<?php
abstract class FormositeComponent
{
	protected $id;
	protected $path;
	protected $parentId = null;
		
    abstract function add(FormositeComponent $comp);
    abstract function remove(FormositeComponent $comp);
    abstract function output($level = 0);
    abstract function number();
    abstract function nextChildId();
    
    public function setId($id, $parentId, $parentPath)
    {
    	$this->parentId = $parentId;
    	$this->id = get_class($this).'#'.$id;
    	$this->path = $parentPath.'_'.get_class($this).'#'.$id;
    }
   
    public function pad($level)
    {
    	$ret = "";
    	if ($level > 0) {
	    	for ($x = 0; $x < $level; $x++) {
	    		$ret .= "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";
	    	}
	    	$ret .= "\____";
    	}
    	return $ret;
    }
    
	public function accept(FormositeVisitor $visitor, $level = 1) {
        $visitor->visit($this, $level);
    }
} 
?>