优化

app/src/main/java/io/legado/app/ui/book/read/config/ReadStyleDialog.kt

@@ -123,7 +123,7 @@ class ReadStyleDialog : BaseDialogFragment(R.layout.dialog_read_book_style),
                 items = resources.getStringArray(R.array.indent).toList()
             ) { _, index ->
                 ReadBookConfig.paragraphIndent = "　".repeat(index)
-                postEvent(EventBus.UP_CONFIG, arrayListOf(5))
+                postEvent(EventBus.UP_CONFIG, arrayListOf(8, 5))
             }
         }
         tvPadding.setOnClickListener {

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

@@ -864,11 +864,15 @@ object ChapterProvider {
         titleTopSpacing = ReadBookConfig.titleTopSpacing.dpToPx()
         titleBottomSpacing = ReadBookConfig.titleBottomSpacing.dpToPx()
         val bodyIndent = ReadBookConfig.paragraphIndent
-        var indentWidth = StaticLayout.getDesiredWidth(bodyIndent, contentPaint)
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.VANILLA_ICE_CREAM) {
-            indentWidth += contentPaint.letterSpacing * contentPaint.textSize
+        indentCharWidth = if (bodyIndent.isNotEmpty()) {
+            var indentWidth = StaticLayout.getDesiredWidth(bodyIndent, contentPaint)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.VANILLA_ICE_CREAM) {
+                indentWidth += contentPaint.letterSpacing * contentPaint.textSize
+            }
+            indentWidth / bodyIndent.length
+        } else {
+            0f
         }
-        indentCharWidth = indentWidth / bodyIndent.length
         titlePaintTextHeight = titlePaint.textHeight
         contentPaintTextHeight = contentPaint.textHeight
         titlePaintFontMetrics = titlePaint.fontMetrics

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

@@ -73,6 +73,10 @@ class TextChapterLayout(
     private val stringBuilder = StringBuilder()
 
     private val paragraphIndent = ReadBookConfig.paragraphIndent
+    private val titleMode = ReadBookConfig.titleMode
+    private val useZhLayout = ReadBookConfig.useZhLayout
+    private val isMiddleTitle = ReadBookConfig.isMiddleTitle
+    private val textFullJustify = ReadBookConfig.textFullJustify
 
     private var pendingTextPage = TextPage()
 
@@ -196,7 +200,7 @@ class TextChapterLayout(
         val isSingleImageStyle = imageStyle.equals(Book.imgStyleSingle, true)
         val isTextImageStyle = imageStyle.equals(Book.imgStyleText, true)
 
-        if (ReadBookConfig.titleMode != 2 || bookChapter.isVolume || contents.isEmpty()) {
+        if (titleMode != 2 || bookChapter.isVolume || contents.isEmpty()) {
             //标题非隐藏
             displayTitle.splitNotBlank("\n").forEach { text ->
                 setTypeText(
@@ -406,7 +410,7 @@ class TextChapterLayout(
     ) {
         val widthsArray = allocateFloatArray(text.length)
         textPaint.getTextWidthsCompat(text, widthsArray)
-        val layout = if (ReadBookConfig.useZhLayout) {
+        val layout = if (useZhLayout) {
             val (words, widths) = measureTextSplit(text, widthsArray)
             val indentSize = if (isFirstLine) paragraphIndent.length else 0
             ZhLayout(text, textPaint, visibleWidth, words, widths, indentSize)
@@ -471,7 +475,7 @@ class TextChapterLayout(
                     //标题x轴居中
                     val startX = if (
                         isTitle &&
-                        (ReadBookConfig.isMiddleTitle || emptyContent || isVolumeTitle
+                        (isMiddleTitle || emptyContent || isVolumeTitle
                                 || imageStyle?.uppercase() == Book.imgStyleSingle)
                     ) {
                         (visibleWidth - desiredWidth) / 2
@@ -487,7 +491,7 @@ class TextChapterLayout(
                 else -> {
                     if (
                         isTitle &&
-                        (ReadBookConfig.isMiddleTitle || emptyContent || isVolumeTitle
+                        (isMiddleTitle || emptyContent || isVolumeTitle
                                 || imageStyle?.uppercase() == Book.imgStyleSingle)
                     ) {
                         //标题居中
@@ -556,7 +560,7 @@ class TextChapterLayout(
         srcList: LinkedList<String>?
     ) {
         var x = 0f
-        if (!ReadBookConfig.textFullJustify) {
+        if (!textFullJustify) {
             addCharsToLineNatural(
                 book, absStartX, textLine, words,
                 x, true, textWidths, srcList
@@ -603,7 +607,7 @@ class TextChapterLayout(
         textWidths: List<Float>,
         srcList: LinkedList<String>?
     ) {
-        if (!ReadBookConfig.textFullJustify) {
+        if (!textFullJustify) {
             addCharsToLineNatural(
                 book, absStartX, textLine, words,
                 startX, false, textWidths, srcList
@@ -664,7 +668,7 @@ class TextChapterLayout(
         textWidths: List<Float>,
         srcList: LinkedList<String>?
     ) {
-        val indentLength = ReadBookConfig.paragraphIndent.length
+        val indentLength = paragraphIndent.length
         var x = startX
         textLine.startX = absStartX + startX
         for (index in words.indices) {