From bcc04892148c7396e638f45e96fcba42d0034ec7 Mon Sep 17 00:00:00 2001
From: Charles Kerr <charles.kerr@canonical.com>
Date: Thu, 17 Oct 2013 16:32:44 -0500
Subject: refactor the timezone and current time provider into a gobject
 Interface 'IndicatorDatetimeClock'

---
 src/clock.c | 110 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 src/clock.c

(limited to 'src/clock.c')

diff --git a/src/clock.c b/src/clock.c
new file mode 100644
index 0000000..1abdd21
--- /dev/null
+++ b/src/clock.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2013 Canonical Ltd.
+ *
+ * Authors:
+ *   Charles Kerr <charles.kerr@canonical.com>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 3, as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranties of
+ * MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "clock.h"
+
+enum
+{
+  SIGNAL_CHANGED,
+  SIGNAL_LAST
+};
+
+static guint signals[SIGNAL_LAST] = { 0 };
+
+G_DEFINE_INTERFACE (IndicatorDatetimeClock,
+                    indicator_datetime_clock,
+                    0);
+
+static void
+indicator_datetime_clock_default_init (IndicatorDatetimeClockInterface * klass)
+{
+  signals[SIGNAL_CHANGED] = g_signal_new (
+      "changed",
+      G_TYPE_FROM_CLASS(klass),
+      G_SIGNAL_RUN_LAST,
+      G_STRUCT_OFFSET (IndicatorDatetimeClockInterface, changed),
+      NULL, NULL,
+      g_cclosure_marshal_VOID__VOID,
+      G_TYPE_NONE, 0);
+}
+
+/***
+****  PUBLIC API
+***/
+
+/**
+ * Get a strv of timezones.
+ *
+ * Return value: (element-type char*)
+ *               (transfer full):
+ *               array of timezone strings
+ */
+gchar **
+indicator_datetime_clock_get_timezones (IndicatorDatetimeClock * self)
+{
+  gchar ** timezones;
+  IndicatorDatetimeClockInterface * iface;
+
+  g_return_val_if_fail (INDICATOR_IS_DATETIME_CLOCK(self), NULL);
+  iface = INDICATOR_DATETIME_CLOCK_GET_INTERFACE(self);
+
+  if (iface->get_timezones != NULL)
+    timezones = iface->get_timezones (self);
+  else
+    timezones = NULL;
+
+  return timezones;
+}
+
+/**
+ * Get the current time.
+ *
+ * Return value: (element-type GDateTime*)
+ *               (transfer full):
+ *               the current time.
+ */
+GDateTime *
+indicator_datetime_clock_get_current_time (IndicatorDatetimeClock * self)
+{
+  GDateTime * now;
+  IndicatorDatetimeClockInterface * iface;
+
+  g_return_val_if_fail (INDICATOR_IS_DATETIME_CLOCK(self), NULL);
+  iface = INDICATOR_DATETIME_CLOCK_GET_INTERFACE(self);
+
+  if (iface->get_current_time != NULL)
+    now = iface->get_current_time (self);
+  else
+    now = NULL;
+
+  return now;
+}
+
+/**
+ * Emits the "changed" signal.
+ *
+ * This should only be called by subclasses.
+ */
+void
+indicator_datetime_clock_emit_changed (IndicatorDatetimeClock * self)
+{
+  g_return_if_fail (INDICATOR_IS_DATETIME_CLOCK (self));
+
+  g_signal_emit (self, signals[SIGNAL_CHANGED], 0, NULL);
+}
-- 
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