Our weather integration should follow GNOME Weather as closely as
possible, which means that we should respect its location permission
rather than using our own or none at all (which we can as a "system"
component and as geoclue's authorization agent).
https://bugzilla.gnome.org/show_bug.cgi?id=780252
The setting to globally disable location settings altogether isn't
handled by the geoclue service itself, but by the authorization
agent. This means that:
- it doesn't apply to system components
(which gnome-shell is now considered[0])
- it doesn't apply once the geoclue connection
has been authorized
However users can reasonably expect that we won't use location services
after they disabled them, so handle the setting explicitly.
[0] https://cgit.freedesktop.org/geoclue/commit/?id=a4cef6c0ad08https://bugzilla.gnome.org/show_bug.cgi?id=780252
We currently use automatic location for weather forecasts if the
corresponding Weather setting is set, however we should take other
factors into account as well:
- whether location services are enabled at all
- whether Weather has been authorized to use them
In preparation of these changes, track the setting's value in a
separate property and make _useAutoLocation a getter, so we can
extend it with additional conditions easily.
https://bugzilla.gnome.org/show_bug.cgi?id=780252
Setting GWeatherInfo:location to null helpfully doesn't mean
"no location", but "NYC". This obviously isn't what we want
to show users, so track the location validity separately and
consider it when updating the label shown to users.
https://bugzilla.gnome.org/show_bug.cgi?id=780252
If GeoClue is not responding for some reason, the callback of
Geoclue.Simple.new would not get called, meaning that _gclueFailed
remains false. This is preventing the fallback to the most recently
used location in gnome-weather, because it requires _gclueFailed to be
true (or auto-location to be disabled). So neither code path sets a
location and the libgweather default (New York City) is being used
instead.
https://bugzilla.gnome.org/show_bug.cgi?id=779898
Weather conditions - at least as far as online services are
concerned - don't usually change in a couple of minutes.
So when updating shortly after a previous update, assume
the current conditions are still valid and trigger an
update without showing a loading indication. This should
help a bit with not getting stuck permanently in loading
state when on a shitty network.
https://bugzilla.gnome.org/show_bug.cgi?id=754031
In preparation of integrating GNOME Weather, add a helper class that
retrieves weather information according to Weather's configuration
if the application is installed.
https://bugzilla.gnome.org/show_bug.cgi?id=754031
