255 lines
10 KiB
Swift
255 lines
10 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 StatusBodyView: UIView {
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let spoilerTextLabel = AnimatedAttachmentLabel()
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let toggleShowContentButton = CapsuleButton()
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let contentTextView = TouchFallthroughTextView()
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let attachmentsView = AttachmentsView()
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let pollView = PollView()
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let cardView = CardView()
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var viewModel: StatusViewModel? {
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didSet {
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guard let viewModel = viewModel else { return }
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let isContextParent = viewModel.configuration.isContextParent
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let mutableContent = NSMutableAttributedString(attributedString: viewModel.content)
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let mutableSpoilerText = NSMutableAttributedString(string: viewModel.spoilerText)
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let contentFont = UIFont.preferredFont(forTextStyle: isContextParent ? .title3 : .callout)
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let contentRange = NSRange(location: 0, length: mutableContent.length)
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contentTextView.shouldFallthrough = !isContextParent
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mutableContent.removeAttribute(.font, range: contentRange)
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mutableContent.addAttributes(
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[.font: contentFont, .foregroundColor: UIColor.label],
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range: contentRange)
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mutableContent.insert(emojis: viewModel.contentEmojis,
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view: contentTextView,
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identityContext: viewModel.identityContext)
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mutableContent.resizeAttachments(toLineHeight: contentFont.lineHeight)
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contentTextView.attributedText = mutableContent
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contentTextView.isHidden = contentTextView.text.isEmpty
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mutableSpoilerText.insert(emojis: viewModel.contentEmojis,
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view: spoilerTextLabel,
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identityContext: viewModel.identityContext)
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mutableSpoilerText.resizeAttachments(toLineHeight: spoilerTextLabel.font.lineHeight)
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spoilerTextLabel.font = contentFont
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spoilerTextLabel.attributedText = mutableSpoilerText
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spoilerTextLabel.isHidden = spoilerTextLabel.text == ""
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toggleShowContentButton.setTitle(
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viewModel.shouldShowContent
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? NSLocalizedString("status.show-less", comment: "")
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: NSLocalizedString("status.show-more", comment: ""),
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for: .normal)
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toggleShowContentButton.isHidden = viewModel.spoilerText.isEmpty
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contentTextView.isHidden = !viewModel.shouldShowContent
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attachmentsView.isHidden = viewModel.attachmentViewModels.isEmpty
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attachmentsView.viewModel = viewModel
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pollView.isHidden = viewModel.pollOptions.isEmpty || !viewModel.shouldShowContent
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pollView.viewModel = viewModel
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pollView.isAccessibilityElement = !isContextParent || viewModel.hasVotedInPoll || viewModel.isPollExpired
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cardView.viewModel = viewModel.cardViewModel
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cardView.isHidden = viewModel.cardViewModel == nil || !viewModel.shouldShowContent
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accessibilityAttributedLabel = accessibilityAttributedLabel(forceShowContent: false)
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var accessibilityCustomActions = [UIAccessibilityCustomAction]()
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mutableContent.enumerateAttribute(
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.link,
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in: NSRange(location: 0, length: mutableContent.length),
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options: []) { attribute, range, _ in
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guard let url = attribute as? URL else { return }
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accessibilityCustomActions.append(
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UIAccessibilityCustomAction(
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name: String.localizedStringWithFormat(
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NSLocalizedString("accessibility.activate-link-%@", comment: ""),
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mutableContent.attributedSubstring(from: range).string)) { [weak self] _ in
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guard let contentTextView = self?.contentTextView else { return false }
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_ = contentTextView.delegate?.textView?(
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contentTextView,
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shouldInteractWith: url,
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in: range,
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interaction: .invokeDefaultAction)
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return true
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})
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}
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self.accessibilityCustomActions =
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accessibilityCustomActions + attachmentsView.attachmentViewAccessibilityCustomActions
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}
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}
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override init(frame: CGRect) {
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super.init(frame: frame)
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initialSetup()
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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 StatusBodyView {
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static func estimatedHeight(width: CGFloat,
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identityContext: IdentityContext,
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status: Status,
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configuration: CollectionItem.StatusConfiguration) -> CGFloat {
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let contentFont = UIFont.preferredFont(forTextStyle: configuration.isContextParent ? .title3 : .callout)
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var height: CGFloat = 0
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var contentHeight = status.displayStatus.content.attributed.string.height(
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width: width,
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font: contentFont)
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if status.displayStatus.card != nil {
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contentHeight += .compactSpacing
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contentHeight += CardView.estimatedHeight(
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width: width,
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identityContext: identityContext,
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status: status,
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configuration: configuration)
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}
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if status.displayStatus.poll != nil {
