The calendar view thread can start spinning its own mainloop
before g_thread_new() returns, and in that case we have a NULL
thread.
Check that either the GThread is what we expect it to be, OR,
the thread is NULL and there are no messages in the queue.
This should save quite some resources when manipulating events.
Signals are relatively expensive, and 2 pointer chases are
definitely better than a global lock + FFI stashing + signal
manipulation.
Apparently I never properly implemented range comparison in
remove_events_outside_range(). Do so now.
This makes the infinite scrolling month view stop flickering
events when changing weeks.
Instead of smashing the main thread's mainloop with
potentially hundreds or even thousands of idles that
add, remove, or update individual events, pass arrays
of events around.
When we receive the 'objects-modified' signal, we get components
that may represent main events. We also may receive components
that have no recurrency because they were just changed from being
recurrent to non-recurrent.
We need to handle all these cases properly.
If the event has no recurrency set, remove any potential old
recurrence instance lingering around. If we're changing an event
with recurrency, make sure the recurrency instances are in sync
with the new recurrency.
Fixes https://gitlab.gnome.org/GNOME/gnome-calendar/-/issues/881
(or so I hope.)
We'll start accessing the hash table from multiple threads, so
it must be in the shared section of the structure, and it must
be encapsulated by locking.
self->thread can be NULL if gcal_calendar_monitor_set_range() was never
called prior to finalize. This is fine, so just check for NULL here
using g_clear_pointer().
Fixes:
[43/52] Compiling C object 'src/25a6634@@gcal-private@sta/core_gcal-calendar-monitor.c.o'
../../../../Projects/gnome-calendar/src/core/gcal-calendar-monitor.c: In function ‘on_client_view_objects_added_cb’:
../../../../Projects/gnome-calendar/src/core/gcal-calendar-monitor.c:402:16: warning: variable ‘old_size’ set but not used [-Wunused-but-set-variable]
402 | gint old_size;
| ^~~~~~~~
