move windowInset check for bottom into extension

app/src/main/java/eu/kanade/tachiyomi/ui/manga/track/TrackSearchDialog.kt

@@ -4,8 +4,6 @@ import android.app.Dialog
 import android.os.Bundle
 import android.view.View
 import com.afollestad.materialdialogs.MaterialDialog
-import com.afollestad.materialdialogs.WhichButton
-import com.afollestad.materialdialogs.actions.setActionButtonEnabled
 import com.afollestad.materialdialogs.customview.customView
 import com.jakewharton.rxbinding.widget.itemClicks
 import com.jakewharton.rxbinding.widget.textChanges

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

@@ -183,7 +183,6 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>(),
             false -> reader_layout.systemUiVisibility.rem(systemUiFlag)
         }
 
-
         if (presenter.needsInit()) {
             val manga = intent.extras!!.getLong("manga", -1)
             val chapter = intent.extras!!.getLong("chapter", -1)

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

@@ -7,7 +7,6 @@ import android.view.View
 import android.widget.FrameLayout
 import android.widget.ImageView
 import android.widget.TextView
-import androidx.core.content.ContextCompat
 import com.mikepenz.fastadapter.FastAdapter
 import com.mikepenz.fastadapter.items.AbstractItem
 import eu.kanade.tachiyomi.R

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

@@ -3,7 +3,6 @@ package eu.kanade.tachiyomi.ui.reader
 import android.content.Context
 import android.content.res.ColorStateList
 import android.graphics.Color
-import android.os.Build
 import android.util.AttributeSet
 import android.view.View
 import android.widget.LinearLayout
@@ -16,6 +15,7 @@ import com.mikepenz.fastadapter.adapters.ItemAdapter
 import com.mikepenz.fastadapter.listeners.ClickEventHook
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.util.system.dpToPx
+import eu.kanade.tachiyomi.util.system.getBottomInsets
 import eu.kanade.tachiyomi.util.system.getResourceColor
 import eu.kanade.tachiyomi.util.system.launchUI
 import eu.kanade.tachiyomi.util.view.doOnApplyWindowInsets
@@ -43,20 +43,24 @@ class ReaderChapterSheet @JvmOverloads constructor(context: Context, attrs: Attr
 
         sheetBehavior = BottomSheetBehavior.from(this)
         chapters_button.setOnClickListener {
-            if (sheetBehavior?.state == BottomSheetBehavior.STATE_EXPANDED) sheetBehavior?.state =
+            if (sheetBehavior?.state == BottomSheetBehavior.STATE_EXPANDED) {
-                BottomSheetBehavior.STATE_COLLAPSED
+                sheetBehavior?.state = BottomSheetBehavior.STATE_COLLAPSED
-            else sheetBehavior?.state = BottomSheetBehavior.STATE_EXPANDED
+            } else {
+                sheetBehavior?.state = BottomSheetBehavior.STATE_EXPANDED
+            }
         }
+
         val peek = sheetBehavior?.peekHeight ?: 30.dpToPx
         post {
-            chapter_recycler.alpha =
+            chapter_recycler.alpha = when (sheetBehavior?.state == BottomSheetBehavior.STATE_EXPANDED) {
-                if (sheetBehavior?.state == BottomSheetBehavior.STATE_EXPANDED) 1f else 0f
+                true -> 1f
+                false -> 0f
+            }
         }
 
         chapters_bottom_sheet.doOnApplyWindowInsets { _, insets, _ ->
-            sheetBehavior?.peekHeight =
+            sheetBehavior?.peekHeight = peek + insets.getBottomInsets()
-                peek + if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) insets.mandatorySystemGestureInsets.bottom
+
-                else insets.systemWindowInsetBottom
             chapters_bottom_sheet.updateLayoutParams<MarginLayoutParams> {
                 height = 280.dpToPx + insets.systemWindowInsetBottom
             }

app/src/main/java/eu/kanade/tachiyomi/util/system/WindowInsetsExtensions.kt

@@ -0,0 +1,13 @@
+package eu.kanade.tachiyomi.util.system
+
+import android.annotation.SuppressLint
+import android.os.Build
+import android.view.WindowInsets
+
+@SuppressLint("NewApi")
+fun WindowInsets.getBottomInsets(): Int {
+    return when (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+        true -> mandatorySystemGestureInsets.bottom
+        false -> systemWindowInsetBottom
+    }
+}