session-ios/Session/Conversations/Message Cells/Content Views/MediaTextOverlayView.swift
2021-10-15 12:29:38 +11:00

74 lines
3.3 KiB
Swift

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