<?php

/**
 * Takes the contents of blockquote when in strict and reformats for validation.
 */
class HTMLPurifier_ChildDef_StrictBlockquote extends HTMLPurifier_ChildDef_Required {
	/**
	 * @type array
	 */
	protected $real_elements;
	
	/**
	 * @type array
	 */
	protected $fake_elements;
	
	/**
	 * @type bool
	 */
	public $allow_empty = true;
	
	/**
	 * @type string
	 */
	public $type = 'strictblockquote';
	
	/**
	 * @type bool
	 */
	protected $init = false;
	
	/**
	 *
	 * @param HTMLPurifier_Config $config        	
	 * @return array @note We don't want MakeWellFormed to auto-close inline elements since
	 *         they might be allowed.
	 */
	public function getAllowedElements($config) {
		$this->init ( $config );
		return $this->fake_elements;
	}
	
	/**
	 *
	 * @param array $children        	
	 * @param HTMLPurifier_Config $config        	
	 * @param HTMLPurifier_Context $context        	
	 * @return array
	 */
	public function validateChildren($children, $config, $context) {
		$this->init ( $config );
		
		// trick the parent class into thinking it allows more
		$this->elements = $this->fake_elements;
		$result = parent::validateChildren ( $children, $config, $context );
		$this->elements = $this->real_elements;
		
		if ($result === false) {
			return array ();
		}
		if ($result === true) {
			$result = $children;
		}
		
		$def = $config->getHTMLDefinition ();
		$block_wrap_name = $def->info_block_wrapper;
		$block_wrap = false;
		$ret = array ();
		
		foreach ( $result as $node ) {
			if ($block_wrap === false) {
				if (($node instanceof HTMLPurifier_Node_Text && ! $node->is_whitespace) || ($node instanceof HTMLPurifier_Node_Element && ! isset ( $this->elements [$node->name] ))) {
					$block_wrap = new HTMLPurifier_Node_Element ( $def->info_block_wrapper );
					$ret [] = $block_wrap;
				}
			} else {
				if ($node instanceof HTMLPurifier_Node_Element && isset ( $this->elements [$node->name] )) {
					$block_wrap = false;
				}
			}
			if ($block_wrap) {
				$block_wrap->children [] = $node;
			} else {
				$ret [] = $node;
			}
		}
		return $ret;
	}
	
	/**
	 *
	 * @param HTMLPurifier_Config $config        	
	 */
	private function init($config) {
		if (! $this->init) {
			$def = $config->getHTMLDefinition ();
			// allow all inline elements
			$this->real_elements = $this->elements;
			$this->fake_elements = $def->info_content_sets ['Flow'];
			$this->fake_elements ['#PCDATA'] = true;
			$this->init = true;
		}
	}
}

// vim: et sw=4 sts=4