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+<?php
+
+class HTMLPurifier_HTMLModuleManager
+{
+
+ /**
+ * Instance of HTMLPurifier_DoctypeRegistry
+ */
+ public $doctypes;
+
+ /**
+ * Instance of current doctype
+ */
+ public $doctype;
+
+ /**
+ * Instance of HTMLPurifier_AttrTypes
+ */
+ public $attrTypes;
+
+ /**
+ * Active instances of modules for the specified doctype are
+ * indexed, by name, in this array.
+ */
+ public $modules = array();
+
+ /**
+ * Array of recognized HTMLPurifier_Module 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.
+ */
+ 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.
+ */
+ public $userModules = array();
+
+ /**
+ * Associative array of element name to list of modules that have
+ * definitions for the element; this array is dynamically filled.
+ */
+ public $elementLookup = array();
+
+ /** List of prefixes we should use for registering small names */
+ public $prefixes = array('HTMLPurifier_HTMLModule_');
+
+ public $contentSets; /**< Instance of HTMLPurifier_ContentSets */
+ public $attrCollections; /**< Instance of HTMLPurifier_AttrCollections */
+
+ /** If set to true, unsafe elements and attributes will be allowed */
+ 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 $config Instance of HTMLPurifier_Config
+ */
+ public function setup($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.Nofollow')) {
+ $modules[] = 'Nofollow';
+ }
+ if ($config->get('HTML.TargetBlank')) {
+ $modules[] = 'TargetBlank';
+ }
+
+ // 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 $i => $injector) {
+ if (!is_object($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 $name Name of element
+ * @param $trusted Boolean trusted overriding parameter: set to true
+ * if you want the full version of an element
+ * @return Merged HTMLPurifier_ElementDef
+ * @note You may notice that modules are getting iterated over twice (once
+ * in getElements() and once here). This
+ * is because
+ */
+ public function getElement($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
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 08:41:17 +0000