1<?php
2
3/**
4 * Provides lookup array of attribute types to HTMLPurifier_AttrDef objects
5 */
6class 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
97