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