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authorNicolas LÅ“uillet <nicolas@loeuillet.org>2014-02-21 15:57:10 +0100
committerNicolas LÅ“uillet <nicolas@loeuillet.org>2014-02-21 15:57:10 +0100
commit99679d06884120c57f43b44e55e03595f1f87bed (patch)
treea3f2a1aa1afdaeca1386d0c6e8a75344fd2241fb /inc/3rdparty/htmlpurifier/HTMLPurifier/AttrValidator.php
parent655214ab30ee84884dc408488b85586f36263fcb (diff)
parentd3b47e94705e17b3ba3529cbb1dc6efe69c5d2b7 (diff)
downloadwallabag-99679d06884120c57f43b44e55e03595f1f87bed.tar.gz
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Merge pull request #481 from wallabag/dev1.5.2
1.5.2
Diffstat (limited to 'inc/3rdparty/htmlpurifier/HTMLPurifier/AttrValidator.php')
-rw-r--r--inc/3rdparty/htmlpurifier/HTMLPurifier/AttrValidator.php178
1 files changed, 178 insertions, 0 deletions
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/AttrValidator.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/AttrValidator.php
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1<?php
2
3/**
4 * Validates the attributes of a token. Doesn't manage required attributes
5 * very well. The only reason we factored this out was because RemoveForeignElements
6 * also needed it besides ValidateAttributes.
7 */
8class HTMLPurifier_AttrValidator
9{
10
11 /**
12 * Validates the attributes of a token, mutating it as necessary.
13 * that has valid tokens
14 * @param HTMLPurifier_Token $token Token to validate.
15 * @param HTMLPurifier_Config $config Instance of HTMLPurifier_Config
16 * @param HTMLPurifier_Context $context Instance of HTMLPurifier_Context
17 */
18 public function validateToken($token, $config, $context)
19 {
20 $definition = $config->getHTMLDefinition();
21 $e =& $context->get('ErrorCollector', true);
22
23 // initialize IDAccumulator if necessary
24 $ok =& $context->get('IDAccumulator', true);
25 if (!$ok) {
26 $id_accumulator = HTMLPurifier_IDAccumulator::build($config, $context);
27 $context->register('IDAccumulator', $id_accumulator);
28 }
29
30 // initialize CurrentToken if necessary
31 $current_token =& $context->get('CurrentToken', true);
32 if (!$current_token) {
33 $context->register('CurrentToken', $token);
34 }
35
36 if (!$token instanceof HTMLPurifier_Token_Start &&
37 !$token instanceof HTMLPurifier_Token_Empty
38 ) {
39 return;
40 }
41
42 // create alias to global definition array, see also $defs
43 // DEFINITION CALL
44 $d_defs = $definition->info_global_attr;
45
46 // don't update token until the very end, to ensure an atomic update
47 $attr = $token->attr;
48
49 // do global transformations (pre)
50 // nothing currently utilizes this
51 foreach ($definition->info_attr_transform_pre as $transform) {
52 $attr = $transform->transform($o = $attr, $config, $context);
53 if ($e) {
54 if ($attr != $o) {
55 $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
56 }
57 }
58 }
59
60 // do local transformations only applicable to this element (pre)
61 // ex. <p align="right"> to <p style="text-align:right;">
62 foreach ($definition->info[$token->name]->attr_transform_pre as $transform) {
63 $attr = $transform->transform($o = $attr, $config, $context);
64 if ($e) {
65 if ($attr != $o) {
66 $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
67 }
68 }
69 }
70
71 // create alias to this element's attribute definition array, see
72 // also $d_defs (global attribute definition array)
73 // DEFINITION CALL
74 $defs = $definition->info[$token->name]->attr;
75
76 $attr_key = false;
77 $context->register('CurrentAttr', $attr_key);
78
79 // iterate through all the attribute keypairs
80 // Watch out for name collisions: $key has previously been used
81 foreach ($attr as $attr_key => $value) {
82
83 // call the definition
84 if (isset($defs[$attr_key])) {
85 // there is a local definition defined
86 if ($defs[$attr_key] === false) {
87 // We've explicitly been told not to allow this element.
88 // This is usually when there's a global definition
89 // that must be overridden.
90 // Theoretically speaking, we could have a
91 // AttrDef_DenyAll, but this is faster!
92 $result = false;
93 } else {
94 // validate according to the element's definition
95 $result = $defs[$attr_key]->validate(
96 $value,
97 $config,
98 $context
99 );
100 }
101 } elseif (isset($d_defs[$attr_key])) {
102 // there is a global definition defined, validate according
103 // to the global definition
104 $result = $d_defs[$attr_key]->validate(
105 $value,
106 $config,
107 $context
108 );
109 } else {
110 // system never heard of the attribute? DELETE!
111 $result = false;
112 }
113
114 // put the results into effect
115 if ($result === false || $result === null) {
116 // this is a generic error message that should replaced
117 // with more specific ones when possible
118 if ($e) {
119 $e->send(E_ERROR, 'AttrValidator: Attribute removed');
120 }
121
122 // remove the attribute
123 unset($attr[$attr_key]);
124 } elseif (is_string($result)) {
125 // generally, if a substitution is happening, there
126 // was some sort of implicit correction going on. We'll
127 // delegate it to the attribute classes to say exactly what.
128
129 // simple substitution
130 $attr[$attr_key] = $result;
131 } else {
132 // nothing happens
133 }
134
135 // we'd also want slightly more complicated substitution
136 // involving an array as the return value,
137 // although we're not sure how colliding attributes would
138 // resolve (certain ones would be completely overriden,
139 // others would prepend themselves).
140 }
141
142 $context->destroy('CurrentAttr');
143
144 // post transforms
145
146 // global (error reporting untested)
147 foreach ($definition->info_attr_transform_post as $transform) {
148 $attr = $transform->transform($o = $attr, $config, $context);
149 if ($e) {
150 if ($attr != $o) {
151 $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
152 }
153 }
154 }
155
156 // local (error reporting untested)
157 foreach ($definition->info[$token->name]->attr_transform_post as $transform) {
158 $attr = $transform->transform($o = $attr, $config, $context);
159 if ($e) {
160 if ($attr != $o) {
161 $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
162 }
163 }
164 }
165
166 $token->attr = $attr;
167
168 // destroy CurrentToken if we made it ourselves
169 if (!$current_token) {
170 $context->destroy('CurrentToken');
171 }
172
173 }
174
175
176}
177
178// vim: et sw=4 sts=4