修改分页问题

Sources/RDReaderView/EPUBUI/RDEPUBPageLayoutSnapshot.swift

@@ -139,9 +139,10 @@ struct RDEPUBPageLayoutSnapshot {
         var lines: [RDEPUBPageLine] = []
         var runs: [RDEPUBPageRun] = []
         var attachments: [RDEPUBPageAttachment] = []
+        let pageOffset = page.pageStartOffset
 
         for dtLine in dtLines {
-            let lineRange = dtLine.stringRange()
+            let lineRange = offset(dtLine.stringRange(), by: pageOffset)
             let line = RDEPUBPageLine(
                 stringRange: lineRange,
                 frame: dtLine.frame,
@@ -154,7 +155,7 @@ struct RDEPUBPageLayoutSnapshot {
 
             if let glyphRuns = dtLine.glyphRuns as? [DTCoreTextGlyphRun] {
                 for run in glyphRuns {
-                    let runRange = run.stringRange()
+                    let runRange = offset(run.stringRange(), by: pageOffset)
                     let isAttachment = run.attachment != nil
                     runs.append(
                         RDEPUBPageRun(
@@ -182,7 +183,7 @@ struct RDEPUBPageLayoutSnapshot {
             }
         }
 
-        let visibleRange = layoutFrame.visibleStringRange()
+        let visibleRange = offset(layoutFrame.visibleStringRange(), by: pageOffset)
 
         return RDEPUBPageLayoutSnapshot(
             page: page,
@@ -210,5 +211,12 @@ struct RDEPUBPageLayoutSnapshot {
             : nil
         return (placement, kind)
     }
+
+    private static func offset(_ range: NSRange, by offset: Int) -> NSRange {
+        guard range.location != NSNotFound else {
+            return range
+        }
+        return NSRange(location: range.location + offset, length: range.length)
+    }
 #endif
 }