[evolution-data-server] e_cal_client_get_component_as_string: Clamp the VTIMEZONE component

[Milan Crha <mcrha src gnome org>]

commit eb1ec11943641cc05e59304395080777dba89665
Author: Milan Crha <mcrha redhat com>
Date:   Thu Feb 18 14:23:55 2021 +0100

    e_cal_client_get_component_as_string: Clamp the VTIMEZONE component
    
    Let the VTIMEZONE component of the result string be with only the relevant
    parts for the used ICalComponent, to save bandwidth and disk space.

 src/calendar/libecal/e-cal-client.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/src/calendar/libecal/e-cal-client.c b/src/calendar/libecal/e-cal-client.c
index 278e62a16..3a955881a 100644
--- a/src/calendar/libecal/e-cal-client.c
+++ b/src/calendar/libecal/e-cal-client.c
@@ -3090,6 +3090,7 @@ e_cal_client_generate_instances_for_object_sync (ECalClient *client,
 typedef struct _ForeachTZIDCallbackData ForeachTZIDCallbackData;
 struct _ForeachTZIDCallbackData {
        ECalClient *client;
+       ICalComponent *icalcomp;
        GHashTable *timezone_hash;
        gboolean success;
 };
@@ -3103,7 +3104,7 @@ foreach_tzid_callback (ICalParameter *param,
        ForeachTZIDCallbackData *data = cbdata;
        const gchar *tzid;
        ICalTimezone *zone = NULL;
-       ICalComponent *vtimezone_comp;
+       ICalComponent *vtimezone_comp, *vtimezone_clone;
        gchar *vtimezone_as_string;
 
        /* Get the TZID string from the parameter. */
@@ -3125,9 +3126,14 @@ foreach_tzid_callback (ICalParameter *param,
        if (!vtimezone_comp)
                return;
 
-       vtimezone_as_string = i_cal_component_as_ical_string (vtimezone_comp);
+       vtimezone_clone = i_cal_component_clone (vtimezone_comp);
+       e_cal_util_clamp_vtimezone_by_component (vtimezone_clone, data->icalcomp);
+
+       vtimezone_as_string = i_cal_component_as_ical_string (vtimezone_clone);
 
        g_hash_table_insert (data->timezone_hash, (gchar *) tzid, vtimezone_as_string);
+
+       g_clear_object (&vtimezone_clone);
 }
 
 /* This appends the value string to the GString given in data. */
@@ -3171,6 +3177,7 @@ e_cal_client_get_component_as_string (ECalClient *client,
        /* Add any timezones needed to the hash. We use a hash since we only
         * want to add each timezone once at most. */
        cbdata.client = client;
+       cbdata.icalcomp = icalcomp;
        cbdata.timezone_hash = timezone_hash;
        cbdata.success = TRUE;
        i_cal_component_foreach_tzid (icalcomp, foreach_tzid_callback, &cbdata);