<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Translation;
use Symfony\Contracts\Translation\TranslatorInterface;
/**
* This translator should only be used in a development environment.
*/
final class PseudoLocalizationTranslator implements TranslatorInterface
{
private const EXPANSION_CHARACTER = '~';
private $translator;
private $accents;
private $expansionFactor;
private $brackets;
private $parseHTML;
private $localizableHTMLAttributes;
/**
* Available options:
* * accents:
* type: boolean
* default: true
* description: replace ASCII characters of the translated string with accented versions or similar characters
* example: if true, "foo" => "ƒöö".
*
* * expansion_factor:
* type: float
* default: 1
* validation: it must be greater than or equal to 1
* description: expand the translated string by the given factor with spaces and tildes
* example: if 2, "foo" => "~foo ~"
*
* * brackets:
* type: boolean
* default: true
* description: wrap the translated string with brackets
* example: if true, "foo" => "[foo]"
*
* * parse_html:
* type: boolean
* default: false
* description: parse the translated string as HTML - looking for HTML tags has a performance impact but allows to preserve them from alterations - it also allows to compute the visible translated string length which is useful to correctly expand ot when it contains HTML
* warning: unclosed tags are unsupported, they will be fixed (closed) by the parser - eg, "foo <div>bar" => "foo <div>bar</div>"
*
* * localizable_html_attributes:
* type: string[]
* default: []
* description: the list of HTML attributes whose values can be altered - it is only useful when the "parse_html" option is set to true
* example: if ["title"], and with the "accents" option set to true, "<a href="#" title="Go to your profile">Profile</a>" => "<a href="#" title="Ĝö ţö ýöûŕ þŕöƒîļé">Þŕöƒîļé</a>" - if "title" was not in the "localizable_html_attributes" list, the title attribute data would be left unchanged.
*/
public function __construct(TranslatorInterface $translator, array $options = [])
{
$this->translator = $translator;
$this->accents = $options['accents'] ?? true;
if (1.0 > ($this->expansionFactor = $options['expansion_factor'] ?? 1.0)) {
throw new \InvalidArgumentException('The expansion factor must be greater than or equal to 1.');
}
$this->brackets = $options['brackets'] ?? true;
$this->parseHTML = $options['parse_html'] ?? false;
if ($this->parseHTML && !$this->accents && 1.0 === $this->expansionFactor) {
$this->parseHTML = false;
}
$this->localizableHTMLAttributes = $options['localizable_html_attributes'] ?? [];
}
/**
* {@inheritdoc}
*/
public function trans(string $id, array $parameters = [], string $domain = null, string $locale = null)
{
$trans = '';
$visibleText = '';
foreach ($this->getParts($this->translator->trans($id, $parameters, $domain, $locale)) as [$visible, $localizable, $text]) {
if ($visible) {
$visibleText .= $text;
}
if (!$localizable) {
$trans .= $text;
continue;
}
$this->addAccents($trans, $text);
}
$this->expand($trans, $visibleText);
$this->addBrackets($trans);
return $trans;
}
private function getParts(string $originalTrans): array
{
if (!$this->parseHTML) {
return [[true, true, $originalTrans]];
}
$html = mb_convert_encoding($originalTrans, 'HTML-ENTITIES', mb_detect_encoding($originalTrans, null, true) ?: 'UTF-8');
$useInternalErrors = libxml_use_internal_errors(true);
$dom = new \DOMDocument();
$dom->loadHTML('<trans>'.$html.'</trans>');
libxml_clear_errors();
libxml_use_internal_errors($useInternalErrors);
return $this->parseNode($dom->childNodes->item(1)->childNodes->item(0)->childNodes->item(0));
}
private function parseNode(\DOMNode $node): array
{
$parts = [];
foreach ($node->childNodes as $childNode) {
if (!$childNode instanceof \DOMElement) {
