Fix covers size resolving

2022-08-08 10:49:03 +03:00
parent dff17fd11f
commit fcdfaf5564
7 changed files with 107 additions and 15 deletions
--- a/app/src/main/java/org/koitharu/kotatsu/utils/image/CoverSizeResolver.kt
+++ b/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)
+		}
+	}
+}