feat: 优化代码

app/src/main/java/io/legado/app/model/localBook/AnalyzeTxtFile.kt

@@ -193,15 +193,18 @@ object AnalyzeTxtFile {
     }
 
     private fun getBookFile(context: Context, book: Book): File {
-        val uri = Uri.parse(book.bookUrl)
-        val bookFile = FileUtils.getFile(cacheFolder, book.originName, subDirs = *arrayOf())
-        if (!bookFile.exists()) {
-            bookFile.createNewFile()
-            DocumentUtils.readBytes(context, uri)?.let {
-                bookFile.writeBytes(it)
+        if (book.bookUrl.isContentPath()) {
+            val uri = Uri.parse(book.bookUrl)
+            val bookFile = FileUtils.getFile(cacheFolder, book.originName, subDirs = *arrayOf())
+            if (!bookFile.exists()) {
+                bookFile.createNewFile()
+                DocumentUtils.readBytes(context, uri)?.let {
+                    bookFile.writeBytes(it)
+                }
             }
+            return bookFile
         }
-        return bookFile
+        return File(book.bookUrl)
     }
 
     private fun getTocRule(book: Book, bookStream: RandomAccessFile, charset: Charset): Pattern? {