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Directory >> /var/www/html/back/vendor/ezyang/htmlpurifier/library/HTMLPurifier/

File / Folder	Size	Action
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AttrDef	--	ren
AttrTransform	--	ren
ChildDef	--	ren
ConfigSchema	--	ren
DefinitionCache	--	ren
EntityLookup	--	ren
Filter	--	ren
HTMLModule	--	ren
Injector	--	ren
Language	--	ren
Lexer	--	ren
Node	--	ren
Printer	--	ren
Strategy	--	ren
TagTransform	--	ren
Token	--	ren
URIFilter	--	ren
URIScheme	--	ren
VarParser	--	ren
Arborize.php	2.49KB	edt ren
AttrCollections.php	4.748KB	edt ren
AttrDef.php	5.073KB	edt ren
AttrTransform.php	1.942KB	edt ren
AttrTypes.php	3.662KB	edt ren
AttrValidator.php	6.419KB	edt ren
Bootstrap.php	2.637KB	edt ren
CSSDefinition.php	19.489KB	edt ren
ChildDef.php	1.522KB	edt ren
Config.php	31.065KB	edt ren
ConfigSchema.php	5.757KB	edt ren
ContentSets.php	5.473KB	edt ren
Context.php	2.363KB	edt ren
Definition.php	1.329KB	edt ren
DefinitionCache.php	3.821KB	edt ren
DefinitionCacheFactory.php	3.119KB	edt ren
Doctype.php	1.545KB	edt ren
DoctypeRegistry.php	4.117KB	edt ren
ElementDef.php	7.354KB	edt ren
Encoder.php	25.106KB	edt ren
EntityLookup.php	1.393KB	edt ren
EntityParser.php	9.801KB	edt ren
ErrorCollector.php	7.446KB	edt ren
ErrorStruct.php	1.849KB	edt ren
Exception.php	0.173KB	edt ren
Filter.php	1.587KB	edt ren
Generator.php	10.012KB	edt ren
HTMLDefinition.php	17.166KB	edt ren
HTMLModule.php	9.956KB	edt ren
HTMLModuleManager.php	15.469KB	edt ren
IDAccumulator.php	1.608KB	edt ren
Injector.php	8.795KB	edt ren
Language.php	5.92KB	edt ren
LanguageFactory.php	6.298KB	edt ren
Length.php	3.801KB	edt ren
Lexer.php	12.711KB	edt ren
Node.php	1.25KB	edt ren
PercentEncoder.php	3.481KB	edt ren
Printer.php	5.759KB	edt ren
PropertyList.php	2.718KB	edt ren
PropertyListIterator.php	0.873KB	edt ren
Queue.php	1.515KB	edt ren
Strategy.php	0.744KB	edt ren
StringHash.php	1.073KB	edt ren
StringHashParser.php	3.556KB	edt ren
TagTransform.php	1.072KB	edt ren
Token.php	2.173KB	edt ren
TokenFactory.php	3.026KB	edt ren
URI.php	10.367KB	edt ren
URIDefinition.php	3.35KB	edt ren
URIFilter.php	2.31KB	edt ren
URIParser.php	2.24KB	edt ren
URIScheme.php	3.399KB	edt ren
URISchemeRegistry.php	2.353KB	edt ren
UnitConverter.php	9.908KB	edt ren
VarParser.php	5.85KB	edt ren
VarParserException.php	0.153KB	edt ren
Zipper.php	4.338KB	edt ren

<?php

/**
 * Forgivingly lexes HTML (SGML-style) markup into tokens.
 *
 * A lexer parses a string of SGML-style markup and converts them into
 * corresponding tokens.  It doesn't check for well-formedness, although its
 * internal mechanism may make this automatic (such as the case of
 * HTMLPurifier_Lexer_DOMLex).  There are several implementations to choose
 * from.
 *
 * A lexer is HTML-oriented: it might work with XML, but it's not
 * recommended, as we adhere to a subset of the specification for optimization
 * reasons. This might change in the future. Also, most tokenizers are not
 * expected to handle DTDs or PIs.
 *
 * This class should not be directly instantiated, but you may use create() to
 * retrieve a default copy of the lexer.  Being a supertype, this class
 * does not actually define any implementation, but offers commonly used
 * convenience functions for subclasses.
 *
 * @note The unit tests will instantiate this class for testing purposes, as
 *       many of the utility functions require a class to be instantiated.
 *       This means that, even though this class is not runnable, it will
 *       not be declared abstract.
 *
 * @par
 *
 * @note
 * We use tokens rather than create a DOM representation because DOM would:
 *
 * @par
 *  -# Require more processing and memory to create,
 *  -# Is not streamable, and
 *  -# Has the entire document structure (html and body not needed).
 *
 * @par
 * However, DOM is helpful in that it makes it easy to move around nodes
 * without a lot of lookaheads to see when a tag is closed. This is a
 * limitation of the token system and some workarounds would be nice.
 */
class HTMLPurifier_Lexer
{

