Merge lp:~larsu/indicator-datetime/dont-use-gdbusproxy into lp:indicator-datetime/15.10

[Lars Karlitski]

Use timedated's Timezone property to find out the current timezone and learn about changes to it

Use timedated's Timezone property to find out the current timezone and learn about changes to it

[PS Jenkins bot (ps-jenkins)]

PASSED: Continuous integration, rev:426
http://jenkins.qa.ubuntu.com/job/indicator-datetime-ci/331/
Executed test runs:
    SUCCESS: http://jenkins.qa.ubuntu.com/job/indicator-datetime-wily-amd64-ci/21
    SUCCESS: http://jenkins.qa.ubuntu.com/job/indicator-datetime-wily-armhf-ci/21
        deb: http://jenkins.qa.ubuntu.com/job/indicator-datetime-wily-armhf-ci/21/artifact/work/output/*zip*/output.zip

Click here to trigger a rebuild:
http://s-jenkins.ubuntu-ci:8080/job/indicator-datetime-ci/331/rebuild

review: Approve (continuous-integration)

[Charles Kerr (charlesk)]

Oh, this is quite nice. Thank you!

review: Approve

[Charles Kerr (charlesk)]

superceded by https://code.launchpad.net/~larsu/indicator-datetime/remove-test-warnings/+merge/270076, which landed on 2015-09-09

review: Resubmit

Unmerged revisions

426. By Lars Karlitski on 2015-09-03

timezone-timedated: subscribe to PropertiesChanged directly

This avoids some unnecessary calls that GDBusProxy makes and the name
watching.

425. By Iain Lane on 2015-09-03

Make test-live-actions quit itself once the tz has been changed, the mock no longer does this

424. By Iain Lane on 2015-09-03

Avoid nested GMainLoops by reading from the file on startup

Restore some tests for this functionality.

423. By Iain Lane on 2015-09-01

Add some comments

422. By Iain Lane on 2015-09-01

Rename FileTimezone to TimedatedTimezone

421. By Iain Lane on 2015-09-01

Add a timeout so we can't hang forever

420. By Iain Lane on 2015-08-31

Use timedated's Timezone property instead of watching /etc/timezone

Still need to rename everything to not use "timezone-file"

=== modified file 'src/timezone-timedated.cpp'
--- src/timezone-timedated.cpp	2015-09-03 16:10:18 +0000
+++ src/timezone-timedated.cpp	2015-09-03 16:10:18 +0000
@@ -53,112 +53,42 @@
 
     void clear()
     {
-        if (m_bus_watch_id)
-        {
-            g_bus_unwatch_name (m_bus_watch_id);
-            m_bus_watch_id = 0;
-        }
-
-        if (m_properties_changed_id)
-        {
-            g_signal_handler_disconnect(m_proxy, m_properties_changed_id);
-            m_properties_changed_id = 0;
-        }
-
-        g_clear_object(&m_proxy);
+        if (m_connection && m_signal_subscription_id)
+        {
+            g_dbus_connection_signal_unsubscribe (m_connection, m_signal_subscription_id);
+            m_signal_subscription_id = 0;
+        }
+
+        g_clear_object(&m_connection);
     }
 
