Shows detailed source “About” page when adding 3rd-party sources

Allows users to preview sources before adding them to their AltStore.

AltStore/Sources/SourceHeaderView.swift

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+//
+//  SourceHeaderView.swift
+//  AltStore
+//
+//  Created by Riley Testut on 3/9/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+import AltStoreCore
+import Roxas
+
+import Nuke
+
+class SourceHeaderView: RSTNibView
+{
+    @IBOutlet private(set) var titleLabel: UILabel!
+    @IBOutlet private(set) var subtitleLabel: UILabel!
+    @IBOutlet private(set) var iconImageView: UIImageView!
+    @IBOutlet private(set) var websiteButton: UIButton!
+    
+    @IBOutlet private var websiteContentView: UIView!
+    @IBOutlet private var websiteButtonContainerView: UIView!
+    @IBOutlet private var websiteImageView: UIImageView!
+    
+    @IBOutlet private var widthConstraint: NSLayoutConstraint!
+    
+    override init(frame: CGRect)
+    {
+        super.init(frame: frame)
+        
+        self.initialize()
+    }
+    
+    required init?(coder: NSCoder)
+    {
+        super.init(coder: coder)
+        
+        self.initialize()
+    }
+    
+    private func initialize()
+    {
+        self.clipsToBounds = true
+        self.layer.cornerRadius = 22
+        
+        self.iconImageView.clipsToBounds = true
+        
+        let fontDescriptor = UIFontDescriptor.preferredFontDescriptor(withTextStyle: .title3).withSymbolicTraits(.traitBold)!
+        let titleFont = UIFont(descriptor: fontDescriptor, size: 0.0)
+        self.titleLabel.font = titleFont
+        
+        self.websiteButton.setTitle(nil, for: .normal)
+        self.websiteButton.titleLabel?.font = UIFont.preferredFont(forTextStyle: .subheadline)
+        
+        let imageConfiguration = UIImage.SymbolConfiguration(scale: .medium)
+        let websiteImage = UIImage(systemName: "link", withConfiguration: imageConfiguration)
+        self.websiteImageView.image = websiteImage
+        
+        self.websiteButtonContainerView.clipsToBounds = true
+        self.websiteButtonContainerView.layer.cornerRadius = 14 // 22 - inset (8)
+    }
+    
+    override func layoutSubviews()
+    {
+        super.layoutSubviews()
+        
+        self.iconImageView.layer.cornerRadius = self.iconImageView.bounds.midY
+        
+        if let titleLabel = self.websiteButton.titleLabel, self.widthConstraint.constant == 0
+        {
+            // Left-align website button text with subtitle by increasing width by label inset.
+            let frame = self.websiteButton.convert(titleLabel.frame, from: titleLabel.superview)
+            self.widthConstraint.constant = frame.minX
+        }
+    }
+}
+
+extension SourceHeaderView
+{
+    func configure(for source: Source)
+    {
+        self.titleLabel.text = source.name
+        self.subtitleLabel.text = source.subtitle
+        
+        self.websiteImageView.tintColor = source.effectiveTintColor
+        
+        if let websiteURL = source.websiteURL
+        {
+            self.websiteButton.setTitle(websiteURL.absoluteString, for: .normal)
+            
+            self.websiteContentView.isHidden = false
+            self.websiteImageView.isHidden = false
+        }
+        else
+        {
+            self.websiteButton.setTitle(nil, for: .normal)
+            
+            self.websiteContentView.isHidden = true
+            self.websiteImageView.isHidden = true
+        }
+        
+        Nuke.loadImage(with: source.effectiveIconURL, into: self.iconImageView)
+    }
+}