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File: tests/runnable/HTMLPurifier/HTMLPurifier/AttrValidator.php

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  Classes of jstar88  >  OPBE  >  tests/runnable/HTMLPurifier/HTMLPurifier/AttrValidator.php  >  Download  
File: tests/runnable/HTMLPurifier/HTMLPurifier/AttrValidator.php
Role: Auxiliary script
Content type: text/plain
Description: Auxiliary script
Class: OPBE
Ogame probabilistic battle engine
Author: By
Last change:
Date: 1 year ago
Size: 6,415 bytes
 

Contents

Class file image Download
<?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');

    }


}

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