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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Translation;
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use Symfony\Contracts\Translation\TranslatorInterface;
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/**
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* This translator should only be used in a development environment.
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*/
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final class PseudoLocalizationTranslator implements TranslatorInterface
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{
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private const EXPANSION_CHARACTER = '~';
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private TranslatorInterface $translator;
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private bool $accents;
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private float $expansionFactor;
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private bool $brackets;
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private bool $parseHTML;
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/**
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* @var string[]
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*/
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private array $localizableHTMLAttributes;
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/**
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* Available options:
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* * accents:
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* type: boolean
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* default: true
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* description: replace ASCII characters of the translated string with accented versions or similar characters
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* example: if true, "foo" => "ƒöö".
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*
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* * expansion_factor:
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* type: float
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* default: 1
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* validation: it must be greater than or equal to 1
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* description: expand the translated string by the given factor with spaces and tildes
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* example: if 2, "foo" => "~foo ~"
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*
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* * brackets:
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* type: boolean
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* default: true
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* description: wrap the translated string with brackets
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* example: if true, "foo" => "[foo]"
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*
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* * parse_html:
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* type: boolean
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* default: false
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* 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
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* warning: unclosed tags are unsupported, they will be fixed (closed) by the parser - eg, "foo <div>bar" => "foo <div>bar</div>"
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*
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* * localizable_html_attributes:
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* type: string[]
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* default: []
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* description: the list of HTML attributes whose values can be altered - it is only useful when the "parse_html" option is set to true
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* 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.
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*/
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public function __construct(TranslatorInterface $translator, array $options = [])
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{
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$this->translator = $translator;
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$this->accents = $options['accents'] ?? true;
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if (1.0 > ($this->expansionFactor = $options['expansion_factor'] ?? 1.0)) {
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throw new \InvalidArgumentException('The expansion factor must be greater than or equal to 1.');
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}
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$this->brackets = $options['brackets'] ?? true;
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$this->parseHTML = $options['parse_html'] ?? false;
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if ($this->parseHTML && !$this->accents && 1.0 === $this->expansionFactor) {
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$this->parseHTML = false;
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}
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$this->localizableHTMLAttributes = $options['localizable_html_attributes'] ?? [];
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}
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public function trans(string $id, array $parameters = [], string $domain = null, string $locale = null): string
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{
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$trans = '';
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$visibleText = '';
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foreach ($this->getParts($this->translator->trans($id, $parameters, $domain, $locale)) as [$visible, $localizable, $text]) {
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if ($visible) {
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$visibleText .= $text;
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}
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if (!$localizable) {
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$trans .= $text;
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continue;
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}
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$this->addAccents($trans, $text);
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}
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$this->expand($trans, $visibleText);
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$this->addBrackets($trans);
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return $trans;
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}
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public function getLocale(): string
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{
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return $this->translator->getLocale();
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}
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private function getParts(string $originalTrans): array
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{
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if (!$this->parseHTML) {
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return [[true, true, $originalTrans]];
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}
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$html = mb_encode_numericentity($originalTrans, [0x80, 0xFFFF, 0, 0xFFFF], mb_detect_encoding($originalTrans, null, true) ?: 'UTF-8');
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$useInternalErrors = libxml_use_internal_errors(true);
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$dom = new \DOMDocument();
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$dom->loadHTML('<trans>'.$html.'</trans>');
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libxml_clear_errors();
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libxml_use_internal_errors($useInternalErrors);
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return $this->parseNode($dom->childNodes->item(1)->childNodes->item(0)->childNodes->item(0));
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}
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private function parseNode(\DOMNode $node): array
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{
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$parts = [];
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foreach ($node->childNodes as $childNode) {
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if (!$childNode instanceof \DOMElement) {
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$parts[] = [true, true, $childNode->nodeValue];
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continue;
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}
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$parts[] = [false, false, '<'.$childNode->tagName];
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/** @var \DOMAttr $attribute */
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foreach ($childNode->attributes as $attribute) {
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$parts[] = [false, false, ' '.$attribute->nodeName.'="'];
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$localizableAttribute = \in_array($attribute->nodeName, $this->localizableHTMLAttributes, true);
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foreach (preg_split('/(&(?:amp|quot|#039|lt|gt);+)/', htmlspecialchars($attribute->nodeValue, \ENT_QUOTES, 'UTF-8'), -1, \PREG_SPLIT_DELIM_CAPTURE) as $i => $match) {
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if ('' === $match) {
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continue;
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}
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$parts[] = [false, $localizableAttribute && 0 === $i % 2, $match];
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}
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$parts[] = [false, false, '"'];
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}
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$parts[] = [false, false, '>'];
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$parts = array_merge($parts, $this->parseNode($childNode, $parts));
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$parts[] = [false, false, '</'.$childNode->tagName.'>'];
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}
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return $parts;
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}
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private function addAccents(string &$trans, string $text): void
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{
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$trans .= $this->accents ? strtr($text, [
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' ' => ' ',
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'!' => '¡',
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'"' => '″',
