File: /home/eblama1/sms.karnplayinland.com/classes/MoTranslator/Translator.php
<?php
/*
Copyright (c) 2003, 2009 Danilo Segan <danilo@kvota.net>.
Copyright (c) 2005 Nico Kaiser <nico@siriux.net>
Copyright (c) 2016 Michal Čihař <michal@cihar.com>
This file is part of MoTranslator.
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.
*/
namespace PhpMyAdmin\MoTranslator;
/**
* Use php-gettext original sanitize_plural_expression() & select_string() functions
* using eval to avoid loading ExpressionLanguage.
*
* @link https://bazaar.launchpad.net/~danilo/php-gettext/trunk/view/head:/gettext.php
*/
// use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
/**
* Provides a simple gettext replacement that works independently from
* the system's gettext abilities.
* It can read MO files and use them for translating strings.
*
* It caches ll strings and translations to speed up the string lookup.
*/
class Translator
{
/**
* None error.
*/
const ERROR_NONE = 0;
/**
* File does not exist.
*/
const ERROR_DOES_NOT_EXIST = 1;
/**
* File has bad magic number.
*/
const ERROR_BAD_MAGIC = 2;
/**
* Error while reading file, probably too short.
*/
const ERROR_READING = 3;
/**
* Big endian mo file magic bytes.
*/
const MAGIC_BE = "\x95\x04\x12\xde";
/**
* Little endian mo file magic bytes.
*/
const MAGIC_LE = "\xde\x12\x04\x95";
/**
* Parse error code (0 if no error).
*
* @var int
*/
public $error = self::ERROR_NONE;
/**
* Cache header field for plural forms.
*
* @var string|null
*/
private $pluralequation = null;
/**
* @var ExpressionLanguage|null Evaluator for plurals
*/
private $pluralexpression = null;
/**
* @var int|null number of plurals
*/
private $pluralcount = null;
/**
* Array with original -> translation mapping.
*
* @var array
*/
private $cache_translations = array();
/**
* Constructor.
*
* @param string $filename Name of mo file to load
*/
public function __construct($filename)
{
if (!is_readable($filename)) {
$this->error = self::ERROR_DOES_NOT_EXIST;
return;
}
$stream = new StringReader($filename);
try {
$magic = $stream->read(0, 4);
if (strcmp($magic, self::MAGIC_LE) == 0) {
$unpack = 'V';
} elseif (strcmp($magic, self::MAGIC_BE) == 0) {
$unpack = 'N';
} else {
$this->error = self::ERROR_BAD_MAGIC;
return;
}
/* Parse header */
$total = $stream->readint($unpack, 8);
$originals = $stream->readint($unpack, 12);
$translations = $stream->readint($unpack, 16);
/* get original and translations tables */
$table_originals = $stream->readintarray($unpack, $originals, $total * 2);
$table_translations = $stream->readintarray($unpack, $translations, $total * 2);
/* read all strings to the cache */
for ($i = 0; $i < $total; ++$i) {
$original = $stream->read($table_originals[$i * 2 + 2], $table_originals[$i * 2 + 1]);
$translation = $stream->read($table_translations[$i * 2 + 2], $table_translations[$i * 2 + 1]);
$this->cache_translations[$original] = $translation;
}
} catch (ReaderException $e) {
$this->error = self::ERROR_READING;
return;
}
}
/**
* Translates a string.
* Fix try searching plural forms adding an 's' to singular form and with number set to 1.
*
* @param string $msgid String to be translated
*
* @return string translated string (or original, if not found)
*/
public function gettext($msgid)
{
if (array_key_exists($msgid, $this->cache_translations)) {
return $this->cache_translations[$msgid];
}
// Fix try searching plural forms adding an 's' to singular form and with number set to 1.
return $this->ngettext($msgid, $msgid . 's', 1);
// return $msgid;
}
/**
* Check if a string is translated.
*
* @param string $msgid String to be checked
*
* @return bool
*/
public function exists($msgid)
{
return array_key_exists($msgid, $this->cache_translations);
}
/**
* Sanitize plural form expression for use in PHP eval call.
*
* @link https://bazaar.launchpad.net/~danilo/php-gettext/trunk/view/head:/gettext.php
*
* @access public
* @return string sanitized plural form expression
*/
public static function sanitizePluralExpression($expr)
{
// Get rid of disallowed characters.
$expr = preg_replace('@[^a-zA-Z0-9_:;\(\)\?\|\&=!<>+*/\%-]@', '', $expr);
// Add parenthesis for tertiary '?' operator.
$expr .= ';';
$res = '';
$p = 0;
for ($i = 0; $i < strlen($expr); $i++) {
$ch = $expr[$i];
switch ($ch) {
case '?':
$res .= ' ? (';
$p++;
break;
case ':':
$res .= ') : (';
break;
case ';':
$res .= str_repeat( ')', $p) . ';';
$p = 0;
break;
default:
$res .= $ch;
}
}
return $res;
}
/**
* Sanitize plural form expression for use in ExpressionLanguage.
