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psalm/src/Psalm/CodeLocation.php
2021-06-07 22:55:21 -04:00

388 lines
11 KiB
PHP

<?php
namespace Psalm;
use PhpParser;
use Psalm\Internal\Analyzer\CommentAnalyzer;
use function explode;
use function max;
use function mb_strcut;
use function min;
use function preg_match;
use function preg_quote;
use function preg_replace;
use function str_replace;
use function strlen;
use function strpos;
use function strrpos;
use function substr_count;
use function trim;
use const PREG_OFFSET_CAPTURE;
class CodeLocation
{
/** @var string */
public $file_path;
/** @var string */
public $file_name;
/** @var int */
public $raw_line_number;
/** @var int */
private $end_line_number = -1;
/** @var int */
public $raw_file_start;
/** @var int */
public $raw_file_end;
/** @var int */
protected $file_start;
/** @var int */
protected $file_end;
/** @var bool */
protected $single_line;
/** @var int */
protected $preview_start;
/** @var int */
private $preview_end = -1;
/** @var int */
private $selection_start = -1;
/** @var int */
private $selection_end = -1;
/** @var int */
private $column_from = -1;
/** @var int */
private $column_to = -1;
/** @var string */
private $snippet = '';
/** @var null|string */
private $text;
/** @var int|null */
public $docblock_start;
/** @var int|null */
private $docblock_start_line_number;
/** @var int|null */
private $docblock_line_number;
/** @var null|int */
private $regex_type;
/** @var bool */
private $have_recalculated = false;
/** @var null|CodeLocation */
public $previous_location;
public const VAR_TYPE = 0;
public const FUNCTION_RETURN_TYPE = 1;
public const FUNCTION_PARAM_TYPE = 2;
public const FUNCTION_PHPDOC_RETURN_TYPE = 3;
public const FUNCTION_PHPDOC_PARAM_TYPE = 4;
public const FUNCTION_PARAM_VAR = 5;
public const CATCH_VAR = 6;
public const FUNCTION_PHPDOC_METHOD = 7;
public function __construct(
FileSource $file_source,
PhpParser\Node $stmt,
?CodeLocation $previous_location = null,
bool $single_line = false,
?int $regex_type = null,
?string $selected_text = null
) {
$this->file_start = (int)$stmt->getAttribute('startFilePos');
$this->file_end = (int)$stmt->getAttribute('endFilePos');
$this->raw_file_start = $this->file_start;
$this->raw_file_end = $this->file_end;
$this->file_path = $file_source->getFilePath();
$this->file_name = $file_source->getFileName();
$this->single_line = $single_line;
$this->regex_type = $regex_type;
$this->previous_location = $previous_location;
$this->text = $selected_text;
$doc_comment = $stmt->getDocComment();
$this->docblock_start = $doc_comment ? $doc_comment->getStartFilePos() : null;
$this->docblock_start_line_number = $doc_comment ? $doc_comment->getStartLine() : null;
$this->preview_start = $this->docblock_start ?: $this->file_start;
$this->raw_line_number = $stmt->getLine();
}
public function setCommentLine(int $line): void
{
$this->docblock_line_number = $line;
}
/**
* @psalm-suppress MixedArrayAccess
*/
private function calculateRealLocation(): void
{
if ($this->have_recalculated) {
return;
}
$this->have_recalculated = true;
$this->selection_start = $this->file_start;
$this->selection_end = $this->file_end + 1;
$project_analyzer = Internal\Analyzer\ProjectAnalyzer::getInstance();
$codebase = $project_analyzer->getCodebase();
$file_contents = $codebase->getFileContents($this->file_path);
$file_length = strlen($file_contents);
$search_limit = $this->single_line ? $this->selection_start : $this->selection_end;
if ($search_limit <= $file_length) {
$preview_end = strpos(
$file_contents,
"\n",
$search_limit
);
} else {
$preview_end = false;
}
// if the string didn't contain a newline
if ($preview_end === false) {
$preview_end = $this->selection_end;
}
$this->preview_end = $preview_end;
if ($this->docblock_line_number &&
$this->docblock_start_line_number &&
$this->preview_start < $this->selection_start
) {
$preview_lines = explode(
"\n",
mb_strcut(
$file_contents,
$this->preview_start,
$this->selection_start - $this->preview_start - 1
)
);
$preview_offset = 0;
$comment_line_offset = $this->docblock_line_number - $this->docblock_start_line_number;
for ($i = 0; $i < $comment_line_offset; ++$i) {
$preview_offset += strlen($preview_lines[$i]) + 1;
}
if (!isset($preview_lines[$i])) {
throw new \Exception('Should have offset');
}
$key_line = $preview_lines[$i];
$indentation = (int)strpos($key_line, '@');
