Commit `45599c2892`

45599c2892a2d788e3876d8372c82e2d69db40ba

parent: 2440b74a29

Unsigned

cmc <hello@cleberg.net> · 2026-08-07 07:45 UTC

Add multi-language syntax highlighting (#16)

Splash (Swift-only, since removed) left code rendering unhighlighted
everywhere. Add Highlightr (highlight.js) behind a small SyntaxHighlighter
service and use it on both surfaces:

- Native file viewer: highlight NSAttributedString by language inferred
  from the filename, picking a light/dark theme from the trait style and
  re-highlighting on style changes. Falls back to plain text for unknown
  languages or very large files.
- Markdown/org code blocks in the WKWebView (READMEs, tickets, comments):
  the web view disables JavaScript, so highlight server-side into inline
  color-styled spans. The color scheme is now part of the render/cache
  key since colors are baked into the HTML.

Covered by unit tests for language mapping and highlighted output.

Layout: unified · split

Hutch.xcodeproj/project.pbxproj +17

 		8B2FA9D12F7E211800E609E2 /* paste.json in Resources */ = {isa = PBXBuildFile; fileRef = 8B2FA9C92F7E211800E609E2 /* paste.json */; };
 		8B2FA9D22F7E211800E609E2 /* todo.json in Resources */ = {isa = PBXBuildFile; fileRef = 8B2FA9CA2F7E211800E609E2 /* todo.json */; };
 		8B2FA9D32F7E211800E609E2 /* lists.json in Resources */ = {isa = PBXBuildFile; fileRef = 8B2FA9C72F7E211800E609E2 /* lists.json */; };
+		8BAA000000000000000000B0 /* Highlightr in Frameworks */ = {isa = PBXBuildFile; productRef = 8BAA000000000000000000B2 /* Highlightr */; };
 		8BE082012F80000100000001 /* HutchWidgetExtension.appex in Embed Foundation Extensions */ = {isa = PBXBuildFile; fileRef = 8BE081F62F80000100000001 /* HutchWidgetExtension.appex */; settings = {ATTRIBUTES = (RemoveHeadersOnCopy, ); }; };
 		8BE083012F81000100000001 /* HutchSafariExtension.appex in Embed Foundation Extensions */ = {isa = PBXBuildFile; fileRef = 8BE083032F81000100000001 /* HutchSafariExtension.appex */; settings = {ATTRIBUTES = (RemoveHeadersOnCopy, ); }; };
 		8BF100032F9A000100000001 /* Markdown in Frameworks */ = {isa = PBXBuildFile; productRef = 8BF100022F9A000100000001 /* Markdown */; };
 			buildActionMask = 2147483647;
 			files = (
 				8BF100032F9A000100000001 /* Markdown in Frameworks */,
+				8BAA000000000000000000B0 /* Highlightr in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 			name = Hutch;
 			packageProductDependencies = (
 				8BF100022F9A000100000001 /* Markdown */,
+				8BAA000000000000000000B2 /* Highlightr */,
 			);
 			productName = Hutch;
 			productReference = 8B4B28D12F6704280045FA19 /* Hutch.app */;
 			minimizedProjectReferenceProxies = 1;
 			packageReferences = (
 				8BF100012F9A000100000001 /* XCRemoteSwiftPackageReference "swift-markdown" */,
+				8BAA000000000000000000B3 /* XCRemoteSwiftPackageReference "Highlightr" */,
 			);
 			preferredProjectObjectVersion = 77;
 			productRefGroup = 8B4B28D22F6704280045FA19 /* Products */;
 /* End XCConfigurationList section */
 /* Begin XCRemoteSwiftPackageReference section */
+		8BAA000000000000000000B3 /* XCRemoteSwiftPackageReference "Highlightr" */ = {
+			isa = XCRemoteSwiftPackageReference;
+			repositoryURL = "https://github.com/raspu/Highlightr";
+			requirement = {
+				kind = upToNextMajorVersion;
+				minimumVersion = 2.1.0;
+			};
+		};
 		8BF100012F9A000100000001 /* XCRemoteSwiftPackageReference "swift-markdown" */ = {
 			isa = XCRemoteSwiftPackageReference;
 			repositoryURL = "https://github.com/apple/swift-markdown";
 /* End XCRemoteSwiftPackageReference section */
 /* Begin XCSwiftPackageProductDependency section */
+		8BAA000000000000000000B2 /* Highlightr */ = {
+			isa = XCSwiftPackageProductDependency;
+			package = 8BAA000000000000000000B3 /* XCRemoteSwiftPackageReference "Highlightr" */;
+			productName = Highlightr;
+		};
 		8BF100022F9A000100000001 /* Markdown */ = {
 			isa = XCSwiftPackageProductDependency;
 			package = 8BF100012F9A000100000001 /* XCRemoteSwiftPackageReference "swift-markdown" */;