*
* @param string $expr Expression to sanitize
*
* @return string sanitized plural form expression
*/
/*public static function sanitizePluralExpression($expr)
{
// Parse equation
$expr = explode(';', $expr);
if (count($expr) >= 2) {
$expr = $expr[1];
} else {
$expr = $expr[0];
}
$expr = trim(strtolower($expr));
// Strip plural prefix
if (substr($expr, 0, 6) === 'plural') {
$expr = ltrim(substr($expr, 6));
}
// Strip equals
if (substr($expr, 0, 1) === '=') {
$expr = ltrim(substr($expr, 1));
}
// Cleanup from unwanted chars
$expr = preg_replace('@[^n0-9:\(\)\?=!<>/%&| ]@', '', $expr);
return $expr;
}*/
/**
* Extracts number of plurals from plurals form expression.
*
* @param string $expr Expression to process
*
* @return int Total number of plurals
*/
public static function extractPluralCount($expr)
{
$parts = explode(';', $expr, 2);
$nplurals = explode('=', trim($parts[0]), 2);
if (strtolower(rtrim($nplurals[0])) != 'nplurals') {
return 1;
}
if (count($nplurals) == 1) {
return 1;
}
return intval($nplurals[1]);
}
/**
* Parse full PO header and extract only plural forms line.
*
* @param string $header Gettext header
*
* @return string verbatim plural form header field
*/
public static function extractPluralsForms($header)
{
$headers = explode("\n", $header);
$expr = 'nplurals=2; plural=n == 1 ? 0 : 1;';
foreach ($headers as $header) {
if (stripos($header, 'Plural-Forms:') === 0) {
$expr = substr($header, 13);
}
}
return $expr;
}
/**
* Get possible plural forms from MO header.
*
* @return string plural form header
*/
private function getPluralForms()
{
// lets assume message number 0 is header
// this is true, right?
// cache header field for plural forms
if (is_null($this->pluralequation)) {
if (isset($this->cache_translations[''])) {
$header = $this->cache_translations[''];
} else {
$header = '';
}
$expr = $this->extractPluralsForms($header);
$this->pluralequation = $this->sanitizePluralExpression($expr);
$this->pluralcount = $this->extractPluralCount($expr);
}
return $this->pluralequation;
}
/**
* Detects which plural form to take
*
* @link https://bazaar.launchpad.net/~danilo/php-gettext/trunk/view/head:/gettext.php
* @uses eval
*
* @access private
* @param int n count
* @return int array index of the right plural form
*/
private function selectString($n)
{
if (!is_int($n)) {
throw new \InvalidArgumentException(
"Select_string only accepts integers: " . $n);
}
$string = $this->getPluralForms();
$string = str_replace('nplurals',"\$total",$string);
$string = str_replace("n",$n,$string);
$string = str_replace('plural',"\$plural",$string);
$total = 0;
$plural = 0;
eval("$string");
if ($plural >= $total) {
$plural = $total - 1;
}
return $plural;
}
/**
* Detects which plural form to take.
*
* @param int $n count of objects
*
* @return int array index of the right plural form
*/
/*private function selectString($n)
{
if (is_null($this->pluralexpression)) {
$this->pluralexpression = new ExpressionLanguage();
}
try {
$plural = $this->pluralexpression->evaluate(
$this->getPluralForms(), array('n' => $n)
);
} catch (\Exception $e) {
$plural = 0;
}
if ($plural >= $this->pluralcount) {
$plural = $this->pluralcount - 1;
}
return $plural;
}*/
/**
* Plural version of gettext.
*
* @param string $msgid Single form
* @param string $msgidPlural Plural form
* @param int $number Number of objects
*
* @return string translated plural form
*/
public function ngettext($msgid, $msgidPlural, $number)
{
// this should contains all strings separated by NULLs
$key = implode(chr(0), array($msgid, $msgidPlural));
if (!array_key_exists($key, $this->cache_translations)) {
return ($number != 1) ? $msgidPlural : $msgid;
}
// find out the appropriate form
$select = $this->selectString( (int) $number); // FJ fix error must be integer.
$result = $this->cache_translations[$key];
$list = explode(chr(0), $result);
if (!isset($list[$select])) {
return $list[0];
}
return $list[$select];
}
/**
* Translate with context.
*
* @param string $msgctxt Context
* @param string $msgid String to be translated
*
* @return string translated plural form
*/
public function pgettext($msgctxt, $msgid)
{
$key = implode(chr(4), array($msgctxt, $msgid));
$ret = $this->gettext($key);
if (strpos($ret, chr(4)) !== false) {
return $msgid;
}
return $ret;
}
/**
* Plural version of pgettext.
*
* @param string $msgctxt Context
* @param string $msgid Single form
* @param string $msgidPlural Plural form
* @param int $number Number of objects
*
* @return string translated plural form
*/
public function npgettext($msgctxt, $msgid, $msgidPlural, $number)
{
$key = implode(chr(4), array($msgctxt, $msgid));
$ret = $this->ngettext($key, $msgidPlural, $number);
if (strpos($ret, chr(4)) !== false) {
return $msgid;
}
return $ret;
}
/**
* Set translation in place
*
* @param string $msgid String to be set
* @param string $msgstr Translation
*
* @return void
*/
public function setTranslation($msgid, $msgstr)
{
$this->cache_translations[$msgid] = $msgstr;
}
}