修复崩溃bug

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

@@ -784,7 +784,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
         super.onActivityResult(requestCode, resultCode, data)
         if (resultCode == Activity.RESULT_OK) {
             when (requestCode) {
-                requestCodeEditSource -> viewModel.upBookSource() {
+                requestCodeEditSource -> viewModel.upBookSource {
                     upView()
                 }
                 requestCodeChapterList ->

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

@@ -347,8 +347,8 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
         selectStart[0] = relativePage
         selectStart[1] = lineIndex
         selectStart[2] = charIndex
-        val textLine = relativePage(relativePage).textLines[lineIndex]
-        val textChar = textLine.textChars[charIndex]
+        val textLine = relativePage(relativePage).getLine(lineIndex)
+        val textChar = textLine.getTextChar(charIndex)
         upSelectedStart(
             textChar.start,
             textLine.lineBottom + relativeOffset(relativePage),
@@ -364,8 +364,8 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
         selectEnd[0] = relativePage
         selectEnd[1] = lineIndex
         selectEnd[2] = charIndex
-        val textLine = relativePage(relativePage).textLines[lineIndex]
-        val textChar = textLine.textChars[charIndex]
+        val textLine = relativePage(relativePage).getLine(lineIndex)
+        val textChar = textLine.getTextChar(lineIndex)
         upSelectedEnd(textChar.end, textLine.lineBottom + relativeOffset(relativePage))
         upSelectChars()
     }

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

@@ -28,8 +28,10 @@ data class TextLine(
         textChars.add(TextChar(charData, start = start, end = end))
     }
 
-    fun getTextCharAt(index: Int): TextChar {
-        return textChars[index]
+    fun getTextChar(index: Int): TextChar {
+        return textChars.getOrElse(index) {
+            textChars.last()
+        }
     }
 
     fun getTextCharReverseAt(index: Int): TextChar {

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

@@ -25,6 +25,12 @@ data class TextPage(
     val lineSize get() = textLines.size
     val charSize get() = text.length
 
+    fun getLine(index: Int): TextLine {
+        return textLines.getOrElse(index) {
+            textLines.last()
+        }
+    }
+
     fun upLinesPosition() = ChapterProvider.apply {
         if (!ReadBookConfig.textBottomJustify) return@apply
         if (textLines.size <= 1) return@apply