| 1 |
efrain |
1 |
<?php
|
|
|
2 |
|
|
|
3 |
/**
|
|
|
4 |
* @todo Unit test
|
|
|
5 |
*/
|
|
|
6 |
class HTMLPurifier_ContentSets
|
|
|
7 |
{
|
|
|
8 |
|
|
|
9 |
/**
|
|
|
10 |
* List of content set strings (pipe separators) indexed by name.
|
|
|
11 |
* @type array
|
|
|
12 |
*/
|
|
|
13 |
public $info = array();
|
|
|
14 |
|
|
|
15 |
/**
|
|
|
16 |
* List of content set lookups (element => true) indexed by name.
|
|
|
17 |
* @type array
|
|
|
18 |
* @note This is in HTMLPurifier_HTMLDefinition->info_content_sets
|
|
|
19 |
*/
|
|
|
20 |
public $lookup = array();
|
|
|
21 |
|
|
|
22 |
/**
|
|
|
23 |
* Synchronized list of defined content sets (keys of info).
|
|
|
24 |
* @type array
|
|
|
25 |
*/
|
|
|
26 |
protected $keys = array();
|
|
|
27 |
/**
|
|
|
28 |
* Synchronized list of defined content values (values of info).
|
|
|
29 |
* @type array
|
|
|
30 |
*/
|
|
|
31 |
protected $values = array();
|
|
|
32 |
|
|
|
33 |
/**
|
|
|
34 |
* Merges in module's content sets, expands identifiers in the content
|
|
|
35 |
* sets and populates the keys, values and lookup member variables.
|
|
|
36 |
* @param HTMLPurifier_HTMLModule[] $modules List of HTMLPurifier_HTMLModule
|
|
|
37 |
*/
|
|
|
38 |
public function __construct($modules)
|
|
|
39 |
{
|
|
|
40 |
if (!is_array($modules)) {
|
|
|
41 |
$modules = array($modules);
|
|
|
42 |
}
|
|
|
43 |
// populate content_sets based on module hints
|
|
|
44 |
// sorry, no way of overloading
|
|
|
45 |
foreach ($modules as $module) {
|
|
|
46 |
foreach ($module->content_sets as $key => $value) {
|
|
|
47 |
$temp = $this->convertToLookup($value);
|
|
|
48 |
if (isset($this->lookup[$key])) {
|
|
|
49 |
// add it into the existing content set
|
|
|
50 |
$this->lookup[$key] = array_merge($this->lookup[$key], $temp);
|
|
|
51 |
} else {
|
|
|
52 |
$this->lookup[$key] = $temp;
|
|
|
53 |
}
|
|
|
54 |
}
|
|
|
55 |
}
|
|
|
56 |
$old_lookup = false;
|
|
|
57 |
while ($old_lookup !== $this->lookup) {
|
|
|
58 |
$old_lookup = $this->lookup;
|
|
|
59 |
foreach ($this->lookup as $i => $set) {
|
|
|
60 |
$add = array();
|
|
|
61 |
foreach ($set as $element => $x) {
|
|
|
62 |
if (isset($this->lookup[$element])) {
|
|
|
63 |
$add += $this->lookup[$element];
|
|
|
64 |
unset($this->lookup[$i][$element]);
|
|
|
65 |
}
|
|
|
66 |
}
|
|
|
67 |
$this->lookup[$i] += $add;
|
|
|
68 |
}
|
|
|
69 |
}
|
|
|
70 |
|
|
|
71 |
foreach ($this->lookup as $key => $lookup) {
|
|
|
72 |
$this->info[$key] = implode(' | ', array_keys($lookup));
|
|
|
73 |
}
|
|
|
74 |
$this->keys = array_keys($this->info);
|
|
|
75 |
$this->values = array_values($this->info);
|
|
|
76 |
}
|
|
|
77 |
|
|
|
78 |
/**
|
|
|
79 |
* Accepts a definition; generates and assigns a ChildDef for it
|
|
|
80 |
* @param HTMLPurifier_ElementDef $def HTMLPurifier_ElementDef reference
|
|
|
81 |
* @param HTMLPurifier_HTMLModule $module Module that defined the ElementDef
|
|
|
82 |
*/
|
|
|
83 |
public function generateChildDef(&$def, $module)
|
|
|
84 |
{
|
|
|
85 |
if (!empty($def->child)) { // already done!
