Implemented Right-to-Left pageturn

app/src/main/java/xyz/quaver/pupil/ui/ReaderActivity.kt

@@ -441,7 +441,7 @@ class ReaderActivity : AppCompatActivity() {
             reader_recyclerview.layoutManager = LinearLayoutManager(this)
         } else {
             snapHelper.attachToRecyclerView(reader_recyclerview)
-            reader_recyclerview.layoutManager = LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false)
+            reader_recyclerview.layoutManager = LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, PreferenceManager.getDefaultSharedPreferences(this).getBoolean("rtl", false))
         }
 
         (reader_recyclerview.layoutManager as LinearLayoutManager).scrollToPositionWithOffset(currentPage-1, 0)

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

@@ -136,4 +136,5 @@
     <string name="reader_fab_retry">リトライ</string>
     <string name="reader_fab_auto">自動スクロール</string>
     <string name="search_all">全てのギャラリーを対象に検索</string>
+    <string name="settings_rtl">綴じ方向を左にする</string>
 </resources>

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

@@ -136,4 +136,5 @@
     <string name="reader_fab_retry">재시도</string>
     <string name="reader_fab_auto">자동 스크롤</string>
     <string name="search_all">모든 갤러리 검색</string>
+    <string name="settings_rtl">좌측으로 페이지 넘기기</string>
 </resources>

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

@@ -148,6 +148,7 @@
     <string name="settings_miscellaneous_title">Miscellaneous</string>
     <string name="settings_mirror_summary">Load images from mirrors</string>
     <string name="settings_proxy_title">Proxy</string>
+    <string name="settings_rtl">Turn pages Right-to-Left</string>
     <string name="settings_security_mode_title">Enable security mode</string>
     <string name="settings_security_mode_summary">Enable security mode to make the screen invisible on recent app window</string>
     <string name="settings_dark_mode_title">Dark mode</string>

app/src/main/res/xml/root_preferences.xml

@@ -80,6 +80,11 @@
             app:key="proxy"
             app:title="@string/settings_proxy_title"/>
 
+        <SwitchPreferenceCompat
+            app:key="rtl"
+            app:title="@string/settings_rtl"
+            app:defaultValue="false" />
+
         <SwitchPreferenceCompat
             app:key="security_mode"
             app:title="@string/settings_security_mode_title"