[AltStore] Adds redesigned AppViewController to view/download AltStore apps

AltStore/App Detail/AppContentViewController.swift

@@ -0,0 +1,178 @@
+//
+//  AppContentViewController.swift
+//  AltStore
+//
+//  Created by Riley Testut on 7/22/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+import Roxas
+
+extension AppContentViewController
+{
+    private enum Row: Int, CaseIterable
+    {
+        case subtitle
+        case screenshots
+        case description
+        case versionDescription
+        case permissions
+    }
+}
+
+class AppContentViewController: UITableViewController
+{
+    var app: App!
+    
+    private lazy var screenshotsDataSource = self.makeScreenshotsDataSource()
+    private lazy var permissionsDataSource = self.makePermissionsDataSource()
+    
+    @IBOutlet private var subtitleLabel: UILabel!
+    @IBOutlet private var descriptionTextView: CollapsingTextView!
+    @IBOutlet private var versionDescriptionTextView: CollapsingTextView!
+    
+    @IBOutlet private var screenshotsCollectionView: UICollectionView!
+    @IBOutlet private var permissionsCollectionView: UICollectionView!
+    
+    var preferredScreenshotSize: CGSize? {
+        guard let image = self.screenshotsDataSource.items.first else { return nil }
+        
+        let layout = self.screenshotsCollectionView.collectionViewLayout as! UICollectionViewFlowLayout
+        
+        let aspectRatio = image.size.height / image.size.width
+        
+        let width = self.screenshotsCollectionView.bounds.width - (layout.minimumInteritemSpacing * 2)
+        
+        let itemWidth = width / 1.5
+        let itemHeight = itemWidth * aspectRatio
+        
+        return CGSize(width: itemWidth, height: itemHeight)
+    }
+    
+    override func viewDidLoad()
+    {
+        super.viewDidLoad()
+        
+        self.tableView.contentInset.bottom = 20
+                
+        self.screenshotsCollectionView.dataSource = self.screenshotsDataSource
+        self.permissionsCollectionView.dataSource = self.permissionsDataSource
+        
+        self.subtitleLabel.text = self.app.subtitle
+        self.descriptionTextView.text = self.app.localizedDescription
+        self.versionDescriptionTextView.text = self.app.versionDescription
+        
+        self.descriptionTextView.maximumNumberOfLines = 5
+        self.descriptionTextView.moreButton.addTarget(self, action: #selector(AppContentViewController.toggleCollapsingSection(_:)), for: .primaryActionTriggered)
+        
+        self.versionDescriptionTextView.maximumNumberOfLines = 3
+        self.versionDescriptionTextView.moreButton.addTarget(self, action: #selector(AppContentViewController.toggleCollapsingSection(_:)), for: .primaryActionTriggered)
+    }
+    
+    override func viewDidLayoutSubviews()
+    {
+        super.viewDidLayoutSubviews()
+        
+        guard var size = self.preferredScreenshotSize else { return }
+        size.height = min(size.height, self.screenshotsCollectionView.bounds.height) // Silence temporary "item too tall" warning.
+        
+        let layout = self.screenshotsCollectionView.collectionViewLayout as! UICollectionViewFlowLayout
+        layout.itemSize = size
+    }
+    
+    override func prepare(for segue: UIStoryboardSegue, sender: Any?)
+    {
+        guard segue.identifier == "showPermission" else { return }
+        
+        guard let cell = sender as? UICollectionViewCell, let indexPath = self.permissionsCollectionView.indexPath(for: cell) else { return }
+        
+        let permission = self.permissionsDataSource.item(at: indexPath)
+        
+        let maximumWidth = self.view.bounds.width - 20
+        
+        let permissionPopoverViewController = segue.destination as! PermissionPopoverViewController
+        permissionPopoverViewController.permission = permission
+        permissionPopoverViewController.view.widthAnchor.constraint(lessThanOrEqualToConstant: maximumWidth).isActive = true
+        
+        let size = permissionPopoverViewController.view.systemLayoutSizeFitting(UIView.layoutFittingCompressedSize)
+        permissionPopoverViewController.preferredContentSize = size
+        
+        permissionPopoverViewController.popoverPresentationController?.delegate = self
+        permissionPopoverViewController.popoverPresentationController?.sourceRect = cell.frame
+        permissionPopoverViewController.popoverPresentationController?.sourceView = self.permissionsCollectionView
+    }
+}
+
+private extension AppContentViewController
+{
+    func makeScreenshotsDataSource() -> RSTArrayCollectionViewDataSource<UIImage>
+    {
+        let screenshots = self.app.screenshotNames.compactMap(UIImage.init(named:))
+        
+        let dataSource = RSTArrayCollectionViewDataSource(items: screenshots)
+        dataSource.cellConfigurationHandler = { (cell, screenshot, indexPath) in
+            let cell = cell as! ScreenshotCollectionViewCell
+            cell.imageView.image = screenshot
+        }
+        
+        return dataSource
+    }
+    
+    func makePermissionsDataSource() -> RSTArrayCollectionViewDataSource<AppPermission>
+    {        
+        let dataSource = RSTArrayCollectionViewDataSource(items: self.app.permissions)
+        dataSource.cellConfigurationHandler = { (cell, permission, indexPath) in
+            let cell = cell as! PermissionCollectionViewCell
+            cell.button.setImage(permission.type.icon, for: .normal)
+            cell.textLabel.text = permission.type.localizedShortName
+        }
+        
+        return dataSource
+    }
+}
+
+private extension AppContentViewController
+{
+    @objc func toggleCollapsingSection(_ sender: UIButton)
+    {
+        let indexPath: IndexPath
+        
+        switch sender
+        {
+        case self.descriptionTextView.moreButton: indexPath = IndexPath(row: Row.description.rawValue, section: 0)
+        case self.versionDescriptionTextView.moreButton: indexPath = IndexPath(row: Row.versionDescription.rawValue, section: 0)
+        default: return
+        }
+        
+        // Disable animations to prevent some potentially strange ones.
+        UIView.performWithoutAnimation {
+            self.tableView.reloadRows(at: [indexPath], with: .none)
+        }
+    }
+}
+
+extension AppContentViewController
+{
+    override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath)
+    {
+        cell.tintColor = self.app.tintColor
+    }
+    
+    override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
+    {
+        guard indexPath.row == Row.screenshots.rawValue else { return super.tableView(tableView, heightForRowAt: indexPath) }
+        
+        guard let size = self.preferredScreenshotSize else { return 0.0 }
+        return size.height
+    }
+}
+
+extension AppContentViewController: UIPopoverPresentationControllerDelegate
+{
+    func adaptivePresentationStyle(for controller: UIPresentationController, traitCollection: UITraitCollection) -> UIModalPresentationStyle
+    {
+        return .none
+    }
+}