Fix chapter layout

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

@@ -400,7 +400,7 @@ object ChapterProvider {
                         durY = adjustHeight // 将 Y 坐标设置为居中位置
                     }
                 }
-                
+
                 else -> {
                     if (size.width > visibleWidth) {
                         height = size.height * visibleWidth / size.width
@@ -473,7 +473,10 @@ object ChapterProvider {
     ): Pair<Int, Float> {
         var absStartX = x
         val layout = if (ReadBookConfig.useZhLayout) {
-            ZhLayout(text, textPaint, visibleWidth, emptyList(), emptyList())
+            ZhLayout(
+                text, textPaint, visibleWidth, emptyList(), emptyList(),
+                ReadBookConfig.paragraphIndent.length
+            )
         } else {
             StaticLayout(text, textPaint, visibleWidth, Layout.Alignment.ALIGN_NORMAL, 0f, 0f, true)
         }
@@ -605,7 +608,9 @@ object ChapterProvider {
         sbLength: Int
     ) {
         val lastLine = textPages.last().lines.lastOrNull { it.paragraphNum > 0 }
-            ?: textPages.getOrNull(textPages.lastIndex - 1)?.lines?.lastOrNull { it.paragraphNum > 0 }
+            ?: textPages.getOrNull(
+                textPages.lastIndex - 1
+            )?.lines?.lastOrNull { it.paragraphNum > 0 }
         val paragraphNum = when {
             lastLine == null -> 1
             lastLine.isParagraphEnd -> lastLine.paragraphNum + 1

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

@@ -72,6 +72,8 @@ class TextChapterLayout(
     private val indentCharWidth = ChapterProvider.indentCharWidth
     private val stringBuilder = StringBuilder()
 
+    private val paragraphIndent = ReadBookConfig.paragraphIndent
+
     private var pendingTextPage = TextPage()
 
     private var isCompleted = false
@@ -252,7 +254,8 @@ class TextChapterLayout(
                             contentPaint,
                             contentPaintTextHeight,
                             contentPaintFontMetrics,
-                            book.getImageStyle()
+                            book.getImageStyle(),
+                            isFirstLine = start == 0
                         ).let {
                             absStartX = it.first
                             durY = it.second
@@ -281,7 +284,8 @@ class TextChapterLayout(
                             contentPaint,
                             contentPaintTextHeight,
                             contentPaintFontMetrics,
-                            book.getImageStyle()
+                            book.getImageStyle(),
+                            isFirstLine = start == 0
                         ).let {
                             absStartX = it.first
                             durY = it.second
@@ -442,6 +446,7 @@ class TextChapterLayout(
         fontMetrics: Paint.FontMetrics,
         imageStyle: String?,
         isTitle: Boolean = false,
+        isFirstLine: Boolean = true,
         emptyContent: Boolean = false,
         isVolumeTitle: Boolean = false,
         srcList: LinkedList<String>? = null
@@ -459,7 +464,8 @@ class TextChapterLayout(
         }
         val layout = if (ReadBookConfig.useZhLayout) {
             val (words, widths) = measureTextSplit(text, widthsArray)
-            ZhLayout(text, textPaint, visibleWidth, words, widths)
+            val indentSize = if (isFirstLine) paragraphIndent.length else 0
+            ZhLayout(text, textPaint, visibleWidth, words, widths, indentSize)
         } else {
             StaticLayout(text, textPaint, visibleWidth, Layout.Alignment.ALIGN_NORMAL, 0f, 0f, true)
         }
@@ -532,7 +538,7 @@ class TextChapterLayout(
             val desiredWidth = widths.fastSum()
             textLine.text = lineText
             when {
-                lineIndex == 0 && layout.lineCount > 1 && !isTitle -> {
+                lineIndex == 0 && layout.lineCount > 1 && !isTitle && isFirstLine -> {
                     //多行的第一行 非标题
                     addCharsToLineFirst(
                         book, absStartX, textLine, words, textPaint,
@@ -638,8 +644,8 @@ class TextChapterLayout(
             )
             return
         }
-        val bodyIndent = ReadBookConfig.paragraphIndent
-        for (i in bodyIndent.indices) {
+        val bodyIndent = paragraphIndent
+        repeat(bodyIndent.length) {
             val x1 = x + indentCharWidth
             textLine.addColumn(
                 TextColumn(
@@ -708,7 +714,7 @@ class TextChapterLayout(
             }
         } else {
             val gapCount: Int = words.lastIndex
-            val d = residualWidth / gapCount
+            val d = if (gapCount > 0) residualWidth / gapCount else 0f
             textLine.extraLetterSpacingOffsetX = -d / 2
             textLine.extraLetterSpacing = d / textPaint.textSize
             var x = startX

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

@@ -18,7 +18,8 @@ class ZhLayout(
     textPaint: TextPaint,
     width: Int,
     words: List<String>,
-    widths: List<Float>
+    widths: List<Float>,
+    indentSize: Int
 ) : Layout(text, textPaint, width, Alignment.ALIGN_NORMAL, 0f, 0f) {
     companion object {
         private val postPanc = hashSetOf(
@@ -97,8 +98,9 @@ class ZhLayout(
                 /*特殊标点使用难保证显示效果，所以不考虑间隔，直接查找到能满足条件的分割字*/
                 var breakLength = 0
                 if (reCheck && index > 2) {
+                    val startPos = if (line == 0) indentSize else getLineStart(line)
                     breakMod = BreakMod.NORMAL
-                    for (i in (index) downTo 1) {
+                    for (i in (index) downTo 1 + startPos) {
                         if (i == index) {
                             breakIndex = 0
                             cwPre = 0f