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