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htmlpurifier
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HTMLPurifier
<?php /** * Validates the attributes of a token. Doesn't manage required attributes * very well. The only reason we factored this out was because RemoveForeignElements * also needed it besides ValidateAttributes. */ class HTMLPurifier_AttrValidator { /** * Validates the attributes of a token, returning a modified token * that has valid tokens. * * @param $token Reference to token to validate. We require a reference * because the operation this class performs on the token are * not atomic, so the context CurrentToken to be updated * throughout * @param $config Instance of HTMLPurifier_Config * @param $context Instance of HTMLPurifier_Context */ public function validateToken(&$token, &$config, $context) { $definition = $config->getHTMLDefinition(); $e = &$context->get('ErrorCollector', true); // initialize IDAccumulator if necessary $ok = &$context->get('IDAccumulator', true); if (!$ok) { $id_accumulator = HTMLPurifier_IDAccumulator::build($config, $context); $context->register('IDAccumulator', $id_accumulator); } // initialize CurrentToken if necessary $current_token = &$context->get('CurrentToken', true); if (!$current_token) { $context->register('CurrentToken', $token); } if ( !$token instanceof HTMLPurifier_Token_Start && !$token instanceof HTMLPurifier_Token_Empty ) { return $token; } // create alias to global definition array, see also $defs // DEFINITION CALL $d_defs = $definition->info_global_attr; // don't update token until the very end, to ensure an atomic update $attr = $token->attr; // do global transformations (pre) // nothing currently utilizes this foreach ($definition->info_attr_transform_pre as $transform) { $attr = $transform->transform($o = $attr, $config, $context); if ($e) { if ($attr != $o) { $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr); } } } // do local transformations only applicable to this element (pre) // ex. <p align="right"> to <p style="text-align:right;"> foreach ($definition->info[$token->name]->attr_transform_pre as $transform) { $attr = $transform->transform($o = $attr, $config, $context); if ($e) { if ($attr != $o) { $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr); } } } // create alias to this element's attribute definition array, see // also $d_defs (global attribute definition array) // DEFINITION CALL $defs = $definition->info[$token->name]->attr; $attr_key = false; $context->register('CurrentAttr', $attr_key); // iterate through all the attribute keypairs // Watch out for name collisions: $key has previously been used foreach ($attr as $attr_key => $value) { // call the definition if (isset($defs[$attr_key])) { // there is a local definition defined if ($defs[$attr_key] === false) { // We've explicitly been told not to allow this element. // This is usually when there's a global definition // that must be overridden. // Theoretically speaking, we could have a // AttrDef_DenyAll, but this is faster! $result = false; } else { // validate according to the element's definition $result = $defs[$attr_key]->validate( $value, $config, $context ); } } elseif (isset($d_defs[$attr_key])) { // there is a global definition defined, validate according // to the global definition $result = $d_defs[$attr_key]->validate( $value, $config, $context ); } else { // system never heard of the attribute? DELETE! $result = false; } // put the results into effect if ($result === false || $result === null) { // this is a generic error message that should replaced // with more specific ones when possible if ($e) { $e->send(E_ERROR, 'AttrValidator: Attribute removed'); } // remove the attribute unset($attr[$attr_key]); } elseif (is_string($result)) { // generally, if a substitution is happening, there // was some sort of implicit correction going on. We'll // delegate it to the attribute classes to say exactly what. // simple substitution $attr[$attr_key] = $result; } else { // nothing happens } // we'd also want slightly more complicated substitution // involving an array as the return value, // although we're not sure how colliding attributes would // resolve (certain ones would be completely overriden, // others would prepend themselves). } $context->destroy('CurrentAttr'); // post transforms // global (error reporting untested) foreach ($definition->info_attr_transform_post as $transform) { $attr = $transform->transform($o = $attr, $config, $context); if ($e) { if ($attr != $o) { $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr); } } } // local (error reporting untested) foreach ($definition->info[$token->name]->attr_transform_post as $transform) { $attr = $transform->transform($o = $attr, $config, $context); if ($e) { if ($attr != $o) { $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr); } } } $token->attr = $attr; // destroy CurrentToken if we made it ourselves if (!$current_token) { $context->destroy('CurrentToken'); } } } // vim: et sw=4 sts=4
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..
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ConfigSchema
[-] CSSDefinition.php
[edit]
[-] Generator.php
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[-] ElementDef.php
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[-] AttrTypes.php
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ChildDef
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AttrDef
[-] ChildDef.php
[edit]
[+]
Printer
[-] Exception.php
[edit]
[-] PercentEncoder.php
[edit]
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Lexer
[-] IDAccumulator.php
[edit]
[-] Token.php
[edit]
[+]
TagTransform
[-] AttrTransform.php
[edit]
[-] Language.php
[edit]
[-] Filter.php
[edit]
[-] Printer.php
[edit]
[-] DefinitionCache.php
[edit]
[-] Injector.php
[edit]
[-] TokenFactory.php
[edit]
[-] URISchemeRegistry.php
[edit]
[-] Length.php
[edit]
[-] URIParser.php
[edit]
[-] AttrCollections.php
[edit]
[-] Lexer.php
[edit]
[-] HTMLDefinition.php
[edit]
[-] Context.php
[edit]
[-] DefinitionCacheFactory.php
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[-] Doctype.php
[edit]
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Strategy
[-] LanguageFactory.php
[edit]
[+]
Token
[-] TagTransform.php
[edit]
[-] AttrValidator.php
[edit]
[+]
Filter
[-] ErrorCollector.php
[edit]
[-] DoctypeRegistry.php
[edit]
[-] UnitConverter.php
[edit]
[-] EntityParser.php
[edit]
[-] URIScheme.php
[edit]
[-] Bootstrap.php
[edit]
[-] StringHashParser.php
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VarParser
[-] VarParserException.php
[edit]
[-] EntityLookup.php
[edit]
[-] ErrorStruct.php
[edit]
[-] HTMLModule.php
[edit]
[-] Definition.php
[edit]
[-] PropertyList.php
[edit]
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URIFilter
[-] Strategy.php
[edit]
[-] AttrDef.php
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HTMLModule
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URIScheme
[-] Config.php
[edit]
[-] HTMLModuleManager.php
[edit]
[-] Encoder.php
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AttrTransform
[-] URI.php
[edit]
[-] ContentSets.php
[edit]
[-] ConfigSchema.php
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[+]
EntityLookup
[-] VarParser.php
[edit]
[+]
Language
[-] PropertyListIterator.php
[edit]
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DefinitionCache
[-] StringHash.php
[edit]
[+]
Injector
[-] URIDefinition.php
[edit]
[-] URIFilter.php
[edit]