686 lines
27 KiB
Swift
686 lines
27 KiB
Swift
//
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// SaveStatesViewController.swift
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// Delta
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//
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// Created by Riley Testut on 1/23/16.
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// Copyright © 2016 Riley Testut. All rights reserved.
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//
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import UIKit
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import CoreData
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import DeltaCore
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import Roxas
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protocol SaveStatesViewControllerDelegate: class
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{
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func saveStatesViewController(_ saveStatesViewController: SaveStatesViewController, updateSaveState saveState: SaveState)
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func saveStatesViewController(_ saveStatesViewController: SaveStatesViewController, loadSaveState saveState: SaveStateProtocol)
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}
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extension SaveStatesViewController
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{
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enum Mode
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{
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case saving
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case loading
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}
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enum Section: Int
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{
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case auto
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case general
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case locked
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}
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}
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class SaveStatesViewController: UICollectionViewController
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{
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var game: Game! {
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didSet {
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self.updateDataSource()
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}
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}
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// Reference to a current EmulatorCore. emulatorCore.game does _not_ have to match self.game
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var emulatorCore: EmulatorCore?
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weak var delegate: SaveStatesViewControllerDelegate?
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var mode = Mode.loading
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var theme = Theme.translucent {
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didSet {
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if self.isViewLoaded
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{
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self.updateTheme()
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}
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}
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}
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fileprivate var vibrancyView: UIVisualEffectView!
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fileprivate var placeholderView: RSTPlaceholderView!
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fileprivate var prototypeCell = GridCollectionViewCell()
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fileprivate var prototypeCellWidthConstraint: NSLayoutConstraint!
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fileprivate var prototypeHeader = SaveStatesCollectionHeaderView()
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fileprivate let dataSource = RSTFetchedResultsCollectionViewDataSource<SaveState>(fetchedResultsController: NSFetchedResultsController())
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fileprivate let imageOperationQueue = RSTOperationQueue()
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fileprivate let imageCache = NSCache<NSURL, UIImage>()
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fileprivate var emulatorCoreSaveState: SaveStateProtocol?
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fileprivate let dateFormatter: DateFormatter
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required init?(coder aDecoder: NSCoder)
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{
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self.dateFormatter = DateFormatter()
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self.dateFormatter.timeStyle = .short
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self.dateFormatter.dateStyle = .short
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super.init(coder: aDecoder)
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}
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}
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extension SaveStatesViewController
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{
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override func viewDidLoad()
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{
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super.viewDidLoad()
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self.vibrancyView = UIVisualEffectView(effect: nil)
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self.placeholderView = RSTPlaceholderView(frame: CGRect(x: 0, y: 0, width: self.vibrancyView.bounds.width, height: self.vibrancyView.bounds.height))
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self.placeholderView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
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self.placeholderView.textLabel.text = NSLocalizedString("No Save States", comment: "")
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self.placeholderView.textLabel.textColor = UIColor.white
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self.placeholderView.detailTextLabel.textColor = UIColor.white
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self.vibrancyView.contentView.addSubview(self.placeholderView)
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self.dataSource.proxy = self
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self.dataSource.placeholderView = self.vibrancyView
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self.dataSource.cellConfigurationHandler = { [unowned self] (cell, item, indexPath) in
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self.configure(cell as! GridCollectionViewCell, for: indexPath)
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}
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self.collectionView?.dataSource = self.dataSource
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let collectionViewLayout = self.collectionViewLayout as! GridCollectionViewLayout
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let averageHorizontalInset = (collectionViewLayout.sectionInset.left + collectionViewLayout.sectionInset.right) / 2
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let portraitScreenWidth = UIScreen.main.coordinateSpace.convert(UIScreen.main.bounds, to: UIScreen.main.fixedCoordinateSpace).width
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// Use dimensions that allow two cells to fill the screen horizontally with padding in portrait mode
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// We'll keep the same size for landscape orientation, which will allow more to fit
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collectionViewLayout.itemWidth = (portraitScreenWidth - (averageHorizontalInset * 3)) / 2
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switch self.mode
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{
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case .saving:
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self.title = NSLocalizedString("Save State", comment: "")
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placeholderView.detailTextLabel.text = NSLocalizedString("You can create a new save state by pressing the + button in the top right.", comment: "")
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case .loading:
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self.title = NSLocalizedString("Load State", comment: "")
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placeholderView.detailTextLabel.text = NSLocalizedString("You can create a new save state by pressing the Save State option in the pause menu.", comment: "")
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self.navigationItem.rightBarButtonItem = nil
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}
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// Manually update prototype cell properties
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self.prototypeCellWidthConstraint = self.prototypeCell.contentView.widthAnchor.constraint(equalToConstant: collectionViewLayout.itemWidth)
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self.prototypeCellWidthConstraint.isActive = true
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let longPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(SaveStatesViewController.handleLongPressGesture(_:)))
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self.collectionView?.addGestureRecognizer(longPressGestureRecognizer)
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self.prepareEmulatorCoreSaveState()
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self.registerForPreviewing(with: self, sourceView: self.collectionView!)
