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Merge pull request #3508 from owncloud/new_arch/multiselection_contro…
…l_selection Selected items controlled and hide/show FAB button
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...pp/src/main/java/com/owncloud/android/presentation/adapters/filelist/SelectableAdapter.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| /** | ||
| * ownCloud Android client application | ||
| * | ||
| * @author Fernando Sanz Velasco | ||
| * Copyright (C) 2022 ownCloud GmbH. | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License version 2, | ||
| * as published by the Free Software Foundation. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| * | ||
| */ | ||
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| package com.owncloud.android.presentation.adapters.filelist | ||
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| import android.util.SparseBooleanArray | ||
| import androidx.recyclerview.widget.RecyclerView | ||
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| abstract class SelectableAdapter<VH : RecyclerView.ViewHolder?> : | ||
| RecyclerView.Adapter<VH>() { | ||
| private val selectedItems: SparseBooleanArray = SparseBooleanArray() | ||
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| /** | ||
| * Indicates if the item at position position is selected | ||
| * @param position Position of the item to check | ||
| * @return true if the item is selected, false otherwise | ||
| */ | ||
| fun isSelected(position: Int): Boolean { | ||
| return getSelectedItems().contains(position) | ||
| } | ||
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| /** | ||
| * Toggle the selection status of the item at a given position | ||
| * @param position Position of the item to toggle the selection status for | ||
| */ | ||
| fun toggleSelection(position: Int) { | ||
| if (selectedItems[position, false]) { | ||
| selectedItems.delete(position) | ||
| } else { | ||
| selectedItems.put(position, true) | ||
| } | ||
| notifyItemChanged(position) | ||
| } | ||
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| /** | ||
| * Clear the selection status for all items | ||
| */ | ||
| fun clearSelection() { | ||
| val selection = getSelectedItems() | ||
| selectedItems.clear() | ||
| for (i in selection) { | ||
| notifyItemChanged(i) | ||
| } | ||
| } | ||
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| /** | ||
| * Count the selected items | ||
| * @return Selected items count | ||
| */ | ||
| val selectedItemCount: Int | ||
| get() = selectedItems.size() | ||
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| /** | ||
| * Indicates the list of selected items | ||
| * @return List of selected items ids | ||
| */ | ||
| fun getSelectedItems(): List<Int> { | ||
| val items: MutableList<Int> = ArrayList(selectedItems.size()) | ||
| for (i in 0 until selectedItems.size()) { | ||
| items.add(selectedItems.keyAt(i)) | ||
| } | ||
| return items | ||
| } | ||
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| companion object { | ||
| private val TAG = SelectableAdapter::class.java.simpleName | ||
| } | ||
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| } |
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