22cb66c175
Can't just clear cache on production, as this
now uses per-server apc instance.
Follow-up 486f64f283
Change-Id: I88df6d5a91c86ef687543d1a6988e0ec050bbfce
571 lines
19 KiB
PHP
571 lines
19 KiB
PHP
<?php
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/**
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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*/
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/**
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* @since 1.16.3
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*/
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class IcuCollation extends Collation {
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const FIRST_LETTER_VERSION = 3;
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/** @var Collator */
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private $primaryCollator;
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/** @var Collator */
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private $mainCollator;
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/** @var string */
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private $locale;
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/** @var Language */
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protected $digitTransformLanguage;
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/** @var boolean */
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private $useNumericCollation = false;
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/** @var array */
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private $firstLetterData;
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/**
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* Unified CJK blocks.
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*
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* The same definition of a CJK block must be used for both Collation and
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* generateCollationData.php. These blocks are omitted from the first
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* letter data, as an optimisation measure and because the default UCA table
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* is pretty useless for sorting Chinese text anyway. Japanese and Korean
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* blocks are not included here, because they are smaller and more useful.
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*/
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private static $cjkBlocks = [
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[ 0x2E80, 0x2EFF ], // CJK Radicals Supplement
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[ 0x2F00, 0x2FDF ], // Kangxi Radicals
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[ 0x2FF0, 0x2FFF ], // Ideographic Description Characters
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[ 0x3000, 0x303F ], // CJK Symbols and Punctuation
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[ 0x31C0, 0x31EF ], // CJK Strokes
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[ 0x3200, 0x32FF ], // Enclosed CJK Letters and Months
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[ 0x3300, 0x33FF ], // CJK Compatibility
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[ 0x3400, 0x4DBF ], // CJK Unified Ideographs Extension A
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[ 0x4E00, 0x9FFF ], // CJK Unified Ideographs
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[ 0xF900, 0xFAFF ], // CJK Compatibility Ideographs
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[ 0xFE30, 0xFE4F ], // CJK Compatibility Forms
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[ 0x20000, 0x2A6DF ], // CJK Unified Ideographs Extension B
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[ 0x2A700, 0x2B73F ], // CJK Unified Ideographs Extension C
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[ 0x2B740, 0x2B81F ], // CJK Unified Ideographs Extension D
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[ 0x2F800, 0x2FA1F ], // CJK Compatibility Ideographs Supplement
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];
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/**
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* Additional characters (or character groups) to be considered separate
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* letters for given languages, or to be removed from the list of such
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* letters (denoted by keys starting with '-').
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*
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* These are additions to (or subtractions from) the data stored in the
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* first-letters-root.ser file (which among others includes full basic latin,
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* cyrillic and greek alphabets).
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*
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* "Separate letter" is a letter that would have a separate heading/section
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* for it in a dictionary or a phone book in this language. This data isn't
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* used for sorting (the ICU library handles that), only for deciding which
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* characters (or character groups) to use as headings.
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*
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* Initially generated based on the primary level of Unicode collation
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* tailorings available at http://developer.mimer.com/charts/tailorings.htm ,
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* later modified.
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*
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* Empty arrays are intended; this signifies that the data for the language is
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* available and that there are, in fact, no additional letters to consider.
