Fix covers size resolving

app/src/main/java/org/koitharu/kotatsu/details/ui/DetailsFragment.kt

@@ -46,6 +46,7 @@ import org.koitharu.kotatsu.search.ui.SearchActivity
 import org.koitharu.kotatsu.utils.FileSize
 import org.koitharu.kotatsu.utils.ShareHelper
 import org.koitharu.kotatsu.utils.ext.*
+import org.koitharu.kotatsu.utils.image.CoverSizeResolver
 
 class DetailsFragment :
 	BaseFragment<FragmentDetailsBinding>(),
@@ -354,13 +355,22 @@ class DetailsFragment :
 		}
 		val request = ImageRequest.Builder(context ?: return)
 			.target(binding.imageViewCover)
+			.size(CoverSizeResolver(binding.imageViewCover))
 			.data(imageUrl)
 			.crossfade(true)
 			.referer(manga.publicUrl)
 			.lifecycle(viewLifecycleOwner)
-		lastResult?.drawable?.let {
+			.placeholderMemoryCacheKey(manga.coverUrl)
-			request.fallback(it)
+		val previousDrawable = lastResult?.drawable
-		} ?: request.fallback(R.drawable.ic_placeholder)
+		if (previousDrawable != null) {
+			request.fallback(previousDrawable)
+				.placeholder(previousDrawable)
+				.error(previousDrawable)
+		} else {
+			request.fallback(R.drawable.ic_placeholder)
+				.placeholder(R.drawable.ic_placeholder)
+				.error(R.drawable.ic_placeholder)
+		}
 		request.enqueueWith(coil)
 	}
 

app/src/main/java/org/koitharu/kotatsu/list/ui/adapter/MangaGridItemAD.kt

@@ -17,6 +17,7 @@ import org.koitharu.kotatsu.utils.ext.disposeImageRequest
 import org.koitharu.kotatsu.utils.ext.enqueueWith
 import org.koitharu.kotatsu.utils.ext.newImageRequest
 import org.koitharu.kotatsu.utils.ext.referer
+import org.koitharu.kotatsu.utils.image.CoverSizeResolver
 
 fun mangaGridItemAD(
 	coil: ImageLoader,
@@ -24,9 +25,8 @@ fun mangaGridItemAD(
 	clickListener: OnListItemClickListener<Manga>,
 	sizeResolver: ItemSizeResolver?,
 ) = adapterDelegateViewBinding<MangaGridModel, ListModel, ItemMangaGridBinding>(
-	{ inflater, parent -> ItemMangaGridBinding.inflate(inflater, parent, false) }
+	{ inflater, parent -> ItemMangaGridBinding.inflate(inflater, parent, false) },
 ) {
-
 	var badge: BadgeDrawable? = null
 
 	itemView.setOnClickListener {
@@ -46,6 +46,7 @@ fun mangaGridItemAD(
 		binding.progressView.setPercent(item.progress, MangaListAdapter.PAYLOAD_PROGRESS in payloads)
 		binding.imageViewCover.newImageRequest(item.coverUrl)?.run {
 			referer(item.manga.publicUrl)
+			size(CoverSizeResolver(binding.imageViewCover))
 			placeholder(R.drawable.ic_placeholder)
 			fallback(R.drawable.ic_placeholder)
 			error(R.drawable.ic_placeholder)

app/src/main/java/org/koitharu/kotatsu/list/ui/adapter/MangaListDetailedItemAD.kt

@@ -2,7 +2,6 @@ package org.koitharu.kotatsu.list.ui.adapter
 
 import androidx.lifecycle.LifecycleOwner
 import coil.ImageLoader
-import org.koitharu.kotatsu.utils.ext.*
 import com.google.android.material.badge.BadgeDrawable
 import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
 import org.koitharu.kotatsu.R
@@ -12,15 +11,16 @@ import org.koitharu.kotatsu.history.domain.PROGRESS_NONE
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.list.ui.model.MangaListDetailedModel
 import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.utils.ext.*
+import org.koitharu.kotatsu.utils.image.CoverSizeResolver
 
 fun mangaListDetailedItemAD(
 	coil: ImageLoader,
 	lifecycleOwner: LifecycleOwner,
 	clickListener: OnListItemClickListener<Manga>,
 ) = adapterDelegateViewBinding<MangaListDetailedModel, ListModel, ItemMangaListDetailsBinding>(
-	{ inflater, parent -> ItemMangaListDetailsBinding.inflate(inflater, parent, false) }
+	{ inflater, parent -> ItemMangaListDetailsBinding.inflate(inflater, parent, false) },
 ) {
-
 	var badge: BadgeDrawable? = null
 
 	itemView.setOnClickListener {
@@ -36,6 +36,7 @@ fun mangaListDetailedItemAD(
 		binding.progressView.setPercent(item.progress, MangaListAdapter.PAYLOAD_PROGRESS in payloads)
 		binding.imageViewCover.newImageRequest(item.coverUrl)?.run {
 			referer(item.manga.publicUrl)
+			size(CoverSizeResolver(binding.imageViewCover))
 			placeholder(R.drawable.ic_placeholder)
 			fallback(R.drawable.ic_placeholder)
 			error(R.drawable.ic_placeholder)