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contentHeight += .defaultSpacing
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contentHeight += PollView.estimatedHeight(
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width: width,
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identityContext: identityContext,
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status: status,
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configuration: configuration)
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}
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if status.displayStatus.spoilerText.isEmpty {
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height += contentHeight
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} else {
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height += status.displayStatus.spoilerText.height(width: width, font: contentFont)
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height += .compactSpacing
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height += NSLocalizedString("status.show-more", comment: "").height(
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width: width,
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font: .preferredFont(forTextStyle: .headline))
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if configuration.showContentToggled && !identityContext.identity.preferences.readingExpandSpoilers {
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height += .compactSpacing
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height += contentHeight
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}
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}
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if !status.displayStatus.mediaAttachments.isEmpty {
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height += .compactSpacing
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height += AttachmentsView.estimatedHeight(
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width: width,
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identityContext: identityContext,
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status: status,
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configuration: configuration)
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}
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return height
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}
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func accessibilityAttributedLabel(forceShowContent: Bool) -> NSAttributedString {
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let accessibilityAttributedLabel = NSMutableAttributedString(string: "")
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if !spoilerTextLabel.isHidden,
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let spoilerText = spoilerTextLabel.attributedText,
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let viewModel = viewModel,
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!viewModel.shouldShowContent,
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!forceShowContent {
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accessibilityAttributedLabel.appendWithSeparator(
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NSLocalizedString("status.content-warning.accessibility", comment: ""))
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accessibilityAttributedLabel.appendWithSeparator(spoilerText)
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} else if (!contentTextView.isHidden || forceShowContent), let content = contentTextView.attributedText {
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accessibilityAttributedLabel.append(content)
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}
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for view in [attachmentsView, pollView, cardView] where !view.isHidden {
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guard let viewAccessibilityLabel = view.accessibilityLabel else { continue }
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accessibilityAttributedLabel.appendWithSeparator(viewAccessibilityLabel)
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}
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return accessibilityAttributedLabel
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}
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}
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extension StatusBodyView: UITextViewDelegate {
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func textView(
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_ textView: UITextView,
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shouldInteractWith URL: URL,
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in characterRange: NSRange,
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interaction: UITextItemInteraction) -> Bool {
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switch interaction {
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case .invokeDefaultAction:
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viewModel?.urlSelected(URL)
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return false
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case .preview: return false
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case .presentActions: return false
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@unknown default: return false
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}
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}
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}
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private extension StatusBodyView {
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func initialSetup() {
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let stackView = UIStackView()
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addSubview(stackView)
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stackView.translatesAutoresizingMaskIntoConstraints = false
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stackView.axis = .vertical
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stackView.spacing = .defaultSpacing
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spoilerTextLabel.numberOfLines = 0
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spoilerTextLabel.adjustsFontForContentSizeCategory = true
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stackView.addArrangedSubview(spoilerTextLabel)
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toggleShowContentButton.addAction(
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UIAction { [weak self] _ in self?.viewModel?.toggleShowContent() },
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for: .touchUpInside)
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stackView.addArrangedSubview(toggleShowContentButton)
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contentTextView.adjustsFontForContentSizeCategory = true
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contentTextView.backgroundColor = .clear
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contentTextView.delegate = self
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stackView.addArrangedSubview(contentTextView)
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stackView.addArrangedSubview(attachmentsView)
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stackView.addArrangedSubview(pollView)
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cardView.button.addAction(
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UIAction { [weak self] _ in
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guard
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let viewModel = self?.viewModel,
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let url = viewModel.cardViewModel?.url
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else { return }
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viewModel.urlSelected(url)
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},
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for: .touchUpInside)
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stackView.addArrangedSubview(cardView)
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NSLayoutConstraint.activate([
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stackView.leadingAnchor.constraint(equalTo: leadingAnchor),
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stackView.topAnchor.constraint(equalTo: topAnchor),
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stackView.trailingAnchor.constraint(equalTo: trailingAnchor),
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stackView.bottomAnchor.constraint(equalTo: bottomAnchor)
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])
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}
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}
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