Convert AOSPLithoLifecycleProvider

Summary: As per title

Reviewed By: adityasharat

Differential Revision: D43667621

fbshipit-source-id: f746a1998b67607649267311d283c780d71f5075

Author: Fabio Carballo

litho-core/src/main/java/com/facebook/litho/AOSPLithoLifecycleProvider.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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 com.facebook.litho
+
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.Lifecycle.Event.ON_DESTROY
+import androidx.lifecycle.Lifecycle.Event.ON_PAUSE
+import androidx.lifecycle.Lifecycle.Event.ON_RESUME
+import androidx.lifecycle.LifecycleObserver
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.OnLifecycleEvent
+import com.facebook.litho.LithoLifecycleProvider.LithoLifecycle
+
+/**
+ * This LithoLifecycleProvider implementation dispatches to the registered observers the lifecycle
+ * state changes triggered by the provided LifecycleOwner. For example, if a Fragment is passed as
+ * param, the observers will be registered to listen to all of the fragment's lifecycle state
+ * changes.
+ */
+open class AOSPLithoLifecycleProvider(lifecycleOwner: LifecycleOwner) :
+    LithoLifecycleProvider, LifecycleObserver, AOSPLifecycleOwnerProvider {
+
+  init {
+    lifecycleOwner.lifecycle.addObserver(this)
+  }
+
+  private val lithoLifecycleProviderDelegate: LithoLifecycleProviderDelegate =
+      LithoLifecycleProviderDelegate()
+
+  private val _lifecycleOwner: LifecycleOwner = lifecycleOwner
+
+  override val lifecycleStatus: LithoLifecycle
+    get() = lithoLifecycleProviderDelegate.lifecycleStatus
+
+  override fun moveToLifecycle(lithoLifecycle: LithoLifecycle) {
+    lithoLifecycleProviderDelegate.moveToLifecycle(lithoLifecycle)
+  }
+
+  override fun addListener(listener: LithoLifecycleListener) {
+    lithoLifecycleProviderDelegate.addListener(listener)
+  }
+
+  override fun removeListener(listener: LithoLifecycleListener) {
+    lithoLifecycleProviderDelegate.removeListener(listener)
+  }
+
+  @OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
+  private fun onVisible() {
+    moveToLifecycle(LithoLifecycle.HINT_VISIBLE)
+  }
+
+  @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
+  private fun onInvisible() {
+    moveToLifecycle(LithoLifecycle.HINT_INVISIBLE)
+  }
+
+  @OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
+  private fun onDestroy() {
+    moveToLifecycle(LithoLifecycle.DESTROYED)
+  }
+
+  override val lifecycleOwner: LifecycleOwner?
+    get() = _lifecycleOwner
+}