When a new device appears to ADB, prompt the user whether or not to allow the connection.

Approved by: PS Jenkins bot, Charles Kerr, Xavi Garcia

1 files changed, 161 insertions, 0 deletions

diff --git a/src/greeter.cpp b/src/greeter.cpp
new file mode 100644
index 0000000..f9cd965
--- /dev/null
+++ b/src/greeter.cpp
@@ -0,0 +1,161 @@
+/*
+ * 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)));
+
+        g_dbus_connection_call(m_bus,
+                               DBusNames::UnityGreeter::NAME,
+                               DBusNames::UnityGreeter::PATH,
+                               DBusNames::Properties::INTERFACE,
+                               "Get",
+                               g_variant_new("(ss)", DBusNames::UnityGreeter::INTERFACE, "IsActive"),
+                               G_VARIANT_TYPE("(v)"),
+                               G_DBUS_CALL_FLAGS_NONE,
+                               -1,
+                               m_cancellable,
+                               on_get_is_active_ready,
+                               this);
+
+        m_subscription_id = g_dbus_connection_signal_subscribe(m_bus,
+                                                               DBusNames::UnityGreeter::NAME,
+                                                               DBusNames::Properties::INTERFACE,
+                                                               DBusNames::Properties::PropertiesChanged::NAME,
+                                                               DBusNames::UnityGreeter::PATH,
+                                                               DBusNames::UnityGreeter::INTERFACE,
+                                                               G_DBUS_SIGNAL_FLAGS_NONE,
+                                                               on_properties_changed_signal,
+                                                               this,
+                                                               nullptr);
+    }
+
+    static void on_get_is_active_ready(GObject* source, GAsyncResult* res, gpointer gself)
+    {
+        GError* error {};
+        auto v = g_dbus_connection_call_finish(G_DBUS_CONNECTION(source), 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 {
+            GVariant* is_active {};
+            g_variant_get_child(v, 0, "v", &is_active);
+            static_cast<Impl*>(gself)->m_is_active.set(g_variant_get_boolean(is_active));
+            g_clear_pointer(&is_active, g_variant_unref);
+        }
+        g_clear_pointer(&v, g_variant_unref);
+    }
+
+    static void on_properties_changed_signal(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(object_path, DBusNames::UnityGreeter::PATH));
+        g_return_if_fail(!g_strcmp0(interface_name, DBusNames::Properties::INTERFACE));
+        g_return_if_fail(!g_strcmp0(signal_name, DBusNames::Properties::PropertiesChanged::NAME));
+        g_return_if_fail(g_variant_is_of_type(parameters, G_VARIANT_TYPE(DBusNames::Properties::PropertiesChanged::ARGS_VARIANT_TYPE)));
+
+        auto v = g_variant_get_child_value (parameters, 1);
+        gboolean is_active {};
+        if (g_variant_lookup(v, "IsActive", "b", &is_active))
+        {
+            g_debug("%s is_active changed to %d", G_STRLOC, int(is_active));
+            static_cast<Impl*>(gself)->m_is_active.set(is_active);
+        }
+        g_clear_pointer(&v, g_variant_unref);
+    }
+
+    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():
+    impl{new Impl{}}
+{
+}
+
+UnityGreeter::~UnityGreeter() =default;
+
+core::Property<bool>&
+UnityGreeter::is_active()
+{
+    return impl->is_active();
+}