<?php declare(strict_types=1);
namespace PhpParser;
class Comment implements \JsonSerializable
{
protected $text;
protected $startLine;
protected $startFilePos;
protected $startTokenPos;
protected $endLine;
protected $endFilePos;
protected $endTokenPos;
/**
* Constructs a comment node.
*
* @param string $text Comment text (including comment delimiters like /*)
* @param int $startLine Line number the comment started on
* @param int $startFilePos File offset the comment started on
* @param int $startTokenPos Token offset the comment started on
*/
public function __construct(
string $text,
int $startLine = -1, int $startFilePos = -1, int $startTokenPos = -1,
int $endLine = -1, int $endFilePos = -1, int $endTokenPos = -1
) {
$this->text = $text;
$this->startLine = $startLine;
$this->startFilePos = $startFilePos;
$this->startTokenPos = $startTokenPos;
$this->endLine = $endLine;
$this->endFilePos = $endFilePos;
$this->endTokenPos = $endTokenPos;
}
/**
* Gets the comment text.
*
* @return string The comment text (including comment delimiters like /*)
*/
public function getText() : string {
return $this->text;
}
/**
* Gets the line number the comment started on.
*
* @return int Line number (or -1 if not available)
*/
public function getStartLine() : int {
return $this->startLine;
}
/**
* Gets the file offset the comment started on.
*
* @return int File offset (or -1 if not available)
*/
public function getStartFilePos() : int {
return $this->startFilePos;
}
/**
* Gets the token offset the comment started on.
*
* @return int Token offset (or -1 if not available)
*/
public function getStartTokenPos() : int {
return $this->startTokenPos;
}
/**
* Gets the line number the comment ends on.
*
* @return int Line number (or -1 if not available)
*/
public function getEndLine() : int {
return $this->endLine;
}
/**
* Gets the file offset the comment ends on.
*
* @return int File offset (or -1 if not available)
*/
public function getEndFilePos() : int {
return $this->endFilePos;
}
/**
* Gets the token offset the comment ends on.
*
* @return int Token offset (or -1 if not available)
*/
public function getEndTokenPos() : int {
return $this->endTokenPos;
}
/**
* Gets the line number the comment started on.
*
* @deprecated Use getStartLine() instead
*
* @return int Line number
*/
public function getLine() : int {
return $this->startLine;
}
/**
* Gets the file offset the comment started on.
*
* @deprecated Use getStartFilePos() instead
*
* @return int File offset
*/
public function getFilePos() : int {
return $this->startFilePos;
}
/**
* Gets the token offset the comment started on.
*
* @deprecated Use getStartTokenPos() instead
*
* @return int Token offset
*/
public function getTokenPos() : int {
return $this->startTokenPos;
}
/**
* Gets the comment text.
*
* @return string The comment text (including comment delimiters like /*)
*/
public function __toString() : string {
return $this->text;
}
/**
* Gets the reformatted comment text.
*
* "Reformatted" here means that we try to clean up the whitespace at the
* starts of the lines. This is necessary because we receive the comments
* without trailing whitespace on the first line, but with trailing whitespace
* on all subsequent lines.
*
* @return mixed|string
*/
public function getReformattedText() {
$text = trim($this->text);
$newlinePos = strpos($text, "\n");
if (false === $newlinePos) {
// Single line comments don't need further processing
return $text;
} elseif (preg_match('((*BSR_ANYCRLF)(*ANYCRLF)^.*(?:\R\s+\*.*)+$)', $text)) {
// Multi line comment of the type
//
// /*
// * Some text.
// * Some more text.
// */
//
// is handled by replacing the whitespace sequences before the * by a single space
return preg_replace('(^\s+\*)m', ' *', $this->text);
} elseif (preg_match('(^/\*\*?\s*[\r\n])', $text) && preg_match('(\n(\s*)\*/$)', $text, $matches)) {
// Multi line comment of the type
//
// /*
// Some text.
// Some more text.
// */
//
// is handled by removing the whitespace sequence on the line before the closing
// */ on all lines. So if the last line is " */", then " " is removed at the
// start of all lines.
return preg_replace('(^' . preg_quote($matches[1]) . ')m', '', $text);
} elseif (preg_match('(^/\*\*?\s*(?!\s))', $text, $matches)) {
// Multi line comment of the type
//
// /* Some text.
// Some more text.
// Indented text.
// Even more text. */
//
// is handled by removing the difference between the shortest whitespace prefix on all
// lines and the length of the "/* " opening sequence.
$prefixLen = $this->getShortestWhitespacePrefixLen(substr($text, $newlinePos + 1));
$removeLen = $prefixLen - strlen($matches[0]);
return preg_replace('(^\s{' . $removeLen . '})m', '', $text);
}
// No idea how to format this comment, so simply return as is
return $text;
}
/**
* Get length of shortest whitespace prefix (at the start of a line).
*
* If there is a line with no prefix whitespace, 0 is a valid return value.
*
* @param string $str String to check
* @return int Length in characters. Tabs count as single characters.
*/
private function getShortestWhitespacePrefixLen(string $str) : int {
$lines = explode("\n", $str);
$shortestPrefixLen = \INF;
foreach ($lines as $line) {
preg_match('(^\s*)', $line, $matches);
$prefixLen = strlen($matches[0]);
if ($prefixLen < $shortestPrefixLen) {
$shortestPrefixLen = $prefixLen;
}
}
return $shortestPrefixLen;
}
/**
* @return array
* @psalm-return array{nodeType:string, text:mixed, line:mixed, filePos:mixed}
*/
public function jsonSerialize() : array {
// Technically not a node, but we make it look like one anyway
$type = $this instanceof Comment\Doc ? 'Comment_Doc' : 'Comment';
return [
'nodeType' => $type,
'text' => $this->text,
// TODO: Rename these to include "start".
'line' => $this->startLine,
'filePos' => $this->startFilePos,
'tokenPos' => $this->startTokenPos,
'endLine' => $this->endLine,
'endFilePos' => $this->endFilePos,
'endTokenPos' => $this->endTokenPos,
];
}
}