library/HTMLPurifier/AttrTypes.php

   1 <?php
   2
   3 /**
   4  * Provides lookup array of attribute types to HTMLPurifier_AttrDef objects
   5  */
   6 class HTMLPurifier_AttrTypes
   7 {
   8     /**
   9      * Lookup array of attribute string identifiers to concrete implementations
  10      */
  11     protected $info = array();
  12
  13     /**
  14      * Constructs the info array, supplying default implementations for attribute
  15      * types.
  16      */
  17     public function __construct() {
  18         // XXX This is kind of poor, since we don't actually /clone/
  19         // instances; instead, we use the supplied make() attribute. So,
  20         // the underlying class must know how to deal with arguments.
  21         // With the old implementation of Enum, that ignored its
  22         // arguments when handling a make dispatch, the IAlign
  23         // definition wouldn't work.
  24
  25         // pseudo-types, must be instantiated via shorthand
  26         $this->info['Enum']    = new HTMLPurifier_AttrDef_Enum();
  27         $this->info['Bool']    = new HTMLPurifier_AttrDef_HTML_Bool();
  28
  29         $this->info['CDATA']    = new HTMLPurifier_AttrDef_Text();
  30         $this->info['ID']       = new HTMLPurifier_AttrDef_HTML_ID();
  31         $this->info['Length']   = new HTMLPurifier_AttrDef_HTML_Length();
  32         $this->info['MultiLength'] = new HTMLPurifier_AttrDef_HTML_MultiLength();
  33         $this->info['NMTOKENS'] = new HTMLPurifier_AttrDef_HTML_Nmtokens();
  34         $this->info['Pixels']   = new HTMLPurifier_AttrDef_HTML_Pixels();
  35         $this->info['Text']     = new HTMLPurifier_AttrDef_Text();
  36         $this->info['URI']      = new HTMLPurifier_AttrDef_URI();
  37         $this->info['LanguageCode'] = new HTMLPurifier_AttrDef_Lang();
  38         $this->info['Color']    = new HTMLPurifier_AttrDef_HTML_Color();
  39         $this->info['IAlign']   = self::makeEnum('top,middle,bottom,left,right');
  40         $this->info['LAlign']   = self::makeEnum('top,bottom,left,right');
  41         $this->info['FrameTarget'] = new HTMLPurifier_AttrDef_HTML_FrameTarget();
  42
  43         // unimplemented aliases
  44         $this->info['ContentType'] = new HTMLPurifier_AttrDef_Text();
  45         $this->info['ContentTypes'] = new HTMLPurifier_AttrDef_Text();
  46         $this->info['Charsets'] = new HTMLPurifier_AttrDef_Text();
  47         $this->info['Character'] = new HTMLPurifier_AttrDef_Text();
  48
  49         // "proprietary" types
  50         $this->info['Class'] = new HTMLPurifier_AttrDef_HTML_Class();
  51
  52         // number is really a positive integer (one or more digits)
  53         // FIXME: ^^ not always, see start and value of list items
  54         $this->info['Number']   = new HTMLPurifier_AttrDef_Integer(false, false, true);
  55     }
  56
  57     private static function makeEnum($in) {
  58         return new HTMLPurifier_AttrDef_Clone(new HTMLPurifier_AttrDef_Enum(explode(',', $in)));
  59     }
  60
  61     /**
  62      * Retrieves a type
  63      * @param $type String type name
  64      * @return Object AttrDef for type
  65      */
  66     public function get($type) {
  67
  68         // determine if there is any extra info tacked on
  69         if (strpos($type, '#') !== false) list($type, $string) = explode('#', $type, 2);
  70         else $string = '';
  71
  72         if (!isset($this->info[$type])) {
  73             trigger_error('Cannot retrieve undefined attribute type ' . $type, E_USER_ERROR);
  74             return;
  75         }
  76
  77         return $this->info[$type]->make($string);
  78
  79     }
  80
  81     /**
  82      * Sets a new implementation for a type
  83      * @param $type String type name
  84      * @param $impl Object AttrDef for type
  85      */
  86     public function set($type, $impl) {
  87         $this->info[$type] = $impl;
  88     }
  89 }
  90
  91 // vim: et sw=4 sts=4