251 lines
10 KiB
Swift
251 lines
10 KiB
Swift
// Copyright © 2021 Metabolist. All rights reserved.
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import Combine
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import UIKit
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import ViewModels
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final class EmojiPickerViewController: UIViewController {
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let searchBar = UISearchBar()
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private let viewModel: EmojiPickerViewModel
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private let selectionAction: (PickerEmoji) -> Void
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private let dismissAction: () -> Void
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private let skinToneButton = UIButton()
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private var cancellables = Set<AnyCancellable>()
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private lazy var collectionView: UICollectionView = {
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let itemSize = NSCollectionLayoutSize(
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widthDimension: .absolute(.minimumButtonDimension),
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heightDimension: .absolute(.minimumButtonDimension))
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let item = NSCollectionLayoutItem(layoutSize: itemSize)
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let groupSize = NSCollectionLayoutSize(
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widthDimension: .fractionalWidth(1.0),
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heightDimension: .estimated(.minimumButtonDimension))
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let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitems: [item])
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group.interItemSpacing = .flexible(.defaultSpacing)
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let section = NSCollectionLayoutSection(group: group)
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section.interGroupSpacing = .defaultSpacing
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section.contentInsets = NSDirectionalEdgeInsets(
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top: .defaultSpacing,
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leading: .defaultSpacing,
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bottom: .defaultSpacing,
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trailing: .defaultSpacing)
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let headerSize = NSCollectionLayoutSize(
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widthDimension: .fractionalWidth(1),
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heightDimension: .estimated(.defaultSpacing))
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let header = NSCollectionLayoutBoundarySupplementaryItem(
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layoutSize: headerSize,
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elementKind: Self.headerElementKind,
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alignment: .top)
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section.boundarySupplementaryItems = [header]
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let layout = UICollectionViewCompositionalLayout(section: section)
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return UICollectionView(frame: .zero, collectionViewLayout: layout)
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}()
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private lazy var dataSource: UICollectionViewDiffableDataSource<PickerEmoji.Category, PickerEmoji> = {
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let cellRegistration = UICollectionView.CellRegistration
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<EmojiCollectionViewCell, PickerEmoji> { [weak self] in
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$0.emoji = self?.applyingDefaultSkinTone(emoji: $2) ?? $2
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}
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let headerRegistration = UICollectionView.SupplementaryRegistration
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<EmojiCategoryHeaderView>(elementKind: "Header") { [weak self] in
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$0.label.text = self?.dataSource.snapshot().sectionIdentifiers[$2.section].displayName
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}
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let dataSource = UICollectionViewDiffableDataSource
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<PickerEmoji.Category, PickerEmoji>(collectionView: collectionView) {
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$0.dequeueConfiguredReusableCell(using: cellRegistration, for: $1, item: $2)
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}
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dataSource.supplementaryViewProvider = {
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$0.dequeueConfiguredReusableSupplementary(using: headerRegistration, for: $2)
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}
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return dataSource
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}()
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private lazy var defaultSkinToneSelectionMenu: UIMenu = {
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let clearSkinToneAction = UIAction(title: SystemEmoji.SkinTone.noneExample) { [weak self] _ in
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self?.skinToneButton.setTitle(SystemEmoji.SkinTone.noneExample, for: .normal)
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self?.viewModel.identification.appPreferences.defaultEmojiSkinTone = nil
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self?.reloadVisibleItems()
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}
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let setSkinToneActions = SystemEmoji.SkinTone.allCases.map { [weak self] skinTone in
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UIAction(title: skinTone.example) { _ in
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self?.skinToneButton.setTitle(skinTone.example, for: .normal)
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self?.viewModel.identification.appPreferences.defaultEmojiSkinTone = skinTone
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self?.reloadVisibleItems()
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}
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}
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return UIMenu(
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title: NSLocalizedString("emoji.default-skin-tone", comment: ""),
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children: [clearSkinToneAction] + setSkinToneActions)
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}()
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init(viewModel: EmojiPickerViewModel,
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selectionAction: @escaping (PickerEmoji) -> Void,
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dismissAction: @escaping () -> Void) {
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self.viewModel = viewModel
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self.selectionAction = selectionAction
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self.dismissAction = dismissAction
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super.init(nibName: nil, bundle: nil)
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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// swiftlint:disable:next function_body_length
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override func viewDidLoad() {
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super.viewDidLoad()
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view.addSubview(searchBar)
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searchBar.translatesAutoresizingMaskIntoConstraints = false
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searchBar.searchBarStyle = .minimal
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searchBar.placeholder = NSLocalizedString("emoji.search", comment: "")
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searchBar.searchTextField.addAction(
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UIAction { [weak self] _ in
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self?.viewModel.query = self?.searchBar.text ?? ""
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self?.collectionView.setContentOffset(.zero, animated: false)
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},
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for: .editingChanged)
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view.addSubview(skinToneButton)
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skinToneButton.translatesAutoresizingMaskIntoConstraints = false
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skinToneButton.titleLabel?.adjustsFontSizeToFitWidth = true
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skinToneButton.setTitle(
