1552 lines
56 KiB
Swift
1552 lines
56 KiB
Swift
// TODO: Anilist support?
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// TODO: Properly avoid swallowing of input from UICollectionView used for scrolling
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// TODO: Convert between state for normal and scrolling page turn
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// TODO: Support reading with scrolling and landscape mode
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// FIXME: Update comicCollectionView when switching between landscape and portrait mode
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import Foundation
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import UIKit
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let preloadCount = 2
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// With a whopping 2 cores, and 2 threads because no hyperthreading, it makes sense to only have a queue as an extra thread to do work with to allow the main thread for ui.
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let queue = DispatchQueue(label: "queue", qos: .utility)
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enum PageTurn {
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case next
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case previous
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}
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enum ReadProgress: Codable {
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case leftToRight(volumeIndex: Int, chapterIndex: Int, imageIndex: Int)
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case rightToLeft(volumeIndex: Int, chapterIndex: Int, imageIndex: Int)
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case scroll(CGPoint)
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}
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struct ProgressIndices {
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var v: Int
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var c: Int
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var i: Int
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}
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enum PageTurnMode: Codable {
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case leftToRight
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case rightToLeft
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case scroll
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}
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struct Comic {
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var cover: UIImage
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var metadata: Metadata
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var path: URL
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}
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struct GlobalState: Codable {
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var comicName: String? = nil
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}
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struct LocalState: Codable {
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var progress: ReadProgress
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var backgroundColor: String = "black"
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}
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struct Metadata: Codable {
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var title: String
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var original_language: String
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var last_volume: MetaValue
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var last_chapter: MetaValue
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var chapter_count: Int
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var publication_demographic: String
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var status: String
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var year: Int?
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var content_rating: String
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var state: String
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var created_at: String
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var updated_at: String
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var volumes: [VolumeMetadata]
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}
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struct VolumeMetadata: Codable {
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var volume: MetaValue
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var name: String?
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var chapters: [ChapterMetadata]
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}
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struct ChapterMetadata: Codable {
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var chapter: MetaValue
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var name: String?
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var images: [ImageMetadata]
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}
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struct ImageMetadata: Codable {
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var doublePage: Bool
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var fileName: String
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var firstPage: Int
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}
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struct MetaValue: Codable {
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var main: Int
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var bonus: Int?
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}
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class ViewController: UIViewController, UIGestureRecognizerDelegate {
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var homeView = UIView()
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var readerView = UIView()
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@IBOutlet var scrollingCollectionView: UICollectionView!
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var scrollPos: CGPoint!
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var hasSetContentOffset = false
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var pageCount = 0
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var pagesAvailable = 0
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var sizeList: [CGSize] = []
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var chapterAndPages: [(Int, Int)] = []
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var imageView = UIImageView()
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var mode = PageTurnMode.leftToRight
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var metadata: Metadata!
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var currentPage: Int!
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var progress = ProgressIndices(v: 0, c: 0, i: 0)
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var currentPath: URL!
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var changedOrientation = false
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var leftTap: UITapGestureRecognizer!
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var rightTap: UITapGestureRecognizer!
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var topTap: UITapGestureRecognizer!
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let leftView = UIView()
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let rightView = UIView()
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let topView = UIView()
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let topBarView = UIView()
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let bottomBarView = UIView()
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let info = UILabel()
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let pageTurnDropdownView = UIView()
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let pageTurnDropdownButton = UIButton()
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let backgroundColorDropdownView = UIView()
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let backgroundColorDropdownButton = UIButton()
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let homeButton = UIButton()
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let fileManager = FileManager.default
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var globalState = getGlobalState()
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let documentsURL = getDocumentsURL().unsafelyUnwrapped
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var comics: [Comic] = []
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@IBOutlet var comicCollectionView: UICollectionView!
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let imageLoader = ImageLoader()
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override func viewDidLoad() {
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super.viewDidLoad()
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view.backgroundColor = .white
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setup()
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}
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func setup() {
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do {
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if try fileManager.contentsOfDirectory(atPath: documentsURL.path).isEmpty {
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saveGlobalState()
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}
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} catch {
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saveGlobalState()
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}
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homeView.translatesAutoresizingMaskIntoConstraints = false
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readerView.translatesAutoresizingMaskIntoConstraints = false
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readerView.isHidden = true
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readerView.backgroundColor = .black
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homeView.isHidden = false
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view.addSubview(homeView)
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view.addSubview(readerView)
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NSLayoutConstraint.activate([
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homeView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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homeView.topAnchor.constraint(equalTo: view.topAnchor),
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homeView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
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homeView.widthAnchor.constraint(equalTo: view.widthAnchor),
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readerView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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readerView.topAnchor.constraint(equalTo: view.topAnchor),
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readerView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
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readerView.widthAnchor.constraint(equalTo: view.widthAnchor),
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])
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loadComics()
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setupImageView()
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setupScrollingCollectionView()
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setupGestures()
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setupBar()
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setupHomeView()
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if let name = globalState.comicName {
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readComic(name: name)
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} else {
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print("no comic?")
