[evolution] I#701 - ECompEditorEvent: Preset user timezone for all-day events, instead of UTC

[Milan Crha <mcrha src gnome org>]

commit b0c9e4ad0ed74ea41e6668ab46890eb0a276e4f0
Author: Milan Crha <mcrha redhat com>
Date:   Wed Nov 13 13:46:21 2019 +0100

    I#701 - ECompEditorEvent: Preset user timezone for all-day events, instead of UTC
    
    Closes https://gitlab.gnome.org/GNOME/evolution/issues/701

 src/calendar/gui/e-comp-editor-event.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)
---
diff --git a/src/calendar/gui/e-comp-editor-event.c b/src/calendar/gui/e-comp-editor-event.c
index b7943bb3a5..34ef34bbfd 100644
--- a/src/calendar/gui/e-comp-editor-event.c
+++ b/src/calendar/gui/e-comp-editor-event.c
@@ -281,7 +281,7 @@ ece_event_update_timezone (ECompEditorEvent *event_editor,
        ICalComponent *component;
        ICalProperty *prop;
        ICalTimezone *zone = NULL;
-       gboolean has_property = FALSE;
+       gboolean has_property = FALSE, is_date_value = FALSE;
 
        g_return_if_fail (E_IS_COMP_EDITOR_EVENT (event_editor));
 
@@ -303,7 +303,10 @@ ece_event_update_timezone (ECompEditorEvent *event_editor,
 
                dtstart = i_cal_component_get_dtstart (component);
                if (dtstart && i_cal_time_is_valid_time (dtstart)) {
-                       if (i_cal_time_is_utc (dtstart)) {
+                       if (i_cal_time_is_date (dtstart)) {
+                               zone = NULL;
+                               is_date_value = TRUE;
+                       } else if (i_cal_time_is_utc (dtstart)) {
                                zone = i_cal_timezone_get_utc_timezone ();
                        } else {
                                prop = i_cal_component_get_first_property (component, I_CAL_DTSTART_PROPERTY);
@@ -318,7 +321,10 @@ ece_event_update_timezone (ECompEditorEvent *event_editor,
 
                dtend = i_cal_component_get_dtend (component);
                if (!zone && i_cal_time_is_valid_time (dtend)) {
-                       if (i_cal_time_is_utc (dtend)) {
+                       if (i_cal_time_is_date (dtend)) {
+                               zone = NULL;
+                               is_date_value = TRUE;
+                       } else if (i_cal_time_is_utc (dtend)) {
                                zone = i_cal_timezone_get_utc_timezone ();
                        } else {
                                prop = i_cal_component_get_first_property (component, I_CAL_DTEND_PROPERTY);
@@ -335,7 +341,10 @@ ece_event_update_timezone (ECompEditorEvent *event_editor,
 
                itt = i_cal_component_get_due (component);
                if (itt && i_cal_time_is_valid_time (itt)) {
-                       if (i_cal_time_is_utc (itt)) {
+                       if (i_cal_time_is_date (itt)) {
+                               zone = NULL;
+                               is_date_value = TRUE;
+                       } else if (i_cal_time_is_utc (itt)) {
                                zone = i_cal_timezone_get_utc_timezone ();
                        } else {
                                prop = i_cal_component_get_first_property (component, I_CAL_DUE_PROPERTY);
@@ -353,7 +362,10 @@ ece_event_update_timezone (ECompEditorEvent *event_editor,
 
                edit_widget = e_comp_editor_property_part_get_edit_widget (event_editor->priv->timezone);
 
-               e_timezone_entry_set_timezone (E_TIMEZONE_ENTRY (edit_widget), zone);
+               if (!zone && is_date_value)
+                       e_timezone_entry_set_timezone (E_TIMEZONE_ENTRY (edit_widget), 
calendar_config_get_icaltimezone ());
+               else
+                       e_timezone_entry_set_timezone (E_TIMEZONE_ENTRY (edit_widget), zone);
 
                cfg_zone = calendar_config_get_icaltimezone ();