library/HTMLPurifier/Token/Tag.php

   1 <?php
   2
   3 /**
   4  * Abstract class of a tag token (start, end or empty), and its behavior.
   5  */
   6 class HTMLPurifier_Token_Tag extends HTMLPurifier_Token
   7 {
   8     /**
   9      * Static bool marker that indicates the class is a tag.
  10      *
  11      * This allows us to check objects with <tt>!empty($obj->is_tag)</tt>
  12      * without having to use a function call <tt>is_a()</tt>.
  13      */
  14     public $is_tag = true;
  15
  16     /**
  17      * The lower-case name of the tag, like 'a', 'b' or 'blockquote'.
  18      *
  19      * @note Strictly speaking, XML tags are case sensitive, so we shouldn't
  20      * be lower-casing them, but these tokens cater to HTML tags, which are
  21      * insensitive.
  22      */
  23     public $name;
  24
  25     /**
  26      * Associative array of the tag's attributes.
  27      */
  28     public $attr = array();
  29
  30     /**
  31      * Non-overloaded constructor, which lower-cases passed tag name.
  32      *
  33      * @param $name String name.
  34      * @param $attr Associative array of attributes.
  35      */
  36     public function __construct($name, $attr = array(), $line = null, $col = null) {
  37         $this->name = ctype_lower($name) ? $name : strtolower($name);
  38         foreach ($attr as $key => $value) {
  39             // normalization only necessary when key is not lowercase
  40             if (!ctype_lower($key)) {
  41                 $new_key = strtolower($key);
  42                 if (!isset($attr[$new_key])) {
  43                     $attr[$new_key] = $attr[$key];
  44                 }
  45                 if ($new_key !== $key) {
  46                     unset($attr[$key]);
  47                 }
  48             }
  49         }
  50         $this->attr = $attr;
  51         $this->line = $line;
  52         $this->col  = $col;
  53     }
  54 }
  55
  56 // vim: et sw=4 sts=4