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window-props: Read WM_TRANSIENT_FOR for override-redirect windows

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As per the Extended Window Manager Hints standard version 1.3 [1] an
override-redirect window can set a transient-for window per compositing and
app-matching purposes.

So just read the WM_TRASIENT_FOR property also for such windows, adapting
the error in case they are transient for another O-R window and adding a
test to check such case.

[1] https://standards.freedesktop.org/wm-spec/wm-spec-latest.html#idm140200472512128

https://gitlab.gnome.org/GNOME/mutter/merge_requests/920
This commit is contained in:
Marco Trevisan (Treviño) 2019-10-29 19:08:01 +01:00 committed by Carlos Garnacho
parent 4a76f66a54
commit 6944839ab6
2 changed files with 43 additions and 7 deletions
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13
src/tests/stacking/set-override-redirect-parent.metatest
View File

@ -22,3 +22,16 @@ show 2/2
create 2/3
set_parent 2/3 2
show 2/3
new_client 3 x11
create 3/1 override
show 3/1
create 3/2 override
set_parent 3/2 1
show 3/2
create 3/3 override
set_parent 3/3 2
show 3/3

37
src/x11/window-props.c
View File

@ -1663,12 +1663,35 @@ reload_transient_for (MetaWindow *window,
}
else if (parent->override_redirect)
{
meta_warning ("WM_TRANSIENT_FOR window %s for top-level %s is an "
"override-redirect window and this is not correct "
"according to the standard, so we'll fallback to "
"the root window.\n", parent->desc, window->desc);
transient_for = parent->display->x11_display->xroot;
parent = NULL;
const gchar *window_kind = window->override_redirect ?
"override-redirect" : "top-level";
if (parent->xtransient_for != None)
{
/* We don't have to go through the parents, as per this code it is
* not possible that a window has the WM_TRANSIENT_FOR set to an
* override-redirect window anyways */
meta_warning ("WM_TRANSIENT_FOR window %s for %s window %s is an "
"override-redirect window and this is not correct "
"according to the standard, so we'll fallback to "
"the first non-override-redirect window 0x%lx.\n",
parent->desc, window->desc, window_kind,
parent->xtransient_for);
transient_for = parent->xtransient_for;
parent =
meta_x11_display_lookup_x_window (parent->display->x11_display,
transient_for);
}
else
{
meta_warning ("WM_TRANSIENT_FOR window %s for %s window %s is an "
"override-redirect window and this is not correct "
"according to the standard, so we'll fallback to "
"the root window.\n", parent->desc, window_kind,
window->desc);
transient_for = parent->display->x11_display->xroot;
parent = NULL;
}
}
/* Make sure there is not a loop */
@ -1840,7 +1863,7 @@ meta_x11_display_init_window_prop_hooks (MetaX11Display *x11_display)
{ x11_display->atom__NET_WM_USER_TIME, META_PROP_VALUE_CARDINAL, reload_net_wm_user_time, LOAD_INIT },
{ x11_display->atom__NET_WM_STATE, META_PROP_VALUE_ATOM_LIST, reload_net_wm_state, LOAD_INIT | INIT_ONLY },
{ x11_display->atom__MOTIF_WM_HINTS, META_PROP_VALUE_MOTIF_HINTS, reload_mwm_hints, LOAD_INIT },
{ XA_WM_TRANSIENT_FOR, META_PROP_VALUE_WINDOW, reload_transient_for, LOAD_INIT },
{ XA_WM_TRANSIENT_FOR, META_PROP_VALUE_WINDOW, reload_transient_for, LOAD_INIT | INCLUDE_OR },
{ x11_display->atom__GTK_THEME_VARIANT, META_PROP_VALUE_UTF8, reload_gtk_theme_variant, LOAD_INIT },
{ x11_display->atom__GTK_APPLICATION_ID, META_PROP_VALUE_UTF8, reload_gtk_application_id, LOAD_INIT },
{ x11_display->atom__GTK_UNIQUE_BUS_NAME, META_PROP_VALUE_UTF8, reload_gtk_unique_bus_name, LOAD_INIT },