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self.navigationController?.navigationBar.barStyle = .blackTranslucent
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self.navigationController?.toolbar.barStyle = .blackTranslucent
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self.updateTheme()
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}
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override func viewDidDisappear(_ animated: Bool)
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{
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super.viewDidDisappear(animated)
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self.resetEmulatorCoreIfNeeded()
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}
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override func didReceiveMemoryWarning()
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{
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super.didReceiveMemoryWarning()
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}
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}
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private extension SaveStatesViewController
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{
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//MARK: - Update -
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func updateDataSource()
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{
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let fetchRequest: NSFetchRequest<SaveState> = SaveState.fetchRequest()
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fetchRequest.returnsObjectsAsFaults = false
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fetchRequest.predicate = NSPredicate(format: "%K == %@", #keyPath(SaveState.game), self.game)
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fetchRequest.sortDescriptors = [NSSortDescriptor(key: #keyPath(SaveState.type), ascending: true), NSSortDescriptor(key: #keyPath(SaveState.creationDate), ascending: true)]
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self.dataSource.fetchedResultsController = NSFetchedResultsController(fetchRequest: fetchRequest, managedObjectContext: DatabaseManager.shared.viewContext, sectionNameKeyPath: #keyPath(SaveState.type), cacheName: nil)
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}
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func updateTheme()
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{
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switch self.theme
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{
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case .opaque:
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self.view.backgroundColor = UIColor.deltaDarkGray
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self.vibrancyView.effect = nil
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self.placeholderView.textLabel.textColor = UIColor.gray
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self.placeholderView.detailTextLabel.textColor = UIColor.gray
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case .translucent:
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self.view.backgroundColor = nil
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self.vibrancyView.effect = UIVibrancyEffect(blurEffect: UIBlurEffect(style: .dark))
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self.placeholderView.textLabel.textColor = UIColor.white
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self.placeholderView.detailTextLabel.textColor = UIColor.white
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}
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}
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//MARK: - Configure Views -
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func configure(_ cell: GridCollectionViewCell, for indexPath: IndexPath, ignoreExpensiveOperations ignoreOperations: Bool = false)
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{
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let saveState = self.dataSource.item(at: indexPath)
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cell.imageView.backgroundColor = UIColor.white
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cell.imageView.image = UIImage(named: "DeltaPlaceholder")
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cell.textLabel.textColor = UIColor.gray
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switch self.theme
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{
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case .opaque:
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cell.isTextLabelVibrancyEnabled = false
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cell.isImageViewVibrancyEnabled = false
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case .translucent:
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cell.isTextLabelVibrancyEnabled = true
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cell.isImageViewVibrancyEnabled = true
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}
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if !ignoreOperations
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{
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let imageOperation = LoadImageURLOperation(url: saveState.imageFileURL)
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imageOperation.resultsCache = self.imageCache
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imageOperation.resultHandler = { (image, error) in
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if let image = image
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{
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DispatchQueue.main.async {
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cell.imageView.backgroundColor = nil
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cell.imageView.image = image
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cell.isImageViewVibrancyEnabled = false
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}
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}
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}
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// Ensure initially visible cells have loaded their image before they appear to prevent potential flickering from placeholder to thumbnail
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if self.isAppearing
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{
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imageOperation.isImmediate = true
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}
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self.imageOperationQueue.addOperation(imageOperation, forKey: indexPath as NSCopying)
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}
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let deltaCore = Delta.core(for: self.game.type)!
