systray: add some cleanup code

Signed-off-by: Julien Danjou <julien@danjou.info>

awesome.c

@@ -56,6 +56,7 @@ awesome_atexit(void)
 {
     client_t *c;
     xembed_window_t *em;
+    int screen_nbr;
 
     a_dbus_cleanup();
     luaA_cs_cleanup();
@@ -64,9 +65,15 @@ awesome_atexit(void)
     for(em = globalconf.embedded; em; em = em->next)
     {
         xcb_screen_t *s = xutil_screen_get(globalconf.connection, em->phys_screen);
-        xcb_reparent_window(globalconf.connection, em->win, s->root, 0, 0);
+        xembed_window_unembed(globalconf.connection, em->win, s->root);
     }
 
+    /* do this only for real screen */
+    for(screen_nbr = 0;
+        screen_nbr < xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
+        screen_nbr++)
+        systray_cleanup(screen_nbr);
+
     /* remap all clients since some WM won't handle them otherwise */
     for(c = globalconf.clients; c; c = c->next)
         client_unban(c);

common/xembed.c

@@ -25,28 +25,6 @@
 #include "common/util.h"
 #include "common/atoms.h"
 
-/** Have the embedder end XEMBED protocol communication with a child.
- * \param connection The X connection.
- * \param child The window to unembed.
- * \param root The root window to reparent to.
- */
-static inline void
-xembed_window_unembed(xcb_connection_t *connection, xcb_window_t child, xcb_window_t root)
-{
-    xcb_unmap_window(connection, child);
-    xcb_reparent_window(connection, child, root, 0, 0);
-}
-
-/** Indicate to an embedded window that it has lost focus.
- * \param c The X connection.
- * \param client The client to send message to.
- */
-static inline void
-xembed_focus_out(xcb_connection_t *c, xcb_window_t client)
-{
-    xembed_message_send(c, client, XEMBED_FOCUS_OUT, 0, 0, 0);
-}
-
 /** Send an XEMBED message to a window.
  * \param connection Connection to the X server.
  * \param towin Destination window

common/xembed.h

@@ -145,5 +145,27 @@ xembed_embedded_notify(xcb_connection_t *c,
     xembed_message_send(c, client, XEMBED_EMBEDDED_NOTIFY, 0, embedder, version);
 }
 
+/** Have the embedder end XEMBED protocol communication with a child.
+ * \param connection The X connection.
+ * \param child The window to unembed.
+ * \param root The root window to reparent to.
+ */
+static inline void
+xembed_window_unembed(xcb_connection_t *connection, xcb_window_t child, xcb_window_t root)
+{
+    xcb_reparent_window(connection, child, root, 0, 0);
+}
+
+/** Indicate to an embedded window that it has lost focus.
+ * \param c The X connection.
+ * \param client The client to send message to.
+ */
+static inline void
+xembed_focus_out(xcb_connection_t *c, xcb_window_t client)
+{
+    xembed_message_send(c, client, XEMBED_FOCUS_OUT, 0, 0, 0);
+}
+
+
 #endif
 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80

systray.c

@@ -32,6 +32,9 @@
 
 extern awesome_t globalconf;
 
+/** Initialize systray information in X.
+ * \param phys_screen Physical screen.
+ */
 void
 systray_init(int phys_screen)
 {
@@ -82,6 +85,34 @@ systray_init(int phys_screen)
     xcb_send_event(globalconf.connection, false, xscreen->root, 0xFFFFFF, (char *) &ev);
 }
 
+/** Remove systray information in X.
+ * \param phys_screen Physical screen.
+ */
+void
+systray_cleanup(int phys_screen)
+{
+    xcb_intern_atom_cookie_t atom_systray_q;
+    xcb_intern_atom_reply_t *atom_systray_r;
+    ssize_t len;
+    char atom_name[22];
+
+    len = snprintf(atom_name, sizeof(atom_name), "_NET_SYSTEM_TRAY_S%d", phys_screen);
+    atom_systray_q = xcb_intern_atom_unchecked(globalconf.connection, false, len, atom_name);
+
+    if(!(atom_systray_r = xcb_intern_atom_reply(globalconf.connection, atom_systray_q, NULL)))
+    {
+        warn("error getting systray atom");
+        return;
+    }
+
+    xcb_set_selection_owner(globalconf.connection,
+                            XCB_NONE,
+                            atom_systray_r->atom,
+                            XCB_CURRENT_TIME);
+
+    p_delete(&atom_systray_r);
+}
+
 /** Handle a systray request.
  * \param embed_win The window to embed.
  */

systray.h

@@ -26,6 +26,7 @@
 #include "common/xembed.h"
 
 void systray_init(int);
+void systray_cleanup(int);
 int systray_request_handle(xcb_window_t, int, xembed_info_t *);
 bool systray_iskdedockapp(xcb_window_t);
 int systray_process_client_message(xcb_client_message_event_t *);