Reinstate elevation overlay (#6243)

* Theme default elevation overlay

* Fix app bar elevation overlay

Elevation overlay is disabled when tabs are visible

* Remove custom elevation overlay in tracking sheet item

* upsi

app/src/main/java/com/google/android/material/appbar/TachiyomiAppBarLayout.kt

@@ -1,4 +1,4 @@
-package eu.kanade.tachiyomi.widget
+package com.google.android.material.appbar
 
 import android.animation.AnimatorSet
 import android.animation.ValueAnimator
@@ -11,9 +11,6 @@ import androidx.coordinatorlayout.widget.CoordinatorLayout
 import androidx.lifecycle.coroutineScope
 import androidx.lifecycle.findViewTreeLifecycleOwner
 import com.google.android.material.animation.AnimationUtils
-import com.google.android.material.appbar.AppBarLayout
-import com.google.android.material.appbar.HideToolbarOnScrollBehavior
-import com.google.android.material.appbar.MaterialToolbar
 import com.google.android.material.shape.MaterialShapeDrawable
 import com.google.android.material.shape.getStateAlpha
 import eu.kanade.tachiyomi.R
@@ -23,7 +20,12 @@ import kotlinx.coroutines.flow.onEach
 import reactivecircus.flowbinding.android.view.HierarchyChangeEvent
 import reactivecircus.flowbinding.android.view.hierarchyChangeEvents
 
-class ElevationAppBarLayout @JvmOverloads constructor(
+/**
+ * [AppBarLayout] with our own lift state handler and custom title alpha.
+ *
+ * Inside this package to access some package-private methods.
+ */
+class TachiyomiAppBarLayout @JvmOverloads constructor(
     context: Context,
     attrs: AttributeSet? = null
 ) : AppBarLayout(context, attrs) {
@@ -50,8 +52,8 @@ class ElevationAppBarLayout @JvmOverloads constructor(
     private var statusBarForegroundAnimator: ValueAnimator? = null
     private val offsetListener = OnOffsetChangedListener { appBarLayout, verticalOffset ->
         // Show status bar foreground when offset
-        val foreground = appBarLayout?.statusBarForeground ?: return@OnOffsetChangedListener
-        val start = foreground.alpha
+        val foreground = (appBarLayout?.statusBarForeground as? MaterialShapeDrawable) ?: return@OnOffsetChangedListener
+        val start = foreground.getStateAlpha()
         val end = if (verticalOffset != 0) 255 else 0
 
         statusBarForegroundAnimator?.cancel()
@@ -82,7 +84,7 @@ class ElevationAppBarLayout @JvmOverloads constructor(
     override fun getBehavior(): CoordinatorLayout.Behavior<AppBarLayout> = HideToolbarOnScrollBehavior()
 
     /**
-     * Disabled. Lift on scroll is handled manually with [TachiyomiCoordinatorLayout]
+     * Disabled. Lift on scroll is handled manually with [eu.kanade.tachiyomi.widget.TachiyomiCoordinatorLayout]
      */
     override fun isLiftOnScroll(): Boolean = false
 
@@ -98,6 +100,8 @@ class ElevationAppBarLayout @JvmOverloads constructor(
         }
     }
 
+    override fun setLiftedState(lifted: Boolean, force: Boolean): Boolean = false
+
     override fun onAttachedToWindow() {
         super.onAttachedToWindow()
         addOnOffsetChangedListener(offsetListener)
@@ -143,6 +147,7 @@ class ElevationAppBarLayout @JvmOverloads constructor(
             ValueAnimator.ofFloat(fromElevation, toElevation).apply {
                 addUpdateListener {
                     elevation = it.animatedValue as Float
+                    (statusBarForeground as? MaterialShapeDrawable)?.elevation = it.animatedValue as Float
                 }
                 animators.add(this)
             }
@@ -171,4 +176,8 @@ class ElevationAppBarLayout @JvmOverloads constructor(
             }
         }
     }
+
+    init {
+        statusBarForeground = MaterialShapeDrawable.createWithElevationOverlay(context)
+    }
 }

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

@@ -4,7 +4,6 @@ import android.view.LayoutInflater
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import eu.kanade.tachiyomi.databinding.TrackItemBinding
-import eu.kanade.tachiyomi.util.view.applyElevationOverlay
 
 class TrackAdapter(listener: OnClickListener) : RecyclerView.Adapter<TrackHolder>() {
 
@@ -30,7 +29,6 @@ class TrackAdapter(listener: OnClickListener) : RecyclerView.Adapter<TrackHolder
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TrackHolder {
         binding = TrackItemBinding.inflate(LayoutInflater.from(parent.context), parent, false)
-        binding.card.applyElevationOverlay()
         return TrackHolder(binding, this)
     }
 

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

@@ -5,7 +5,6 @@ import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import eu.kanade.tachiyomi.data.track.model.TrackSearch
 import eu.kanade.tachiyomi.databinding.TrackSearchItemBinding
-import eu.kanade.tachiyomi.util.view.applyElevationOverlay
 
 class TrackSearchAdapter(
     private val currentTrackUrl: String?,
@@ -35,7 +34,6 @@ class TrackSearchAdapter(
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TrackSearchHolder {
         val binding = TrackSearchItemBinding.inflate(LayoutInflater.from(parent.context), parent, false)
-        binding.root.applyElevationOverlay()
         return TrackSearchHolder(binding, this)
     }
 

app/src/main/java/eu/kanade/tachiyomi/util/view/ViewExtensions.kt

@@ -22,15 +22,12 @@ import androidx.core.view.descendants
 import androidx.core.view.forEach
 import androidx.recyclerview.widget.RecyclerView
 import androidx.viewpager.widget.ViewPager
-import com.google.android.material.card.MaterialCardView
 import com.google.android.material.chip.Chip
 import com.google.android.material.chip.ChipGroup
-import com.google.android.material.elevation.ElevationOverlayProvider
 import com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
 import com.google.android.material.snackbar.Snackbar
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.util.system.getResourceColor
-import eu.kanade.tachiyomi.util.system.isNightMode
 
 /**
  * Returns coordinates of view.
@@ -187,16 +184,6 @@ inline fun ChipGroup.setChips(
     }
 }
 
-/**
- * Applies elevation overlay to a MaterialCardView
- */
-inline fun MaterialCardView.applyElevationOverlay() {
-    if (context.isNightMode()) {
-        val provider = ElevationOverlayProvider(context)
-        setCardBackgroundColor(provider.compositeOverlay(cardBackgroundColor.defaultColor, cardElevation))
-    }
-}
-
 /**
  * Sets TextView max lines dynamically. Can only be called when the view is already laid out.
  */

app/src/main/java/eu/kanade/tachiyomi/widget/TachiyomiCoordinatorLayout.kt

@@ -93,7 +93,8 @@ class TachiyomiCoordinatorLayout @JvmOverloads constructor(
         consumed: IntArray
     ) {
         super.onNestedScroll(target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, type, consumed)
-        if (canLiftAppBarOnScroll) {
+        // Disable elevation overlay when tabs are visible
+        if (canLiftAppBarOnScroll && viewPager == null) {
             appBarLayout?.isLifted = dyConsumed != 0 || dyUnconsumed >= 0
         }
     }