feat: open-source 小浣熊阅读 for iOS

2026-10-24 04:41:23 +08:00 · 2026-10-14 11:37:36 +08:00
commit ffc9e9d91d
193 changed files with 41382 additions and 0 deletions
@@ -0,0 +1,120 @@
+import CoreText
+import SwiftUI
+import UIKit
+
+private struct ReaderPositionPreferenceKey: PreferenceKey {
+    static let defaultValue: [Int: CGFloat] = [:]
+    static func reduce(value: inout [Int: CGFloat], nextValue: () -> [Int: CGFloat]) {
+        value.merge(nextValue(), uniquingKeysWith: { _, new in new })
+    }
+}
+
+struct ReaderStylePreset: Identifiable {
+    let id: String
+    let name: String
+    let background: UIColor
+    let foreground: UIColor
+
+    static let legadoDefaults: [ReaderStylePreset] = [
+        .init(id: "wechat", name: "微信读书", background: UIColor(hex: 0xC0EDC6), foreground: UIColor(hex: 0x0B0B0B)),
+        .init(id: "preset1", name: "预设1", background: UIColor(hex: 0xFFFFFF), foreground: UIColor(hex: 0x000000)),
+        .init(id: "preset2", name: "预设2", background: UIColor(hex: 0xDDC090), foreground: UIColor(hex: 0x3E3422)),
+        .init(id: "preset3", name: "预设3", background: UIColor(hex: 0xC2D8AA), foreground: UIColor(hex: 0x596C44)),
+        .init(id: "preset4", name: "预设4", background: UIColor(hex: 0xDBB8E2), foreground: UIColor(hex: 0x68516C)),
+        .init(id: "preset5", name: "预设5", background: UIColor(hex: 0xABCEE0), foreground: UIColor(hex: 0x3D4C54)),
+        .init(id: "night", name: "夜间", background: UIColor(hex: 0x000000), foreground: UIColor(hex: 0xADADAD))
+    ]
+    static let eInk = ReaderStylePreset(
+        id: "eink",
+        name: "E-Ink",
+        background: UIColor(hex: 0xFFFFFF),
+        foreground: UIColor(hex: 0x000000)
+    )
+
+    static func resolve(_ id: String) -> ReaderStylePreset {
+        let migratedID = switch id {
+        case "dark": "night"
+        case "light": "preset1"
+        case "paper": "preset2"
+        default: id
+        }
+        return legadoDefaults.first(where: { $0.id == migratedID }) ?? legadoDefaults[0]
+    }
+}
+
+private extension UIColor {
+    convenience init(hex: UInt32) {
+        self.init(
+            red: CGFloat((hex >> 16) & 0xff) / 255,
+            green: CGFloat((hex >> 8) & 0xff) / 255,
+            blue: CGFloat(hex & 0xff) / 255,
+            alpha: 1
+        )
+    }
+}
+
+enum ReaderBackgroundStore {
+    static var url: URL {
+        FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask)[0]
+            .appendingPathComponent("Legado/reader-background.jpg")
+    }
+
+    static func load() -> UIImage? {
+        guard let data = try? Data(contentsOf: url) else { return nil }
+        return UIImage(data: data)
+    }
+
+    static func save(_ data: Data) throws -> UIImage {
+        guard let image = UIImage(data: data), let encoded = image.jpegData(compressionQuality: 0.9) else {
+            throw CocoaError(.fileReadCorruptFile)
+        }
+        try FileManager.default.createDirectory(at: url.deletingLastPathComponent(), withIntermediateDirectories: true)
+        try encoded.write(to: url, options: .atomic)
+        return image
+    }
+
+    static func remove() { try? FileManager.default.removeItem(at: url) }
+}
+
+enum ReaderFontStore {
+    static var directory: URL {
+        FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask)[0]
+            .appendingPathComponent("Legado/fonts", isDirectory: true)
+    }
+
+    static func install(from source: URL) throws -> String {
+        let accessing = source.startAccessingSecurityScopedResource()
+        defer { if accessing { source.stopAccessingSecurityScopedResource() } }
+        try FileManager.default.createDirectory(at: directory, withIntermediateDirectories: true)
+        let target = directory.appendingPathComponent(source.lastPathComponent)
+        if target != source {
+            try? FileManager.default.removeItem(at: target)
+            try FileManager.default.copyItem(at: source, to: target)
+        }
+        guard font(at: target.path, size: 20, weight: 0) != nil else {
+            throw CocoaError(.fileReadCorruptFile)
+        }
+        return target.path
+    }
+
+    static func font(at path: String, size: CGFloat, weight: Int) -> UIFont? {
+        guard !path.isEmpty,
+              let provider = CGDataProvider(url: URL(fileURLWithPath: path) as CFURL),
+              let graphicsFont = CGFont(provider) else { return nil }
+        CTFontManagerRegisterGraphicsFont(graphicsFont, nil)
+        guard let postScriptName = graphicsFont.postScriptName else { return nil }
+        let name = postScriptName as String
+        guard let base = UIFont(name: name, size: size) else { return nil }
+        if weight == 1,
+           let descriptor = base.fontDescriptor.withSymbolicTraits(.traitBold) {
+            return UIFont(descriptor: descriptor, size: size)
+        }
+        if weight == 2 {
+            let descriptor = base.fontDescriptor.addingAttributes([
+                .traits: [UIFontDescriptor.TraitKey.weight: UIFont.Weight.light.rawValue]
+            ])
+            return UIFont(descriptor: descriptor, size: size)
+        }
+        return base
+    }
+}