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[evolution/gnome-2-30] Bug 596601 (bnc) - monitor system timezone changes in evolution

commit dac959d85813debca9762eaf4c4cf8cebc1090fe
Author: Chenthill Palanisamy <pchenthill novell com>
Date:   Fri Apr 16 13:37:40 2010 +0200

    Bug 596601 (bnc) - monitor system timezone changes in evolution

 calendar/gui/e-cal-model.c                  |   15 +++++
 calendar/gui/e-cal-model.h                  |    3 +
 calendar/gui/e-day-view.c                   |   11 ++--
 calendar/gui/e-week-view.c                  |   14 +++--
 modules/calendar/e-cal-shell-view-private.c |   85 ++++++++++++++++++++++++++-
 modules/calendar/e-cal-shell-view-private.h |    4 +
 6 files changed, 119 insertions(+), 13 deletions(-)
---
diff --git a/calendar/gui/e-cal-model.c b/calendar/gui/e-cal-model.c
index 5cf2094..cb1966f 100644
--- a/calendar/gui/e-cal-model.c
+++ b/calendar/gui/e-cal-model.c
@@ -141,6 +141,7 @@ enum {
 	CAL_VIEW_PROGRESS,
 	CAL_VIEW_DONE,
 	STATUS_MESSAGE,
+	TIMEZONE_CHANGED,
 	LAST_SIGNAL
 };
 
@@ -474,6 +475,16 @@ e_cal_model_class_init (ECalModelClass *class)
 		e_marshal_VOID__STRING_DOUBLE,
 		G_TYPE_NONE, 2,
 		G_TYPE_STRING, G_TYPE_DOUBLE);
+	signals[TIMEZONE_CHANGED] = g_signal_new (
+		"timezone-changed",
+		G_TYPE_FROM_CLASS (class),
+		G_SIGNAL_RUN_LAST,
+		G_STRUCT_OFFSET (ECalModelClass, timezone_changed),
+		NULL, NULL,
+		e_marshal_VOID__POINTER_POINTER,
+		G_TYPE_NONE, 2,
+		G_TYPE_POINTER,
+		G_TYPE_POINTER);
 }
 
 static void
@@ -1434,12 +1445,14 @@ void
 e_cal_model_set_timezone (ECalModel *model,
                           icaltimezone *zone)
 {
+	icaltimezone *old_zone;
 	g_return_if_fail (E_IS_CAL_MODEL (model));
 
 	if (model->priv->zone == zone)
 		return;
 
 	e_table_model_pre_change (E_TABLE_MODEL (model));
+	old_zone = model->priv->zone;
 	model->priv->zone = zone;
 
 	/* the timezone affects the times shown for date fields,
@@ -1447,6 +1460,8 @@ e_cal_model_set_timezone (ECalModel *model,
 	e_table_model_changed (E_TABLE_MODEL (model));
 
 	g_object_notify (G_OBJECT (model), "timezone");
+	g_signal_emit (G_OBJECT (model), signals[TIMEZONE_CHANGED], 0,
+		       old_zone, zone);
 }
 
 void
diff --git a/calendar/gui/e-cal-model.h b/calendar/gui/e-cal-model.h
index 2d30f18..0b31ca3 100644
--- a/calendar/gui/e-cal-model.h
+++ b/calendar/gui/e-cal-model.h
@@ -167,6 +167,9 @@ struct _ECalModelClass {
 	void		(*status_message)	(ECalModel *model,
 						 const gchar *message,
 						 gdouble percent);
+	void		(*timezone_changed)	(ECalModel *model,
+						 icaltimezone *old_zone,
+						 icaltimezone *new_zone);
 };
 
 typedef time_t (*ECalModelDefaultTimeFunc) (ECalModel *model, gpointer user_data);
diff --git a/calendar/gui/e-day-view.c b/calendar/gui/e-day-view.c
index 3df599f..9fb0a78 100644
--- a/calendar/gui/e-day-view.c
+++ b/calendar/gui/e-day-view.c
@@ -992,12 +992,13 @@ model_comps_deleted_cb (ETableModel *etm, gpointer data, gpointer user_data)
 }
 
 static void
-timezone_changed_cb (ECalendarView *cal_view, icaltimezone *old_zone,
+timezone_changed_cb (ECalModel *cal_model, icaltimezone *old_zone,
 		     icaltimezone *new_zone, gpointer user_data)
 {
 	struct icaltimetype tt;
 	time_t lower;
-	EDayView *day_view = (EDayView *) cal_view;
+	EDayView *day_view = (EDayView *) user_data;
+	ECalendarView *cal_view = (ECalendarView *) day_view;
 
 	g_return_if_fail (E_IS_DAY_VIEW (day_view));
 
