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