813 lines
21 KiB
PHP
813 lines
21 KiB
PHP
<?php
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/**
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* @addtogroup Language
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*
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* @author Zhengzhu Feng <zhengzhu@gmail.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU General Public License
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*/
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class LanguageConverter {
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var $mPreferredVariant='';
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var $mMainLanguageCode;
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var $mVariants, $mVariantFallbacks;
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var $mTablesLoaded = false;
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var $mTables;
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var $mTitleDisplay='';
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var $mDoTitleConvert=true, $mDoContentConvert=true;
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var $mTitleFromFlag = false;
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var $mCacheKey;
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var $mLangObj;
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var $mMarkup;
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var $mFlags;
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var $mUcfirst = false;
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const CACHE_VERSION_KEY = 'VERSION 5';
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/**
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* Constructor
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*
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* @param string $maincode the main language code of this language
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* @param array $variants the supported variants of this language
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* @param array $variantfallback the fallback language of each variant
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* @param array $markup array defining the markup used for manual conversion
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* @param array $flags array defining the custom strings that maps to the flags
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* @access public
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*/
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function __construct($langobj, $maincode,
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$variants=array(),
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$variantfallbacks=array(),
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$markup=array(),
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$flags = array()) {
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$this->mLangObj = $langobj;
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$this->mMainLanguageCode = $maincode;
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$this->mVariants = $variants;
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$this->mVariantFallbacks = $variantfallbacks;
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$this->mCacheKey = wfMemcKey( 'conversiontables', $maincode );
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$m = array('begin'=>'-{', 'flagsep'=>'|', 'codesep'=>':',
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'varsep'=>';', 'end'=>'}-');
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$this->mMarkup = array_merge($m, $markup);
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$f = array('A'=>'A', 'T'=>'T', 'R' => 'R');
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$this->mFlags = array_merge($f, $flags);
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}
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/**
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* @access public
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*/
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function getVariants() {
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return $this->mVariants;
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}
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/**
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* in case some variant is not defined in the markup, we need
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* to have some fallback. for example, in zh, normally people
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* will define zh-cn and zh-tw, but less so for zh-sg or zh-hk.
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* when zh-sg is preferred but not defined, we will pick zh-cn
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* in this case. right now this is only used by zh.
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*
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* @param string $v the language code of the variant
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* @return string the code of the fallback language or false if there is no fallback
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* @private
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*/
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function getVariantFallback($v) {
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return $this->mVariantFallbacks[$v];
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}
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/**
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* get preferred language variants.
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* @param boolean $fromUser Get it from $wgUser's preferences
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* @return string the preferred language code
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* @access public
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*/
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function getPreferredVariant( $fromUser = true ) {
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global $wgUser, $wgRequest, $wgVariantArticlePath, $wgDefaultLanguageVariant;
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if($this->mPreferredVariant)
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return $this->mPreferredVariant;
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// see if the preference is set in the request
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$req = $wgRequest->getText( 'variant' );
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if( in_array( $req, $this->mVariants ) ) {
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$this->mPreferredVariant = $req;
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return $req;
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}
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// check the syntax /code/ArticleTitle
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if($wgVariantArticlePath!=false && isset($_SERVER['SCRIPT_NAME'])){
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// Note: SCRIPT_NAME probably won't hold the correct value if PHP is run as CGI
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// (it will hold path to php.cgi binary), and might not exist on some very old PHP installations
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$scriptBase = basename( $_SERVER['SCRIPT_NAME'] );
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if(in_array($scriptBase,$this->mVariants)){
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$this->mPreferredVariant = $scriptBase;
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return $this->mPreferredVariant;
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}
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}
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// get language variant preference from logged in users
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// Don't call this on stub objects because that causes infinite
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// recursion during initialisation
