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   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       * @type HTMLPurifier_AttrDef[]
  11       */
  12      protected $info = array();
  13  
  14      /**
  15       * Constructs the info array, supplying default implementations for attribute
  16       * types.
  17       */
  18      public function __construct()
  19      {
  20          // XXX This is kind of poor, since we don't actually /clone/
  21          // instances; instead, we use the supplied make() attribute. So,
  22          // the underlying class must know how to deal with arguments.
  23          // With the old implementation of Enum, that ignored its
  24          // arguments when handling a make dispatch, the IAlign
  25          // definition wouldn't work.
  26  
  27          // pseudo-types, must be instantiated via shorthand
  28          $this->info['Enum']    = new HTMLPurifier_AttrDef_Enum();
  29          $this->info['Bool']    = new HTMLPurifier_AttrDef_HTML_Bool();
  30  
  31          $this->info['CDATA']    = new HTMLPurifier_AttrDef_Text();
  32          $this->info['ID']       = new HTMLPurifier_AttrDef_HTML_ID();
  33          $this->info['Length']   = new HTMLPurifier_AttrDef_HTML_Length();
  34          $this->info['MultiLength'] = new HTMLPurifier_AttrDef_HTML_MultiLength();
  35          $this->info['NMTOKENS'] = new HTMLPurifier_AttrDef_HTML_Nmtokens();
  36          $this->info['Pixels']   = new HTMLPurifier_AttrDef_HTML_Pixels();
  37          $this->info['Text']     = new HTMLPurifier_AttrDef_Text();
  38          $this->info['URI']      = new HTMLPurifier_AttrDef_URI();
  39          $this->info['LanguageCode'] = new HTMLPurifier_AttrDef_Lang();
  40          $this->info['Color']    = new HTMLPurifier_AttrDef_HTML_Color();
  41          $this->info['IAlign']   = self::makeEnum('top,middle,bottom,left,right');
  42          $this->info['LAlign']   = self::makeEnum('top,bottom,left,right');
  43          $this->info['FrameTarget'] = new HTMLPurifier_AttrDef_HTML_FrameTarget();
  44  
  45          // unimplemented aliases
  46          $this->info['ContentType'] = new HTMLPurifier_AttrDef_Text();
  47          $this->info['ContentTypes'] = new HTMLPurifier_AttrDef_Text();
  48          $this->info['Charsets'] = new HTMLPurifier_AttrDef_Text();
  49          $this->info['Character'] = new HTMLPurifier_AttrDef_Text();
  50  
  51          // "proprietary" types
  52          $this->info['Class'] = new HTMLPurifier_AttrDef_HTML_Class();
  53  
  54          // number is really a positive integer (one or more digits)
  55          // FIXME: ^^ not always, see start and value of list items
  56          $this->info['Number']   = new HTMLPurifier_AttrDef_Integer(false, false, true);
  57      }
  58  
  59      private static function makeEnum($in)
  60      {
  61          return new HTMLPurifier_AttrDef_Clone(new HTMLPurifier_AttrDef_Enum(explode(',', $in)));
  62      }
  63  
  64      /**
  65       * Retrieves a type
  66       * @param string $type String type name
  67       * @return HTMLPurifier_AttrDef Object AttrDef for type
  68       */
  69      public function get($type)
  70      {
  71          // determine if there is any extra info tacked on
  72          if (strpos($type, '#') !== false) {
  73              list($type, $string) = explode('#', $type, 2);
  74          } else {
  75              $string = '';
  76          }
  77  
  78          if (!isset($this->info[$type])) {
  79              trigger_error('Cannot retrieve undefined attribute type ' . $type, E_USER_ERROR);
  80              return;
  81          }
  82          return $this->info[$type]->make($string);
  83      }
  84  
  85      /**
  86       * Sets a new implementation for a type
  87       * @param string $type String type name
  88       * @param HTMLPurifier_AttrDef $impl Object AttrDef for type
  89       */
  90      public function set($type, $impl)
  91      {
  92          $this->info[$type] = $impl;
  93      }
  94  }
  95  
  96  // vim: et sw=4 sts=4