Hutch.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved +10 −1

	@@ -1,6 +1,15 @@
1	{	1	{
2	"originHash" : "65542d8a5fbbad8dd7d07c8901c1cc48b3aba12cef8da1f062bd28d9b3a6ba50",	2	"originHash" : "4554417ca2693020116bce7cbda415a5e51ada6b4cc4a8b39f7f43a9644bb5e5",
3	"pins" : [	3	"pins" : [
		4	{
		5	"identity" : "highlightr",
		6	"kind" : "remoteSourceControl",
		7	"location" : "https://github.com/raspu/Highlightr",
		8	"state" : {
		9	"revision" : "05e7fcc63b33925cd0c1faaa205cdd5681e7bbef",
		10	"version" : "2.3.0"
		11	}
		12	},
4	{	13	{
5	"identity" : "swift-cmark",	14	"identity" : "swift-cmark",
6	"kind" : "remoteSourceControl",	15	"kind" : "remoteSourceControl",

Hutch/Views/Repositories/FileTreeView.swift +32 −17

     private var wrapLines: Bool
     private var needsLineLayoutUpdate = true
     private var lastMeasuredCodeWidth: CGFloat = 0
+    private var syntaxHighlighter: SyntaxHighlighter?
+    private var syntaxHighlighterTheme: SyntaxHighlightTheme?
     init(text: String, fileName: String, font: UIFont, wrapLines: Bool) {
         self.currentFont = font
         self.wrapLines = wrapLines
         super.init(frame: .zero)
         setupViews()
+        registerForTraitChanges([UITraitUserInterfaceStyle.self]) { (view: CodeFileUIView, _: UITraitCollection) in
+            view.rebuildRows()
+            view.needsLineLayoutUpdate = true
+            view.setNeedsLayout()
+        }
         updateContent(text: text, fileName: fileName, font: font, wrapLines: wrapLines)
     }
         }
         rows.removeAll()
-        let attributedText = CodeSyntaxHighlighter.attributedText(
+        let attributedText = highlightedAttributedText()
-            for: currentText,
-            fileName: currentFileName,
-            font: currentFont
-        )
         let lines = makeLines(from: attributedText, font: currentFont)
         gutterWidthConstraint?.constant = Self.gutterWidth(lineCount: lines.count, font: currentFont)
         }
     }
+    /// Highlighting cap: above this size, skip tokenizing to keep the main
+    /// thread responsive and render plain, label-colored text instead.
+    private static let maxHighlightableLength = 100_000
+    private func highlightedAttributedText() -> NSAttributedString {
+        let plain = NSAttributedString(
+            string: currentText,
+            attributes: [.font: currentFont, .foregroundColor: UIColor.label]
+        )
+        guard currentText.count <= Self.maxHighlightableLength,
+              let language = SyntaxHighlighter.language(forFileName: currentFileName) else {
+            return plain
+        }
+        let theme = SyntaxHighlightTheme(userInterfaceStyle: traitCollection.userInterfaceStyle)
+        if syntaxHighlighterTheme != theme || syntaxHighlighter == nil {
+            syntaxHighlighter = SyntaxHighlighter(theme: theme)
+            syntaxHighlighterTheme = theme
+        }
+        return syntaxHighlighter?.attributedText(for: currentText, language: language, font: currentFont) ?? plain
+    }
     private func makeRow(for line: CodeFileLineData) -> LineRow {
         let row = LineRow()
     let text: NSAttributedString
 }
-private enum CodeSyntaxHighlighter {
-    static func attributedText(for text: String, fileName _: String, font: UIFont) -> NSAttributedString {
-        NSAttributedString(
-            string: text,
-            attributes: [
-                .font: font,
-                .foregroundColor: UIColor.label
-            ]
-        )
-    }
-}
 // MARK: - Tree Entry Row
 private struct TreeEntryRow: View {

