undo-single-event-filter.php

/**
 * Helper to undo the effects of the Tribe_Template_Factory::title_tag()
 * filter (runs on wp_title). 
 * 
 * Since in current builds (3.9.x) the actual template object is anonymous 
 * it is not possible to cleanly unhook it with noodling in WP's global filter
 * array, hence the approach taken here.  
 */
class SingleEventTitleFilter {
	static $title = '';

	static function undo() {
		add_filter( 'wp_title', array( __CLASS__, 'capture' ), 5 );
		add_filter( 'wp_title', array( __CLASS__, 'restore' ), 50 );
	}

	static function capture( $title ) {
		if ( is_singular( TribeEvents::POSTTYPE ) ) self::$title = $title;
		return $title;
	}

	static function restore( $title ) {
		if ( ! empty( self::$title ) ) return self::$title;
		return $title;
	}
}

SingleEventTitleFilter::undo();