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}
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}
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func setupHomeView() {
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let layout = UICollectionViewFlowLayout()
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let spacing: CGFloat = 8
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layout.minimumInteritemSpacing = spacing
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layout.minimumLineSpacing = spacing
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comicCollectionView = UICollectionView(frame: view.bounds, collectionViewLayout: layout)
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comicCollectionView.translatesAutoresizingMaskIntoConstraints = false
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comicCollectionView.dataSource = self
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comicCollectionView.delegate = self
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comicCollectionView.backgroundColor = .white
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comicCollectionView.register(
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ComicImageCell.self, forCellWithReuseIdentifier: "ComicImageCell"
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)
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homeView.addSubview(comicCollectionView)
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}
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func loadComics() {
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do {
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var directories: [URL] = []
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let contents = try fileManager.contentsOfDirectory(
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at: documentsURL,
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includingPropertiesForKeys: [.isDirectoryKey],
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options: [.skipsHiddenFiles]
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)
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directories = contents.filter { url in
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var isDirectory: ObjCBool = false
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return fileManager.fileExists(atPath: url.path, isDirectory: &isDirectory)
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&& isDirectory.boolValue
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}.sorted { $0.path < $1.path }
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for dir in directories {
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if !fileManager.fileExists(
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atPath: dir.appendingPathComponent(
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"metadata.json"
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).path)
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{
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getMetadataFromFileName(path: dir)
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}
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currentPath = dir
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metadata = try JSONDecoder().decode(
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Metadata.self,
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from:
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Data(
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String(
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contentsOfFile: dir.appendingPathComponent(
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"metadata.json"
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)
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.path
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).utf8)
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)
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loadLocalState()
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comics.append(
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Comic(
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cover: UIImage(contentsOfFile: getImagePath(progress: ProgressIndices(v: progress.v, c: 0, i: 0)).path)!,
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metadata: metadata,
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path: dir
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))
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}
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} catch {
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print("Failed to read directories")
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}
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}
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func saveGlobalState() {
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do {
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try JSONEncoder().encode(globalState).write(
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to: documentsURL.appendingPathComponent("state.json"))
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} catch {
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print("failed to save global state")
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}
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}
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func convertColorToString(color: UIColor) -> String {
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let r: String!
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switch color {
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case .white: r = "white"
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case .gray: r = "gray"
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case .black: r = "black"
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case .red: r = "red"
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case .blue: r = "blue"
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default: r = "black"
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}
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return r
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}
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func convertStringToColor(str: String) -> UIColor {
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let r: UIColor!
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switch str {
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case "white": r = .white
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case "gray": r = .gray
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case "black": r = .black
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case "red": r = .red
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case "blue": r = .blue
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default: r = .black
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}
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return r
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}
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func getMetadataFromFileName(path: URL) {
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// Beautiful, is it not?
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let pattern = "c([0-9]+(?:x[0-9]+)?) \\(v([0-9]+)\\) - p([0-9]+(?:-[0-9]+)?)"
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var currentVolume: Int! = nil
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var currentChapter: (Int, Int?)!
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let outFileName = "metadata.json"
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if fileManager.fileExists(
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atPath: path.appendingPathComponent(outFileName).absoluteString)
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{
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print("skipped metadata file creation")
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return
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}
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var newMetadata = Metadata(
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title: "",
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original_language: "",
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last_volume: MetaValue(main: 0, bonus: nil),
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last_chapter: MetaValue(main: 0, bonus: nil),
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chapter_count: 0,
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publication_demographic: "",
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status: "",
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year: nil,
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content_rating: "",
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state: "",
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created_at: "",
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updated_at: "",
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volumes: []
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)
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do {
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let regex = try NSRegularExpression(pattern: pattern)
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let dir = path.appendingPathComponent("images")
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let fileURLs = try fileManager.contentsOfDirectory(
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at: dir,
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includingPropertiesForKeys: [.isRegularFileKey],
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options: [.skipsHiddenFiles]
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)
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let fileNames = fileURLs.map { $0.lastPathComponent }.sorted()
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for fileName in fileNames {
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let range = NSRange(fileName.startIndex..., in: fileName)
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if let match = regex.firstMatch(in: fileName, range: range) {
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let chapterStr = (fileName as NSString).substring(with: match.range(at: 1))
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let chapterParts = chapterStr.split(separator: "x", maxSplits: 1)
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let chapter = (
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Int(chapterParts[0])!, chapterParts.count > 1 ? Int(chapterParts[1])! : nil
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)
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let volume = Int((fileName as NSString).substring(with: match.range(at: 2)))!
