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/*
* 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.reset(
g_cancellable_new(),
[](GCancellable* o){
g_cancellable_cancel(o);
g_clear_object(&o);
}
);
g_bus_get(G_BUS_TYPE_SESSION, m_cancellable.get(), on_bus_ready, this);
}
~Impl() =default;
core::Property<State>& state()
{
return m_state;
}
private:
void set_state(const State& state)
{
g_message("%s setting state to %s", G_STRLOC, state_str(state));
m_state.set(state);
}
static void on_bus_ready(
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("Greeter: Error getting bus: %s", error->message);
g_clear_error(&error);
}
else
{
auto self = static_cast<Impl*>(gself);
const auto watcher_id = g_bus_watch_name_on_connection(
bus,
DBusNames::UnityGreeter::NAME,
G_BUS_NAME_WATCHER_FLAGS_AUTO_START,
on_greeter_appeared,
on_greeter_vanished,
gself,
nullptr);
const auto subscription_id = g_dbus_connection_signal_subscribe(
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,
gself,
nullptr);
self->m_bus.reset(
bus,
[watcher_id, subscription_id](GDBusConnection* o){
g_bus_unwatch_name(watcher_id);
g_dbus_connection_signal_unsubscribe(o, subscription_id);
g_clear_object(&o);
}
);
}
}
static void on_greeter_appeared(
GDBusConnection* bus,
const char* name,
const char* name_owner,
gpointer gself)
{
g_message("%s %s appared on bus, owned by %s", G_STRLOC, name, name_owner);
auto self = static_cast<Impl*>(gself);
self->m_owner = name_owner;
g_dbus_connection_call(
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,
self->m_cancellable.get(),
on_get_is_active_ready,
gself);
}
static void on_greeter_vanished(
GDBusConnection* /*bus*/,
const char* name,
gpointer gself)
{
g_message("%s %s disappeared from bus", G_STRLOC, name);
auto self = static_cast<Impl*>(gself);
self->m_owner.clear();
self->set_state(State::UNAVAILABLE);
}
static void on_get_is_active_ready(
GObject* source,
GAsyncResult* res,
gpointer gself)
{
g_message("%s", G_STRLOC);
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("Greeter: Error getting IsActive property: %s", error->message);
g_clear_error(&error);
} else {
g_message("%s got '%s'", G_STRLOC, g_variant_print(v, true));
GVariant* is_active {};
g_variant_get_child(v, 0, "v", &is_active);
static_cast<Impl*>(gself)->set_state(g_variant_get_boolean(is_active) ? State::ACTIVE : State::INACTIVE);
g_clear_pointer(&is_active, g_variant_unref);
}
g_clear_pointer(&v, g_variant_unref);
}
static void on_properties_changed_signal(
GDBusConnection* /*bus*/,
const gchar* sender_name,
const gchar* object_path,
const gchar* interface_name,
const gchar* signal_name,
GVariant* parameters,
gpointer gself)
{
auto self = static_cast<Impl*>(gself);
g_message("%s on_properties_changed got %s", G_STRLOC, g_variant_print(parameters, true));
g_return_if_fail(!g_strcmp0(sender_name, self->m_owner.c_str()));
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))
self->set_state(is_active ? State::ACTIVE : State::INACTIVE);
g_clear_pointer(&v, g_variant_unref);
}
core::Property<State> m_state {State::UNAVAILABLE};
std::shared_ptr<GCancellable> m_cancellable;
std::shared_ptr<GDBusConnection> m_bus;
std::string m_owner;
};
/***
****
***/
Greeter::Greeter() =default;
Greeter::~Greeter() =default;
UnityGreeter::UnityGreeter():
impl{new Impl{}}
{
}
UnityGreeter::~UnityGreeter() =default;
core::Property<Greeter::State>&
UnityGreeter::state()
{
return impl->state();
}
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