ILIAS  release_5-4 Revision v5.4.26-12-gabc799a52e6
HTMLModuleManager.php
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1<?php
2
4{
5
9 public $doctypes;
10
15 public $doctype;
16
20 public $attrTypes;
21
27 public $modules = array();
28
35 public $registeredModules = array();
36
43 public $userModules = array();
44
50 public $elementLookup = array();
51
56 public $prefixes = array('HTMLPurifier_HTMLModule_');
57
62
67
72 public $trusted = false;
73
74 public function __construct()
75 {
76 // editable internal objects
77 $this->attrTypes = new HTMLPurifier_AttrTypes();
78 $this->doctypes = new HTMLPurifier_DoctypeRegistry();
79
80 // setup basic modules
81 $common = array(
82 'CommonAttributes', 'Text', 'Hypertext', 'List',
83 'Presentation', 'Edit', 'Bdo', 'Tables', 'Image',
84 'StyleAttribute',
85 // Unsafe:
86 'Scripting', 'Object', 'Forms',
87 // Sorta legacy, but present in strict:
88 'Name',
89 );
90 $transitional = array('Legacy', 'Target', 'Iframe');
91 $xml = array('XMLCommonAttributes');
92 $non_xml = array('NonXMLCommonAttributes');
93
94 // setup basic doctypes
95 $this->doctypes->register(
96 'HTML 4.01 Transitional',
97 false,
98 array_merge($common, $transitional, $non_xml),
99 array('Tidy_Transitional', 'Tidy_Proprietary'),
100 array(),
101 '-//W3C//DTD HTML 4.01 Transitional//EN',
102 'http://www.w3.org/TR/html4/loose.dtd'
103 );
104
105 $this->doctypes->register(
106 'HTML 4.01 Strict',
107 false,
108 array_merge($common, $non_xml),
109 array('Tidy_Strict', 'Tidy_Proprietary', 'Tidy_Name'),
110 array(),
111 '-//W3C//DTD HTML 4.01//EN',
112 'http://www.w3.org/TR/html4/strict.dtd'
113 );
114
115 $this->doctypes->register(
116 'XHTML 1.0 Transitional',
117 true,
118 array_merge($common, $transitional, $xml, $non_xml),
119 array('Tidy_Transitional', 'Tidy_XHTML', 'Tidy_Proprietary', 'Tidy_Name'),
120 array(),
121 '-//W3C//DTD XHTML 1.0 Transitional//EN',
122 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'
123 );
124
125 $this->doctypes->register(
126 'XHTML 1.0 Strict',
127 true,
128 array_merge($common, $xml, $non_xml),
129 array('Tidy_Strict', 'Tidy_XHTML', 'Tidy_Strict', 'Tidy_Proprietary', 'Tidy_Name'),
130 array(),
131 '-//W3C//DTD XHTML 1.0 Strict//EN',
132 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'
133 );
134
135 $this->doctypes->register(
136 'XHTML 1.1',
137 true,
138 // Iframe is a real XHTML 1.1 module, despite being
139 // "transitional"!
140 array_merge($common, $xml, array('Ruby', 'Iframe')),
141 array('Tidy_Strict', 'Tidy_XHTML', 'Tidy_Proprietary', 'Tidy_Strict', 'Tidy_Name'), // Tidy_XHTML1_1
142 array(),
143 '-//W3C//DTD XHTML 1.1//EN',
144 'http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd'
145 );
146
147 }
148
170 public function registerModule($module, $overload = false)
171 {
172 if (is_string($module)) {
173 // attempt to load the module
174 $original_module = $module;
175 $ok = false;
176 foreach ($this->prefixes as $prefix) {
177 $module = $prefix . $original_module;
178 if (class_exists($module)) {
179 $ok = true;
180 break;
181 }
182 }
183 if (!$ok) {
184 $module = $original_module;
185 if (!class_exists($module)) {
186 trigger_error(
187 $original_module . ' module does not exist',
188 E_USER_ERROR
189 );
190 return;
191 }
192 }
193 $module = new $module();
194 }
195 if (empty($module->name)) {
196 trigger_error('Module instance of ' . get_class($module) . ' must have name');
197 return;
198 }
199 if (!$overload && isset($this->registeredModules[$module->name])) {
200 trigger_error('Overloading ' . $module->name . ' without explicit overload parameter', E_USER_WARNING);
201 }
202 $this->registeredModules[$module->name] = $module;
203 }
204
209 public function addModule($module)
210 {
211 $this->registerModule($module);
212 if (is_object($module)) {
213 $module = $module->name;
214 }
215 $this->userModules[] = $module;
216 }
217
222 public function addPrefix($prefix)
223 {
224 $this->prefixes[] = $prefix;
225 }
226
232 public function setup($config)
233 {
234 $this->trusted = $config->get('HTML.Trusted');
235
236 // generate
237 $this->doctype = $this->doctypes->make($config);
238 $modules = $this->doctype->modules;
