macOS: Refactor syntax highlighting

Signed-off-by: Roopesh Chander <roop@roopc.net>

WireGuard/WireGuard.xcodeproj/project.pbxproj

@@ -140,6 +140,7 @@
 		6FE1765A21C90E87002690EA /* LocalizationHelper.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FE1765921C90E87002690EA /* LocalizationHelper.swift */; };
 		6FE254FB219C10800028284D /* ZipImporter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FE254FA219C10800028284D /* ZipImporter.swift */; };
 		6FE254FF219C60290028284D /* ZipExporter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FE254FE219C60290028284D /* ZipExporter.swift */; };
+		6FE3661D21F64F6B00F78C7D /* ConfTextColorTheme.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FE3661C21F64F6B00F78C7D /* ConfTextColorTheme.swift */; };
 		6FF3527021C240160008484E /* ringlogger.c in Sources */ = {isa = PBXBuildFile; fileRef = 6FF3526C21C23F960008484E /* ringlogger.c */; };
 		6FF3527121C240160008484E /* Logger.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FF3526E21C23FA10008484E /* Logger.swift */; };
 		6FF3527221C2616C0008484E /* ringlogger.c in Sources */ = {isa = PBXBuildFile; fileRef = 6FF3526C21C23F960008484E /* ringlogger.c */; };
@@ -307,6 +308,7 @@
 		6FE1765921C90E87002690EA /* LocalizationHelper.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LocalizationHelper.swift; sourceTree = "<group>"; };
 		6FE254FA219C10800028284D /* ZipImporter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ZipImporter.swift; sourceTree = "<group>"; };
 		6FE254FE219C60290028284D /* ZipExporter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ZipExporter.swift; sourceTree = "<group>"; };
+		6FE3661C21F64F6B00F78C7D /* ConfTextColorTheme.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ConfTextColorTheme.swift; sourceTree = "<group>"; };
 		6FF3526B21C23F960008484E /* ringlogger.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ringlogger.h; sourceTree = "<group>"; };
 		6FF3526C21C23F960008484E /* ringlogger.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = ringlogger.c; sourceTree = "<group>"; };
 		6FF3526E21C23FA10008484E /* Logger.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Logger.swift; sourceTree = "<group>"; };
@@ -394,6 +396,7 @@
 				5F52D0BA21E3781B00283CEA /* ConfTextView.swift */,
 				5F52D0BC21E3785C00283CEA /* ConfTextStorage.swift */,
 				6F9B582721E8CD4300544D02 /* PopupRow.swift */,
+				6FE3661C21F64F6B00F78C7D /* ConfTextColorTheme.swift */,
 			);
 			path = View;
 			sourceTree = "<group>";
@@ -1120,6 +1123,7 @@
 				6FBA103F21D6B6FF0051C35F /* TunnelImporter.swift in Sources */,
 				6F89E17A21EDEB0E00C97BB9 /* StatusItemController.swift in Sources */,
 				6F4DD16B21DA558800690EAE /* TunnelListRow.swift in Sources */,
+				6FE3661D21F64F6B00F78C7D /* ConfTextColorTheme.swift in Sources */,
 				5F52D0BF21E3788900283CEA /* NSColor+Hex.swift in Sources */,
 				6FB1BDBE21D50F0200A991BF /* Logger.swift in Sources */,
 				6FB1BDBF21D50F0200A991BF /* TunnelConfiguration+WgQuickConfig.swift in Sources */,

