refactor: split reader architecture and chrome handling

2026-05-31 21:47:54 +08:00
parent ea21c6a831
commit 44202357c0
80 changed files with 10635 additions and 8522 deletions
@@ -0,0 +1,75 @@
+import UIKit
+
+/// 内容视图注册和复用扩展
+/// 提供类似 UITableView 的 register/dequeueReusable 机制
+extension RDReaderView {
+    /// 注册内容视图类型
+    public func register(contentView: UIView.Type, contentViewWithReuseIdentifier identifier: String) {
+        contentViews[identifier] = contentView
+        collectionView.register(RDReaderContentCell.self, forCellWithReuseIdentifier: identifier)
+    }
+
+    /// 获取可复用的内容视图
+    /// 优先从当前显示的 cell 中获取，其次创建新实例
+    public func dequeueReusableContentView(withReuseIdentifier identifier: String, for pageNum: Int) -> UIView {
+        if self.currentDisplayType != .pageCurl, let cell = self.collectionView.cellForItem(at: IndexPath(row: pageNum, section: 0)) as? RDReaderContentCell, let containerView = cell.containerView {
+            return containerView
+        }
+        let contentViewClass = contentViews[identifier]
+        assert(contentViewClass != nil, "请调用register(contentView：contentViewWithReuseIdentifier：）")
+        var contentView = contentViewClass!.init()
+        return contentView
+    }
+
+    /// 获取指定页码的内容视图
+    /// pageCurl 模式从 PageViewController 获取，滚动模式从 CollectionView cell 获取
+    public func pageContentView(pageNum: Int) -> UIView? {
+        if currentDisplayType == .pageCurl {
+            return (self.pageViewController.viewControllers?.first as? RDReaderPageChildViewController)?.contentView
+        } else {
+            let cell = collectionView.cellForItem(at: IndexPath(item: pageNum, section: 0)) as? RDReaderContentCell
+            return cell?.containerView
+        }
+    }
+
+    /// 返回当前阅读模式下单页内容容器的实际尺寸。
+    /// 优先使用已经显示出来的内容视图尺寸；若页面尚未装载，则回退到当前模式下的理论单页尺寸。
+    public func resolvedSinglePageSize(pageNum: Int? = nil) -> CGSize {
+        let targetPage = pageNum ?? (currentPage >= 0 ? currentPage : nil)
+        if let targetPage,
+           let contentView = pageContentView(pageNum: targetPage),
+           contentView.bounds.width > 0,
+           contentView.bounds.height > 0 {
+            return contentView.bounds.size
+        }
+
+        if currentDisplayType == .pageCurl {
+            if let childViewController = pageViewController.viewControllers?.first as? RDReaderPageChildViewController,
+               childViewController.view.bounds.width > 0,
+               childViewController.view.bounds.height > 0 {
+                return childViewController.view.bounds.size
+            }
+            if pageViewController.view.bounds.width > 0, pageViewController.view.bounds.height > 0 {
+                return pageViewController.view.bounds.size
+            }
+            return bounds.size
+        }
+
+        let containerBounds = collectionView.bounds.size == .zero ? bounds.size : collectionView.bounds.size
+        guard containerBounds.width > 0, containerBounds.height > 0 else {
+            return bounds.size
+        }
+
+        switch currentDisplayType {
+        case .horizontalScroll:
+            return CGSize(
+                width: containerBounds.width / CGFloat(max(pagesPerScreen, 1)),
+                height: containerBounds.height
+            )
+        case .verticalScroll:
+            return containerBounds
+        case .pageCurl:
+            return bounds.size
+        }
+    }
+}