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- <?php
- /*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- namespace Symfony\Component\String;
- use Symfony\Component\String\Exception\ExceptionInterface;
- use Symfony\Component\String\Exception\InvalidArgumentException;
- /**
- * Represents a string of Unicode grapheme clusters encoded as UTF-8.
- *
- * A letter followed by combining characters (accents typically) form what Unicode defines
- * as a grapheme cluster: a character as humans mean it in written texts. This class knows
- * about the concept and won't split a letter apart from its combining accents. It also
- * ensures all string comparisons happen on their canonically-composed representation,
- * ignoring e.g. the order in which accents are listed when a letter has many of them.
- *
- * @see https://unicode.org/reports/tr15/
- *
- * @author Nicolas Grekas <p@tchwork.com>
- * @author Hugo Hamon <hugohamon@neuf.fr>
- *
- * @throws ExceptionInterface
- */
- class UnicodeString extends AbstractUnicodeString
- {
- public function __construct(string $string = '')
- {
- $this->string = normalizer_is_normalized($string) ? $string : normalizer_normalize($string);
- if (false === $this->string) {
- throw new InvalidArgumentException('Invalid UTF-8 string.');
- }
- }
- public function append(string ...$suffix): AbstractString
- {
- $str = clone $this;
- $str->string = $this->string.(1 >= \count($suffix) ? ($suffix[0] ?? '') : implode('', $suffix));
- normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string);
- if (false === $str->string) {
- throw new InvalidArgumentException('Invalid UTF-8 string.');
- }
- return $str;
- }
- public function chunk(int $length = 1): array
- {
- if (1 > $length) {
- throw new InvalidArgumentException('The chunk length must be greater than zero.');
- }
- if ('' === $this->string) {
- return [];
- }
- $rx = '/(';
- while (65535 < $length) {
- $rx .= '\X{65535}';
- $length -= 65535;
- }
- $rx .= '\X{'.$length.'})/u';
- $str = clone $this;
- $chunks = [];
- foreach (preg_split($rx, $this->string, -1, \PREG_SPLIT_DELIM_CAPTURE | \PREG_SPLIT_NO_EMPTY) as $chunk) {
- $str->string = $chunk;
- $chunks[] = clone $str;
- }
- return $chunks;
- }
- public function endsWith($suffix): bool
- {
- if ($suffix instanceof AbstractString) {
- $suffix = $suffix->string;
- } elseif (\is_array($suffix) || $suffix instanceof \Traversable) {
- return parent::endsWith($suffix);
- } else {
- $suffix = (string) $suffix;
- }
- $form = null === $this->ignoreCase ? \Normalizer::NFD : \Normalizer::NFC;
- normalizer_is_normalized($suffix, $form) ?: $suffix = normalizer_normalize($suffix, $form);
- if ('' === $suffix || false === $suffix) {
- return false;
- }
- if ($this->ignoreCase) {
- return 0 === mb_stripos(grapheme_extract($this->string, \strlen($suffix), \GRAPHEME_EXTR_MAXBYTES, \strlen($this->string) - \strlen($suffix)), $suffix, 0, 'UTF-8');
- }
- return $suffix === grapheme_extract($this->string, \strlen($suffix), \GRAPHEME_EXTR_MAXBYTES, \strlen($this->string) - \strlen($suffix));
- }
- public function equalsTo($string): bool
- {
- if ($string instanceof AbstractString) {
- $string = $string->string;
- } elseif (\is_array($string) || $string instanceof \Traversable) {
- return parent::equalsTo($string);
- } else {
- $string = (string) $string;
- }
- $form = null === $this->ignoreCase ? \Normalizer::NFD : \Normalizer::NFC;
- normalizer_is_normalized($string, $form) ?: $string = normalizer_normalize($string, $form);
- if ('' !== $string && false !== $string && $this->ignoreCase) {
- return \strlen($string) === \strlen($this->string) && 0 === mb_stripos($this->string, $string, 0, 'UTF-8');
