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awesome
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Check if WM_Sn is already owned before acquiring it 

Signed-off-by: Uli Schlachter <psychon@znc.in>
This commit is contained in:
Uli Schlachter 2015-10-10 22:12:25 +02:00
parent 86313e0afd
commit 19111121ce
1 changed files with 23 additions and 3 deletions
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26
awesome.c
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@ -223,11 +223,12 @@ scan(xcb_query_tree_cookie_t tree_c)
}
static void
acquire_WM_Sn(void)
acquire_WM_Sn(bool replace)
{
xcb_intern_atom_cookie_t atom_q;
xcb_intern_atom_reply_t *atom_r;
char *atom_name;
xcb_get_selection_owner_reply_t *get_sel_reply;
xcb_client_message_event_t ev;
/* Get the WM_Sn atom */
@ -254,9 +255,28 @@ acquire_WM_Sn(void)
globalconf.selection_atom = atom_r->atom;
p_delete(&atom_r);
/* Is the selection already owned? */
get_sel_reply = xcb_get_selection_owner_reply(globalconf.connection,
xcb_get_selection_owner(globalconf.connection, globalconf.selection_atom),
NULL);
if (!replace && get_sel_reply->owner != XCB_NONE)
fatal("another window manager is already running (selection owned)");
/* Acquire the selection */
xcb_set_selection_owner(globalconf.connection, globalconf.selection_owner_window,
globalconf.selection_atom, XCB_CURRENT_TIME);
if (get_sel_reply->owner != XCB_NONE)
{
/* Wait for the old owner to go away */
xcb_get_geometry_reply_t *geom_reply = NULL;
do {
p_delete(&geom_reply);
geom_reply = xcb_get_geometry_reply(globalconf.connection,
xcb_get_geometry(globalconf.connection, get_sel_reply->owner),
NULL);
} while (geom_reply != NULL);
}
p_delete(&get_sel_reply);
/* Announce that we are the new owner */
p_clear(&ev, 1);
@ -558,7 +578,7 @@ main(int argc, char **argv)
draw_test_cairo_xcb();
/* Acquire the WM_Sn selection */
acquire_WM_Sn();
acquire_WM_Sn(true);
/* initialize dbus */
a_dbus_init();
@ -581,7 +601,7 @@ main(int argc, char **argv)
globalconf.screen->root,
XCB_CW_EVENT_MASK, &select_input_val);
if (xcb_request_check(globalconf.connection, cookie))
fatal("another window manager is already running");
fatal("another window manager is already running (can't select SubstructureRedirect)");
}
/* Prefetch the maximum request length */