@@ -1338,10 +1339,6 @@ e_day_view_init (EDayView *day_view)
 		GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_ASK);
 
 	e_drag_dest_add_calendar_targets (day_view->main_canvas);
-
-	/* connect to ECalendarView's signals */
-	g_signal_connect (G_OBJECT (day_view), "timezone_changed",
-			  G_CALLBACK (timezone_changed_cb), NULL);
 }
 
 static void
@@ -1358,6 +1355,8 @@ init_model (EDayView *day_view, ECalModel *model)
 			  G_CALLBACK (model_rows_inserted_cb), day_view);
 	g_signal_connect (G_OBJECT (model), "comps_deleted",
 			  G_CALLBACK (model_comps_deleted_cb), day_view);
+	g_signal_connect (G_OBJECT (model), "timezone_changed",
+			  G_CALLBACK (timezone_changed_cb), day_view);
 }
 
 /* Turn off the background of the canvas windows. This reduces flicker
diff --git a/calendar/gui/e-week-view.c b/calendar/gui/e-week-view.c
index c319520..b96ec7e 100644
--- a/calendar/gui/e-week-view.c
+++ b/calendar/gui/e-week-view.c
@@ -422,11 +422,12 @@ week_view_time_range_changed_cb (EWeekView *week_view,
 }
 
 static void
-timezone_changed_cb (ECalendarView *cal_view,
+timezone_changed_cb (ECalModel *cal_model,
                      icaltimezone *old_zone,
                      icaltimezone *new_zone,
                      gpointer user_data)
 {
+	ECalendarView *cal_view = (ECalendarView *) user_data;
 	struct icaltimetype tt = icaltime_null_time ();
 	time_t lower;
 	EWeekView *week_view = (EWeekView *) cal_view;
@@ -829,10 +830,6 @@ e_week_view_init (EWeekView *week_view)
 	week_view->move_cursor = gdk_cursor_new (GDK_FLEUR);
 	week_view->resize_width_cursor = gdk_cursor_new (GDK_SB_H_DOUBLE_ARROW);
 	week_view->last_cursor_set = NULL;
-
-		/* connect to ECalendarView's signals */
-	g_signal_connect (G_OBJECT (week_view), "timezone_changed",
-			  G_CALLBACK (timezone_changed_cb), NULL);
 }
 
 /**
@@ -844,9 +841,14 @@ e_week_view_init (EWeekView *week_view)
 ECalendarView *
 e_week_view_new (ECalModel *model)
 {
+	ECalendarView *view;
 	g_return_val_if_fail (E_IS_CAL_MODEL (model), NULL);
 
-	return g_object_new (E_TYPE_WEEK_VIEW, "model", model, NULL);
+	view = g_object_new (E_TYPE_WEEK_VIEW, "model", model, NULL);
+
+	g_signal_connect (G_OBJECT (model), "timezone_changed",
+			  G_CALLBACK (timezone_changed_cb), view);
+	return view;
 }
 
 static void
diff --git a/modules/calendar/e-cal-shell-view-private.c b/modules/calendar/e-cal-shell-view-private.c
index dc30897..c669c29 100644
--- a/modules/calendar/e-cal-shell-view-private.c
+++ b/modules/calendar/e-cal-shell-view-private.c
@@ -26,6 +26,16 @@
 #include "calendar/gui/calendar-view-factory.h"
 #include "widgets/menus/gal-view-factory-etable.h"
 
+#define CHECK_NB	5
+
+static const gchar * files_to_check [CHECK_NB] = {
+        ETC_TIMEZONE,
+        ETC_TIMEZONE_MAJ,
+        ETC_SYSCONFIG_CLOCK,
+        ETC_CONF_D_CLOCK,
+        ETC_LOCALTIME
+};
+
 static void
 cal_shell_view_process_completed_tasks (ECalShellView *cal_shell_view,
                                         gboolean config_changed)
@@ -416,6 +426,72 @@ e_cal_shell_view_private_init (ECalShellView *cal_shell_view,
 		G_CALLBACK (cal_shell_view_notify_view_id_cb), NULL);
 }
 