- }
- return $string === $this->string;
- }
- public function indexOf($needle, int $offset = 0): ?int
- {
- if ($needle instanceof AbstractString) {
- $needle = $needle->string;
- } elseif (\is_array($needle) || $needle instanceof \Traversable) {
- return parent::indexOf($needle, $offset);
- } else {
- $needle = (string) $needle;
- }
- $form = null === $this->ignoreCase ? \Normalizer::NFD : \Normalizer::NFC;
- normalizer_is_normalized($needle, $form) ?: $needle = normalizer_normalize($needle, $form);
- if ('' === $needle || false === $needle) {
- return null;
- }
- try {
- $i = $this->ignoreCase ? grapheme_stripos($this->string, $needle, $offset) : grapheme_strpos($this->string, $needle, $offset);
- } catch (\ValueError $e) {
- return null;
- }
- return false === $i ? null : $i;
- }
- public function indexOfLast($needle, int $offset = 0): ?int
- {
- if ($needle instanceof AbstractString) {
- $needle = $needle->string;
- } elseif (\is_array($needle) || $needle instanceof \Traversable) {
- return parent::indexOfLast($needle, $offset);
- } else {
- $needle = (string) $needle;
- }
- $form = null === $this->ignoreCase ? \Normalizer::NFD : \Normalizer::NFC;
- normalizer_is_normalized($needle, $form) ?: $needle = normalizer_normalize($needle, $form);
- if ('' === $needle || false === $needle) {
- return null;
- }
- $string = $this->string;
- if (0 > $offset) {
- // workaround https://bugs.php.net/74264
- if (0 > $offset += grapheme_strlen($needle)) {
- $string = grapheme_substr($string, 0, $offset);
- }
- $offset = 0;
- }
- $i = $this->ignoreCase ? grapheme_strripos($string, $needle, $offset) : grapheme_strrpos($string, $needle, $offset);
- return false === $i ? null : $i;
- }
- public function join(array $strings, string $lastGlue = null): AbstractString
- {
- $str = parent::join($strings, $lastGlue);
- normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string);
- return $str;
- }
- public function length(): int
- {
- return grapheme_strlen($this->string);
- }
- /**
- * @return static
- */
- public function normalize(int $form = self::NFC): parent
- {
- $str = clone $this;
- if (\in_array($form, [self::NFC, self::NFKC], true)) {
- normalizer_is_normalized($str->string, $form) ?: $str->string = normalizer_normalize($str->string, $form);
- } elseif (!\in_array($form, [self::NFD, self::NFKD], true)) {
- throw new InvalidArgumentException('Unsupported normalization form.');
- } elseif (!normalizer_is_normalized($str->string, $form)) {
- $str->string = normalizer_normalize($str->string, $form);
- $str->ignoreCase = null;
- }
- return $str;
- }
- public function prepend(string ...$prefix): AbstractString
- {
- $str = clone $this;
- $str->string = (1 >= \count($prefix) ? ($prefix[0] ?? '') : implode('', $prefix)).$this->string;
- normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string);
- if (false === $str->string) {
- throw new InvalidArgumentException('Invalid UTF-8 string.');
- }
- return $str;
- }
- public function replace(string $from, string $to): AbstractString
- {
- $str = clone $this;
- normalizer_is_normalized($from) ?: $from = normalizer_normalize($from);
- if ('' !== $from && false !== $from) {
- $tail = $str->string;
- $result = '';
- $indexOf = $this->ignoreCase ? 'grapheme_stripos' : 'grapheme_strpos';
- while ('' !== $tail && false !== $i = $indexOf($tail, $from)) {
- $slice = grapheme_substr($tail, 0, $i);
- $result .= $slice.$to;
- $tail = substr($tail, \strlen($slice) + \strlen($from));
- }
- $str->string = $result.$tail;
- normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string);
- if (false === $str->string) {
