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https://github.com/ezyang/htmlpurifier.git
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e180b7689e
- Add extra protection in AttrDef_URI against phantom Schemes - Doctype moved from config to HTMLDefinition - AttrDef_URITest mocks have more generic object parameters to deal with PHP4's copy-happy behavior git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1089 48356398-32a2-884e-a903-53898d9a118a
345 lines
12 KiB
PHP
345 lines
12 KiB
PHP
<?php
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// components
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require_once 'HTMLPurifier/HTMLModuleManager.php';
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// this definition and its modules MUST NOT define configuration directives
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// outside of the HTML or Attr namespaces
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HTMLPurifier_ConfigSchema::define(
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'HTML', 'BlockWrapper', 'p', 'string', '
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<p>
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String name of element to wrap inline elements that are inside a block
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context. This only occurs in the children of blockquote in strict mode.
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</p>
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<p>
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Example: by default value,
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<code><blockquote>Foo</blockquote></code> would become
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<code><blockquote><p>Foo</p></blockquote></code>.
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The <code><p></code> tags can be replaced with whatever you desire,
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as long as it is a block level element. This directive has been available
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since 1.3.0.
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</p>
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');
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HTMLPurifier_ConfigSchema::define(
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'HTML', 'Parent', 'div', 'string', '
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<p>
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String name of element that HTML fragment passed to library will be
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inserted in. An interesting variation would be using span as the
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parent element, meaning that only inline tags would be allowed.
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This directive has been available since 1.3.0.
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</p>
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');
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HTMLPurifier_ConfigSchema::define(
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'HTML', 'AllowedElements', null, 'lookup/null', '
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<p>
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If HTML Purifier\'s tag set is unsatisfactory for your needs, you
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can overload it with your own list of tags to allow. Note that this
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method is subtractive: it does its job by taking away from HTML Purifier
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usual feature set, so you cannot add a tag that HTML Purifier never
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supported in the first place (like embed, form or head). If you
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change this, you probably also want to change %HTML.AllowedAttributes.
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</p>
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<p>
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<strong>Warning:</strong> If another directive conflicts with the
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elements here, <em>that</em> directive will win and override.
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This directive has been available since 1.3.0.
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</p>
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');
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HTMLPurifier_ConfigSchema::define(
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'HTML', 'AllowedAttributes', null, 'lookup/null', '
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<p>
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If HTML Purifier\'s attribute set is unsatisfactory, overload it!
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The syntax is "tag.attr" or "*.attr" for the global attributes
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(style, id, class, dir, lang, xml:lang).
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</p>
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<p>
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<strong>Warning:</strong> If another directive conflicts with the
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elements here, <em>that</em> directive will win and override. For
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example, %HTML.EnableAttrID will take precedence over *.id in this
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directive. You must set that directive to true before you can use
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IDs at all. This directive has been available since 1.3.0.
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</p>
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');
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/**
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* Definition of the purified HTML that describes allowed children,
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* attributes, and many other things.
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*
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* Conventions:
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*
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* All member variables that are prefixed with info
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* (including the main $info array) are used by HTML Purifier internals
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* and should not be directly edited when customizing the HTMLDefinition.
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* They can usually be set via configuration directives or custom
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* modules.
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*
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* On the other hand, member variables without the info prefix are used
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* internally by the HTMLDefinition and MUST NOT be used by other HTML
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* Purifier internals. Many of them, however, are public, and may be
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* edited by userspace code to tweak the behavior of HTMLDefinition.
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*
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* HTMLPurifier_Printer_HTMLDefinition is a notable exception to this
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* rule: in the interest of comprehensiveness, it will sniff everything.
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*/
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class HTMLPurifier_HTMLDefinition
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{
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/** FULLY-PUBLIC VARIABLES */
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/**
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* Associative array of element names to HTMLPurifier_ElementDef
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* @public
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*/
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var $info = array();
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/**
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* Associative array of global attribute name to attribute definition.
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* @public
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*/
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var $info_global_attr = array();
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/**
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* String name of parent element HTML will be going into.
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* @public
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*/
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var $info_parent = 'div';
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/**
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* Definition for parent element, allows parent element to be a
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* tag that's not allowed inside the HTML fragment.
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* @public
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*/
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var $info_parent_def;
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/**
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* String name of element used to wrap inline elements in block context
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* @note This is rarely used except for BLOCKQUOTEs in strict mode
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* @public
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*/
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var $info_block_wrapper = 'p';
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/**
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* Associative array of deprecated tag name to HTMLPurifier_TagTransform
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* @public
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*/
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var $info_tag_transform = array();
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/**
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* Indexed list of HTMLPurifier_AttrTransform to be performed before validation.
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* @public
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*/
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var $info_attr_transform_pre = array();
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/**
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* Indexed list of HTMLPurifier_AttrTransform to be performed after validation.
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* @public
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*/
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var $info_attr_transform_post = array();
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/**
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* Nested lookup array of content set name (Block, Inline) to
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* element name to whether or not it belongs in that content set.
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* @public
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*/
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var $info_content_sets = array();
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/**
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* Doctype object
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*/
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var $doctype;
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/** PUBLIC BUT INTERNAL VARIABLES */
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var $setup = false; /**< Has setup() been called yet? */
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var $config; /**< Temporary instance of HTMLPurifier_Config */
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var $manager; /**< Instance of HTMLPurifier_HTMLModuleManager */
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/**
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* Performs low-cost, preliminary initialization.
