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<?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\Operator;
use PhpCsFixer\Fixer\AbstractIncrementOperatorFixer;
use PhpCsFixer\Fixer\ConfigurableFixerInterface;
use PhpCsFixer\FixerConfiguration\FixerConfigurationResolver;
use PhpCsFixer\FixerConfiguration\FixerConfigurationResolverInterface;
use PhpCsFixer\FixerConfiguration\FixerOptionBuilder;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\FixerDefinition\FixerDefinitionInterface;
use PhpCsFixer\Tokenizer\CT;
use PhpCsFixer\Tokenizer\Tokens;
use PhpCsFixer\Tokenizer\TokensAnalyzer;
/**
* @author Gregor Harlan <gharlan@web.de>
* @author Kuba Werłos <werlos@gmail.com>
*/
final class IncrementStyleFixer extends AbstractIncrementOperatorFixer implements ConfigurableFixerInterface
{
/**
* @internal
*/
public const STYLE_PRE = 'pre';
/**
* @internal
*/
public const STYLE_POST = 'post';
/**
* {@inheritdoc}
*/
public function getDefinition(): FixerDefinitionInterface
{
return new FixerDefinition(
'Pre- or post-increment and decrement operators should be used if possible.',
[
new CodeSample("<?php\n\$a++;\n\$b--;\n"),
new CodeSample(
"<?php\n++\$a;\n--\$b;\n",
['style' => self::STYLE_POST]
),
]
);
}
/**
* {@inheritdoc}
*
* Must run after StandardizeIncrementFixer.
*/
public function getPriority(): int
{
return 0;
}
/**
* {@inheritdoc}
*/
public function isCandidate(Tokens $tokens): bool
{
return $tokens->isAnyTokenKindsFound([T_INC, T_DEC]);
}
/**
* {@inheritdoc}
*/
protected function createConfigurationDefinition(): FixerConfigurationResolverInterface
{
return new FixerConfigurationResolver([
(new FixerOptionBuilder('style', 'Whether to use pre- or post-increment and decrement operators.'))
->setAllowedValues([self::STYLE_PRE, self::STYLE_POST])
->setDefault(self::STYLE_PRE)
->getOption(),
]);
}
/**
* {@inheritdoc}
*/
protected function applyFix(\SplFileInfo $file, Tokens $tokens): void
{
$tokensAnalyzer = new TokensAnalyzer($tokens);
for ($index = $tokens->count() - 1; 0 <= $index; --$index) {
$token = $tokens[$index];
if (!$token->isGivenKind([T_INC, T_DEC])) {
continue;
}
if (self::STYLE_PRE === $this->configuration['style'] && $tokensAnalyzer->isUnarySuccessorOperator($index)) {
$nextToken = $tokens[$tokens->getNextMeaningfulToken($index)];
if (!$nextToken->equalsAny([';', ')'])) {
continue;
}
$startIndex = $this->findStart($tokens, $index);
$prevToken = $tokens[$tokens->getPrevMeaningfulToken($startIndex)];
if ($prevToken->equalsAny([';', '{', '}', [T_OPEN_TAG], ')'])) {
$tokens->clearAt($index);
$tokens->insertAt($startIndex, clone $token);
}
} elseif (self::STYLE_POST === $this->configuration['style'] && $tokensAnalyzer->isUnaryPredecessorOperator($index)) {
$prevToken = $tokens[$tokens->getPrevMeaningfulToken($index)];
if (!$prevToken->equalsAny([';', '{', '}', [T_OPEN_TAG], ')'])) {
continue;
}
$endIndex = $this->findEnd($tokens, $index);
$nextToken = $tokens[$tokens->getNextMeaningfulToken($endIndex)];
if ($nextToken->equalsAny([';', ')'])) {
$tokens->clearAt($index);
$tokens->insertAt($tokens->getNextNonWhitespace($endIndex), clone $token);
}
}
}
}
private function findEnd(Tokens $tokens, int $index): int
{
$nextIndex = $tokens->getNextMeaningfulToken($index);
$nextToken = $tokens[$nextIndex];
while ($nextToken->equalsAny([
'$',
'(',
'[',
[CT::T_DYNAMIC_PROP_BRACE_OPEN],
[CT::T_DYNAMIC_VAR_BRACE_OPEN],
[CT::T_ARRAY_INDEX_CURLY_BRACE_OPEN],
[T_NS_SEPARATOR],
[T_STATIC],
[T_STRING],
[T_VARIABLE],
])) {
$blockType = Tokens::detectBlockType($nextToken);
if (null !== $blockType) {
$nextIndex = $tokens->findBlockEnd($blockType['type'], $nextIndex);
}
$index = $nextIndex;
$nextIndex = $tokens->getNextMeaningfulToken($nextIndex);
$nextToken = $tokens[$nextIndex];
}
if ($nextToken->isObjectOperator()) {
return $this->findEnd($tokens, $nextIndex);
}
if ($nextToken->isGivenKind(T_PAAMAYIM_NEKUDOTAYIM)) {
return $this->findEnd($tokens, $tokens->getNextMeaningfulToken($nextIndex));
}
return $index;
}
}
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