mastodon-ios/Mastodon/Scene/Compose/AutoComplete/AutoCompleteViewController....

123 lines
5.3 KiB
Swift

//
// AutoCompleteViewController.swift
// Mastodon
//
// Created by MainasuK Cirno on 2021-5-14.
//
import os.log
import UIKit
import Combine
protocol AutoCompleteViewControllerDelegate: AnyObject {
func autoCompleteViewController(_ viewController: AutoCompleteViewController, didSelectItem item: AutoCompleteItem)
}
final class AutoCompleteViewController: UIViewController {
static let chevronViewHeight: CGFloat = 24
var viewModel: AutoCompleteViewModel!
var disposeBag = Set<AnyCancellable>()
weak var delegate: AutoCompleteViewControllerDelegate?
let chevronView = AutoCompleteTopChevronView()
let containerBackgroundView: UIView = {
let view = UIView()
view.backgroundColor = ThemeService.shared.currentTheme.value.systemBackgroundColor
return view
}()
let tableView: UITableView = {
let tableView = ControlContainableTableView()
tableView.register(AutoCompleteTableViewCell.self, forCellReuseIdentifier: String(describing: AutoCompleteTableViewCell.self))
tableView.register(TimelineBottomLoaderTableViewCell.self, forCellReuseIdentifier: String(describing: TimelineBottomLoaderTableViewCell.self))
tableView.rowHeight = UITableView.automaticDimension
tableView.separatorStyle = .none
tableView.backgroundColor = .clear
tableView.contentInset.top = AutoCompleteViewController.chevronViewHeight
tableView.verticalScrollIndicatorInsets.top = AutoCompleteViewController.chevronViewHeight
tableView.showsVerticalScrollIndicator = false // avoid duplicate to the compose collection view indicator
tableView.preservesSuperviewLayoutMargins = false
tableView.cellLayoutMarginsFollowReadableWidth = false
return tableView
}()
}
extension AutoCompleteViewController {
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .clear
// we hack the view hierarchy. Do not preserve from superview
view.preservesSuperviewLayoutMargins = false
chevronView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(chevronView)
NSLayoutConstraint.activate([
chevronView.topAnchor.constraint(equalTo: view.topAnchor),
chevronView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
chevronView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
chevronView.heightAnchor.constraint(equalToConstant: AutoCompleteViewController.chevronViewHeight)
])
containerBackgroundView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(containerBackgroundView)
NSLayoutConstraint.activate([
containerBackgroundView.topAnchor.constraint(equalTo: chevronView.topAnchor),
containerBackgroundView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
containerBackgroundView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
containerBackgroundView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
])
view.bringSubviewToFront(chevronView)
containerBackgroundView.preservesSuperviewLayoutMargins = true
containerBackgroundView.isUserInteractionEnabled = true
tableView.translatesAutoresizingMaskIntoConstraints = false
containerBackgroundView.addSubview(tableView)
NSLayoutConstraint.activate([
tableView.topAnchor.constraint(equalTo: containerBackgroundView.topAnchor),
tableView.leadingAnchor.constraint(equalTo: containerBackgroundView.leadingAnchor),
tableView.trailingAnchor.constraint(equalTo: containerBackgroundView.trailingAnchor),
tableView.bottomAnchor.constraint(equalTo: containerBackgroundView.bottomAnchor),
])
tableView.delegate = self
viewModel.setupDiffableDataSource(for: tableView)
// bind to layout chevron
viewModel.symbolBoundingRect
.receive(on: DispatchQueue.main)
.sink { [weak self] symbolBoundingRect in
guard let self = self else { return }
self.chevronView.chevronMinX = symbolBoundingRect.midX - 0.5 * AutoCompleteTopChevronView.chevronSize.width
self.chevronView.setNeedsLayout()
self.containerBackgroundView.layer.mask = self.chevronView.invertMask(in: self.view.bounds)
}
.store(in: &disposeBag)
}
}
// MARK: - UITableViewDelegate
extension AutoCompleteViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: indexPath: %s", ((#file as NSString).lastPathComponent), #line, #function, indexPath.debugDescription)
tableView.deselectRow(at: indexPath, animated: true)
guard let diffableDataSource = viewModel.diffableDataSource else { return }
guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return }
delegate?.autoCompleteViewController(self, didSelectItem: item)
}
func tableView(_ tableView: UITableView, didHighlightRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
}
}