--- /dev/null
+<?php
+
+/**
+ * Definition of the purified HTML that describes allowed children,
+ * attributes, and many other things.
+ *
+ * Conventions:
+ *
+ * All member variables that are prefixed with info
+ * (including the main $info array) are used by HTML Purifier internals
+ * and should not be directly edited when customizing the HTMLDefinition.
+ * They can usually be set via configuration directives or custom
+ * modules.
+ *
+ * On the other hand, member variables without the info prefix are used
+ * internally by the HTMLDefinition and MUST NOT be used by other HTML
+ * Purifier internals. Many of them, however, are public, and may be
+ * edited by userspace code to tweak the behavior of HTMLDefinition.
+ *
+ * @note This class is inspected by Printer_HTMLDefinition; please
+ * update that class if things here change.
+ *
+ * @warning Directives that change this object's structure must be in
+ * the HTML or Attr namespace!
+ */
+class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
+{
+
+ // FULLY-PUBLIC VARIABLES ---------------------------------------------
+
+ /**
+ * Associative array of element names to HTMLPurifier_ElementDef
+ */
+ public $info = array();
+
+ /**
+ * Associative array of global attribute name to attribute definition.
+ */
+ public $info_global_attr = array();
+
+ /**
+ * String name of parent element HTML will be going into.
+ */
+ public $info_parent = 'div';
+
+ /**
+ * Definition for parent element, allows parent element to be a
+ * tag that's not allowed inside the HTML fragment.
+ */
+ public $info_parent_def;
+
+ /**
+ * String name of element used to wrap inline elements in block context
+ * @note This is rarely used except for BLOCKQUOTEs in strict mode
+ */
+ public $info_block_wrapper = 'p';
+
+ /**
+ * Associative array of deprecated tag name to HTMLPurifier_TagTransform
+ */
+ public $info_tag_transform = array();
+
+ /**
+ * Indexed list of HTMLPurifier_AttrTransform to be performed before validation.
+ */
+ public $info_attr_transform_pre = array();
+
+ /**
+ * Indexed list of HTMLPurifier_AttrTransform to be performed after validation.
+ */
+ public $info_attr_transform_post = array();
+
+ /**
+ * Nested lookup array of content set name (Block, Inline) to
+ * element name to whether or not it belongs in that content set.
+ */
+ public $info_content_sets = array();
+
+ /**
+ * Indexed list of HTMLPurifier_Injector to be used.
+ */
+ public $info_injector = array();
+
+ /**
+ * Doctype object
+ */
+ public $doctype;
+
+
+
+ // RAW CUSTOMIZATION STUFF --------------------------------------------
+
+ /**
+ * Adds a custom attribute to a pre-existing element
+ * @note This is strictly convenience, and does not have a corresponding
+ * method in HTMLPurifier_HTMLModule
+ * @param $element_name String element name to add attribute to
+ * @param $attr_name String name of attribute
+ * @param $def Attribute definition, can be string or object, see
+ * HTMLPurifier_AttrTypes for details
+ */
+ public function addAttribute($element_name, $attr_name, $def) {
+ $module = $this->getAnonymousModule();
+ if (!isset($module->info[$element_name])) {
+ $element = $module->addBlankElement($element_name);
+ } else {
+ $element = $module->info[$element_name];
+ }
+ $element->attr[$attr_name] = $def;
+ }
+
+ /**
+ * Adds a custom element to your HTML definition
+ * @note See HTMLPurifier_HTMLModule::addElement for detailed
+ * parameter and return value descriptions.
+ */
+ public function addElement($element_name, $type, $contents, $attr_collections, $attributes = array()) {
+ $module = $this->getAnonymousModule();
+ // assume that if the user is calling this, the element
+ // is safe. This may not be a good idea
+ $element = $module->addElement($element_name, $type, $contents, $attr_collections, $attributes);
+ return $element;
+ }
+
+ /**
+ * Adds a blank element to your HTML definition, for overriding
+ * existing behavior
+ * @note See HTMLPurifier_HTMLModule::addBlankElement for detailed
+ * parameter and return value descriptions.
+ */
+ public function addBlankElement($element_name) {
+ $module = $this->getAnonymousModule();
+ $element = $module->addBlankElement($element_name);
+ return $element;
+ }
+
+ /**
+ * Retrieves a reference to the anonymous module, so you can
+ * bust out advanced features without having to make your own
+ * module.
+ */
+ public function getAnonymousModule() {
+ if (!$this->_anonModule) {
+ $this->_anonModule = new HTMLPurifier_HTMLModule();
+ $this->_anonModule->name = 'Anonymous';
+ }
+ return $this->_anonModule;
+ }
+
+ private $_anonModule;
+
+
+ // PUBLIC BUT INTERNAL VARIABLES --------------------------------------
+
+ public $type = 'HTML';
+ public $manager; /**< Instance of HTMLPurifier_HTMLModuleManager */
+
+ /**
+ * Performs low-cost, preliminary initialization.
