mastodon-ios/Mastodon/Scene/Compose/TableViewCell/ComposeStatusPollTableViewC...

188 lines
9.6 KiB
Swift

//
// ComposeStatusPollTableViewCell.swift
// Mastodon
//
// Created by MainasuK Cirno on 2021-6-29.
//
import UIKit
protocol ComposeStatusPollTableViewCellDelegate: AnyObject {
func composeStatusPollTableViewCell(_ cell: ComposeStatusPollTableViewCell, pollOptionAttributesDidReorder options: [ComposeStatusPollItem.PollOptionAttribute])
}
final class ComposeStatusPollTableViewCell: UITableViewCell {
private(set) var dataSource: UICollectionViewDiffableDataSource<ComposeStatusPollSection, ComposeStatusPollItem>!
var observations = Set<NSKeyValueObservation>()
weak var customEmojiPickerInputViewModel: CustomEmojiPickerInputViewModel?
weak var delegate: ComposeStatusPollTableViewCellDelegate?
weak var composeStatusPollOptionCollectionViewCellDelegate: ComposeStatusPollOptionCollectionViewCellDelegate?
weak var composeStatusPollOptionAppendEntryCollectionViewCellDelegate: ComposeStatusPollOptionAppendEntryCollectionViewCellDelegate?
weak var composeStatusPollExpiresOptionCollectionViewCellDelegate: ComposeStatusPollExpiresOptionCollectionViewCellDelegate?
private static func createLayout() -> UICollectionViewLayout {
let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .estimated(44))
let item = NSCollectionLayoutItem(layoutSize: itemSize)
let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .estimated(44))
let group = NSCollectionLayoutGroup.vertical(layoutSize: groupSize, subitems: [item])
let section = NSCollectionLayoutSection(group: group)
section.contentInsetsReference = .readableContent
return UICollectionViewCompositionalLayout(section: section)
}
private(set) var collectionViewHeightLayoutConstraint: NSLayoutConstraint!
let collectionView: UICollectionView = {
let collectionViewLayout = ComposeStatusPollTableViewCell.createLayout()
let collectionView = UICollectionView(frame: .zero, collectionViewLayout: collectionViewLayout)
collectionView.register(ComposeStatusPollOptionCollectionViewCell.self, forCellWithReuseIdentifier: String(describing: ComposeStatusPollOptionCollectionViewCell.self))
collectionView.register(ComposeStatusPollOptionAppendEntryCollectionViewCell.self, forCellWithReuseIdentifier: String(describing: ComposeStatusPollOptionAppendEntryCollectionViewCell.self))
collectionView.register(ComposeStatusPollExpiresOptionCollectionViewCell.self, forCellWithReuseIdentifier: String(describing: ComposeStatusPollExpiresOptionCollectionViewCell.self))
collectionView.backgroundColor = .clear
collectionView.alwaysBounceVertical = true
collectionView.isScrollEnabled = false
return collectionView
}()
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
_init()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
_init()
}
}
extension ComposeStatusPollTableViewCell {
private func _init() {
backgroundColor = .clear
contentView.backgroundColor = .clear
collectionView.translatesAutoresizingMaskIntoConstraints = false
contentView.addSubview(collectionView)
collectionViewHeightLayoutConstraint = collectionView.heightAnchor.constraint(equalToConstant: 300).priority(.defaultHigh)
NSLayoutConstraint.activate([
collectionView.topAnchor.constraint(equalTo: contentView.topAnchor),
collectionView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
collectionView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor),
collectionView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),
collectionViewHeightLayoutConstraint,
])
let longPressReorderGesture = UILongPressGestureRecognizer(target: self, action: #selector(ComposeStatusPollTableViewCell.longPressReorderGestureHandler(_:)))
collectionView.addGestureRecognizer(longPressReorderGesture)
collectionView.observe(\.contentSize, options: [.initial, .new]) { [weak self] collectionView, _ in
guard let self = self else { return }
print(collectionView.contentSize)
self.collectionViewHeightLayoutConstraint.constant = collectionView.contentSize.height
}
.store(in: &observations)