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*/
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private static $tailoringFirstLetters = [
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'af' => [],
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'am' => [],
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'ar' => [],
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'as' => [ "\xe0\xa6\x82", "\xe0\xa6\x81", "\xe0\xa6\x83", "\xe0\xa7\x8e", "ক্ষ " ],
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'ast' => [ "Ch", "Ll", "Ñ" ], // not in libicu
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'az' => [ "Ç", "Ə", "Ğ", "İ", "Ö", "Ş", "Ü" ],
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'be' => [ "Ё" ],
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'be-tarask' => [ "Ё" ],
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'bg' => [],
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'bn' => [ 'ং', 'ঃ', 'ঁ' ],
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'bn@collation=traditional' => [
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'ং', 'ঃ', 'ঁ', 'ক্', 'খ্', 'গ্', 'ঘ্', 'ঙ্', 'চ্', 'ছ্', 'জ্', 'ঝ্',
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'ঞ্', 'ট্', 'ঠ্', 'ড্', 'ঢ্', 'ণ্', 'ৎ', 'থ্', 'দ্', 'ধ্', 'ন্', 'প্',
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'ফ্', 'ব্', 'ভ্', 'ম্', 'য্', 'র্', 'ৰ্', 'ল্', 'ৱ্', 'শ্', 'ষ্', 'স্', 'হ্'
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],
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'bo' => [],
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'br' => [ "Ch", "C'h" ],
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'bs' => [ "Č", "Ć", "Dž", "Đ", "Lj", "Nj", "Š", "Ž" ],
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'bs-Cyrl' => [],
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'ca' => [],
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'chr' => [],
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'co' => [], // not in libicu
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'cs' => [ "Č", "Ch", "Ř", "Š", "Ž" ],
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'cy' => [ "Ch", "Dd", "Ff", "Ng", "Ll", "Ph", "Rh", "Th" ],
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'da' => [ "Æ", "Ø", "Å" ],
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'de' => [],
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'de-AT@collation=phonebook' => [ 'ä', 'ö', 'ü', 'ß' ],
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'dsb' => [ "Č", "Ć", "Dź", "Ě", "Ch", "Ł", "Ń", "Ŕ", "Š", "Ś", "Ž", "Ź" ],
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'ee' => [ "Dz", "Ɖ", "Ɛ", "Ƒ", "Gb", "Ɣ", "Kp", "Ny", "Ŋ", "Ɔ", "Ts", "Ʋ" ],
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'el' => [],
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'en' => [],
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'eo' => [ "Ĉ", "Ĝ", "Ĥ", "Ĵ", "Ŝ", "Ŭ" ],
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'es' => [ "Ñ" ],
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'et' => [ "Š", "Ž", "Õ", "Ä", "Ö", "Ü", "W" ], // added W for CollationEt (xx-uca-et)
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'eu' => [ "Ñ" ], // not in libicu
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'fa' => [
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// RTL, let's put each letter on a new line
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"آ",
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"ء",
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"ه",
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"ا",
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"و"
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],
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'fi' => [ "Å", "Ä", "Ö" ],
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'fil' => [ "Ñ", "Ng" ],
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'fo' => [ "Á", "Ð", "Í", "Ó", "Ú", "Ý", "Æ", "Ø", "Å" ],
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'fr' => [],
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'fr-CA' => [], // fr-CA sorts accents slightly different from fr.
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'fur' => [ "À", "Á", "Â", "È", "Ì", "Ò", "Ù" ], // not in libicu
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'fy' => [], // not in libicu
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'ga' => [],
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'gd' => [], // not in libicu
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'gl' => [ "Ch", "Ll", "Ñ" ],
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'gu' => [ "\xe0\xaa\x82", "\xe0\xaa\x83", "\xe0\xaa\x81", "\xe0\xaa\xb3" ],
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'ha' => [ 'Ɓ', 'Ɗ', 'Ƙ', 'Sh', 'Ts', 'Ƴ' ],
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'haw' => [ 'ʻ' ],
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'he' => [],
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'hi' => [ "\xe0\xa4\x82", "\xe0\xa4\x83" ],
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'hr' => [ "Č", "Ć", "Dž", "Đ", "Lj", "Nj", "Š", "Ž" ],
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'hsb' => [ "Č", "Dź", "Ě", "Ch", "Ł", "Ń", "Ř", "Š", "Ć", "Ž" ],
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'hu' => [ "Cs", "Dz", "Dzs", "Gy", "Ly", "Ny", "Ö", "Sz", "Ty", "Ü", "Zs" ],
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'hy' => [ "և" ],
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'id' => [],
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'ig' => [ "Ch", "Gb", "Gh", "Gw", "Ị", "Kp", "Kw", "Ṅ", "Nw", "Ny", "Ọ", "Sh", "Ụ" ],
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'is' => [ "Á", "Ð", "É", "Í", "Ó", "Ú", "Ý", "Þ", "Æ", "Ö", "Å" ],
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'it' => [],
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'ka' => [],
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'kk' => [ "Ү", "І" ],
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'kl' => [ "Æ", "Ø", "Å" ],
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'km' => [
