Autocomplete UI

App/Browser View/BrowserViewController.swift

@@ -10,7 +10,8 @@ import UniformTypeIdentifiers
 
 class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegate,
                              UITextFieldDelegate, ScriptPolicyViewControllerDelegate,
-                             UIPopoverPresentationControllerDelegate, TabDelegate, TabPickerViewControllerDelegate
+                             UIPopoverPresentationControllerDelegate, TabDelegate, TabPickerViewControllerDelegate,
+                             AutocompleteViewControllerDelegate
 {
     let browserView = BrowserView()
     var tab: Tab { didSet { didChangeTab(tab) } }
@@ -19,6 +20,8 @@ class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegat
     private let tabController = TabController()
     private let toolbarController = ToolbarViewController()
     
+    private let autocompleteViewController = AutocompleteViewController()
+    
     private var policyManager: ResourcePolicyManager { tabController.policyManager }
     
     override var canBecomeFirstResponder: Bool { true }
@@ -158,9 +161,18 @@ class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegat
             self.present(alert, animated: true, completion: nil)
         }), for: .touchUpInside)
         
+        // Cancel button: hide autocomplete if applicable
+        toolbarController.toolbarView.cancelButton.addAction(UIAction(handler: { [unowned self] _ in
+            self.autocompleteViewController.view.isHidden = true
+        }), for: .touchUpInside)
+        
         // TextField delegate
         toolbarController.urlBar.textField.delegate = self
         
+        // Autocomplete controller
+        autocompleteViewController.delegate = self
+        autocompleteViewController.view.isHidden = true
+        
         self.view = browserView
     }
     
@@ -195,6 +207,9 @@ class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegat
         // Change webView
         browserView.webView = webView
         
+        // Autocomplete view
+        browserView.autocompleteView = autocompleteViewController.collectionView
+        
         // Load progress
         updateLoadProgress(forWebView: webView)
         loadingObservation = webView.observe(\.estimatedProgress) { [unowned self] (webView, observedChange) in
@@ -272,6 +287,9 @@ class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegat
         tab.blockedScriptOrigins.removeAll()
         updateScriptBlockerButton()
         
+        // Blur url bar if applicable
+        toolbarController.urlBar.textField.resignFirstResponder()
+        
         updateTitleAndURL(forWebView: webView)
         
         if let url = webView.url {
@@ -327,7 +345,9 @@ class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegat
     func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
         if let text = textField.text {
             let matches = BrowserHistory.shared.visitedToplevelHistoryItems(matching: text)
-            print(matches)
+            autocompleteViewController.historyItems = matches
+            
+            autocompleteViewController.view.isHidden = matches.count == 0
         }
         
         return true
@@ -358,9 +378,14 @@ class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegat
             
             textField.resignFirstResponder()
         }
+        
         return false
     }
     
+    func textFieldDidEndEditing(_ textField: UITextField) {
+        autocompleteViewController.view.isHidden = true
+    }
+    
     // MARK: Tab Delegate
     
     func didBlockScriptOrigin(_ origin: String, forTab: Tab) {
@@ -396,4 +421,11 @@ class BrowserViewController: UIViewController, WKNavigationDelegate, WKUIDelegat
         tab.javaScriptEnabled = enabled
         toolbarController.scriptControllerIconView.shieldsDown = enabled
     }
+    
+    // MARK: Autocomplete Controller Delegate
+    
+    func autocompleteController(_: AutocompleteViewController, didSelectHistoryItem item: HistoryItem) {
+        tab.beginLoadingURL(item.url)
+        autocompleteViewController.view.isHidden = true
+    }
 }