WireGuard/WireGuard/UI/macOS/View/ConfTextColorTheme.swift

@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2018-2019 WireGuard LLC. All Rights Reserved.
+
+import Cocoa
+
+protocol ConfTextColorTheme {
+    func color(for: highlight_type) -> NSColor
+}
+
+struct ConfTextAquaColorTheme: ConfTextColorTheme {
+    func color(for highlightType: highlight_type) -> NSColor {
+        switch highlightType.rawValue {
+        case HighlightSection.rawValue:
+            return NSColor(hex: "#326D74") // Class name in Xcode
+        case HighlightField.rawValue:
+            return NSColor(hex: "#9B2393") // Keywords in Xcode
+        case HighlightPublicKey.rawValue, HighlightPrivateKey.rawValue, HighlightPresharedKey.rawValue:
+            return NSColor(hex: "#643820") // Preprocessor directives in Xcode
+        case HighlightIP.rawValue, HighlightHost.rawValue:
+            return NSColor(hex: "#0E0EFF") // URLs in Xcode
+        case HighlightCidr.rawValue, HighlightPort.rawValue:
+            return NSColor(hex: "#815F03") // Attributes in Xcode
+        case HighlightMTU.rawValue, HighlightKeepalive.rawValue:
+            return NSColor(hex: "#1C00CF") // Numbers in Xcode
+        case HighlightComment.rawValue:
+            return NSColor(hex: "#536579") // Comments in Xcode
+        case HighlightError.rawValue:
+            return NSColor(hex: "#C41A16") // Strings in Xcode
+        default:
+            return NSColor(hex: "#000000") // Plain text in Xcode
+        }
+    }
+}
+
+struct ConfTextDarkAquaColorTheme: ConfTextColorTheme {
+    func color(for highlightType: highlight_type) -> NSColor {
+        switch highlightType.rawValue {
+        case HighlightSection.rawValue:
+            return NSColor(hex: "#91D462") // Class name in Xcode
+        case HighlightField.rawValue:
+            return NSColor(hex: "#FC5FA3") // Keywords in Xcode
+        case HighlightPublicKey.rawValue, HighlightPrivateKey.rawValue, HighlightPresharedKey.rawValue:
+            return NSColor(hex: "#FD8F3F") // Preprocessor directives in Xcode
+        case HighlightIP.rawValue, HighlightHost.rawValue:
+            return NSColor(hex: "#53A5FB") // URLs in Xcode
+        case HighlightCidr.rawValue, HighlightPort.rawValue:
+            return NSColor(hex: "#75B492") // Attributes in Xcode
+        case HighlightMTU.rawValue, HighlightKeepalive.rawValue:
+            return NSColor(hex: "#9686F5") // Numbers in Xcode
+        case HighlightComment.rawValue:
+            return NSColor(hex: "#6C7986") // Comments in Xcode
+        case HighlightError.rawValue:
+            return NSColor(hex: "#FF4C4C") // Strings in Xcode
+        default:
+            return NSColor(hex: "#FFFFFF") // Plain text in Xcode
+        }
+    }
+}

WireGuard/WireGuard/UI/macOS/View/ConfTextStorage.swift

@@ -7,24 +7,11 @@ private let fontSize: CGFloat = 15
 
 class ConfTextStorage: NSTextStorage {
 
-    struct TextColorTheme {
-        let plainText: NSColor
-        let sections: NSColor
-        let keyType: NSColor
-        let key: NSColor
-        let url: NSColor
-        let urlAttribute: NSColor
-        let comments: NSColor
-        let number: NSColor
-        let error: NSColor
-    }
-
     let defaultFont = NSFontManager.shared.convertWeight(true, of: NSFont.systemFont(ofSize: fontSize))
     private let boldFont = NSFont.boldSystemFont(ofSize: fontSize)
     private lazy var italicFont = NSFontManager.shared.convert(defaultFont, toHaveTrait: .italicFontMask)
 
-    private var defaultAttributes: [NSAttributedString.Key: Any]! //swiftlint:disable:this implicitly_unwrapped_optional
+    private var textColorTheme: ConfTextColorTheme?
-    private var highlightAttributes: [UInt32: [NSAttributedString.Key: Any]]! //swiftlint:disable:this implicitly_unwrapped_optional
 
     private let backingStore: NSMutableAttributedString
     private(set) var hasError = false
@@ -43,73 +30,25 @@ class ConfTextStorage: NSTextStorage {
         fatalError("init(pasteboardPropertyList:ofType:) has not been implemented")
     }
 
