diff options
Diffstat (limited to 'src/timezone-timedated.cpp')
| -rw-r--r-- | src/timezone-timedated.cpp | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/src/timezone-timedated.cpp b/src/timezone-timedated.cpp new file mode 100644 index 0000000..fa99cd2 --- /dev/null +++ b/src/timezone-timedated.cpp @@ -0,0 +1,212 @@ +/* + * 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/timezone-timedated.h> + +#include <gio/gio.h> + +#include <cerrno> +#include <cstdlib> + +namespace unity { +namespace indicator { +namespace datetime { + +/*** +**** +***/ + +class TimedatedTimezone::Impl +{ +public: + + Impl(TimedatedTimezone& owner, std::string filename): + m_owner(owner), + m_filename(filename) + { + g_debug("Filename is '%s'", filename.c_str()); + monitor_timezone_property(); + } + + ~Impl() + { + clear(); + } + +private: + + void clear() + { + 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 (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); + 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); + 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; + + /* + * There is an unlikely race which happens if there is an activation + * and timezone change before our match rule is added. + */ + notify_timezone(get_timezone_from_file(m_filename)); + + /* + * Make sure the bus is around at least until we add the match rules, + * otherwise things (tests) are sad. + */ + m_connection = g_bus_get_sync(G_BUS_TYPE_SYSTEM, + nullptr, + &err); + + if (err) + { + g_warning("Couldn't get bus connection: '%s'", err->message); + g_error_free(err); + return; + } + + m_signal_subscription_id = g_dbus_connection_signal_subscribe(m_connection, + "org.freedesktop.timedate1", + "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) + { + g_debug("notify_timezone '%s'", new_timezone.c_str()); + if (!new_timezone.empty()) + m_owner.timezone.set(new_timezone); + } + + std::string get_timezone_from_file(const std::string& filename) + { + GError * error; + GIOChannel * io_channel; + std::string ret; + + // read through filename line-by-line until we fine a nonempty non-comment line + error = nullptr; + io_channel = g_io_channel_new_file(filename.c_str(), "r", &error); + if (error == nullptr) + { + auto line = g_string_new(nullptr); + + while(ret.empty()) + { + const auto io_status = g_io_channel_read_line_string(io_channel, line, nullptr, &error); + if ((io_status == G_IO_STATUS_EOF) || (io_status == G_IO_STATUS_ERROR)) + break; + if (error != nullptr) + break; + + g_strstrip(line->str); + + if (!line->len) // skip empty lines + continue; + + if (*line->str=='#') // skip comments + continue; + + ret = line->str; + } + + g_string_free(line, true); + } else + /* Default to UTC */ + ret = "Etc/Utc"; + + if (io_channel != nullptr) + { + g_io_channel_shutdown(io_channel, false, nullptr); + g_io_channel_unref(io_channel); + } + + if (error != nullptr) + { + g_warning("%s Unable to read timezone file '%s': %s", G_STRLOC, filename.c_str(), error->message); + g_error_free(error); + } + + return ret; + } + + /*** + **** + ***/ + + TimedatedTimezone & m_owner; + GDBusConnection *m_connection = nullptr; + unsigned long m_signal_subscription_id = 0; + std::string m_filename; +}; + +/*** +**** +***/ + +TimedatedTimezone::TimedatedTimezone(std::string filename): + impl(new Impl{*this, filename}) +{ +} + +TimedatedTimezone::~TimedatedTimezone() +{ +} + +/*** +**** +***/ + +} // namespace datetime +} // namespace indicator +} // namespace unity |