fix(appearance): 完善深色模式和阅读页面对比度

- 区分按钮填充与图标颜色，统一书架、书源、搜索和阅读设置的选中态 - 调整编辑器语法高亮、键盘工具栏及统计卡片的浅深色显示 - 适配 RSS 正文和登录网页背景，保留书源自定义样式和页面状态 - 补充外观切换、页面对比度和管理页面的回归测试
2026-10-24 21:01:22 +08:00 · 2026-10-22 10:53:19 +08:00
parent bf72ebc894
commit 45cf5b5482
21 changed files with 611 additions and 46 deletions
@@ -0,0 +1,86 @@
+import SwiftUI
+import UIKit
+import WebKit
+import XCTest
+@testable import Legado
+
+@MainActor
+final class AppearanceContrastTests: XCTestCase {
+    func testLoginWebViewUsesAdaptiveBackgroundBeforeContentArrives() async throws {
+        var source = BookSource(bookSourceUrl: "https://appearance.invalid", bookSourceName: "外观测试")
+        source.loginUrl = "about:blank"
+        let controller = UIHostingController(rootView: SourceLoginView(source: source))
+        let window = UIWindow(frame: CGRect(x: 0, y: 0, width: 390, height: 844))
+        window.overrideUserInterfaceStyle = .dark
+        window.rootViewController = controller
+        window.makeKeyAndVisible()
+        defer { window.isHidden = true }
+        func webView(in view: UIView) -> WKWebView? {
+            if let view = view as? WKWebView { return view }
+            return view.subviews.lazy.compactMap { webView(in: $0) }.first
+        }
+        window.layoutIfNeeded()
+        for _ in 0..<20 {
+            if webView(in: controller.view) != nil { break }
+            try await Task.sleep(nanoseconds: 50_000_000)
+        }
+        let web = try XCTUnwrap(webView(in: controller.view))
+        XCTAssertFalse(web.isOpaque)
+        for style in [UIUserInterfaceStyle.dark, .light] {
+            window.overrideUserInterfaceStyle = style
+            window.layoutIfNeeded()
+            let traits = UITraitCollection(userInterfaceStyle: style)
+            let background = try XCTUnwrap(web.backgroundColor).resolvedColor(with: traits)
+            let scroll = try XCTUnwrap(web.scrollView.backgroundColor).resolvedColor(with: traits)
+            if style == .dark {
+                XCTAssertLessThan(luminance(background), 0.15)
+                XCTAssertLessThan(luminance(scroll), 0.15)
+            } else {
+                XCTAssertGreaterThan(luminance(background), 0.6)
+                XCTAssertGreaterThan(luminance(scroll), 0.6)
+            }
+        }
+    }
+
+    func testSyntaxTokensHaveReadableContrastInBaseAndElevatedAppearances() {
+        let samples: [(SyntaxCodeEditor.Language, String)] = [
+            (.json, #"{"title":"正文","count":12,"enabled":true,"empty":null}"#),
+            (.rule, "@css:div && $.title {{key}} ##"),
+            (.regex, #"\d+.*(word){2,4}"#),
+            (.javascript, "// comment\nconst value = 'text'; return 123; /* comment */")
+        ]
+        for style in [UIUserInterfaceStyle.light, .dark] {
+            for level in [UIUserInterfaceLevel.base, .elevated] {
+                let traits = UITraitCollection(traitsFrom: [
+                    UITraitCollection(userInterfaceStyle: style),
+                    UITraitCollection(userInterfaceLevel: level)
+                ])
+                for (language, text) in samples {
+                    let editor = SyntaxCodeEditor(text: .constant(text), language: language)
+                    let view = UITextView()
+                    view.overrideUserInterfaceStyle = style
+                    view.text = text
+                    editor.makeCoordinator().highlight(view)
+                    let background = UIColor.secondarySystemGroupedBackground.resolvedColor(with: traits)
+                    view.textStorage.enumerateAttribute(.foregroundColor, in: NSRange(location: 0, length: view.textStorage.length)) { color, _, _ in
+                        guard let color = color as? UIColor else { return XCTFail("Missing syntax color") }
+                        let foreground = color.resolvedColor(with: traits)
+                        let values = [luminance(foreground), luminance(background)].sorted()
+                        XCTAssertGreaterThanOrEqual((values[1] + 0.05) / (values[0] + 0.05), 4.5,
+                                                    "Low contrast for \(language), \(style), \(level)")
+                    }
+                }
+            }
+        }
+    }
+
+    private func luminance(_ color: UIColor) -> Double {
+        var r: CGFloat = 0, g: CGFloat = 0, b: CGFloat = 0, a: CGFloat = 0
+        XCTAssertTrue(color.getRed(&r, green: &g, blue: &b, alpha: &a))
+        func linear(_ value: CGFloat) -> Double {
+            let value = Double(value)
+            return value <= 0.04045 ? value / 12.92 : pow((value + 0.055) / 1.055, 2.4)
+        }
+        return 0.2126 * linear(r) + 0.7152 * linear(g) + 0.0722 * linear(b)
+    }
+}