/*
 * 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.widget;

import com.facebook.litho.ComponentTree;
import com.facebook.rendercore.RunnableHandler;
import javax.annotation.Nullable;

/** A Factory used to create {@link RunnableHandler}s in {@link RecyclerBinder}. */
public interface LayoutHandlerFactory {
  /**
   * @return a new {@link RunnableHandler} that will be used to compute the layouts of the children
   *     of the {@link RecyclerSpec}.
   */
  @Nullable
  RunnableHandler createLayoutCalculationHandler(RenderInfo renderInfo);

  /**
   * @return If true, {@link RunnableHandler} of {@link ComponentTree} that's being updated by
   *     update operation of {@link RecyclerBinder} will be replaced by new {@link RunnableHandler}
   *     returned from {@link #createLayoutCalculationHandler(RenderInfo)}, otherwise keep using
   *     existing {@link RunnableHandler} created during item insertion.
   */
  boolean shouldUpdateLayoutHandler(RenderInfo previousRenderInfo, RenderInfo newRenderInfo);
}
