mirror of
https://github.com/YunoHost-Apps/mediawiki_ynh.git
synced 2024-09-03 19:46:05 +02:00
608 lines
20 KiB
PHP
608 lines
20 KiB
PHP
<?php
|
||
/**
|
||
* Database row sorting.
|
||
*
|
||
* This program is free software; you can redistribute it and/or modify
|
||
* it under the terms of the GNU General Public License as published by
|
||
* the Free Software Foundation; either version 2 of the License, or
|
||
* (at your option) any later version.
|
||
*
|
||
* This program is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
* GNU General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU General Public License along
|
||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||
* http://www.gnu.org/copyleft/gpl.html
|
||
*
|
||
* @file
|
||
*/
|
||
|
||
abstract class Collation {
|
||
static $instance;
|
||
|
||
/**
|
||
* @return Collation
|
||
*/
|
||
static function singleton() {
|
||
if ( !self::$instance ) {
|
||
global $wgCategoryCollation;
|
||
self::$instance = self::factory( $wgCategoryCollation );
|
||
}
|
||
return self::$instance;
|
||
}
|
||
|
||
/**
|
||
* @throws MWException
|
||
* @param $collationName string
|
||
* @return Collation
|
||
*/
|
||
static function factory( $collationName ) {
|
||
switch ( $collationName ) {
|
||
case 'uppercase':
|
||
return new UppercaseCollation;
|
||
case 'identity':
|
||
return new IdentityCollation;
|
||
case 'uca-default':
|
||
return new IcuCollation( 'root' );
|
||
default:
|
||
$match = array();
|
||
if ( preg_match( '/^uca-([a-z@=-]+)$/', $collationName, $match ) ) {
|
||
return new IcuCollation( $match[1] );
|
||
}
|
||
|
||
# Provide a mechanism for extensions to hook in.
|
||
$collationObject = null;
|
||
wfRunHooks( 'Collation::factory', array( $collationName, &$collationObject ) );
|
||
|
||
if ( $collationObject instanceof Collation ) {
|
||
return $collationObject;
|
||
}
|
||
|
||
// If all else fails...
|
||
throw new MWException( __METHOD__ . ": unknown collation type \"$collationName\"" );
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Given a string, convert it to a (hopefully short) key that can be used
|
||
* for efficient sorting. A binary sort according to the sortkeys
|
||
* corresponds to a logical sort of the corresponding strings. Current
|
||
* code expects that a line feed character should sort before all others, but
|
||
* has no other particular expectations (and that one can be changed if
|
||
* necessary).
|
||
*
|
||
* @param string $string UTF-8 string
|
||
* @return string Binary sortkey
|
||
*/
|
||
abstract function getSortKey( $string );
|
||
|
||
/**
|
||
* Given a string, return the logical "first letter" to be used for
|
||
* grouping on category pages and so on. This has to be coordinated
|
||
* carefully with convertToSortkey(), or else the sorted list might jump
|
||
* back and forth between the same "initial letters" or other pathological
|
||
* behavior. For instance, if you just return the first character, but "a"
|
||
* sorts the same as "A" based on getSortKey(), then you might get a
|
||
* list like
|
||
*
|
||
* == A ==
|
||
* * [[Aardvark]]
|
||
*
|
||
* == a ==
|
||
* * [[antelope]]
|
||
*
|
||
* == A ==
|
||
* * [[Ape]]
|
||
*
|
||
* etc., assuming for the sake of argument that $wgCapitalLinks is false.
