Copy enable/disable zoom out in webtoon reader from J2k

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt

@@ -276,4 +276,6 @@ object PreferenceKeys {
     const val hitomiAlwaysWebp = "hitomi_always_webp"
 
     const val enhancedEHentaiView = "enhanced_e_hentai_view"
+
+    const val webtoonEnableZoomOut = "webtoon_enable_zoom_out"
 }

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt

@@ -380,4 +380,6 @@ class PreferencesHelper(val context: Context) {
     fun hitomiAlwaysWebp() = flowPrefs.getBoolean(Keys.hitomiAlwaysWebp, true)
 
     fun enhancedEHentaiView() = flowPrefs.getBoolean(Keys.enhancedEHentaiView, true)
+
+    fun webtoonEnableZoomOut() = flowPrefs.getBoolean(Keys.webtoonEnableZoomOut, false)
 }

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

@@ -104,6 +104,9 @@ class ReaderSettingsSheet(private val activity: ReaderActivity) : BottomSheetDia
 
         binding.cropBordersWebtoon.bindToPreference(preferences.cropBordersWebtoon())
         binding.webtoonSidePadding.bindToIntPreference(preferences.webtoonSidePadding(), R.array.webtoon_side_padding_values)
+        // SY -->
+        binding.zoomOutWebtoon.bindToPreference(preferences.webtoonEnableZoomOut())
+        // SY <--
     }
 
     /**

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonConfig.kt

@@ -16,11 +16,21 @@ class WebtoonConfig(preferences: PreferencesHelper = Injekt.get()) : ViewerConfi
     var sidePadding = 0
         private set
 
+    // SY -->
+    var enableZoomOut = false
+        private set
+    var zoomPropertyChangedListener: ((Boolean) -> Unit)? = null
+    // SY <--
     init {
         preferences.cropBordersWebtoon()
             .register({ imageCropBorders = it }, { imagePropertyChangedListener?.invoke() })
 
         preferences.webtoonSidePadding()
             .register({ sidePadding = it }, { imagePropertyChangedListener?.invoke() })
+
+        // SY -->
+        preferences.webtoonEnableZoomOut()
+            .register({ enableZoomOut = it }, { zoomPropertyChangedListener?.invoke(it) })
+        // SY <--
     }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonFrame.kt

@@ -25,6 +25,14 @@ class WebtoonFrame(context: Context) : FrameLayout(context) {
      */
     private val flingDetector = GestureDetector(context, FlingListener())
 
+    // SY -->
+    var enableZoomOut = false
+        set(value) {
+            field = value
+            recycler?.canZoomOut = value
+        }
+    // SY <--
+
     /**
      * Recycler view added in this frame.
      */

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonRecyclerView.kt

@@ -33,6 +33,18 @@ open class WebtoonRecyclerView @JvmOverloads constructor(
     private var firstVisibleItemPosition = 0
     private var lastVisibleItemPosition = 0
     private var currentScale = DEFAULT_RATE
+    // SY -->
+    var canZoomOut = false
+        set(value) {
+            field = value
+            if (!value) {
+                zoom(currentScale, DEFAULT_RATE, x, 0f, y, 0f)
+            }
+        }
+
+    private val minRate
+        get() = if (canZoomOut) MIN_RATE else DEFAULT_RATE
+    // SY <--
 
     private val listener = GestureListener()
     private val detector = Detector()
@@ -163,7 +175,9 @@ open class WebtoonRecyclerView @JvmOverloads constructor(
     fun onScale(scaleFactor: Float) {
         currentScale *= scaleFactor
         currentScale = currentScale.coerceIn(
-            MIN_RATE,
+            // SY -->
+            minRate,
+            // SY <--
             MAX_SCALE_RATE
         )
 
@@ -190,8 +204,8 @@ open class WebtoonRecyclerView @JvmOverloads constructor(
     }
 
     fun onScaleEnd() {
-        if (scaleX < MIN_RATE) {
+        if (scaleX < /* SY --> */ minRate /* SY <-- */) {
-            zoom(currentScale, MIN_RATE, x, 0f, y, 0f)
+            zoom(currentScale, /* SY --> */ minRate /* SY <-- */, x, 0f, y, 0f)
         }
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonViewer.kt

@@ -139,6 +139,12 @@ class WebtoonViewer(val activity: ReaderActivity, val isContinuous: Boolean = tr
             refreshAdapter()
         }
 
+        // SY -->
+        config.zoomPropertyChangedListener = {
+            frame.enableZoomOut = it
+        }
+        // SY <--
+
         frame.layoutParams = ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT)
         frame.addView(recycler)
     }

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

@@ -294,6 +294,11 @@ class SettingsReaderController : SettingsController() {
                 titleRes = R.string.pref_crop_borders
                 defaultValue = false
             }
+            switchPreference {
+                key = Keys.webtoonEnableZoomOut
+                titleRes = R.string.enable_zoom_out
+                defaultValue = false
+            }
         }
 
         preferenceCategory {

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

@@ -343,6 +343,14 @@
         android:textColor="?android:attr/textColorSecondary"
         app:layout_constraintTop_toBottomOf="@id/webtoon_side_padding" />
 
+    <com.google.android.material.switchmaterial.SwitchMaterial
+        android:id="@+id/zoom_out_webtoon"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/enable_zoom_out"
+        android:textColor="?android:attr/textColorSecondary"
+        app:layout_constraintTop_toBottomOf="@id/crop_borders_webtoon" />
+
     <!-- Groups of preferences -->
 
     <androidx.constraintlayout.widget.Group