优化

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

@@ -446,7 +446,10 @@ class TextChapterLayout(
             val textLine = TextLine(isTitle = isTitle)
             if (durY + textHeight > visibleHeight) {
                 val textPage = pendingTextPage
-                textPage.height = textPage.lines.lastOrNull()?.lineBottom ?: 0f
+                val height = textPage.lines.lastOrNull()?.lineBottom ?: 0f
+                if (textPage.height < height) {
+                    textPage.height = height
+                }
                 if (doublePage && absStartX < viewWidth / 2) {
                     //当前页面左列结束
                     textPage.leftLineSize = textPage.lineSize
@@ -528,8 +531,9 @@ class TextChapterLayout(
             val textPage = pendingTextPage
             textPage.addLine(textLine)
             durY += textHeight * lineSpacingExtra
-            if (textPage.height < durY) {
-                textPage.height = durY
+            val height = textPage.lines.lastOrNull()?.lineBottom ?: 0f
+            if (textPage.height < height) {
+                textPage.height = height
             }
         }
         durY += textHeight * paragraphSpacing / 10f