Epub阅读器0.0.1

2026-05-21 19:40:51 +08:00
commit daa36d8fe7
559 changed files with 106266 additions and 0 deletions
@@ -0,0 +1,105 @@
+import UIKit
+
+public final class RDURLReaderController: UIViewController {
+    private let bookURL: URL
+    private let epubConfiguration: RDEPUBReaderConfiguration
+    private var embeddedController: UIViewController?
+
+    public init(
+        bookURL: URL,
+        epubConfiguration: RDEPUBReaderConfiguration = RDEPUBReaderConfiguration()
+    ) {
+        self.bookURL = bookURL
+        self.epubConfiguration = epubConfiguration
+        super.init(nibName: nil, bundle: nil)
+    }
+
+    @available(*, unavailable)
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    public override func viewDidLoad() {
+        super.viewDidLoad()
+        view.backgroundColor = .systemBackground
+        title = bookURL.deletingPathExtension().lastPathComponent
+        embedReaderController()
+    }
+
+    private func embedReaderController() {
+        let controller: UIViewController
+        if bookURL.pathExtension.lowercased() == "epub" {
+            controller = RDEPUBReaderController(
+                epubURL: bookURL,
+                configuration: epubConfiguration
+            )
+        } else {
+            let bookIdentifier = bookURL.lastPathComponent
+            let bookTitle = bookURL.deletingPathExtension().lastPathComponent
+            let pageSize = currentTextPageSize()
+            let renderStyle = currentTextRenderStyle()
+            let builder = RDPlainTextBookBuilder()
+            if let textBook = try? builder.build(textFileURL: bookURL, pageSize: pageSize, style: renderStyle) {
+                controller = RDEPUBReaderController(
+                    textBook: textBook,
+                    bookIdentifier: bookIdentifier,
+                    title: bookTitle,
+                    textFileURL: bookURL,
+                    configuration: epubConfiguration
+                )
+            } else {
+                // 分页失败时回退到纯文本展示
+                let fallback = UIViewController()
+                let textView = UITextView()
+                textView.isEditable = false
+                textView.text = rd_decodeTextFile(url: bookURL)
+                fallback.view = textView
+                controller = fallback
+            }
+        }
+        embeddedController = controller
+        addChild(controller)
+        controller.view.translatesAutoresizingMaskIntoConstraints = false
+        view.addSubview(controller.view)
+        NSLayoutConstraint.activate([
+            controller.view.topAnchor.constraint(equalTo: view.topAnchor),
+            controller.view.leadingAnchor.constraint(equalTo: view.leadingAnchor),
+            controller.view.trailingAnchor.constraint(equalTo: view.trailingAnchor),
+            controller.view.bottomAnchor.constraint(equalTo: view.bottomAnchor),
+        ])
+        controller.didMove(toParent: self)
+    }
+
+    private func currentTextPageSize() -> CGSize {
+        let viewportSize = UIScreen.main.bounds.size
+        let insets = epubConfiguration.reflowableContentInsets
+        return CGSize(
+            width: max(viewportSize.width - insets.left - insets.right, 1),
+            height: max(viewportSize.height - insets.top - insets.bottom, 1)
+        )
+    }
+
+    private func currentTextRenderStyle() -> RDEPUBTextRenderStyle {
+        let font = UIFont.systemFont(ofSize: epubConfiguration.fontSize)
+        let lineSpacing = max(font.lineHeight * (epubConfiguration.lineHeightMultiple - 1), 4)
+        return RDEPUBTextRenderStyle(
+            font: font,
+            lineSpacing: lineSpacing,
+            textColor: epubConfiguration.theme.contentTextColor,
+            backgroundColor: epubConfiguration.theme.contentBackgroundColor
+        )
+    }
+
+    private func rd_decodeTextFile(url: URL) -> String {
+        if let content = try? NSString(contentsOf: url, encoding: String.Encoding.utf8.rawValue) as String {
+            return content
+        }
+        if let content = try? NSString(contentsOf: url, encoding: 0x80000632) as String {
+            return content
+        }
+        if let content = try? NSString(contentsOf: url, encoding: 0x80000631) as String {
+            return content
+        }
+        return ""
+    }
+}