Add icons for reading mode toggle

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt

@@ -343,7 +343,7 @@ class ReaderActivity : BaseRxActivity<ReaderActivityBinding, ReaderPresenter>()
         }
 
         binding.actionReaderMode.setOnClickListener {
-            val newReadingMode = ReadingModeType.getNextReadingMode(presenter.manga?.viewer ?: 0)
+            val newReadingMode = ReadingModeType.getNextReadingMode(presenter.getMangaViewer(resolveDefault = false))
             presenter.setMangaViewer(newReadingMode.prefValue)
 
             menuToggleToast?.cancel()
@@ -464,12 +464,16 @@ class ReaderActivity : BaseRxActivity<ReaderActivityBinding, ReaderPresenter>()
      */
     fun setManga(manga: Manga) {
         val prevViewer = viewer
+
+        val viewerMode = ReadingModeType.fromPreference(presenter.getMangaViewer(resolveDefault = false))
+        binding.actionReaderMode.setImageResource(viewerMode.iconRes)
+
         val newViewer = when (presenter.getMangaViewer()) {
-            ReadingModeType.RIGHT_TO_LEFT.prefValue -> R2LPagerViewer(this)
+            ReadingModeType.LEFT_TO_RIGHT.prefValue -> L2RPagerViewer(this)
             ReadingModeType.VERTICAL.prefValue -> VerticalPagerViewer(this)
             ReadingModeType.WEBTOON.prefValue -> WebtoonViewer(this)
             ReadingModeType.CONTINUOUS_VERTICAL.prefValue -> WebtoonViewer(this, isContinuous = false)
-            else -> L2RPagerViewer(this)
+            else -> R2LPagerViewer(this)
         }
 
         // Destroy previous viewer if there was one

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt

@@ -489,9 +489,9 @@ class ReaderPresenter(
     /**
      * Returns the viewer position used by this manga or the default one.
      */
-    fun getMangaViewer(): Int {
+    fun getMangaViewer(resolveDefault: Boolean = true): Int {
         val manga = manga ?: return preferences.defaultViewer()
-        return if (manga.viewer == 0) preferences.defaultViewer() else manga.viewer
+        return if (resolveDefault && manga.viewer == 0) preferences.defaultViewer() else manga.viewer
     }
 
     /**

app/src/main/java/eu/kanade/tachiyomi/ui/reader/setting/ReadingModeType.kt

@@ -1,16 +1,17 @@
 package eu.kanade.tachiyomi.ui.reader.setting
 
+import androidx.annotation.DrawableRes
 import androidx.annotation.StringRes
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.util.lang.next
 
-enum class ReadingModeType(val prefValue: Int, @StringRes val stringRes: Int) {
-    DEFAULT(0, R.string.default_viewer),
-    LEFT_TO_RIGHT(1, R.string.left_to_right_viewer),
-    RIGHT_TO_LEFT(2, R.string.right_to_left_viewer),
-    VERTICAL(3, R.string.vertical_viewer),
-    WEBTOON(4, R.string.webtoon_viewer),
-    CONTINUOUS_VERTICAL(5, R.string.vertical_plus_viewer),
+enum class ReadingModeType(val prefValue: Int, @StringRes val stringRes: Int, @DrawableRes val iconRes: Int) {
+    DEFAULT(0, R.string.default_viewer, R.drawable.ic_reader_default_24dp),
+    LEFT_TO_RIGHT(1, R.string.left_to_right_viewer, R.drawable.ic_reader_ltr_24dp),
+    RIGHT_TO_LEFT(2, R.string.right_to_left_viewer, R.drawable.ic_reader_rtl_24dp),
+    VERTICAL(3, R.string.vertical_viewer, R.drawable.ic_reader_vertical_24dp),
+    WEBTOON(4, R.string.webtoon_viewer, R.drawable.ic_reader_webtoon_24dp),
+    CONTINUOUS_VERTICAL(5, R.string.vertical_plus_viewer, R.drawable.ic_reader_continuous_vertical_24dp),
     ;
 
     companion object {

app/src/main/res/drawable/ic_reader_continuous_vertical_24dp.xml

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M17.3159,1h-10a2.0059,2.0059 0,0 0,-2 2L5.3159,21a2.0059,2.0059 0,0 0,2 2h10a2.0059,2.0059 0,0 0,2 -2L19.3159,3A2.0059,2.0059 0,0 0,17.3159 1ZM17.3159,21h-10L7.3159,3h10Z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M11.3083,5h2v5.5h-2z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M15.308,16l-2,0l0,-4.5l-2,0l0,4.5l-2,0l3,3l3,-3z" />
+</vector>

