Fixed #6730: open apps preview should hide all screens in private browsing

Client/Frontend/Browser/BrowserViewController.swift

@@ -342,9 +342,11 @@ class BrowserViewController: UIViewController {
             return
         }
 
+        view.bringSubviewToFront(webViewContainerBackdrop)
         webViewContainerBackdrop.alpha = 1
         webViewContainer.alpha = 0
         urlBar.locationContainer.alpha = 0
+        firefoxHomeViewController?.view.alpha = 0
         topTabsViewController?.switchForegroundStatus(isInForeground: false)
         presentedViewController?.popoverPresentationController?.containerView?.alpha = 0
         presentedViewController?.view.alpha = 0
@@ -356,12 +358,14 @@ class BrowserViewController: UIViewController {
         UIView.animate(withDuration: 0.2, delay: 0, options: UIView.AnimationOptions(), animations: {
             self.webViewContainer.alpha = 1
             self.urlBar.locationContainer.alpha = 1
+            self.firefoxHomeViewController?.view.alpha = 1
             self.topTabsViewController?.switchForegroundStatus(isInForeground: true)
             self.presentedViewController?.popoverPresentationController?.containerView?.alpha = 1
             self.presentedViewController?.view.alpha = 1
             self.view.backgroundColor = UIColor.clear
         }, completion: { _ in
             self.webViewContainerBackdrop.alpha = 0
+            self.view.sendSubviewToBack(self.webViewContainerBackdrop)
         })
 
         // Re-show toolbar which might have been hidden during scrolling (prior to app moving into the background)
@@ -376,7 +380,7 @@ class BrowserViewController: UIViewController {
         KeyboardHelper.defaultHelper.addDelegate(self)
 
         webViewContainerBackdrop = UIView()
-        webViewContainerBackdrop.backgroundColor = UIColor.Photon.Grey50
+        webViewContainerBackdrop.backgroundColor = UIColor.Photon.Ink90
         webViewContainerBackdrop.alpha = 0
         view.addSubview(webViewContainerBackdrop)
 
@@ -484,7 +488,7 @@ class BrowserViewController: UIViewController {
         }
 
         webViewContainerBackdrop.snp.makeConstraints { make in
-            make.edges.equalTo(webViewContainer)
+            make.edges.equalTo(self.view)
         }
     }
 
@@ -540,7 +544,6 @@ class BrowserViewController: UIViewController {
 
     override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(animated)
-
         // On iPhone, if we are about to show the On-Boarding, blank out the tab so that it does
         // not flash before we present. This change of alpha also participates in the animation when
         // the intro view is dismissed.

Client/Frontend/Browser/TabTrayControllerV1.swift

@@ -45,6 +45,8 @@ class TabTrayControllerV1: UIViewController {
     var tabDisplayManager: TabDisplayManager!
     var tabCellIdentifer: TabDisplayer.TabCellIdentifer = TabCell.Identifier
     var otherBrowsingModeOffset = CGPoint.zero
+    // Backdrop used for displaying greyed background for private tabs
+    var webViewContainerBackdrop: UIView!
     var collectionView: UICollectionView!
 
     let statusBarBG = UIView()
@@ -161,6 +163,10 @@ class TabTrayControllerV1: UIViewController {
         super.viewDidLoad()
         tabManager.addDelegate(self)
         view.accessibilityLabel = NSLocalizedString("Tabs Tray", comment: "Accessibility label for the Tabs Tray view.")
+
+        webViewContainerBackdrop = UIView()
+        webViewContainerBackdrop.backgroundColor = UIColor.Photon.Ink90
+        webViewContainerBackdrop.alpha = 0
 
         collectionView.alwaysBounceVertical = true
         collectionView.backgroundColor = UIColor.theme.tabTray.background
@@ -173,7 +179,7 @@ class TabTrayControllerV1: UIViewController {
         searchBarHolder.addSubview(roundedSearchBarHolder)
         searchBarHolder.addSubview(searchBar)
         searchBarHolder.backgroundColor = UIColor.theme.tabTray.toolbar
-        [collectionView, toolbar, searchBarHolder, cancelButton].forEach { view.addSubview($0) }
+        [webViewContainerBackdrop, collectionView, toolbar, searchBarHolder, cancelButton].forEach { view.addSubview($0) }
         makeConstraints()
 
         // The statusBar needs a background color
@@ -222,6 +228,11 @@ class TabTrayControllerV1: UIViewController {
     }
 
     fileprivate func makeConstraints() {
+
+        webViewContainerBackdrop.snp.makeConstraints { make in
+            make.edges.equalTo(self.view)
+        }
+
         collectionView.snp.makeConstraints { make in
             make.left.equalTo(view.safeArea.left)
             make.right.equalTo(view.safeArea.right)
@@ -518,20 +529,26 @@ extension TabTrayControllerV1 {
 extension TabTrayControllerV1 {
     @objc func appWillResignActiveNotification() {
         if tabDisplayManager.isPrivate {
+            webViewContainerBackdrop.alpha = 1
+            view.bringSubviewToFront(webViewContainerBackdrop)
             collectionView.alpha = 0
             searchBarHolder.alpha = 0
+            emptyPrivateTabsView.alpha = 0
         }
     }
 
     @objc func appDidBecomeActiveNotification() {
         // Re-show any components that might have been hidden because they were being displayed
         // as part of a private mode tab
-        UIView.animate(withDuration: 0.2) {
+        UIView.animate(withDuration: 0.2, animations: {
             self.collectionView.alpha = 1
-
+            self.emptyPrivateTabsView.alpha = 1
             if self.tabDisplayManager.isPrivate, !self.privateTabsAreEmpty() {
                 self.searchBarHolder.alpha = 1
             }
+        }) { _ in
+            self.webViewContainerBackdrop.alpha = 0
+            self.view.sendSubviewToBack(self.webViewContainerBackdrop)
         }
     }
 }