From dac959d85813debca9762eaf4c4cf8cebc1090fe Mon Sep 17 00:00:00 2001
From: Chenthill Palanisamy <pchenthill@novell.com>
Date: Fri, 16 Apr 2010 13:37:40 +0200
Subject: Bug 596601 (bnc) - monitor system timezone changes in evolution

---
 modules/calendar/e-cal-shell-view-private.c | 85 ++++++++++++++++++++++++++++-
 modules/calendar/e-cal-shell-view-private.h |  4 ++
 2 files changed, 88 insertions(+), 1 deletion(-)

(limited to 'modules/calendar')

diff --git a/modules/calendar/e-cal-shell-view-private.c b/modules/calendar/e-cal-shell-view-private.c
index dc30897aab..c669c29b33 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 c69ffc7605..71a191f332 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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