+	
+static void
+system_timezone_monitor_changed (GFileMonitor *handle,
+                                 GFile *file,
+                                 GFile *other_file,
+                                 GFileMonitorEvent event,
+                                 gpointer user_data)
+{
+        ECalShellView  *view = E_CAL_SHELL_VIEW (user_data);
+	ECalShellViewPrivate *priv = view->priv;
+	ECalShellContent *cal_shell_content;
+	icaltimezone *timezone = NULL, *current_zone = NULL;
+	EShellSettings *settings;
+	EShellBackend *shell_backend;
+	EShell *shell;
+	ECalModel *model;
+	const gchar *location;
+ 
+ 	if (event != G_FILE_MONITOR_EVENT_CHANGED &&
+            event != G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT &&
+            event != G_FILE_MONITOR_EVENT_DELETED &&
+            event != G_FILE_MONITOR_EVENT_CREATED)
+                return;
+
+	cal_shell_content = priv->cal_shell_content;
+	model = e_cal_shell_content_get_model (cal_shell_content);
+	current_zone = e_cal_model_get_timezone (model);
+	timezone = e_cal_util_get_system_timezone ();
+
+	if (!g_strcmp0 (icaltimezone_get_tzid (timezone), icaltimezone_get_tzid (current_zone)))
+		return;
+
+	shell_backend = e_shell_view_get_shell_backend ((EShellView *) view);
+	shell = e_shell_backend_get_shell (shell_backend);
+	settings = e_shell_get_shell_settings (shell);
+	location = icaltimezone_get_location (timezone);
+	if (location == NULL)
+		location = "UTC";
+	
+	g_object_set (settings, "cal-timezone-string", location, NULL);
+	g_object_set (settings, "cal-timezone", timezone, NULL);
+}
+
+static void
+init_timezone_monitors (ECalShellView *view)
+{
+	ECalShellViewPrivate *priv = view->priv;
+	gint i;
+
+	for (i = 0; i < CHECK_NB; i++) {
+		GFile *file;
+
+		file = g_file_new_for_path (files_to_check[i]);
+		priv->monitors[i] = g_file_monitor_file (file,
+				G_FILE_MONITOR_NONE,
+				NULL, NULL);
+		g_object_unref (file);
+
+		if (priv->monitors[i])
+			g_signal_connect (G_OBJECT (priv->monitors[i]),
+					"changed", 
+					G_CALLBACK (system_timezone_monitor_changed),
+					view);
+	}
+}
+
 void
 e_cal_shell_view_private_constructed (ECalShellView *cal_shell_view)
 {
@@ -569,6 +645,7 @@ e_cal_shell_view_private_constructed (ECalShellView *cal_shell_view)
 		(GHookFunc) e_cal_shell_view_update_search_filter,
 		cal_shell_view);
 
+	init_timezone_monitors (cal_shell_view);
 	e_cal_shell_view_actions_init (cal_shell_view);
 	e_cal_shell_view_update_sidebar (cal_shell_view);
         e_cal_shell_view_update_search_filter (cal_shell_view);
@@ -592,6 +669,7 @@ void
 e_cal_shell_view_private_dispose (ECalShellView *cal_shell_view)
 {
 	ECalShellViewPrivate *priv = cal_shell_view->priv;
+	gint i;
 
 	/* Calling calendar's save state from here, because it is too late in its dispose */
 	if (priv->cal_shell_content)
@@ -621,6 +699,11 @@ e_cal_shell_view_private_dispose (ECalShellView *cal_shell_view)
 		g_object_unref (priv->taskpad_activity);
 		priv->taskpad_activity = NULL;
 	}
+
+	for (i = 0; i < CHECK_NB; i++) {
+		g_object_unref (priv->monitors[i]);
+		priv->monitors[i] = NULL;
+	}
 }
 
 void
@@ -982,7 +1065,7 @@ e_cal_shell_view_update_timezone (ECalShellView *cal_shell_view)
 
 	cal_shell_sidebar = cal_shell_view->priv->cal_shell_sidebar;
 	clients = e_cal_shell_sidebar_get_clients (cal_shell_sidebar);
-
+	
 	for (iter = clients; iter != NULL; iter = iter->next) {
 		ECal *client = iter->data;
 
diff --git a/modules/calendar/e-cal-shell-view-private.h b/modules/calendar/e-cal-shell-view-private.h
index c69ffc7..71a191f 100644
--- a/modules/calendar/e-cal-shell-view-private.h
+++ b/modules/calendar/e-cal-shell-view-private.h
@@ -27,6 +27,7 @@
 #include <string.h>
 #include <glib/gi18n.h>
 #include <libecal/e-cal-time-util.h>
+#include <libecal/e-cal-system-timezone.h>
 #include <libedataserver/e-categories.h>
 #include <libedataserver/e-data-server-util.h>
 #include <libedataserver/e-sexp.h>
@@ -81,6 +82,7 @@
 
 /* ETable Specifications */
 #define ETSPEC_FILENAME		"e-calendar-table.etspec"
+#define CHECK_NB	5
 
 G_BEGIN_DECLS
 
@@ -114,6 +116,8 @@ struct _ECalShellViewPrivate {
 	EActivity *calendar_activity;
 	EActivity *memopad_activity;
 	EActivity *taskpad_activity;
+
+        GFileMonitor *monitors[CHECK_NB];
 };
 
 void		e_cal_shell_view_private_init
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