|
||
*
|
||
* @param string $string UTF-8 string
|
||
* @return string UTF-8 string corresponding to the first letter of input
|
||
*/
|
||
abstract function getFirstLetter( $string );
|
||
}
|
||
|
||
class UppercaseCollation extends Collation {
|
||
var $lang;
|
||
function __construct() {
|
||
// Get a language object so that we can use the generic UTF-8 uppercase
|
||
// function there
|
||
$this->lang = Language::factory( 'en' );
|
||
}
|
||
|
||
function getSortKey( $string ) {
|
||
return $this->lang->uc( $string );
|
||
}
|
||
|
||
function getFirstLetter( $string ) {
|
||
if ( $string[0] == "\0" ) {
|
||
$string = substr( $string, 1 );
|
||
}
|
||
return $this->lang->ucfirst( $this->lang->firstChar( $string ) );
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Collation class that's essentially a no-op.
|
||
*
|
||
* Does sorting based on binary value of the string.
|
||
* Like how things were pre 1.17.
|
||
*/
|
||
class IdentityCollation extends Collation {
|
||
|
||
function getSortKey( $string ) {
|
||
return $string;
|
||
}
|
||
|
||
function getFirstLetter( $string ) {
|
||
global $wgContLang;
|
||
// Copied from UppercaseCollation.
|
||
// I'm kind of unclear on when this could happen...
|
||
if ( $string[0] == "\0" ) {
|
||
$string = substr( $string, 1 );
|
||
}
|
||
return $wgContLang->firstChar( $string );
|
||
}
|
||
}
|
||
|
||
class IcuCollation extends Collation {
|
||
const FIRST_LETTER_VERSION = 1;
|
||
|
||
var $primaryCollator, $mainCollator, $locale;
|
||
var $firstLetterData;
|
||
|
||
/**
|
||
* Unified CJK blocks.
|
||
*
|
||
* The same definition of a CJK block must be used for both Collation and
|
||
* generateCollationData.php. These blocks are omitted from the first
|
||
* letter data, as an optimisation measure and because the default UCA table
|
||
* is pretty useless for sorting Chinese text anyway. Japanese and Korean
|
||
* blocks are not included here, because they are smaller and more useful.
|
||
*/
|
||
static $cjkBlocks = array(
|
||
array( 0x2E80, 0x2EFF ), // CJK Radicals Supplement
|
||
array( 0x2F00, 0x2FDF ), // Kangxi Radicals
|
||
array( 0x2FF0, 0x2FFF ), // Ideographic Description Characters
|
||
array( 0x3000, 0x303F ), // CJK Symbols and Punctuation
|
||
array( 0x31C0, 0x31EF ), // CJK Strokes
|
||
array( 0x3200, 0x32FF ), // Enclosed CJK Letters and Months
|
||
array( 0x3300, 0x33FF ), // CJK Compatibility
|
||
array( 0x3400, 0x4DBF ), // CJK Unified Ideographs Extension A
|
||
array( 0x4E00, 0x9FFF ), // CJK Unified Ideographs
|
||
array( 0xF900, 0xFAFF ), // CJK Compatibility Ideographs
|
||
array( 0xFE30, 0xFE4F ), // CJK Compatibility Forms
|
||
array( 0x20000, 0x2A6DF ), // CJK Unified Ideographs Extension B
|
||
array( 0x2A700, 0x2B73F ), // CJK Unified Ideographs Extension C
|
||
array( 0x2B740, 0x2B81F ), // CJK Unified Ideographs Extension D
|
||
array( 0x2F800, 0x2FA1F ), // CJK Compatibility Ideographs Supplement
|
||
);
|
||
|
||
/**
|
||
* Additional characters (or character groups) to be considered separate
|
||
* letters for given languages, or to be removed from the list of such
|
||
* letters (denoted by keys starting with '-').
|
||
*
|
||
* These are additions to (or subtractions from) the data stored in the
|
||
* first-letters-root.ser file (which among others includes full basic latin,
|
||
* cyrillic and greek alphabets).
|
||
*
|
||
* "Separate letter" is a letter that would have a separate heading/section
|
||
* for it in a dictionary or a phone book in this language. This data isn't
|
||
* used for sorting (the ICU library handles that), only for deciding which
|
||
* characters (or character groups) to use as headings.