/**
     * Whether or not this lexer implements line-number/column-number tracking.
     * If it does, set to true.
     */
    public $tracksLineNumbers = false;

/**
     * @type HTMLPurifier_EntityParser
     */
    private $_entity_parser;

// -- STATIC ----------------------------------------------------------

/**
     * Retrieves or sets the default Lexer as a Prototype Factory.
     *
     * By default HTMLPurifier_Lexer_DOMLex will be returned. There are
     * a few exceptions involving special features that only DirectLex
     * implements.
     *
     * @note The behavior of this class has changed, rather than accepting
     *       a prototype object, it now accepts a configuration object.
     *       To specify your own prototype, set %Core.LexerImpl to it.
     *       This change in behavior de-singletonizes the lexer object.
     *
     * @param HTMLPurifier_Config $config
     * @return HTMLPurifier_Lexer
     * @throws HTMLPurifier_Exception
     */
    public static function create($config)
    {
        if (!($config instanceof HTMLPurifier_Config)) {
            $lexer = $config;
            trigger_error(
                "Passing a prototype to
                HTMLPurifier_Lexer::create() is deprecated, please instead
                use %Core.LexerImpl",
                E_USER_WARNING
            );
        } else {
            $lexer = $config->get('Core.LexerImpl');
        }

$needs_tracking =
            $config->get('Core.MaintainLineNumbers') ||
            $config->get('Core.CollectErrors');

$inst = null;
        if (is_object($lexer)) {
            $inst = $lexer;
        } else {
            if (is_null($lexer)) {
                do {
                    // auto-detection algorithm
                    if ($needs_tracking) {
                        $lexer = 'DirectLex';
                        break;
                    }

if (class_exists('DOMDocument') &&
                        method_exists('DOMDocument', 'loadHTML') &&
                        !extension_loaded('domxml')
                    ) {
                        // check for DOM support, because while it's part of the
                        // core, it can be disabled compile time. Also, the PECL
                        // domxml extension overrides the default DOM, and is evil
                        // and nasty and we shan't bother to support it
                        $lexer = 'DOMLex';
                    } else {
                        $lexer = 'DirectLex';
                    }
                } while (0);
            } // do..while so we can break

// instantiate recognized string names
            switch ($lexer) {
                case 'DOMLex':
                    $inst = new HTMLPurifier_Lexer_DOMLex();
                    break;
                case 'DirectLex':
                    $inst = new HTMLPurifier_Lexer_DirectLex();
                    break;
                case 'PH5P':
                    $inst = new HTMLPurifier_Lexer_PH5P();
                    break;
                default:
                    throw new HTMLPurifier_Exception(
                        "Cannot instantiate unrecognized Lexer type " .
                        htmlspecialchars($lexer)
                    );
            }
        }

if (!$inst) {
            throw new HTMLPurifier_Exception('No lexer was instantiated');
        }

// once PHP DOM implements native line numbers, or we
        // hack out something using XSLT, remove this stipulation
        if ($needs_tracking && !$inst->tracksLineNumbers) {
            throw new HTMLPurifier_Exception(
                'Cannot use lexer that does not support line numbers with ' .
                'Core.MaintainLineNumbers or Core.CollectErrors (use DirectLex instead)'
            );
        }

return $inst;

}

// -- CONVENIENCE MEMBERS ---------------------------------------------

public function __construct()
    {
        $this->_entity_parser = new HTMLPurifier_EntityParser();
    }

/**
     * Most common entity to raw value conversion table for special entities.
     * @type array
     */
    protected $_special_entity2str =
        array(
            '&quot;' => '"',
            '&amp;' => '&',
            '&lt;' => '<',
            '&gt;' => '>',
            '&#39;' => "'",
            '&#039;' => "'",
            '&#x27;' => "'"
        );

public function parseText($string, $config) {
        return $this->parseData($string, false, $config);
    }

public function parseAttr($string, $config) {
        return $this->parseData($string, true, $config);
    }

/**
     * Parses special entities into the proper characters.
     *
     * This string will translate escaped versions of the special characters
     * into the correct ones.
     *
     * @param string $string String character data to be parsed.
     * @return string Parsed character data.
     */
    public function parseData($string, $is_attr, $config)
    {
        // following functions require at least one character
        if ($string === '') {
            return '';
        }

// subtracts amps that cannot possibly be escaped
        $num_amp = substr_count($string, '&') - substr_count($string, '& ') -
            ($string[strlen($string) - 1] === '&' ? 1 : 0);

if (!$num_amp) {
            return $string;
        } // abort if no entities
        $num_esc_amp = substr_count($string, '&amp;');
        $string = strtr($string, $this->_special_entity2str);

