feat: open-source 小浣熊阅读 for iOS

2026-10-20 19:21:22 +08:00 · 2026-10-14 11:37:36 +08:00
commit ffc9e9d91d
193 changed files with 41382 additions and 0 deletions
@@ -0,0 +1,190 @@
+import SwiftUI
+import UIKit
+
+struct SyntaxCodeEditor: UIViewRepresentable {
+    enum Language { case json, rule, javascript, regex }
+    @Binding var text: String
+    var language: Language = .rule
+
+    func makeCoordinator() -> Coordinator { Coordinator(self) }
+
+    func makeUIView(context: Context) -> UITextView {
+        let view = UITextView()
+        view.delegate = context.coordinator
+        view.font = .monospacedSystemFont(ofSize: 14, weight: .regular)
+        view.backgroundColor = .secondarySystemGroupedBackground
+        view.textContainerInset = UIEdgeInsets(top: 14, left: 12, bottom: 20, right: 12)
+        view.autocorrectionType = .no
+        view.autocapitalizationType = .none
+        view.smartQuotesType = .no
+        view.smartDashesType = .no
+        view.smartInsertDeleteType = .no
+        view.keyboardDismissMode = .interactive
+        view.alwaysBounceVertical = true
+        view.accessibilityIdentifier = "syntaxCodeEditor"
+        if #available(iOS 16.0, *) { view.isFindInteractionEnabled = true }
+        let bar = UIToolbar()
+        bar.sizeToFit()
+        bar.items = [
+            UIBarButtonItem(image: UIImage(systemName: "magnifyingglass"), primaryAction: UIAction(title: "", subtitle: nil) { [weak view, coordinator = context.coordinator] _ in
+                guard let view else { return }
+                if #available(iOS 16.0, *) { view.findInteraction?.presentFindNavigator(showingReplace: true) }
+                else { coordinator.presentFindAndReplace(in: view) }
+            }),
+            UIBarButtonItem(image: UIImage(systemName: "arrow.uturn.backward"), primaryAction: UIAction(title: "", subtitle: nil) { [weak view] _ in view?.undoManager?.undo() }),
+            UIBarButtonItem(image: UIImage(systemName: "arrow.uturn.forward"), primaryAction: UIAction(title: "", subtitle: nil) { [weak view] _ in view?.undoManager?.redo() }),
+        ] + ["@", "$", "{}", "[]", "##", "\n", "\t"].map { symbol in
+            UIBarButtonItem(title: symbol == "\n" ? "↵" : symbol == "\t" ? "⇥" : symbol,
+                primaryAction: UIAction(title: "", subtitle: nil) { [weak view] _ in view?.insertText(symbol) })
+        } + [UIBarButtonItem(systemItem: .flexibleSpace), UIBarButtonItem(title: "完成", primaryAction: UIAction(title: "", subtitle: nil) { [weak view] _ in view?.resignFirstResponder() })]
+        view.inputAccessoryView = bar
+        view.text = text
+        context.coordinator.highlight(view)
+        return view
+    }
+
+    func updateUIView(_ view: UITextView, context: Context) {
+        context.coordinator.parent = self
+        guard view.markedTextRange == nil else { return }
+        // SwiftUI can render an older binding snapshot while the next native
+        // keystroke is already in the text view. Wait for acknowledgement of
+        // the latest local edit instead of replacing it with that snapshot.
+        if let pending = context.coordinator.pendingLocalText {
+            guard text == pending else { return }
+            context.coordinator.pendingLocalText = nil
+        }
+        if view.text != text {
+            let selection = view.selectedRange
+            view.text = text
+            view.selectedRange = NSRange(location: min(selection.location, view.text.utf16.count), length: 0)
+        }
+        context.coordinator.highlight(view)
+    }
+
+    final class Coordinator: NSObject, UITextViewDelegate {
+        var parent: SyntaxCodeEditor
+        private var highlightedText: String?
+        private var highlightedStyle: UIUserInterfaceStyle?
+        private var highlightedLanguage: Language?
+        var pendingLocalText: String?