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let pageStr = (fileName as NSString).substring(with: match.range(at: 3))
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let pageParts = pageStr.split(separator: "-", maxSplits: 1)
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let (page, doublePage) = (
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Int(pageParts[0])!, pageParts.count > 1
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)
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if currentVolume != nil {
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if volume != currentVolume {
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newMetadata.chapter_count += 1
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assert(volume > currentVolume)
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newMetadata.volumes.append(
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VolumeMetadata(
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volume: MetaValue(main: volume, bonus: nil), name: nil,
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chapters: [
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ChapterMetadata(
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chapter: MetaValue(
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main: chapter.0, bonus: chapter.1
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),
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name: "",
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images: [
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ImageMetadata(
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doublePage: doublePage, fileName: fileName,
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firstPage: page
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),
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]
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),
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]
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))
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} else if chapter != currentChapter {
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newMetadata.chapter_count += 1
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if chapter.0 == currentChapter.0 {
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assert(chapter.1! == currentChapter.1 ?? 1)
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} else {
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assert(chapter.0 == currentChapter.0 + 1)
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}
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newMetadata.volumes[newMetadata.volumes.count - 1].chapters.append(
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ChapterMetadata(
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chapter: MetaValue(main: chapter.0, bonus: chapter.1),
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name: "",
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images: [
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ImageMetadata(
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doublePage: doublePage, fileName: fileName,
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firstPage: page
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),
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]
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))
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} else {
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newMetadata.volumes[newMetadata.volumes.count - 1].chapters[
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newMetadata.volumes[newMetadata.volumes.count - 1].chapters.count - 1
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].images.append(
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ImageMetadata(
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doublePage: doublePage, fileName: fileName, firstPage: page
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)
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)
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}
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} else {
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newMetadata.chapter_count += 1
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newMetadata.volumes.append(
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VolumeMetadata(
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volume: MetaValue(main: volume, bonus: nil), name: nil,
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chapters: [
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ChapterMetadata(
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chapter: MetaValue(main: chapter.0, bonus: chapter.1),
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name: "",
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images: [
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ImageMetadata(
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doublePage: doublePage, fileName: fileName,
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firstPage: page
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),
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]
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),
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]
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))
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}
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currentVolume = volume
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currentChapter = chapter
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}
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}
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} catch {
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print("failed reading image file names")
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}
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metadata = newMetadata
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do {
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let encoder = JSONEncoder()
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encoder.outputFormatting = [.prettyPrinted]
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encoder.keyEncodingStrategy = .useDefaultKeys
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try encoder.encode(
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newMetadata
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).write(
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to: path.appendingPathComponent(outFileName))
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} catch {
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print("failed to save generated metadata")
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}
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}
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func saveLocalState() {
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let color = readerView.backgroundColor ?? .black
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let screenSize = UIScreen.main.bounds.size
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var scrollOffset = scrollingCollectionView.contentOffset
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if screenSize.width > screenSize.height {
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scrollOffset.y *= (screenSize.height / screenSize.width)
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}
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var newProgress =
