126 lines
4.8 KiB
Swift
126 lines
4.8 KiB
Swift
//
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// TabPickerViewController.swift
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// SBrowser
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//
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// Created by James Magahern on 7/30/20.
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//
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import UIKit
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protocol TabPickerViewControllerDelegate: class
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{
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func tabPicker(_ picker: TabPickerViewController, didSelectTab tab: Tab)
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func tabPicker(_ picker: TabPickerViewController, willCloseTab tab: Tab)
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}
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class TabPickerViewController: UIViewController, UICollectionViewDelegate
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{
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let tabController: TabController!
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var selectedTab: Tab?
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weak var delegate: TabPickerViewControllerDelegate?
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typealias TabID = UUID
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private var collectionView: UICollectionView?
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private var dataSource: UICollectionViewDiffableDataSource<Int, TabID>?
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init(tabController: TabController) {
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self.tabController = tabController
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super.init(nibName: nil, bundle: nil)
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self.title = "Tabs"
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}
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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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override func loadView() {
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var listConfig = UICollectionLayoutListConfiguration(appearance: .grouped)
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listConfig.trailingSwipeActionsConfigurationProvider = { [weak self] indexPath in
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if self?.dataSource?.snapshot().numberOfItems ?? 0 <= 1 {
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return nil
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}
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return UISwipeActionsConfiguration(actions: [ UIContextualAction(style: .destructive, title: "Close", handler: { [weak self] (action, view, completionHandler) in
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guard let self = self else { return }
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if let item = self.dataSource?.itemIdentifier(for: indexPath), var snapshot = self.dataSource?.snapshot() {
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if let tab = self.tabController.tab(forIdentifier: item) {
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self.delegate?.tabPicker(self, willCloseTab: tab)
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self.tabController.closeTab(tab)
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snapshot.deleteItems([ item ])
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self.dataSource?.apply(snapshot, animatingDifferences: true)
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}
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}
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})])
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}
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let listLayout = UICollectionViewCompositionalLayout.list(using: listConfig)
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let collectionView = UICollectionView(frame: .zero, collectionViewLayout: listLayout)
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let registry = UICollectionView.CellRegistration<UICollectionViewListCell, TabID> { [weak self] (listCell, indexPath, item) in
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guard let self = self else { return }
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var config = listCell.defaultContentConfiguration()
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if let tab = self.tabController.tab(forIdentifier: item) {
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if let title = tab.title {
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config.text = title
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config.secondaryText = tab.url?.absoluteString
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} else {
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config.text = tab.url?.absoluteString
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config.secondaryText = tab.url?.absoluteString
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}
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if let image = tab.favicon {
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config.image = image
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config.imageProperties.maximumSize = CGSize(width: 21.0, height: 21.0)
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config.imageProperties.cornerRadius = 3.0
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}
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if tab == self.selectedTab {
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listCell.accessories = [ .checkmark() ]
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} else {
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listCell.accessories = []
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}
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}
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listCell.contentConfiguration = config
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}
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let dataSource = UICollectionViewDiffableDataSource<Int, TabID>(collectionView: collectionView) { (collectionView, indexPath, item) -> UICollectionViewCell? in
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return collectionView.dequeueConfiguredReusableCell(using: registry, for: indexPath, item: item)
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}
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collectionView.dataSource = dataSource
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collectionView.delegate = self
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var snapshot = dataSource.snapshot()
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snapshot.appendSections([ 0 ])
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tabController.tabs.forEach { tab in
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snapshot.appendItems([ tab.identifier ])
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}
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dataSource.apply(snapshot)
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self.dataSource = dataSource
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self.collectionView = collectionView
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self.view = self.collectionView
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let newTabButton = UIBarButtonItem(systemItem: .add, primaryAction: UIAction(handler: { [weak self] _ in
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guard let self = self else { return }
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let newTab = self.tabController.createNewTab()
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self.delegate?.tabPicker(self, didSelectTab: newTab)
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}), menu: nil)
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navigationItem.rightBarButtonItem = newTabButton
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}
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func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
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let tab = tabController.tabs[indexPath.row]
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delegate?.tabPicker(self, didSelectTab: tab)
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}
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}
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