<?php

/**
 * Injector that removes spans with no attributes
 */
class HTMLPurifier_Injector_RemoveSpansWithoutAttributes extends HTMLPurifier_Injector {
	/**
	 * @type string
	 */
	public $name = 'RemoveSpansWithoutAttributes';
	
	/**
	 * @type array
	 */
	public $needed = array (
			'span' 
	);
	
	/**
	 * @type HTMLPurifier_AttrValidator
	 */
	private $attrValidator;
	
	/**
	 * Used by AttrValidator.
	 * @type HTMLPurifier_Config
	 */
	private $config;
	
	/**
	 * @type HTMLPurifier_Context
	 */
	private $context;
	public function prepare($config, $context) {
		$this->attrValidator = new HTMLPurifier_AttrValidator ();
		$this->config = $config;
		$this->context = $context;
		return parent::prepare ( $config, $context );
	}
	
	/**
	 *
	 * @param HTMLPurifier_Token $token        	
	 */
	public function handleElement(&$token) {
		if ($token->name !== 'span' || ! $token instanceof HTMLPurifier_Token_Start) {
			return;
		}
		
		// We need to validate the attributes now since this doesn't normally
		// happen until after MakeWellFormed. If all the attributes are removed
		// the span needs to be removed too.
		$this->attrValidator->validateToken ( $token, $this->config, $this->context );
		$token->armor ['ValidateAttributes'] = true;
		
		if (! empty ( $token->attr )) {
			return;
		}
		
		$nesting = 0;
		while ( $this->forwardUntilEndToken ( $i, $current, $nesting ) ) {
		}
		
		if ($current instanceof HTMLPurifier_Token_End && $current->name === 'span') {
			// Mark closing span tag for deletion
			$current->markForDeletion = true;
			// Delete open span tag
			$token = false;
		}
	}
	
	/**
	 *
	 * @param HTMLPurifier_Token $token        	
	 */
	public function handleEnd(&$token) {
		if ($token->markForDeletion) {
			$token = false;
		}
	}
}

// vim: et sw=4 sts=4