InlineCommentSniff.php in Coder 8.3

Namespace

Drupal\Sniffs\Commenting

File

coder_sniffer/Drupal/Sniffs/Commenting/InlineCommentSniff.php

<?php

/**
 * \Drupal\Sniffs\Commenting\InlineCommentSniff.
 *
 * @category PHP
 * @package  PHP_CodeSniffer
 * @link     http://pear.php.net/package/PHP_CodeSniffer
 */
namespace Drupal\Sniffs\Commenting;

use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;
use PHP_CodeSniffer\Util\Tokens;

/**
 * \Drupal\Sniffs\Commenting\InlineCommentSniff.
 *
 * Checks that no perl-style comments are used. Checks that inline comments ("//")
 * have a space after //, start capitalized and end with proper punctuation.
 * Largely copied from
 * \PHP_CodeSniffer\Standards\Squiz\Sniffs\Commenting\InlineCommentSniff.
 *
 * @category PHP
 * @package  PHP_CodeSniffer
 * @link     http://pear.php.net/package/PHP_CodeSniffer
 */
class InlineCommentSniff implements Sniff {

  /**
   * Returns an array of tokens this test wants to listen for.
   *
   * @return array<int|string>
   */
  public function register() {
    return [
      T_COMMENT,
      T_DOC_COMMENT_OPEN_TAG,
    ];
  }

  //end register()

  /**
   * Processes this test, when one of its tokens is encountered.
   *
   * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned.
   * @param int                         $stackPtr  The position of the current token in the
   *                                               stack passed in $tokens.
   *
   * @return int|void
   */
  public function process(File $phpcsFile, $stackPtr) {
    $tokens = $phpcsFile
      ->getTokens();

    // If this is a function/class/interface doc block comment, skip it.
    // We are only interested in inline doc block comments, which are
    // not allowed.
    if ($tokens[$stackPtr]['code'] === T_DOC_COMMENT_OPEN_TAG) {
      $nextToken = $phpcsFile
        ->findNext(Tokens::$emptyTokens, $stackPtr + 1, null, true);
      $ignore = [
        T_CLASS,
        T_INTERFACE,
        T_TRAIT,
        T_FUNCTION,
        T_CLOSURE,
        T_PUBLIC,
        T_PRIVATE,
        T_PROTECTED,
        T_FINAL,
        T_STATIC,
        T_ABSTRACT,
        T_CONST,
        T_PROPERTY,
        T_INCLUDE,
        T_INCLUDE_ONCE,
        T_REQUIRE,
        T_REQUIRE_ONCE,
        T_VAR,
      ];

      // Also ignore all doc blocks defined in the outer scope (no scope
      // conditions are set).
      if (in_array($tokens[$nextToken]['code'], $ignore, true) === true || empty($tokens[$stackPtr]['conditions']) === true) {
        return;
      }
      if ($phpcsFile->tokenizerType === 'JS') {

        // We allow block comments if a function or object
        // is being assigned to a variable.
        $ignore = Tokens::$emptyTokens;
        $ignore[] = T_EQUAL;
        $ignore[] = T_STRING;
        $ignore[] = T_OBJECT_OPERATOR;
        $nextToken = $phpcsFile
          ->findNext($ignore, $nextToken + 1, null, true);
        if ($tokens[$nextToken]['code'] === T_FUNCTION || $tokens[$nextToken]['code'] === T_CLOSURE || $tokens[$nextToken]['code'] === T_OBJECT || $tokens[$nextToken]['code'] === T_PROTOTYPE) {
          return;
        }
      }
      $prevToken = $phpcsFile
        ->findPrevious(Tokens::$emptyTokens, $stackPtr - 1, null, true);
      if ($tokens[$prevToken]['code'] === T_OPEN_TAG) {
        return;
      }

      // Inline doc blocks are allowed in JSDoc.
      if ($tokens[$stackPtr]['content'] === '/**' && $phpcsFile->tokenizerType !== 'JS') {

        // The only exception to inline doc blocks is the /** @var */
        // declaration. Allow that in any form.
        $varTag = $phpcsFile
          ->findNext([
          T_DOC_COMMENT_TAG,
        ], $stackPtr + 1, $tokens[$stackPtr]['comment_closer'], false, '@var');
        if ($varTag === false) {
          $error = 'Inline doc block comments are not allowed; use "/* Comment */" or "// Comment" instead';
          $phpcsFile
            ->addError($error, $stackPtr, 'DocBlock');
        }
      }
    }

