Cool widget class for WordPress

gistfile1.aw

<?php

function rockstars_register_default_widget( $sidebar, $class_name, $settings ) {
	global $rockstars_widgets;

	if( !is_admin() ) {
		return $rockstars_widgets->register_default_widget( $sidebar, $class_name, $settings );
	}
	return false;
}

function rockstars_register_horizontal_sidebar( $sidebar_id, $columns ) {
	global $rockstars_widgets;

	if( !is_admin() ) {
		return $rockstars_widgets->register_horizontal_sidebar( $sidebar_id, $columns );
	}
	return false;
}

class Rockstars_Widgets {
	private $custom_settings = array();

	public $horizontal_end_row = '<div class="clearfix"></div>';
	private $horizontal_sidebars = array();
	private $horizontal_counter = array();

	function __construct() {
		add_filter( 'dynamic_sidebar_params', array( &$this, '_sidebar_params' ) );
	}

	public function register_default_widget( $sidebar, $class_name, $settings ) {
		global $_wp_sidebars_widgets, $wp_widget_factory;

		if( empty( $_wp_sidebars_widgets[ $sidebar ] ) ) {
			if( isset( $wp_widget_factory->widgets[ $class_name ] ) ) {
				$class = $wp_widget_factory->widgets[ $class_name ];

				if( !isset( $this->custom_settings[ $class->option_name ] ) ) { 
					$this->custom_settings[ $class->option_name ] = array();
					add_filter( 'option_' . $class->option_name, array( &$this, '_register_default_widgets_settings' ) );
				}
				
				$id = 900 + count( $this->custom_settings[ $class->option_name ] );
				$this->custom_settings[ $class->option_name ][ $id ] =  $settings;
				$_wp_sidebars_widgets[ $sidebar ][] = $class->id_base . '-' . $id;

				return true;
			}
		}

		return false;
	}

	function _register_default_widgets_settings( $value ) {
		$filter = substr( current_filter(), 7);

		if( isset( $this->custom_settings[ $filter ] ) ) {
			$value = $value + $this->custom_settings[ $filter ];
		}

		return $value;
	}


	public function register_horizontal_sidebar( $sidebar_id, $columns ) {
		global $_wp_sidebars_widgets;

		if( ! empty( $_wp_sidebars_widgets[ $sidebar_id ] ) ) {
			$this->horizontal_sidebars[ $sidebar_id ] = intval( $columns );
			return true;
		}

		return false;
	}

	function _sidebar_params( $params ) {
		$sidebar_id = $params[0]['id'];

		if( ! isset( $this->horizontal_sidebars[ $sidebar_id ] ) ) {
			return $params;
		}

		if( ! isset( $this->horizontal_counter[ $sidebar_id ] ) ) {
			$this->horizontal_counter[ $sidebar_id ] = 0;
		}

		$this->horizontal_counter[ $sidebar_id ]++;

		$additional_classes = trim( apply_filters( 'rockstar_sidebar_classes', '', $this->horizontal_sidebars[ $sidebar_id ], $sidebar_id ) );

		if( $this->horizontal_counter[ $sidebar_id ] % $this->horizontal_sidebars[ $sidebar_id ] == 0 ) {
			$additional_classes .= ' last';
			$params[0]['after_widget']  = $params[0]['after_widget'] . $this->horizontal_end_row;
		}

		$params[0]['before_widget'] = preg_replace( '/class="/', "class=\"' . $additional_classes . ' ", $params[0]['before_widget'], 1 );

		return $params;
	}
}

$GLOBALS['rockstars_widgets'] = new Rockstars_Widgets();

?>