// Get the xcb property for the _NET_SYSTEM_TRAY_VISUAL atom
xcb_get_property_cookie_t systray_atom_cookie;
xcb_get_property_reply_t *systray_atom_reply;
systray_atom_cookie = xcb_get_property_unchecked(m_connection->xcb_connection(), false, m_trayWindow,
tray_atom, XCB_ATOM_VISUALID, 0, 1);
systray_atom_reply = xcb_get_property_reply(m_connection->xcb_connection(), systray_atom_cookie, 0);
if (!systray_atom_reply)
return false;
xcb_visualid_t systrayVisualId = XCB_NONE;
if (systray_atom_reply->value_len > 0 && xcb_get_property_value_length(systray_atom_reply) > 0) {
xcb_visualid_t * vids = (uint32_t *)xcb_get_property_value(systray_atom_reply);
systrayVisualId = vids[0];
}
free(systray_atom_reply);
if (systrayVisualId != XCB_NONE) {
quint8 depth = m_connection->primaryScreen()->depthOfVisual(systrayVisualId);
return depth == 32;
}
return false;
}
QT_END_NAMESPACE
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