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// SPDX-FileCopyrightText: 2024 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
package org.yuzu.yuzu_emu.adapters
import android.annotation.SuppressLint
import androidx.recyclerview.widget.RecyclerView
import org.yuzu.yuzu_emu.viewholder.AbstractViewHolder
/**
* Generic list class meant to take care of basic lists
* @param currentList The list to show initially
*/
abstract class AbstractListAdapter<Model : Any, Holder : AbstractViewHolder<Model>>(
open var currentList: List<Model>
) : RecyclerView.Adapter<Holder>() {
override fun onBindViewHolder(holder: Holder, position: Int) =
holder.bind(currentList[position])
override fun getItemCount(): Int = currentList.size
/**
* Adds an item to [currentList] and notifies the underlying adapter of the change. If no parameter
* is passed in for position, [item] is added to the end of the list. Invokes [callback] last.
* @param item The item to add to the list
* @param position Index where [item] will be added
* @param callback Lambda that's called at the end of the list changes and has the added list
* position passed in as a parameter
*/
open fun addItem(item: Model, position: Int = -1, callback: ((position: Int) -> Unit)? = null) {
val newList = currentList.toMutableList()
val positionToUpdate: Int
if (position == -1) {
newList.add(item)
currentList = newList
positionToUpdate = currentList.size - 1
} else {
newList.add(position, item)
currentList = newList
positionToUpdate = position
}
onItemAdded(positionToUpdate, callback)
}
protected fun onItemAdded(position: Int, callback: ((Int) -> Unit)? = null) {
notifyItemInserted(position)
callback?.invoke(position)
}
/**
* Replaces the [item] at [position] in the [currentList] and notifies the underlying adapter
* of the change. Invokes [callback] last.
* @param item New list item
* @param position Index where [item] will replace the existing list item
* @param callback Lambda that's called at the end of the list changes and has the changed list
* position passed in as a parameter
*/
fun changeItem(item: Model, position: Int, callback: ((position: Int) -> Unit)? = null) {
val newList = currentList.toMutableList()
newList[position] = item
currentList = newList
onItemChanged(position, callback)
}
protected fun onItemChanged(position: Int, callback: ((Int) -> Unit)? = null) {
notifyItemChanged(position)
callback?.invoke(position)
}
/**
* Removes the list item at [position] in [currentList] and notifies the underlying adapter
* of the change. Invokes [callback] last.
* @param position Index where the list item will be removed
* @param callback Lambda that's called at the end of the list changes and has the removed list
* position passed in as a parameter
*/
fun removeItem(position: Int, callback: ((position: Int) -> Unit)? = null) {
val newList = currentList.toMutableList()
newList.removeAt(position)
currentList = newList
onItemRemoved(position, callback)
}
protected fun onItemRemoved(position: Int, callback: ((Int) -> Unit)? = null) {
notifyItemRemoved(position)
callback?.invoke(position)
}
/**
* Replaces [currentList] with [newList] and notifies the underlying adapter of the change.
* @param newList The new list to replace [currentList]
*/
@SuppressLint("NotifyDataSetChanged")
open fun replaceList(newList: List<Model>) {
currentList = newList
notifyDataSetChanged()
}
}
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