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if( $fromUser && $wgUser->isLoggedIn() ) {
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$this->mPreferredVariant = $wgUser->getOption('variant');
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return $this->mPreferredVariant;
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}
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// see if default variant is globaly set
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if($wgDefaultLanguageVariant != false && in_array( $wgDefaultLanguageVariant, $this->mVariants )){
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$this->mPreferredVariant = $wgDefaultLanguageVariant;
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return $this->mPreferredVariant;
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}
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# FIXME rewrite code for parsing http header. The current code
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# is written specific for detecting zh- variants
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if( !$this->mPreferredVariant ) {
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// see if some supported language variant is set in the
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// http header, but we don't set the mPreferredVariant
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// variable in case this is called before the user's
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// preference is loaded
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$pv=$this->mMainLanguageCode;
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if(array_key_exists('HTTP_ACCEPT_LANGUAGE', $_SERVER)) {
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$header = str_replace( '_', '-', strtolower($_SERVER["HTTP_ACCEPT_LANGUAGE"]));
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$zh = strstr($header, $pv.'-');
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if($zh) {
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$pv = substr($zh,0,5);
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}
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}
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// don't try to return bad variant
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if(in_array( $pv, $this->mVariants ))
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return $pv;
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}
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return $this->mMainLanguageCode;
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}
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/**
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* dictionary-based conversion
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*
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* @param string $text the text to be converted
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* @param string $toVariant the target language code
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* @return string the converted text
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* @private
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*/
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function autoConvert($text, $toVariant=false) {
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$fname="LanguageConverter::autoConvert";
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wfProfileIn( $fname );
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if(!$this->mTablesLoaded)
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$this->loadTables();
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if(!$toVariant)
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$toVariant = $this->getPreferredVariant();
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if(!in_array($toVariant, $this->mVariants))
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return $text;
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/* we convert everything except:
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1. html markups (anything between < and >)
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2. html entities
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3. place holders created by the parser
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*/
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global $wgParser;
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if (isset($wgParser))
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$marker = '|' . $wgParser->UniqPrefix() . '[\-a-zA-Z0-9]+';
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else
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$marker = "";
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// this one is needed when the text is inside an html markup
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$htmlfix = '|<[^>]+$|^[^<>]*>';
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// disable convert to variants between <code></code> tags
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$codefix = '<code>.+?<\/code>|';
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// disable convertsion of <script type="text/javascript"> ... </script>
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$scriptfix = '<script.*?>.*?<\/script>|';
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$reg = '/'.$codefix . $scriptfix . '<[^>]+>|&[a-zA-Z#][a-z0-9]+;' . $marker . $htmlfix . '/s';
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$matches = preg_split($reg, $text, -1, PREG_SPLIT_OFFSET_CAPTURE);
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$m = array_shift($matches);
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$ret = $this->translate($m[0], $toVariant);
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$mstart = $m[1]+strlen($m[0]);
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foreach($matches as $m) {
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$ret .= substr($text, $mstart, $m[1]-$mstart);
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$ret .= $this->translate($m[0], $toVariant);
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$mstart = $m[1] + strlen($m[0]);
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}
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wfProfileOut( $fname );
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return $ret;
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}
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/**
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* Translate a string to a variant
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* Doesn't process markup or do any of that other stuff, for that use convert()
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*
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* @param string $text Text to convert
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* @param string $variant Variant language code
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* @return string Translated text
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*/
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function translate( $text, $variant ) {
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wfProfileIn( __METHOD__ );
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if( !$this->mTablesLoaded )
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$this->loadTables();
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$text = $this->mTables[$variant]->replace( $text );
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wfProfileOut( __METHOD__ );
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return $text;
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}
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/**
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* convert text to all supported variants
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*
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* @param string $text the text to be converted
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* @return array of string
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* @public
