93 lines
3.1 KiB
Swift
93 lines
3.1 KiB
Swift
//
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// AltTextViewController.swift
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// Mastodon
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//
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// Created by Jed Fox on 2022-11-26.
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//
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import SwiftUI
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class AltTextViewController: UIViewController {
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let textView = {
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let textView: UITextView
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if #available(iOS 16, *) {
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// TODO: update code below to use TextKit 2 when dropping iOS 15 support
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textView = UITextView(usingTextLayoutManager: false)
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} else {
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textView = UITextView()
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}
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textView.textContainer.maximumNumberOfLines = 0
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textView.textContainer.lineBreakMode = .byWordWrapping
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textView.font = .preferredFont(forTextStyle: .callout)
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textView.isScrollEnabled = true
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textView.backgroundColor = .clear
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textView.isOpaque = false
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textView.isEditable = false
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textView.tintColor = .white
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textView.textContainerInset = UIEdgeInsets(top: 12, left: 8, bottom: 8, right: 8)
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textView.contentInsetAdjustmentBehavior = .always
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textView.verticalScrollIndicatorInsets.bottom = 4
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return textView
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}()
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init(alt: String, sourceView: UIView?) {
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textView.text = alt
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super.init(nibName: nil, bundle: nil)
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self.modalPresentationStyle = .popover
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self.popoverPresentationController?.delegate = self
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self.popoverPresentationController?.permittedArrowDirections = .up
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self.popoverPresentationController?.sourceView = sourceView
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self.overrideUserInterfaceStyle = .dark
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}
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@MainActor required dynamic init?(coder aDecoder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func loadView() {
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super.loadView()
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view.translatesAutoresizingMaskIntoConstraints = false
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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textView.translatesAutoresizingMaskIntoConstraints = false
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view.backgroundColor = .systemBackground
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view.addSubview(textView)
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textView.pinToParent()
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NSLayoutConstraint.activate([
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textView.widthAnchor.constraint(lessThanOrEqualToConstant: 400),
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])
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}
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override func viewDidLayoutSubviews() {
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super.viewDidLayoutSubviews()
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UIView.performWithoutAnimation {
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let size = textView.layoutManager.boundingRect(forGlyphRange: NSMakeRange(0, (textView.textStorage.string as NSString).length), in: textView.textContainer).size
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preferredContentSize = CGSize(
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width: size.width + (8 + textView.textContainer.lineFragmentPadding) * 2,
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height: size.height + 12 + (textView.textContainer.lineFragmentPadding) * 2
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)
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}
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}
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override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
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super.traitCollectionDidChange(previousTraitCollection)
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textView.font = .preferredFont(forTextStyle: .callout)
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}
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}
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// MARK: UIPopoverPresentationControllerDelegate
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extension AltTextViewController: UIPopoverPresentationControllerDelegate {
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func adaptivePresentationStyle(for controller: UIPresentationController, traitCollection: UITraitCollection) -> UIModalPresentationStyle {
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.none
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}
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}
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