diff options
Diffstat (limited to 'libindicator/indicator-ng.c')
-rw-r--r-- | libindicator/indicator-ng.c | 566 |
1 files changed, 566 insertions, 0 deletions
diff --git a/libindicator/indicator-ng.c b/libindicator/indicator-ng.c new file mode 100644 index 0000000..f2b957b --- /dev/null +++ b/libindicator/indicator-ng.c @@ -0,0 +1,566 @@ +/* + * 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: + * Lars Uebernickel <lars.uebernickel@canonical.com> + */ + +#include "indicator-ng.h" +#include "indicator-image-helper.h" + +#include <string.h> + +struct _IndicatorNg +{ + IndicatorObject parent; + + gchar *service_file; + gchar *name; + gchar *object_path; + gchar *bus_name; + gchar *profile; + gchar *header_action; + + guint name_watch_id; + + GDBusConnection *session_bus; + GActionGroup *actions; + GMenuModel *menu; + + IndicatorObjectEntry entry; + gchar *accessible_desc; + + gint64 last_service_restart; +}; + +static void indicator_ng_initable_iface_init (GInitableIface *initable); +G_DEFINE_TYPE_WITH_CODE (IndicatorNg, indicator_ng, INDICATOR_OBJECT_TYPE, + G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, indicator_ng_initable_iface_init)) + +enum +{ + PROP_0, + PROP_SERVICE_FILE, + PROP_PROFILE, + N_PROPERTIES +}; + +static GParamSpec *properties[N_PROPERTIES]; + +static void +indicator_ng_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + IndicatorNg *self = INDICATOR_NG (object); + + switch (property_id) + { + case PROP_SERVICE_FILE: + g_value_set_string (value, self->service_file); + break; + + case PROP_PROFILE: + g_value_set_string (value, self->profile); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + } +} + +static void +indicator_ng_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + IndicatorNg *self = INDICATOR_NG (object); + + switch (property_id) + { + case PROP_SERVICE_FILE: /* construct-only */ + self->service_file = g_strdup (g_value_get_string (value)); + break; + + case PROP_PROFILE: /* construct-only */ + self->profile = g_strdup (g_value_get_string (value)); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + } +} + +static void +indicator_ng_free_actions_and_menu (IndicatorNg *self) +{ + if (self->actions) + { + gtk_widget_insert_action_group (GTK_WIDGET (self->entry.menu), "indicator", NULL); + g_signal_handlers_disconnect_by_data (self->actions, self); + g_clear_object (&self->actions); + } + + if (self->menu) + { + g_signal_handlers_disconnect_by_data (self->menu, self); + g_clear_object (&self->menu); + } +} + +static void +indicator_ng_dispose (GObject *object) +{ + IndicatorNg *self = INDICATOR_NG (object); + + if (self->name_watch_id) + { + g_bus_unwatch_name (self->name_watch_id); + self->name_watch_id = 0; + } + + g_clear_object (&self->session_bus); + + indicator_ng_free_actions_and_menu (self); + + g_clear_object (&self->entry.label); + g_clear_object (&self->entry.image); + g_clear_object (&self->entry.menu); + + G_OBJECT_CLASS (indicator_ng_parent_class)->dispose (object); +} + +static void +indicator_ng_finalize (GObject *object) +{ + IndicatorNg *self = INDICATOR_NG (object); + + g_free (self->service_file); + g_free (self->name); + g_free (self->object_path); + g_free (self->bus_name); + g_free (self->accessible_desc); + g_free (self->header_action); + + G_OBJECT_CLASS (indicator_ng_parent_class)->finalize (object); +} + +static GList * +indicator_ng_get_entries (IndicatorObject *io) +{ + IndicatorNg *self = INDICATOR_NG (io); + + return g_list_append (NULL, &self->entry); +} + +static void +indicator_ng_set_accessible_desc (IndicatorNg *self, + const gchar *accessible_desc) +{ + g_free (self->accessible_desc); + self->accessible_desc = g_strdup (accessible_desc); + + self->entry.accessible_desc = self->accessible_desc; + g_signal_emit_by_name (self, INDICATOR_OBJECT_SIGNAL_ACCESSIBLE_DESC_UPDATE, &self->entry); +} + +static void +indicator_ng_set_icon_from_string (IndicatorNg *self, + const gchar *str) +{ + GIcon *icon; + GError *error = NULL; + + if (str == NULL || *str == '\0') + { + if (self->entry.image) + { + gtk_image_clear (self->entry.image); + gtk_widget_hide (GTK_WIDGET (self->entry.image)); + } + return; + } + + if (!self->entry.image) + self->entry.image = g_object_ref_sink (gtk_image_new ()); + + gtk_widget_show (GTK_WIDGET (self->entry.image)); + + icon = g_icon_new_for_string (str, &error); + if (icon) + { + indicator_image_helper_update_from_gicon (self->entry.image, icon); + g_object_unref (icon); + } + else + { + g_warning ("invalid icon string '%s': %s", str, error->message); + gtk_image_set_from_stock (self->entry.image, GTK_STOCK_MISSING_IMAGE, GTK_ICON_SIZE_LARGE_TOOLBAR); + g_error_free (error); + } +} + +static void +indicator_ng_set_label (IndicatorNg *self, + const gchar *label) +{ + if (label == NULL || *label == '\0') + { + if (self->entry.label) + gtk_widget_hide (GTK_WIDGET (self->entry.label)); + return; + } + + if (!self->entry.label) + self->entry.label = g_object_ref_sink (gtk_label_new (NULL)); + + gtk_label_set_label (GTK_LABEL (self->entry.label), label); + gtk_widget_show (GTK_WIDGET (self->entry.label)); +} + +static void +indicator_ng_update_entry (IndicatorNg *self) +{ + GVariant *state; + + g_return_if_fail (self->menu != NULL); + g_return_if_fail (self->actions != NULL); + + if (!self->header_action || + !g_action_group_has_action (self->actions, self->header_action)) + { + indicator_object_set_visible (INDICATOR_OBJECT (self), FALSE); + return; + } + + state = g_action_group_get_action_state (self->actions, self->header_action); + if (state && g_variant_is_of_type (state, G_VARIANT_TYPE ("(sssb)"))) + { + const gchar *label; + const gchar *iconstr; + const gchar *accessible_desc; + gboolean visible; + + g_variant_get (state, "(&s&s&sb)", &label, &iconstr, &accessible_desc, &visible); + + indicator_ng_set_label (self, label); + indicator_ng_set_icon_from_string (self, iconstr); + indicator_ng_set_accessible_desc (self, accessible_desc); + indicator_object_set_visible (INDICATOR_OBJECT (self), visible); + } + else + g_warning ("the action of the indicator menu item must have state with type (sssb)"); + + if (state) + g_variant_unref (state); +} + +static gboolean +indicator_ng_menu_item_is_of_type (GMenuModel *menu, + gint index, + const gchar *expected_type) +{ + gchar *type; + gboolean has_type = FALSE; + + if (g_menu_model_get_item_attribute (menu, index, "x-canonical-type", "s", &type)) + { + has_type = g_str_equal (type, expected_type); + g_free (type); + } + + return has_type; +} + +static void +indicator_ng_menu_changed (GMenuModel *menu, + gint position, + gint removed, + gint added, + gpointer user_data) +{ + IndicatorNg *self = user_data; + + /* The menu may only contain one item (the indicator title menu). + * Thus, the position is always 0, and there is either exactly one + * item added or exactly one item removed. + */ + g_return_if_fail (position == 0); + g_return_if_fail (added < 2 && removed < 2 && added ^ removed); + + if (removed) + indicator_object_set_visible (INDICATOR_OBJECT (self), FALSE); + + if (added) + { + g_clear_pointer (&self->header_action, g_free); + + if (indicator_ng_menu_item_is_of_type (self->menu, 0, "com.canonical.indicator.root")) + { + GMenuModel *popup; + gchar *action; + + if (g_menu_model_get_item_attribute (self->menu, 0, G_MENU_ATTRIBUTE_ACTION, "s", &action) && + g_str_has_prefix (action, "indicator.")) + { + self->header_action = g_strdup (action + strlen ("indicator.")); + } + + popup = g_menu_model_get_item_link (self->menu, 0, G_MENU_LINK_SUBMENU); + if (popup) + { + gtk_menu_shell_bind_model (GTK_MENU_SHELL (self->entry.menu), popup, NULL, TRUE); + g_object_unref (popup); + } + + indicator_ng_update_entry (self); + + g_free (action); + } + else + g_warning ("indicator menu item must be of type 'com.canonical.indicator.root'"); + } +} + +static void +indicator_ng_service_appeared (GDBusConnection *connection, + const gchar *name, + const gchar *name_owner, + gpointer user_data) +{ + IndicatorNg *self = user_data; + gchar *menu_object_path; + + g_assert (!self->actions); + g_assert (!self->menu); + + self->session_bus = g_object_ref (connection); + + self->actions = G_ACTION_GROUP (g_dbus_action_group_get (connection, name_owner, self->object_path)); + gtk_widget_insert_action_group (GTK_WIDGET (self->entry.menu), "indicator", self->actions); + g_signal_connect_swapped (self->actions, "action-added", G_CALLBACK (indicator_ng_update_entry), self); + g_signal_connect_swapped (self->actions, "action-removed", G_CALLBACK (indicator_ng_update_entry), self); + g_signal_connect_swapped (self->actions, "action-state-changed", G_CALLBACK (indicator_ng_update_entry), self); + + menu_object_path = g_strconcat (self->object_path, "/", self->profile, NULL); + self->menu = G_MENU_MODEL (g_dbus_menu_model_get (connection, name_owner, menu_object_path)); + g_signal_connect (self->menu, "items-changed", G_CALLBACK (indicator_ng_menu_changed), self); + if (g_menu_model_get_n_items (self->menu)) + indicator_ng_menu_changed (self->menu, 0, 0, 1, self); + + indicator_ng_update_entry (self); + + g_free (menu_object_path); +} + +static void +indicator_ng_service_started (GObject *source_object, + GAsyncResult *result, + gpointer user_data) +{ + IndicatorNg *self = user_data; + GError *error = NULL; + GVariant *reply; + + reply = g_dbus_connection_call_finish (G_DBUS_CONNECTION (source_object), result, &error); + if (!reply) + { + g_warning ("Could not activate service '%s': %s", self->name, error->message); + indicator_object_set_visible (INDICATOR_OBJECT (self), FALSE); + g_error_free (error); + return; + } + + switch (g_variant_get_uint32 (reply)) + { + case 1: /* DBUS_START_REPLY_SUCCESS */ + break; + + case 2: /* DBUS_START_REPLY_ALREADY_RUNNING */ + g_warning ("could not start service '%s': it is already running", self->name); + break; + + default: + g_assert_not_reached (); + } + + g_variant_unref (reply); +} + +static void +indicator_ng_service_vanished (GDBusConnection *connection, + const gchar *name, + gpointer user_data) +{ + IndicatorNg *self = user_data; + + indicator_ng_free_actions_and_menu (self); + + /* Names may vanish because the service decided it doesn't need to + * show its indicator anymore, or because it crashed. Let's assume it + * crashes and restart it unless it explicitly hid its indicator. */ + + if (indicator_object_entry_is_visible (INDICATOR_OBJECT (self), &self->entry)) + { + gint64 now; + + /* take care not to start it if it repeatedly crashes */ + now = g_get_monotonic_time (); + if (now - self->last_service_restart < 1 * G_USEC_PER_SEC) + return; + + self->last_service_restart = now; + + g_dbus_connection_call (self->session_bus, + "org.freedesktop.DBus", + "/", + "org.freedesktop.DBus", + "StartServiceByName", + g_variant_new ("(su)", self->bus_name, 0), + G_VARIANT_TYPE ("(u)"), + G_DBUS_CALL_FLAGS_NONE, + -1, + NULL, + indicator_ng_service_started, + self); + } +} + +static gboolean +indicator_ng_initable_init (GInitable *initable, + GCancellable *cancellable, + GError **error) +{ + IndicatorNg *self = INDICATOR_NG (initable); + GKeyFile *keyfile; + + keyfile = g_key_file_new (); + if (!g_key_file_load_from_file (keyfile, self->service_file, G_KEY_FILE_NONE, error)) + goto out; + + if (!(self->name = g_key_file_get_string (keyfile, "Indicator Service", "Name", error))) + goto out; + + self->entry.name_hint = self->name; + + if (!(self->bus_name = g_key_file_get_string (keyfile, "Indicator Service", "BusName", error))) + goto out; + + if (!(self->object_path = g_key_file_get_string (keyfile, "Indicator Service", "ObjectPath", error))) + goto out; + + self->name_watch_id = g_bus_watch_name (G_BUS_TYPE_SESSION, + self->bus_name, + G_BUS_NAME_WATCHER_FLAGS_AUTO_START, + indicator_ng_service_appeared, + indicator_ng_service_vanished, + self, NULL); + +out: + g_key_file_free (keyfile); + + return self->name_watch_id > 0; +} + +static void +indicator_ng_class_init (IndicatorNgClass *class) +{ + GObjectClass *object_class = G_OBJECT_CLASS (class); + IndicatorObjectClass *io_class = INDICATOR_OBJECT_CLASS (class); + + object_class->get_property = indicator_ng_get_property; + object_class->set_property = indicator_ng_set_property; + object_class->dispose = indicator_ng_dispose; + object_class->finalize = indicator_ng_finalize; + + io_class->get_entries = indicator_ng_get_entries; + + properties[PROP_SERVICE_FILE] = g_param_spec_string ("service-file", + "Service file", + "Path of the service file", + NULL, + G_PARAM_READWRITE | + G_PARAM_CONSTRUCT_ONLY | + G_PARAM_STATIC_STRINGS); + + properties[PROP_PROFILE] = g_param_spec_string ("profile", + "Profile", + "Indicator profile", + "desktop", + G_PARAM_READWRITE | + G_PARAM_CONSTRUCT_ONLY | + G_PARAM_STATIC_STRINGS); + + g_object_class_install_properties(object_class, N_PROPERTIES, properties); +} + +static void +indicator_ng_initable_iface_init (GInitableIface *initable) +{ + initable->init = indicator_ng_initable_init; +} + +static void +indicator_ng_init (IndicatorNg *self) +{ + self->entry.menu = g_object_ref_sink (gtk_menu_new ()); + + /* work around IndicatorObject's warning that the accessible + * description is missing. We never set it on construction, but when + * the menu model has arrived on the bus. + */ + self->accessible_desc = g_strdup (""); + self->entry.accessible_desc = self->accessible_desc; + + indicator_object_set_visible (INDICATOR_OBJECT (self), FALSE); +} + +IndicatorNg * +indicator_ng_new (const gchar *service_file, + GError **error) +{ + return g_initable_new (INDICATOR_TYPE_NG, NULL, error, + "service-file", service_file, + NULL); +} + +IndicatorNg * +indicator_ng_new_for_profile (const gchar *service_file, + const gchar *profile, + GError **error) +{ + return g_initable_new (INDICATOR_TYPE_NG, NULL, error, + "service-file", service_file, + "profile", profile, + NULL); +} + +const gchar * +indicator_ng_get_service_file (IndicatorNg *self) +{ + g_return_val_if_fail (INDICATOR_IS_NG (self), NULL); + + return self->service_file; +} + +const gchar * +indicator_ng_get_profile (IndicatorNg *self) +{ + g_return_val_if_fail (INDICATOR_IS_NG (self), NULL); + + return self->profile; +} |