127 lines
4.3 KiB
Kotlin
127 lines
4.3 KiB
Kotlin
/* Copyright 2021 Tusky Contributors
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*
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* This file is a part of Tusky.
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with Tusky; if not,
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* see <http://www.gnu.org/licenses>. */
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package com.keylesspalace.tusky.components.trending
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import android.view.LayoutInflater
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import android.view.ViewGroup
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import androidx.recyclerview.widget.DiffUtil
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import androidx.recyclerview.widget.ListAdapter
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import androidx.recyclerview.widget.RecyclerView
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import com.keylesspalace.tusky.adapter.TrendingDateViewHolder
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import com.keylesspalace.tusky.adapter.TrendingTagViewHolder
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import com.keylesspalace.tusky.databinding.ItemTrendingCellBinding
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import com.keylesspalace.tusky.databinding.ItemTrendingDateBinding
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import com.keylesspalace.tusky.interfaces.LinkListener
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import com.keylesspalace.tusky.viewdata.TrendingViewData
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class TrendingAdapter(
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private val trendingListener: LinkListener,
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) : ListAdapter<TrendingViewData, RecyclerView.ViewHolder>(TrendingDifferCallback) {
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init {
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stateRestorationPolicy = StateRestorationPolicy.PREVENT_WHEN_EMPTY
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}
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override fun onCreateViewHolder(viewGroup: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
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return when (viewType) {
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VIEW_TYPE_TAG -> {
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val binding =
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ItemTrendingCellBinding.inflate(LayoutInflater.from(viewGroup.context))
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TrendingTagViewHolder(binding)
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}
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else -> {
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val binding =
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ItemTrendingDateBinding.inflate(LayoutInflater.from(viewGroup.context))
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TrendingDateViewHolder(binding)
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}
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}
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}
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override fun onBindViewHolder(viewHolder: RecyclerView.ViewHolder, position: Int) {
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bindViewHolder(viewHolder, position, null)
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}
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override fun onBindViewHolder(
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viewHolder: RecyclerView.ViewHolder,
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position: Int,
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payloads: List<*>
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) {
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bindViewHolder(viewHolder, position, payloads)
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}
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private fun bindViewHolder(
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viewHolder: RecyclerView.ViewHolder,
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position: Int,
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payloads: List<*>?
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) {
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when (val header = getItem(position)) {
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is TrendingViewData.Tag -> {
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val maxTrendingValue = currentList
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.flatMap { trendingViewData ->
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trendingViewData.asTagOrNull()?.tag?.history.orEmpty()
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}
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.mapNotNull { it.uses.toLongOrNull() }
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.maxOrNull() ?: 1
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val holder = viewHolder as TrendingTagViewHolder
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holder.setup(header, maxTrendingValue, trendingListener)
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}
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is TrendingViewData.Header -> {
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val holder = viewHolder as TrendingDateViewHolder
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holder.setup(header.start, header.end)
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}
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}
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}
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override fun getItemViewType(position: Int): Int {
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return if (getItem(position) is TrendingViewData.Tag) {
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VIEW_TYPE_TAG
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} else {
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VIEW_TYPE_HEADER
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}
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}
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companion object {
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const val VIEW_TYPE_HEADER = 0
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const val VIEW_TYPE_TAG = 1
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val TrendingDifferCallback = object : DiffUtil.ItemCallback<TrendingViewData>() {
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override fun areItemsTheSame(
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oldItem: TrendingViewData,
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newItem: TrendingViewData
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): Boolean {
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return oldItem.id == newItem.id
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}
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override fun areContentsTheSame(
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oldItem: TrendingViewData,
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newItem: TrendingViewData
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): Boolean {
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return false
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}
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override fun getChangePayload(
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oldItem: TrendingViewData,
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newItem: TrendingViewData
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): Any? {
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return null
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}
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}
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}
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}
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