    //end if
    if ($tokens[$stackPtr]['content'][0] === '#') {
      $error = 'Perl-style comments are not allowed; use "// Comment" instead';
      $fix = $phpcsFile
        ->addFixableError($error, $stackPtr, 'WrongStyle');
      if ($fix === true) {
        $comment = ltrim($tokens[$stackPtr]['content'], "# \t");
        $phpcsFile->fixer
          ->replaceToken($stackPtr, "// {$comment}");
      }
    }

    // We don't want end of block comments. Check if the last token before the
    // comment is a closing curly brace.
    $previousContent = $phpcsFile
      ->findPrevious(T_WHITESPACE, $stackPtr - 1, null, true);
    if ($tokens[$previousContent]['line'] === $tokens[$stackPtr]['line']) {
      if ($tokens[$previousContent]['code'] === T_CLOSE_CURLY_BRACKET) {
        return;
      }

      // Special case for JS files.
      if ($tokens[$previousContent]['code'] === T_COMMA || $tokens[$previousContent]['code'] === T_SEMICOLON) {
        $lastContent = $phpcsFile
          ->findPrevious(T_WHITESPACE, $previousContent - 1, null, true);
        if ($tokens[$lastContent]['code'] === T_CLOSE_CURLY_BRACKET) {
          return;
        }
      }
    }

    // Only want inline comments.
    if (substr($tokens[$stackPtr]['content'], 0, 2) !== '//') {
      return;
    }

    // Ignore code example lines.
    if ($this
      ->isInCodeExample($phpcsFile, $stackPtr) === true) {
      return;
    }
    $commentTokens = [
      $stackPtr,
    ];
    $nextComment = $stackPtr;
    $lastComment = $stackPtr;
    while (($nextComment = $phpcsFile
      ->findNext(T_COMMENT, $nextComment + 1, null, false)) !== false) {
      if ($tokens[$nextComment]['line'] !== $tokens[$lastComment]['line'] + 1) {
        break;
      }

      // Only want inline comments.
      if (substr($tokens[$nextComment]['content'], 0, 2) !== '//') {
        break;
      }

      // There is a comment on the very next line. If there is
      // no code between the comments, they are part of the same
      // comment block.
      $prevNonWhitespace = $phpcsFile
        ->findPrevious(T_WHITESPACE, $nextComment - 1, $lastComment, true);
      if ($prevNonWhitespace !== $lastComment) {
        break;
      }

      // A comment starting with "@" means a new comment section.
      if (preg_match('|^//[\\s]*@|', $tokens[$nextComment]['content']) === 1) {
        break;
      }
      $commentTokens[] = $nextComment;
      $lastComment = $nextComment;
    }

    //end while
    $commentText = '';
    $lastCommentToken = $stackPtr;
    foreach ($commentTokens as $lastCommentToken) {
      $comment = rtrim($tokens[$lastCommentToken]['content']);
      if (trim(substr($comment, 2)) === '') {
        continue;
      }
      $spaceCount = 0;
      $tabFound = false;
      $commentLength = strlen($comment);
      for ($i = 2; $i < $commentLength; $i++) {
        if ($comment[$i] === "\t") {
          $tabFound = true;
          break;
        }
        if ($comment[$i] !== ' ') {
          break;
        }
        $spaceCount++;
      }
      $fix = false;
      if ($tabFound === true) {
        $error = 'Tab found before comment text; expected "// %s" but found "%s"';
        $data = [
          ltrim(substr($comment, 2)),
          $comment,
        ];
        $fix = $phpcsFile
          ->addFixableError($error, $lastCommentToken, 'TabBefore', $data);
      }
      else {
        if ($spaceCount === 0) {
          $error = 'No space found before comment text; expected "// %s" but found "%s"';
          $data = [
            substr($comment, 2),
            $comment,
          ];
          $fix = $phpcsFile
            ->addFixableError($error, $lastCommentToken, 'NoSpaceBefore', $data);
        }
      }

      //end if
      if ($fix === true) {
        $newComment = '// ' . ltrim($tokens[$lastCommentToken]['content'], "/\t ");
        $phpcsFile->fixer
          ->replaceToken($lastCommentToken, $newComment);
      }
      if ($spaceCount > 1) {

        // Check if there is a comment on the previous line that justifies the
        // indentation.
        $prevComment = $phpcsFile
          ->findPrevious([
          T_COMMENT,
        ], $lastCommentToken - 1, null, false);
        if ($prevComment !== false && $tokens[$prevComment]['line'] === $tokens[$lastCommentToken]['line'] - 1) {
          $prevCommentText = rtrim($tokens[$prevComment]['content']);
          $prevSpaceCount = 0;
          for ($i = 2; $i < strlen($prevCommentText); $i++) {
            if ($prevCommentText[$i] !== ' ') {
              break;
            }
            $prevSpaceCount++;
          }
          if ($spaceCount > $prevSpaceCount && $prevSpaceCount > 0) {