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"រ", "ឫ", "ឬ", "ល", "ឭ", "ឮ", "\xe1\x9e\xbb\xe1\x9f\x86",
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"\xe1\x9f\x86", "\xe1\x9e\xb6\xe1\x9f\x86", "\xe1\x9f\x87",
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"\xe1\x9e\xb7\xe1\x9f\x87", "\xe1\x9e\xbb\xe1\x9f\x87",
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"\xe1\x9f\x81\xe1\x9f\x87", "\xe1\x9f\x84\xe1\x9f\x87",
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],
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'kn' => [ "\xe0\xb2\x81", "\xe0\xb2\x83", "\xe0\xb3\xb1", "\xe0\xb3\xb2" ],
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'kok' => [ "\xe0\xa4\x82", "\xe0\xa4\x83", "ळ", "क्ष" ],
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'ku' => [ "Ç", "Ê", "Î", "Ş", "Û" ], // not in libicu
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'ky' => [ "Ё" ],
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'la' => [], // not in libicu
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'lb' => [],
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'lkt' => [ 'Č', 'Ǧ', 'Ȟ', 'Š', 'Ž' ],
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'ln' => [ 'Ɛ' ],
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'lo' => [],
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'lt' => [ "Č", "Š", "Ž" ],
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'lv' => [ "Č", "Ģ", "Ķ", "Ļ", "Ņ", "Š", "Ž" ],
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'mk' => [ "Ѓ", "Ќ" ],
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'ml' => [],
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'mn' => [],
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'mo' => [ "Ă", "Â", "Î", "Ş", "Ţ" ], // not in libicu
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'mr' => [ "\xe0\xa4\x82", "\xe0\xa4\x83", "ळ", "क्ष", "ज्ञ" ],
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'ms' => [],
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'mt' => [ "Ċ", "Ġ", "Għ", "Ħ", "Ż" ],
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'nb' => [ "Æ", "Ø", "Å" ],
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'ne' => [],
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'nl' => [],
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'nn' => [ "Æ", "Ø", "Å" ],
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'no' => [ "Æ", "Ø", "Å" ], // not in libicu. You should probably use nb or nn instead.
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'oc' => [], // not in libicu
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'om' => [ 'Ch', 'Dh', 'Kh', 'Ny', 'Ph', 'Sh' ],
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'or' => [ "\xe0\xac\x81", "\xe0\xac\x82", "\xe0\xac\x83", "କ୍ଷ" ],
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'pa' => [ "\xe0\xa9\x8d" ],
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'pl' => [ "Ą", "Ć", "Ę", "Ł", "Ń", "Ó", "Ś", "Ź", "Ż" ],
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'pt' => [],
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'rm' => [], // not in libicu
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'ro' => [ "Ă", "Â", "Î", "Ș", "Ț" ],
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'ru' => [],
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'rup' => [ "Ă", "Â", "Î", "Ľ", "Ń", "Ş", "Ţ" ], // not in libicu
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'sco' => [],
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'se' => [
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'Á', 'Č', 'Ʒ', 'Ǯ', 'Đ', 'Ǧ', 'Ǥ', 'Ǩ', 'Ŋ',
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'Š', 'Ŧ', 'Ž', 'Ø', 'Æ', 'Ȧ', 'Ä', 'Ö'
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],
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'si' => [ "\xe0\xb6\x82", "\xe0\xb6\x83", "\xe0\xb6\xa4" ],
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'sk' => [ "Ä", "Č", "Ch", "Ô", "Š", "Ž" ],
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'sl' => [ "Č", "Š", "Ž" ],
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'smn' => [ "Á", "Č", "Đ", "Ŋ", "Š", "Ŧ", "Ž", "Æ", "Ø", "Å", "Ä", "Ö" ],
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'sq' => [ "Ç", "Dh", "Ë", "Gj", "Ll", "Nj", "Rr", "Sh", "Th", "Xh", "Zh" ],
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'sr' => [],
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'sr-Latn' => [ "Č", "Ć", "Dž", "Đ", "Lj", "Nj", "Š", "Ž" ],
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'sv' => [ "Å", "Ä", "Ö" ],
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'sv@collation=standard' => [ "Å", "Ä", "Ö" ],
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'sw' => [],
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'ta' => [
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"\xE0\xAE\x82", "ஃ", "க்ஷ", "க்", "ங்", "ச்", "ஞ்", "ட்", "ண்", "த்", "ந்",
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"ப்", "ம்", "ய்", "ர்", "ல்", "வ்", "ழ்", "ள்", "ற்", "ன்", "ஜ்", "ஶ்", "ஷ்",
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"ஸ்", "ஹ்", "க்ஷ்"
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],
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'te' => [ "\xe0\xb0\x81", "\xe0\xb0\x82", "\xe0\xb0\x83" ],
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'th' => [ "ฯ", "\xe0\xb9\x86", "\xe0\xb9\x8d", "\xe0\xb8\xba" ],
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'tk' => [ "Ç", "Ä", "Ž", "Ň", "Ö", "Ş", "Ü", "Ý" ],
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'tl' => [ "Ñ", "Ng" ], // not in libicu
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'to' => [ "Ng", "ʻ" ],
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'tr' => [ "Ç", "Ğ", "İ", "Ö", "Ş", "Ü" ],
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'tt' => [ "Ә", "Ө", "Ү", "Җ", "Ң", "Һ" ], // not in libicu
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'uk' => [ "Ґ", "Ь" ],
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'uz' => [ "Ch", "G'", "Ng", "O'", "Sh" ], // not in libicu
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'vi' => [ "Ă", "Â", "Đ", "Ê", "Ô", "Ơ", "Ư" ],
