157 Zeilen
4.5 KiB
PHP
157 Zeilen
4.5 KiB
PHP
<?php
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/**
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* Project:
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* Contenido Content Management System
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*
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* Description:
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* Converts characters between their normalized and diacritic representation.
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*
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* Requirements:
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* @con_php_req 5.0
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*
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*
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* @package Contenido Backend classes
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* @version 1.0.0
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* @author unknown
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* @copyright four for business AG <www.4fb.de>
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* @license http://www.contenido.org/license/LIZENZ.txt
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* @link http://www.4fb.de
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* @link http://www.contenido.org
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* @since file available since contenido release <= 4.6
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*
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* {@internal
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* created unknown
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* modified 2008-06-30, Dominik Ziegler, add security fix
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*
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* $Id$:
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* }}
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*
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*/
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if(!defined('CON_FRAMEWORK')) {
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die('Illegal call');
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}
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/**
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* cCharacterConverter
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*
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* A diacritic mark or diacritic is a mark added to a letter to alter a
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* word's pronunciation or to distungish between similar words. However,
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* users of foreign languages are unable to type diacritics (either because
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* the keyboard mapping doesn't support them, or they are looking to similar
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* to other characters). Examples for conversions:
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*
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* German diacritic char <20> maps to u and ue.
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*
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* Developers can use the diacritic search implemented in the GenericDB to
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* automatically handle diacritic search conversion.
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*/
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class cCharacterConverter
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{
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var $_oDB;
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var $_aAliasCache;
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var $_aCharCache;
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function __construct ()
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{
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$this->_oDB = new DB_ConLite;
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$this->_aAliasCache = array();
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$this->_aCharCache = array();
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}
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function fetchDiacriticCharactersForNormalizedChar ($sEncoding, $cNormalizedChar)
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{
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global $cfg;
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$cNormalizedChar = Contenido_Security::escapeDB($cNormalizedChar, $this->_oDB);
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$sEncoding = Contenido_Security::escapeDB($sEncoding, $this->_oDB);
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$sEncoding = $this->correctEncoding($sEncoding);
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if (!array_key_exists($sEncoding, $this->_aCharCache))
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{
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$this->_aCharCache[$sEncoding] = array();
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}
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if (array_key_exists($cNormalizedChar, $this->_aCharCache[$sEncoding]) && count($this->_aCharCache[$cNormalizedChar][$sEncoding]) > 0)
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{
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return $this->_aCharCache[$sEncoding][$cNormalizedChar];
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}
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$sql = "SELECT charid FROM ".$cfg["tab"]["chartable"]." WHERE encoding = '".$sEncoding."' AND normalized_char = '".$cNormalizedChar."'";
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$this->_oDB->query($sql);
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$aChars = array();
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$this->_aCharCache[$sEncoding][$cNormalizedChar] = array();
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while ($this->_oDB->next_record())
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{
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$aChars[] = chr($this->_oDB->f("charid"));
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$this->_aCharCache[$sEncoding][$cNormalizedChar][] = chr($this->_oDB->f("charid"));
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}
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return ($aChars);
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}
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function fetchNormalizedCharsForDiacriticCharacter ($sEncoding, $cCharacter)
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{
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global $cfg;
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$cCharacter = Contenido_Security::escapeDB($cCharacter, $this->_oDB);
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$sEncoding = Contenido_Security::escapeDB($sEncoding, $this->_oDB);
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$sEncoding = $this->correctEncoding($sEncoding);
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if (strlen($cCharacter) > 1)
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{
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cError(__FILE__, __LINE__, "cCharacter is longer than 1 character");
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}
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if (!array_key_exists($sEncoding, $this->_aAliasCache))
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{
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$this->_aAliasCache[$sEncoding] = array();
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}
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if (array_key_exists($cCharacter, $this->_aAliasCache[$sEncoding]) && count($this->_aAliasCache[$sEncoding][$cCharacter]) > 0)
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{
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return $this->_aAliasCache[$sEncoding][$cCharacter];
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}
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$sql = "SELECT normalized_char FROM ".$cfg["tab"]["chartable"]." WHERE encoding = '".$sEncoding."' AND charid = '".ord($cCharacter)."'";
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$this->_oDB->query($sql);
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$aAliases = array();
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$this->_aAliasCache[$sEncoding][$cCharacter] = array();
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while ($this->_oDB->next_record())
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{
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$aAliases[] = $this->_oDB->f("normalized_char");
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$this->_aAliasCache[$sEncoding][$cCharacter][] = $this->_oDB->f("normalized_char");
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}
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return ($aAliases);
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}
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function correctEncoding ($sEncoding)
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{
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$encodingAliases = array(
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"win-1250" => array("windows-1250", "windows1250", "win-1250"),
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"win-1251" => array("windows-1251", "windows1251", "win-1251"),
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"win-1252" => array("windows-1252", "windows1252", "win-1252"),
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"win-1253" => array("windows-1253", "windows1253", "win-1253"),
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"win-1254" => array("windows-1254", "windows1254", "win-1254"),
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"win-1256" => array("windows-1256", "windows1256", "win-1256"),
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"win-1257" => array("windows-1257", "windows1257", "win-1257"),
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"win-1258" => array("windows-1258", "windows1258", "win-1258"));
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foreach ($encodingAliases as $correctAlias => $encodingAlias)
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{
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if (in_array($sEncoding, $encodingAlias))
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{
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$sEncoding = $correctAlias;
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}
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}
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return $sEncoding;
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}
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} |