+ */
+ public function __construct() {
+ $this->manager = new HTMLPurifier_HTMLModuleManager();
+ }
+
+ protected function doSetup($config) {
+ $this->processModules($config);
+ $this->setupConfigStuff($config);
+ unset($this->manager);
+
+ // cleanup some of the element definitions
+ foreach ($this->info as $k => $v) {
+ unset($this->info[$k]->content_model);
+ unset($this->info[$k]->content_model_type);
+ }
+ }
+
+ /**
+ * Extract out the information from the manager
+ */
+ protected function processModules($config) {
+
+ if ($this->_anonModule) {
+ // for user specific changes
+ // this is late-loaded so we don't have to deal with PHP4
+ // reference wonky-ness
+ $this->manager->addModule($this->_anonModule);
+ unset($this->_anonModule);
+ }
+
+ $this->manager->setup($config);
+ $this->doctype = $this->manager->doctype;
+
+ foreach ($this->manager->modules as $module) {
+ foreach($module->info_tag_transform as $k => $v) {
+ if ($v === false) unset($this->info_tag_transform[$k]);
+ else $this->info_tag_transform[$k] = $v;
+ }
+ foreach($module->info_attr_transform_pre as $k => $v) {
+ if ($v === false) unset($this->info_attr_transform_pre[$k]);
+ else $this->info_attr_transform_pre[$k] = $v;
+ }
+ foreach($module->info_attr_transform_post as $k => $v) {
+ if ($v === false) unset($this->info_attr_transform_post[$k]);
+ else $this->info_attr_transform_post[$k] = $v;
+ }
+ foreach ($module->info_injector as $k => $v) {
+ if ($v === false) unset($this->info_injector[$k]);
+ else $this->info_injector[$k] = $v;
+ }
+ }
+
+ $this->info = $this->manager->getElements();
+ $this->info_content_sets = $this->manager->contentSets->lookup;
+
+ }
+
+ /**
+ * Sets up stuff based on config. We need a better way of doing this.
+ */
+ protected function setupConfigStuff($config) {
+
+ $block_wrapper = $config->get('HTML.BlockWrapper');
+ if (isset($this->info_content_sets['Block'][$block_wrapper])) {
+ $this->info_block_wrapper = $block_wrapper;
+ } else {
+ trigger_error('Cannot use non-block element as block wrapper',
+ E_USER_ERROR);
+ }
+
+ $parent = $config->get('HTML.Parent');
+ $def = $this->manager->getElement($parent, true);
+ if ($def) {
+ $this->info_parent = $parent;
+ $this->info_parent_def = $def;
+ } else {
+ trigger_error('Cannot use unrecognized element as parent',
+ E_USER_ERROR);
+ $this->info_parent_def = $this->manager->getElement($this->info_parent, true);
+ }
+
+ // support template text
+ $support = "(for information on implementing this, see the ".
+ "support forums) ";
+
+ // setup allowed elements -----------------------------------------
+
+ $allowed_elements = $config->get('HTML.AllowedElements');
+ $allowed_attributes = $config->get('HTML.AllowedAttributes'); // retrieve early
+
+ if (!is_array($allowed_elements) && !is_array($allowed_attributes)) {
+ $allowed = $config->get('HTML.Allowed');
+ if (is_string($allowed)) {
+ list($allowed_elements, $allowed_attributes) = $this->parseTinyMCEAllowedList($allowed);
+ }
+ }
+
+ if (is_array($allowed_elements)) {
+ foreach ($this->info as $name => $d) {
+ if(!isset($allowed_elements[$name])) unset($this->info[$name]);
+ unset($allowed_elements[$name]);
+ }
+ // emit errors
+ foreach ($allowed_elements as $element => $d) {
+ $element = htmlspecialchars($element); // PHP doesn't escape errors, be careful!
+ trigger_error("Element '$element' is not supported $support", E_USER_WARNING);
+ }
+ }
+
+ // setup allowed attributes ---------------------------------------
+
+ $allowed_attributes_mutable = $allowed_attributes; // by copy!
+ if (is_array($allowed_attributes)) {
+
+ // This actually doesn't do anything, since we went away from
+ // global attributes. It's possible that userland code uses
+ // it, but HTMLModuleManager doesn't!