|
||
*
|
||
* Initially generated based on the primary level of Unicode collation
|
||
* tailorings available at http://developer.mimer.com/charts/tailorings.htm ,
|
||
* later modified.
|
||
*
|
||
* Empty arrays are intended; this signifies that the data for the language is
|
||
* available and that there are, in fact, no additional letters to consider.
|
||
*/
|
||
static $tailoringFirstLetters = array(
|
||
// Verified by native speakers
|
||
'be' => array( "Ё" ),
|
||
'be-tarask' => array( "Ё" ),
|
||
'en' => array(),
|
||
'fi' => array( "Å", "Ä", "Ö" ),
|
||
'hu' => array( "Cs", "Dz", "Dzs", "Gy", "Ly", "Ny", "Ö", "Sz", "Ty", "Ü", "Zs" ),
|
||
'it' => array(),
|
||
'pl' => array( "Ą", "Ć", "Ę", "Ł", "Ń", "Ó", "Ś", "Ź", "Ż" ),
|
||
'pt' => array(),
|
||
'ru' => array(),
|
||
'sv' => array( "Å", "Ä", "Ö" ),
|
||
'sv@collation=standard' => array( "Å", "Ä", "Ö" ),
|
||
'uk' => array( "Ґ", "Ь" ),
|
||
'vi' => array( "Ă", "Â", "Đ", "Ê", "Ô", "Ơ", "Ư" ),
|
||
// Not verified, but likely correct
|
||
'af' => array(),
|
||
'ast' => array( "Ch", "Ll", "Ñ" ),
|
||
'az' => array( "Ç", "Ə", "Ğ", "İ", "Ö", "Ş", "Ü" ),
|
||
'bg' => array(),
|
||
'br' => array( "Ch", "C'h" ),
|
||
'bs' => array( "Č", "Ć", "Dž", "Đ", "Lj", "Nj", "Š", "Ž" ),
|
||
'ca' => array(),
|
||
'co' => array(),
|
||
'cs' => array( "Č", "Ch", "Ř", "Š", "Ž" ),
|
||
'cy' => array( "Ch", "Dd", "Ff", "Ng", "Ll", "Ph", "Rh", "Th" ),
|
||
'da' => array( "Æ", "Ø", "Å" ),
|
||
'de' => array(),
|
||
'dsb' => array( "Č", "Ć", "Dź", "Ě", "Ch", "Ł", "Ń", "Ŕ", "Š", "Ś", "Ž", "Ź" ),
|
||
'el' => array(),
|
||
'eo' => array( "Ĉ", "Ĝ", "Ĥ", "Ĵ", "Ŝ", "Ŭ" ),
|
||
'es' => array( "Ñ" ),
|
||
'et' => array( "Š", "Ž", "Õ", "Ä", "Ö", "Ü" ),
|
||
'eu' => array( "Ñ" ),
|
||
'fa' => array( "آ", "ء", "ه" ),
|
||
'fo' => array( "Á", "Ð", "Í", "Ó", "Ú", "Ý", "Æ", "Ø", "Å" ),
|
||
'fr' => array(),
|
||
'fur' => array( "À", "Á", "Â", "È", "Ì", "Ò", "Ù" ),
|
||
'fy' => array(),
|
||
'ga' => array(),
|
||
'gd' => array(),
|
||
'gl' => array( "Ch", "Ll", "Ñ" ),
|
||
'hr' => array( "Č", "Ć", "Dž", "Đ", "Lj", "Nj", "Š", "Ž" ),
|
||