Hutch/Views/Repositories/MarkdownHTMLRenderer.swift +16 −3

 nonisolated func markdownToHTML(
     _ text: String,
+    codeTheme: SyntaxHighlightTheme = .light,
     imageURLResolver: ((String) -> String?)? = nil,
     linkURLResolver: ((String) -> String?)? = nil
 ) -> String {
     let document = Document(parsing: text)
-    var renderer = MarkdownHTMLRenderer(imageURLResolver: imageURLResolver, linkURLResolver: linkURLResolver)
+    var renderer = MarkdownHTMLRenderer(
+        imageURLResolver: imageURLResolver,
+        linkURLResolver: linkURLResolver,
+        highlighter: SyntaxHighlighter(theme: codeTheme)
+    )
     return renderer.visit(document)
 }
     nonisolated(unsafe) let imageURLResolver: ((String) -> String?)?
     nonisolated(unsafe) let linkURLResolver: ((String) -> String?)?
+    nonisolated(unsafe) private let highlighter: SyntaxHighlighter
     nonisolated(unsafe) private var isRenderingTableHead = false
     nonisolated(unsafe) private var currentTableAlignments: [Markdown.Table.ColumnAlignment?] = []
     nonisolated(unsafe) private var currentTableColumnIndex = 0
-    nonisolated init(imageURLResolver: ((String) -> String?)?, linkURLResolver: ((String) -> String?)? = nil) {
+    nonisolated init(
+        imageURLResolver: ((String) -> String?)?,
+        linkURLResolver: ((String) -> String?)? = nil,
+        highlighter: SyntaxHighlighter
+    ) {
         self.imageURLResolver = imageURLResolver
         self.linkURLResolver = linkURLResolver
+        self.highlighter = highlighter
     }
     nonisolated mutating func visit(_ markup: Markup) -> String {
         } else {
             classAttribute = ""
         }
-        return "<pre><code\(classAttribute)>\(escapeHTML(codeBlock.code))</code></pre>\n"
+        let inner = highlighter.highlightedHTML(for: codeBlock.code, language: codeBlock.language)
+            ?? escapeHTML(codeBlock.code)
+        return "<pre><code\(classAttribute)>\(inner)</code></pre>\n"
     }
     nonisolated mutating func visitInlineCode(_ inlineCode: InlineCode) -> String {

Hutch/Views/Repositories/ReadmeView.swift +22 −6

     @State private var renderedHTML: String?
     private var cacheKey: String {
+        // Highlighted code colors are baked into the HTML, so the theme is part
+        // of the cache identity — light and dark must not share an entry.
+        let theme = colorScheme == .dark ? "dark" : "light"
         switch content {
         case .html(let html):
-            "html:\(readmePath ?? "custom"):\(html)"
+            return "html:\(readmePath ?? "custom"):\(html)"
         case .markdown(let text):
-            "markdown:\(readmePath ?? ""):\(text)"
+            return "markdown:\(theme):\(readmePath ?? ""):\(text)"
         case .org(let text):
-            "org:\(readmePath ?? ""):\(text)"
+            return "org:\(theme):\(readmePath ?? ""):\(text)"
         case .plainText(let text):
-            "plain:\(readmePath ?? ""):\(text)"
+            return "plain:\(readmePath ?? ""):\(text)"
         }
     }
                 renderedHTML = cached
                 return
             }
+            let theme = SyntaxHighlightTheme(colorScheme: colorScheme)
             let html = await Task.detached(priority: .userInitiated) {
                 markdownToHTML(
                     text,
+                    codeTheme: theme,
                     imageURLResolver: { source in
                         resolveRepositoryAssetURL(
                             source,
                 renderedHTML = cached
                 return
             }
+            let theme = SyntaxHighlightTheme(colorScheme: colorScheme)
             let html = await Task.detached(priority: .userInitiated) {
                 orgToHTML(
                     text,
+                    codeTheme: theme,
                     imageURLResolver: { source in
                         resolveRepositoryAssetURL(
                             source,
 nonisolated func orgToHTML(
     _ text: String,
+    codeTheme: SyntaxHighlightTheme = .light,
     imageURLResolver: ((String) -> String?)? = nil,
     linkURLResolver: ((String) -> String?)? = nil
 ) -> String {
+    let highlighter = SyntaxHighlighter(theme: codeTheme)
     let normalizedText = text
         .replacingOccurrences(of: "\r\n", with: "\n")
         .replacingOccurrences(of: "\r", with: "\n")
     var inQuoteBlock = false
     var inPropertyDrawer = false
     var srcLanguage: String?
+    var srcLines: [String] = []
     var inExampleBlock = false
     var inCenterBlock = false
     var inVerseBlock = false
     }
     func closeSourceBlock() {
-        if srcLanguage != nil {
+        if let language = srcLanguage {
+            let code = srcLines.joined(separator: "\n")
+            if !code.isEmpty {
+                html += (highlighter.highlightedHTML(for: code, language: language) ?? escapeHTML(code)) + "\n"
+            }
             html += "</code></pre>\n"
             srcLanguage = nil
+            srcLines = []
             closePendingBlockWrapper()
         }
     }
             if trimmed.lowercased() == "#+end_src" {
                 closeSourceBlock()
             } else {
-                html += escapeHTML(line) + "\n"
+                srcLines.append(line)
             }
             continue
         }
             let classAttribute = language.map { " class=\"language-\(escapeHTMLAttribute($0))\"" } ?? ""
             html += "<pre><code\(classAttribute)>"
             srcLanguage = language ?? ""
+            srcLines = []
             continue
         }