|
|
|
86 |
return;
|
|
|
87 |
}
|
|
|
88 |
$content_model = $def->content_model;
|
|
|
89 |
if (is_string($content_model)) {
|
|
|
90 |
// Assume that $this->keys is alphanumeric
|
|
|
91 |
$def->content_model = preg_replace_callback(
|
|
|
92 |
'/\b(' . implode('|', $this->keys) . ')\b/',
|
|
|
93 |
array($this, 'generateChildDefCallback'),
|
|
|
94 |
$content_model
|
|
|
95 |
);
|
|
|
96 |
//$def->content_model = str_replace(
|
|
|
97 |
// $this->keys, $this->values, $content_model);
|
|
|
98 |
}
|
|
|
99 |
$def->child = $this->getChildDef($def, $module);
|
|
|
100 |
}
|
|
|
101 |
|
|
|
102 |
public function generateChildDefCallback($matches)
|
|
|
103 |
{
|
|
|
104 |
return $this->info[$matches[0]];
|
|
|
105 |
}
|
|
|
106 |
|
|
|
107 |
/**
|
|
|
108 |
* Instantiates a ChildDef based on content_model and content_model_type
|
|
|
109 |
* member variables in HTMLPurifier_ElementDef
|
|
|
110 |
* @note This will also defer to modules for custom HTMLPurifier_ChildDef
|
|
|
111 |
* subclasses that need content set expansion
|
|
|
112 |
* @param HTMLPurifier_ElementDef $def HTMLPurifier_ElementDef to have ChildDef extracted
|
|
|
113 |
* @param HTMLPurifier_HTMLModule $module Module that defined the ElementDef
|
|
|
114 |
* @return HTMLPurifier_ChildDef corresponding to ElementDef
|
|
|
115 |
*/
|
|
|
116 |
public function getChildDef($def, $module)
|
|
|
117 |
{
|
|
|
118 |
$value = $def->content_model;
|
|
|
119 |
if (is_object($value)) {
|
|
|
120 |
trigger_error(
|
|
|
121 |
'Literal object child definitions should be stored in '.
|
|
|
122 |
'ElementDef->child not ElementDef->content_model',
|
|
|
123 |
E_USER_NOTICE
|
|
|
124 |
);
|
|
|
125 |
return $value;
|
|
|
126 |
}
|
|
|
127 |
switch ($def->content_model_type) {
|
|
|
128 |
case 'required':
|
|
|
129 |
return new HTMLPurifier_ChildDef_Required($value);
|
|
|
130 |
case 'optional':
|
|
|
131 |
return new HTMLPurifier_ChildDef_Optional($value);
|
|
|
132 |
case 'empty':
|
|
|
133 |
return new HTMLPurifier_ChildDef_Empty();
|
|
|
134 |
case 'custom':
|
|
|
135 |
return new HTMLPurifier_ChildDef_Custom($value);
|
|
|
136 |
}
|
|
|
137 |
// defer to its module
|
|
|
138 |
$return = false;
|
|
|
139 |
if ($module->defines_child_def) { // save a func call
|
|
|
140 |
$return = $module->getChildDef($def);
|
|
|
141 |
}
|
|
|
142 |
if ($return !== false) {
|
|
|
143 |
return $return;
|
|
|
144 |
}
|
|
|
145 |
// error-out
|
|
|
146 |
trigger_error(
|
|
|
147 |
'Could not determine which ChildDef class to instantiate',
|
|
|
148 |
E_USER_ERROR
|
|
|
149 |
);
|
|
|
150 |
return false;
|
|
|
151 |
}
|
|
|
152 |
|
|
|
153 |
/**
|
|
|
154 |
* Converts a string list of elements separated by pipes into
|
|
|
155 |
* a lookup array.
|
|
|
156 |
* @param string $string List of elements
|
|
|
157 |
* @return array Lookup array of elements
|
|
|
158 |
*/
|
|
|
159 |
protected function convertToLookup($string)
|
|
|
160 |
{
|
|
|
161 |
$array = explode('|', str_replace(' ', '', $string));
|
|
|
162 |
$ret = array();
|
|
|
163 |
foreach ($array as $k) {
|
|
|
164 |
$ret[$k] = true;
|
|
|
165 |
}
|
|
|
166 |
return $ret;
|
|
|
167 |
}
|
|
|
168 |
}
|
|
|
169 |
|
|
|
170 |
// vim: et sw=4 sts=4
|