- throw new InvalidArgumentException('Invalid UTF-8 string.');
- }
- }
- return $str;
- }
- public function replaceMatches(string $fromRegexp, $to): AbstractString
- {
- $str = parent::replaceMatches($fromRegexp, $to);
- normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string);
- return $str;
- }
- public function slice(int $start = 0, int $length = null): AbstractString
- {
- $str = clone $this;
- if (\PHP_VERSION_ID < 80000 && 0 > $start && grapheme_strlen($this->string) < -$start) {
- $start = 0;
- }
- $str->string = (string) grapheme_substr($this->string, $start, $length ?? 2147483647);
- return $str;
- }
- public function splice(string $replacement, int $start = 0, int $length = null): AbstractString
- {
- $str = clone $this;
- if (\PHP_VERSION_ID < 80000 && 0 > $start && grapheme_strlen($this->string) < -$start) {
- $start = 0;
- }
- $start = $start ? \strlen(grapheme_substr($this->string, 0, $start)) : 0;
- $length = $length ? \strlen(grapheme_substr($this->string, $start, $length ?? 2147483647)) : $length;
- $str->string = substr_replace($this->string, $replacement, $start, $length ?? 2147483647);
- normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string);
- if (false === $str->string) {
- throw new InvalidArgumentException('Invalid UTF-8 string.');
- }
- return $str;
- }
- public function split(string $delimiter, int $limit = null, int $flags = null): array
- {
- if (1 > $limit = $limit ?? 2147483647) {
- throw new InvalidArgumentException('Split limit must be a positive integer.');
- }
- if ('' === $delimiter) {
- throw new InvalidArgumentException('Split delimiter is empty.');
- }
- if (null !== $flags) {
- return parent::split($delimiter.'u', $limit, $flags);
- }
- normalizer_is_normalized($delimiter) ?: $delimiter = normalizer_normalize($delimiter);
- if (false === $delimiter) {
- throw new InvalidArgumentException('Split delimiter is not a valid UTF-8 string.');
- }
- $str = clone $this;
- $tail = $this->string;
- $chunks = [];
- $indexOf = $this->ignoreCase ? 'grapheme_stripos' : 'grapheme_strpos';
- while (1 < $limit && false !== $i = $indexOf($tail, $delimiter)) {
- $str->string = grapheme_substr($tail, 0, $i);
- $chunks[] = clone $str;
- $tail = substr($tail, \strlen($str->string) + \strlen($delimiter));
- --$limit;
- }
- $str->string = $tail;
- $chunks[] = clone $str;
- return $chunks;
- }
- public function startsWith($prefix): bool
- {
- if ($prefix instanceof AbstractString) {
- $prefix = $prefix->string;
- } elseif (\is_array($prefix) || $prefix instanceof \Traversable) {
- return parent::startsWith($prefix);
- } else {
- $prefix = (string) $prefix;
- }
- $form = null === $this->ignoreCase ? \Normalizer::NFD : \Normalizer::NFC;
- normalizer_is_normalized($prefix, $form) ?: $prefix = normalizer_normalize($prefix, $form);
- if ('' === $prefix || false === $prefix) {
- return false;
- }
- if ($this->ignoreCase) {
- return 0 === mb_stripos(grapheme_extract($this->string, \strlen($prefix), \GRAPHEME_EXTR_MAXBYTES), $prefix, 0, 'UTF-8');
- }
- return $prefix === grapheme_extract($this->string, \strlen($prefix), \GRAPHEME_EXTR_MAXBYTES);
- }
- public function __wakeup()
- {
- if (!\is_string($this->string)) {
- throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
- }
- normalizer_is_normalized($this->string) ?: $this->string = normalizer_normalize($this->string);
- }
- public function __clone()
- {
- if (null === $this->ignoreCase) {
- normalizer_is_normalized($this->string) ?: $this->string = normalizer_normalize($this->string);
- }
- $this->ignoreCase = false;
- }
- }
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