Hutch/Views/Repositories/SyntaxHighlighter.swift added +222

@@ -0,0 +1,222 @@
	1	import Foundation
	2	import Highlightr
	3	import SwiftUI
	4	import UIKit
	5
	6	enum SyntaxHighlightTheme {
	7	case light
	8	case dark
	9
	10	init(userInterfaceStyle: UIUserInterfaceStyle) {
	11	self = userInterfaceStyle == .dark ? .dark : .light
	12	}
	13
	14	init(colorScheme: ColorScheme) {
	15	self = colorScheme == .dark ? .dark : .light
	16	}
	17
	18	/// highlight.js theme names bundled with Highlightr. Xcode-like in light,
	19	/// a muted dark palette in dark, so highlighting reads as native on both.
	20	var highlightrName: String {
	21	switch self {
	22	case .light: "xcode"
	23	case .dark: "atom-one-dark"
	24	}
	25	}
	26	}
	27
	28	/// Multi-language syntax highlighting backed by Highlightr (highlight.js).
	29	///
	30	/// Highlightr wraps a JavaScriptCore context and is not thread-safe, so each
	31	/// instance must stay on the thread/task that created it. Callers that fail to
	32	/// resolve a language — or hit an unavailable engine — get `nil` and should
	33	/// fall back to plain, escaped text.
	34	final class SyntaxHighlighter {
	35	private let highlightr: Highlightr?
	36	private let supportedLanguages: Set<String>
	37
	38	init(theme: SyntaxHighlightTheme) {
	39	let engine = Highlightr()
	40	engine?.setTheme(to: theme.highlightrName)
	41	highlightr = engine
	42	supportedLanguages = Set(engine?.supportedLanguages() ?? [])
	43	}
	44
	45	/// Full-document highlighted string, or `nil` when the language is unknown
	46	/// or the engine is unavailable.
	47	func attributedText(for code: String, language: String?, font: UIFont) -> NSAttributedString? {
	48	guard let highlightr, let language = resolvedLanguage(language) else { return nil }
	49	highlightr.theme.setCodeFont(font)
	50	return highlightr.highlight(code, as: language, fastRender: true)
	51	}
	52
	53	/// Inner HTML for a `<code>` element — color-styled `<span>`s — or `nil` to
	54	/// fall back. Colors are inlined, so the caller must regenerate when the
	55	/// theme changes.
	56	func highlightedHTML(for code: String, language: String?) -> String? {
	57	guard let attributed = attributedText(for: code, language: language, font: Self.htmlMeasurementFont) else {
	58	return nil
	59	}
	60	return Self.html(from: attributed)
	61	}
	62
	63	private static let htmlMeasurementFont = UIFont.monospacedSystemFont(ofSize: 12, weight: .regular)
	64
	65	private func resolvedLanguage(_ raw: String?) -> String? {
	66	guard let trimmed = raw?.trimmingCharacters(in: .whitespacesAndNewlines).lowercased(),
	67	!trimmed.isEmpty else {
	68	return nil
	69	}
	70	let mapped = Self.languageAliases[trimmed] ?? trimmed
	71	return supportedLanguages.contains(mapped) ? mapped : nil
	72	}
	73
	74	/// Resolves a filename to a highlight.js language identifier, or `nil` when
	75	/// there is no confident match (so we render plain rather than mis-highlight).
	76	static func language(forFileName fileName: String) -> String? {
	77	let base = (fileName as NSString).lastPathComponent.lowercased()
	78	if let byName = fileNameLanguages[base] {
	79	return byName
	80	}
	81	let ext = (fileName as NSString).pathExtension.lowercased()
	82	guard !ext.isEmpty else { return nil }
	83	return extensionLanguages[ext]
	84	}
	85
	86	private static func html(from attributed: NSAttributedString) -> String {
	87	var html = ""
	88	let range = NSRange(location: 0, length: attributed.length)
