commonMain.app.cash.redwood.widget.MutableListChildren.kt Maven / Gradle / Ivy

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Multiplatform reactive UI using Kotlin and Jetpack Compose

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/*
 * Copyright (C) 2021 Square, Inc.
 *
 * 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 app.cash.redwood.widget

import kotlin.native.ObjCName

/**
 * A [MutableList] that is also a [Widget.Children].
 *
 * @param container Optional existing [MutableList] instance to wrap.
 */
@ObjCName("MutableListChildren", exact = true)
public class MutableListChildren(
  private val container: MutableList> = mutableListOf(),
  private val modifierUpdated: () -> Unit = {},
) : Widget.Children,
  MutableList> by container {
  override val widgets: MutableList> get() = container

  override fun insert(index: Int, widget: Widget) {
    container.add(index, widget)
  }

  override fun move(fromIndex: Int, toIndex: Int, count: Int) {
    container.move(fromIndex, toIndex, count)
  }

  override fun remove(index: Int, count: Int) {
    container.remove(index, count)
  }

  override fun onModifierUpdated(index: Int, widget: Widget) {
    modifierUpdated()
  }

  override fun detach() {
    container.clear()
  }
}