includes/collation/IdentityCollation.php
<?php
/**
* 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
*/
/**
* Collation class that's essentially a no-op.
*
* Does sorting based on binary value of the string.
* Like how things were pre 1.17.
*
* @since 1.18
*/
class IdentityCollation extends Collation {
/** @var Language */
private $contentLanguage;
/**
* @param Language $contentLanguage
*/
public function __construct( Language $contentLanguage ) {
$this->contentLanguage = $contentLanguage;
}
public function getSortKey( $string ) {
return $string;
}
public function getFirstLetter( $string ) {
// Copied from UppercaseCollation.
// I'm kind of unclear on when this could happen...
if ( $string[0] == "\0" ) {
$string = substr( $string, 1 );
}
return $this->contentLanguage->firstChar( $string );
}
}