	89	attributed.enumerateAttribute(.foregroundColor, in: range, options: []) { value, subrange, _ in
	90	let fragment = (attributed.string as NSString).substring(with: subrange)
	91	let escaped = escapeHTML(fragment)
	92	if let color = value as? UIColor, let hex = color.hexRGBString {
	93	html += "<span style=\"color:\(hex)\">\(escaped)</span>"
	94	} else {
	95	html += escaped
	96	}
	97	}
	98	return html
	99	}
	100
	101	/// Fence tags / short names that differ from highlight.js identifiers.
	102	private static let languageAliases: [String: String] = [
	103	"js": "javascript",
	104	"jsx": "javascript",
	105	"ts": "typescript",
	106	"tsx": "typescript",
	107	"py": "python",
	108	"rb": "ruby",
	109	"sh": "bash",
	110	"shell": "bash",
	111	"zsh": "bash",
	112	"yml": "yaml",
	113	"c++": "cpp",
	114	"cc": "cpp",
	115	"h": "cpp",
	116	"hpp": "cpp",
	117	"cs": "csharp",
	118	"objc": "objectivec",
	119	"objective-c": "objectivec",
	120	"obj-c": "objectivec",
	121	"html": "xml",
	122	"htm": "xml",
	123	"kt": "kotlin",
	124	"rs": "rust",
	125	"golang": "go",
	126	"md": "markdown",
	127	"ps1": "powershell",
	128	"yaml": "yaml"
	129	]
	130
	131	/// Filenames without a useful extension.
	132	private static let fileNameLanguages: [String: String] = [
	133	"dockerfile": "dockerfile",
	134	"makefile": "makefile",
	135	"gnumakefile": "makefile",
	136	"cmakelists.txt": "cmake",
	137	"gemfile": "ruby",
	138	"rakefile": "ruby",
	139	"podfile": "ruby",
	140	"package.swift": "swift"
	141	]
	142
	143	private static let extensionLanguages: [String: String] = [
	144	"swift": "swift",
	145	"js": "javascript",
	146	"mjs": "javascript",
	147	"cjs": "javascript",
	148	"jsx": "javascript",
	149	"ts": "typescript",
	150	"tsx": "typescript",
	151	"py": "python",
	152	"rb": "ruby",
	153	"go": "go",
	154	"rs": "rust",
	155	"c": "c",
	156	"h": "c",
	157	"cpp": "cpp",
	158	"cxx": "cpp",
	159	"cc": "cpp",
	160	"hpp": "cpp",
	161	"hxx": "cpp",
	162	"m": "objectivec",
	163	"mm": "objectivec",
	164	"cs": "csharp",
	165	"java": "java",
	166	"kt": "kotlin",
	167	"kts": "kotlin",
	168	"scala": "scala",
	169	"php": "php",
	170	"pl": "perl",
	171	"pm": "perl",
	172	"lua": "lua",
	173	"r": "r",
	174	"dart": "dart",
	175	"groovy": "groovy",
	176	"hs": "haskell",
	177	"ex": "elixir",
	178	"exs": "elixir",
	179	"erl": "erlang",
	180	"clj": "clojure",
	181	"sh": "bash",
	182	"bash": "bash",
	183	"zsh": "bash",
	184	"fish": "bash",
	185	"ps1": "powershell",
	186	"json": "json",
	187	"yaml": "yaml",
	188	"yml": "yaml",
	189	"toml": "ini",
	190	"ini": "ini",
	191	"cfg": "ini",
	192	"conf": "ini",
	193	"xml": "xml",
	194	"html": "xml",
	195	"htm": "xml",
	196	"css": "css",
	197	"scss": "scss",
	198	"sass": "scss",
	199	"less": "less",
	200	"sql": "sql",
	201	"md": "markdown",
	202	"markdown": "markdown",
	203	"diff": "diff",
	204	"patch": "diff",
	205	"cmake": "cmake",
	206	"gradle": "groovy",
	207	"vim": "vim"
	208	]
	209	}
	210
	211	private extension UIColor {
	212	/// `#rrggbb` for HTML inline styles, or `nil` if the color isn't RGB-convertible.
	213	var hexRGBString: String? {
	214	var red: CGFloat = 0
	215	var green: CGFloat = 0
	216	var blue: CGFloat = 0
	217	var alpha: CGFloat = 0
	218	guard getRed(&red, green: &green, blue: &blue, alpha: &alpha) else { return nil }
	219	let clamp: (CGFloat) -> Int = { Int((max(0, min(1, $0)) * 255).rounded()) }
	220	return String(format: "#%02x%02x%02x", clamp(red), clamp(green), clamp(blue))
	221	}
	222	}