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'vo' => [ "Ä", "Ö", "Ü" ],
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'yi' => [
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"\xd7\x91\xd6\xbf", "\xd7\x9b\xd6\xbc", "\xd7\xa4\xd6\xbc",
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"\xd7\xa9\xd7\x82", "\xd7\xaa\xd6\xbc"
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],
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'yo' => [ "Ẹ", "Gb", "Ọ", "Ṣ" ],
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'zu' => [],
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];
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/**
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* @since 1.16.3
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*/
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const RECORD_LENGTH = 14;
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public function __construct( $locale ) {
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if ( !extension_loaded( 'intl' ) ) {
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throw new MWException( 'An ICU collation was requested, ' .
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'but the intl extension is not available.' );
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}
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$this->locale = $locale;
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// Drop everything after the '@' in locale's name
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$localeParts = explode( '@', $locale );
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$this->digitTransformLanguage = Language::factory( $locale === 'root' ? 'en' : $localeParts[0] );
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$this->mainCollator = Collator::create( $locale );
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if ( !$this->mainCollator ) {
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throw new MWException( "Invalid ICU locale specified for collation: $locale" );
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}
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$this->primaryCollator = Collator::create( $locale );
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$this->primaryCollator->setStrength( Collator::PRIMARY );
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// If the special suffix for numeric collation is present, turn on numeric collation.
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if ( substr( $locale, -5, 5 ) === '-u-kn' ) {
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$this->useNumericCollation = true;
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// Strip off the special suffix so it doesn't trip up fetchFirstLetterData().
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$this->locale = substr( $this->locale, 0, -5 );
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$this->mainCollator->setAttribute( Collator::NUMERIC_COLLATION, Collator::ON );
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$this->primaryCollator->setAttribute( Collator::NUMERIC_COLLATION, Collator::ON );
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}
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}
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public function getSortKey( $string ) {
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return $this->mainCollator->getSortKey( $string );
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}
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public function getPrimarySortKey( $string ) {
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return $this->primaryCollator->getSortKey( $string );
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}
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public function getFirstLetter( $string ) {
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$string = strval( $string );
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if ( $string === '' ) {
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return '';
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}
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$firstChar = mb_substr( $string, 0, 1, 'UTF-8' );
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// If the first character is a CJK character, just return that character.
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if ( ord( $firstChar ) > 0x7f && self::isCjk( UtfNormal\Utils::utf8ToCodepoint( $firstChar ) ) ) {
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return $firstChar;
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}
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$sortKey = $this->getPrimarySortKey( $string );
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// Do a binary search to find the correct letter to sort under
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$min = ArrayUtils::findLowerBound(
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[ $this, 'getSortKeyByLetterIndex' ],
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$this->getFirstLetterCount(),
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'strcmp',
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$sortKey );
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if ( $min === false ) {
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// Before the first letter
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return '';
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}
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$sortLetter = $this->getLetterByIndex( $min );
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if ( $this->useNumericCollation ) {
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// If the sort letter is a number, return '0–9' (or localized equivalent).
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// ASCII value of 0 is 48. ASCII value of 9 is 57.
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// Note that this also applies to non-Arabic numerals since they are
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// mapped to Arabic numeral sort letters. For example, ২ sorts as 2.
