Add IndicatorNg

IndicatorNg is an indicator object that reads an indicator service file and
watches the bus for a corresponding service to appear. It turns the menus and
actions exported by the service into an indicator entry.

1 files changed, 444 insertions, 0 deletions

diff --git a/libindicator/indicator-ng.c b/libindicator/indicator-ng.c
new file mode 100644
index 0000000..d0d2177
--- /dev/null
+++ b/libindicator/indicator-ng.c
@@ -0,0 +1,444 @@
+
+#include "indicator-ng.h"
+
+#include <string.h>
+
+struct _IndicatorNg
+{
+  IndicatorObject parent;
+
+  gchar *service_file;
+  gchar *name;
+  gchar *object_path;
+  gchar *profile;
+  gchar *header_action;
+
+  guint name_watch_id;
+
+  GActionGroup *actions;
+  GMenuModel *menu;
+
+  GtkWidget *label;
+  GtkWidget *image;
+  GtkWidget *gtkmenu;
+  gchar *accessible_desc;
+};
+
+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 (self->gtkmenu, self->name, self->actions);
+      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;
+    }
+
+  indicator_ng_free_actions_and_menu (self);
+
+  g_clear_object (&self->service_file);
+  g_clear_object (&self->label);
+  g_clear_object (&self->image);
+  g_clear_object (&self->gtkmenu);
+
+  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->accessible_desc);
+  g_free (self->header_action);
+
+  G_OBJECT_CLASS (indicator_ng_parent_class)->finalize (object);
+}
+
+static GtkLabel *
+indicator_ng_get_label (IndicatorObject *io)
+{
+  IndicatorNg *self = INDICATOR_NG (io);
+
+  gtk_widget_show (self->label);
+
+  return GTK_LABEL (self->label);
+}
+
+static GtkImage *
+indicator_ng_get_image (IndicatorObject *io)
+{
+  IndicatorNg *self = INDICATOR_NG (io);
+
+  gtk_widget_show (self->image);
+
+  return GTK_IMAGE (self->image);
+}
+
+static GtkMenu *
+indicator_ng_get_menu (IndicatorObject *io)
+{
+  IndicatorNg *self = INDICATOR_NG (io);
+
+  return GTK_MENU (self->gtkmenu);
+}
+
+static const gchar *
+indicator_ng_get_accessible_desc (IndicatorObject *io)
+{
+  IndicatorNg *self = INDICATOR_NG (io);
+
+  return self->accessible_desc;
+}
+
+static const gchar *
+indicator_ng_get_name_hint (IndicatorObject *io)
+{
+  IndicatorNg *self = INDICATOR_NG (io);
+
+  return self->name;
+}
+
+static void
+indicator_ng_set_accessible_desc (IndicatorNg *self,
+                                  const gchar *accessible_desc)
+{
+  GList *entries;
+
+  g_free (self->accessible_desc);
+
+  self->accessible_desc = g_strdup (accessible_desc);
+
+  entries = indicator_object_get_entries (INDICATOR_OBJECT (self));
+  g_return_if_fail (entries != NULL);
+
+  g_signal_emit_by_name (self, INDICATOR_OBJECT_SIGNAL_ACCESSIBLE_DESC_UPDATE, entries->data);
+
+  g_list_free (entries);
+}
+
+static gboolean
+gtk_image_set_from_gicon_string (GtkImage    *img,
+                                 const gchar *str)
+{
+  GIcon *icon;
+  GError *error = NULL;
+
+  icon = str ? g_icon_new_for_string (str, &error) : NULL;
+  if (icon)
+    {
+      gtk_image_set_from_gicon (img, icon, GTK_ICON_SIZE_LARGE_TOOLBAR);
+      g_object_unref (icon);
+      return TRUE;
+    }
+  else
+    {
+      if (error)
+        {
+          g_warning ("invalid icon string '%s': %s", str, error->message);
+          g_error_free (error);
+        }
+      return FALSE;
+    }
+}
+
+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)")))
+    {
+      gchar *label;
+      gchar *iconstr;
+      gchar *accessible_desc;
+      gboolean visible;
+
+      g_variant_get (state, "(sssb)", &label, &iconstr, &accessible_desc, &visible);
+
+      gtk_label_set_label (GTK_LABEL (self->label), label);
+      if (!gtk_image_set_from_gicon_string (GTK_IMAGE (self->image), iconstr))
+        gtk_widget_hide (self->image);