-    //swiftlint:disable:next function_body_length
+    func nonColorAttributes(for highlightType: highlight_type) -> [NSAttributedString.Key: Any] {
-    func updateAttributes(for theme: TextColorTheme) {
+        switch highlightType.rawValue {
-        self.defaultAttributes = [
+        case HighlightSection.rawValue, HighlightField.rawValue:
-            .foregroundColor: theme.plainText,
+            return [.font: boldFont]
-            .font: defaultFont
+        case HighlightPublicKey.rawValue, HighlightPrivateKey.rawValue, HighlightPresharedKey.rawValue,
-        ]
+             HighlightIP.rawValue, HighlightCidr.rawValue, HighlightHost.rawValue, HighlightPort.rawValue,
-
+             HighlightMTU.rawValue, HighlightKeepalive.rawValue, HighlightDelimiter.rawValue:
-        self.highlightAttributes = [
+            return [.font: defaultFont]
-            HighlightSection.rawValue: [
+        case HighlightComment.rawValue:
-                .foregroundColor: theme.sections,
+            return [.font: italicFont]
-                .font: boldFont
+        case HighlightError.rawValue:
-            ],
+            return [.font: defaultFont, .underlineStyle: 1]
-            HighlightField.rawValue: [
+        default:
-                .foregroundColor: theme.keyType,
+            return [:]
-                .font: boldFont
+        }
-            ],
+    }
-            HighlightPublicKey.rawValue: [
-                .foregroundColor: theme.key,
-                .font: defaultFont
-            ],
-            HighlightPrivateKey.rawValue: [
-                .foregroundColor: theme.key,
-                .font: defaultFont
-            ],
-            HighlightPresharedKey.rawValue: [
-                .foregroundColor: theme.key,
-                .font: defaultFont
-            ],
-            HighlightIP.rawValue: [
-                .foregroundColor: theme.url,
-                .font: defaultFont
-            ],
-            HighlightCidr.rawValue: [
-                .foregroundColor: theme.urlAttribute,
-                .font: defaultFont
-            ],
-            HighlightHost.rawValue: [
-                .foregroundColor: theme.url,
-                .font: defaultFont
-            ],
-            HighlightPort.rawValue: [
-                .foregroundColor: theme.urlAttribute,
-                .font: defaultFont
-            ],
-            HighlightMTU.rawValue: [
-                .foregroundColor: theme.number,
-                .font: defaultFont
-            ],
-            HighlightKeepalive.rawValue: [
-                .foregroundColor: theme.number,
-                .font: defaultFont
-            ],
-            HighlightComment.rawValue: [
-                .foregroundColor: theme.comments,
-                .font: italicFont
-            ],
-            HighlightDelimiter.rawValue: [
-                .foregroundColor: theme.plainText,
-                .font: defaultFont
-            ],
-            HighlightError.rawValue: [
-                .foregroundColor: theme.error,
-                .font: defaultFont,
-                .underlineStyle: 1
-            ]
-        ]
 
+    func updateAttributes(for textColorTheme: ConfTextColorTheme) {
+        self.textColorTheme = textColorTheme
         highlightSyntax()
     }
 
@@ -152,8 +91,12 @@ class ConfTextStorage: NSTextStorage {
         while spans.pointee.type != HighlightEnd {
             let span = spans.pointee
 
-            let attributes = self.highlightAttributes[span.type.rawValue] ?? defaultAttributes
+            let range = NSRange(location: span.start, length: span.len)
-            backingStore.setAttributes(attributes, range: NSRange(location: span.start, length: span.len))
+            backingStore.setAttributes(nonColorAttributes(for: span.type), range: range)
+            if let textColorTheme = textColorTheme {
+                let color = textColorTheme.color(for: span.type)
+                backingStore.addAttribute(.foregroundColor, value: color, range: range)
+            }
 
             if span.type == HighlightError {
                 hasError = true

WireGuard/WireGuard/UI/macOS/View/ConfTextView.swift

@@ -44,14 +44,12 @@ class ConfTextView: NSTextView {
     }
 
     private func updateTheme() {
-        let theme: ConfTextStorage.TextColorTheme
         switch effectiveAppearance.bestMatch(from: [.aqua, .darkAqua]) ?? .aqua {
         case .darkAqua:
-            theme = ConfTextStorage.TextColorTheme(plainText: NSColor(hex: "#FFFFFF"), sections: NSColor(hex: "#91D462"), keyType: NSColor(hex: "#FC5FA3"), key: NSColor(hex: "#FD8F3F"), url: NSColor(hex: "#53A5FB"), urlAttribute: NSColor(hex: "#75B492"), comments: NSColor(hex: "#6C7986"), number: NSColor(hex: "#9686F5"), error: NSColor(hex: "#FF4C4C"))
+            confTextStorage.updateAttributes(for: ConfTextDarkAquaColorTheme())
         default:
-            theme = ConfTextStorage.TextColorTheme(plainText: NSColor(hex: "#000000"), sections: NSColor(hex: "#326D74"), keyType: NSColor(hex: "#9B2393"), key: NSColor(hex: "#643820"), url: NSColor(hex: "#0E0EFF"), urlAttribute: NSColor(hex: "#815F03"), comments: NSColor(hex: "#536579"), number: NSColor(hex: "#1C00CF"), error: NSColor(hex: "#C41A16"))
+            confTextStorage.updateAttributes(for: ConfTextAquaColorTheme())
         }
-        confTextStorage.updateAttributes(for: theme)
     }
 
 }