239
240 // take out the default modules that aren't allowed
241 $lookup = $config->get('HTML.AllowedModules');
242 $special_cases = $config->get('HTML.CoreModules');
243
244 if (is_array($lookup)) {
245 foreach ($modules as $k => $m) {
246 if (isset($special_cases[$m])) {
247 continue;
248 }
249 if (!isset($lookup[$m])) {
250 unset($modules[$k]);
251 }
252 }
253 }
254
255 // custom modules
256 if ($config->get('HTML.Proprietary')) {
257 $modules[] = 'Proprietary';
258 }
259 if ($config->get('HTML.SafeObject')) {
260 $modules[] = 'SafeObject';
261 }
262 if ($config->get('HTML.SafeEmbed')) {
263 $modules[] = 'SafeEmbed';
264 }
265 if ($config->get('HTML.SafeScripting') !== array()) {
266 $modules[] = 'SafeScripting';
267 }
268 if ($config->get('HTML.Nofollow')) {
269 $modules[] = 'Nofollow';
270 }
271 if ($config->get('HTML.TargetBlank')) {
272 $modules[] = 'TargetBlank';
273 }
274 // NB: HTML.TargetNoreferrer and HTML.TargetNoopener must be AFTER HTML.TargetBlank
275 // so that its post-attr-transform gets run afterwards.
276 if ($config->get('HTML.TargetNoreferrer')) {
277 $modules[] = 'TargetNoreferrer';
278 }
279 if ($config->get('HTML.TargetNoopener')) {
280 $modules[] = 'TargetNoopener';
281 }
282
283 // merge in custom modules
284 $modules = array_merge($modules, $this->userModules);
285
286 foreach ($modules as $module) {
287 $this->processModule($module);
288 $this->modules[$module]->setup($config);
289 }
290
291 foreach ($this->doctype->tidyModules as $module) {
292 $this->processModule($module);
293 $this->modules[$module]->setup($config);
294 }
295
296 // prepare any injectors
297 foreach ($this->modules as $module) {
298 $n = array();
299 foreach ($module->info_injector as $injector) {
300 if (!is_object($injector)) {
301 $class = "HTMLPurifier_Injector_$injector";
302 $injector = new $class;
303 }
304 $n[$injector->name] = $injector;
305 }
306 $module->info_injector = $n;
307 }
308
309 // setup lookup table based on all valid modules
310 foreach ($this->modules as $module) {
311 foreach ($module->info as $name => $def) {
312 if (!isset($this->elementLookup[$name])) {
313 $this->elementLookup[$name] = array();
314 }
315 $this->elementLookup[$name][] = $module->name;
316 }
317 }
318
319 // note the different choice
320 $this->contentSets = new HTMLPurifier_ContentSets(
321 // content set assembly deals with all possible modules,
322 // not just ones deemed to be "safe"
323 $this->modules
324 );
325 $this->attrCollections = new HTMLPurifier_AttrCollections(
326 $this->attrTypes,
327 // there is no way to directly disable a global attribute,
328 // but using AllowedAttributes or simply not including
329 // the module in your custom doctype should be sufficient
330 $this->modules
331 );
332 }
333
338 public function processModule($module)
339 {
340 if (!isset($this->registeredModules[$module]) || is_object($module)) {
341 $this->registerModule($module);
342 }
343 $this->modules[$module] = $this->registeredModules[$module];
344 }
345
350 public function getElements()
351 {
352 $elements = array();
353 foreach ($this->modules as $module) {
354 if (!$this->trusted && !$module->safe) {
355 continue;
356 }
357 foreach ($module->info as $name => $v) {
358 if (isset($elements[$name])) {
359 continue;
360 }
361 $elements[$name] = $this->getElement($name);
362 }
363 }
364
365 // remove dud elements, this happens when an element that
366 // appeared to be safe actually wasn't
367 foreach ($elements as $n => $v) {
368 if ($v === false) {
369 unset($elements[$n]);
370 }
371 }
372
373 return $elements;
374
375 }
376
387 public function getElement($name, $trusted = null)
388 {
389 if (!isset($this->elementLookup[$name])) {
390 return false;
391 }
392
393 // setup global state variables
394 $def = false;
395 if ($trusted === null) {
397 }
398
399 // iterate through each module that has registered itself to this
400 // element
401 foreach ($this->elementLookup[$name] as $module_name) {
402 $module = $this->modules[$module_name];
403
404 // refuse to create/merge from a module that is deemed unsafe--
405 // pretend the module doesn't exist--when trusted mode is not on.
