325 lines
8.2 KiB
PHP
325 lines
8.2 KiB
PHP
<?php
|
|
/**
|
|
* Class for a set of entries for translation and their associated headers
|
|
*
|
|
* @version $Id: translations.php 718 2012-10-31 00:32:02Z nbachiyski $
|
|
* @package pomo
|
|
* @subpackage translations
|
|
*/
|
|
|
|
require_once dirname(__FILE__) . '/entry.php';
|
|
|
|
if ( !class_exists( 'Translations' ) ):
|
|
class Translations {
|
|
var $entries = array();
|
|
var $headers = array();
|
|
|
|
/**
|
|
* Add entry to the PO structure
|
|
*
|
|
* @param array|Translation_Entry &$entry
|
|
* @return bool true on success, false if the entry doesn't have a key
|
|
*/
|
|
function add_entry($entry) {
|
|
if (is_array($entry)) {
|
|
$entry = new Translation_Entry($entry);
|
|
}
|
|
$key = $entry->key();
|
|
if (false === $key) return false;
|
|
$this->entries[$key] = &$entry;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param array|Translation_Entry $entry
|
|
* @return bool
|
|
*/
|
|
function add_entry_or_merge($entry) {
|
|
if (is_array($entry)) {
|
|
$entry = new Translation_Entry($entry);
|
|
}
|
|
$key = $entry->key();
|
|
if (false === $key) return false;
|
|
if (isset($this->entries[$key]))
|
|
$this->entries[$key]->merge_with($entry);
|
|
else
|
|
$this->entries[$key] = &$entry;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Sets $header PO header to $value
|
|
*
|
|
* If the header already exists, it will be overwritten
|
|
*
|
|
* TODO: this should be out of this class, it is gettext specific
|
|
*
|
|
* @param string $header header name, without trailing :
|
|
* @param string $value header value, without trailing \n
|
|
*/
|
|
function set_header($header, $value) {
|
|
$this->headers[$header] = $value;
|
|
}
|
|
|
|
/**
|
|
* @param array $headers
|
|
*/
|
|
function set_headers($headers) {
|
|
foreach($headers as $header => $value) {
|
|
$this->set_header($header, $value);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string $header
|
|
*/
|
|
function get_header($header) {
|
|
return isset($this->headers[$header])? $this->headers[$header] : false;
|
|
}
|
|
|
|
/**
|
|
* @param Translation_Entry $entry
|
|
*/
|
|
function translate_entry(&$entry) {
|
|
$key = $entry->key();
|
|
return isset($this->entries[$key])? $this->entries[$key] : false;
|
|
}
|
|
|
|
/**
|
|
* @param string $singular
|
|
* @param string $context
|
|
* @return string
|
|
*/
|
|
function translate($singular, $context=null) {
|
|
$entry = new Translation_Entry(array('singular' => $singular, 'context' => $context));
|
|
$translated = $this->translate_entry($entry);
|
|
return ($translated && !empty($translated->translations))? $translated->translations[0] : $singular;
|
|
}
|
|
|
|
/**
|
|
* Given the number of items, returns the 0-based index of the plural form to use
|
|
*
|
|
* Here, in the base Translations class, the common logic for English is implemented:
|
|
* 0 if there is one element, 1 otherwise
|
|
*
|
|
* This function should be overrided by the sub-classes. For example MO/PO can derive the logic
|
|
* from their headers.
|
|
*
|
|
* @param integer $count number of items
|
|
*/
|
|
function select_plural_form($count) {
|
|
return 1 == $count? 0 : 1;
|
|
}
|
|
|
|
function get_plural_forms_count() {
|
|
return 2;
|
|
}
|
|
|
|
/**
|
|
* @param string $singular
|
|
* @param string $plural
|
|
* @param int $count
|
|
* @param string $context
|
|
*/
|
|
function translate_plural($singular, $plural, $count, $context = null) {
|
|
$entry = new Translation_Entry(array('singular' => $singular, 'plural' => $plural, 'context' => $context));
|
|
$translated = $this->translate_entry($entry);
|
|
$index = $this->select_plural_form($count);
|
|
$total_plural_forms = $this->get_plural_forms_count();
|
|
if ($translated && 0 <= $index && $index < $total_plural_forms &&
|
|
is_array($translated->translations) &&
|
|
isset($translated->translations[$index]))
|
|
return $translated->translations[$index];
|
|
else
|
|
return 1 == $count? $singular : $plural;
|
|
}
|
|
|
|
/**
|
|
* Merge $other in the current object.
|
|
*
|
|
* @param Object &$other Another Translation object, whose translations will be merged in this one
|
|
* @return void
|
|
**/
|
|
function merge_with(&$other) {
|
|
foreach( $other->entries as $entry ) {
|
|
$this->entries[$entry->key()] = $entry;
|
|
}
|
|
}
|
|
|
|
function merge_originals_with(&$other) {
|
|
foreach( $other->entries as $entry ) {
|
|
if ( !isset( $this->entries[$entry->key()] ) )
|
|
$this->entries[$entry->key()] = $entry;
|
|
else
|
|
$this->entries[$entry->key()]->merge_with($entry);
|
|
}
|
|
}
|
|
}
|
|
|
|
class Gettext_Translations extends Translations {
|
|
/**
|
|
* The gettext implementation of select_plural_form.