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'#' => '♯',
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'$' => '€',
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'%' => '‰',
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'&' => '⅋',
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'\'' => '´',
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'(' => '{',
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')' => '}',
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'*' => '⁎',
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'+' => '⁺',
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',' => '،',
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'-' => '‐',
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'.' => '·',
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'/' => '⁄',
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'0' => '⓪',
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'1' => '①',
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'2' => '②',
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'3' => '③',
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'4' => '④',
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'5' => '⑤',
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'6' => '⑥',
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'7' => '⑦',
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'8' => '⑧',
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'9' => '⑨',
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':' => '∶',
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';' => '⁏',
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'<' => '≤',
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'=' => '≂',
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'>' => '≥',
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'?' => '¿',
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'@' => '՞',
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'A' => 'Å',
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'B' => 'Ɓ',
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'C' => 'Ç',
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'D' => 'Ð',
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'E' => 'É',
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'F' => 'Ƒ',
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'G' => 'Ĝ',
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'H' => 'Ĥ',
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'I' => 'Î',
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'J' => 'Ĵ',
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'K' => 'Ķ',
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'L' => 'Ļ',
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'M' => 'Ṁ',
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'N' => 'Ñ',
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'O' => 'Ö',
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'P' => 'Þ',
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'Q' => 'Ǫ',
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'R' => 'Ŕ',
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'S' => 'Š',
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'T' => 'Ţ',
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'U' => 'Û',
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'V' => 'Ṽ',
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'W' => 'Ŵ',
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'X' => 'Ẋ',
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'Y' => 'Ý',
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'Z' => 'Ž',
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'[' => '⁅',
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'\\' => '∖',
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']' => '⁆',
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'^' => '˄',
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'_' => '‿',
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'`' => '‵',
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'a' => 'å',
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'b' => 'ƀ',
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'c' => 'ç',
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'd' => 'ð',
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'e' => 'é',
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'f' => 'ƒ',
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'g' => 'ĝ',
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'h' => 'ĥ',
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'i' => 'î',
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'j' => 'ĵ',
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'k' => 'ķ',
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'l' => 'ļ',
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'm' => 'ɱ',
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'n' => 'ñ',
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'o' => 'ö',
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'p' => 'þ',
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'q' => 'ǫ',
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'r' => 'ŕ',
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's' => 'š',
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't' => 'ţ',
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'u' => 'û',
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'v' => 'ṽ',
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'w' => 'ŵ',
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'x' => 'ẋ',
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'y' => 'ý',
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'z' => 'ž',
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'{' => '(',
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'|' => '¦',
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'}' => ')',
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'~' => '˞',
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]) : $text;
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}
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private function expand(string &$trans, string $visibleText): void
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{
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if (1.0 >= $this->expansionFactor) {
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return;
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}
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$visibleLength = $this->strlen($visibleText);
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$missingLength = (int) ceil($visibleLength * $this->expansionFactor) - $visibleLength;
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if ($this->brackets) {
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$missingLength -= 2;
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}
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if (0 >= $missingLength) {
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return;
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}
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$words = [];
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$wordsCount = 0;
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foreach (preg_split('/ +/', $visibleText, -1, \PREG_SPLIT_NO_EMPTY) as $word) {
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$wordLength = $this->strlen($word);
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if ($wordLength >= $missingLength) {
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continue;
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}
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if (!isset($words[$wordLength])) {
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$words[$wordLength] = 0;
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}
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++$words[$wordLength];
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++$wordsCount;
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}
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if (!$words) {
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$trans .= 1 === $missingLength ? self::EXPANSION_CHARACTER : ' '.str_repeat(self::EXPANSION_CHARACTER, $missingLength - 1);
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return;
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}
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arsort($words, \SORT_NUMERIC);
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$longestWordLength = max(array_keys($words));
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while (true) {
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$r = mt_rand(1, $wordsCount);
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foreach ($words as $length => $count) {
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$r -= $count;
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if ($r <= 0) {
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break;
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}
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}
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$trans .= ' '.str_repeat(self::EXPANSION_CHARACTER, $length);
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$missingLength -= $length + 1;
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if (0 === $missingLength) {
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return;
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}
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while ($longestWordLength >= $missingLength) {
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$wordsCount -= $words[$longestWordLength];
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unset($words[$longestWordLength]);
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if (!$words) {
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$trans .= 1 === $missingLength ? self::EXPANSION_CHARACTER : ' '.str_repeat(self::EXPANSION_CHARACTER, $missingLength - 1);
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return;
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}
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$longestWordLength = max(array_keys($words));
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}
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}
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}
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private function addBrackets(string &$trans): void
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{
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if (!$this->brackets) {
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return;
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}
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$trans = '['.$trans.']';
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}
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private function strlen(string $s): int
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{
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return false === ($encoding = mb_detect_encoding($s, null, true)) ? \strlen($s) : mb_strlen($s, $encoding);
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}
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}
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