You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
468 lines
16 KiB
468 lines
16 KiB
11 months ago
|
<?php
|
||
|
|
|
||
|
|
class HTMLPurifier_HTMLModuleManager
|
||
|
|
{
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @type HTMLPurifier_DoctypeRegistry
|
||
|
|
*/
|
||
|
|
public $doctypes;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Instance of current doctype.
|
||
|
|
* @type string
|
||
|
|
*/
|
||
|
|
public $doctype;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @type HTMLPurifier_AttrTypes
|
||
|
|
*/
|
||
|
|
public $attrTypes;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Active instances of modules for the specified doctype are
|
||
|
|
* indexed, by name, in this array.
|
||
|
|
* @type HTMLPurifier_HTMLModule[]
|
||
|
|
*/
|
||
|
|
public $modules = array();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Array of recognized HTMLPurifier_HTMLModule instances,
|
||
|
|
* indexed by module's class name. This array is usually lazy loaded, but a
|
||
|
|
* user can overload a module by pre-emptively registering it.
|
||
|
|
* @type HTMLPurifier_HTMLModule[]
|
||
|
|
*/
|
||
|
|
public $registeredModules = array();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* List of extra modules that were added by the user
|
||
|
|
* using addModule(). These get unconditionally merged into the current doctype, whatever
|
||
|
|
* it may be.
|
||
|
|
* @type HTMLPurifier_HTMLModule[]
|
||
|
|
*/
|
||
|
|
public $userModules = array();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Associative array of element name to list of modules that have
|
||
|
|
* definitions for the element; this array is dynamically filled.
|
||
|
|
* @type array
|
||
|
|
*/
|
||
|
|
public $elementLookup = array();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* List of prefixes we should use for registering small names.
|
||
|
|
* @type array
|
||
|
|
*/
|
||
|
|
public $prefixes = array('HTMLPurifier_HTMLModule_');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @type HTMLPurifier_ContentSets
|
||
|
|
*/
|
||
|
|
public $contentSets;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @type HTMLPurifier_AttrCollections
|
||
|
|
*/
|
||
|
|
public $attrCollections;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* If set to true, unsafe elements and attributes will be allowed.
|
||
|
|
* @type bool
|
||
|
|
*/
|
||
|
|
public $trusted = false;
|
||
|
|
|
||
|
|
public function __construct()
|
||
|
|
{
|
||
|
|
// editable internal objects
|
||
|
|
$this->attrTypes = new HTMLPurifier_AttrTypes();
|
||
|
|
$this->doctypes = new HTMLPurifier_DoctypeRegistry();
|
||
|
|
|
||
|
|
// setup basic modules
|
||
|
|
$common = array(
|
||
|
|
'CommonAttributes', 'Text', 'Hypertext', 'List',
|
||
|
|
'Presentation', 'Edit', 'Bdo', 'Tables', 'Image',
|
||
|
|
'StyleAttribute',
|
||
|
|
// Unsafe:
|
||
|
|
'Scripting', 'Object', 'Forms',
|
||
|
|
// Sorta legacy, but present in strict:
|
||
|
|
'Name',
|
||
|
|
);
|
||
|
|
$transitional = array('Legacy', 'Target', 'Iframe');
|
||
|
|
$xml = array('XMLCommonAttributes');
|
||
|
|
$non_xml = array('NonXMLCommonAttributes');
|
||
|
|
|
||
|
|
// setup basic doctypes
|
||
|
|
$this->doctypes->register(
|
||
|
|
'HTML 4.01 Transitional',
|
||
|
|
false,
|
||
|
|
array_merge($common, $transitional, $non_xml),
|
||
|
|
array('Tidy_Transitional', 'Tidy_Proprietary'),
|
||
|
|
array(),
|
||
|
|
'-//W3C//DTD HTML 4.01 Transitional//EN',
|
||
|
|
'http://www.w3.org/TR/html4/loose.dtd'
|
||
|
|
);
|
||
|
|
|
||
|
|
$this->doctypes->register(
|
||
|
|
'HTML 4.01 Strict',
|
||
|
|
false,
|
||
|
|
array_merge($common, $non_xml),
|
||
|
|
array('Tidy_Strict', 'Tidy_Proprietary', 'Tidy_Name'),
|
||
|
|
array(),
|
||
|
|
'-//W3C//DTD HTML 4.01//EN',
|
||
|
|
'http://www.w3.org/TR/html4/strict.dtd'
|
||
|
|
);
|
||
|
|
|
||
|
|
$this->doctypes->register(
|
||
|
|
'XHTML 1.0 Transitional',
|
||
|
|
true,
|
||
|
|
array_merge($common, $transitional, $xml, $non_xml),
|
||
|
|
array('Tidy_Transitional', 'Tidy_XHTML', 'Tidy_Proprietary', 'Tidy_Name'),
|
||
|
|
array(),
|
||
|
|
'-//W3C//DTD XHTML 1.0 Transitional//EN',
|
||
|
|
'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'
|
||
|
|
);
|
||
|
|
|
||
|
|
$this->doctypes->register(
|
||
|
|
'XHTML 1.0 Strict',
|
||
|
|
true,
|
||
|
|
array_merge($common, $xml, $non_xml),
|
||
|
|
array('Tidy_Strict', 'Tidy_XHTML', 'Tidy_Strict', 'Tidy_Proprietary', 'Tidy_Name'),
|
||
|
|
array(),
|
||
|
|
'-//W3C//DTD XHTML 1.0 Strict//EN',
|
||
|
|
'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'
|
||
|
|
);
|
||
|
|
|
||
|
|
$this->doctypes->register(
|
||
|
|
'XHTML 1.1',
|
||
|
|
true,
|
||
|
|
// Iframe is a real XHTML 1.1 module, despite being
|
||
|
|
// "transitional"!