Hutch/Views/Tickets/TicketDetailView.swift +10 −2

                     .frame(minHeight: 80)
             }
         }
-        .task(id: markdown) {
+        .task(id: MarkdownRenderKey(markdown: markdown, isDark: colorScheme == .dark)) {
+            let theme = SyntaxHighlightTheme(colorScheme: colorScheme)
             let html = await Task.detached(priority: .userInitiated) {
-                markdownToHTML(markdown)
+                markdownToHTML(markdown, codeTheme: theme)
             }.value
             guard !Task.isCancelled else { return }
             renderedHTML = html
         }
     }
+    /// Re-renders when the markdown or the color scheme changes; highlighted
+    /// code colors are baked into the HTML, so both must key the render.
+    private struct MarkdownRenderKey: Equatable {
+        let markdown: String
+        let isDark: Bool
+    }
 }
 // MARK: - Event Row

HutchTests/SyntaxHighlighterTests.swift added +48

@@ -0,0 +1,48 @@
	1	import Foundation
	2	import Testing
	3	import UIKit
	4	@testable import Hutch
	5
	6	struct SyntaxHighlighterTests {
	7	@Test
	8	func mapsFileNamesToLanguages() {
	9	#expect(SyntaxHighlighter.language(forFileName: "Sources/App/Main.swift") == "swift")
	10	#expect(SyntaxHighlighter.language(forFileName: "server.py") == "python")
	11	#expect(SyntaxHighlighter.language(forFileName: "index.tsx") == "typescript")
	12	#expect(SyntaxHighlighter.language(forFileName: "Dockerfile") == "dockerfile")
	13	#expect(SyntaxHighlighter.language(forFileName: "Makefile") == "makefile")
	14	}
	15
	16	@Test
	17	func returnsNilForUnknownExtensions() {
	18	#expect(SyntaxHighlighter.language(forFileName: "notes.unknownext") == nil)
	19	#expect(SyntaxHighlighter.language(forFileName: "LICENSE") == nil)
	20	}
	21
	22	@Test
	23	func highlightsKnownLanguageAsColoredSpans() {
	24	let highlighter = SyntaxHighlighter(theme: .light)
	25	let html = highlighter.highlightedHTML(for: "let answer = 42", language: "swift")
	26
	27	let unwrapped = try? #require(html)
	28	#expect(unwrapped?.contains("<span style=\"color:") == true)
	29	#expect(unwrapped?.contains("answer") == true)
	30	}
	31
	32	@Test
	33	func fallsBackToNilForUnsupportedLanguage() {
	34	let highlighter = SyntaxHighlighter(theme: .dark)
	35	#expect(highlighter.highlightedHTML(for: "plain text", language: nil) == nil)
	36	#expect(highlighter.highlightedHTML(for: "plain text", language: "totally-not-a-language") == nil)
	37	}
	38
	39	@Test
	40	func producesAttributedTextForNativeViewer() {
	41	let highlighter = SyntaxHighlighter(theme: .light)
	42	let font = UIFont.monospacedSystemFont(ofSize: 12, weight: .regular)
	43	let attributed = highlighter.attributedText(for: "print(\"hi\")", language: "python", font: font)
	44
	45	let unwrapped = try? #require(attributed)
	46	#expect(unwrapped?.string.contains("print") == true)
	47	}
	48	}

Commit 45599c2892

Commit `45599c2892`