Refactoring secure backup references.

Riot/Modules/SecureBackup/Setup/Intro/SecureBackupSetupIntroCell.swift

@@ -0,0 +1,157 @@
+/*
+ Copyright 2020 New Vector Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+import UIKit
+import Reusable
+
+final class SecureBackupSetupIntroCell: UIView, NibOwnerLoadable, Themable {
+    
+    // MARK: - Constants
+    
+    private enum ImageAlpha {
+        static let highlighted: CGFloat = 0.3
+    }
+    
+    // MARK: - Properties
+    
+    // MARK: Outlets
+    
+    @IBOutlet private weak var backgroundView: UIView!
+    @IBOutlet private weak var imageView: UIImageView!
+    @IBOutlet private weak var titleLabel: UILabel!
+    @IBOutlet private weak var informationLabel: UILabel!
+    @IBOutlet private weak var accessoryImageView: UIImageView!
+    @IBOutlet private weak var separatorView: UIView!
+    
+    // MARK: Private
+    
+    private var theme: Theme?
+    
+    private var isHighlighted: Bool = false {
+        didSet {
+            self.updateView()
+        }
+    }
+    
+    // MARK: Public
+    
+    var action: (() -> Void)?
+    
+    // MARK: Setup
+    
+    private func commonInit() {
+        self.setupGestureRecognizer()
+        
+        let accessoryTemplateImage = Asset.Images.disclosureIcon.image.withRenderingMode(.alwaysTemplate)
+        self.accessoryImageView.image = accessoryTemplateImage
+        self.accessoryImageView.highlightedImage = accessoryTemplateImage.vc_withAlpha(ImageAlpha.highlighted)
+    }
+    
+    convenience init() {
+        self.init(frame: CGRect.zero)
+        self.commonInit()
+    }
+    
+    required init?(coder aDecoder: NSCoder) {
+        super.init(coder: aDecoder)
+        self.loadNibContent()
+        self.commonInit()
+    }
+    
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        self.loadNibContent()
+        self.commonInit()
+    }
+    
+    // MARK: - Public
+    
+    func update(theme: Theme) {
+        self.theme = theme
+        
+        self.backgroundView.backgroundColor = theme.backgroundColor
+        self.imageView.tintColor = theme.textPrimaryColor
+        self.titleLabel.textColor = theme.tintColor
+        self.informationLabel.textColor = theme.textSecondaryColor
+        self.accessoryImageView.tintColor = theme.textSecondaryColor
+        self.separatorView.backgroundColor = theme.lineBreakColor
+        
+        self.updateView()
+    }
+    
+    func fill(title: String, information: String, image: UIImage) {
+        let templateImage = image.withRenderingMode(.alwaysTemplate)
+        
+        self.imageView.image = templateImage
+        self.imageView.highlightedImage = templateImage.vc_withAlpha(ImageAlpha.highlighted)
+        
+        self.titleLabel.text = title
+        self.informationLabel.text = information
+        
+        self.setupAccessibility(title: title, isEnabled: true)
+        self.updateView()
+    }
+    
+    // MARK: - Private
+    
+    private func setupAccessibility(title: String, isEnabled: Bool) {
+        self.isAccessibilityElement = true
+        self.accessibilityLabel = title
+        self.accessibilityTraits = .button
+        if !isEnabled {
+            self.accessibilityTraits.insert(.notEnabled)
+        }
+    }
+    
+    private func setupGestureRecognizer() {
+        let gestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(buttonAction(_:)))
+        gestureRecognizer.minimumPressDuration = 0
+        self.addGestureRecognizer(gestureRecognizer)
+    }
+    
+    private func updateView() {
+        
+        if let theme = self.theme {
+            self.backgroundView.backgroundColor = self.isHighlighted ? theme.overlayBackgroundColor : theme.backgroundColor
+        }
+        
+        self.imageView.isHighlighted = self.isHighlighted
+        self.accessoryImageView.isHighlighted = self.isHighlighted
+    }
+    
+    // MARK: - Actions
+    
+    @objc private func buttonAction(_ sender: UILongPressGestureRecognizer) {
+        
+        let isBackgroundViewTouched = sender.vc_isTouchingInside()
+        
+        switch sender.state {
+        case .began, .changed:
+            self.isHighlighted = isBackgroundViewTouched
+        case .ended:
+            self.isHighlighted = false
+            
+            if isBackgroundViewTouched {
+                self.action?()
+            }
+        case .cancelled:
+            self.isHighlighted = false
+        default:
+            break
+        }
+    }
+    
+}