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let dimensions = deltaCore.videoFormat.dimensions
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cell.maximumImageSize = CGSize(width: self.prototypeCellWidthConstraint.constant, height: (self.prototypeCellWidthConstraint.constant / dimensions.width) * dimensions.height)
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cell.textLabel.font = UIFont.preferredFont(forTextStyle: .subheadline)
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let name = saveState.name ?? self.dateFormatter.string(from: saveState.modifiedDate)
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cell.textLabel.text = name
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}
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func configure(_ headerView: SaveStatesCollectionHeaderView, forSection section: Int)
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{
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let section = self.correctedSectionForSectionIndex(section)
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let title: String
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switch section
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{
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case .auto: title = NSLocalizedString("Auto Save", comment: "")
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case .general: title = NSLocalizedString("General", comment: "")
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case .locked: title = NSLocalizedString("Locked", comment: "")
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}
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headerView.textLabel.text = title
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headerView.textLabel.textColor = UIColor.white
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switch self.theme
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{
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case .opaque: headerView.isTextLabelVibrancyEnabled = false
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case .translucent: headerView.isTextLabelVibrancyEnabled = true
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}
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}
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//MARK: - Gestures -
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@objc func handleLongPressGesture(_ gestureRecognizer: UILongPressGestureRecognizer)
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{
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guard gestureRecognizer.state == .began else { return }
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guard let indexPath = self.collectionView?.indexPathForItem(at: gestureRecognizer.location(in: self.collectionView)) else { return }
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let saveState = self.dataSource.item(at: indexPath)
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guard let actions = self.actionsForSaveState(saveState) else { return }
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let alertController = UIAlertController(actions: actions)
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self.present(alertController, animated: true, completion: nil)
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}
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//MARK: - Save States -
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@IBAction func addSaveState()
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{
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var saveState: SaveState!
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let backgroundContext = DatabaseManager.shared.newBackgroundContext()
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backgroundContext.performAndWait {
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let game = backgroundContext.object(with: self.game.objectID) as! Game
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saveState = SaveState.insertIntoManagedObjectContext(backgroundContext)
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saveState.game = game
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}
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self.updateSaveState(saveState)
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}
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func updateSaveState(_ saveState: SaveState)
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{
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// Switch back to self.emulatorCore
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self.prepareEmulatorCore()
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saveState.managedObjectContext?.performAndWait {
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self.delegate?.saveStatesViewController(self, updateSaveState: saveState)
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saveState.managedObjectContext?.saveWithErrorLogging()
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}
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}
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func loadSaveState(_ saveState: SaveStateProtocol)
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{
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// Stop previewGameViewController.emulatorCore, and switch to self.emulatorCore
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self.prepareEmulatorCore()
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self.delegate?.saveStatesViewController(self, loadSaveState: saveState)
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// Implicit assumption that loadSaveState will always result in SaveStatesViewController being dismissed
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// Mostly because the method used in updateSaveState(_:) to detect this doesn't work for peek/pop, and too lazy to care rn
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}
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func deleteSaveState(_ saveState: SaveState)
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{
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let confirmationAlertController = UIAlertController(title: NSLocalizedString("Delete Save State?", comment: ""), message: NSLocalizedString("Are you sure you want to delete this save state? This cannot be undone.", comment: ""), preferredStyle: .alert)
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confirmationAlertController.addAction(UIAlertAction(title: NSLocalizedString("Delete", comment: ""), style: .default, handler: { action in
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DatabaseManager.shared.performBackgroundTask { (context) in
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let temporarySaveState = context.object(with: saveState.objectID)
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context.delete(temporarySaveState)
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context.saveWithErrorLogging()
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}
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}))
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confirmationAlertController.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: ""), style: .cancel, handler: nil))
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self.present(confirmationAlertController, animated: true, completion: nil)
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}
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func renameSaveState(_ saveState: SaveState)
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{
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let alertController = UIAlertController(title: NSLocalizedString("Rename Save State", comment: ""), message: nil, preferredStyle: .alert)
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alertController.addTextField { (textField) in
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textField.text = saveState.name
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textField.placeholder = NSLocalizedString("Name", comment: "")
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textField.autocapitalizationType = .words
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textField.returnKeyType = .done
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}
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alertController.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: ""), style: .cancel, handler: nil))
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alertController.addAction(UIAlertAction(title: NSLocalizedString("Rename", comment: ""), style: .default, handler: { [unowned alertController] (action) in
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self.rename(saveState, with: alertController.textFields?.first?.text)
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}))
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self.present(alertController, animated: true, completion: nil)
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}
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func rename(_ saveState: SaveState, with name: String?)
