添加反转内容

app/src/main/java/io/legado/app/help/BookHelp.kt

@@ -191,6 +191,25 @@ object BookHelp {
         return null
     }
 
+    fun reverseContent(book: Book, bookChapter: BookChapter) {
+        if (!book.isLocalBook()) {
+            val file = FileUtils.getFile(
+                downloadDir,
+                cacheFolderName,
+                book.getFolderName(),
+                bookChapter.getFileName()
+            )
+            if (file.exists()) {
+                val text = file.readText()
+                val stringBuilder = StringBuilder()
+                text.toStringArray().forEach {
+                    stringBuilder.insert(0, it)
+                }
+                file.writeText(stringBuilder.toString())
+            }
+        }
+    }
+
     fun delContent(book: Book, bookChapter: BookChapter) {
         if (book.isLocalBook()) {
             return

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

@@ -242,6 +242,9 @@ class ReadBookActivity : ReadBookBaseActivity(),
                 supportFragmentManager,
                 ReadBook.book?.tocUrl
             )
+            R.id.menu_reverse_content -> ReadBook.book?.let {
+                viewModel.reverseContent(it)
+            }
             R.id.menu_set_charset -> showCharsetConfig()
             R.id.menu_get_progress -> ReadBook.book?.let {
                 viewModel.syncBookProgress(it) { progress ->

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

@@ -295,6 +295,16 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
         }
     }
 
+    fun reverseContent(book: Book) {
+        execute {
+            appDb.bookChapterDao.getChapter(book.bookUrl, ReadBook.durChapterIndex)
+                ?.let { chapter ->
+                    BookHelp.reverseContent(book, chapter)
+                    ReadBook.loadContent(ReadBook.durChapterIndex, resetPageOffset = false)
+                }
+        }
+    }
+
     /**
      * 替换规则变化
      */

app/src/main/res/menu/book_read.xml

@@ -73,6 +73,11 @@
         android:title="@string/get_book_progress"
         app:showAsAction="never" />
 
+    <item
+        android:id="@+id/menu_reverse_content"
+        android:title="@string/reverse_content"
+        app:showAsAction="never" />
+
     <item
         android:id="@+id/menu_enable_replace"
         android:title="@string/replace_rule_title"

app/src/main/res/values-zh-rHK/strings.xml

@@ -804,5 +804,6 @@
     <string name="export_folder">导出文件夹</string>
     <string name="export_charset">导出编码</string>
     <string name="export_to_web_dav">导出到WebDav</string>
+    <string name="reverse_content">反转内容</string>
 
 </resources>

app/src/main/res/values-zh-rTW/strings.xml

@@ -808,5 +808,6 @@
     <string name="export_folder">匯出資料夾</string>
     <string name="export_charset">匯出編碼</string>
     <string name="export_to_web_dav">匯出到WebDav</string>
+    <string name="reverse_content">反转内容</string>
 
 </resources>

app/src/main/res/values-zh/strings.xml

@@ -808,5 +808,6 @@
     <string name="export_folder">导出文件夹</string>
     <string name="export_charset">导出编码</string>
     <string name="export_to_web_dav">导出到WebDav</string>
+    <string name="reverse_content">反转内容</string>
 
 </resources>

app/src/main/res/values/strings.xml

@@ -811,5 +811,6 @@
     <string name="export_folder">导出文件夹</string>
     <string name="export_charset">导出编码</string>
     <string name="export_to_web_dav">导出到WebDav</string>
+    <string name="reverse_content">反转内容</string>
 
 </resources>

build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.4.30'
+    ext.kotlin_version = '1.4.31'
     repositories {
         google()
         jcenter()