app/src/main/res/drawable/ic_reader_default_24dp.xml

@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M6.9906,18L6.9906,6h12L18.9906,3a2.0059,2.0059 0,0 0,-2 -2h-10a2.0059,2.0059 0,0 0,-2 2L4.9906,21a2.0059,2.0059 0,0 0,2 2h10a2.0059,2.0059 0,0 0,2 -2L18.9906,18h-12ZM6.9906,3h10L16.9906,4h-10ZM16.9906,21h-10L6.9906,20h10Z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M21.7706,12.44l-0.02,0.03a3.5546,3.5546 0,0 0,0.05 -0.47,3.9031 3.9031,0 0,0 -0.05,-0.48l0.02,0.03 0.85,-0.68a0.5068,0.5068 0,0 0,0.12 -0.64l-0.84,-1.46a0.4986,0.4986 0,0 0,-0.61 -0.22l-1.01,0.39 0.0099,0.04a3.6135,3.6135 0,0 0,-0.8 -0.48l-0.17,-1.07a0.4879,0.4879 0,0 0,-0.49 -0.43h-1.68a0.4876,0.4876 0,0 0,-0.49 0.42l-0.17,1.08a3.6149,3.6149 0,0 0,-0.8 0.48l0.02,-0.03 -1.01,-0.39a0.4878,0.4878 0,0 0,-0.61 0.22l-0.84,1.46a0.5068,0.5068 0,0 0,0.12 0.64l0.85,0.68 0.02,-0.03a3.9148,3.9148 0,0 0,-0.05 0.48,3.915 3.915,0 0,0 0.05,0.48l-0.02,-0.03 -0.85,0.68a0.5068,0.5068 0,0 0,-0.12 0.64l0.84,1.46a0.4985,0.4985 0,0 0,0.61 0.22l1.01,-0.39 -0.02,-0.03a4.4991,4.4991 0,0 0,0.8 0.46l0.17,1.08a0.4876,0.4876 0,0 0,0.49 0.42h1.68a0.4876,0.4876 0,0 0,0.49 -0.42l0.17,-1.08a3.6138,3.6138 0,0 0,0.8 -0.48l-0.02,0.03 1.02,0.39a0.4879,0.4879 0,0 0,0.61 -0.22l0.84,-1.46a0.5068,0.5068 0,0 0,-0.12 -0.64ZM17.9906,14a2,2 0,1 1,2 -2A2.0059,2.0059 0,0 1,17.9906 14Z" />
+</vector>

app/src/main/res/drawable/ic_reader_ltr_24dp.xml

@@ -0,0 +1,21 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M17.3159,18h-10L7.3159,16h-2v5a2.0059,2.0059 0,0 0,2 2h10a2.0059,2.0059 0,0 0,2 -2L19.3159,16h-2ZM17.3159,21h-10L7.3159,20h10Z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M7.3159,6h10L17.3159,8h2L19.3159,3a2.0059,2.0059 0,0 0,-2 -2h-10a2.0059,2.0059 0,0 0,-2 2L5.3159,8h2ZM7.3159,3h10L17.3159,4h-10Z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M22.311,12l-3,-3l0,2l-11.99,0l0,2l11.99,0l0,2l3,-3z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M2.3206,11h1.5v2h-1.5z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M4.8206,11h1.5v2h-1.5z" />
+</vector>

app/src/main/res/drawable/ic_reader_rtl_24dp.xml

@@ -0,0 +1,21 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M7,6H17V8h2V3a2.0059,2.0059 0,0 0,-2 -2H7A2.0059,2.0059 0,0 0,5 3V8H7ZM7,3H17V4H7Z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M17,18L7,18L7,16L5,16v5a2.0059,2.0059 0,0 0,2 2L17,23a2.0059,2.0059 0,0 0,2 -2L19,16L17,16ZM17,21L7,21L7,20L17,20Z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M5.005,13l11.99,0l0,-2l-11.99,0l0,-2l-3,3l3,3l0,-2z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M20.4953,11h1.5v2h-1.5z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M17.9953,11h1.5v2h-1.5z" />
+</vector>

app/src/main/res/drawable/ic_reader_vertical_24dp.xml

@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M17,1L7,1A2.0059,2.0059 0,0 0,5 3L5,21a2.0059,2.0059 0,0 0,2 2L17,23a2.0059,2.0059 0,0 0,2 -2L19,3A2.0059,2.0059 0,0 0,17 1ZM17,3v1.0462L7,4.0462L7,3ZM17,6.0462v12L7,18.0462v-12ZM7,21v-0.9538L17,20.0462L17,21Z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M9,13l3,3l3,-3l-2,0l0,-5l-2,0l0,5l-2,0z" />
+</vector>

app/src/main/res/drawable/ic_reader_webtoon_24dp.xml

@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M11.992,19l3,-3l-2,0l0,-11l-2,0l0,11l-2,0l3,3z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:pathData="M17,1L7,1A2.0059,2.0059 0,0 0,5 3L5,21a2.0059,2.0059 0,0 0,2 2L17,23a2.0059,2.0059 0,0 0,2 -2L19,3A2.0059,2.0059 0,0 0,17 1ZM17,21L7,21L7,3L17,3Z" />
+</vector>

app/src/main/res/layout/reader_activity.xml

@@ -155,7 +155,7 @@
                     app:layout_constraintEnd_toStartOf="@id/action_rotation"
                     app:layout_constraintStart_toStartOf="parent"
                     app:layout_constraintTop_toTopOf="parent"
-                    app:srcCompat="@drawable/ic_book_24dp"
+                    app:srcCompat="@drawable/ic_reader_default_24dp"
                     app:tint="?attr/colorOnPrimary" />
 
                 <ImageButton