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*/
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function autoConvertToAllVariants($text) {
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$fname="LanguageConverter::autoConvertToAllVariants";
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wfProfileIn( $fname );
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if( !$this->mTablesLoaded )
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$this->loadTables();
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$ret = array();
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foreach($this->mVariants as $variant) {
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$ret[$variant] = $this->translate($text, $variant);
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}
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wfProfileOut( $fname );
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return $ret;
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}
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/**
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* convert link text to all supported variants
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*
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* @param string $text the text to be converted
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* @return array of string
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* @public
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*/
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function convertLinkToAllVariants($text) {
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if( !$this->mTablesLoaded )
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$this->loadTables();
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$ret = array();
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$tarray = explode($this->mMarkup['begin'], $text);
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$tfirst = array_shift($tarray);
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foreach($this->mVariants as $variant)
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$ret[$variant] = $this->translate($tfirst,$variant);
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foreach($tarray as $txt) {
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$marked = explode($this->mMarkup['end'], $txt, 2);
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foreach($this->mVariants as $variant){
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$ret[$variant] .= $this->mMarkup['begin'].$marked[0].$this->mMarkup['end'];
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if(array_key_exists(1, $marked))
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$ret[$variant] .= $this->translate($marked[1],$variant);
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}
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}
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return $ret;
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}
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/**
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* Convert text using a parser object for context
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*/
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function parserConvert( $text, &$parser ) {
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global $wgDisableLangConversion;
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/* don't do anything if this is the conversion table */
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if ( $parser->getTitle()->getNamespace() == NS_MEDIAWIKI &&
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strpos($parser->mTitle->getText(), "Conversiontable") !== false )
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{
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return $text;
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}
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if($wgDisableLangConversion)
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return $text;
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$text = $this->convert( $text );
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$parser->mOutput->setTitleText( $this->mTitleDisplay );
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return $text;
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}
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/**
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* Parse flags with syntax -{FLAG| ... }-
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*
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*/
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function parseFlags($marked){
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$flags = array();
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// process flag only if the flag is valid
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if(strlen($marked) < 2 || !(in_array($marked[0],$this->mFlags) && $marked[1]=='|' ) )
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return array($marked,array());
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$tt = explode($this->mMarkup['flagsep'], $marked, 2);
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if(sizeof($tt) == 2) {
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$f = explode($this->mMarkup['varsep'], $tt[0]);
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foreach($f as $ff) {
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$ff = trim($ff);
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if(array_key_exists($ff, $this->mFlags) &&
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!array_key_exists($this->mFlags[$ff], $flags))
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$flags[] = $this->mFlags[$ff];
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}
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$rules = $tt[1];
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}
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else
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$rules = $marked;
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if( !in_array('R',$flags) ){
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//FIXME: may cause trouble here...
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//strip since it interferes with the parsing, plus,
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//all spaces should be stripped in this tag anyway.
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$rules = str_replace(' ', '', $rules);
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}
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return array($rules,$flags);
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}
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/**
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* convert text to different variants of a language. the automatic
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* conversion is done in autoConvert(). here we parse the text
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* marked with -{}-, which specifies special conversions of the
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* text that can not be accomplished in autoConvert()
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*
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* syntax of the markup:
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* -{code1:text1;code2:text2;...}- or
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* -{text}- in which case no conversion should take place for text
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*
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* @param string $text text to be converted
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* @param bool $isTitle whether this conversion is for the article title
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* @return string converted text
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* @access public
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*/
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function convert( $text , $isTitle=false) {