-    static void on_properties_changed(GDBusProxy *proxy G_GNUC_UNUSED,
-            GVariant *changed_properties /* a{sv} */,
-            GStrv invalidated_properties G_GNUC_UNUSED,
+    static void on_properties_changed (GDBusConnection *connection G_GNUC_UNUSED,
+            const gchar *sender_name G_GNUC_UNUSED,
+            const gchar *object_path G_GNUC_UNUSED,
+            const gchar *interface_name G_GNUC_UNUSED,
+            const gchar *signal_name G_GNUC_UNUSED,
+            GVariant *parameters,
             gpointer gself)
     {
         auto self = static_cast<Impl*>(gself);
-        char *tz;
-
-        if (g_variant_lookup(changed_properties, "Timezone", "s", &tz, NULL))
-        {
-            g_debug("on_properties_changed: got timezone '%s'", tz);
+        const char *tz;
+        GVariant *changed_properties;
+        gchar **invalidated_properties;
+
+        g_variant_get (parameters, "(s@a{sv}^as)", NULL, &changed_properties, &invalidated_properties);
+
+        if (g_variant_lookup(changed_properties, "Timezone", "&s", &tz, NULL))
             self->notify_timezone(tz);
-            g_free (tz);
-        }
-    }
-
-    static void on_proxy_ready(GObject *object G_GNUC_UNUSED,
-            GAsyncResult *res,
-            gpointer gself)
-    {
-        auto self = static_cast<Impl*>(gself);
-        GError *error = nullptr;
-        self->m_proxy = g_dbus_proxy_new_finish(res, &error);
-
-        if (error)
-        {
-            g_warning ("Couldn't create proxy to read timezone: %s", error->message);
-            goto out;
-        }
-
-        /* Read the property */
-        GVariant *prop;
-        prop = g_dbus_proxy_get_cached_property(self->m_proxy, "Timezone");
-
-        if (!prop || !g_variant_is_of_type(prop, G_VARIANT_TYPE_STRING))
-        {
-            g_warning("Couldn't read the Timezone property, defaulting to Etc/Utc");
-            self->notify_timezone("Etc/Utc");
-            goto out;
-        }
-
-        const gchar *tz;
-        tz = g_variant_get_string(prop, nullptr);
-
-        self->notify_timezone(tz);
-
-        self->m_properties_changed_id = g_signal_connect(self->m_proxy,
-                "g-properties-changed",
-                (GCallback) on_properties_changed,
-                gself);
-
-out:
-        g_clear_pointer(&error, g_error_free);
-        g_clear_pointer(&prop, g_variant_unref);
-    }
-
-    static void on_name_appeared(GDBusConnection *connection,
-            const gchar *name,
-            const gchar *name_owner G_GNUC_UNUSED,
-            gpointer gself G_GNUC_UNUSED)
-    {
-        g_debug ("timedate1 appeared");
-        g_dbus_proxy_new(connection,
-                G_DBUS_PROXY_FLAGS_NONE,
-                NULL,
-                name,
-                "/org/freedesktop/timedate1",
-                "org.freedesktop.timedate1",
-                nullptr,
-                on_proxy_ready,
-                gself);
-    }
-
-    static void on_name_vanished(GDBusConnection *connection G_GNUC_UNUSED,
-            const gchar *name G_GNUC_UNUSED,
-            gpointer gself)
-    {
-        auto self = static_cast<Impl*>(gself);
-        g_debug ("timedate1 vanished");
-
-        g_signal_handler_disconnect(self->m_proxy,
-                self->m_properties_changed_id);
-        self->m_properties_changed_id = 0;
-        g_clear_object(&self->m_proxy);
-        g_clear_pointer(&self->m_proxy, g_main_loop_unref);
+        else if (g_strv_contains (invalidated_properties, "Timezone"))
+            self->notify_timezone(self->get_timezone_from_file(self->m_filename));
+
+        g_variant_unref (changed_properties);
+        g_strfreev (invalidated_properties);
     }
 
     void monitor_timezone_property()
     {
         GError *err = nullptr;
-        GDBusConnection *conn;
 
         /*
          * There is an unlikely race which happens if there is an activation
@@ -170,7 +100,7 @@
          * Make sure the bus is around at least until we add the match rules,
          * otherwise things (tests) are sad.
          */
-        conn = g_bus_get_sync(G_BUS_TYPE_SYSTEM,
+        m_connection = g_bus_get_sync(G_BUS_TYPE_SYSTEM,
                 nullptr,
                 &err);
 
@@ -181,15 +111,14 @@
             return;
         }
 
-        m_bus_watch_id = g_bus_watch_name_on_connection(conn,
+        m_signal_subscription_id = g_dbus_connection_signal_subscribe(m_connection,
                 "org.freedesktop.timedate1",
-                G_BUS_NAME_WATCHER_FLAGS_NONE,
-                on_name_appeared,
-                on_name_vanished,
-                this,
-                nullptr);
-
-        g_object_unref (conn);
+                "org.freedesktop.DBus.Properties",
+                "PropertiesChanged",
+                "/org/freedesktop/timedate1",
+                NULL, G_DBUS_SIGNAL_FLAGS_NONE,
+                on_properties_changed,
+                this, nullptr);
     }
 
     void notify_timezone(std::string new_timezone)
@@ -256,9 +185,8 @@
     ***/
 
     TimedatedTimezone & m_owner;
-    unsigned long m_properties_changed_id = 0;
-    unsigned long m_bus_watch_id = 0;
-    GDBusProxy *m_proxy = nullptr;
+    GDBusConnection *m_connection = nullptr;
+    unsigned long m_signal_subscription_id = 0;
     std::string m_filename;
 };