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viewModel.identification.appPreferences.defaultEmojiSkinTone?.example ?? SystemEmoji.SkinTone.noneExample,
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for: .normal)
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skinToneButton.showsMenuAsPrimaryAction = true
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skinToneButton.menu = defaultSkinToneSelectionMenu
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view.addSubview(collectionView)
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collectionView.translatesAutoresizingMaskIntoConstraints = false
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collectionView.backgroundColor = .clear
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collectionView.dataSource = dataSource
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collectionView.delegate = self
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NSLayoutConstraint.activate([
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searchBar.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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searchBar.topAnchor.constraint(equalTo: view.layoutMarginsGuide.topAnchor),
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skinToneButton.leadingAnchor.constraint(equalTo: searchBar.trailingAnchor, constant: .defaultSpacing),
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skinToneButton.topAnchor.constraint(equalTo: view.layoutMarginsGuide.topAnchor),
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skinToneButton.trailingAnchor.constraint(equalTo: view.layoutMarginsGuide.trailingAnchor),
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skinToneButton.bottomAnchor.constraint(equalTo: searchBar.bottomAnchor),
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collectionView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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collectionView.topAnchor.constraint(equalTo: searchBar.bottomAnchor),
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collectionView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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collectionView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
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])
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viewModel.$emoji
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.sink { [weak self] in self?.dataSource.apply(
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$0.snapshot(),
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animatingDifferences: !UIAccessibility.isReduceMotionEnabled) }
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.store(in: &cancellables)
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if let currentKeyboardLanguageIdentifier = searchBar.textInputMode?.primaryLanguage {
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viewModel.locale = Locale(identifier: currentKeyboardLanguageIdentifier)
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}
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NotificationCenter.default.publisher(for: UITextInputMode.currentInputModeDidChangeNotification)
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.compactMap { [weak self] _ in self?.searchBar.textInputMode?.primaryLanguage }
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.compactMap(Locale.init(identifier:))
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.assign(to: \.locale, on: viewModel)
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.store(in: &cancellables)
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}
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override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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guard let containerView = popoverPresentationController?.containerView else { return }
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// gets the popover presentation controller's built-in visual effect view to actually show
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func setClear(view: UIView) {
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view.backgroundColor = .clear
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if view == self.view {
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return
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}
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for view in view.subviews {
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setClear(view: view)
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}
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}
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setClear(view: containerView)
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}
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override func viewDidDisappear(_ animated: Bool) {
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super.viewDidDisappear(animated)
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dismissAction()
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}
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}
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extension EmojiPickerViewController: UICollectionViewDelegate {
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func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
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guard let item = dataSource.itemIdentifier(for: indexPath) else { return }
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select(emoji: applyingDefaultSkinTone(emoji: item))
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viewModel.updateUse(emoji: item)
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}
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func collectionView(_ collectionView: UICollectionView,
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contextMenuConfigurationForItemAt indexPath: IndexPath,
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point: CGPoint) -> UIContextMenuConfiguration? {
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guard let item = dataSource.itemIdentifier(for: indexPath),
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case let .system(emoji, inFrequentlyUsed) = item,
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!emoji.skinToneVariations.isEmpty
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else { return nil }
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return UIContextMenuConfiguration(identifier: nil, previewProvider: nil) { _ in
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UIMenu(children: ([emoji] + emoji.skinToneVariations).map { skinToneVariation in
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UIAction(title: skinToneVariation.emoji) { [weak self] _ in
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self?.select(emoji: .system(skinToneVariation, inFrequentlyUsed: inFrequentlyUsed))
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self?.viewModel.updateUse(emoji: item)
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}
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})
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}
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}
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}
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private extension EmojiPickerViewController {
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static let headerElementKind = "com.metabolist.metatext.emoji-picker.header"
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func select(emoji: PickerEmoji) {
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selectionAction(emoji)
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UISelectionFeedbackGenerator().selectionChanged()
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}
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func reloadVisibleItems() {
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var snapshot = dataSource.snapshot()
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let visibleItems = collectionView.indexPathsForVisibleItems.compactMap(dataSource.itemIdentifier(for:))
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snapshot.reloadItems(visibleItems)
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dataSource.apply(snapshot)
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}
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func applyingDefaultSkinTone(emoji: PickerEmoji) -> PickerEmoji {
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if case let .system(systemEmoji, inFrequentlyUsed) = emoji,
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let defaultEmojiSkinTone = viewModel.identification.appPreferences.defaultEmojiSkinTone {
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return .system(systemEmoji.applying(skinTone: defaultEmojiSkinTone), inFrequentlyUsed: inFrequentlyUsed)
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} else {
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return emoji
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}
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}
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}
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