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$mw =& MagicWord::get( 'notitleconvert' );
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if( $mw->matchAndRemove( $text ) )
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$this->mDoTitleConvert = false;
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$mw =& MagicWord::get( 'nocontentconvert' );
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if( $mw->matchAndRemove( $text ) ) {
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$this->mDoContentConvert = false;
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}
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// no conversion if redirecting
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$mw =& MagicWord::get( 'redirect' );
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if( $mw->matchStart( $text ))
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return $text;
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if( $isTitle ) {
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// use the title from the T flag if any
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if($this->mTitleFromFlag){
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$this->mTitleFromFlag = false;
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return $this->mTitleDisplay;
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}
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// check for __NOTC__ tag
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if( !$this->mDoTitleConvert ) {
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$this->mTitleDisplay = $text;
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return $text;
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}
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global $wgRequest;
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$isredir = $wgRequest->getText( 'redirect', 'yes' );
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$action = $wgRequest->getText( 'action' );
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if ( $isredir == 'no' || $action == 'edit' ) {
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return $text;
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}
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else {
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$this->mTitleDisplay = $this->convert($text);
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return $this->mTitleDisplay;
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}
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}
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$plang = $this->getPreferredVariant();
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if( isset( $this->mVariantFallbacks[$plang] ) ) {
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$fallback = $this->mVariantFallbacks[$plang];
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} else {
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$fallback = $this->mMainLanguageCode;
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}
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$tarray = explode($this->mMarkup['begin'], $text);
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$tfirst = array_shift($tarray);
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if($this->mDoContentConvert)
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$text = $this->autoConvert($tfirst);
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else
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$text = $tfirst;
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foreach($tarray as $txt) {
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$marked = explode($this->mMarkup['end'], $txt, 2);
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// strip the flags from syntax like -{T| ... }-
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list($rules,$flags) = $this->parseFlags($marked[0]);
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// proces R flag: output raw content of -{ ... }-
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if( in_array('R',$flags) ){
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$disp = $rules;
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} else if( $this->mDoContentConvert){
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// parse the contents -{ ... }-
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$carray = $this->parseManualRule($rules, $flags);
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$disp = '';
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if(array_key_exists($plang, $carray)) {
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$disp = $carray[$plang];
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} else if(array_key_exists($fallback, $carray)) {
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$disp = $carray[$fallback];
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}
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} else{
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// if we don't do content convert, still strip the -{}- tags
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$disp = $rules;
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$flags = array();
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}
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if($disp) {
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// use syntax -{T|zh:TitleZh;zh-tw:TitleTw}- for custom conversion in title
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if(in_array('T', $flags)){
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$this->mTitleFromFlag = true;
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$this->mTitleDisplay = $disp;
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}
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else
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$text .= $disp;
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// use syntax -{A|zh:WordZh;zh-tw:WordTw}- to introduce a custom mapping between
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// words WordZh and WordTw in the whole text
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if(in_array('A', $flags)) {
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/* fill in the missing variants, if any,
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with fallbacks */
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foreach($this->mVariants as $v) {
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if(!array_key_exists($v, $carray)) {
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$vf = $this->getVariantFallback($v);
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if(array_key_exists($vf, $carray))
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$carray[$v] = $carray[$vf];
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}
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}
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foreach($this->mVariants as $vfrom) {
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if(!array_key_exists($vfrom, $carray))
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continue;
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foreach($this->mVariants as $vto) {
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if($vfrom == $vto)
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continue;
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if(!array_key_exists($vto, $carray))
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continue;
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$this->mTables[$vto]->setPair($carray[$vfrom], $carray[$vto]);
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}
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}
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}
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}
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else {
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$text .= $marked[0];
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}
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if(array_key_exists(1, $marked)){
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if( $this->mDoContentConvert )
