metatext-app-ios-iphone-ipad/Views/UIKit/Content Views/ConversationView.swift

160 lines
6.4 KiB
Swift

// Copyright © 2020 Metabolist. All rights reserved.
import Mastodon
import UIKit
import ViewModels
final class ConversationView: UIView {
let avatarsView = ConversationAvatarsView()
let displayNamesLabel = UILabel()
let unreadIndicator = UIImageView(image: UIImage(
systemName: "circlebadge.fill",
withConfiguration: UIImage.SymbolConfiguration(scale: .small)))
let timeLabel = UILabel()
let statusBodyView = StatusBodyView()
private var conversationConfiguration: ConversationContentConfiguration
init(configuration: ConversationContentConfiguration) {
conversationConfiguration = configuration
super.init(frame: .zero)
initialSetup()
applyConversationConfiguration()
}
@available(*, unavailable)
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
extension ConversationView {
static func estimatedHeight(width: CGFloat,
identityContext: IdentityContext,
conversation: Conversation) -> CGFloat {
guard let status = conversation.lastStatus else { return UITableView.automaticDimension }
let bodyWidth = width - .defaultSpacing - .avatarDimension
return .defaultSpacing * 2
+ UIFont.preferredFont(forTextStyle: .headline).lineHeight
+ StatusBodyView.estimatedHeight(
width: bodyWidth,
identityContext: identityContext,
status: status,
configuration: .default)
}
}
extension ConversationView: UIContentView {
var configuration: UIContentConfiguration {
get { conversationConfiguration }
set {
guard let conversationConfiguration = newValue as? ConversationContentConfiguration else { return }
self.conversationConfiguration = conversationConfiguration
applyConversationConfiguration()
}
}
}
private extension ConversationView {
// swiftlint:disable:next function_body_length
func initialSetup() {
let containerStackView = UIStackView()
let sideStackView = UIStackView()
let mainStackView = UIStackView()
let namesTimeStackView = UIStackView()
addSubview(containerStackView)
containerStackView.translatesAutoresizingMaskIntoConstraints = false
containerStackView.spacing = .defaultSpacing
sideStackView.alignment = .top
sideStackView.spacing = .compactSpacing
sideStackView.addArrangedSubview(avatarsView)
containerStackView.addArrangedSubview(sideStackView)
namesTimeStackView.spacing = .compactSpacing
namesTimeStackView.alignment = .top
namesTimeStackView.addArrangedSubview(displayNamesLabel)
namesTimeStackView.addArrangedSubview(unreadIndicator)
namesTimeStackView.addArrangedSubview(timeLabel)
mainStackView.axis = .vertical
mainStackView.spacing = .compactSpacing
mainStackView.addArrangedSubview(namesTimeStackView)
mainStackView.addArrangedSubview(statusBodyView)
containerStackView.addArrangedSubview(mainStackView)
displayNamesLabel.font = .preferredFont(forTextStyle: .headline)
displayNamesLabel.adjustsFontForContentSizeCategory = true
displayNamesLabel.numberOfLines = 0
unreadIndicator.contentMode = .scaleAspectFit
unreadIndicator.setContentHuggingPriority(.required, for: .horizontal)
timeLabel.font = .preferredFont(forTextStyle: .subheadline)
timeLabel.adjustsFontForContentSizeCategory = true
timeLabel.textColor = .secondaryLabel
timeLabel.setContentCompressionResistancePriority(.required, for: .horizontal)
timeLabel.setContentHuggingPriority(.required, for: .horizontal)
statusBodyView.alpha = 0.5
statusBodyView.isUserInteractionEnabled = false
let avatarsHeightConstraint = avatarsView.heightAnchor.constraint(equalToConstant: .avatarDimension)
avatarsHeightConstraint.priority = .justBelowMax
NSLayoutConstraint.activate([
containerStackView.leadingAnchor.constraint(equalTo: readableContentGuide.leadingAnchor),
containerStackView.topAnchor.constraint(equalTo: readableContentGuide.topAnchor),
containerStackView.trailingAnchor.constraint(equalTo: readableContentGuide.trailingAnchor),
containerStackView.bottomAnchor.constraint(equalTo: readableContentGuide.bottomAnchor),
avatarsView.widthAnchor.constraint(equalToConstant: .avatarDimension),
avatarsHeightConstraint,
sideStackView.widthAnchor.constraint(equalToConstant: .avatarDimension)
])
isAccessibilityElement = true
}
func applyConversationConfiguration() {
let viewModel = conversationConfiguration.viewModel
let displayNames = ListFormatter.localizedString(byJoining: viewModel.accountViewModels.map(\.displayName))
let mutableDisplayNames = NSMutableAttributedString(string: displayNames)
mutableDisplayNames.insert(
emojis: viewModel.accountViewModels.map(\.emojis).reduce([], +),
view: displayNamesLabel)
mutableDisplayNames.resizeAttachments(toLineHeight: displayNamesLabel.font.lineHeight)
unreadIndicator.isHidden = !viewModel.isUnread
displayNamesLabel.attributedText = mutableDisplayNames
timeLabel.text = viewModel.statusViewModel?.time
timeLabel.accessibilityLabel = viewModel.statusViewModel?.accessibilityTime
statusBodyView.viewModel = viewModel.statusViewModel
avatarsView.viewModel = viewModel
let accessibilityAttributedLabel = NSMutableAttributedString(attributedString: mutableDisplayNames)
if viewModel.isUnread {
accessibilityAttributedLabel.appendWithSeparator(NSLocalizedString("conversation.unread", comment: ""))
}
if let statusBodyAccessibilityAttributedLabel = statusBodyView.accessibilityAttributedLabel {
accessibilityAttributedLabel.appendWithSeparator(statusBodyAccessibilityAttributedLabel)
}
if let accessibilityTime = viewModel.statusViewModel?.accessibilityTime {
accessibilityAttributedLabel.appendWithSeparator(accessibilityTime)
}
self.accessibilityAttributedLabel = accessibilityAttributedLabel
}
}