// code duplication for sake of optimization, see above
        $num_amp_2 = substr_count($string, '&') - substr_count($string, '& ') -
            ($string[strlen($string) - 1] === '&' ? 1 : 0);

if ($num_amp_2 <= $num_esc_amp) {
            return $string;
        }

// hmm... now we have some uncommon entities. Use the callback.
        if ($config->get('Core.LegacyEntityDecoder')) {
            $string = $this->_entity_parser->substituteSpecialEntities($string);
        } else {
            if ($is_attr) {
                $string = $this->_entity_parser->substituteAttrEntities($string);
            } else {
                $string = $this->_entity_parser->substituteTextEntities($string);
            }
        }
        return $string;
    }

/**
     * Lexes an HTML string into tokens.
     * @param $string String HTML.
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return HTMLPurifier_Token[] array representation of HTML.
     */
    public function tokenizeHTML($string, $config, $context)
    {
        throw new Exception('Call to abstract class');
    }

/**
     * Translates CDATA sections into regular sections (through escaping).
     * @param string $string HTML string to process.
     * @return string HTML with CDATA sections escaped.
     */
    protected static function escapeCDATA($string)
    {
        return preg_replace_callback(
            '/<!\[CDATA\[(.+?)\]\]>/s',
            array('HTMLPurifier_Lexer', 'CDATACallback'),
            $string
        );
    }

/**
     * Special CDATA case that is especially convoluted for <script>
     * @param string $string HTML string to process.
     * @return string HTML with CDATA sections escaped.
     */
    protected static function escapeCommentedCDATA($string)
    {
        return preg_replace_callback(
            '#<!\[CDATA\[//><!\]\]>#s',
            array('HTMLPurifier_Lexer', 'CDATACallback'),
            $string
        );
    }

/**
     * Callback function for escapeCDATA() that does the work.
     *
     * @warning Though this is public in order to let the callback happen,
     *          calling it directly is not recommended.
     * @param array $matches PCRE matches array, with index 0 the entire match
     *                  and 1 the inside of the CDATA section.
     * @return string Escaped internals of the CDATA section.
     */
    protected static function CDATACallback($matches)
    {
        // not exactly sure why the character set is needed, but whatever
        return htmlspecialchars($matches[1], ENT_COMPAT, 'UTF-8');
    }

/**
     * Takes a piece of HTML and normalizes it by converting entities, fixing
     * encoding, extracting bits, and other good stuff.
     * @param string $html HTML.
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return string
     * @todo Consider making protected
     */
    public function normalize($html, $config, $context)
    {
        // normalize newlines to \n
        if ($config->get('Core.NormalizeNewlines')) {
            $html = str_replace("\r\n", "\n", (string)$html);
            $html = str_replace("\r", "\n", (string)$html);
        }

if ($config->get('HTML.Trusted')) {
            // escape convoluted CDATA
            $html = $this->escapeCommentedCDATA($html);
        }

// escape CDATA
        $html = $this->escapeCDATA($html);

// extract body from document if applicable
        if ($config->get('Core.ConvertDocumentToFragment')) {
            $e = false;
            if ($config->get('Core.CollectErrors')) {
                $e =& $context->get('ErrorCollector');
            }
            $new_html = $this->extractBody($html);
            if ($e && $new_html != $html) {
                $e->send(E_WARNING, 'Lexer: Extracted body');
            }
            $html = $new_html;
        }

// expand entities that aren't the big five
        if ($config->get('Core.LegacyEntityDecoder')) {
            $html = $this->_entity_parser->substituteNonSpecialEntities($html);
        }

// clean into wellformed UTF-8 string for an SGML context: this has
        // to be done after entity expansion because the entities sometimes
        // represent non-SGML characters (horror, horror!)
        $html = HTMLPurifier_Encoder::cleanUTF8($html);

// if processing instructions are to removed, remove them now
        if ($config->get('Core.RemoveProcessingInstructions')) {
            $html = preg_replace('#<\?.+?\?>#s', '', $html);
        }

$hidden_elements = $config->get('Core.HiddenElements');
        if ($config->get('Core.AggressivelyRemoveScript') &&
            !($config->get('HTML.Trusted') || !$config->get('Core.RemoveScriptContents')
            || empty($hidden_elements["script"]))) {
            $html = preg_replace('#<script[^>]*>.*?</script>#i', '', $html);
        }

return $html;
    }

/**
     * Takes a string of HTML (fragment or document) and returns the content
     * @todo Consider making protected
     */
    public function extractBody($html)
    {
        $matches = array();
        $result = preg_match('|(.*?)<body[^>]*>(.*)</body>|is', $html, $matches);
        if ($result) {
            // Make sure it's not in a comment
            $comment_start = strrpos($matches[1], '');
            if ($comment_start === false ||
                ($comment_end !== false && $comment_end > $comment_start)) {
                return $matches[2];
            }
        }
        return $html;
    }
}

// vim: et sw=4 sts=4