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core: Prepare MetaStackTracker for X11 display being closed

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If the display is closed prematurely, go through all windows that
look X11-y and remove them for future calculations. This is not
strictly needed as Xwayland should shut down orderly (thus no client
windows be there), but doesn't hurt to prepare in advance for the
cases where it might not be the case.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/709
This commit is contained in:
Carlos Garnacho 2019-05-24 20:04:09 +02:00 committed by Carlos Garnacho
parent 9109fa0eb8
commit ca51cd8488
1 changed files with 43 additions and 0 deletions
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43
src/core/stack-tracker.c
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@ -508,6 +508,42 @@ query_xserver_stack (MetaDisplay *display,
XFree (children);
}
static void
drop_x11_windows (MetaDisplay *display,
MetaStackTracker *tracker)
{
GArray *new_stack;
GList *l;
int i;
tracker->xserver_serial = 0;
new_stack = g_array_new (FALSE, FALSE, sizeof (guint64));
for (i = 0; i < tracker->verified_stack->len; i++)
{
guint64 window = g_array_index (tracker->verified_stack, guint64, i);
if (!META_STACK_ID_IS_X11 (window))
g_array_append_val (new_stack, window);
}
g_array_unref (tracker->verified_stack);
tracker->verified_stack = new_stack;
l = tracker->unverified_predictions->head;
while (l)
{
MetaStackOp *op = l->data;
GList *next = l->next;
if (META_STACK_ID_IS_X11 (op->any.window))
g_queue_remove (tracker->unverified_predictions, op);
l = next;
}
}
MetaStackTracker *
meta_stack_tracker_new (MetaDisplay *display)
{
@ -523,6 +559,10 @@ meta_stack_tracker_new (MetaDisplay *display)
"x11-display-opened",
G_CALLBACK (query_xserver_stack),
tracker);
g_signal_connect (display,
"x11-display-closing",
G_CALLBACK (drop_x11_windows),
tracker);
meta_stack_tracker_dump (tracker);
@ -546,6 +586,9 @@ meta_stack_tracker_free (MetaStackTracker *tracker)
g_signal_handlers_disconnect_by_func (tracker->display,
(gpointer)query_xserver_stack,
tracker);
g_signal_handlers_disconnect_by_func (tracker->display,
drop_x11_windows,
tracker);
g_free (tracker);
}