app/src/main/java/org/koitharu/kotatsu/list/ui/adapter/MangaListItemAD.kt

@@ -2,7 +2,6 @@ package org.koitharu.kotatsu.list.ui.adapter
 
 import androidx.lifecycle.LifecycleOwner
 import coil.ImageLoader
-import org.koitharu.kotatsu.utils.ext.*
 import com.google.android.material.badge.BadgeDrawable
 import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
 import org.koitharu.kotatsu.R
@@ -11,15 +10,15 @@ import org.koitharu.kotatsu.databinding.ItemMangaListBinding
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.list.ui.model.MangaListModel
 import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.utils.ext.*
 
 fun mangaListItemAD(
 	coil: ImageLoader,
 	lifecycleOwner: LifecycleOwner,
 	clickListener: OnListItemClickListener<Manga>,
 ) = adapterDelegateViewBinding<MangaListModel, ListModel, ItemMangaListBinding>(
-	{ inflater, parent -> ItemMangaListBinding.inflate(inflater, parent, false) }
+	{ inflater, parent -> ItemMangaListBinding.inflate(inflater, parent, false) },
 ) {
-
 	var badge: BadgeDrawable? = null
 
 	itemView.setOnClickListener {

app/src/main/java/org/koitharu/kotatsu/utils/image/CoverSizeResolver.kt

@@ -0,0 +1,83 @@
+package org.koitharu.kotatsu.utils.image
+
+import android.view.View
+import android.view.View.OnLayoutChangeListener
+import android.view.ViewGroup
+import android.widget.ImageView
+import coil.size.Dimension
+import coil.size.Size
+import coil.size.SizeResolver
+import kotlin.coroutines.resume
+import kotlin.math.roundToInt
+import kotlinx.coroutines.CancellableContinuation
+import kotlinx.coroutines.suspendCancellableCoroutine
+
+private const val ASPECT_RATIO_HEIGHT = 18f
+private const val ASPECT_RATIO_WIDTH = 13f
+
+class CoverSizeResolver(
+	private val imageView: ImageView,
+) : SizeResolver {
+
+	override suspend fun size(): Size {
+		getSize()?.let { return it }
+		return suspendCancellableCoroutine { cont ->
+			val layoutListener = LayoutListener(cont)
+			imageView.addOnLayoutChangeListener(layoutListener)
+			cont.invokeOnCancellation {
+				imageView.removeOnLayoutChangeListener(layoutListener)
+			}
+		}
+	}
+
+	private fun getSize(): Size? {
+		val lp = imageView.layoutParams
+		var width = getDimension(lp.width, imageView.width, imageView.paddingLeft + imageView.paddingRight)
+		var height = getDimension(lp.height, imageView.height, imageView.paddingTop + imageView.paddingBottom)
+		if (width == null && height == null) {
+			return null
+		}
+		if (height == null && width != null) {
+			height = Dimension((width.px * ASPECT_RATIO_HEIGHT / ASPECT_RATIO_WIDTH).roundToInt())
+		} else if (width == null && height != null) {
+			width = Dimension((height.px * ASPECT_RATIO_WIDTH / ASPECT_RATIO_HEIGHT).roundToInt())
+		}
+		return Size(checkNotNull(width), checkNotNull(height))
+	}
+
+	private fun getDimension(paramSize: Int, viewSize: Int, paddingSize: Int): Dimension.Pixels? {
+		if (paramSize == ViewGroup.LayoutParams.WRAP_CONTENT) {
+			return null
+		}
+		val insetParamSize = paramSize - paddingSize
+		if (insetParamSize > 0) {
+			return Dimension(insetParamSize)
+		}
+		val insetViewSize = viewSize - paddingSize
+		if (insetViewSize > 0) {
+			return Dimension(insetViewSize)
+		}
+		return null
+	}
+
+	private inner class LayoutListener(
+		private val continuation: CancellableContinuation<Size>,
+	) : OnLayoutChangeListener {
+
+		override fun onLayoutChange(
+			v: View,
+			left: Int,
+			top: Int,
+			right: Int,
+			bottom: Int,
+			oldLeft: Int,
+			oldTop: Int,
+			oldRight: Int,
+			oldBottom: Int,
+		) {
+			val size = getSize() ?: return
+			v.removeOnLayoutChangeListener(this)
+			continuation.resume(size)
+		}
+	}
+}

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

@@ -12,10 +12,9 @@
 	<com.google.android.material.imageview.ShapeableImageView
 		android:id="@+id/imageView_cover"
 		android:layout_width="42dp"
-		android:layout_height="0dp"
+		android:layout_height="42dp"
 		android:scaleType="centerCrop"
 		app:layout_constraintBottom_toBottomOf="parent"
-		app:layout_constraintDimensionRatio="h,1:1"
 		app:layout_constraintStart_toStartOf="parent"
 		app:layout_constraintTop_toTopOf="parent"
 		app:shapeAppearanceOverlay="@style/ShapeAppearanceOverlay.Kotatsu.Cover.Small"

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

@@ -12,10 +12,9 @@
 	<com.google.android.material.imageview.ShapeableImageView
 		android:id="@+id/imageView_cover"
 		android:layout_width="42dp"
-		android:layout_height="0dp"
+		android:layout_height="42dp"
 		android:scaleType="centerCrop"
 		app:layout_constraintBottom_toBottomOf="parent"
-		app:layout_constraintDimensionRatio="h,1:1"
 		app:layout_constraintStart_toStartOf="parent"
 		app:layout_constraintTop_toTopOf="parent"
 		app:shapeAppearanceOverlay="@style/ShapeAppearanceOverlay.Kotatsu.Cover.Small"