<?php

/**
 * Definition that uses different definitions depending on context.
 *
 * The del and ins tags are notable because they allow different types of
 * elements depending on whether or not they're in a block or inline context.
 * Chameleon allows this behavior to happen by using two different
 * definitions depending on context.  While this somewhat generalized,
 * it is specifically intended for those two tags.
 */
class HTMLPurifier_ChildDef_Chameleon extends HTMLPurifier_ChildDef {
	
	/**
	 * Instance of the definition object to use when inline.
	 * Usually stricter.
	 * @type HTMLPurifier_ChildDef_Optional
	 */
	public $inline;
	
	/**
	 * Instance of the definition object to use when block.
	 * @type HTMLPurifier_ChildDef_Optional
	 */
	public $block;
	
	/**
	 * @type string
	 */
	public $type = 'chameleon';
	
	/**
	 *
	 * @param array $inline
	 *        	List of elements to allow when inline.
	 * @param array $block
	 *        	List of elements to allow when block.
	 */
	public function __construct($inline, $block) {
		$this->inline = new HTMLPurifier_ChildDef_Optional ( $inline );
		$this->block = new HTMLPurifier_ChildDef_Optional ( $block );
		$this->elements = $this->block->elements;
	}
	
	/**
	 *
	 * @param HTMLPurifier_Node[] $children        	
	 * @param HTMLPurifier_Config $config        	
	 * @param HTMLPurifier_Context $context        	
	 * @return bool
	 */
	public function validateChildren($children, $config, $context) {
		if ($context->get ( 'IsInline' ) === false) {
			return $this->block->validateChildren ( $children, $config, $context );
		} else {
			return $this->inline->validateChildren ( $children, $config, $context );
		}
	}
}

// vim: et sw=4 sts=4