修改分页问题

Sources/RDReaderView/EPUBTextRendering/RDEPUBDTCoreTextRenderer.swift

@@ -104,7 +104,8 @@ public struct RDEPUBDTCoreTextRenderer: RDEPUBTextRenderer {
             guard let element else { return }
             RDEPUBTextRendererSupport.prepareHTMLElementForReaderRendering(
                 element,
-                style: request.style
+                style: request.style,
+                maxImageSize: resolvedMaxImageSize(for: request)
             )
         }
         return builder?.generatedAttributedString()
@@ -116,7 +117,7 @@ public struct RDEPUBDTCoreTextRenderer: RDEPUBTextRenderer {
     ///   确保最终行距与用户设置的 style.lineSpacing 一致。
     private func dtOptions(request: RDEPUBTextChapterRenderRequest) -> [AnyHashable: Any] {
         let style = request.style
-        let screenBounds = UIScreen.main.bounds.insetBy(dx: 20, dy: 28)
+        let maxImageSize = resolvedMaxImageSize(for: request)
         var options: [AnyHashable: Any] = [
             NSTextSizeMultiplierDocumentOption: 1.0,
             DTDefaultFontFamily: style.font.familyName,
@@ -124,7 +125,7 @@ public struct RDEPUBDTCoreTextRenderer: RDEPUBTextRenderer {
             DTDefaultFontSize: style.font.pointSize,
             DTDefaultLineHeightMultiplier: max((style.font.lineHeight + style.lineSpacing) / max(style.font.lineHeight, 1), 1),
             DTUseiOS6Attributes: true,
-            DTMaxImageSize: NSValue(cgSize: screenBounds.size)
+            DTMaxImageSize: NSValue(cgSize: maxImageSize)
         ]
 
         if let baseURL = request.context.baseURL {
@@ -136,5 +137,18 @@ public struct RDEPUBDTCoreTextRenderer: RDEPUBTextRenderer {
 
         return options
     }
+
+    private func resolvedMaxImageSize(for request: RDEPUBTextChapterRenderRequest) -> CGSize {
+        if let pageSize = request.pageSize {
+            let layoutConfig = request.layoutConfig ?? .default
+            let contentRect = layoutConfig.contentRect(fallback: pageSize)
+            let maxWidth = max(round(contentRect.width), 1)
+            let maxHeight = max(round(contentRect.height * layoutConfig.imageMaxHeightRatio), 1)
+            return CGSize(width: maxWidth, height: maxHeight)
+        }
+
+        let screenBounds = UIScreen.main.bounds.insetBy(dx: 20, dy: 28)
+        return CGSize(width: max(round(screenBounds.width), 1), height: max(round(screenBounds.height * 0.85), 1))
+    }
 #endif
 }