'hsb' => array( "Č", "Dź", "Ě", "Ch", "Ł", "Ń", "Ř", "Š", "Ć", "Ž" ),
|
||
'is' => array( "Á", "Ð", "É", "Í", "Ó", "Ú", "Ý", "Þ", "Æ", "Ö", "Å" ),
|
||
'kk' => array( "Ү", "І" ),
|
||
'kl' => array( "Æ", "Ø", "Å" ),
|
||
'ku' => array( "Ç", "Ê", "Î", "Ş", "Û" ),
|
||
'ky' => array( "Ё" ),
|
||
'la' => array(),
|
||
'lb' => array(),
|
||
'lt' => array( "Č", "Š", "Ž" ),
|
||
'lv' => array( "Č", "Ģ", "Ķ", "Ļ", "Ņ", "Š", "Ž" ),
|
||
'mk' => array(),
|
||
'mo' => array( "Ă", "Â", "Î", "Ş", "Ţ" ),
|
||
'mt' => array( "Ċ", "Ġ", "Għ", "Ħ", "Ż" ),
|
||
'nl' => array(),
|
||
'no' => array( "Æ", "Ø", "Å" ),
|
||
'oc' => array(),
|
||
'rm' => array(),
|
||
'ro' => array( "Ă", "Â", "Î", "Ş", "Ţ" ),
|
||
'rup' => array( "Ă", "Â", "Î", "Ľ", "Ń", "Ş", "Ţ" ),
|
||
'sco' => array(),
|
||
'sk' => array( "Ä", "Č", "Ch", "Ô", "Š", "Ž" ),
|
||
'sl' => array( "Č", "Š", "Ž" ),
|
||
'smn' => array( "Á", "Č", "Đ", "Ŋ", "Š", "Ŧ", "Ž", "Æ", "Ø", "Å", "Ä", "Ö" ),
|
||
'sq' => array( "Ç", "Dh", "Ë", "Gj", "Ll", "Nj", "Rr", "Sh", "Th", "Xh", "Zh" ),
|
||
'sr' => array(),
|
||
'tk' => array( "Ç", "Ä", "Ž", "Ň", "Ö", "Ş", "Ü", "Ý" ),
|
||
'tl' => array( "Ñ", "Ng" ),
|
||
'tr' => array( "Ç", "Ğ", "İ", "Ö", "Ş", "Ü" ),
|
||
'tt' => array( "Ә", "Ө", "Ү", "Җ", "Ң", "Һ" ),
|
||
'uz' => array( "Ch", "G'", "Ng", "O'", "Sh" ),
|
||
);
|
||
|
||
const RECORD_LENGTH = 14;
|
||
|
||
function __construct( $locale ) {
|
||
if ( !extension_loaded( 'intl' ) ) {
|
||
throw new MWException( 'An ICU collation was requested, ' .
|
||
'but the intl extension is not available.' );
|
||
}
|
||
$this->locale = $locale;
|
||
$this->mainCollator = Collator::create( $locale );
|
||
if ( !$this->mainCollator ) {
|
||
throw new MWException( "Invalid ICU locale specified for collation: $locale" );
|
||
}
|
||
|
||
$this->primaryCollator = Collator::create( $locale );
|
||
$this->primaryCollator->setStrength( Collator::PRIMARY );
|
||
}
|
||
|
||
function getSortKey( $string ) {
|
||
// intl extension produces non null-terminated
|
||
// strings. Appending '' fixes it so that it doesn't generate
|
||
// a warning on each access in debug php.
