<?php

/**
 * Class for handling width/height length attribute transformations to CSS
 */
class HTMLPurifier_AttrTransform_Length extends HTMLPurifier_AttrTransform {
	
	/**
	 * @type string
	 */
	protected $name;
	
	/**
	 * @type string
	 */
	protected $cssName;
	public function __construct($name, $css_name = null) {
		$this->name = $name;
		$this->cssName = $css_name ? $css_name : $name;
	}
	
	/**
	 *
	 * @param array $attr        	
	 * @param HTMLPurifier_Config $config        	
	 * @param HTMLPurifier_Context $context        	
	 * @return array
	 */
	public function transform($attr, $config, $context) {
		if (! isset ( $attr [$this->name] )) {
			return $attr;
		}
		$length = $this->confiscateAttr ( $attr, $this->name );
		if (ctype_digit ( $length )) {
			$length .= 'px';
		}
		$this->prependCSS ( $attr, $this->cssName . ":$length;" );
		return $attr;
	}
}

// vim: et sw=4 sts=4