Current File : /home/vacivi36/code/vendor/friendsofphp/php-cs-fixer/src/Fixer/Comment/NoEmptyCommentFixer.php
<?php
declare(strict_types=1);
/*
* This file is part of PHP CS Fixer.
*
* (c) Fabien Potencier <fabien@symfony.com>
* Dariusz Rumiński <dariusz.ruminski@gmail.com>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace PhpCsFixer\Fixer\Comment;
use PhpCsFixer\AbstractFixer;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\FixerDefinition\FixerDefinitionInterface;
use PhpCsFixer\Preg;
use PhpCsFixer\Tokenizer\Tokens;
final class NoEmptyCommentFixer extends AbstractFixer
{
private const TYPE_HASH = 1;
private const TYPE_DOUBLE_SLASH = 2;
private const TYPE_SLASH_ASTERISK = 3;
/**
* {@inheritdoc}
*
* Must run before NoExtraBlankLinesFixer, NoTrailingWhitespaceFixer, NoWhitespaceInBlankLineFixer.
* Must run after PhpdocToCommentFixer.
*/
public function getPriority(): int
{
return 2;
}
/**
* {@inheritdoc}
*/
public function getDefinition(): FixerDefinitionInterface
{
return new FixerDefinition(
'There should not be any empty comments.',
[new CodeSample("<?php\n//\n#\n/* */\n")]
);
}
/**
* {@inheritdoc}
*/
public function isCandidate(Tokens $tokens): bool
{
return $tokens->isTokenKindFound(T_COMMENT);
}
/**
* {@inheritdoc}
*/
protected function applyFix(\SplFileInfo $file, Tokens $tokens): void
{
for ($index = 1, $count = \count($tokens); $index < $count; ++$index) {
if (!$tokens[$index]->isGivenKind(T_COMMENT)) {
continue;
}
[$blockStart, $index, $isEmpty] = $this->getCommentBlock($tokens, $index);
if (false === $isEmpty) {
continue;
}
for ($i = $blockStart; $i <= $index; ++$i) {
$tokens->clearTokenAndMergeSurroundingWhitespace($i);
}
}
}
/**
* Return the start index, end index and a flag stating if the comment block is empty.
*
* @param int $index T_COMMENT index
*/
private function getCommentBlock(Tokens $tokens, int $index): array
{
$commentType = $this->getCommentType($tokens[$index]->getContent());
$empty = $this->isEmptyComment($tokens[$index]->getContent());
if (self::TYPE_SLASH_ASTERISK === $commentType) {
return [$index, $index, $empty];
}
$start = $index;
$count = \count($tokens);
++$index;
for (; $index < $count; ++$index) {
if ($tokens[$index]->isComment()) {
if ($commentType !== $this->getCommentType($tokens[$index]->getContent())) {
break;
}
if ($empty) { // don't retest if already known the block not being empty
$empty = $this->isEmptyComment($tokens[$index]->getContent());
}
continue;
}
if (!$tokens[$index]->isWhitespace() || $this->getLineBreakCount($tokens, $index, $index + 1) > 1) {
break;
}
}
return [$start, $index - 1, $empty];
}
private function getCommentType(string $content): int
{
if (str_starts_with($content, '#')) {
return self::TYPE_HASH;
}
if ('*' === $content[1]) {
return self::TYPE_SLASH_ASTERISK;
}
return self::TYPE_DOUBLE_SLASH;
}
private function getLineBreakCount(Tokens $tokens, int $whiteStart, int $whiteEnd): int
{
$lineCount = 0;
for ($i = $whiteStart; $i < $whiteEnd; ++$i) {
$lineCount += Preg::matchAll('/\R/u', $tokens[$i]->getContent(), $matches);
}
return $lineCount;
}
private function isEmptyComment(string $content): bool
{
static $mapper = [
self::TYPE_HASH => '|^#\s*$|', // single line comment starting with '#'
self::TYPE_SLASH_ASTERISK => '|^/\*[\s\*]*\*+/$|', // comment starting with '/*' and ending with '*/' (but not a PHPDoc)
self::TYPE_DOUBLE_SLASH => '|^//\s*$|', // single line comment starting with '//'
];
$type = $this->getCommentType($content);
return 1 === Preg::match($mapper[$type], $content);
}
}
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