75 lines
3.3 KiB
Swift
75 lines
3.3 KiB
Swift
import UIKit
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/// Shown over a media message if it has a message body.
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final class MediaTextOverlayView : UIView {
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private let viewItem: ConversationViewItem
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private let albumViewWidth: CGFloat
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private let delegate: MessageCellDelegate
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private let textColor: UIColor
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var readMoreButton: UIButton?
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// MARK: Settings
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private static let maxHeight: CGFloat = 88;
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// MARK: Lifecycle
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init(viewItem: ConversationViewItem, albumViewWidth: CGFloat, textColor: UIColor, delegate: MessageCellDelegate) {
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self.viewItem = viewItem
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self.albumViewWidth = albumViewWidth
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self.delegate = delegate
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self.textColor = textColor
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super.init(frame: CGRect.zero)
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setUpViewHierarchy()
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}
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override init(frame: CGRect) {
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preconditionFailure("Use init(text:) instead.")
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}
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required init?(coder: NSCoder) {
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preconditionFailure("Use init(text:) instead.")
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}
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private func setUpViewHierarchy() {
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guard let message = viewItem.interaction as? TSMessage, let body = message.body, body.count > 0 else { return }
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// Body label
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let bodyLabel = UILabel()
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bodyLabel.numberOfLines = 0
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bodyLabel.lineBreakMode = .byTruncatingTail
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bodyLabel.text = given(body) { MentionUtilities.highlightMentions(in: $0, threadID: viewItem.interaction.uniqueThreadId) }
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bodyLabel.textColor = self.textColor
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bodyLabel.font = .systemFont(ofSize: Values.mediumFontSize)
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// Content stack view
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let contentStackView = UIStackView(arrangedSubviews: [ bodyLabel ])
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contentStackView.axis = .horizontal
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contentStackView.spacing = Values.smallSpacing
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addSubview(contentStackView)
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let inset: CGFloat = 12
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contentStackView.pin(.left, to: .left, of: self, withInset: inset)
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contentStackView.pin(.top, to: .top, of: self)
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contentStackView.pin(.right, to: .right, of: self, withInset: -inset)
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// Max height
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bodyLabel.heightAnchor.constraint(lessThanOrEqualToConstant: MediaTextOverlayView.maxHeight).isActive = true
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// Overflow button
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let bodyLabelTargetSize = bodyLabel.sizeThatFits(CGSize(width: albumViewWidth - 2 * inset, height: .greatestFiniteMagnitude))
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if bodyLabelTargetSize.height > MediaTextOverlayView.maxHeight {
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let readMoreButton = UIButton()
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self.readMoreButton = readMoreButton
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readMoreButton.setTitle("Read More", for: UIControl.State.normal)
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readMoreButton.titleLabel!.font = .boldSystemFont(ofSize: Values.smallFontSize)
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readMoreButton.setTitleColor(.white, for: UIControl.State.normal)
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readMoreButton.addTarget(self, action: #selector(readMore), for: UIControl.Event.touchUpInside)
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addSubview(readMoreButton)
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readMoreButton.pin(.left, to: .left, of: self, withInset: inset)
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readMoreButton.pin(.top, to: .bottom, of: contentStackView, withInset: Values.smallSpacing)
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readMoreButton.pin(.bottom, to: .bottom, of: self, withInset: -Values.smallSpacing)
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} else {
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contentStackView.pin(.bottom, to: .bottom, of: self, withInset: -inset)
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}
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}
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// MARK: Interaction
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@objc private func readMore() {
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delegate.showFullText(viewItem)
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}
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}
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