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This is an implementation of LSP's semantic tokens for Swift. Both lexical and semantic tokens are provided by using the syntaxmap and the semantic annotations provided as part of SourceKit's open responses and document update notifications. While lexical tokens are parsed and stored in the DocumentManager synchronously, semantic tokens are provided asynchronously. If an edit occurs, tokens are automatically shifted by the DocumentManager. This is especially relevant for lexical tokens, which are updated in deltas. In addition, unit tests are added that assert that both lexical and semantic tokens are provided and shifted correctly upon edits.
42 lines
1.5 KiB
Swift
42 lines
1.5 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2021 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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import LanguageServerProtocol
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/// Syntax highlighting tokens for a particular document.
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public struct DocumentTokens {
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/// Lexical tokens, e.g. keywords, raw identifiers, ...
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public var lexical: [SyntaxHighlightingToken] = []
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/// Semantic tokens, e.g. variable references, type references, ...
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public var semantic: [SyntaxHighlightingToken] = []
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private var merged: [SyntaxHighlightingToken] {
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lexical.mergingTokens(with: semantic)
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}
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public var mergedAndSorted: [SyntaxHighlightingToken] {
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merged.sorted { $0.start < $1.start }
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}
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/// Modifies the syntax highlighting tokens of each kind
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/// (lexical and semantic) according to `action`.
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public mutating func withMutableTokensOfEachKind(_ action: (inout [SyntaxHighlightingToken]) -> Void) {
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action(&lexical)
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action(&semantic)
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}
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// Replace all lexical tokens in `range`.
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public mutating func replaceLexical(in range: Range<Position>, with newTokens: [SyntaxHighlightingToken]) {
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lexical.removeAll { $0.range.overlaps(range) }
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lexical += newTokens
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}
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}
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