For whatever reason, libical doesn't support the Etc/UTC timezone.
Currently we crash gnome-calendar whenever libical doesn't support the
current timezone (as returned by GTimeZone). Let's fall back to UTC
instead.
Fixes#485
The return value is nullable, but gnome-calendar fails to check it.
Because the nullable return value is inconvenient for us, we can instead
add and use gcal_context_get_icaltimezone() to supplement the existing
gcal_context_get_timezone().
We'll also need a function to convert from GTimeZone to ICalTimezone,
gcal_timezone_to_icaltimezone().
Fixes#419
The method ask_recurrence_modification_type() currently
receives an ESource, and tried to fetch the ECalClient
from the ESource by using g_object_get_data().
However, since we moved to GcalCalendar, we do not set
this data field in ESource.
Receive a GcalCalendar instead, and use the appropriate
function gcal_calendar_get_client() instead.
GNOME Calendar needs to deal with two different
weekday ranges:
1. Sunday → 0 ... Saturday → 6
2. Monday → 1 ... Sunday → 7 (used by GDateTime)
When converting (2) into (1), the correct calculation
is `weekday % 7`.
However, gcal_date_time_get_start_of_week() was doing
`weekday - 1` instead.
Fix it and do the correct calculation instead.
https://gitlab.gnome.org/GNOME/gnome-calendar/issues/451
The new source discoverer is a complete overhaul of
the current code. It is async-only, correctly threaded,
and easier to maintain.
A major new feature of this web source discoverer is
that it now pings the server to see if the URL feeds
us back with an iCalendar file.
Furthermore, it continues to use E-D-S WebDAV discovery
functions as a fallback mechanism.
Fixes#380
Trying to use environment variables to guess the locale was a good
attempt, but this is tricky because they have to be looked up in a
certain order: first LC_ALL, then fallback to LC_TIME, and finally LANG,
which was missed here. This caused a huge warning spam on the year view
when only LANG is set, and usually only LANG should be set since the
other environment variables are usually used for temporary overrides.
Instead, query the locale using setlocale().
Also, don't assert if the locale is shorter than expected (missing
territory code) since there is at least one valid locale that does not
have any territory codes (Esperanto) and since it's programmer error to
assert when the application processes unexpected input like this.
Fixes#424