+ foreach ($this->info_global_attr as $attr => $x) {
+ $keys = array($attr, "*@$attr", "*.$attr");
+ $delete = true;
+ foreach ($keys as $key) {
+ if ($delete && isset($allowed_attributes[$key])) {
+ $delete = false;
+ }
+ if (isset($allowed_attributes_mutable[$key])) {
+ unset($allowed_attributes_mutable[$key]);
+ }
+ }
+ if ($delete) unset($this->info_global_attr[$attr]);
+ }
+
+ foreach ($this->info as $tag => $info) {
+ foreach ($info->attr as $attr => $x) {
+ $keys = array("$tag@$attr", $attr, "*@$attr", "$tag.$attr", "*.$attr");
+ $delete = true;
+ foreach ($keys as $key) {
+ if ($delete && isset($allowed_attributes[$key])) {
+ $delete = false;
+ }
+ if (isset($allowed_attributes_mutable[$key])) {
+ unset($allowed_attributes_mutable[$key]);
+ }
+ }
+ if ($delete) unset($this->info[$tag]->attr[$attr]);
+ }
+ }
+ // emit errors
+ foreach ($allowed_attributes_mutable as $elattr => $d) {
+ $bits = preg_split('/[.@]/', $elattr, 2);
+ $c = count($bits);
+ switch ($c) {
+ case 2:
+ if ($bits[0] !== '*') {
+ $element = htmlspecialchars($bits[0]);
+ $attribute = htmlspecialchars($bits[1]);
+ if (!isset($this->info[$element])) {
+ trigger_error("Cannot allow attribute '$attribute' if element '$element' is not allowed/supported $support");
+ } else {
+ trigger_error("Attribute '$attribute' in element '$element' not supported $support",
+ E_USER_WARNING);
+ }
+ break;
+ }
+ // otherwise fall through
+ case 1:
+ $attribute = htmlspecialchars($bits[0]);
+ trigger_error("Global attribute '$attribute' is not ".
+ "supported in any elements $support",
+ E_USER_WARNING);
+ break;
+ }
+ }
+
+ }
+
+ // setup forbidden elements ---------------------------------------
+
+ $forbidden_elements = $config->get('HTML.ForbiddenElements');
+ $forbidden_attributes = $config->get('HTML.ForbiddenAttributes');
+
+ foreach ($this->info as $tag => $info) {
+ if (isset($forbidden_elements[$tag])) {
+ unset($this->info[$tag]);
+ continue;
+ }
+ foreach ($info->attr as $attr => $x) {
+ if (
+ isset($forbidden_attributes["$tag@$attr"]) ||
+ isset($forbidden_attributes["*@$attr"]) ||
+ isset($forbidden_attributes[$attr])
+ ) {
+ unset($this->info[$tag]->attr[$attr]);
+ continue;
+ } // this segment might get removed eventually
+ elseif (isset($forbidden_attributes["$tag.$attr"])) {
+ // $tag.$attr are not user supplied, so no worries!
+ trigger_error("Error with $tag.$attr: tag.attr syntax not supported for HTML.ForbiddenAttributes; use tag@attr instead", E_USER_WARNING);
+ }
+ }
+ }
+ foreach ($forbidden_attributes as $key => $v) {
+ if (strlen($key) < 2) continue;
+ if ($key[0] != '*') continue;
+ if ($key[1] == '.') {
+ trigger_error("Error with $key: *.attr syntax not supported for HTML.ForbiddenAttributes; use attr instead", E_USER_WARNING);
+ }
+ }
+
+ // setup injectors -----------------------------------------------------
+ foreach ($this->info_injector as $i => $injector) {
+ if ($injector->checkNeeded($config) !== false) {
+ // remove injector that does not have it's required
+ // elements/attributes present, and is thus not needed.
+ unset($this->info_injector[$i]);
+ }
+ }
+ }
+
+ /**
+ * Parses a TinyMCE-flavored Allowed Elements and Attributes list into
+ * separate lists for processing. Format is element[attr1|attr2],element2...
+ * @warning Although it's largely drawn from TinyMCE's implementation,
+ * it is different, and you'll probably have to modify your lists
+ * @param $list String list to parse
+ * @param array($allowed_elements, $allowed_attributes)
+ * @todo Give this its own class, probably static interface
+ */
+ public function parseTinyMCEAllowedList($list) {
+
+ $list = str_replace(array(' ', "\t"), '', $list);
+
+ $elements = array();
+ $attributes = array();
+
+ $chunks = preg_split('/(,|[\n\r]+)/', $list);
+ foreach ($chunks as $chunk) {
+ if (empty($chunk)) continue;
+ // remove TinyMCE element control characters
+ if (!strpos($chunk, '[')) {
+ $element = $chunk;
+ $attr = false;
+ } else {
+ list($element, $attr) = explode('[', $chunk);
+ }
+ if ($element !== '*') $elements[$element] = true;
+ if (!$attr) continue;
+ $attr = substr($attr, 0, strlen($attr) - 1); // remove trailing ]
+ $attr = explode('|', $attr);
+ foreach ($attr as $key) {
+ $attributes["$element.$key"] = true;
+ }
+ }
+
+ return array($elements, $attributes);
+
+ }
+
+
+}
+
+// vim: et sw=4 sts=4
projects / friendica.git / blobdiff