|
||
wfSuppressWarnings();
|
||
$key = $this->mainCollator->getSortKey( $string ) . '';
|
||
wfRestoreWarnings();
|
||
return $key;
|
||
}
|
||
|
||
function getPrimarySortKey( $string ) {
|
||
wfSuppressWarnings();
|
||
$key = $this->primaryCollator->getSortKey( $string ) . '';
|
||
wfRestoreWarnings();
|
||
return $key;
|
||
}
|
||
|
||
function getFirstLetter( $string ) {
|
||
$string = strval( $string );
|
||
if ( $string === '' ) {
|
||
return '';
|
||
}
|
||
|
||
// Check for CJK
|
||
$firstChar = mb_substr( $string, 0, 1, 'UTF-8' );
|
||
if ( ord( $firstChar ) > 0x7f
|
||
&& self::isCjk( utf8ToCodepoint( $firstChar ) ) )
|
||
{
|
||
return $firstChar;
|
||
}
|
||
|
||
$sortKey = $this->getPrimarySortKey( $string );
|
||
|
||
// Do a binary search to find the correct letter to sort under
|
||
$min = $this->findLowerBound(
|
||
array( $this, 'getSortKeyByLetterIndex' ),
|
||
$this->getFirstLetterCount(),
|
||
'strcmp',
|
||
$sortKey );
|
||
|
||
if ( $min === false ) {
|
||
// Before the first letter
|
||
return '';
|
||
}
|
||
return $this->getLetterByIndex( $min );
|
||
}
|
||
|
||
function getFirstLetterData() {
|
||
if ( $this->firstLetterData !== null ) {
|
||
return $this->firstLetterData;
|
||
}
|
||
|
||
$cache = wfGetCache( CACHE_ANYTHING );
|
||
$cacheKey = wfMemcKey( 'first-letters', $this->locale );
|
||
$cacheEntry = $cache->get( $cacheKey );
|
||
|
||
if ( $cacheEntry && isset( $cacheEntry['version'] )
|
||
&& $cacheEntry['version'] == self::FIRST_LETTER_VERSION
|
||
) {
|
||
$this->firstLetterData = $cacheEntry;
|
||
return $this->firstLetterData;
|
||
}
|
||
|
||
// Generate data from serialized data file
|
||
|
||
if ( isset( self::$tailoringFirstLetters[$this->locale] ) ) {
|
||
$letters = wfGetPrecompiledData( "first-letters-root.ser" );
|
||
// Append additional characters
|
||
$letters = array_merge( $letters, self::$tailoringFirstLetters[$this->locale] );
|
||
// Remove unnecessary ones, if any
|
||
if ( isset( self::$tailoringFirstLetters['-' . $this->locale] ) ) {
|
||
$letters = array_diff( $letters, self::$tailoringFirstLetters['-' . $this->locale] );
|
||
}
|
||
} else {
|
||
$letters = wfGetPrecompiledData( "first-letters-{$this->locale}.ser" );
|
||
if ( $letters === false ) {
|
||
throw new MWException( "MediaWiki does not support ICU locale " .
|
||
"\"{$this->locale}\"" );
|
||
}
|
||
}
|
||
|
||
// Sort the letters.
|
||
//
|
||
// It's impossible to have the precompiled data file properly sorted,
|
||
// because the sort order changes depending on ICU version. If the
|
||
// array is not properly sorted, the binary search will return random
|
||
// results.
|
||
//
|
||
// We also take this opportunity to remove primary collisions.
|
||
$letterMap = array();
|
||
foreach ( $letters as $letter ) {
|
||
$key = $this->getPrimarySortKey( $letter );
|
||
if ( isset( $letterMap[$key] ) ) {
|
||
// Primary collision
|
||
// Keep whichever one sorts first in the main collator
|
||
if ( $this->mainCollator->compare( $letter, $letterMap[$key] ) < 0 ) {
|
||
$letterMap[$key] = $letter;
|
||
}
|
||
} else {
|
||
$letterMap[$key] = $letter;
|
||
}
|
||
}
|
||
ksort( $letterMap, SORT_STRING );
|
||
// Remove duplicate prefixes. Basically if something has a sortkey
|
||
// which is a prefix of some other sortkey, then it is an
|
||
// expansion and probably should not be considered a section
|
||
// header.
|
||
//
|
||
// For example 'þ' is sometimes sorted as if it is the letters
|
||
// 'th'. Other times it is its own primary element. Another
|
||
// example is '₨'. Sometimes its a currency symbol. Sometimes it
|
||
// is an 'R' followed by an 's'.
