Extend title view for big titles

Example/Example/EditorDemoController.swift

@@ -39,26 +39,37 @@ class EditorDemoController: UIViewController {
         return textView
     }()
 
-    fileprivate(set) lazy var titleTextField: UITextField = {
-        let placeholderText = NSLocalizedString("Enter title here", comment: "Label for the title of the post field. Should be the same as WP core.")
-        let textField = UITextField()
+    fileprivate(set) lazy var titleTextField: UITextView = {        
+        let textField = UITextView()
 
         textField.accessibilityLabel = NSLocalizedString("Title", comment: "Post title")
-        textField.attributedPlaceholder = NSAttributedString(string: placeholderText,
-                                                      attributes: [NSForegroundColorAttributeName: UIColor.lightGray])
         textField.delegate = self
         textField.font = UIFont.preferredFont(forTextStyle: UIFontTextStyle.headline)
         textField.returnKeyType = .next
         textField.textColor = UIColor.darkText
         textField.translatesAutoresizingMaskIntoConstraints = false
-
+        textField.isScrollEnabled = false
         let toolbar = self.createToolbar(htmlMode: false)
         toolbar.enabled = false
         textField.inputAccessoryView = toolbar
 
         return textField
     }()
 
+    fileprivate(set) lazy var titlePlaceholderLabel: UILabel = {
+        let placeholderText = NSLocalizedString("Enter title here", comment: "Label for the title of the post field. Should be the same as WP core.")
+        let textField = UILabel()
+
+        textField.attributedText = NSAttributedString(string: placeholderText,
+                                                      attributes: [NSForegroundColorAttributeName: UIColor.lightGray, NSFontAttributeName: UIFont.preferredFont(forTextStyle: UIFontTextStyle.headline)])
+        textField.sizeToFit()
+        textField.translatesAutoresizingMaskIntoConstraints = false
+
+        return textField
+    }()
+
+    fileprivate var titleHeightConstraint: NSLayoutConstraint!
+
     fileprivate(set) lazy var separatorView: UIView = {
         let separatorView = UIView(frame: CGRect(x: 0, y: 0, width: 44, height: 1))
 
@@ -108,6 +119,7 @@ class EditorDemoController: UIViewController {
 
         view.backgroundColor = UIColor.white
         view.addSubview(titleTextField)
+        view.addSubview(titlePlaceholderLabel)
         view.addSubview(separatorView)
         view.addSubview(richTextView)
         view.addSubview(htmlTextView)
@@ -158,22 +170,42 @@ class EditorDemoController: UIViewController {
 
     }
 
+    // MARK: - Title and Title placeholder position methods
+    func updateTitleHeight() {
+        let sizeThatShouldFitTheContent = titleTextField.sizeThatFits(CGSize(width:view.frame.width - ( 2 * Constants.margin), height: CGFloat.greatestFiniteMagnitude))
+        let insets = titleTextField.textContainerInset
+        titleHeightConstraint.constant = max(sizeThatShouldFitTheContent.height, titleTextField.font!.lineHeight + insets.top + insets.bottom)
+    }
+
+    func updateTitlePlaceholderVisibility() {
+        self.titlePlaceholderLabel.isHidden = !titleTextField.text.isEmpty
+    }
 
     // MARK: - Configuration Methods
 
     private func configureConstraints() {
 
+        titleHeightConstraint = titleTextField.heightAnchor.constraint(equalToConstant: titleTextField.font!.lineHeight)
+        updateTitleHeight()
         NSLayoutConstraint.activate([
             titleTextField.leftAnchor.constraint(equalTo: view.leftAnchor, constant: Constants.margin),
             titleTextField.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -Constants.margin),
             titleTextField.topAnchor.constraint(equalTo: view.topAnchor, constant: Constants.margin),
-            titleTextField.heightAnchor.constraint(equalToConstant: titleTextField.font!.lineHeight)
+            titleHeightConstraint
+            ])
+
+        let insets = titleTextField.textContainerInset
+        NSLayoutConstraint.activate([
+            titlePlaceholderLabel.leftAnchor.constraint(equalTo: titleTextField.leftAnchor, constant: insets.left + titleTextField.textContainer.lineFragmentPadding),
+            titlePlaceholderLabel.rightAnchor.constraint(equalTo: titleTextField.rightAnchor, constant: -insets.right),
+            titlePlaceholderLabel.topAnchor.constraint(equalTo: titleTextField.topAnchor, constant: insets.top),
+            titlePlaceholderLabel.heightAnchor.constraint(equalToConstant: titleTextField.font!.lineHeight)
             ])
 
         NSLayoutConstraint.activate([
             separatorView.leftAnchor.constraint(equalTo: view.leftAnchor, constant: Constants.margin),
             separatorView.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -Constants.margin),
-            separatorView.topAnchor.constraint(equalTo: titleTextField.bottomAnchor, constant: Constants.margin),
+            separatorView.topAnchor.constraint(equalTo: titleTextField.bottomAnchor, constant: 0),
             separatorView.heightAnchor.constraint(equalToConstant: separatorView.frame.height)
             ])
 
@@ -317,7 +349,11 @@ extension EditorDemoController : UITextViewDelegate {
         changeRichTextInputView(to: nil)
     }
 
-    func textViewDidChange(_ textView: UITextView) {        
+    func textViewDidChange(_ textView: UITextView) {
+        if textView == titleTextField {
+            updateTitleHeight()
+            updateTitlePlaceholderVisibility()
+        }
     }
 }