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$text .= $this->autoConvert($marked[1]);
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else
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$text .= $marked[1];
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}
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}
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return $text;
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}
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/**
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* parse the manually marked conversion rule
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* @param string $rule the text of the rule
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* @return array of the translation in each variant
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* @private
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*/
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function parseManualRule($rules, $flags=array()) {
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$choice = explode($this->mMarkup['varsep'], $rules);
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$carray = array();
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if(sizeof($choice) == 1) {
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/* a single choice */
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foreach($this->mVariants as $v)
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$carray[$v] = $choice[0];
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}
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else {
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foreach($choice as $c) {
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$v = explode($this->mMarkup['codesep'], $c);
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if(sizeof($v) != 2) // syntax error, skip
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continue;
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$carray[trim($v[0])] = trim($v[1]);
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}
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}
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return $carray;
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}
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/**
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* if a language supports multiple variants, it is
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* possible that non-existing link in one variant
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* actually exists in another variant. this function
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* tries to find it. See e.g. LanguageZh.php
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*
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* @param string $link the name of the link
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* @param mixed $nt the title object of the link
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* @return null the input parameters may be modified upon return
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* @access public
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*/
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function findVariantLink( &$link, &$nt ) {
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global $wgDisableLangConversion;
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$linkBatch = new LinkBatch();
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$ns=NS_MAIN;
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if(is_object($nt))
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$ns = $nt->getNamespace();
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$variants = $this->autoConvertToAllVariants($link);
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if($variants == false) //give up
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return;
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$titles = array();
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foreach( $variants as $v ) {
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if($v != $link){
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$varnt = Title::newFromText( $v, $ns );
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if(!is_null($varnt)){
|
|
$linkBatch->addObj($varnt);
|
|
$titles[]=$varnt;
|
|
}
|
|
}
|
|
}
|
|
|
|
// fetch all variants in single query
|
|
$linkBatch->execute();
|
|
|
|
foreach( $titles as $varnt ) {
|
|
if( $varnt->getArticleID() > 0 ) {
|
|
$nt = $varnt;
|
|
if( !$wgDisableLangConversion )
|
|
$link = $v;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* returns language specific hash options
|
|
*
|
|
* @access public
|
|
*/
|
|
function getExtraHashOptions() {
|
|
$variant = $this->getPreferredVariant();
|
|
return '!' . $variant ;
|
|
}
|
|
|
|
/**
|
|
* get title text as defined in the body of the article text
|
|
*
|
|
* @access public
|
|
*/
|
|
function getParsedTitle() {
|
|
return $this->mTitleDisplay;
|
|
}
|
|
|
|
/**
|
|
* a write lock to the cache
|
|
*
|
|
* @private
|
|
*/
|
|
function lockCache() {
|
|
global $wgMemc;
|
|
$success = false;
|
|
for($i=0; $i<30; $i++) {
|
|
if($success = $wgMemc->add($this->mCacheKey . "lock", 1, 10))
|
|
break;
|
|
sleep(1);
|
|
}
|
|
return $success;
|
|
}
|
|
|
|
/**
|
|
* unlock cache
|
|
*
|
|
* @private
|
|
*/
|
|
function unlockCache() {
|
|
global $wgMemc;
|
|
$wgMemc->delete($this->mCacheKey . "lock");
|
|
}
|
|
|
|
|
|
/**
|
|
* Load default conversion tables
|
|
* This method must be implemented in derived class
|
|
*
|
|
* @private
|
|
*/
|
|
function loadDefaultTables() {
|
|
$name = get_class($this);
|
|
wfDie("Must implement loadDefaultTables() method in class $name");
|
|
}
|
|
|
|
/**
|
|
* load conversion tables either from the cache or the disk
|
|
* @private
|
|
*/
|
|
function loadTables($fromcache=true) {
|
|
global $wgMemc;
|
|
if( $this->mTablesLoaded )
|
|
return;
|
|
wfProfileIn( __METHOD__ );
|
|
$this->mTablesLoaded = true;
|
|
$this->mTables = false;
|
|
if($fromcache) {
|
|
wfProfileIn( __METHOD__.'-cache' );
|
|
$this->mTables = $wgMemc->get( $this->mCacheKey );
|
|
wfProfileOut( __METHOD__.'-cache' );
|
|
}
|
|
if ( !$this->mTables || !isset( $this->mTables[self::CACHE_VERSION_KEY] ) ) {
|
|
wfProfileIn( __METHOD__.'-recache' );
|
|
// not in cache, or we need a fresh reload.
|
|
// we will first load the default tables
|
|
// then update them using things in MediaWiki:Zhconversiontable/*
|
|
$this->loadDefaultTables();
|
|
foreach($this->mVariants as $var) {
|
|
$cached = $this->parseCachedTable($var);
|
|
$this->mTables[$var]->mergeArray($cached);
|
|
}
|
|
|
|
$this->postLoadTables();
|
|
$this->mTables[self::CACHE_VERSION_KEY] = true;
|
|
|
|
if($this->lockCache()) {
|
|
$wgMemc->set($this->mCacheKey, $this->mTables, 43200);
|
|
$this->unlockCache();
|
|
}
|
|
wfProfileOut( __METHOD__.'-recache' );
|
|
}
|
|
wfProfileOut( __METHOD__ );
|
|
}
|
|
|
|
/**
|
|
* Hook for post processig after conversion tables are loaded
|
|
*
|
|
*/
|
|
function postLoadTables() {}
|
|
|
|
/**
|
|
* Reload the conversion tables
|
|
*
|
|
* @private
|
|
*/
|
|
function reloadTables() {
|
|
if($this->mTables)
|
|
unset($this->mTables);
|
|
$this->mTablesLoaded = false;
|
|
$this->loadTables(false);
|
|
}
|
|
|
|
|
|
/**
|
|
* parse the conversion table stored in the cache
|
|
*
|
|
* the tables should be in blocks of the following form:
|
|
|
|
* -{
|
|
* word => word ;
|
|
* word => word ;
|
|
* ...
|
|
* }-
|
|
*
|
|
* to make the tables more manageable, subpages are allowed
|
|
* and will be parsed recursively if $recursive=true
|
|
*
|
|
* @private
|
|
*/
|
|
function parseCachedTable($code, $subpage='', $recursive=true) {
|
|
global $wgMessageCache;
|
|
static $parsed = array();
|
|
|
|
if(!is_object($wgMessageCache))
|
|
return array();
|
|
|
|
$key = 'Conversiontable/'.$code;
|
|
if($subpage)
|
|
$key .= '/' . $subpage;
|
|
|
|
if(array_key_exists($key, $parsed))
|
|
return array();
|
|
|
|
|
|
$txt = $wgMessageCache->get( $key, true, true, true );
|
|
|
|
// get all subpage links of the form
|
|
// [[MediaWiki:conversiontable/zh-xx/...|...]]