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{
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var name = name
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if (name ?? "").characters.count == 0
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{
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// When text is nil, we know to show the timestamp instead
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name = nil
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}
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DatabaseManager.shared.performBackgroundTask { (context) in
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let saveState = context.object(with: saveState.objectID) as! SaveState
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saveState.name = name
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context.saveWithErrorLogging()
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}
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}
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func updatePreviewSaveState(_ saveState: SaveState?)
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{
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let alertController = UIAlertController(title: NSLocalizedString("Change Preview Save State?", comment: ""), message: NSLocalizedString("The Preview Save State is loaded whenever you preview this game from the Main Menu with 3D Touch. Are you sure you want to change it?", comment: ""), preferredStyle: .alert)
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alertController.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: ""), style: .cancel, handler: nil))
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alertController.addAction(UIAlertAction(title: NSLocalizedString("Change", comment: ""), style: .default, handler: { (action) in
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DatabaseManager.shared.performBackgroundTask { (context) in
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let game = context.object(with: self.game.objectID) as! Game
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if let saveState = saveState
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{
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let previewSaveState = context.object(with: saveState.objectID) as! SaveState
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game.previewSaveState = previewSaveState
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}
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else
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{
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game.previewSaveState = nil
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}
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context.saveWithErrorLogging()
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}
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}))
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self.present(alertController, animated: true, completion: nil)
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}
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func lockSaveState(_ saveState: SaveState)
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{
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let backgroundContext = DatabaseManager.shared.newBackgroundContext()
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backgroundContext.performAndWait() {
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let temporarySaveState = backgroundContext.object(with: saveState.objectID) as! SaveState
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temporarySaveState.type = .locked
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backgroundContext.saveWithErrorLogging()
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}
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}
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func unlockSaveState(_ saveState: SaveState)
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{
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let backgroundContext = DatabaseManager.shared.newBackgroundContext()
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backgroundContext.performAndWait() {
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let temporarySaveState = backgroundContext.object(with: saveState.objectID) as! SaveState
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temporarySaveState.type = .general
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backgroundContext.saveWithErrorLogging()
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}
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}
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//MARK: - Convenience Methods -
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func correctedSectionForSectionIndex(_ section: Int) -> Section
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{
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let sectionInfo = self.dataSource.fetchedResultsController.sections![section]
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let sectionIndex = Int(sectionInfo.name)!
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let section = Section(rawValue: sectionIndex)!
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return section
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}
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func actionsForSaveState(_ saveState: SaveState) -> [Action]?
