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/*
* Copyright 2013 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 <datetime/clock.h>
#include <datetime/dbus-shared.h>
#include <glib.h>
#include <gio/gio.h>
#include <map>
#include <set>
#include <string>
#include <vector>
namespace unity {
namespace indicator {
namespace datetime {
/***
****
***/
class Clock::Impl
{
public:
Impl(Clock& owner):
m_owner(owner),
m_cancellable(g_cancellable_new())
{
g_bus_get(G_BUS_TYPE_SYSTEM, m_cancellable, on_bus_ready, this);
}
~Impl()
{
g_cancellable_cancel(m_cancellable);
g_object_unref(m_cancellable);
for(const auto& tag : m_watched_names)
g_bus_unwatch_name(tag);
}
private:
static void on_bus_ready(GObject * /*source_object*/,
GAsyncResult * res,
gpointer gself)
{
GError * error = NULL;
GDBusConnection * bus;
if ((bus = g_bus_get_finish(res, &error)))
{
auto self = static_cast<Impl*>(gself);
auto tag = g_bus_watch_name_on_connection(bus,
"org.freedesktop.login1",
G_BUS_NAME_WATCHER_FLAGS_NONE,
on_login1_appeared,
on_login1_vanished,
gself, nullptr);
self->m_watched_names.insert(tag);
tag = g_bus_watch_name_on_connection(bus,
BUS_POWERD_NAME,
G_BUS_NAME_WATCHER_FLAGS_NONE,
on_powerd_appeared,
on_powerd_vanished,
gself, nullptr);
self->m_watched_names.insert(tag);
g_object_unref(bus);
}
else if (error != nullptr)
{
if (!g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
g_warning("%s Couldn't get system bus: %s", G_STRLOC, error->message);
g_error_free(error);
}
}
void remember_subscription(const std::string & name,
GDBusConnection * bus,
guint tag)
{
g_object_ref(bus);
auto deleter = [tag](GDBusConnection* bus){
g_dbus_connection_signal_unsubscribe(bus, tag);
g_object_unref(G_OBJECT(bus));
};
m_subscriptions[name].push_back(std::shared_ptr<GDBusConnection>(bus, deleter));
}
/**
*** DBus Chatter: org.freedesktop.login1
***
*** Fire Clock::minute_changed() signal on login1's PrepareForSleep signal
**/
static void on_login1_appeared(GDBusConnection * bus,
const gchar * name,
const gchar * name_owner,
gpointer gself)
{
auto tag = g_dbus_connection_signal_subscribe(bus,
name_owner,
"org.freedesktop.login1.Manager", // interface
"PrepareForSleep", // signal name
"/org/freedesktop/login1", // object path
nullptr, // arg0
G_DBUS_SIGNAL_FLAGS_NONE,
on_prepare_for_sleep,
gself,
nullptr);
static_cast<Impl*>(gself)->remember_subscription(name, bus, tag);
}
static void on_login1_vanished(GDBusConnection * /*system_bus*/,
const gchar * name,
gpointer gself)
{
static_cast<Impl*>(gself)->m_subscriptions[name].clear();
}
static void on_prepare_for_sleep(GDBusConnection* /*connection*/,
const gchar* /*sender_name*/,
const gchar* /*object_path*/,
const gchar* /*interface_name*/,
const gchar* /*signal_name*/,
GVariant* /*parameters*/,
gpointer gself)
{
g_debug("firing clock.minute_changed() due to PrepareForSleep");
static_cast<Impl*>(gself)->m_owner.minute_changed();
}
/**
*** DBus Chatter: com.canonical.powerd
***
*** Fire Clock::minute_changed() signal when powerd says the system's
*** has awoken from sleep -- the old timestamp is likely out-of-date
**/
static void on_powerd_appeared(GDBusConnection * bus,
const gchar * name,
const gchar * name_owner,
gpointer gself)
{
auto tag = g_dbus_connection_signal_subscribe(bus,
name_owner,
BUS_POWERD_INTERFACE,
"Wakeup", // signal name
BUS_POWERD_PATH,
nullptr, // arg0
G_DBUS_SIGNAL_FLAGS_NONE,
on_wakeup,
gself, // user_data
nullptr); // user_data closure
static_cast<Impl*>(gself)->remember_subscription(name, bus, tag);
}
static void on_powerd_vanished(GDBusConnection * /*bus*/,
const gchar * name,
gpointer gself)
{
static_cast<Impl*>(gself)->m_subscriptions[name].clear();
}
static void on_wakeup(GDBusConnection* /*connection*/,
const gchar* /*sender_name*/,
const gchar* /*object_path*/,
const gchar* /*interface_name*/,
const gchar* /*signal_name*/,
GVariant* /*parameters*/,
gpointer gself)
{
g_debug("firing clock.minute_changed() due to powerd.Wakeup");
static_cast<Impl*>(gself)->m_owner.minute_changed();
}
/***
****
***/
Clock& m_owner;
GCancellable * m_cancellable = nullptr;
std::set<guint> m_watched_names;
std::map<std::string,std::vector<std::shared_ptr<GDBusConnection>>> m_subscriptions;
};
/***
****
***/
Clock::Clock():
m_impl(new Impl{*this})
{
}
Clock::~Clock()
{
}
/***
****
***/
} // namespace datetime
} // namespace indicator
} // namespace unity
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