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Diffstat (limited to 'src/notifier.c')
| -rw-r--r-- | src/notifier.c | 445 |
1 files changed, 445 insertions, 0 deletions
diff --git a/src/notifier.c b/src/notifier.c new file mode 100644 index 0000000..81cd6f1 --- /dev/null +++ b/src/notifier.c @@ -0,0 +1,445 @@ +/* + * Copyright 2014 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 "dbus-battery.h" +#include "dbus-shared.h" +#include "notifier.h" + +#include <libnotify/notify.h> + +#include <glib/gi18n.h> + +#define HINT_INTERACTIVE "x-canonical-switch-to-application" + +typedef enum +{ + POWER_LEVEL_CRITICAL, + POWER_LEVEL_VERY_LOW, + POWER_LEVEL_LOW, + POWER_LEVEL_OK +} +PowerLevel; + +/** +*** GObject Properties +**/ + +enum +{ + PROP_0, + PROP_BATTERY, + LAST_PROP +}; + +#define PROP_BATTERY_NAME "battery" + +static GParamSpec * properties[LAST_PROP]; + +static int instance_count = 0; + +/** +*** +**/ + +typedef struct +{ + /* The battery we're currently watching. + This may be a physical battery or it may be an aggregated + battery from multiple batteries present on the device. + See indicator_power_service_choose_primary_device() and + bug #880881 */ + IndicatorPowerDevice * battery; + PowerLevel power_level; + gboolean discharging; + + NotifyNotification * notify_notification; + + GDBusConnection * bus; + DbusBattery * dbus_battery; /* com.canonical.indicator.power.Battery skeleton */ +} +IndicatorPowerNotifierPrivate; + +typedef IndicatorPowerNotifierPrivate priv_t; + +G_DEFINE_TYPE_WITH_PRIVATE(IndicatorPowerNotifier, + indicator_power_notifier, + G_TYPE_OBJECT) + +#define get_priv(o) ((priv_t*)indicator_power_notifier_get_instance_private(o)) + +/*** +**** +***/ + +static const char * +power_level_to_dbus_string (const PowerLevel power_level) +{ + switch (power_level) + { + case POWER_LEVEL_LOW: return POWER_LEVEL_STR_LOW; + case POWER_LEVEL_VERY_LOW: return POWER_LEVEL_STR_VERY_LOW; + case POWER_LEVEL_CRITICAL: return POWER_LEVEL_STR_CRITICAL; + default: return POWER_LEVEL_STR_OK; + } +} + +PowerLevel +get_battery_power_level (IndicatorPowerDevice * battery) +{ + static const double percent_critical = 2.0; + static const double percent_very_low = 5.0; + static const double percent_low = 10.0; + gdouble p; + PowerLevel ret; + + g_return_val_if_fail(battery != NULL, POWER_LEVEL_OK); + g_return_val_if_fail(indicator_power_device_get_kind(battery) == UP_DEVICE_KIND_BATTERY, POWER_LEVEL_OK); + + p = indicator_power_device_get_percentage(battery); + + if (p <= percent_critical) + ret = POWER_LEVEL_CRITICAL; + else if (p <= percent_very_low) + ret = POWER_LEVEL_VERY_LOW; + else if (p <= percent_low) + ret = POWER_LEVEL_LOW; + else + ret = POWER_LEVEL_OK; + + return ret; +} + +/*** +**** Notifications +***/ + +static void +on_notify_notification_finalized (gpointer gself, GObject * dead) +{ + IndicatorPowerNotifier * const self = INDICATOR_POWER_NOTIFIER(gself); + priv_t * const p = get_priv(self); + g_return_if_fail ((void*)(p->notify_notification) == (void*)dead); + p->notify_notification = NULL; + dbus_battery_set_is_warning (p->dbus_battery, FALSE); +} + +static void +notification_clear (IndicatorPowerNotifier * self) +{ + priv_t * const p = get_priv(self); + NotifyNotification * nn; + + if ((nn = p->notify_notification)) + { + GError * error = NULL; + + g_object_weak_unref(G_OBJECT(nn), on_notify_notification_finalized, self); + + if (!notify_notification_close(nn, &error)) + { + g_warning("Unable to close notification: %s", error->message); + g_error_free(error); + } + + p->notify_notification = NULL; + dbus_battery_set_is_warning (p->dbus_battery, FALSE); + } +} + +static void +notification_show(IndicatorPowerNotifier * self) +{ + priv_t * const p = get_priv(self); + gdouble pct; + char * body; + NotifyNotification * nn; + GError * error; + + notification_clear(self); + + /* create the notification */ + pct = indicator_power_device_get_percentage(p->battery); + body = g_strdup_printf(_("%.0f%% charge remaining"), pct); + nn = notify_notification_new(_("Battery Low"), body, NULL); + g_free (body); + /*notify_notification_set_hint(nn, HINT_INTERACTIVE, g_variant_new_boolean(TRUE));*/ + + /* if we can show it, keep it */ + error = NULL; + if (notify_notification_show(nn, &error)) + { + p->notify_notification = nn; + g_signal_connect(nn, "closed", G_CALLBACK(g_object_unref), NULL); + g_object_weak_ref(G_OBJECT(nn), on_notify_notification_finalized, self); + dbus_battery_set_is_warning (p->dbus_battery, TRUE); + } + else + { + g_critical("Unable to show snap decision for '%s': %s", body, error->message); + g_error_free(error); + g_object_unref(nn); + } +} + +/*** +**** +***/ + +static void +on_battery_property_changed (IndicatorPowerNotifier * self) +{ + priv_t * p; + PowerLevel old_power_level; + PowerLevel new_power_level; + gboolean old_discharging; + gboolean new_discharging; + + g_return_if_fail(INDICATOR_IS_POWER_NOTIFIER(self)); + p = get_priv (self); + g_return_if_fail(INDICATOR_IS_POWER_DEVICE(p->battery)); + + old_power_level = p->power_level; + new_power_level = get_battery_power_level (p->battery); + + old_discharging = p->discharging; + new_discharging = indicator_power_device_get_state(p->battery) == UP_DEVICE_STATE_DISCHARGING; + + /* pop up a 'low battery' notification if either: + a) it's already discharging, and its PowerLevel worsens, OR + b) it's already got a bad PowerLevel and its state becomes 'discharging */ + if ((new_discharging && (old_power_level > new_power_level)) || + ((new_power_level != POWER_LEVEL_OK) && new_discharging && !old_discharging)) + { + notification_show (self); + } + else if (!new_discharging || (new_power_level == POWER_LEVEL_OK)) + { + notification_clear (self); + } + + dbus_battery_set_power_level (p->dbus_battery, power_level_to_dbus_string (new_power_level)); + p->power_level = new_power_level; + p->discharging = new_discharging; +} + +/*** +**** GObject virtual functions +***/ + +static void +my_get_property (GObject * o, + guint property_id, + GValue * value, + GParamSpec * pspec) +{ + IndicatorPowerNotifier * const self = INDICATOR_POWER_NOTIFIER (o); + priv_t * const p = get_priv (self); + + switch (property_id) + { + case PROP_BATTERY: + g_value_set_object (value, p->battery); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (o, property_id, pspec); + } +} + +static void +my_set_property (GObject * o, + guint property_id, + const GValue * value, + GParamSpec * pspec) +{ + IndicatorPowerNotifier * const self = INDICATOR_POWER_NOTIFIER (o); + + switch (property_id) + { + case PROP_BATTERY: + indicator_power_notifier_set_battery (self, g_value_get_object(value)); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (o, property_id, pspec); + } +} + +static void +my_dispose (GObject * o) +{ + IndicatorPowerNotifier * const self = INDICATOR_POWER_NOTIFIER(o); + priv_t * const p = get_priv (self); + + indicator_power_notifier_set_bus (self, NULL); + notification_clear (self); + indicator_power_notifier_set_battery (self, NULL); + g_clear_object (&p->dbus_battery); + + G_OBJECT_CLASS (indicator_power_notifier_parent_class)->dispose (o); +} + +static void +my_finalize (GObject * o G_GNUC_UNUSED) +{ + /* FIXME: This is an awkward place to put this. + Ordinarily something like this would go in main(), but we need libnotify + to clean itself up before shutting down the bus in the unit tests as well. */ + if (!