Only show chat section when necessary

The chat section is only shown when an application that is registered to use it
is running.  Applications are registered if their desktop file contains:

  X-MessagingMenu-UsesChatStatus: true

1 files changed, 74 insertions, 0 deletions

diff --git a/src/app-section.c b/src/app-section.c
index e7a2e1d..fb3d8f9 100644
--- a/src/app-section.c
+++ b/src/app-section.c
@@ -46,6 +46,7 @@ struct _AppSectionPrivate
 	GActionGroup *actions;
 
 	gboolean draws_attention;
+	gboolean uses_chat_status;
 
 	guint name_watch_id;
 };
@@ -55,6 +56,7 @@ enum {
 	PROP_APPINFO,
 	PROP_ACTIONS,
 	PROP_DRAWS_ATTENTION,
+	PROP_USES_CHAT_STATUS,
 	NUM_PROPERTIES
 };
 
@@ -123,6 +125,12 @@ app_section_class_init (AppSectionClass *klass)
 								 FALSE,
 								 G_PARAM_READABLE);
 
+	properties[PROP_USES_CHAT_STATUS] = g_param_spec_boolean ("uses-chat-status",
+								  "Uses chat status",
+								  "Whether the section uses the global chat status",
+								  FALSE,
+								  G_PARAM_READABLE);
+
 	g_object_class_install_properties (object_class, NUM_PROPERTIES, properties);
 }
 
@@ -165,6 +173,10 @@ app_section_get_property (GObject    *object,
 		g_value_set_boolean (value, app_section_get_draws_attention (self));
 		break;
 
+	case PROP_USES_CHAT_STATUS:
+		g_value_set_boolean (value, app_section_get_uses_chat_status (self));
+		break;
+
 	default:
 		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
 	}
@@ -245,11 +257,58 @@ nick_activate_cb (GSimpleAction *action,
 }
 
 static void
+keyfile_loaded (GObject *source_object,
+		GAsyncResult *result,
+		 gpointer user_data)
+{
+	AppSection *self = user_data;
+	gchar *contents;
+	gsize length;
+	GKeyFile *keyfile;
+	GError *error = NULL;
+
+	if (!g_file_load_contents_finish (G_FILE (source_object), result,
+					 &contents, &length, NULL, &error)) {
+		g_warning ("could not read key file: %s", error->message);
+		g_error_free (error);
+		return;
+	}
+
+	keyfile = g_key_file_new ();
+	if (!g_key_file_load_from_data (keyfile, contents, length, 0, &error)) {
+		g_warning ("could not read key file: %s", error->message);
+		g_error_free (error);
+		goto out;
+	}
+
+	self->priv->uses_chat_status = g_key_file_get_boolean (keyfile,
+							       G_KEY_FILE_DESKTOP_GROUP,
+							       "X-MessagingMenu-UsesChatStatus",
+							       &error);
+	if (error) {
+		if (error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND) {
+			g_warning ("could not read X-MessagingMenu-UsesChatSection: %s",
+				   error->message);
+		}
+		g_error_free (error);
+		goto out;
+	}
+
+	if (self->priv->uses_chat_status)
+		g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_USES_CHAT_STATUS]);
+
+out:
+	g_key_file_free (keyfile);
+	g_free (contents);
+}
+
+static void
 app_section_set_app_info (AppSection *self,
 			  GDesktopAppInfo *appinfo)
 {
 	AppSectionPrivate *priv = self->priv;
 	GSimpleAction *launch;
+	GFile *keyfile;
 
 	g_return_if_fail (priv->appinfo == NULL);
 
@@ -288,6 +347,10 @@ app_section_set_app_info (AppSection *self,
 		g_free(name);
 	}
 
+	keyfile = g_file_new_for_path (g_desktop_app_info_get_filename (priv->appinfo));
+	g_file_load_contents_async (keyfile, NULL, keyfile_loaded, self);
+	g_object_unref (keyfile);
+
 	g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_APPINFO]);
 	g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_ACTIONS]);
 
@@ -466,6 +529,7 @@ app_section_set_object_path (AppSection *self,
 
 	g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_ACTIONS]);
 	g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_DRAWS_ATTENTION]);
+	g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_USES_CHAT_STATUS]);
 	g_object_thaw_notify (G_OBJECT (self));
 }
 
@@ -507,6 +571,7 @@ app_section_unset_object_path (AppSection *self)
 
 	g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_ACTIONS]);
 	g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_DRAWS_ATTENTION]);
+	g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_USES_CHAT_STATUS]);
 }
 
 static gboolean
@@ -594,3 +659,12 @@ action_removed (GActionGroup *group,
 
 	g_variant_unref (state);
 }
+
+gboolean
+app_section_get_uses_chat_status (AppSection *self)
+{
+	AppSectionPrivate * priv = self->priv;
+
+	/* chat status is only useful when the app is running */
+	return priv->uses_chat_status && priv->actions;
+}