+        init(_ parent: SyntaxCodeEditor) { self.parent = parent }
+
+        func presentFindAndReplace(in view: UITextView) {
+            guard var presenter = view.window?.rootViewController else { return }
+            while let presented = presenter.presentedViewController { presenter = presented }
+            let alert = UIAlertController(title: "查找与替换", message: nil, preferredStyle: .alert)
+            alert.addTextField { $0.placeholder = "查找内容" }
+            alert.addTextField { $0.placeholder = "替换为（可留空）" }
+            alert.addAction(UIAlertAction(title: "查找下一个", style: .default) { [weak view, weak alert] _ in
+                guard let view, let query = alert?.textFields?.first?.text, !query.isEmpty else { return }
+                let text = (view.text ?? "") as NSString
+                let start = min(NSMaxRange(view.selectedRange), text.length)
+                var range = text.range(of: query, range: NSRange(location: start, length: text.length - start))
+                if range.location == NSNotFound { range = text.range(of: query) }
+                guard range.location != NSNotFound else { return }
+                view.becomeFirstResponder()
+                view.selectedRange = range
+                view.scrollRangeToVisible(range)
+            })
+            alert.addAction(UIAlertAction(title: "全部替换", style: .default) { [weak view, weak alert] _ in
+                guard let view, let fields = alert?.textFields,
+                      let query = fields.first?.text, !query.isEmpty else { return }
+                let original = view.text ?? ""
+                let replacement = original.replacingOccurrences(of: query, with: fields.last?.text ?? "")
+                guard replacement != original else { return }
+                view.becomeFirstResponder()
+                view.selectedRange = NSRange(location: 0, length: original.utf16.count)
+                view.insertText(replacement)
+            })
+            alert.addAction(UIAlertAction(title: "取消", style: .cancel))
+            presenter.present(alert, animated: true)
+        }
+
+        func textViewDidChange(_ view: UITextView) {
+            guard view.markedTextRange == nil else { return }
+            pendingLocalText = view.text
+            parent.text = view.text
+            highlight(view)
+        }
+
+        func textViewDidEndEditing(_ view: UITextView) {
+            pendingLocalText = nil
+            parent.text = view.text
+            highlight(view)
+        }
+
+        func highlight(_ view: UITextView) {
+            guard view.markedTextRange == nil,
+                  highlightedText != view.text || highlightedStyle != view.traitCollection.userInterfaceStyle || highlightedLanguage != parent.language else { return }
+            highlightedText = view.text
+            highlightedStyle = view.traitCollection.userInterfaceStyle
+            highlightedLanguage = parent.language
+            let storage = view.textStorage
+            let selection = view.selectedRange
+            let all = NSRange(location: 0, length: storage.length)
+            storage.beginEditing()
+            storage.addAttributes([.font: UIFont.monospacedSystemFont(ofSize: 14, weight: .regular), .foregroundColor: UIColor.label], range: all)
+            if storage.length <= 500_000 {
+                let tokens: [(String, UIColor)] = [
+                    (#"\b(?:true|false|null|undefined|return|var|let|const|if|else|function|new|for|while|try|catch|throw|await|async)\b"#, .systemPurple),
+                    (#"\b\d+(?:\.\d+)?\b"#, .systemOrange),
+                    (#"@(?:css|xpath|json|js|put|get):?|\$\.|&&|\|\||%%|##|\{\{|\}\}"#, .systemPink),
+                    (#"[{}\[\]()]"#, .systemTeal),
+                    (#""(?:\\.|[^"\\])*"|'(?:\\.|[^'\\])*'|`(?:\\.|[^`\\])*`"#, .systemGreen),
+                    (#""(?:\\.|[^"\\])*"(?=\s*:)"#, .systemBlue),
+                ]
+                for (pattern, color) in tokens {
+                    guard let regex = try? NSRegularExpression(pattern: pattern) else { continue }
+                    regex.enumerateMatches(in: view.text, range: all) { result, _, _ in
+                        if let result { storage.addAttribute(.foregroundColor, value: color, range: result.range) }
+                    }
+                }
+                if parent.language == .regex {
+                    for pattern in [#"[.*+?^$|]"#, #"\\[dDsSwWbB0-9]|\{[0-9,]+\}"#] {
+                        let regex = try? NSRegularExpression(pattern: pattern)
+                        regex?.enumerateMatches(in: view.text, range: all) { result, _, _ in
+                            if let result { storage.addAttribute(.foregroundColor, value: UIColor.systemPink, range: result.range) }
+                        }
+                    }
+                }
+                if parent.language == .javascript {
+                    let pattern = #"(?m)^\s*//.*$|/\*[\s\S]*?\*/"#
+                    let regex = try? NSRegularExpression(pattern: pattern)
+                    regex?.enumerateMatches(in: view.text, range: all) { result, _, _ in
+                        if let result { storage.addAttribute(.foregroundColor, value: UIColor.secondaryLabel, range: result.range) }
+                    }
+                }
+            }
+            storage.endEditing()
+            view.selectedRange = selection
+            view.typingAttributes = [.font: UIFont.monospacedSystemFont(ofSize: 14, weight: .regular), .foregroundColor: UIColor.label]
+        }
+    }
+}
+
+struct RuleCodeFieldView: View {
+    let title: String
+    let path: String
+    @Binding var text: String
+    var language: SyntaxCodeEditor.Language = .rule
+    var help: String?
+
+    var body: some View {
+        VStack(spacing: 0) {
+            Text(path).font(.caption.monospaced()).foregroundStyle(.secondary)
+                .frame(maxWidth: .infinity, alignment: .leading).padding(12)
+            if let help {
+                Text(help).font(.footnote).foregroundStyle(.secondary)
+                    .frame(maxWidth: .infinity, alignment: .leading).padding(.horizontal, 12).padding(.bottom, 10)
+            }
+            SyntaxCodeEditor(text: $text, language: language)
+            HStack {
+                Text("\(text.components(separatedBy: "\n").count) 行 · \(text.utf16.count) 字符")
+                Spacer()
+                if language == .rule { Text("CSS · XPath · JSONPath · JS") }
+            }.font(.caption).foregroundStyle(.secondary).padding(12)
+        }
+        .navigationTitle(title)
+        .navigationBarTitleDisplayMode(.inline)
+    }
+}