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window: unmanage dialog when clearing transient_for

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On Wayland, xdg-foreign would leave a modal dialog managed even after
the imported surface is destroyed.

This is sub-optimal and this breaks the atomic relationship one would
expect between the parent and its modal dialog.

Make sure we unmanage the dialog if transient_for is unset even for
Wayland native windows.

Related: https://gitlab.gnome.org/GNOME/mutter/issues/174
Related: https://gitlab.gnome.org/GNOME/mutter/issues/221

(cherry picked from commit b443bd42ac738092817addf48e0b363d140cad26)
This commit is contained in:
Olivier Fourdan 2018-07-10 14:42:42 +00:00 committed by Ray Strode
parent 728ed4fe38
commit f3655737bc
1 changed files with 8 additions and 0 deletions
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8
src/core/window.c
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@ -7942,7 +7942,15 @@ meta_window_set_transient_for (MetaWindow *window,
}
}
}
else if (window->attached && parent == NULL)
{
guint32 timestamp;
timestamp =
meta_display_get_current_time_roundtrip (window->display);
meta_window_unmanage (window, timestamp);
return;
}
/* We know this won't create a reference cycle because we check for loops */
g_clear_object (&window->transient_for);
window->transient_for = parent ? g_object_ref (parent) : NULL;