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NoUnneededAliasFixer.php
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NoUnneededAliasFixer.php
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<?php
/*
* 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\Import;
use PhpCsFixer\AbstractFixer;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\Tokenizer\Analyzer\Analysis\NamespaceUseAnalysis;
use PhpCsFixer\Tokenizer\Analyzer\NamespaceUsesAnalyzer;
use PhpCsFixer\Tokenizer\Tokens;
final class NoUnneededAliasFixer extends AbstractFixer
{
/**
* {@inheritdoc}
*/
public function getDefinition()
{
return new FixerDefinition(
'Remove unneeded alias in `use` clauses.',
[new CodeSample("<?php\nnamespace Foo;\nuse Bar\\Baz as Baz;\n")]
);
}
/**
* {@inheritdoc}
*/
public function getPriority()
{
// should be run after the SingleImportPerStatementFixer (for fix separated use statements as well) and NoUnusedImportsFixer (just for save performance) and NoLeadingImportSlashFixer
return -25;
}
/**
* {@inheritdoc}
*/
public function isCandidate(Tokens $tokens)
{
return $tokens->isTokenKindFound(T_USE);
}
/**
* {@inheritdoc}
*/
protected function applyFix(\SplFileInfo $file, Tokens $tokens)
{
$useDeclarations = (new NamespaceUsesAnalyzer())->getDeclarationsFromTokens($tokens);
if (0 === \count($useDeclarations)) {
return;
}
foreach ($useDeclarations as $declaration) {
if (!$declaration->isAliased()) {
continue;
}
$shortNameStartPos = strrpos($declaration->getFullName(), '\\');
$shortName = false === $shortNameStartPos ? $declaration->getFullName() : substr($declaration->getFullName(), $shortNameStartPos + 1);
if ($declaration->getShortName() !== $shortName) {
continue;
}
$this->removeAlias($tokens, $declaration);
}
}
private function removeAlias(Tokens $tokens, NamespaceUseAnalysis $declaration)
{
// no fix if any comment found.
$commentIndex = $tokens->getNextTokenOfKind($declaration->getStartIndex(), [[T_COMMENT], [T_DOC_COMMENT]]);
if (null !== $commentIndex && $commentIndex <= $declaration->getEndIndex()) {
return;
}
$asIndex = $tokens->getNextTokenOfKind($declaration->getStartIndex(), [[T_AS]]);
if (null === $asIndex || $asIndex > $declaration->getEndIndex()) {
return;
}
$tokens->clearRange($tokens->getPrevMeaningfulToken($asIndex) + 1, $declaration->getEndIndex() - 1);
}
}