$parts[] = [true, true, $childNode->nodeValue];
continue;
}
$parts[] = [false, false, '<'.$childNode->tagName];
/** @var \DOMAttr $attribute */
foreach ($childNode->attributes as $attribute) {
$parts[] = [false, false, ' '.$attribute->nodeName.'="'];
$localizableAttribute = \in_array($attribute->nodeName, $this->localizableHTMLAttributes, true);
foreach (preg_split('/(&(?:amp|quot|#039|lt|gt);+)/', htmlspecialchars($attribute->nodeValue, \ENT_QUOTES, 'UTF-8'), -1, \PREG_SPLIT_DELIM_CAPTURE) as $i => $match) {
if ('' === $match) {
continue;
}
$parts[] = [false, $localizableAttribute && 0 === $i % 2, $match];
}
$parts[] = [false, false, '"'];
}
$parts[] = [false, false, '>'];
$parts = array_merge($parts, $this->parseNode($childNode, $parts));
$parts[] = [false, false, '</'.$childNode->tagName.'>'];
}
return $parts;
}
private function addAccents(string &$trans, string $text): void
{
$trans .= $this->accents ? strtr($text, [
' ' => ' ',
'!' => '¡',
'"' => '″',
'#' => '♯',
'$' => '€',
'%' => '‰',
'&' => '⅋',
'\'' => '´',
'(' => '{',
')' => '}',
'*' => '⁎',
'+' => '⁺',
',' => '،',
'-' => '‐',
'.' => '·',
'/' => '⁄',
'0' => '⓪',
'1' => '①',
'2' => '②',
'3' => '③',
'4' => '④',
'5' => '⑤',
'6' => '⑥',
'7' => '⑦',
'8' => '⑧',
'9' => '⑨',
':' => '∶',
';' => '⁏',
'<' => '≤',
'=' => '≂',
'>' => '≥',
'?' => '¿',
'@' => '՞',
'A' => 'Å',
'B' => 'Ɓ',
'C' => 'Ç',
'D' => 'Ð',
'E' => 'É',
'F' => 'Ƒ',
'G' => 'Ĝ',
'H' => 'Ĥ',
'I' => 'Î',
'J' => 'Ĵ',
'K' => 'Ķ',
'L' => 'Ļ',
'M' => 'Ṁ',
'N' => 'Ñ',
'O' => 'Ö',
'P' => 'Þ',
'Q' => 'Ǫ',
'R' => 'Ŕ',
'S' => 'Š',
'T' => 'Ţ',
'U' => 'Û',
'V' => 'Ṽ',
'W' => 'Ŵ',
'X' => 'Ẋ',
'Y' => 'Ý',
'Z' => 'Ž',
'[' => '⁅',
'\\' => '∖',
']' => '⁆',
'^' => '˄',
'_' => '‿',
'`' => '‵',
'a' => 'å',
'b' => 'ƀ',
'c' => 'ç',
'd' => 'ð',
'e' => 'é',
'f' => 'ƒ',
'g' => 'ĝ',
'h' => 'ĥ',
'i' => 'î',
'j' => 'ĵ',
'k' => 'ķ',
'l' => 'ļ',
'm' => 'ɱ',
'n' => 'ñ',
'o' => 'ö',
'p' => 'þ',
'q' => 'ǫ',
'r' => 'ŕ',
's' => 'š',
't' => 'ţ',
'u' => 'û',
'v' => 'ṽ',
'w' => 'ŵ',
'x' => 'ẋ',
'y' => 'ý',
'z' => 'ž',
'{' => '(',
'|' => '¦',
'}' => ')',
'~' => '˞',
]) : $text;
}
private function expand(string &$trans, string $visibleText): void
{
if (1.0 >= $this->expansionFactor) {
return;
}
$visibleLength = $this->strlen($visibleText);
$missingLength = (int) (ceil($visibleLength * $this->expansionFactor)) - $visibleLength;
if ($this->brackets) {
$missingLength -= 2;
}
if (0 >= $missingLength) {
return;
}
$words = [];
$wordsCount = 0;
foreach (preg_split('/ +/', $visibleText, -1, \PREG_SPLIT_NO_EMPTY) as $word) {
$wordLength = $this->strlen($word);
if ($wordLength >= $missingLength) {
continue;
}
if (!isset($words[$wordLength])) {
$words[$wordLength] = 0;
}
++$words[$wordLength];
++$wordsCount;
}
if (!$words) {
$trans .= 1 === $missingLength ? self::EXPANSION_CHARACTER : ' '.str_repeat(self::EXPANSION_CHARACTER, $missingLength - 1);
return;
}
arsort($words, \SORT_NUMERIC);
$longestWordLength = max(array_keys($words));
while (true) {
$r = mt_rand(1, $wordsCount);
foreach ($words as $length => $count) {
$r -= $count;
if ($r <= 0) {
break;
}
}
$trans .= ' '.str_repeat(self::EXPANSION_CHARACTER, $length);
$missingLength -= $length + 1;
if (0 === $missingLength) {
return;
}
while ($longestWordLength >= $missingLength) {
$wordsCount -= $words[$longestWordLength];
unset($words[$longestWordLength]);
if (!$words) {
$trans .= 1 === $missingLength ? self::EXPANSION_CHARACTER : ' '.str_repeat(self::EXPANSION_CHARACTER, $missingLength - 1);
return;
}
$longestWordLength = max(array_keys($words));
}
}
}
private function addBrackets(string &$trans): void
{
if (!$this->brackets) {
return;
}
$trans = '['.$trans.']';
}
private function strlen(string $s): int
{
return false === ($encoding = mb_detect_encoding($s, null, true)) ? \strlen($s) : mb_strlen($s, $encoding);
}
}