protected function setup_actions() {

		// Template Output.
		add_filter( 'bp_get_activity_action_pre_meta', array( $this, 'secondary_avatars' ), 10, 2 );

		// Filter BuddyPress template hierarchy and look for page templates.
		add_filter( 'bp_get_buddypress_template', array( $this, 'theme_compat_page_templates' ), 10, 1 );

		/** Scripts ***********************************************************/

		add_action( 'bp_enqueue_scripts', array( $this, 'enqueue_styles'   ) ); // Enqueue theme CSS
		add_action( 'bp_enqueue_scripts', array( $this, 'enqueue_scripts'  ) ); // Enqueue theme JS
		add_filter( 'bp_enqueue_scripts', array( $this, 'localize_scripts' ) ); // Enqueue theme script localization

		/** Body no-js Class **************************************************/

		add_filter( 'body_class', array( $this, 'add_nojs_body_class' ), 20, 1 );

		/** Buttons ***********************************************************/

		if ( ! is_admin() || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) ) {
			// Register buttons for the relevant component templates
			// Friends button.
			if ( bp_is_active( 'friends' ) )
				add_action( 'bp_member_header_actions',    'bp_add_friend_button',           5 );

			// Activity button.
			if ( bp_is_active( 'activity' ) && bp_activity_do_mentions() )
				add_action( 'bp_member_header_actions',    'bp_send_public_message_button',  20 );

			// Messages button.
			if ( bp_is_active( 'messages' ) )
				add_action( 'bp_member_header_actions',    'bp_send_private_message_button', 20 );

			// Group buttons.
			if ( bp_is_active( 'groups' ) ) {
				add_action( 'bp_group_header_actions',          'bp_group_join_button',               5           );
				add_action( 'bp_directory_groups_actions',      'bp_group_join_button'                            );
				add_action( 'bp_groups_directory_group_filter', 'bp_legacy_theme_group_create_nav', 999           );
				add_action( 'bp_after_group_admin_content',     'bp_legacy_groups_admin_screen_hidden_input'      );
				add_action( 'bp_before_group_admin_form',       'bp_legacy_theme_group_manage_members_add_search' );
			}

			// Blog button.
			if ( bp_is_active( 'blogs' ) ) {
				add_action( 'bp_directory_blogs_actions',    'bp_blogs_visit_blog_button'           );
				add_action( 'bp_blogs_directory_blog_types', 'bp_legacy_theme_blog_create_nav', 999 );
			}
		}

		/** Notices ***********************************************************/

		// Only hook the 'sitewide_notices' overlay if the Sitewide
		// Notices widget is not in use (to avoid duplicate content).
		if ( bp_is_active( 'messages' ) && ! is_active_widget( false, false, 'bp_messages_sitewide_notices_widget', true ) ) {
			add_action( 'wp_footer', array( $this, 'sitewide_notices' ), 9999 );
		}

		/** Ajax **************************************************************/

		$actions = array(

			// Directory filters.
			'blogs_filter'    => 'bp_legacy_theme_object_template_loader',
			'forums_filter'   => 'bp_legacy_theme_object_template_loader',
			'groups_filter'   => 'bp_legacy_theme_object_template_loader',
			'members_filter'  => 'bp_legacy_theme_object_template_loader',
			'messages_filter' => 'bp_legacy_theme_messages_template_loader',
			'invite_filter'   => 'bp_legacy_theme_invite_template_loader',
			'requests_filter' => 'bp_legacy_theme_requests_template_loader',

			// Friends.
			'accept_friendship' => 'bp_legacy_theme_ajax_accept_friendship',
			'addremove_friend'  => 'bp_legacy_theme_ajax_addremove_friend',
			'reject_friendship' => 'bp_legacy_theme_ajax_reject_friendship',

			// Activity.
			'activity_get_older_updates'  => 'bp_legacy_theme_activity_template_loader',
			'activity_mark_fav'           => 'bp_legacy_theme_mark_activity_favorite',
			'activity_mark_unfav'         => 'bp_legacy_theme_unmark_activity_favorite',
			'activity_widget_filter'      => 'bp_legacy_theme_activity_template_loader',
			'delete_activity'             => 'bp_legacy_theme_delete_activity',
			'delete_activity_comment'     => 'bp_legacy_theme_delete_activity_comment',
			'get_single_activity_content' => 'bp_legacy_theme_get_single_activity_content',
			'new_activity_comment'        => 'bp_legacy_theme_new_activity_comment',
			'post_update'                 => 'bp_legacy_theme_post_update',
			'bp_spam_activity'            => 'bp_legacy_theme_spam_activity',
			'bp_spam_activity_comment'    => 'bp_legacy_theme_spam_activity',

			// Groups.
			'groups_invite_user' => 'bp_legacy_theme_ajax_invite_user',
			'joinleave_group'    => 'bp_legacy_theme_ajax_joinleave_group',

			// Messages.
			'messages_autocomplete_results' => 'bp_legacy_theme_ajax_messages_autocomplete_results',
			'messages_close_notice'         => 'bp_legacy_theme_ajax_close_notice',
			'messages_delete'               => 'bp_legacy_theme_ajax_messages_delete',
			'messages_markread'             => 'bp_legacy_theme_ajax_message_markread',
			'messages_markunread'           => 'bp_legacy_theme_ajax_message_markunread',
			'messages_send_reply'           => 'bp_legacy_theme_ajax_messages_send_reply',
		);

		// Conditional actions.
		if ( bp_is_active( 'messages', 'star' ) ) {
			$actions['messages_star'] = 'bp_legacy_theme_ajax_messages_star_handler';
		}

		/**
		 * Register all of these AJAX handlers.
		 *
		 * The "wp_ajax_" action is used for logged in users, and "wp_ajax_nopriv_"
		 * executes for users that aren't logged in. This is for backpat with BP <1.6.
		 */
		foreach( $actions as $name => $function ) {
			add_action( 'wp_ajax_'        . $name, $function );
			add_action( 'wp_ajax_nopriv_' . $name, $function );
		}

		add_filter( 'bp_ajax_querystring', 'bp_legacy_theme_ajax_querystring', 10, 2 );

		/** Override **********************************************************/

		/**
		 * Fires after all of the BuddyPress theme compat actions have been added.
		 *
		 * @since 1.7.0
		 *
		 * @param BP_Legacy $this Current BP_Legacy instance.
		 */
		do_action_ref_array( 'bp_theme_compat_actions', array( &$this ) );
	}