add Greeter skeleton

4 files changed, 178 insertions, 0 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index cdd2384..060071d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -10,6 +10,7 @@ add_library(
     STATIC
     adbd-client.cpp
     exporter.cpp
+    greeter.cpp
     indicator.cpp
     rotation-lock.cpp
     usb-manager.cpp
diff --git a/src/dbus-names.h b/src/dbus-names.h
index 753b8c8..3127b9f 100644
--- a/src/dbus-names.h
+++ b/src/dbus-names.h
@@ -38,5 +38,12 @@ namespace DBusNames
             enum Reason { EXPIRED=1, DISMISSED=2, API=3, UNDEFINED=4 };
         }
     }
+
+    namespace UnityGreeter
+    {
+        static constexpr char const * NAME = "com.canonical.UnityGreeter";
+        static constexpr char const * PATH = "/";
+        static constexpr char const * INTERFACE = "com.canonical.UnityGreeter";
+    }
 }
 
diff --git a/src/greeter.cpp b/src/greeter.cpp
new file mode 100644
index 0000000..351b870
--- /dev/null
+++ b/src/greeter.cpp
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2016 Canonical Ltd.
+ *
+ * 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/>.
+ *
+ * Authors:
+ *   Charles Kerr <charles.kerr@canonical.com>
+ */
+
+#include <src/dbus-names.h>
+#include <src/greeter.h>
+
+#include <gio/gio.h>
+
+class UnityGreeter::Impl
+{
+public:
+
+    Impl():
+        m_cancellable{g_cancellable_new()}
+    {
+        g_bus_get(G_BUS_TYPE_SESSION, m_cancellable, on_bus_ready_static, this);
+    }
+
+    ~Impl()
+    {
+        g_cancellable_cancel(m_cancellable);
+        g_clear_object(&m_cancellable);
+
+        if (m_subscription_id != 0)
+            g_dbus_connection_signal_unsubscribe (m_bus, m_subscription_id);
+
+        g_clear_object(&m_bus);
+    }
+
+    core::Property<bool>& is_active()
+    {
+        return m_is_active;
+    }
+
+private:
+
+    static void on_bus_ready_static(GObject* /*source*/, GAsyncResult* res, gpointer gself)
+    {
+        GError* error {};
+        auto bus = g_bus_get_finish (res, &error);
+        if (error != nullptr) {
+            if (!g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+                g_warning("UsbSnap: Error getting session bus: %s", error->message);
+            g_clear_error(&error);
+        } else {
+            static_cast<Impl*>(gself)->on_bus_ready(bus);
+        }
+        g_clear_object(&bus);
+    }
+
+    void on_bus_ready(GDBusConnection* bus)
+    {
+        m_bus = G_DBUS_CONNECTION(g_object_ref(G_OBJECT(bus)));
+
+        m_subscription_id = g_dbus_connection_signal_subscribe(m_bus,
+                                                               DBusNames::UnityGreeter::NAME,
+                                                               "org.freedesktop.DBus.Properties",
+                                                               "PropertiesChanged",
+                                                               DBusNames::UnityGreeter::PATH,
+                                                               nullptr,
+                                                               G_DBUS_SIGNAL_FLAGS_NONE,
+                                                               on_properties_changed_signal_static,
+                                                               this,
+                                                               nullptr);
+    }
+
+    static void on_properties_changed_signal_static(GDBusConnection* /*connection*/,
+                                                    const gchar* sender_name,
+                                                    const gchar* object_path,
+                                                    const gchar* interface_name,
+                                                    const gchar* signal_name,
+                                                    GVariant* parameters,
+                                                    gpointer gself)
+    {
+        g_return_if_fail(!g_strcmp0(sender_name, DBusNames::UnityGreeter::NAME));
+        g_return_if_fail(!g_strcmp0(object_path, DBusNames::UnityGreeter::PATH));
+        g_return_if_fail(!g_strcmp0(interface_name, "org.freedesktop.DBus.Properties"));
+        g_return_if_fail(!g_strcmp0(signal_name, "PropertiesChanged"));
+
+        static_cast<Impl*>(gself)->on_properties_changed_signal(parameters);
+    }
+
+    void on_properties_changed_signal(GVariant* parameters)
+    {
+        g_message("%s %s", G_STRLOC, g_variant_print(parameters, true));
+    }
+
+    core::Property<bool> m_is_active;
+    GCancellable* m_cancellable {};
+    GDBusConnection* m_bus {};
+    unsigned int m_subscription_id {};
+};
+
+/***
+****
+***/
+
+Greeter::Greeter() =default;
+
+Greeter::~Greeter() =default;
+
+UnityGreeter::~UnityGreeter() =default;
+
+UnityGreeter::UnityGreeter():
+    impl{new Impl{}}
+{
+}
diff --git a/src/greeter.h b/src/greeter.h
new file mode 100644
index 0000000..e084d25
--- /dev/null
+++ b/src/greeter.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2016 Canonical Ltd.
+ *
+ * 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/>.
+ *
+ * Authors:
+ *   Charles Kerr <charles.kerr@canonical.com>
+ */
+
+#pragma once
+
+#include <core/property.h>
+
+#include <memory>
+#include <string>
+
+class Greeter
+{
+public:
+    Greeter();
+    virtual ~Greeter();
+    virtual core::Property<bool>& is_active() =0;
+};
+
+
+class UnityGreeter: public Greeter
+{
+public:
+    UnityGreeter();
+    virtual ~UnityGreeter();
+    core::Property<bool>& is_active() override;
+
+protected:
+    class Impl;
+    std::unique_ptr<Impl> impl;
+};
+