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ReadProgress.leftToRight(
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volumeIndex: progress.v, chapterIndex: progress.c,
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imageIndex: progress.i
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)
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switch mode {
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case .leftToRight:
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newProgress = ReadProgress.leftToRight(
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volumeIndex: progress.v, chapterIndex: progress.c,
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imageIndex: progress.i
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)
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case .rightToLeft: newProgress = ReadProgress.rightToLeft(
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volumeIndex: progress.v, chapterIndex: progress.c,
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imageIndex: progress.i
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)
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case .scroll: newProgress = ReadProgress.scroll(scrollOffset)
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}
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queue.async {
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do {
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try JSONEncoder().encode(
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LocalState(
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progress: newProgress, backgroundColor: self.convertColorToString(color: color)
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)
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).write(
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to: self.currentPath.appendingPathComponent("state.json"))
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} catch {
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print("failed to save local state")
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}
|
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}
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}
|
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|
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func loadLocalState() {
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do {
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let json = try Data(
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String(
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contentsOfFile: currentPath.appendingPathComponent("state.json").path
|
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).utf8)
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let local = try JSONDecoder().decode(LocalState.self, from: json)
|
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switch local.progress {
|
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case let .leftToRight(volumeIndex, chapterIndex, imageIndex):
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progress.v = volumeIndex
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progress.c = chapterIndex
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progress.i = imageIndex
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mode = .leftToRight
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case let .rightToLeft(volumeIndex, chapterIndex, imageIndex):
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progress.v = volumeIndex
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progress.c = chapterIndex
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progress.i = imageIndex
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mode = .rightToLeft
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case let .scroll(point):
|
|
if scrollPos == nil {
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scrollPos = point
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|
let screenSize = UIScreen.main.bounds.size
|
|
var scrollOffset = point
|
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if screenSize.width > screenSize.height {
|
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scrollOffset.y *= (screenSize.width / screenSize.height)
|
|
}
|
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if let indexPath = scrollingCollectionView.indexPathForItem(at: scrollOffset) {
|
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var theProgress = ProgressIndices(v: 0, c: 0, i: 0)
|
|
for _ in 0 ... indexPath.item {
|
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theProgress = getProgressIndicesFromTurn(
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turn: .next, progress: theProgress
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)
|
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}
|
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progress = theProgress
|
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}
|
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}
|
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mode = .scroll
|
|
}
|
|
readerView.backgroundColor = convertStringToColor(str: local.backgroundColor)
|
|
} catch let decodingError as DecodingError {
|
|
print(decodingError.errorDescription!)
|
|
} catch {
|
|
print("Unexpected error: \(error)")
|
|
}
|
|
}
|
|
|
|
func setupGestures() {
|
|
let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(handleSwipe(_:)))
|
|
swipeLeft.direction = .left
|
|
readerView.addGestureRecognizer(swipeLeft)
|
|
|
|
let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(handleSwipe(_:)))
|
|
swipeRight.direction = .right
|
|
readerView.addGestureRecognizer(swipeRight)
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|
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setupTapZones()
|
|
}
|
|
|
|
func scrollViewDidScroll(_: UIScrollView) {
|
|
if scrollingCollectionView.isHidden { return }
|
|
let centerPoint = CGPoint(
|
|
x: scrollingCollectionView.bounds.midX + scrollingCollectionView.contentOffset.x,
|
|
y: scrollingCollectionView.bounds.midY + scrollingCollectionView.contentOffset.y
|
|
)
|
|
|
|
if let indexPath = scrollingCollectionView.indexPathForItem(at: centerPoint) {
|
|
let (chapter, page) = chapterAndPages[indexPath.item]
|
|
progress.c = chapter
|
|
progress.i = page
|
|
}
|
|
if scrollingCollectionView.isHidden == false {
|
|
saveLocalState()
|
|
}
|
|
}
|
|
|
|
override func viewDidLayoutSubviews() {
|
|
super.viewDidLayoutSubviews()
|
|
if scrollingCollectionView.isHidden == true || mode != .scroll
|
|
|| scrollingCollectionView.contentSize == .zero
|
|
{
|
|
return
|
|
}
|
|
if !hasSetContentOffset, scrollPos != nil {
|
|
let screenSize = UIScreen.main.bounds.size
|
|
var offset = scrollPos!
|
|
if screenSize.width > screenSize.height {
|
|
offset.y *= (screenSize.width / screenSize.height)
|
|
}
|
|
scrollingCollectionView.setContentOffset(offset, animated: false)
|
|
hasSetContentOffset = true
|
|
} else if changedOrientation {
|
|
changedOrientation = false
|
|
let screenSize = UIScreen.main.bounds.size
|
|
var offset = scrollingCollectionView.contentOffset
|
|
offset.y *= (screenSize.width / screenSize.height)
|
|
scrollingCollectionView.setContentOffset(offset, animated: false)
|
|
}
|
|
}
|
|
|
|
func readComic(name: String) {
|
|
readerView.isHidden = false
|
|
homeView.isHidden = true
|
|
setNeedsStatusBarAppearanceUpdate()
|
|
if let path = getPathFromComicName(name: name) {
|
|
currentPath = path
|
|
|
|
metadata = getMetadata(path: path)!
