Source Reference:

• Component: BuddyPress :: bp-core

  File: /bp-core/bp-core-buddybar.php :: Trac Source Line: 73

  	// Look for current component
  	if ( bp_is_current_component( $slug ) && !bp_current_action() ) {
  		if ( !is_object( $screen_function[0] ) )
  			add_action( 'bp_screens', $screen_function );
  		else
  			add_action( 'bp_screens', array( &$screen_function[0], $screen_function[1] ), 3 );
  
  		if ( !empty( $default_subnav_slug ) )
  			$bp->current_action = apply_filters( 'bp_default_component_subnav', $default_subnav_slug, $r );
  
  	// Look for current item
  	} elseif ( bp_is_current_item( $slug ) && !bp_current_action() ) {
  		if ( !is_object( $screen_function[0] ) )
  			add_action( 'bp_screens', $screen_function );
  		else
  			add_action( 'bp_screens', array( &$screen_function[0], $screen_function[1] ), 3 );
  
  		if ( !empty( $default_subnav_slug ) )
  			$bp->current_action = apply_filters( 'bp_default_component_subnav', $default_subnav_slug, $r );
  

• Component: BuddyPress :: bp-core

  File: /bp-core/bp-core-buddybar.php :: Trac Source Line: 83

  	// Look for current item
  	} elseif ( bp_is_current_item( $slug ) && !bp_current_action() ) {
  		if ( !is_object( $screen_function[0] ) )
  			add_action( 'bp_screens', $screen_function );
  		else
  			add_action( 'bp_screens', array( &$screen_function[0], $screen_function[1] ), 3 );
  
  		if ( !empty( $default_subnav_slug ) )
  			$bp->current_action = apply_filters( 'bp_default_component_subnav', $default_subnav_slug, $r );
  	}
  
  	do_action( 'bp_core_new_nav_item', $r, $args, $defaults );
  }
  
  /**
   * Modify the default subnav item to load when a top level nav item is clicked.
   *
   * @package BuddyPress Core
   * @global object $bp Global BuddyPress settings object