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* @param $config Instance of HTMLPurifier_Config
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*/
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function HTMLPurifier_HTMLDefinition($config) {
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$this->config = $config;
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$this->manager = new HTMLPurifier_HTMLModuleManager();
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}
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/**
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* Retrieve definition object from cache
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*/
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function getCache($config) {
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static $cache = array();
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$file = HTMLPurifier_HTMLDefinition::getCacheFile($config);
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if (isset($cache[$file])) return $cache[$file]; // unit test optimization
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if (!file_exists($file)) return false;
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$cache[$file] = unserialize(file_get_contents($file));
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return $cache[$file];
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}
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/**
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* Determines a cache key identifier for a particular configuration
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*/
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function getCacheKey($config) {
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return md5(serialize(array($config->getBatch('HTML'), $config->getBatch('Attr'))));
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}
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/**
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* Determines file a particular configuration's definition is stored in
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*/
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function getCacheFile($config) {
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$key = HTMLPurifier_HTMLDefinition::getCacheKey($config);
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return dirname(__FILE__) . '/HTMLDefinition/' . $key . '.ser';
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}
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/**
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* Saves HTMLDefinition to cache
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*/
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function saveCache($config) {
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$file = $this->getCacheFile($config);
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$contents = serialize($this);
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$fh = fopen($file, 'w');
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fwrite($fh, $contents);
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fclose($fh);
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}
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/**
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* Processes internals into form usable by HTMLPurifier internals.
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* Modifying the definition after calling this function should not
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* be done.
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*/
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function setup() {
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// multiple call guard
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if ($this->setup) {return;} else {$this->setup = true;}
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$this->processModules();
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$this->setupConfigStuff();
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// remove complicated variables to ease serialization
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unset($this->config);
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unset($this->manager);
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}
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/**
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* Extract out the information from the manager
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*/
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function processModules() {
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$this->manager->setup($this->config);
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$this->doctype = $this->manager->doctype;
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foreach ($this->manager->modules as $module) {
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foreach($module->info_tag_transform as $k => $v) {
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if ($v === false) unset($this->info_tag_transform[$k]);
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else $this->info_tag_transform[$k] = $v;
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}
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foreach($module->info_attr_transform_pre as $k => $v) {
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if ($v === false) unset($this->info_attr_transform_pre[$k]);
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else $this->info_attr_transform_pre[$k] = $v;
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}
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foreach($module->info_attr_transform_post as $k => $v) {
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if ($v === false) unset($this->info_attr_transform_post[$k]);
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else $this->info_attr_transform_post[$k] = $v;
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}
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}
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$this->info = $this->manager->getElements();
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$this->info_content_sets = $this->manager->contentSets->lookup;
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}
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/**
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* Sets up stuff based on config. We need a better way of doing this.
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*/
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function setupConfigStuff() {
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$block_wrapper = $this->config->get('HTML', 'BlockWrapper');
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if (isset($this->info_content_sets['Block'][$block_wrapper])) {
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$this->info_block_wrapper = $block_wrapper;
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} else {
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trigger_error('Cannot use non-block element as block wrapper.',
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E_USER_ERROR);
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}
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$parent = $this->config->get('HTML', 'Parent');
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$def = $this->manager->getElement($parent, true);
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if ($def) {
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$this->info_parent = $parent;
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$this->info_parent_def = $def;
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} else {
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trigger_error('Cannot use unrecognized element as parent.',
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E_USER_ERROR);
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$this->info_parent_def = $this->manager->getElement($this->info_parent, true);
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}
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// support template text
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$support = "(for information on implementing this, see the ".
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"support forums) ";
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// setup allowed elements, SubtractiveWhitelist module(?)
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$allowed_elements = $this->config->get('HTML', 'AllowedElements');
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if (is_array($allowed_elements)) {
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foreach ($this->info as $name => $d) {
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if(!isset($allowed_elements[$name])) unset($this->info[$name]);
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unset($allowed_elements[$name]);
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}
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// emit errors
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foreach ($allowed_elements as $element => $d) {
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$element = htmlspecialchars($element);
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trigger_error("Element '$element' is not supported $support", E_USER_WARNING);
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}
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}
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$allowed_attributes = $this->config->get('HTML', 'AllowedAttributes');
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$allowed_attributes_mutable = $allowed_attributes; // by copy!
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if (is_array($allowed_attributes)) {
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foreach ($this->info_global_attr as $attr_key => $info) {
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if (!isset($allowed_attributes["*.$attr_key"])) {
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unset($this->info_global_attr[$attr_key]);
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} elseif (isset($allowed_attributes_mutable["*.$attr_key"])) {
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unset($allowed_attributes_mutable["*.$attr_key"]);
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}
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}
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foreach ($this->info as $tag => $info) {
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foreach ($info->attr as $attr => $attr_info) {
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if (!isset($allowed_attributes["$tag.$attr"]) &&
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!isset($allowed_attributes["*.$attr"])) {
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unset($this->info[$tag]->attr[$attr]);
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} else {
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if (isset($allowed_attributes_mutable["$tag.$attr"])) {
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unset($allowed_attributes_mutable["$tag.$attr"]);
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} elseif (isset($allowed_attributes_mutable["*.$attr"])) {
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unset($allowed_attributes_mutable["*.$attr"]);
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}
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}
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}
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}
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// emit errors
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foreach ($allowed_attributes_mutable as $elattr => $d) {
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list($element, $attribute) = explode('.', $elattr);
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$element = htmlspecialchars($element);
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$attribute = htmlspecialchars($attribute);
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if ($element == '*') {
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trigger_error("Global attribute '$attribute' is not ".
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"supported in any elements $support",
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E_USER_WARNING);
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} else {
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trigger_error("Attribute '$attribute' in element '$element' not supported $support",
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E_USER_WARNING);
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}
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}
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}
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}
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}
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?>
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