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if ( ord( $sortLetter ) >= 48 && ord( $sortLetter ) <= 57 ) {
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$sortLetter = wfMessage( 'category-header-numerals' )->numParams( 0, 9 )->text();
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}
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}
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return $sortLetter;
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}
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/**
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* @since 1.16.3
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* @return array
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*/
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public function getFirstLetterData() {
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if ( $this->firstLetterData === null ) {
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$cache = ObjectCache::getLocalServerInstance( CACHE_ANYTHING );
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$cacheKey = $cache->makeKey(
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'first-letters',
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static::class,
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$this->locale,
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$this->digitTransformLanguage->getCode(),
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self::getICUVersion(),
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self::FIRST_LETTER_VERSION
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);
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$this->firstLetterData = $cache->getWithSetCallback( $cacheKey, $cache::TTL_WEEK, function () {
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return $this->fetchFirstLetterData();
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} );
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}
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return $this->firstLetterData;
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}
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/**
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* @return array
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* @throws MWException
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*/
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private function fetchFirstLetterData() {
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// Generate data from serialized data file
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if ( isset( self::$tailoringFirstLetters[$this->locale] ) ) {
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$letters = wfGetPrecompiledData( 'first-letters-root.ser' );
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// Append additional characters
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$letters = array_merge( $letters, self::$tailoringFirstLetters[$this->locale] );
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// Remove unnecessary ones, if any
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if ( isset( self::$tailoringFirstLetters['-' . $this->locale] ) ) {
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$letters = array_diff( $letters, self::$tailoringFirstLetters['-' . $this->locale] );
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}
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// Apply digit transforms
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$digits = [ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' ];
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$letters = array_diff( $letters, $digits );
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foreach ( $digits as $digit ) {
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$letters[] = $this->digitTransformLanguage->formatNum( $digit, true );
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}
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} else {
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$letters = wfGetPrecompiledData( "first-letters-{$this->locale}.ser" );
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if ( $letters === false ) {
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throw new MWException( "MediaWiki does not support ICU locale " .
|
||
"\"{$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 = [];
|
||
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 = [];
|
||
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.\n" );
|
||
unset( $letterMap[$badKey] );
|
||
// This code assumes that unsetting does not change sort order.
|
||
}
|
||
$data = [
|
||
'chars' => array_values( $letterMap ),
|
||
'keys' => array_keys( $letterMap ),
|
||
];
|
||
|
||
// Reduce memory usage before caching
|
||
unset( $letterMap );
|
||
|
||
return $data;
|
||
}
|
||
|
||
/**
|
||
* @since 1.16.3
|
||
*/
|
||
public function getLetterByIndex( $index ) {
|
||
return $this->getFirstLetterData()['chars'][$index];
|
||
}
|
||
|
||
/**
|
||
* @since 1.16.3
|
||
*/
|
||
public function getSortKeyByLetterIndex( $index ) {
|
||
return $this->getFirstLetterData()['keys'][$index];
|
||
}
|
||
|
||
/**
|
||
* @since 1.16.3
|
||
*/
|
||
public function getFirstLetterCount() {
|
||
return count( $this->getFirstLetterData()['chars'] );
|
||
}
|
||
|
||
/**
|
||
* Test if a code point is a CJK (Chinese, Japanese, Korean) character
|
||
* @since 1.16.3
|
||
*/
|
||
public 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 54561
|
||
* https://bugs.php.net/bug.php?id=54561). This function will return
|
||
* false on older PHPs.
|
||
*
|
||
* TODO: Remove the backwards-compatibility as MediaWiki now requires
|
||
* higher levels of PHP.
|
||
*
|
||
* @since 1.21
|
||
* @return string|bool
|
||
*/
|
||
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|bool
|
||
*/
|
||
static function getUnicodeVersionForICU() {
|
||
$icuVersion = IcuCollation::getICUVersion();
|
||
if ( !$icuVersion ) {
|
||
return false;
|
||
}
|
||
|
||
$versionPrefix = substr( $icuVersion, 0, 3 );
|
||
// Source: http://site.icu-project.org/download
|
||
$map = [
|
||
'57.' => '8.0',
|
||
'56.' => '8.0',
|
||
'55.' => '7.0',
|
||
'54.' => '7.0',
|
||
'53.' => '6.3',
|
||
'52.' => '6.3',
|
||
'51.' => '6.2',
|
||
'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;
|
||
}
|
||
}
|
||
}
|