|
||
//
|
||
// Additionally an expanded element should always sort directly
|
||
// after its first element due to they way sortkeys work.
|
||
//
|
||
// UCA sortkey elements are of variable length but no collation
|
||
// element should be a prefix of some other element, so I think
|
||
// this is safe. See:
|
||
// * https://ssl.icu-project.org/repos/icu/icuhtml/trunk/design/collation/ICU_collation_design.htm
|
||
// * http://site.icu-project.org/design/collation/uca-weight-allocation
|
||
//
|
||
// Additionally, there is something called primary compression to
|
||
// worry about. Basically, if you have two primary elements that
|
||
// are more than one byte and both start with the same byte then
|
||
// the first byte is dropped on the second primary. Additionally
|
||
// either \x03 or \xFF may be added to mean that the next primary
|
||
// does not start with the first byte of the first primary.
|
||
//
|
||
// This shouldn't matter much, as the first primary is not
|
||
// changed, and that is what we are comparing against.
|
||
//
|
||
// tl;dr: This makes some assumptions about how icu implements
|
||
// collations. It seems incredibly unlikely these assumptions
|
||
// will change, but nonetheless they are assumptions.
|
||
|
||
$prev = false;
|
||
$duplicatePrefixes = array();
|
||
foreach ( $letterMap as $key => $value ) {
|
||
// Remove terminator byte. Otherwise the prefix
|
||
// comparison will get hung up on that.
|
||
$trimmedKey = rtrim( $key, "\0" );
|
||
if ( $prev === false || $prev === '' ) {
|
||
$prev = $trimmedKey;
|
||
// We don't yet have a collation element
|
||
// to compare against, so continue.
|
||
continue;
|
||
}
|
||
|
||
// Due to the fact the array is sorted, we only have
|
||
// to compare with the element directly previous
|
||
// to the current element (skipping expansions).
|
||
// An element "X" will always sort directly
|
||
// before "XZ" (Unless we have "XY", but we
|
||
// do not update $prev in that case).
|
||
if ( substr( $trimmedKey, 0, strlen( $prev ) ) === $prev ) {
|
||
$duplicatePrefixes[] = $key;
|
||
// If this is an expansion, we don't want to
|
||
// compare the next element to this element,
|
||
// but to what is currently $prev
|
||
continue;
|
||
}
|
||
$prev = $trimmedKey;
|
||
}
|
||
foreach ( $duplicatePrefixes as $badKey ) {
|
||
wfDebug( "Removing '{$letterMap[$badKey]}' from first letters." );
|
||
unset( $letterMap[$badKey] );
|
||
// This code assumes that unsetting does not change sort order.
|
||
}
|
||
$data = array(
|
||
'chars' => array_values( $letterMap ),
|
||
'keys' => array_keys( $letterMap ),
|
||
'version' => self::FIRST_LETTER_VERSION,
|
||
);
|
||
|
||
// Reduce memory usage before caching
|
||
unset( $letterMap );
|
||
|
||
// Save to cache
|
||
$this->firstLetterData = $data;
|
||
$cache->set( $cacheKey, $data, 86400 * 7 /* 1 week */ );
|
||
return $data;
|
||
}
|
||
|
||
function getLetterByIndex( $index ) {
|
||
if ( $this->firstLetterData === null ) {
|
||
$this->getFirstLetterData();
|
||
}
|
||
return $this->firstLetterData['chars'][$index];
|
||
}
|
||
|
||
function getSortKeyByLetterIndex( $index ) {
|
||
if ( $this->firstLetterData === null ) {
|
||
$this->getFirstLetterData();
|
||
}
|
||
return $this->firstLetterData['keys'][$index];
|
||
}
|
||
|
||
function getFirstLetterCount() {
|
||
if ( $this->firstLetterData === null ) {
|
||
$this->getFirstLetterData();
|
||
}
|
||
return count( $this->firstLetterData['chars'] );
|
||
}
|
||
|
||
/**
|
||
* Do a binary search, and return the index of the largest item that sorts
|
||
* less than or equal to the target value.
