Repo created

iphone/Maps/UI/PlacePage/Components/WikiDescriptionViewController.swift

@@ -0,0 +1,70 @@
+protocol WikiDescriptionViewControllerDelegate: AnyObject {
+  func didPressMore()
+}
+
+class WikiDescriptionViewController: UIViewController {
+  @IBOutlet var descriptionTextView: UITextView!
+  @IBOutlet var moreButton: UIButton!
+
+  var descriptionHtml: String? {
+    didSet{
+      updateDescription()
+    }
+  }
+  weak var delegate: WikiDescriptionViewControllerDelegate?
+
+  override func viewDidLoad() {
+    super.viewDidLoad()
+
+    descriptionTextView.textContainerInset = .zero
+    updateDescription()
+  }
+
+  override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
+    super.traitCollectionDidChange(previousTraitCollection)
+    guard traitCollection.userInterfaceStyle != previousTraitCollection?.userInterfaceStyle else { return }
+    updateDescription()
+  }
+
+  private func updateDescription() {
+    guard let descriptionHtml = descriptionHtml else { return }
+
+    DispatchQueue.global().async {
+      let font = UIFont.regular14()
+      let color = UIColor.blackPrimaryText()
+      let paragraphStyle = NSMutableParagraphStyle()
+      paragraphStyle.lineSpacing = 4
+
+      let attributedString: NSAttributedString
+      if let str = NSMutableAttributedString(htmlString: descriptionHtml, baseFont: font, paragraphStyle: paragraphStyle) {
+        str.addAttribute(NSAttributedString.Key.foregroundColor,
+                         value: color,
+                         range: NSRange(location: 0, length: str.length))
+        attributedString = str;
+      } else {
+        attributedString = NSAttributedString(string: descriptionHtml,
+                                              attributes: [NSAttributedString.Key.font : font,
+                                                           NSAttributedString.Key.foregroundColor: color,
+                                                           NSAttributedString.Key.paragraphStyle: paragraphStyle])
+      }
+
+      DispatchQueue.main.async {
+        if attributedString.length > 500 {
+          self.descriptionTextView.attributedText = attributedString.attributedSubstring(from: NSRange(location: 0,
+                                                                                                       length: 500))
+        } else {
+          self.descriptionTextView.attributedText = attributedString
+        }
+      }
+    }
+  }
+
+  @IBAction func onMore(_ sender: UIButton) {
+    delegate?.didPressMore()
+  }
+  
+  override func applyTheme() {
+    super.applyTheme()
+    updateDescription()
+  }
+}