self.dataSource = UICollectionViewDiffableDataSource(collectionView: collectionView) { [
weak self
] collectionView, indexPath, item -> UICollectionViewCell? in
guard let self = self else { return UICollectionViewCell() }
switch item {
case .pollOption(let attribute):
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: String(describing: ComposeStatusPollOptionCollectionViewCell.self), for: indexPath) as! ComposeStatusPollOptionCollectionViewCell
cell.pollOptionView.optionTextField.text = attribute.option.value
cell.pollOptionView.optionTextField.placeholder = L10n.Scene.Compose.Poll.optionNumber(indexPath.item + 1)
cell.pollOption
.receive(on: DispatchQueue.main)
.assign(to: \.value, on: attribute.option)
.store(in: &cell.disposeBag)
cell.delegate = self.composeStatusPollOptionCollectionViewCellDelegate
if let customEmojiPickerInputViewModel = self.customEmojiPickerInputViewModel {
ComposeStatusSection.configureCustomEmojiPicker(viewModel: customEmojiPickerInputViewModel, customEmojiReplaceableTextInput: cell.pollOptionView.optionTextField, disposeBag: &cell.disposeBag)
}
return cell
case .pollOptionAppendEntry:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: String(describing: ComposeStatusPollOptionAppendEntryCollectionViewCell.self), for: indexPath) as! ComposeStatusPollOptionAppendEntryCollectionViewCell
cell.delegate = self.composeStatusPollOptionAppendEntryCollectionViewCellDelegate
return cell
case .pollExpiresOption(let attribute):
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: String(describing: ComposeStatusPollExpiresOptionCollectionViewCell.self), for: indexPath) as! ComposeStatusPollExpiresOptionCollectionViewCell
cell.durationButton.setTitle(L10n.Scene.Compose.Poll.durationTime(attribute.expiresOption.value.title), for: .normal)
attribute.expiresOption
.receive(on: DispatchQueue.main)
.sink { [weak cell] expiresOption in
guard let cell = cell else { return }
cell.durationButton.setTitle(L10n.Scene.Compose.Poll.durationTime(expiresOption.title), for: .normal)
}
.store(in: &cell.disposeBag)
cell.delegate = self.composeStatusPollExpiresOptionCollectionViewCellDelegate
return cell
}
}
dataSource.reorderingHandlers.canReorderItem = { item in
switch item {
case .pollOption: return true
default: return false
}
}
// update reordered data source
dataSource.reorderingHandlers.didReorder = { [weak self] transaction in
guard let self = self else { return }
let items = transaction.finalSnapshot.itemIdentifiers
var pollOptionAttributes: [ComposeStatusPollItem.PollOptionAttribute] = []
for item in items {
guard case let .pollOption(attribute) = item else { continue }
pollOptionAttributes.append(attribute)
}
self.delegate?.composeStatusPollTableViewCell(self, pollOptionAttributesDidReorder: pollOptionAttributes)
}
}
}
extension ComposeStatusPollTableViewCell {
@objc private func longPressReorderGestureHandler(_ sender: UILongPressGestureRecognizer) {
switch(sender.state) {
case .began:
guard let selectedIndexPath = collectionView.indexPathForItem(at: sender.location(in: collectionView)),
let cell = collectionView.cellForItem(at: selectedIndexPath) as? ComposeStatusPollOptionCollectionViewCell else {
break
}
// check if pressing reorder bar no not
let locationInCell = sender.location(in: cell)
guard cell.reorderBarImageView.frame.contains(locationInCell) else {
return
}
collectionView.beginInteractiveMovementForItem(at: selectedIndexPath)
case .changed:
guard let selectedIndexPath = collectionView.indexPathForItem(at: sender.location(in: collectionView)),
let dataSource = self.dataSource else {
break
}
guard let item = dataSource.itemIdentifier(for: selectedIndexPath),
case .pollOption = item else {
collectionView.cancelInteractiveMovement()
return
}
var position = sender.location(in: collectionView)
position.x = collectionView.frame.width * 0.5
collectionView.updateInteractiveMovementTargetPosition(position)
case .ended:
collectionView.endInteractiveMovement()
collectionView.reloadData()
default:
collectionView.cancelInteractiveMovement()
}
}
}