3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
16 * http://www.gnu.org/copyleft/gpl.html
22 * Workaround for incorrect collation of Estonian language ('et') in ICU (bug 54168).
24 * 'W' and 'V' should not be considered the same letter for the purposes of collation in modern
25 * Estonian. We work around this by replacing 'W' and 'w' with 'ᴡ' U+1D21 'LATIN LETTER SMALL
26 * CAPITAL W' for sortkey generation, which is collated like 'W' and is not tailored to have the
27 * same primary weight as 'V' in Estonian.
29 class CollationEt
extends IcuCollation
{
30 function __construct() {
31 parent
::__construct( 'et' );
34 private static function mangle( $string ) {
37 'ᴡ', // U+1D21 'LATIN LETTER SMALL CAPITAL W'
42 private static function unmangle( $string ) {
43 // Casing data is lost…
45 'ᴡ', // U+1D21 'LATIN LETTER SMALL CAPITAL W'
51 function getSortKey( $string ) {
52 return parent
::getSortKey( self
::mangle( $string ) );
55 function getFirstLetter( $string ) {
56 return self
::unmangle( parent
::getFirstLetter( self
::mangle( $string ) ) );