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<?php
namespace Gettext\Generators;
use Gettext\Translations;
use Gettext\Utils\HeadersGeneratorTrait;
class Mo extends Generator implements GeneratorInterface
{
use HeadersGeneratorTrait;
public static $options = [
'includeHeaders' => true,
];
/**
* {@parentDoc}.
*/
public static function toString(Translations $translations, array $options = [])
{
$options += static::$options;
$messages = [];
if ($options['includeHeaders']) {
$messages[''] = self::generateHeaders($translations);
}
foreach ($translations as $translation) {
if (!$translation->hasTranslation()) {
continue;
}
if ($translation->hasContext()) {
$originalString = $translation->getContext()."\x04".$translation->getOriginal();
} else {
$originalString = $translation->getOriginal();
}
$messages[$originalString] = $translation;
}
ksort($messages);
$numEntries = count($messages);
$originalsTable = '';
$translationsTable = '';
$originalsIndex = [];
$translationsIndex = [];
$pluralForm = $translations->getPluralForms();
$pluralSize = is_array($pluralForm) ? ($pluralForm[0] - 1) : null;
foreach ($messages as $originalString => $translation) {
if (is_string($translation)) {
// Headers
$translationString = $translation;
} else {
/* @var $translation \Gettext\Translation */
if ($translation->hasPlural() && $translation->hasPluralTranslations(true)) {
$originalString .= "\x00".$translation->getPlural();
$translationString = $translation->getTranslation();
$translationString .= "\x00".implode("\x00", $translation->getPluralTranslations($pluralSize));
} else {
$translationString = $translation->getTranslation();
}
}
$originalsIndex[] = [
'relativeOffset' => strlen($originalsTable),
'length' => strlen($originalString)
];
$originalsTable .= $originalString."\x00";
$translationsIndex[] = [
'relativeOffset' => strlen($translationsTable),
'length' => strlen($translationString)
];
$translationsTable .= $translationString."\x00";
}
// Offset of table with the original strings index: right after the header (which is 7 words)
$originalsIndexOffset = 7 * 4;
// Size of table with the original strings index
$originalsIndexSize = $numEntries * (4 + 4);
// Offset of table with the translation strings index: right after the original strings index table
$translationsIndexOffset = $originalsIndexOffset + $originalsIndexSize;
// Size of table with the translation strings index
$translationsIndexSize = $numEntries * (4 + 4);
// Hashing table starts after the header and after the index table
$originalsStringsOffset = $translationsIndexOffset + $translationsIndexSize;
// Translations start after the keys
$translationsStringsOffset = $originalsStringsOffset + strlen($originalsTable);
// Let's generate the .mo file binary data
$mo = '';
// Magic number
$mo .= pack('L', 0x950412de);
// File format revision
$mo .= pack('L', 0);
// Number of strings
$mo .= pack('L', $numEntries);
// Offset of table with original strings
$mo .= pack('L', $originalsIndexOffset);
// Offset of table with translation strings
$mo .= pack('L', $translationsIndexOffset);
// Size of hashing table: we don't use it.
$mo .= pack('L', 0);
// Offset of hashing table: it would start right after the translations index table
$mo .= pack('L', $translationsIndexOffset + $translationsIndexSize);
// Write the lengths & offsets of the original strings
foreach ($originalsIndex as $info) {
$mo .= pack('L', $info['length']);
$mo .= pack('L', $originalsStringsOffset + $info['relativeOffset']);
}
// Write the lengths & offsets of the translated strings
foreach ($translationsIndex as $info) {
$mo .= pack('L', $info['length']);
$mo .= pack('L', $translationsStringsOffset + $info['relativeOffset']);
}
// Write original strings
$mo .= $originalsTable;
// Write translation strings
$mo .= $translationsTable;
return $mo;
}
}
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