MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / includes / collation / IdentityCollation.php

diff --git a/includes/collation/IdentityCollation.php b/includes/collation/IdentityCollation.php
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+<?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 {
+
+       public function getSortKey( $string ) {
+               return $string;
+       }
+
+       public 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 );
+       }
+}