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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 SyntaxTree {
9 public final class Cursor {
10 public let lineMap: LineMap
11 public let node: SyntaxTree.Child
12 public let utf16Offset: Int
13
14 public private(set) lazy var children: [Cursor] = {
15 var children: [Cursor] = []
16 var utf16Offset = utf16Offset
17 for childNode in node.children {
18 children.append(Self(lineMap: lineMap, node: childNode, utf16Offset: utf16Offset))
19 utf16Offset += childNode.utf16Length
20 }
21
22 return children
23 }()
24
25 public var utf16Range: Range<Int> {
26 utf16Offset..<utf16Offset + node.utf16Length
27 }
28
29 init(lineMap: LineMap, node: SyntaxTree.Child, utf16Offset: Int) {
30 self.lineMap = lineMap
31 self.node = node
32 self.utf16Offset = utf16Offset
33 }
34 }
35}
36
37extension SyntaxTree.Cursor {
38 public func firstChild<T>(mapping: (SyntaxTree.Cursor) -> T?) -> T? {
39 for child in children {
40 if let result = mapping(child) {
41 return result
42 } else {
43 continue
44 }
45 }
46 return nil
47 }
48
49 public func children<T>(mapping: (SyntaxTree.Cursor) -> T?) -> [T] {
50 children.compactMap(mapping)
51 }
52}
53