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39 | |
40 | #include "qxcbsystemtraytracker.h" |
41 | #include "qxcbconnection.h" |
42 | #include "qxcbscreen.h" |
43 | |
44 | #include <QtCore/QDebug> |
45 | #include <QtCore/QRect> |
46 | #include <QtGui/QScreen> |
47 | |
48 | #include <qpa/qplatformnativeinterface.h> |
49 | |
50 | QT_BEGIN_NAMESPACE |
51 | |
52 | enum { |
53 | SystemTrayRequestDock = 0, |
54 | SystemTrayBeginMessage = 1, |
55 | SystemTrayCancelMessage = 2 |
56 | }; |
57 | |
58 | // QXcbSystemTrayTracker provides API for accessing the tray window and tracks |
59 | // its lifecyle by listening for its destruction and recreation. |
60 | // See http://standards.freedesktop.org/systemtray-spec/systemtray-spec-latest.html |
61 | |
62 | QXcbSystemTrayTracker *QXcbSystemTrayTracker::create(QXcbConnection *connection) |
63 | { |
64 | // Selection, tray atoms for GNOME, NET WM Specification |
65 | const xcb_atom_t trayAtom = connection->atom(qatom: QXcbAtom::_NET_SYSTEM_TRAY_OPCODE); |
66 | if (!trayAtom) |
67 | return nullptr; |
68 | const QByteArray netSysTray = QByteArrayLiteral("_NET_SYSTEM_TRAY_S" ) + QByteArray::number(connection->primaryScreenNumber()); |
69 | const xcb_atom_t selection = connection->internAtom(name: netSysTray.constData()); |
70 | if (!selection) |
71 | return nullptr; |
72 | |
73 | return new QXcbSystemTrayTracker(connection, trayAtom, selection); |
74 | } |
75 | |
76 | QXcbSystemTrayTracker::QXcbSystemTrayTracker(QXcbConnection *connection, |
77 | xcb_atom_t trayAtom, |
78 | xcb_atom_t selection) |
79 | : QObject(connection) |
80 | , m_selection(selection) |
81 | , m_trayAtom(trayAtom) |
82 | , m_connection(connection) |
83 | { |
84 | } |
85 | |
86 | xcb_window_t QXcbSystemTrayTracker::locateTrayWindow(const QXcbConnection *connection, xcb_atom_t selection) |
87 | { |
88 | auto reply = Q_XCB_REPLY(xcb_get_selection_owner, connection->xcb_connection(), selection); |
89 | if (!reply) |
90 | return 0; |
91 | return reply->owner; |
92 | } |
93 | |
94 | // Request a window to be docked on the tray. |
95 | void QXcbSystemTrayTracker::requestSystemTrayWindowDock(xcb_window_t window) const |
96 | { |
97 | xcb_client_message_event_t trayRequest; |
98 | trayRequest.response_type = XCB_CLIENT_MESSAGE; |
99 | trayRequest.format = 32; |
100 | trayRequest.sequence = 0; |
101 | trayRequest.window = m_trayWindow; |
102 | trayRequest.type = m_trayAtom; |
103 | trayRequest.data.data32[0] = XCB_CURRENT_TIME; |
104 | trayRequest.data.data32[1] = SystemTrayRequestDock; |
105 | trayRequest.data.data32[2] = window; |
106 | xcb_send_event(c: m_connection->xcb_connection(), propagate: 0, destination: m_trayWindow, event_mask: XCB_EVENT_MASK_NO_EVENT, event: (const char *)&trayRequest); |
107 | } |
108 | |
109 | // API for QPlatformNativeInterface/QPlatformSystemTrayIcon: Return tray window. |
110 | xcb_window_t QXcbSystemTrayTracker::trayWindow() |
111 | { |
112 | if (!m_trayWindow) { |
113 | m_trayWindow = QXcbSystemTrayTracker::locateTrayWindow(connection: m_connection, selection: m_selection); |
114 | if (m_trayWindow) { // Listen for DestroyNotify on tray. |
115 | m_connection->addWindowEventListener(id: m_trayWindow, eventListener: this); |
116 | const quint32 mask = XCB_CW_EVENT_MASK; |
117 | const quint32 value = XCB_EVENT_MASK_STRUCTURE_NOTIFY; |
118 | xcb_change_window_attributes(c: m_connection->xcb_connection(), window: m_trayWindow, value_mask: mask, value_list: &value); |
119 | } |
120 | } |
121 | return m_trayWindow; |
122 | } |
123 | |
124 | inline void QXcbSystemTrayTracker::emitSystemTrayWindowChanged() |
125 | { |
126 | if (const QPlatformScreen *ps = m_connection->primaryScreen()) |
127 | emit systemTrayWindowChanged(screen: ps->screen()); |
128 | } |
129 | |
130 | // Client messages with the "MANAGER" atom on the root window indicate creation of a new tray. |
131 | void QXcbSystemTrayTracker::notifyManagerClientMessageEvent(const xcb_client_message_event_t *t) |
132 | { |
133 | if (t->data.data32[1] == m_selection) |
134 | emitSystemTrayWindowChanged(); |
135 | } |
136 | |
137 | // Listen for destruction of the tray. |
138 | void QXcbSystemTrayTracker::handleDestroyNotifyEvent(const xcb_destroy_notify_event_t *event) |
139 | { |
140 | if (event->window == m_trayWindow) { |
141 | m_connection->removeWindowEventListener(id: m_trayWindow); |
142 | m_trayWindow = XCB_WINDOW_NONE; |
143 | emitSystemTrayWindowChanged(); |
144 | } |
145 | } |
146 | |
147 | xcb_visualid_t QXcbSystemTrayTracker::visualId() |
148 | { |
149 | xcb_visualid_t visual = netSystemTrayVisual(); |
150 | if (visual == XCB_NONE) |
151 | visual = m_connection->primaryScreen()->screen()->root_visual; |
152 | return visual; |
153 | } |
154 | |
155 | xcb_visualid_t QXcbSystemTrayTracker::netSystemTrayVisual() |
156 | { |
157 | if (m_trayWindow == XCB_WINDOW_NONE) |
158 | return XCB_NONE; |
159 | |
160 | xcb_atom_t tray_atom = m_connection->atom(qatom: QXcbAtom::_NET_SYSTEM_TRAY_VISUAL); |
161 | |
162 | // Get the xcb property for the _NET_SYSTEM_TRAY_VISUAL atom |
163 | auto systray_atom_reply = Q_XCB_REPLY_UNCHECKED(xcb_get_property, m_connection->xcb_connection(), |
164 | false, m_trayWindow, |
165 | tray_atom, XCB_ATOM_VISUALID, 0, 1); |
166 | if (!systray_atom_reply) |
167 | return XCB_NONE; |
168 | |
169 | xcb_visualid_t systrayVisualId = XCB_NONE; |
170 | if (systray_atom_reply->value_len > 0 && xcb_get_property_value_length(R: systray_atom_reply.get()) > 0) { |
171 | xcb_visualid_t * vids = (uint32_t *)xcb_get_property_value(R: systray_atom_reply.get()); |
172 | systrayVisualId = vids[0]; |
173 | } |
174 | |
175 | return systrayVisualId; |
176 | } |
177 | |
178 | QT_END_NAMESPACE |
179 | |