includes/languages/LanguageJa.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  * Japanese (日本語)
  23  *
  24  * @ingroup Languages
  25  */
  26 class LanguageJa extends Language {
  27
  28         /** Space string for hiragana - unicode range U3040-309f */
  29         private const WORD_SEG_HIRAGANA = '(?:\xe3(?:\x81[\x80-\xbf]|\x82[\x80-\x9f]))';
  30
  31         /** Space string for katakana - unicode range U30a0-30ff */
  32         private const WORD_SEG_KATAKANA = '(?:\xe3(?:\x82[\xa0-\xbf]|\x83[\x80-\xbf]))';
  33
  34         /** Space string for kanji - unicode range U3200-9999 = \xe3\x88\x80-\xe9\xa6\x99 */
  35         private const WORD_SEG_KANJI =
  36                 '(?:\xe3[\x88-\xbf][\x80-\xbf]|[\xe4-\xe8][\x80-\xbf]{2}|\xe9[\x80-\xa5][\x80-\xbf]|\xe9\xa6[\x80-\x99])';
  37
  38         private const WORD_SEGMENTATION_REGEX =
  39                 '/(' . self::WORD_SEG_HIRAGANA . '+|' . self::WORD_SEG_KATAKANA . '+|' . self::WORD_SEG_KANJI . '+)/';
  40
  41         public function segmentByWord( $string ) {
  42                 return self::insertSpace( $string, self::WORD_SEGMENTATION_REGEX );
  43         }
  44
  45         /**
  46          * Italic is not appropriate for Japanese script.
  47          * Unfortunately, most browsers do not recognise this, and render `<em>` as italic.
  48          *
  49          * @param string $text
  50          * @return string
  51          */
  52         public function emphasize( $text ) {
  53                 return $text;
  54         }
  55 }