<?php

/**
 * Represents a pre or post processing filter on HTML Purifier's output
 *
 * Sometimes, a little ad-hoc fixing of HTML has to be done before
 * it gets sent through HTML Purifier: you can use filters to acheive
 * this effect. For instance, YouTube videos can be preserved using
 * this manner. You could have used a decorator for this task, but
 * PHP's support for them is not terribly robust, so we're going
 * to just loop through the filters.
 *
 * Filters should be exited first in, last out. If there are three filters,
 * named 1, 2 and 3, the order of execution should go 1->preFilter,
 * 2->preFilter, 3->preFilter, purify, 3->postFilter, 2->postFilter,
 * 1->postFilter.
 *
 * @note Methods are not declared abstract as it is perfectly legitimate
 *       for an implementation not to want anything to happen on a step
 */

class HTMLPurifier_Filter
{

    /**
     * Name of the filter for identification purposes.
     * @type string
     */
    public $name;

    /**
     * Pre-processor function, handles HTML before HTML Purifier
     * @param string $html
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return string
     */
    public function preFilter($html, $config, $context)
    {
        return $html;
    }

    /**
     * Post-processor function, handles HTML after HTML Purifier
     * @param string $html
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return string
     */
    public function postFilter($html, $config, $context)
    {
        return $html;
    }
}

// vim: et sw=4 sts=4

• [D] AttrDef
• [D] AttrTransform
• [D] ChildDef
• [D] ConfigSchema
• [D] DefinitionCache
• [D] EntityLookup
• [D] Filter
• [D] HTMLModule
• [D] Injector
• [D] Language
• [D] Lexer
• [D] Node
• [D] Printer
• [D] Strategy
• [D] TagTransform
• [D] Token
• [D] URIFilter
• [D] URIScheme
• [D] VarParser
• [F] Arborize.php
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• [F] AttrCollections.php
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• [F] AttrDef.php
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• [F] AttrTransform.php
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• [F] AttrTypes.php
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• [F] AttrValidator.php
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• [F] Bootstrap.php
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• [F] ChildDef.php
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• [F] Config.php
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• [F] ConfigSchema.php
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• [F] ContentSets.php
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• [F] Context.php
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• [F] CSSDefinition.php
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• [F] Definition.php
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• [F] DefinitionCache.php
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• [F] DefinitionCacheFactory.php
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• [F] Doctype.php
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• [F] DoctypeRegistry.php
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• [F] ElementDef.php
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• [F] Encoder.php
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• [F] EntityLookup.php
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• [F] EntityParser.php
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• [F] ErrorCollector.php
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• [F] ErrorStruct.php
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• [F] Exception.php
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• [F] Filter.php
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• [F] Generator.php
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• [F] HTMLDefinition.php
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• [F] HTMLModule.php
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• [F] HTMLModuleManager.php
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• [F] IDAccumulator.php
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• [F] Injector.php
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• [F] Language.php
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• [F] LanguageFactory.php
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• [F] Length.php
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• [F] Lexer.php
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• [F] Node.php
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• [F] PercentEncoder.php
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• [F] Printer.php
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• [F] PropertyList.php
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• [F] PropertyListIterator.php
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• [F] Queue.php
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• [F] Strategy.php
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• [F] StringHash.php
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• [F] StringHashParser.php
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• [F] TagTransform.php
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• [F] Token.php
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• [F] TokenFactory.php
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• [F] UnitConverter.php
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• [F] URI.php
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• [F] URIDefinition.php
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• [F] URIFilter.php
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• [F] URIParser.php
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• [F] URIScheme.php
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• [F] URISchemeRegistry.php
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• [F] VarParser.php
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• [F] VarParserException.php
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• [F] Zipper.php
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