            // A previous comment could be a list item or @todo.
            $indentationStarters = [
              '-',
              '@todo',
            ];
            $words = preg_split('/\\s+/', $prevCommentText);
            $numberedList = (bool) preg_match('/^[0-9]+\\./', $words[1]);
            if (in_array($words[1], $indentationStarters) === true) {
              if ($spaceCount !== $prevSpaceCount + 2) {
                $error = 'Comment indentation error after %s element, expected %s spaces';
                $fix = $phpcsFile
                  ->addFixableError($error, $lastCommentToken, 'SpacingBefore', [
                  $words[1],
                  $prevSpaceCount + 2,
                ]);
                if ($fix === true) {
                  $newComment = '//' . str_repeat(' ', $prevSpaceCount + 2) . ltrim($tokens[$lastCommentToken]['content'], "/\t ");
                  $phpcsFile->fixer
                    ->replaceToken($lastCommentToken, $newComment);
                }
              }
            }
            else {
              if ($numberedList === true) {
                $expectedSpaceCount = $prevSpaceCount + strlen($words[1]) + 1;
                if ($spaceCount !== $expectedSpaceCount) {
                  $error = 'Comment indentation error, expected %s spaces';
                  $fix = $phpcsFile
                    ->addFixableError($error, $lastCommentToken, 'SpacingBefore', [
                    $expectedSpaceCount,
                  ]);
                  if ($fix === true) {
                    $newComment = '//' . str_repeat(' ', $expectedSpaceCount) . ltrim($tokens[$lastCommentToken]['content'], "/\t ");
                    $phpcsFile->fixer
                      ->replaceToken($lastCommentToken, $newComment);
                  }
                }
              }
              else {
                $error = 'Comment indentation error, expected only %s spaces';
                $phpcsFile
                  ->addError($error, $lastCommentToken, 'SpacingBefore', [
                  $prevSpaceCount,
                ]);
              }
            }

            //end if
          }

          //end if
        }
        else {
          $error = '%s spaces found before inline comment; expected "// %s" but found "%s"';
          $data = [
            $spaceCount,
            substr($comment, 2 + $spaceCount),
            $comment,
          ];
          $fix = $phpcsFile
            ->addFixableError($error, $lastCommentToken, 'SpacingBefore', $data);
          if ($fix === true) {
            $phpcsFile->fixer
              ->replaceToken($lastCommentToken, '// ' . substr($comment, 2 + $spaceCount) . $phpcsFile->eolChar);
          }
        }

        //end if
      }

      //end if
      $commentText .= trim(substr($tokens[$lastCommentToken]['content'], 2));
    }

    //end foreach
    if ($commentText === '') {
      $error = 'Blank comments are not allowed';
      $fix = $phpcsFile
        ->addFixableError($error, $stackPtr, 'Empty');
      if ($fix === true) {
        $phpcsFile->fixer
          ->replaceToken($stackPtr, '');
      }
      return $lastCommentToken + 1;
    }
    $words = preg_split('/\\s+/', $commentText);
    if (preg_match('/^\\p{Ll}/u', $commentText) === 1) {

      // Allow special lower cased words that contain non-alpha characters
      // (function references, machine names with underscores etc.).
      $matches = [];
      preg_match('/[a-z]+/', $words[0], $matches);
      if (isset($matches[0]) === true && $matches[0] === $words[0]) {
        $error = 'Inline comments must start with a capital letter';
        $fix = $phpcsFile
          ->addFixableError($error, $stackPtr, 'NotCapital');
        if ($fix === true) {
          $newComment = preg_replace("/{$words[0]}/", ucfirst($words[0]), $tokens[$stackPtr]['content'], 1);
          $phpcsFile->fixer
            ->replaceToken($stackPtr, $newComment);
        }
      }
    }

    // Only check the end of comment character if the start of the comment
    // is a letter, indicating that the comment is just standard text.
    if (preg_match('/^\\p{L}/u', $commentText) === 1) {
      $commentCloser = $commentText[strlen($commentText) - 1];
      $acceptedClosers = [
        'full-stops' => '.',
        'exclamation marks' => '!',
        'question marks' => '?',
        'colons' => ':',
        'or closing parentheses' => ')',
      ];

      // Allow special last words like URLs or function references
      // without punctuation.
      $lastWord = $words[count($words) - 1];
      $matches = [];
      preg_match('/https?:\\/\\/.+/', $lastWord, $matches);
      $isUrl = isset($matches[0]) === true;
      preg_match('/[$a-zA-Z_]+\\([$a-zA-Z_]*\\)/', $lastWord, $matches);
      $isFunction = isset($matches[0]) === true;