|
|
*
|
|
* It lives in this class, because there are more than one descendand, which will use it and
|
|
* they can't share it effectively.
|
|
*
|
|
* @param int $count
|
|
*/
|
|
function gettext_select_plural_form($count) {
|
|
if (!isset($this->_gettext_select_plural_form) || is_null($this->_gettext_select_plural_form)) {
|
|
list( $nplurals, $expression ) = $this->nplurals_and_expression_from_header($this->get_header('Plural-Forms'));
|
|
$this->_nplurals = $nplurals;
|
|
$this->_gettext_select_plural_form = $this->make_plural_form_function($nplurals, $expression);
|
|
}
|
|
return call_user_func($this->_gettext_select_plural_form, $count);
|
|
}
|
|
|
|
/**
|
|
* @param string $header
|
|
* @return array
|
|
*/
|
|
function nplurals_and_expression_from_header($header) {
|
|
if (preg_match('/^\s*nplurals\s*=\s*(\d+)\s*;\s+plural\s*=\s*(.+)$/', $header, $matches)) {
|
|
$nplurals = (int)$matches[1];
|
|
$expression = trim($this->parenthesize_plural_exression($matches[2]));
|
|
return array($nplurals, $expression);
|
|
} else {
|
|
return array(2, 'n != 1');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Makes a function, which will return the right translation index, according to the
|
|
* plural forms header
|
|
* @param int $nplurals
|
|
* @param string $expression
|
|
*/
|
|
function make_plural_form_function($nplurals, $expression) {
|
|
$expression = str_replace('n', '$n', $expression);
|
|
$func_body = "
|
|
\$index = (int)($expression);
|
|
return (\$index < $nplurals)? \$index : $nplurals - 1;";
|
|
return create_function('$n', $func_body);
|
|
}
|
|
|
|
/**
|
|
* Adds parentheses to the inner parts of ternary operators in
|
|
* plural expressions, because PHP evaluates ternary oerators from left to right
|
|
*
|
|
* @param string $expression the expression without parentheses
|
|
* @return string the expression with parentheses added
|
|
*/
|
|
function parenthesize_plural_exression($expression) {
|
|
$expression .= ';';
|
|
$res = '';
|
|
$depth = 0;
|
|
for ($i = 0; $i < strlen($expression); ++$i) {
|
|
$char = $expression[$i];
|
|
switch ($char) {
|
|
case '?':
|
|
$res .= ' ? (';
|
|
$depth++;
|
|
break;
|
|
case ':':
|
|
$res .= ') : (';
|
|
break;
|
|
case ';':
|
|
$res .= str_repeat(')', $depth) . ';';
|
|
$depth= 0;
|
|
break;
|
|
default:
|
|
$res .= $char;
|
|
}
|
|
}
|
|
return rtrim($res, ';');
|
|
}
|
|
|
|
/**
|
|
* @param string $translation
|
|
* @return array
|
|
*/
|
|
function make_headers($translation) {
|
|
$headers = array();
|
|
// sometimes \ns are used instead of real new lines
|
|
$translation = str_replace('\n', "\n", $translation);
|
|
$lines = explode("\n", $translation);
|
|
foreach($lines as $line) {
|
|
$parts = explode(':', $line, 2);
|
|
if (!isset($parts[1])) continue;
|
|
$headers[trim($parts[0])] = trim($parts[1]);
|
|
}
|
|
return $headers;
|
|
}
|
|
|
|
/**
|
|
* @param string $header
|
|
* @param string $value
|
|
*/
|
|
function set_header($header, $value) {
|
|
parent::set_header($header, $value);
|
|
if ('Plural-Forms' == $header) {
|
|
list( $nplurals, $expression ) = $this->nplurals_and_expression_from_header($this->get_header('Plural-Forms'));
|
|
$this->_nplurals = $nplurals;
|
|
$this->_gettext_select_plural_form = $this->make_plural_form_function($nplurals, $expression);
|
|
}
|
|
}
|
|
}
|
|
endif;
|
|
|
|
if ( !class_exists( 'NOOP_Translations' ) ):
|
|
/**
|
|
* Provides the same interface as Translations, but doesn't do anything
|
|
*/
|
|
class NOOP_Translations {
|
|
var $entries = array();
|
|
var $headers = array();
|
|
|
|
function add_entry($entry) {
|
|
return true;
|
|
}
|
|
|
|
function set_header($header, $value) {
|
|
}
|
|
|
|
function set_headers($headers) {
|
|
}
|
|
|
|
function get_header($header) {
|
|
return false;
|
|
}
|
|
|
|
function translate_entry(&$entry) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param string $singular
|
|
* @param string $context
|
|
*/
|
|
function translate($singular, $context=null) {
|
|
return $singular;
|
|
}
|
|
|
|
function select_plural_form($count) {
|
|
return 1 == $count? 0 : 1;
|
|
}
|
|
|
|
function get_plural_forms_count() {
|
|
return 2;
|
|
}
|
|
|
|
/**
|
|
* @param string $singular
|
|
* @param string $plural
|
|
* @param int $count
|
|
* @param string $context
|
|
*/
|
|
function translate_plural($singular, $plural, $count, $context = null) {
|
|
return 1 == $count? $singular : $plural;
|
|
}
|
|
|
|
function merge_with(&$other) {
|
|
}
|
|
}
|
|
endif;
|