|
||
|
|
array_merge($common, $xml, array('Ruby', 'Iframe')),
|
||
|
|
array('Tidy_Strict', 'Tidy_XHTML', 'Tidy_Proprietary', 'Tidy_Strict', 'Tidy_Name'), // Tidy_XHTML1_1
|
||
|
|
array(),
|
||
|
|
'-//W3C//DTD XHTML 1.1//EN',
|
||
|
|
'http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd'
|
||
|
|
);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Registers a module to the recognized module list, useful for
|
||
|
|
* overloading pre-existing modules.
|
||
|
|
* @param $module Mixed: string module name, with or without
|
||
|
|
* HTMLPurifier_HTMLModule prefix, or instance of
|
||
|
|
* subclass of HTMLPurifier_HTMLModule.
|
||
|
|
* @param $overload Boolean whether or not to overload previous modules.
|
||
|
|
* If this is not set, and you do overload a module,
|
||
|
|
* HTML Purifier will complain with a warning.
|
||
|
|
* @note This function will not call autoload, you must instantiate
|
||
|
|
* (and thus invoke) autoload outside the method.
|
||
|
|
* @note If a string is passed as a module name, different variants
|
||
|
|
* will be tested in this order:
|
||
|
|
* - Check for HTMLPurifier_HTMLModule_$name
|
||
|
|
* - Check all prefixes with $name in order they were added
|
||
|
|
* - Check for literal object name
|
||
|
|
* - Throw fatal error
|
||
|
|
* If your object name collides with an internal class, specify
|
||
|
|
* your module manually. All modules must have been included
|
||
|
|
* externally: registerModule will not perform inclusions for you!
|
||
|
|
*/
|
||
|
|
public function registerModule($module, $overload = false)
|
||
|
|
{
|
||
|
|
if (is_string($module)) {
|
||
|
|
// attempt to load the module
|
||
|
|
$original_module = $module;
|
||
|
|
$ok = false;
|
||
|
|
foreach ($this->prefixes as $prefix) {
|
||
|
|
$module = $prefix . $original_module;
|
||
|
|
if (class_exists($module)) {
|
||
|
|
$ok = true;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!$ok) {
|
||
|
|
$module = $original_module;
|
||
|
|
if (!class_exists($module)) {
|
||
|
|
trigger_error(
|
||
|
|
$original_module . ' module does not exist',
|
||
|
|
E_USER_ERROR
|
||
|
|
);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$module = new $module();
|
||
|
|
}
|
||
|
|
if (empty($module->name)) {
|
||
|
|
trigger_error('Module instance of ' . get_class($module) . ' must have name');
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (!$overload && isset($this->registeredModules[$module->name])) {
|
||
|
|
trigger_error('Overloading ' . $module->name . ' without explicit overload parameter', E_USER_WARNING);
|
||
|
|
}
|
||
|
|
$this->registeredModules[$module->name] = $module;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds a module to the current doctype by first registering it,
|
||
|
|
* and then tacking it on to the active doctype
|
||
|
|
*/
|
||
|
|
public function addModule($module)
|
||
|
|
{
|
||
|
|
$this->registerModule($module);
|
||
|
|
if (is_object($module)) {
|
||
|
|
$module = $module->name;
|
||
|
|
}
|
||
|
|
$this->userModules[] = $module;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds a class prefix that registerModule() will use to resolve a
|
||
|
|
* string name to a concrete class
|
||
|
|
*/
|
||
|
|
public function addPrefix($prefix)
|
||
|
|
{
|
||
|
|
$this->prefixes[] = $prefix;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Performs processing on modules, after being called you may
|
||
|
|
* use getElement() and getElements()
|
||
|
|
* @param HTMLPurifier_Config $config
|
||
|
|
*/
|
||
|
|
public function setup($config)
|
||
|
|
{
|
||