$key_line = trim(preg_replace('@\**/\s*@', '', mb_strcut($key_line, $indentation)));
$this->selection_start = $preview_offset + $indentation + $this->preview_start;
$this->selection_end = $this->selection_start + strlen($key_line);
}
if ($this->regex_type !== null) {
switch ($this->regex_type) {
case self::VAR_TYPE:
$regex = '/@(psalm-)?var[ \t]+' . CommentAnalyzer::TYPE_REGEX . '/';
$match_offset = 2;
break;
case self::FUNCTION_RETURN_TYPE:
$regex = '/\\:\s+(\\??\s*[A-Za-z0-9_\\\\\[\]]+)/';
$match_offset = 1;
break;
case self::FUNCTION_PARAM_TYPE:
$regex = '/^(\\??\s*[A-Za-z0-9_\\\\\[\]]+)\s/';
$match_offset = 1;
break;
case self::FUNCTION_PHPDOC_RETURN_TYPE:
$regex = '/@(psalm-)?return[ \t]+' . CommentAnalyzer::TYPE_REGEX . '/';
$match_offset = 2;
break;
case self::FUNCTION_PHPDOC_METHOD:
$regex = '/@(psalm-)method[ \t]+.*/';
$match_offset = 2;
break;
case self::FUNCTION_PHPDOC_PARAM_TYPE:
$regex = '/@(psalm-)?param[ \t]+' . CommentAnalyzer::TYPE_REGEX . '/';
$match_offset = 2;
break;
case self::FUNCTION_PARAM_VAR:
$regex = '/(\$[^ ]*)/';
$match_offset = 1;
break;
case self::CATCH_VAR:
$regex = '/(\$[^ ^\)]*)/';
$match_offset = 1;
break;
default:
throw new \UnexpectedValueException('Unrecognised regex type ' . $this->regex_type);
}
$preview_snippet = mb_strcut(
$file_contents,
$this->selection_start,
$this->selection_end - $this->selection_start
);
if ($this->text) {
$regex = '/(' . str_replace(',', ',[ ]*', preg_quote($this->text, '/')) . ')/';
$match_offset = 1;
}
if (preg_match($regex, $preview_snippet, $matches, PREG_OFFSET_CAPTURE)) {
$this->selection_start = $this->selection_start + (int)$matches[$match_offset][1];
$this->selection_end = $this->selection_start + strlen((string)$matches[$match_offset][0]);
}
}
// reset preview start to beginning of line
$this->preview_start = (int)strrpos(
$file_contents,
"\n",
min($this->preview_start, $this->selection_start) - strlen($file_contents)
) + 1;
$this->selection_start = max($this->preview_start, $this->selection_start);
$this->selection_end = min($this->preview_end, $this->selection_end);
if ($this->preview_end - $this->selection_end > 200) {
$this->preview_end = (int)strrpos(
$file_contents,
"\n",
$this->selection_end + 200 - strlen($file_contents)
);
// if the line is over 200 characters long
if ($this->preview_end < $this->selection_end) {
$this->preview_end = $this->selection_end + 50;
}
}
$this->snippet = mb_strcut($file_contents, $this->preview_start, $this->preview_end - $this->preview_start);
$this->text = mb_strcut($file_contents, $this->selection_start, $this->selection_end - $this->selection_start);
// reset preview start to beginning of line
$this->column_from = $this->selection_start -
(int)strrpos($file_contents, "\n", $this->selection_start - strlen($file_contents));
$newlines = substr_count($this->text, "\n");
if ($newlines) {
$last_newline_pos = strrpos($file_contents, "\n", $this->selection_end - strlen($file_contents) - 1);
$this->column_to = $this->selection_end - (int)$last_newline_pos;
} else {
$this->column_to = $this->column_from + strlen($this->text);
}
$this->end_line_number = $this->getLineNumber() + $newlines;
}
public function getLineNumber(): int
{
return $this->docblock_line_number ?: $this->raw_line_number;
}
public function getEndLineNumber(): int
{
$this->calculateRealLocation();
return $this->end_line_number;
}
public function getSnippet(): string
{
$this->calculateRealLocation();
return $this->snippet;
}
public function getSelectedText(): string
{
$this->calculateRealLocation();
return (string)$this->text;
}
public function getColumn(): int
{
$this->calculateRealLocation();
return $this->column_from;
}
public function getEndColumn(): int
{
$this->calculateRealLocation();
return $this->column_to;
}
/**
* @return array{0: int, 1: int}
*/
public function getSelectionBounds(): array
{
$this->calculateRealLocation();
return [$this->selection_start, $this->selection_end];
}
/**
* @return array{0: int, 1: int}
*/
public function getSnippetBounds(): array
{
$this->calculateRealLocation();
return [$this->preview_start, $this->preview_end];
}
public function getHash(): string
{
return $this->file_name . ' ' . $this->raw_file_start . $this->raw_file_end;
}
public function getShortSummary() : string
{
return $this->file_name . ':' . $this->getLineNumber() . ':' . $this->getColumn();
}
}