Apply the post language to the AltViewController

Author: j-f1

Mastodon/Scene/MediaPreview/AltViewController.swift

@@ -20,21 +20,23 @@ class AltViewController: UIViewController {
 
         textView.textContainer.maximumNumberOfLines = 0
         textView.textContainer.lineBreakMode = .byWordWrapping
-        textView.font = .preferredFont(forTextStyle: .callout)
         textView.isScrollEnabled = true
         textView.backgroundColor = .clear
         textView.isOpaque = false
         textView.isEditable = false
-        textView.tintColor = .white
         textView.textContainerInset = UIEdgeInsets(top: 12, left: 8, bottom: 8, right: 8)
         textView.contentInsetAdjustmentBehavior = .always
         textView.verticalScrollIndicatorInsets.bottom = 4
 
         return textView
     }()
 
-    init(alt: String, sourceView: UIView?) {
-        textView.text = alt
+    init(alt: String, language: String?, sourceView: UIView?) {
+        textView.attributedText = NSAttributedString(string: alt, attributes: [
+            .languageIdentifier: "",
+            .foregroundColor: UIColor.white,
+            .font: UIFont.preferredFont(forTextStyle: .callout),
+        ])
         super.init(nibName: nil, bundle: nil)
         self.modalPresentationStyle = .popover
         self.popoverPresentationController?.delegate = self

Mastodon/Scene/MediaPreview/MediaPreviewViewController.swift

@@ -186,7 +186,7 @@ extension MediaPreviewViewController {
     @objc private func altButtonPressed(_ sender: UIButton) {
         guard let alt = viewModel.altText else { return }
 
-        present(AltViewController(alt: alt, sourceView: sender), animated: true)
+        present(AltViewController(alt: alt, language: viewModel.language, sourceView: sender), animated: true)
     }
 }
 

Mastodon/Scene/MediaPreview/MediaPreviewViewModel.swift

@@ -28,6 +28,7 @@ final class MediaPreviewViewModel: NSObject {
     @Published var currentPage: Int
     @Published var showingChrome = true
     @Published var altText: String?
+    @Published var language: String?
 
     // output
     let viewControllers: [MediaPreviewPage]
@@ -47,6 +48,7 @@ final class MediaPreviewViewModel: NSObject {
         switch item {
         case .attachment(let previewContext):
             getAltText = { previewContext.attachments[$0].altDescription }
+            self.language = previewContext.language
 
             currentPage = previewContext.initialIndex
             for (i, attachment) in previewContext.attachments.enumerated() {