113 lines
4.7 KiB
Swift
113 lines
4.7 KiB
Swift
//
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// ExpandThreadTableViewCell.swift
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// Tusker
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//
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// Created by Shadowfacts on 1/30/21.
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// Copyright © 2021 Shadowfacts. All rights reserved.
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//
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import UIKit
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class ExpandThreadTableViewCell: UITableViewCell {
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@IBOutlet weak var avatarContainerView: UIView!
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@IBOutlet weak var avatarContainerWidthConstraint: NSLayoutConstraint!
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@IBOutlet weak var replyCountLabel: UILabel!
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var avatarImageViews: [UIImageView] = []
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private var avatarRequests: [ImageCache.Request] = []
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override func awakeFromNib() {
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super.awakeFromNib()
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let prevThreadLinkView = UIView()
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prevThreadLinkView.translatesAutoresizingMaskIntoConstraints = false
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prevThreadLinkView.backgroundColor = tintColor.withAlphaComponent(0.5)
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prevThreadLinkView.layer.cornerRadius = 2.5
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prevThreadLinkView.layer.maskedCorners = [.layerMinXMaxYCorner, .layerMaxXMaxYCorner]
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contentView.addSubview(prevThreadLinkView)
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NSLayoutConstraint.activate([
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prevThreadLinkView.widthAnchor.constraint(equalToConstant: 5),
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prevThreadLinkView.centerXAnchor.constraint(equalTo: leadingAnchor, constant: 16 + 25),
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prevThreadLinkView.topAnchor.constraint(equalTo: topAnchor),
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prevThreadLinkView.bottomAnchor.constraint(equalTo: avatarContainerView.topAnchor, constant: -2),
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])
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NotificationCenter.default.addObserver(self, selector: #selector(preferencesChanged), name: .preferencesChanged, object: nil)
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}
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func updateUI(childThreads: [ConversationNode]) {
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let format = NSLocalizedString("expand threads count", comment: "expand conversation threads button label")
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replyCountLabel.text = String.localizedStringWithFormat(format, childThreads.count)
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let accounts = childThreads.map(\.status.account).uniques().prefix(3)
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avatarImageViews.forEach { $0.removeFromSuperview() }
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avatarImageViews = []
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avatarRequests = []
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let avatarImageSize: CGFloat = 44 - 12
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if accounts.count == 1 {
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avatarContainerWidthConstraint.constant = avatarImageSize
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} else {
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avatarContainerWidthConstraint.constant = CGFloat(accounts.count) * avatarImageSize * 3 / 4
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}
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for (index, account) in accounts.enumerated() {
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let accountImageView = UIImageView()
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accountImageView.translatesAutoresizingMaskIntoConstraints = false
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accountImageView.contentMode = .scaleAspectFit
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accountImageView.layer.cornerRadius = Preferences.shared.avatarStyle.cornerRadiusFraction * avatarImageSize
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accountImageView.layer.masksToBounds = true
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accountImageView.layer.borderWidth = 1
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accountImageView.layer.borderColor = UIColor.secondarySystemBackground.cgColor
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// need a solid background color so semi-transparent avatars don't look bad
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accountImageView.backgroundColor = .secondarySystemBackground
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avatarContainerView.addSubview(accountImageView)
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avatarImageViews.append(accountImageView)
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accountImageView.layer.zPosition = CGFloat(-index)
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let xConstraint: NSLayoutConstraint
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if index == 0 {
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xConstraint = accountImageView.leadingAnchor.constraint(equalTo: avatarContainerView.leadingAnchor)
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} else if index == accounts.count - 1 {
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xConstraint = accountImageView.trailingAnchor.constraint(equalTo: avatarContainerView.trailingAnchor)
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} else {
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xConstraint = accountImageView.centerXAnchor.constraint(equalTo: avatarContainerView.centerXAnchor)
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}
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NSLayoutConstraint.activate([
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accountImageView.widthAnchor.constraint(equalToConstant: avatarImageSize),
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accountImageView.heightAnchor.constraint(equalToConstant: avatarImageSize),
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accountImageView.centerYAnchor.constraint(equalTo: avatarContainerView.centerYAnchor),
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xConstraint
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])
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let req = ImageCache.avatars.get(account.avatar) { [weak accountImageView] (_, image) in
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DispatchQueue.main.async {
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accountImageView?.image = image
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}
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}
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if let req = req {
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avatarRequests.append(req)
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}
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}
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}
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@objc private func preferencesChanged() {
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avatarImageViews.forEach {
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$0.layer.cornerRadius = Preferences.shared.avatarStyle.cornerRadius(for: $0)
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}
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}
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override func prepareForReuse() {
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super.prepareForReuse()
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avatarRequests.forEach { $0.cancel() }
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}
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}
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