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<?php
/**
 * Verifies that operators have valid spacing surrounding them.
 *
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 */

namespace PHP_CodeSniffer\Standards\PSR12\Sniffs\Operators;

use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Standards\Squiz\Sniffs\WhiteSpace\OperatorSpacingSniff as SquizOperatorSpacingSniff;
use PHP_CodeSniffer\Util\Tokens;

class OperatorSpacingSniff extends SquizOperatorSpacingSniff
{

/**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register()
    {
        parent::register();

$targets   = Tokens::$comparisonTokens;
        $targets  += Tokens::$operators;
        $targets  += Tokens::$assignmentTokens;
        $targets  += Tokens::$booleanOperators;
        $targets[] = T_INLINE_THEN;
        $targets[] = T_INLINE_ELSE;
        $targets[] = T_STRING_CONCAT;
        $targets[] = T_INSTANCEOF;

// Also register the contexts we want to specifically skip over.
        $targets[] = T_DECLARE;

return $targets;

}//end register()

/**
     * Processes this sniff, when one of its tokens is encountered.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The current file being checked.
     * @param int                         $stackPtr  The position of the current token in
     *                                               the stack passed in $tokens.
     *
     * @return void|int Optionally returns a stack pointer. The sniff will not be
     *                  called again on the current file until the returned stack
     *                  pointer is reached. Return `$phpcsFile->numTokens` to skip
     *                  the rest of the file.
     */
    public function process(File $phpcsFile, $stackPtr)
    {
        $tokens = $phpcsFile->getTokens();

// Skip over declare statements as those should be handled by different sniffs.
        if ($tokens[$stackPtr]['code'] === T_DECLARE) {
            if (isset($tokens[$stackPtr]['parenthesis_closer']) === false) {
                // Parse error / live coding.
                return $phpcsFile->numTokens;
            }

return $tokens[$stackPtr]['parenthesis_closer'];
        }

if ($this->isOperator($phpcsFile, $stackPtr) === false) {
            return;
        }

$operator = $tokens[$stackPtr]['content'];

$checkBefore = true;
        $checkAfter  = true;

// Skip short ternary.
        if ($tokens[($stackPtr)]['code'] === T_INLINE_ELSE
            && $tokens[($stackPtr - 1)]['code'] === T_INLINE_THEN
        ) {
            $checkBefore = false;
        }

// Skip operator with comment on previous line.
        if ($tokens[($stackPtr - 1)]['code'] === T_COMMENT
            && $tokens[($stackPtr - 1)]['line'] < $tokens[$stackPtr]['line']
        ) {
            $checkBefore = false;
        }

if (isset($tokens[($stackPtr + 1)]) === true) {
            // Skip short ternary.
            if ($tokens[$stackPtr]['code'] === T_INLINE_THEN
                && $tokens[($stackPtr + 1)]['code'] === T_INLINE_ELSE
            ) {
                $checkAfter = false;
            }
        } else {
            // Skip partial files.
            $checkAfter = false;
        }

if ($checkBefore === true && $tokens[($stackPtr - 1)]['code'] !== T_WHITESPACE) {
            $error = 'Expected at least 1 space before "%s"; 0 found';
            $data  = [$operator];
            $fix   = $phpcsFile->addFixableError($error, $stackPtr, 'NoSpaceBefore', $data);
            if ($fix === true) {
                $phpcsFile->fixer->addContentBefore($stackPtr, ' ');
            }
        }

if ($checkAfter === true && $tokens[($stackPtr + 1)]['code'] !== T_WHITESPACE) {
            $error = 'Expected at least 1 space after "%s"; 0 found';
            $data  = [$operator];
            $fix   = $phpcsFile->addFixableError($error, $stackPtr, 'NoSpaceAfter', $data);
            if ($fix === true) {
                $phpcsFile->fixer->addContent($stackPtr, ' ');
            }
        }

}//end process()

}//end class

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