      // Also allow closing tags like @endlink or @endcode.
      $isEndTag = $lastWord[0] === '@';
      if (in_array($commentCloser, $acceptedClosers, true) === false && $isUrl === false && $isFunction === false && $isEndTag === false) {
        $error = 'Inline comments must end in %s';
        $ender = '';
        foreach ($acceptedClosers as $closerName => $symbol) {
          $ender .= ' ' . $closerName . ',';
        }
        $ender = trim($ender, ' ,');
        $data = [
          $ender,
        ];
        $fix = $phpcsFile
          ->addFixableError($error, $lastCommentToken, 'InvalidEndChar', $data);
        if ($fix === true) {
          $newContent = preg_replace('/(\\s+)$/', '.$1', $tokens[$lastCommentToken]['content']);
          $phpcsFile->fixer
            ->replaceToken($lastCommentToken, $newContent);
        }
      }
    }

    //end if

    // Finally, the line below the last comment cannot be empty if this inline
    // comment is on a line by itself.
    if ($tokens[$previousContent]['line'] < $tokens[$stackPtr]['line']) {
      $next = $phpcsFile
        ->findNext(T_WHITESPACE, $lastCommentToken + 1, null, true);
      if ($next === false) {

        // Ignore if the comment is the last non-whitespace token in a file.
        return $lastCommentToken + 1;
      }
      if ($tokens[$next]['code'] === T_DOC_COMMENT_OPEN_TAG) {

        // If this inline comment is followed by a docblock,
        // ignore spacing as docblock/function etc spacing rules
        // are likely to conflict with our rules.
        return $lastCommentToken + 1;
      }
      $errorCode = 'SpacingAfter';
      if (isset($tokens[$stackPtr]['conditions']) === true) {
        $conditions = $tokens[$stackPtr]['conditions'];
        $type = end($conditions);
        $conditionPtr = key($conditions);
        if (($type === T_FUNCTION || $type === T_CLOSURE) && $tokens[$conditionPtr]['scope_closer'] === $next) {
          $errorCode = 'SpacingAfterAtFunctionEnd';
        }
      }
      for ($i = $lastCommentToken + 1; $i < $phpcsFile->numTokens; $i++) {
        if ($tokens[$i]['line'] === $tokens[$lastCommentToken]['line'] + 1) {
          if ($tokens[$i]['code'] !== T_WHITESPACE) {
            return $lastCommentToken + 1;
          }
        }
        else {
          if ($tokens[$i]['line'] > $tokens[$lastCommentToken]['line'] + 1) {
            break;
          }
        }
      }
      $error = 'There must be no blank line following an inline comment';
      $fix = $phpcsFile
        ->addFixableWarning($error, $lastCommentToken, $errorCode);
      if ($fix === true) {
        $phpcsFile->fixer
          ->beginChangeset();
        for ($i = $lastCommentToken + 1; $i < $next; $i++) {
          if ($tokens[$i]['line'] === $tokens[$next]['line']) {
            break;
          }
          $phpcsFile->fixer
            ->replaceToken($i, '');
        }
        $phpcsFile->fixer
          ->endChangeset();
      }
    }

    //end if
    return $lastCommentToken + 1;
  }

  //end process()

  /**
   * Determines if a comment line is part of an @code/@endcode example.
   *
   * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned.
   * @param int                         $stackPtr  The position of the current token
   *                                               in the stack passed in $tokens.
   *
   * @return boolean Returns true if the comment line is within a @code block,
   *                 false otherwise.
   */
  protected function isInCodeExample(File $phpcsFile, $stackPtr) {
    $tokens = $phpcsFile
      ->getTokens();
    if ($tokens[$stackPtr]['content'] === '// @code' . $phpcsFile->eolChar) {
      return true;
    }
    $prevComment = $stackPtr;
    $lastComment = $stackPtr;
    while (($prevComment = $phpcsFile
      ->findPrevious([
      T_COMMENT,
    ], $lastComment - 1, null, false)) !== false) {
      if ($tokens[$prevComment]['line'] !== $tokens[$lastComment]['line'] - 1) {
        return false;
      }
      if ($tokens[$prevComment]['content'] === '// @code' . $phpcsFile->eolChar) {
        return true;
      }
      if ($tokens[$prevComment]['content'] === '// @endcode' . $phpcsFile->eolChar) {
        return false;
      }
      $lastComment = $prevComment;
    }
    return false;
  }

}

//end class

Classes

Name	Description
InlineCommentSniff	\Drupal\Sniffs\Commenting\InlineCommentSniff.