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timeline: Only diff when ranges intersect

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When the old and the new range of the subscribers don't
overlap entirely, we can't use the regular diff algorithm.
It fails quite spectacularly.

Do a full cleanup when ranges don't overlap.
This commit is contained in:
Georges Basile Stavracas Neto
2020-04-15 20:35:04 -03:00
parent a1a4804315
commit b5cdc0bd38
1 changed files with 62 additions and 46 deletions
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src/core/gcal-timeline.c
+20 -4
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@@ -267,16 +267,31 @@ calculate_changed_events (GcalTimeline *self,
{ {
g_autoptr (GPtrArray) events_to_remove = NULL; g_autoptr (GPtrArray) events_to_remove = NULL;
g_autoptr (GPtrArray) events_to_add = NULL; g_autoptr (GPtrArray) events_to_add = NULL;
g_autoptr (GDateTime) old_range_start = NULL; GcalRangeOverlap overlap;
g_autoptr (GDateTime) old_range_end = NULL;
g_autoptr (GDateTime) new_range_start = NULL;
g_autoptr (GDateTime) new_range_end = NULL;
gint range_diff; gint range_diff;
gint i; gint i;
events_to_add = g_ptr_array_new (); events_to_add = g_ptr_array_new ();
events_to_remove = g_ptr_array_new (); events_to_remove = g_ptr_array_new ();
overlap = gcal_range_calculate_overlap (new_range, old_range, NULL);
if (overlap == GCAL_RANGE_NO_OVERLAP)
{
GCAL_TRACE_MSG ("Ranges don't overlap, doing a full cleanup");
events_to_remove = gcal_range_tree_get_data_at_range (self->events, old_range);
events_to_add = gcal_range_tree_get_data_at_range (self->events, new_range);
}
else
{
g_autoptr (GDateTime) old_range_start = NULL;
g_autoptr (GDateTime) old_range_end = NULL;
g_autoptr (GDateTime) new_range_start = NULL;
g_autoptr (GDateTime) new_range_end = NULL;
GCAL_TRACE_MSG ("Ranges overlap, doing a diff");
old_range_start = gcal_range_get_start (old_range); old_range_start = gcal_range_get_start (old_range);
old_range_end = gcal_range_get_end (old_range); old_range_end = gcal_range_get_end (old_range);
new_range_start = gcal_range_get_start (new_range); new_range_start = gcal_range_get_start (new_range);
@@ -331,6 +346,7 @@ calculate_changed_events (GcalTimeline *self,
g_ptr_array_extend (events_to_remove, events, NULL, NULL); g_ptr_array_extend (events_to_remove, events, NULL, NULL);
} }
} }
}
for (i = 0; i < events_to_remove->len; i++) for (i = 0; i < events_to_remove->len; i++)
{ {