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83 lines
3.4 KiB
Kotlin
83 lines
3.4 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.library.history
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import android.view.LayoutInflater
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import android.view.ViewGroup
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import androidx.paging.PagedListAdapter
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import androidx.recyclerview.widget.DiffUtil
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import org.mozilla.fenix.selection.SelectionHolder
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import org.mozilla.fenix.library.history.viewholders.HistoryListItemViewHolder
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class HistoryAdapter(
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private val historyInteractor: HistoryInteractor,
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) : PagedListAdapter<History, HistoryListItemViewHolder>(historyDiffCallback),
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SelectionHolder<History> {
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private var mode: HistoryFragmentState.Mode = HistoryFragmentState.Mode.Normal
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override val selectedItems get() = mode.selectedItems
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var pendingDeletionIds = emptySet<Long>()
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private val itemsWithHeaders: MutableMap<HistoryItemTimeGroup, Int> = mutableMapOf()
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override fun getItemViewType(position: Int): Int = HistoryListItemViewHolder.LAYOUT_ID
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override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): HistoryListItemViewHolder {
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val view = LayoutInflater.from(parent.context).inflate(viewType, parent, false)
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return HistoryListItemViewHolder(view, historyInteractor, this)
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}
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fun updateMode(mode: HistoryFragmentState.Mode) {
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this.mode = mode
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// Update the delete button alpha that the first item holds
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if (itemCount > 0) notifyItemChanged(0)
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}
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override fun onBindViewHolder(holder: HistoryListItemViewHolder, position: Int) {
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val current = getItem(position) ?: return
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val isPendingDeletion = pendingDeletionIds.contains(current.visitedAt)
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var timeGroup: HistoryItemTimeGroup? = null
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// Add or remove the header and position to the map depending on it's deletion status
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if (itemsWithHeaders.containsKey(current.historyTimeGroup)) {
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if (isPendingDeletion && itemsWithHeaders[current.historyTimeGroup] == position) {
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itemsWithHeaders.remove(current.historyTimeGroup)
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} else if (isPendingDeletion && itemsWithHeaders[current.historyTimeGroup] != position) {
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// do nothing
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} else {
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if (position <= itemsWithHeaders[current.historyTimeGroup] as Int) {
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itemsWithHeaders[current.historyTimeGroup] = position
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timeGroup = current.historyTimeGroup
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}
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}
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} else if (!isPendingDeletion) {
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itemsWithHeaders[current.historyTimeGroup] = position
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timeGroup = current.historyTimeGroup
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}
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holder.bind(current, timeGroup, position == 0, mode, isPendingDeletion)
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}
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fun updatePendingDeletionIds(pendingDeletionIds: Set<Long>) {
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this.pendingDeletionIds = pendingDeletionIds
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}
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companion object {
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private val historyDiffCallback = object : DiffUtil.ItemCallback<History>() {
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override fun areItemsTheSame(oldItem: History, newItem: History): Boolean {
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return oldItem == newItem
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}
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override fun areContentsTheSame(oldItem: History, newItem: History): Boolean {
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return oldItem == newItem
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}
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override fun getChangePayload(oldItem: History, newItem: History): Any? {
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return newItem
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}
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}
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}
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}
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