|
|
$this->trusted = $config->get('HTML.Trusted');
|
||
|
|
|
||
|
|
// generate
|
||
|
|
$this->doctype = $this->doctypes->make($config);
|
||
|
|
$modules = $this->doctype->modules;
|
||
|
|
|
||
|
|
// take out the default modules that aren't allowed
|
||
|
|
$lookup = $config->get('HTML.AllowedModules');
|
||
|
|
$special_cases = $config->get('HTML.CoreModules');
|
||
|
|
|
||
|
|
if (is_array($lookup)) {
|
||
|
|
foreach ($modules as $k => $m) {
|
||
|
|
if (isset($special_cases[$m])) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (!isset($lookup[$m])) {
|
||
|
|
unset($modules[$k]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// custom modules
|
||
|
|
if ($config->get('HTML.Proprietary')) {
|
||
|
|
$modules[] = 'Proprietary';
|
||
|
|
}
|
||
|
|
if ($config->get('HTML.SafeObject')) {
|
||
|
|
$modules[] = 'SafeObject';
|
||
|
|
}
|
||
|
|
if ($config->get('HTML.SafeEmbed')) {
|
||
|
|
$modules[] = 'SafeEmbed';
|
||
|
|
}
|
||
|
|
if ($config->get('HTML.SafeScripting') !== array()) {
|
||
|
|
$modules[] = 'SafeScripting';
|
||
|
|
}
|
||
|
|
if ($config->get('HTML.Nofollow')) {
|
||
|
|
$modules[] = 'Nofollow';
|
||
|
|
}
|
||
|
|
if ($config->get('HTML.TargetBlank')) {
|
||
|
|
$modules[] = 'TargetBlank';
|
||
|
|
}
|
||
|
|
// NB: HTML.TargetNoreferrer and HTML.TargetNoopener must be AFTER HTML.TargetBlank
|
||
|
|
// so that its post-attr-transform gets run afterwards.
|
||
|
|
if ($config->get('HTML.TargetNoreferrer')) {
|
||
|
|
$modules[] = 'TargetNoreferrer';
|
||
|
|
}
|
||
|
|
if ($config->get('HTML.TargetNoopener')) {
|
||
|
|
$modules[] = 'TargetNoopener';
|
||
|
|
}
|
||
|
|
|
||
|
|
// merge in custom modules
|
||
|
|
$modules = array_merge($modules, $this->userModules);
|
||
|
|
|
||
|
|
foreach ($modules as $module) {
|
||
|
|
$this->processModule($module);
|
||
|
|
$this->modules[$module]->setup($config);
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach ($this->doctype->tidyModules as $module) {
|
||
|
|
$this->processModule($module);
|
||
|
|
$this->modules[$module]->setup($config);
|
||
|
|
}
|
||
|
|
|
||
|
|
// prepare any injectors
|
||
|
|
foreach ($this->modules as $module) {
|
||
|
|
$n = array();
|
||
|
|
foreach ($module->info_injector as $injector) {
|
||
|
|
if (!is_object($injector)) {
|
||
|
|
$class = "HTMLPurifier_Injector_$injector";
|
||
|
|
$injector = new $class;
|
||
|
|
}
|
||
|
|
$n[$injector->name] = $injector;
|
||
|
|
}
|
||
|
|
$module->info_injector = $n;
|
||
|
|
}
|
||
|
|
|
||
|
|
// setup lookup table based on all valid modules
|
||
|
|
foreach ($this->modules as $module) {
|
||
|
|
foreach ($module->info as $name => $def) {
|
||
|
|
if (!isset($this->elementLookup[$name])) {
|
||
|
|
$this->elementLookup[$name] = array();
|
||
|
|
}
|
||
|
|
$this->elementLookup[$name][] = $module->name;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// note the different choice
|
||
|
|
$this->contentSets = new HTMLPurifier_ContentSets(
|
||
|
|
// content set assembly deals with all possible modules,
|
||
|
|
// not just ones deemed to be "safe"
|
||
|
|
$this->modules
|
||
|
|
);
|
||
|
|
$this->attrCollections = new HTMLPurifier_AttrCollections(
|
||
|
|
$this->attrTypes,
|
||
|
|
// there is no way to directly disable a global attribute,
|
||
|
|
// but using AllowedAttributes or simply not including
|
||
|
|
// the module in your custom doctype should be sufficient
|
||
|
|
$this->modules
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Takes a module and adds it to the active module collection,
|
||
|
|
* registering it if necessary.