|
||
*
|
||
* @param array $valueCallback A function to call to get the value with
|
||
* a given array index.
|
||
* @param int $valueCount The number of items accessible via $valueCallback,
|
||
* indexed from 0 to $valueCount - 1
|
||
* @param array $comparisonCallback A callback to compare two values, returning
|
||
* -1, 0 or 1 in the style of strcmp().
|
||
* @param string $target The target value to find.
|
||
*
|
||
* @return int|bool The item index of the lower bound, or false if the target value
|
||
* sorts before all items.
|
||
*/
|
||
function findLowerBound( $valueCallback, $valueCount, $comparisonCallback, $target ) {
|
||
if ( $valueCount === 0 ) {
|
||
return false;
|
||
}
|
||
|
||
$min = 0;
|
||
$max = $valueCount;
|
||
do {
|
||
$mid = $min + ( ( $max - $min ) >> 1 );
|
||
$item = call_user_func( $valueCallback, $mid );
|
||
$comparison = call_user_func( $comparisonCallback, $target, $item );
|
||
if ( $comparison > 0 ) {
|
||
$min = $mid;
|
||
} elseif ( $comparison == 0 ) {
|
||
$min = $mid;
|
||
break;
|
||
} else {
|
||
$max = $mid;
|
||
}
|
||
} while ( $min < $max - 1 );
|
||
|
||
if ( $min == 0 ) {
|
||
$item = call_user_func( $valueCallback, $min );
|
||
$comparison = call_user_func( $comparisonCallback, $target, $item );
|
||
if ( $comparison < 0 ) {
|
||
// Before the first item
|
||
return false;
|
||
}
|
||
}
|
||
return $min;
|
||
}
|
||
|
||
static function isCjk( $codepoint ) {
|
||
foreach ( self::$cjkBlocks as $block ) {
|
||
if ( $codepoint >= $block[0] && $codepoint <= $block[1] ) {
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* Return the version of ICU library used by PHP's intl extension,
|
||
* or false when the extension is not installed of the version
|
||
* can't be determined.
|
||
*
|
||
* The constant INTL_ICU_VERSION this function refers to isn't really
|
||
* documented. It is available since PHP 5.3.7 (see PHP bug 54561).
|
||
* This function will return false on older PHPs.
|
||
*
|
||
* @since 1.21
|
||
* @return string|false
|
||
*/
|
||
static function getICUVersion() {
|
||
return defined( 'INTL_ICU_VERSION' ) ? INTL_ICU_VERSION : false;
|
||
}
|
||
|
||
/**
|
||
* Return the version of Unicode appropriate for the version of ICU library
|
||
* currently in use, or false when it can't be determined.
|
||
*
|
||
* @since 1.21
|
||
* @return string|false
|
||
*/
|
||
static function getUnicodeVersionForICU() {
|
||
$icuVersion = IcuCollation::getICUVersion();
|
||
if ( !$icuVersion ) {
|
||
return false;
|
||
}
|
||
|
||
$versionPrefix = substr( $icuVersion, 0, 3 );
|
||
// Source: http://site.icu-project.org/download
|
||
$map = array(
|
||
'50.' => '6.2',
|
||
'49.' => '6.1',
|
||
'4.8' => '6.0',
|
||
'4.6' => '6.0',
|
||
'4.4' => '5.2',
|
||
'4.2' => '5.1',
|
||
'4.0' => '5.1',
|
||
'3.8' => '5.0',
|
||
'3.6' => '5.0',
|
||
'3.4' => '4.1',
|
||
);
|
||
|
||
if ( isset( $map[$versionPrefix] ) ) {
|
||
return $map[$versionPrefix];
|
||
} else {
|
||
return false;
|
||
}
|
||
}
|
||
}
|