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56 lines
1.5 KiB
56 lines
1.5 KiB
<?php
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/** @license MIT
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* Copyright 2021 Dustin Wilson et al.
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* See LICENSE file for details */
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declare(strict_types=1);
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namespace MensBeam\Lit\Scope;
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class Filter extends Node {
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protected Group|Path $_child;
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protected int $_prefix;
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const PREFIX_LEFT = 0;
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const PREFIX_RIGHT = 1;
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const PREFIX_BOTH = 2;
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public function __construct(Group|Path $child, string $prefix) {
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$this->_child = $child;
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switch ($prefix) {
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case 'L': $this->_prefix = self::PREFIX_LEFT;
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break;
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case 'R': $this->_prefix = self::PREFIX_RIGHT;
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break;
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case 'B': $this->_prefix = self::PREFIX_BOTH;
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break;
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}
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}
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public function getPrefix(array $scopes): ?int {
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return ($this->matches($scopes)) ? $this->_prefix : null;
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}
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public function matches(array $scopes): bool {
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// TODO: Handle prefixes when matching; AFAIK prefixes only apply when
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// determining when to inject grammars. It appears there's more to it in
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// TextMate's original C++, but it may just be for determining "rank"?
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return $this->_child->matches($scopes);
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}
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public function __toString(): string {
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switch ($this->_prefix) {
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case self::PREFIX_LEFT: $prefix = 'L';
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break;
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case self::PREFIX_RIGHT: $prefix = 'R';
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break;
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case self::PREFIX_BOTH: $prefix = 'B';
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break;
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}
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return "$prefix:{$this->_child}";
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}
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}
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