Ole André Vadla Ravnåsandtrufae
2e00198952
Port the mai-ios block parser into LumaCore; render headings, lists, tables, task lists, blockquotes, code blocks and footnotes across the SwiftUI and GTK frontends. Parse inline spans and rewrite LaTeX to Unicode in LumaCore so both frontends share one parser. Highlight code through StyledText. Drop the inline-only AttributedString path. Co-authored-by: trufae <[email protected]>
46 lines
1.9 KiB
Swift
46 lines
1.9 KiB
Swift
import Foundation
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public enum CodeHighlighter {
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public static func highlight(_ code: String, language: String) -> StyledText {
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var spans: [StyledText.Span] = []
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var token = ""
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func flushToken() {
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guard !token.isEmpty else { return }
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spans.append(StyledText.Span(text: token, foreground: color(for: token)))
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token.removeAll(keepingCapacity: true)
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}
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for character in code {
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if character.isLetter || character.isNumber || character == "_" {
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token.append(character)
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} else {
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flushToken()
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spans.append(StyledText.Span(text: String(character), foreground: punctuationColor))
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}
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}
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flushToken()
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return StyledText(spans: spans)
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}
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private static func color(for token: String) -> RGBColor {
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if keywords.contains(token) { return keywordColor }
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if token.allSatisfy(\.isNumber) { return numberColor }
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return identifierColor
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}
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private static let keywordColor = RGBColor(r: 198, g: 120, b: 221)
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private static let numberColor = RGBColor(r: 209, g: 154, b: 102)
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private static let identifierColor = RGBColor(r: 171, g: 178, b: 191)
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private static let punctuationColor = RGBColor(r: 130, g: 137, b: 151)
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private static let keywords: Set<String> = [
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"actor", "as", "async", "await", "break", "case", "catch", "class", "const",
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"continue", "default", "defer", "do", "else", "enum", "export", "extends",
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"extension", "false", "final", "for", "func", "function", "guard", "if",
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"import", "in", "interface", "let", "new", "nil", "null", "private", "protocol",
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"public", "return", "self", "static", "struct", "super", "switch", "this",
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"throw", "throws", "true", "try", "type", "typeof", "var", "void", "while", "yield",
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]
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}
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