includes/collation/IdentityCollation.php

   1 <?php
   2 /**
   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.
   7  *
   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.
  12  *
  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
  17  *
  18  * @file
  19  */
  20
  21 /**
  22  * Collation class that's essentially a no-op.
  23  *
  24  * Does sorting based on binary value of the string.
  25  * Like how things were pre 1.17.
  26  *
  27  * @since 1.18
  28  */
  29 class IdentityCollation extends Collation {
  30
  31         public function getSortKey( $string ) {
  32                 return $string;
  33         }
  34
  35         public function getFirstLetter( $string ) {
  36                 global $wgContLang;
  37                 // Copied from UppercaseCollation.
  38                 // I'm kind of unclear on when this could happen...
  39                 if ( $string[0] == "\0" ) {
  40                         $string = substr( $string, 1 );
  41                 }
  42                 return $wgContLang->firstChar( $string );
  43         }
  44 }