|
|
$linkhead = $this->mLangObj->getNsText(NS_MEDIAWIKI) . ':Conversiontable';
|
|
$subs = explode('[[', $txt);
|
|
$sublinks = array();
|
|
foreach( $subs as $sub ) {
|
|
$link = explode(']]', $sub, 2);
|
|
if(count($link) != 2)
|
|
continue;
|
|
$b = explode('|', $link[0]);
|
|
$b = explode('/', trim($b[0]), 3);
|
|
if(count($b)==3)
|
|
$sublink = $b[2];
|
|
else
|
|
$sublink = '';
|
|
|
|
if($b[0] == $linkhead && $b[1] == $code) {
|
|
$sublinks[] = $sublink;
|
|
}
|
|
}
|
|
|
|
|
|
// parse the mappings in this page
|
|
$blocks = explode($this->mMarkup['begin'], $txt);
|
|
array_shift($blocks);
|
|
$ret = array();
|
|
foreach($blocks as $block) {
|
|
$mappings = explode($this->mMarkup['end'], $block, 2);
|
|
$stripped = str_replace(array("'", '"', '*','#'), '', $mappings[0]);
|
|
$table = explode( ';', $stripped );
|
|
foreach( $table as $t ) {
|
|
$m = explode( '=>', $t );
|
|
if( count( $m ) != 2)
|
|
continue;
|
|
// trim any trailling comments starting with '//'
|
|
$tt = explode('//', $m[1], 2);
|
|
$ret[trim($m[0])] = trim($tt[0]);
|
|
}
|
|
}
|
|
$parsed[$key] = true;
|
|
|
|
|
|
// recursively parse the subpages
|
|
if($recursive) {
|
|
foreach($sublinks as $link) {
|
|
$s = $this->parseCachedTable($code, $link, $recursive);
|
|
$ret = array_merge($ret, $s);
|
|
}
|
|
}
|
|
|
|
if ($this->mUcfirst) {
|
|
foreach ($ret as $k => $v) {
|
|
$ret[Language::ucfirst($k)] = Language::ucfirst($v);
|
|
}
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* Enclose a string with the "no conversion" tag. This is used by
|
|
* various functions in the Parser
|
|
*
|
|
* @param string $text text to be tagged for no conversion
|
|
* @return string the tagged text
|
|
*/
|
|
function markNoConversion($text, $noParse=false) {
|
|
# don't mark if already marked
|
|
if(strpos($text, $this->mMarkup['begin']) ||
|
|
strpos($text, $this->mMarkup['end']))
|
|
return $text;
|
|
|
|
$ret = $this->mMarkup['begin'] . $text . $this->mMarkup['end'];
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* convert the sorting key for category links. this should make different
|
|
* keys that are variants of each other map to the same key
|
|
*/
|
|
function convertCategoryKey( $key ) {
|
|
return $key;
|
|
}
|
|
/**
|
|
* hook to refresh the cache of conversion tables when
|
|
* MediaWiki:conversiontable* is updated
|
|
* @private
|
|
*/
|
|
function OnArticleSaveComplete($article, $user, $text, $summary, $isminor, $iswatch, $section, $flags, $revision) {
|
|
$titleobj = $article->getTitle();
|
|
if($titleobj->getNamespace() == NS_MEDIAWIKI) {
|
|
/*
|
|
global $wgContLang; // should be an LanguageZh.
|
|
if(get_class($wgContLang) != 'languagezh')
|
|
return true;
|
|
*/
|
|
$title = $titleobj->getDBkey();
|
|
$t = explode('/', $title, 3);
|
|
$c = count($t);
|
|
if( $c > 1 && $t[0] == 'Conversiontable' ) {
|
|
if(in_array($t[1], $this->mVariants)) {
|
|
$this->reloadTables();
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Armour rendered math against conversion
|
|
* Wrap math into rawoutput -{R| math }- syntax
|
|
*/
|
|
function armourMath($text){
|
|
$ret = $this->mMarkup['begin'] . 'R|' . $text . $this->mMarkup['end'];
|
|
return $ret;
|
|
}
|
|
|
|
|
|
}
|