--instance_count) + notify_uninit(); +} + +/*** +**** Instantiation +***/ + +static void +indicator_power_notifier_init (IndicatorPowerNotifier * self) +{ + priv_t * const p = get_priv (self); + + /* bind the read-only properties so they'll get pushed to the bus */ + + p->dbus_battery = dbus_battery_skeleton_new (); + + p->power_level = POWER_LEVEL_OK; + + if (!instance_count++) + { + if (!notify_init("indicator-power-service")) + { + g_critical("Unable to initialize libnotify! Notifications might not be shown."); + } + } +} + +static void +indicator_power_notifier_class_init (IndicatorPowerNotifierClass * klass) +{ + GObjectClass * object_class = G_OBJECT_CLASS (klass); + + object_class->dispose = my_dispose; + object_class->finalize = my_finalize; + object_class->get_property = my_get_property; + object_class->set_property = my_set_property; + + properties[PROP_BATTERY] = g_param_spec_object ( + PROP_BATTERY_NAME, + "Battery", + "The current battery", + G_TYPE_OBJECT, + G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS); + + g_object_class_install_properties (object_class, LAST_PROP, properties); +} + +/*** +**** Public API +***/ + +IndicatorPowerNotifier * +indicator_power_notifier_new (void) +{ + GObject * o = g_object_new (INDICATOR_TYPE_POWER_NOTIFIER, NULL); + + return INDICATOR_POWER_NOTIFIER (o); +} + +void +indicator_power_notifier_set_battery (IndicatorPowerNotifier * self, + IndicatorPowerDevice * battery) +{ + priv_t * p; + + g_return_if_fail(INDICATOR_IS_POWER_NOTIFIER(self)); + g_return_if_fail((battery == NULL) || INDICATOR_IS_POWER_DEVICE(battery)); + g_return_if_fail((battery == NULL) || (indicator_power_device_get_kind(battery) == UP_DEVICE_KIND_BATTERY)); + + p = get_priv (self); + + if (p->battery == battery) + return; + + if (p->battery != NULL) + { + g_signal_handlers_disconnect_by_data (p->battery, self); + g_clear_object (&p->battery); + dbus_battery_set_power_level (p->dbus_battery, power_level_to_dbus_string (POWER_LEVEL_OK)); + notification_clear (self); + } + + if (battery != NULL) + { + p->battery = g_object_ref (battery); + g_signal_connect_swapped (p->battery, "notify::"INDICATOR_POWER_DEVICE_PERCENTAGE, + G_CALLBACK(on_battery_property_changed), self); + g_signal_connect_swapped (p->battery, "notify::"INDICATOR_POWER_DEVICE_STATE, + G_CALLBACK(on_battery_property_changed), self); + on_battery_property_changed (self); + } +} + +void +indicator_power_notifier_set_bus (IndicatorPowerNotifier * self, + GDBusConnection * bus) +{ + priv_t * p; + GDBusInterfaceSkeleton * skel; + + g_return_if_fail(INDICATOR_IS_POWER_NOTIFIER(self)); + g_return_if_fail((bus == NULL) || G_IS_DBUS_CONNECTION(bus)); + + p = get_priv (self); + + if (p->bus == bus) + return; + + skel = G_DBUS_INTERFACE_SKELETON(p->dbus_battery); + + if (p->bus != NULL) + { + if (skel != NULL) + g_dbus_interface_skeleton_unexport (skel); + + g_clear_object (&p->bus); + } + + if (bus != NULL) + { + GError * error; + + p->bus = g_object_ref (bus); + + error = NULL; + if (!g_dbus_interface_skeleton_export(skel, + bus, + BUS_PATH"/Battery", + &error)) + { + g_warning ("Unable to export LowBattery properties: %s", error->message); + g_error_free (error); + } + } +} + +const char * +indicator_power_notifier_get_power_level (IndicatorPowerDevice * battery) +{ + return power_level_to_dbus_string (get_battery_power_level (battery)); +} |