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{
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guard saveState.type != .auto else { return nil }
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var actions = [Action]()
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if self.traitCollection.forceTouchCapability == .available
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{
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if saveState.game?.previewSaveState != saveState
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{
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let previewAction = Action(title: NSLocalizedString("Set as Preview Save State", comment: ""), style: .default, action: { [unowned self] action in
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self.updatePreviewSaveState(saveState)
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})
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actions.append(previewAction)
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}
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else
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{
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let previewAction = Action(title: NSLocalizedString("Remove as Preview Save State", comment: ""), style: .default, action: { [unowned self] action in
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self.updatePreviewSaveState(nil)
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})
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actions.append(previewAction)
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}
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}
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let cancelAction = Action(title: NSLocalizedString("Cancel", comment: ""), style: .cancel, action: nil)
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actions.append(cancelAction)
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let renameAction = Action(title: NSLocalizedString("Rename", comment: ""), style: .default, action: { [unowned self] action in
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self.renameSaveState(saveState)
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})
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actions.append(renameAction)
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switch saveState.type
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{
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case .auto: break
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case .general:
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let lockAction = Action(title: NSLocalizedString("Lock", comment: ""), style: .default, action: { [unowned self] action in
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self.lockSaveState(saveState)
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})
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actions.append(lockAction)
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case .locked:
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let unlockAction = Action(title: NSLocalizedString("Unlock", comment: ""), style: .default, action: { [unowned self] action in
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self.unlockSaveState(saveState)
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})
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actions.append(unlockAction)
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}
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let deleteAction = Action(title: NSLocalizedString("Delete", comment: ""), style: .destructive, action: { [unowned self] action in
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self.deleteSaveState(saveState)
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})
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actions.append(deleteAction)
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return actions
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}
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//MARK: - Emulator -
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func resetEmulatorCoreIfNeeded()
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{
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self.prepareEmulatorCore()
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if let saveState = self.emulatorCoreSaveState
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{
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// Remove temporary save state file
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do
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{
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try FileManager.default.removeItem(at: saveState.fileURL)
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}
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catch let error as NSError
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{
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print(error)
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}
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}
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}
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func prepareEmulatorCore()
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{
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// We stopped emulation for 3D Touch, so now we must resume emulation and load the save state we made to make it seem like it was never stopped
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// Additionally, if emulatorCore.state != .stopped, then we have already resumed emulation with correct save state, and don't need to do it again
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guard let emulatorCore = self.emulatorCore, emulatorCore.state == .stopped else { return }
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// Temporarily disable video rendering to prevent flickers
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emulatorCore.videoManager.isEnabled = false
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// Load the save state we stored a reference to
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emulatorCore.start()
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emulatorCore.pause()
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if let saveState = self.emulatorCoreSaveState
|
|
{
|
|
do
|
|
{
|
|
try emulatorCore.load(saveState)
|
|
}
|
|
catch EmulatorCore.SaveStateError.doesNotExist
|
|
{
|
|
print("Save State does not exist.")
|
|
}
|
|
catch let error as NSError
|
|
{
|
|
print(error)
|
|
}
|
|
}
|
|
|
|
// Re-enable video rendering
|
|
emulatorCore.videoManager.isEnabled = true
|
|
}
|
|
}
|
|
|
|
//MARK: - 3D Touch -
|
|
extension SaveStatesViewController: UIViewControllerPreviewingDelegate
|
|
{
|
|
fileprivate func prepareEmulatorCoreSaveState()
|
|
{
|
|
guard let emulatorCore = self.emulatorCore else { return }
|
|
|
|
// Store reference to current game state before we stop emulation so we can resume it if user decides to not load a save state
|
|
|
|
let fileURL = FileManager.uniqueTemporaryURL()
|
|
self.emulatorCoreSaveState = emulatorCore.saveSaveState(to: fileURL)
|
|
|
|
if self.emulatorCoreSaveState != nil
|
|
{
|
|
emulatorCore.stop()
|
|
}
|
|
}
|
|
|
|
func previewingContext(_ previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController?
