101 lines
3.7 KiB
Kotlin
101 lines
3.7 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.exceptions
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import android.view.LayoutInflater
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import android.view.ViewGroup
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import androidx.annotation.LayoutRes
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import androidx.annotation.StringRes
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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 org.mozilla.fenix.exceptions.viewholders.ExceptionsDeleteButtonViewHolder
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import org.mozilla.fenix.exceptions.viewholders.ExceptionsHeaderViewHolder
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import org.mozilla.fenix.exceptions.viewholders.ExceptionsListItemViewHolder
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/**
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* Adapter for a list of sites that are exempted from saving logins or tracking protection,
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* along with controls to remove the exception.
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*/
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abstract class ExceptionsAdapter<T : Any>(
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private val interactor: ExceptionsInteractor<T>,
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diffCallback: DiffUtil.ItemCallback<AdapterItem>
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) : ListAdapter<ExceptionsAdapter.AdapterItem, RecyclerView.ViewHolder>(diffCallback) {
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/**
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* Change the list of items that are displayed.
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* Header and footer items are added to the list as well.
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*/
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fun updateData(exceptions: List<T>) {
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val adapterItems: List<AdapterItem> = listOf(AdapterItem.Header) +
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exceptions.map { wrapAdapterItem(it) } +
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listOf(AdapterItem.DeleteButton)
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submitList(adapterItems)
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}
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/**
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* Layout to use for the delete button.
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*/
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@get:LayoutRes
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abstract val deleteButtonLayoutId: Int
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/**
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* String to use for the exceptions list header.
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*/
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@get:StringRes
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abstract val headerDescriptionResource: Int
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/**
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* Converts an item from [updateData] into an adapter item.
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*/
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abstract fun wrapAdapterItem(item: T): AdapterItem.Item<T>
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final override fun getItemViewType(position: Int) = when (getItem(position)) {
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AdapterItem.DeleteButton -> deleteButtonLayoutId
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AdapterItem.Header -> ExceptionsHeaderViewHolder.LAYOUT_ID
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is AdapterItem.Item<*> -> ExceptionsListItemViewHolder.LAYOUT_ID
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}
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final override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
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val view = LayoutInflater.from(parent.context).inflate(viewType, parent, false)
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return when (viewType) {
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deleteButtonLayoutId ->
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ExceptionsDeleteButtonViewHolder(view, interactor)
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ExceptionsHeaderViewHolder.LAYOUT_ID ->
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ExceptionsHeaderViewHolder(view, headerDescriptionResource)
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ExceptionsListItemViewHolder.LAYOUT_ID ->
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ExceptionsListItemViewHolder(view, interactor)
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else -> throw IllegalStateException()
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}
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}
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@Suppress("Unchecked_Cast")
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final override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
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if (holder is ExceptionsListItemViewHolder<*>) {
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holder as ExceptionsListItemViewHolder<T>
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val adapterItem = getItem(position) as AdapterItem.Item<T>
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holder.bind(adapterItem.item, adapterItem.url)
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}
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}
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/**
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* Internal items for [ExceptionsAdapter]
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*/
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sealed class AdapterItem {
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object DeleteButton : AdapterItem()
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object Header : AdapterItem()
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/**
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* Represents an item to display in [ExceptionsAdapter].
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* [T] should refer to the same value as in the [ExceptionsAdapter] and [ExceptionsInteractor].
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*/
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abstract class Item<T> : AdapterItem() {
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abstract val item: T
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abstract val url: String
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}
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}
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}
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