Use custom Snackbar for DetailsActivity

app/src/main/java/org/koitharu/kotatsu/base/ui/widgets/FadingSnackbar.kt

@@ -0,0 +1,97 @@
+/*
+ * Copyright 2018 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.koitharu.kotatsu.base.ui.widgets
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import android.widget.Button
+import android.widget.FrameLayout
+import android.widget.TextView
+import androidx.annotation.StringRes
+import androidx.core.view.postDelayed
+import org.koitharu.kotatsu.R
+
+/**
+ * A custom snackbar implementation allowing more control over placement and entry/exit animations.
+ *
+ * Xtimms: Well, my sufferings over the Snackbar in [DetailsActivity] will go away forever... Thanks, Google.
+ *
+ * https://github.com/google/iosched/blob/main/mobile/src/main/java/com/google/samples/apps/iosched/widget/FadingSnackbar.kt
+ */
+class FadingSnackbar @JvmOverloads constructor(
+	context: Context,
+	attrs: AttributeSet,
+	defStyleAttr: Int = 0
+) : FrameLayout(context, attrs, defStyleAttr) {
+
+	private val message: TextView
+	private val action: Button
+
+	init {
+		val view = LayoutInflater.from(context).inflate(R.layout.fading_snackbar_layout, this, true)
+		message = view.findViewById(R.id.snackbar_text)
+		action = view.findViewById(R.id.snackbar_action)
+	}
+
+	fun dismiss() {
+		if (visibility == VISIBLE && alpha == 1f) {
+			animate()
+				.alpha(0f)
+				.withEndAction { visibility = GONE }
+				.duration = EXIT_DURATION
+		}
+	}
+
+	fun show(
+		messageText: CharSequence? = null,
+		@StringRes actionId: Int? = null,
+		longDuration: Boolean = true,
+		actionClick: () -> Unit = { dismiss() },
+		dismissListener: () -> Unit = { }
+	) {
+		message.text = messageText
+		if (actionId != null) {
+			action.run {
+				visibility = VISIBLE
+				text = context.getString(actionId)
+				setOnClickListener {
+					actionClick()
+				}
+			}
+		} else {
+			action.visibility = GONE
+		}
+		alpha = 0f
+		visibility = VISIBLE
+		animate()
+			.alpha(1f)
+			.duration = ENTER_DURATION
+		val showDuration = ENTER_DURATION + if (longDuration) LONG_DURATION else SHORT_DURATION
+		postDelayed(showDuration) {
+			dismiss()
+			dismissListener()
+		}
+	}
+
+	companion object {
+		private const val ENTER_DURATION = 300L
+		private const val EXIT_DURATION = 200L
+		private const val SHORT_DURATION = 1_500L
+		private const val LONG_DURATION = 2_750L
+	}
+}

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

@@ -85,14 +85,13 @@ class DetailsActivity : BaseActivity<ActivityDetailsBinding>(),
 				finishAfterTransition()
 			}
 			else -> {
-				Snackbar.make(binding.coordinator, e.getDisplayMessage(resources), Snackbar.LENGTH_LONG)
-					.show()
+				binding.snackbar.show(e.getDisplayMessage(resources))
 			}
 		}
 	}
 
 	override fun onWindowInsetsChanged(insets: Insets) {
-		binding.coordinator.updatePadding(
+		binding.snackbar.updatePadding(
 			bottom = insets.bottom
 		)
 		binding.toolbar.updatePadding(