<?php

/**
 * Performs miscellaneous cross attribute validation and filtering for
 * input elements. This is meant to be a post-transform.
 */
class HTMLPurifier_AttrTransform_Input extends HTMLPurifier_AttrTransform {
	/**
	 * @type HTMLPurifier_AttrDef_HTML_Pixels
	 */
	protected $pixels;
	public function __construct() {
		$this->pixels = new HTMLPurifier_AttrDef_HTML_Pixels ();
	}
	
	/**
	 *
	 * @param array $attr        	
	 * @param HTMLPurifier_Config $config        	
	 * @param HTMLPurifier_Context $context        	
	 * @return array
	 */
	public function transform($attr, $config, $context) {
		if (! isset ( $attr ['type'] )) {
			$t = 'text';
		} else {
			$t = strtolower ( $attr ['type'] );
		}
		if (isset ( $attr ['checked'] ) && $t !== 'radio' && $t !== 'checkbox') {
			unset ( $attr ['checked'] );
		}
		if (isset ( $attr ['maxlength'] ) && $t !== 'text' && $t !== 'password') {
			unset ( $attr ['maxlength'] );
		}
		if (isset ( $attr ['size'] ) && $t !== 'text' && $t !== 'password') {
			$result = $this->pixels->validate ( $attr ['size'], $config, $context );
			if ($result === false) {
				unset ( $attr ['size'] );
			} else {
				$attr ['size'] = $result;
			}
		}
		if (isset ( $attr ['src'] ) && $t !== 'image') {
			unset ( $attr ['src'] );
		}
		if (! isset ( $attr ['value'] ) && ($t === 'radio' || $t === 'checkbox')) {
			$attr ['value'] = '';
		}
		return $attr;
	}
}

// vim: et sw=4 sts=4