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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\Console\Language; |
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use Railt\Io\Readable; |
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use Railt\Lexer\Factory; |
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use Railt\Lexer\LexerInterface; |
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use Railt\Lexer\Result\Eoi; |
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/** |
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* Class Language |
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*/ |
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abstract class Language implements LanguageInterface |
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{ |
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/** |
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* @var string[] |
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*/ |
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public const DEFAULT_COLORS = [ |
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'T_COMMENT' => 'fg=cyan', |
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'T_KEYWORD' => 'fg=magenta', |
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'T_STRING' => 'fg=green', |
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'T_DIGIT' => 'fg=green', |
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'T_VARIABLE' => 'fg=yellow', |
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]; |
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/** |
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* @var string[] |
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*/ |
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public const DEFAULT_TOKENS = [ |
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'T_WHITESPACE' => '\s+', |
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]; |
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/** |
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* @var LexerInterface |
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*/ |
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private $lexer; |
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/** |
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* @var array |
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*/ |
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private $colors; |
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/** |
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* Language constructor. |
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* @throws \InvalidArgumentException |
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* @throws \Railt\Lexer\Exception\BadLexemeException |
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*/ |
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public function __construct() |
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{ |
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$this->lexer = Factory::create(\array_merge(self::DEFAULT_TOKENS, $this->tokens()), [Eoi::T_NAME]); |
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$this->colors = \array_merge(self::DEFAULT_COLORS, $this->colors()); |
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} |
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/** |
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* @return array|string[] |
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*/ |
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abstract public function tokens(): array; |
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/** |
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* @return array|string[] |
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*/ |
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abstract public function colors(): array; |
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/** |
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* @param Readable $file |
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* @param array $extensions |
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* @return bool |
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*/ |
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protected function matchExtension(Readable $file, array $extensions): bool |
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{ |
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$ext = \mb_strtolower(\pathinfo($file->getPathname(), \PATHINFO_EXTENSION)); |
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return \in_array($ext, $extensions, true); |
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} |
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/** |
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* @param Readable $file |
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* @return iterable |
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*/ |
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public function lex(Readable $file): iterable |
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{ |
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return $this->lexer->lex($file); |
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} |
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/** |
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* @param string $token |
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* @param string $content |
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* @return string |
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*/ |
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public function highlight(string $token, string $content): string |
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{ |
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$color = $this->colors[$token] ?? null; |
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$content = \str_replace('\\', "\u{0000}", $content); |
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$content = $color === null ? $content : \sprintf('<%s>%s</>', $color, $content); |
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return $content; |
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} |
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/** |
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* @param array $tokens |
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* @return string |
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*/ |
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protected function oneOf(array $tokens): string |
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{ |
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return \sprintf('(%s)\b', \implode('|', $tokens)); |
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} |
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} |
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railt /
console
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