Setting webtoon view background to always black

closes #262

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

@@ -459,6 +459,14 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>(),
         viewer = newViewer
         viewer_container.addView(newViewer.getView())
 
+        viewer_container.setBackgroundColor(
+            if (viewer is WebtoonViewer) {
+                Color.BLACK
+            } else {
+                getResourceColor(android.R.attr.colorBackground)
+            }
+        )
+
         toolbar.title = manga.title
 
         page_seekbar.isRTL = newViewer is R2LPagerViewer

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

@@ -92,12 +92,8 @@ class ReaderSettingsSheet(private val activity: ReaderActivity) :
             is WebtoonViewer -> initWebtoonPreferences()
         }
 
-        val bottomEdgeView = when (activity.viewer is PagerViewer) {
-            true -> page_transitions
-            false -> webtoon_side_padding
-        }
-
-        setBottomEdge(bottomEdgeView, activity)
+        setBottomEdge(page_transitions, activity)
+        setBottomEdge(webtoon_side_padding, activity)
 
         close_button.setOnClickListener {
             dismiss()
@@ -117,6 +113,13 @@ class ReaderSettingsSheet(private val activity: ReaderActivity) :
     private fun initGeneralPreferences() {
         viewer.onItemSelectedListener = IgnoreFirstSpinnerListener { position ->
             activity.presenter.setMangaViewer(position)
+
+            val mangaViewer = activity.presenter.getMangaViewer()
+            if (mangaViewer == ReaderActivity.WEBTOON || mangaViewer == ReaderActivity.VERTICAL_PLUS) {
+                initWebtoonPreferences()
+            } else {
+                initPagerPreferences()
+            }
         }
         viewer.setSelection(activity.presenter.manga?.viewer ?: 0, false)
 

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

@@ -1,5 +1,6 @@
 package eu.kanade.tachiyomi.ui.reader.viewer.webtoon
 
+import android.graphics.Color
 import android.graphics.Typeface
 import android.text.SpannableStringBuilder
 import android.text.Spanned
@@ -38,6 +39,7 @@ class WebtoonTransitionHolder(
      */
     private var textView = TextView(context).apply {
         textSize = 17.5F
+        setTextColor(Color.WHITE)
         wrapContent()
     }
 

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

@@ -1,5 +1,6 @@
 package eu.kanade.tachiyomi.ui.reader.viewer.webtoon
 
+import android.graphics.Color
 import android.view.KeyEvent
 import android.view.MotionEvent
 import android.view.View
@@ -64,6 +65,7 @@ class WebtoonViewer(val activity: ReaderActivity, val isContinuous: Boolean = tr
     val subscriptions = CompositeSubscription()
 
     init {
+        recycler.setBackgroundColor(Color.BLACK)
         recycler.visibility = View.GONE // Don't let the recycler layout yet
         recycler.layoutParams = ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT)
         recycler.itemAnimator = null

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

@@ -81,6 +81,7 @@
                 app:layout_constraintTop_toBottomOf="@id/viewer" />
 
             <TextView
+                android:id="@+id/background_color_label"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
                 android:text="@string/background_color"
@@ -272,7 +273,7 @@
                 android:layout_height="wrap_content"
                 android:visibility="gone"
                 app:constraint_referenced_ids="pager_prefs,scale_type,scale_type_text,
-                zoom_start_text,zoom_start,crop_borders,page_transitions"
+                zoom_start_text,zoom_start,crop_borders,page_transitions,background_color,background_color_label"
                 tools:visibility="visible" />
 
             <androidx.constraintlayout.widget.Group