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1// SPDX-FileCopyrightText: 2025 The Project Pterodactyl Developers
2//
3// SPDX-License-Identifier: MPL-2.0
4
5import Foundation
6import LanguageServerProtocol
7
8extension SemanticTokenTypes {
9 public var index: Int {
10 Self.allCases.firstIndex(of: self)!
11 }
12}
13
14extension SemanticTokenModifiers {
15 private static let modifierBitPositions: [SemanticTokenModifiers: Int] = {
16 var dict: [SemanticTokenModifiers: Int] = [:]
17 for (i, modifier) in SemanticTokenModifiers.allCases.enumerated() {
18 dict[modifier] = i
19 }
20 return dict
21 }()
22
23 static func encodeBitset(_ modifiers: Set<SemanticTokenModifiers>) -> UInt32 {
24 var bitset: UInt32 = 0
25 for modifier in modifiers {
26 if let bit = modifierBitPositions[modifier] {
27 bitset |= (1 << bit)
28 }
29 }
30 return bitset
31 }
32}
33
34
35struct SingleLineRange {
36 let line: Int
37 let char: Int
38 let length: Int
39}
40
41
42extension TokenMetadata {
43 func semanticToken(range: SingleLineRange) -> SemanticToken? {
44 guard range.length > 0 else { return nil }
45 return SemanticToken(
46 line: UInt32(range.line),
47 char: UInt32(range.char),
48 length: UInt32(range.length),
49 type: UInt32(semanticTokenType.index),
50 modifiers: SemanticTokenModifiers.encodeBitset(semanticTokenModifiers)
51 )
52 }
53}
54
55extension SyntaxCursor {
56 var singleLineRanges: [SingleLineRange] {
57 var result: [SingleLineRange] = []
58 var location = lineMap.location(at: utf16Offset)
59
60 for line in node.text.split(omittingEmptySubsequences: false, whereSeparator: \.isNewline) {
61 let length = line.utf16.count
62 result.append(SingleLineRange(line: location.line, char: location.column, length: length))
63 location.line += 1
64 location.column = 0
65 }
66
67 return result
68 }
69}
70
71extension SyntaxCursor {
72 public func collectSemanticTokens(_ sink: inout [SemanticToken]) {
73 if let (_, metadata) = node.token, let metadata {
74 for lineRange in singleLineRanges {
75 if let semanticToken = metadata.semanticToken(range: lineRange) {
76 sink.append(semanticToken)
77 }
78 }
79 }
80
81 for child in children {
82 child.collectSemanticTokens(&sink)
83 }
84 }
85
86 public var semanticTokens: [SemanticToken] {
87 var tokens: [SemanticToken] = []
88 collectSemanticTokens(&tokens)
89 return tokens
90 }
91}