406 if (!$trusted && !$module->safe) {
407 continue;
408 }
409
410 // clone is used because, ideally speaking, the original
411 // definition should not be modified. Usually, this will
412 // make no difference, but for consistency's sake
413 $new_def = clone $module->info[$name];
414
415 if (!$def && $new_def->standalone) {
416 $def = $new_def;
417 } elseif ($def) {
418 // This will occur even if $new_def is standalone. In practice,
419 // this will usually result in a full replacement.
420 $def->mergeIn($new_def);
421 } else {
422 // :TODO:
423 // non-standalone definitions that don't have a standalone
424 // to merge into could be deferred to the end
425 // HOWEVER, it is perfectly valid for a non-standalone
426 // definition to lack a standalone definition, even
427 // after all processing: this allows us to safely
428 // specify extra attributes for elements that may not be
429 // enabled all in one place. In particular, this might
430 // be the case for trusted elements. WARNING: care must
431 // be taken that the /extra/ definitions are all safe.
432 continue;
433 }
434
435 // attribute value expansions
436 $this->attrCollections->performInclusions($def->attr);
437 $this->attrCollections->expandIdentifiers($def->attr, $this->attrTypes);
438
439 // descendants_are_inline, for ChildDef_Chameleon
440 if (is_string($def->content_model) &&
441 strpos($def->content_model, 'Inline') !== false) {
442 if ($name != 'del' && $name != 'ins') {
443 // this is for you, ins/del
444 $def->descendants_are_inline = true;
445 }
446 }
447
448 $this->contentSets->generateChildDef($def, $module);
449 }
450
451 // This can occur if there is a blank definition, but no base to
452 // mix it in with
453 if (!$def) {
454 return false;
455 }
456
457 // add information on required attributes
458 foreach ($def->attr as $attr_name => $attr_def) {
459 if ($attr_def->required) {
460 $def->required_attr[] = $attr_name;
461 }
462 }
463 return $def;
464 }
465}
466
467// vim: et sw=4 sts=4
$n
Definition: RandomTest.php:85
An exception for terminatinating execution or to throw for unit testing.
Defines common attribute collections that modules reference.
Provides lookup array of attribute types to HTMLPurifier_AttrDef objects.
Definition: AttrTypes.php:7
$modules
Active instances of modules for the specified doctype are indexed, by name, in this array.
setup($config)
Performs processing on modules, after being called you may use getElement() and getElements()
getElement($name, $trusted=null)
Retrieves a single merged element definition.
addModule($module)
Adds a module to the current doctype by first registering it, and then tacking it on to the active do...
getElements()
Retrieves merged element definitions.
processModule($module)
Takes a module and adds it to the active module collection, registering it if necessary.
$attrCollections
@type HTMLPurifier_AttrCollections
$doctypes
@type HTMLPurifier_DoctypeRegistry
$elementLookup
Associative array of element name to list of modules that have definitions for the element; this arra...
$contentSets
@type HTMLPurifier_ContentSets
$doctype
Instance of current doctype.
$trusted
If set to true, unsafe elements and attributes will be allowed.
$registeredModules
Array of recognized HTMLPurifier_HTMLModule instances, indexed by module's class name.
registerModule($module, $overload=false)
Registers a module to the recognized module list, useful for overloading pre-existing modules.
$userModules
List of extra modules that were added by the user using addModule().
$prefixes
List of prefixes we should use for registering small names.
$attrTypes
@type HTMLPurifier_AttrTypes
addPrefix($prefix)
Adds a class prefix that registerModule() will use to resolve a string name to a concrete class.
$def
Definition: croninfo.php:21
$config
Definition: bootstrap.php:15
if($modEnd===false) $module
Definition: module.php:59