修复滚动模式下，长按选择错乱问题

app/src/main/java/io/legado/app/ui/book/read/page/ContentTextView.kt

@@ -524,7 +524,7 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
         }
     }
 
-    private fun relativePage(relativePos: Int): TextPage {
+    fun relativePage(relativePos: Int): TextPage {
         return when (relativePos) {
             0 -> textPage
             1 -> pageFactory.nextPage

app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt

@@ -271,6 +271,10 @@ class PageView(context: Context) : FrameLayout(context) {
         return binding.contentTextView.createBookmark()
     }
 
+    fun relativePage(relativePos: Int): TextPage {
+        return binding.contentTextView.relativePage(relativePos)
+    }
+
     val selectedText: String get() = binding.contentTextView.selectedText
 
     val textPage get() = binding.contentTextView.textPage

app/src/main/java/io/legado/app/ui/book/read/page/ReadView.kt

@@ -265,8 +265,9 @@ class ReadView(context: Context, attrs: AttributeSet) :
      */
     private fun onLongPress() {
         kotlin.runCatching {
-            with(curPage.textPage) {
             curPage.selectText(startX, startY) { relativePage, lineIndex, charIndex ->
+                val page = if (isScroll) curPage.relativePage(relativePage) else curPage.textPage
+                with(page) {
                     isTextSelected = true
                     firstRelativePage = relativePage
                     firstLineIndex = lineIndex