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<?php |
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/** |
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* This file is part of Railt package. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Railt\SDL\Highlight; |
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use Phplrt\Contracts\Source\ReadableInterface; |
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use Phplrt\Position\Position; |
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use Phplrt\Position\PositionInterface; |
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/** |
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* Class Highlight |
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*/ |
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final class Highlight implements HighlightInterface |
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{ |
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/** |
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* @var string |
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*/ |
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public string $lineTemplate = ' %s | %s'; |
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/** |
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* @var int |
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*/ |
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public int $lineSize = 5; |
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/** |
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* @var string |
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*/ |
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public string $lineDelimiter = \PHP_EOL; |
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/** |
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* @var string |
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*/ |
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public string $errorHighlight = '^'; |
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/** |
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* @var string |
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*/ |
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public string $eoi = '<EOI>'; |
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/** |
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* @var self|HighlightInterface|null |
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*/ |
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private static ?self $instance = null; |
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/** |
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* @return static |
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*/ |
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public static function getInstance(): self |
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{ |
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return self::$instance ?? self::$instance = new self(); |
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} |
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/** |
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* @param ReadableInterface $file |
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* @param PositionInterface $from |
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* @param PositionInterface $to |
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* @return string |
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*/ |
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public function render(ReadableInterface $file, PositionInterface $from, PositionInterface $to = null): string |
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{ |
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$source = $this->getCodeLine($file, $from); |
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return $this->lines([ |
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$this->line($source, $from->getLine()), |
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$this->error($from->getColumn(), $this->length($source, $from, $to ?? $from)), |
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]); |
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} |
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/** |
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* @param ReadableInterface $file |
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* @param PositionInterface $from |
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* @param int $length |
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* @return string |
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*/ |
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public function renderByLength(ReadableInterface $file, PositionInterface $from, int $length = 1): string |
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{ |
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$to = Position::fromPosition($file, $from->getLine(), $from->getColumn() + $length); |
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return $this->render($file, $from, $to); |
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} |
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/** |
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* @param string $source |
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* @param PositionInterface $from |
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* @param PositionInterface $to |
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* @return int |
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*/ |
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private function length(string $source, PositionInterface $from, PositionInterface $to): int |
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{ |
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$max = \mb_strlen($source) - $from->getColumn(); |
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if ($from->getLine() === $to->getLine()) { |
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return \min($max, $to->getColumn() - $from->getColumn() - 1); |
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} |
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return $max; |
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} |
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/** |
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* @param iterable|string[] $lines |
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* @return string |
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*/ |
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private function lines(iterable $lines): string |
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{ |
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$lines = $lines instanceof \Traversable ? \iterator_to_array($lines) : $lines; |
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return \implode($this->lineDelimiter, $lines); |
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} |
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/** |
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* @param string $text |
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* @param int|null $line |
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* @return string |
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*/ |
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private function line(string $text, ?int $line = null): string |
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{ |
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$prefix = $line === null |
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? \str_repeat(' ', $this->lineSize) |
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: \str_pad($line . '.', $this->lineSize, ' ', \STR_PAD_LEFT); |
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return \sprintf($this->lineTemplate, $prefix, \rtrim($text)); |
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} |
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/** |
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* @param ReadableInterface $file |
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* @param PositionInterface $position |
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* @return string |
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*/ |
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public function getCodeLine(ReadableInterface $file, PositionInterface $position): string |
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{ |
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[$stream, $i, $line] = [$file->getStream(), 0, '']; |
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while (++$i <= $position->getLine() && ! \feof($stream)) { |
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$line = \is_string($current = \fgets($stream)) ? $current : $this->eoi; |
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} |
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return $line; |
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} |
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/** |
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* @param int $offset |
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* @param int $length |
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* @return string |
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*/ |
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private function error(int $offset, int $length): string |
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{ |
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$prefix = \str_repeat(' ', \max($offset - 1, 0)); |
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$highlight = \str_repeat($this->errorHighlight, \max($length, 1)); |
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return $this->line($prefix . $highlight, null); |
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} |
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} |
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railt /
sdl
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