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Fixes libadwaita#294

Backported from libadwaita@4e2ef2f5

Backport parts of libadwaita@466509f6

Yikes, so because it contains a leaflet that's always leaked we had an
extra gtk_widget_destroy() here to compensate. Kill it with fire.

Fix a refcycle between the widget and the swipe tracker.

Backported from libadwaita@2821a106

This is a private object, no need to bother with with weak refs. Just avoid
a refcycle.

Backported from libadwaita@d1da4bd8

Philip Withnall authored Oct 05, 2021 and Alexander Mikhaylenko committed Nov 12, 2021

`g_settings_schema_source_lookup()` returns a new reference.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Backported from libadwaita@18a1d426

These adaptive margins interfere with measuring the
default sizes, as the margins change the size. This
causes weird things like content being inaccessible
or content animating as soon as you open a PreferencesPage.

For now, we should drop the adaptive margins. In the future
we can implement this in the layout code.

rofiquzzaki rofiquzzaki authored Oct 15, 2021 and Administrator committed Oct 15, 2021

(cherry picked from commit f2115b5a)

One case we didn't guard against was if xdg-desktop-portal exists, but
doesn't provide a settings portal interface.

See libadwaita!269

Avoid falling back to Adwaita with no way to set dark variant.

The check is not perfect and will fail if libhandy and GTK prefixes differ.
Nothing we can do about that though.

Also it will stop picking up changes until restart if theme has been
invalid even once. This is unfixable too, since we can't track changes
on GdkScreen settings directly, and as soon as we set gtk-theme-name is set
it can't be used to track changes anymore.

Still better than nothing.

Only show it if the system doesn't support color schemes.

See gnome-software#1382



Drop the `:not(:active)` selector from rules which also have a
`:not(.activatable)` selector. The latter implies that the `:active`
state should be ignored.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Danial Behzadi authored Sep 15, 2021 and Administrator committed Sep 15, 2021

(cherry picked from commit f1ffe324)