|
||
|
|
*/
|
||
|
|
public function processModule($module)
|
||
|
|
{
|
||
|
|
if (!isset($this->registeredModules[$module]) || is_object($module)) {
|
||
|
|
$this->registerModule($module);
|
||
|
|
}
|
||
|
|
$this->modules[$module] = $this->registeredModules[$module];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves merged element definitions.
|
||
|
|
* @return Array of HTMLPurifier_ElementDef
|
||
|
|
*/
|
||
|
|
public function getElements()
|
||
|
|
{
|
||
|
|
$elements = array();
|
||
|
|
foreach ($this->modules as $module) {
|
||
|
|
if (!$this->trusted && !$module->safe) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
foreach ($module->info as $name => $v) {
|
||
|
|
if (isset($elements[$name])) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
$elements[$name] = $this->getElement($name);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// remove dud elements, this happens when an element that
|
||
|
|
// appeared to be safe actually wasn't
|
||
|
|
foreach ($elements as $n => $v) {
|
||
|
|
if ($v === false) {
|
||
|
|
unset($elements[$n]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $elements;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves a single merged element definition
|
||
|
|
* @param string $name Name of element
|
||
|
|
* @param bool $trusted Boolean trusted overriding parameter: set to true
|
||
|
|
* if you want the full version of an element
|
||
|
|
* @return HTMLPurifier_ElementDef Merged HTMLPurifier_ElementDef
|
||
|
|
* @note You may notice that modules are getting iterated over twice (once
|
||
|
|
* in getElements() and once here). This
|
||
|
|
* is because
|
||
|
|
*/
|
||
|
|
public function getElement($name, $trusted = null)
|
||
|
|
{
|
||
|
|
if (!isset($this->elementLookup[$name])) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// setup global state variables
|
||
|
|
$def = false;
|
||
|
|
if ($trusted === null) {
|
||
|
|
$trusted = $this->trusted;
|
||
|
|
}
|
||
|
|
|
||
|
|
// iterate through each module that has registered itself to this
|
||
|
|
// element
|
||
|
|
foreach ($this->elementLookup[$name] as $module_name) {
|
||
|
|
$module = $this->modules[$module_name];
|
||
|
|
|
||
|
|
// refuse to create/merge from a module that is deemed unsafe--
|
||
|
|
// pretend the module doesn't exist--when trusted mode is not on.
|
||
|
|
if (!$trusted && !$module->safe) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// clone is used because, ideally speaking, the original
|
||
|
|
// definition should not be modified. Usually, this will
|
||
|
|
// make no difference, but for consistency's sake
|
||
|
|
$new_def = clone $module->info[$name];
|
||
|
|
|
||
|
|
if (!$def && $new_def->standalone) {
|
||
|
|
$def = $new_def;
|
||
|
|
} elseif ($def) {
|
||
|
|
// This will occur even if $new_def is standalone. In practice,
|
||
|
|
// this will usually result in a full replacement.
|
||
|
|
$def->mergeIn($new_def);
|
||
|
|
} else {
|
||
|
|
// :TODO:
|
||
|
|
// non-standalone definitions that don't have a standalone
|
||
|
|
// to merge into could be deferred to the end
|
||
|
|
// HOWEVER, it is perfectly valid for a non-standalone
|
||
|
|
// definition to lack a standalone definition, even
|
||
|
|
// after all processing: this allows us to safely
|
||
|
|
// specify extra attributes for elements that may not be
|
||
|
|
// enabled all in one place. In particular, this might
|
||
|
|
// be the case for trusted elements. WARNING: care must
|
||
|
|
// be taken that the /extra/ definitions are all safe.
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// attribute value expansions
|
||
|
|
$this->attrCollections->performInclusions($def->attr);
|
||
|
|
$this->attrCollections->expandIdentifiers($def->attr, $this->attrTypes);
|
||
|
|
|
||
|
|
// descendants_are_inline, for ChildDef_Chameleon
|
||
|
|
if (is_string($def->content_model) &&
|
||
|
|
strpos($def->content_model, 'Inline') !== false) {
|
||
|
|
if ($name != 'del' && $name != 'ins') {
|
||
|
|
// this is for you, ins/del
|
||
|
|
$def->descendants_are_inline = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->contentSets->generateChildDef($def, $module);
|
||
|
|
}
|
||
|
|
|
||
|
|
// This can occur if there is a blank definition, but no base to
|
||
|
|
// mix it in with
|
||
|
|
if (!$def) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// add information on required attributes
|
||
|
|
foreach ($def->attr as $attr_name => $attr_def) {
|
||
|
|
if ($attr_def->required) {
|
||
|
|
$def->required_attr[] = $attr_name;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return $def;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// vim: et sw=4 sts=4
|