+      indicator_ng_set_accessible_desc (self, accessible_desc);
+      indicator_object_set_visible (INDICATOR_OBJECT (self), visible);
+
+      g_free (label);
+      g_free (iconstr);
+      g_free (accessible_desc);
+    }
+  else
+    g_warning ("the action of the indicator menu item must have state with type (sssb)");
+
+  if (state)
+    g_variant_unref (state);
+}
+
+static void
+indicator_ng_menu_changed (GMenuModel *menu,
+                           gint        position,
+                           gint        removed,
+                           gint        added,
+                           gpointer    user_data)
+{
+  IndicatorNg *self = user_data;
+
+  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)
+    {
+      GMenuModel *popup;
+      gchar *action;
+
+      g_clear_pointer (&self->header_action, g_free);
+      g_menu_model_get_item_attribute (self->menu, 0, G_MENU_ATTRIBUTE_ACTION, "s", &action);
+      if (action && g_str_has_prefix (action, "indicator."))
+        self->header_action = g_strdup (action + 10);
+
+      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->gtkmenu), popup, NULL, TRUE);
+          g_object_unref (popup);
+        }
+
+      indicator_ng_update_entry (self);
+
+      g_free (action);
+    }
+}
+
+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->actions = G_ACTION_GROUP (g_dbus_action_group_get (connection, name_owner, self->object_path));
+  gtk_widget_insert_action_group (self->gtkmenu, "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_vanished (GDBusConnection *connection,
+                               const gchar     *name,
+                               gpointer         user_data)
+{
+  IndicatorNg *self = user_data;
+
+  indicator_ng_free_actions_and_menu (self);
+
+  indicator_object_set_visible (INDICATOR_OBJECT (self), FALSE);
+}
+
+static gboolean
+indicator_ng_initable_init (GInitable     *initable,
+                            GCancellable  *cancellable,
+                            GError       **error)
+{
+  IndicatorNg *self = INDICATOR_NG (initable);
+  GKeyFile *keyfile;
+  gchar *bus_name = NULL;
+
+  keyfile = g_key_file_new ();
+  if (!g_key_file_load_from_file (keyfile,
+                                  self->service_file,
+                                  G_KEY_FILE_NONE,
+                                  error))
+    {
+      g_key_file_free (keyfile);
+      return FALSE;
+    }
+
+  if ((self->name = g_key_file_get_string (keyfile, "Indicator Service", "Name", error)) &&
+      (bus_name = g_key_file_get_string (keyfile, "Indicator Service", "BusName", error)) &&
+      (self->object_path = g_key_file_get_string (keyfile, "Indicator Service", "ObjectPath", error)))
+    {
+
+      self->name_watch_id = g_bus_watch_name (G_BUS_TYPE_SESSION,
+                                              bus_name,
+                                              G_BUS_NAME_WATCHER_FLAGS_NONE,
+                                              indicator_ng_service_appeared,
+                                              indicator_ng_service_vanished,
+                                              self, NULL);
+    }
+
+  g_free (bus_name);
+  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_label = indicator_ng_get_label;
+  io_class->get_image = indicator_ng_get_image;
+  io_class->get_menu = indicator_ng_get_menu;
+  io_class->get_accessible_desc = indicator_ng_get_accessible_desc;
+  io_class->get_name_hint = indicator_ng_get_name_hint;
+
+  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->label = g_object_ref_sink (gtk_label_new (NULL));
+  self->image = g_object_ref_sink (gtk_image_new ());
+  self->gtkmenu = g_object_ref_sink (gtk_menu_new ());
+
+  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);
+}