From 9a69a192221d827f263e6972b9f07031b62676ef Mon Sep 17 00:00:00 2001
From: Milan Crha <mcrha@redhat.com>
Date: Thu, 15 Jan 2009 14:48:21 +0000
Subject: ** Fix for bug #245156

2009-01-15  Milan Crha  <mcrha@redhat.com>

	** Fix for bug #245156

	* gui/e-day-view.c: (e_day_view_finish_long_event_resize),
	(e_day_view_finish_resize), (e_day_view_change_event_time),
	(e_day_view_on_top_canvas_drag_data_received),
	(e_day_view_on_main_canvas_drag_data_received):
	* gui/e-week-view.c: (e_week_view_change_event_time):
	* gui/e-calendar-view.c: (on_unrecur_appointment):
	Keep old timezone for dtstart/dtend when changing it.
	* gui/comp-util.h: (cal_comp_set_dtstart_with_oldzone),
	(cal_comp_set_dtend_with_oldzone):
	* gui/comp-util.c: (cal_comp_set_dtstart_with_oldzone),
	(cal_comp_set_dtend_with_oldzone), (datetime_to_zone):
	Helper functions to make it easier.


svn path=/trunk/; revision=37079
---
 calendar/gui/comp-util.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

(limited to 'calendar/gui/comp-util.c')

diff --git a/calendar/gui/comp-util.c b/calendar/gui/comp-util.c
index 0e63a9c336..9504c7bda7 100644
--- a/calendar/gui/comp-util.c
+++ b/calendar/gui/comp-util.c
@@ -530,3 +530,80 @@ cal_comp_selection_get_string_list (GtkSelectionData *data)
 
 	return list;
 }
+
+static void
+datetime_to_zone (ECal *client, ECalComponentDateTime *date, const char *tzid)
+{
+	icaltimezone *from, *to;
+
+	g_return_if_fail (date != NULL);
+
+	if (date->tzid == NULL || tzid == NULL ||
+	    date->tzid == tzid || g_str_equal (date->tzid, tzid))
+		return;
+
+	from = icaltimezone_get_builtin_timezone_from_tzid (date->tzid);
+	if (!from) {
+		if (!e_cal_get_timezone (client, date->tzid, &from, NULL))
+			g_warning ("%s: Could not get timezone from server: %s", G_STRFUNC, date->tzid ? date->tzid : "");
+	}
+
+	to = icaltimezone_get_builtin_timezone_from_tzid (tzid);
+	if (!to) {
+		/* do not check failure here, maybe the zone is not available there */
+		e_cal_get_timezone (client, tzid, &to, NULL);
+	}
+
+	icaltimezone_convert_time (date->value, from, to);
+	date->tzid = tzid;
+}
+
+/**
+ * cal_comp_set_dtstart_with_oldzone:
+ * Changes 'dtstart' of the component, but converts time to the old timezone.
+ * @param client ECal structure, to retrieve timezone from, when required.
+ * @param comp Component, where make the change.
+ * @param pdate Value, to change to.
+ **/
+void
+cal_comp_set_dtstart_with_oldzone (ECal *client, ECalComponent *comp, const ECalComponentDateTime *pdate)
+{
+	ECalComponentDateTime olddate, date;
+
+	g_return_if_fail (comp != NULL);
+	g_return_if_fail (pdate != NULL);
+
+	e_cal_component_get_dtstart (comp, &olddate);
+
+	date = *pdate;
+
+	datetime_to_zone (client, &date, olddate.tzid);
+	e_cal_component_set_dtstart (comp, &date);
+
+	e_cal_component_free_datetime (&olddate);
+}
+
+/**
+ * cal_comp_set_dtend_with_oldzone:
+ * Changes 'dtend' of the component, but converts time to the old timezone.
+ * @param client ECal structure, to retrieve timezone from, when required.
+ * @param comp Component, where make the change.
+ * @param pdate Value, to change to.
+ **/
+void
+cal_comp_set_dtend_with_oldzone (ECal *client, ECalComponent *comp, const ECalComponentDateTime *pdate)
+{
+	ECalComponentDateTime olddate, date;
+
+	g_return_if_fail (comp != NULL);
+	g_return_if_fail (pdate != NULL);
+
+	e_cal_component_get_dtend (comp, &olddate);
+
+	date = *pdate;
+
+	datetime_to_zone (client, &date, olddate.tzid);
+	e_cal_component_set_dtend (comp, &date);
+
+	e_cal_component_free_datetime (&olddate);
+}
-- 
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