From d7c52c4c180f0cd869a9a6747da25c7f78d4cc45 Mon Sep 17 00:00:00 2001
From: Amir Khorsandi <a.khorsandi@innovattic.com>
Date: Sun, 5 Jul 2020 15:47:33 +0200
Subject: [PATCH] Handle keyboard frame on iPad

---
 .../LayoutDesignerViewController.swift        | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/Samples/PagingLayoutSamples/Modules/LayoutDesigner/LayoutDesignerViewController.swift b/Samples/PagingLayoutSamples/Modules/LayoutDesigner/LayoutDesignerViewController.swift
index fedf729..9f48436 100644
--- a/Samples/PagingLayoutSamples/Modules/LayoutDesigner/LayoutDesignerViewController.swift
+++ b/Samples/PagingLayoutSamples/Modules/LayoutDesigner/LayoutDesignerViewController.swift
@@ -38,6 +38,11 @@ class LayoutDesignerViewController: UIViewController, ViewModelBased, NibBased {
         super.viewDidLoad()
         configureViews()
         setOptionsList()
+        registerKeyboardNotifications()
+    }
+    
+    deinit {
+        NotificationCenter.default.removeObserver(self)
     }
     
     
@@ -132,6 +137,27 @@ class LayoutDesignerViewController: UIViewController, ViewModelBased, NibBased {
         optionsTableView.optionViewModels = viewModel.optionViewModels
     }
     
+    private func registerKeyboardNotifications() {
+        let notificationCenter = NotificationCenter.default
+        notificationCenter.addObserver(self, selector: #selector(adjustForKeyboard), name: UIResponder.keyboardWillHideNotification, object: nil)
+        notificationCenter.addObserver(self, selector: #selector(adjustForKeyboard), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
+    }
+    
+    @objc private func adjustForKeyboard(notification: Notification) {
+        guard let keyboardValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else { return }
+        
+        let keyboardScreenEndFrame = keyboardValue.cgRectValue
+        let keyboardViewEndFrame = view.convert(keyboardScreenEndFrame, from: view.window)
+        var contentInset = optionsTableView.contentInset
+        
+        if keyboardViewEndFrame.minY < optionsTableView.frame.maxY {
+            contentInset.bottom = optionsTableView.frame.maxY - keyboardViewEndFrame.minY - 8
+        } else {
+            contentInset.bottom = 8
+        }
+        optionsTableView.contentInset = contentInset
+    }
+    
 }