|
|
{
|
|
guard
|
|
let indexPath = self.collectionView?.indexPathForItem(at: location),
|
|
let layoutAttributes = self.collectionViewLayout.layoutAttributesForItem(at: indexPath)
|
|
else { return nil }
|
|
|
|
guard self.emulatorCore == nil || (self.emulatorCore != nil && self.emulatorCoreSaveState != nil) else { return nil }
|
|
|
|
previewingContext.sourceRect = layoutAttributes.frame
|
|
|
|
let saveState = self.dataSource.item(at: indexPath)
|
|
let actions = self.actionsForSaveState(saveState)?.previewActions ?? []
|
|
let previewImage = self.imageCache.object(forKey: saveState.imageFileURL as NSURL) ?? UIImage(contentsOfFile: saveState.imageFileURL.path)
|
|
|
|
let previewGameViewController = PreviewGameViewController()
|
|
previewGameViewController.game = self.game
|
|
previewGameViewController.overridePreviewActionItems = actions
|
|
previewGameViewController.previewSaveState = saveState
|
|
previewGameViewController.previewImage = previewImage
|
|
|
|
return previewGameViewController
|
|
}
|
|
|
|
func previewingContext(_ previewingContext: UIViewControllerPreviewing, commit viewControllerToCommit: UIViewController)
|
|
{
|
|
let gameViewController = viewControllerToCommit as! PreviewGameViewController
|
|
gameViewController.emulatorCore?.pause()
|
|
|
|
let fileURL = FileManager.uniqueTemporaryURL()
|
|
if let saveState = gameViewController.emulatorCore?.saveSaveState(to: fileURL)
|
|
{
|
|
gameViewController.emulatorCore?.stop()
|
|
|
|
self.loadSaveState(saveState)
|
|
|
|
do
|
|
{
|
|
try FileManager.default.removeItem(at: fileURL)
|
|
}
|
|
catch
|
|
{
|
|
print(error)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//MARK: - <UICollectionViewDataSource> -
|
|
extension SaveStatesViewController
|
|
{
|
|
override func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView
|
|
{
|
|
let headerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "Header", for: indexPath) as! SaveStatesCollectionHeaderView
|
|
self.configure(headerView, forSection: indexPath.section)
|
|
return headerView
|
|
}
|
|
}
|
|
|
|
//MARK: - <UICollectionViewDelegate> -
|
|
extension SaveStatesViewController
|
|
{
|
|
override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
|
|
{
|
|
let saveState = self.dataSource.item(at: indexPath)
|
|
|
|
switch self.mode
|
|
{
|
|
case .saving:
|
|
|
|
let section = self.correctedSectionForSectionIndex((indexPath as NSIndexPath).section)
|
|
switch section
|
|
{
|
|
case .auto: break
|
|
case .general:
|
|
let backgroundContext = DatabaseManager.shared.newBackgroundContext()
|
|
backgroundContext.performAndWait() {
|
|
let temporarySaveState = backgroundContext.object(with: saveState.objectID) as! SaveState
|
|
self.updateSaveState(temporarySaveState)
|
|
}
|
|
|
|
case .locked:
|
|
let alertController = UIAlertController(title: NSLocalizedString("Cannot Modify Locked Save State", comment: ""), message: NSLocalizedString("This save state must first be unlocked before it can be modified.", comment: ""), preferredStyle: .alert)
|
|
alertController.addAction(UIAlertAction(title: NSLocalizedString("OK", comment: ""), style: .cancel, handler: nil))
|
|
self.present(alertController, animated: true, completion: nil)
|
|
|
|
}
|
|
|
|
case .loading: self.loadSaveState(saveState)
|
|
}
|
|
}
|
|
|
|
override func collectionView(_ collectionView: UICollectionView, didEndDisplaying cell: UICollectionViewCell, forItemAt indexPath: IndexPath)
|
|
{
|
|
let operation = self.imageOperationQueue[indexPath as NSCopying]
|
|
operation?.cancel()
|
|
}
|
|
}
|
|
|
|
//MARK: - <UICollectionViewDelegateFlowLayout> -
|
|
extension SaveStatesViewController: UICollectionViewDelegateFlowLayout
|
|
{
|
|
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize
|
|
{
|
|
// No need to load images from disk just to determine size, so we pass true for ignoreExpensiveOperations
|
|
self.configure(self.prototypeCell, for: indexPath, ignoreExpensiveOperations: true)
|
|
|
|
let size = self.prototypeCell.contentView.systemLayoutSizeFitting(UILayoutFittingCompressedSize)
|
|
return size
|
|
}
|
|
|
|
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize
|
|
{
|
|
self.configure(self.prototypeHeader, forSection: section)
|
|
|
|
let size = self.prototypeHeader.systemLayoutSizeFitting(UILayoutFittingCompressedSize)
|
|
return size
|
|
}
|
|
}
|