|
|
|
|
globalState.comicName = metadata.title
|
|
saveGlobalState()
|
|
loadLocalState()
|
|
if mode != .scroll {
|
|
scrollingCollectionView.isHidden = true
|
|
leftView.isHidden = false
|
|
rightView.isHidden = false
|
|
setImages(path: path)
|
|
} else {
|
|
setupScrolling()
|
|
}
|
|
} else {
|
|
print("path not found")
|
|
}
|
|
}
|
|
|
|
func setupScrolling() {
|
|
leftView.isHidden = true
|
|
rightView.isHidden = true
|
|
scrollingCollectionView.isHidden = false
|
|
// TODO: Fix scrolling again
|
|
}
|
|
|
|
func countFiles() -> Int {
|
|
var count = 0
|
|
if let enumerator = fileManager.enumerator(
|
|
at: currentPath, includingPropertiesForKeys: [.isDirectoryKey],
|
|
options: [.skipsHiddenFiles]
|
|
) {
|
|
for case let dir as URL in enumerator {
|
|
do {
|
|
if let enumerator = fileManager.enumerator(
|
|
at: dir, includingPropertiesForKeys: [.isRegularFileKey],
|
|
options: [.skipsHiddenFiles]
|
|
) {
|
|
for case let file as URL in enumerator {
|
|
let resourceValues = try file.resourceValues(forKeys: [
|
|
.isRegularFileKey,
|
|
])
|
|
if resourceValues.isRegularFile == true {
|
|
count += 1
|
|
}
|
|
}
|
|
}
|
|
|
|
} catch {
|
|
print("Error reading file attributes for \(dir):", error)
|
|
}
|
|
}
|
|
}
|
|
return count
|
|
}
|
|
|
|
func setupScrollingCollectionView() {
|
|
let layout = UICollectionViewFlowLayout()
|
|
layout.minimumInteritemSpacing = 0
|
|
layout.minimumLineSpacing = 0
|
|
scrollingCollectionView = UICollectionView(
|
|
frame: view.bounds, collectionViewLayout: layout
|
|
)
|
|
scrollingCollectionView.translatesAutoresizingMaskIntoConstraints = false
|
|
scrollingCollectionView.dataSource = self
|
|
scrollingCollectionView.delegate = self
|
|
scrollingCollectionView.backgroundColor = .white
|
|
scrollingCollectionView.isHidden = true
|
|
scrollingCollectionView.register(
|
|
ScrollingImageCell.self, forCellWithReuseIdentifier: "ScrollingImageCell"
|
|
)
|
|
readerView.addSubview(scrollingCollectionView)
|
|
|
|
NSLayoutConstraint.activate([
|
|
scrollingCollectionView.topAnchor.constraint(equalTo: readerView.topAnchor),
|
|
scrollingCollectionView.leadingAnchor.constraint(equalTo: readerView.leadingAnchor),
|
|
scrollingCollectionView.trailingAnchor.constraint(equalTo: readerView.trailingAnchor),
|
|
scrollingCollectionView.heightAnchor.constraint(equalTo: readerView.heightAnchor),
|
|
])
|
|
}
|
|
|
|
func setupTapZones() {
|
|
leftView.translatesAutoresizingMaskIntoConstraints = false
|
|
rightView.translatesAutoresizingMaskIntoConstraints = false
|
|
topView.translatesAutoresizingMaskIntoConstraints = false
|
|
|
|
readerView.addSubview(leftView)
|
|
readerView.addSubview(rightView)
|
|
readerView.addSubview(topView)
|
|
|
|
NSLayoutConstraint.activate([
|
|
leftView.leadingAnchor.constraint(equalTo: readerView.leadingAnchor),
|
|
leftView.topAnchor.constraint(equalTo: readerView.topAnchor),
|
|
leftView.bottomAnchor.constraint(equalTo: readerView.bottomAnchor),
|
|
leftView.widthAnchor.constraint(equalTo: readerView.widthAnchor, multiplier: 0.5),
|
|
|
|
rightView.trailingAnchor.constraint(equalTo: readerView.trailingAnchor),
|
|
rightView.topAnchor.constraint(equalTo: readerView.topAnchor),
|
|
rightView.bottomAnchor.constraint(equalTo: readerView.bottomAnchor),
|
|
rightView.widthAnchor.constraint(equalTo: readerView.widthAnchor, multiplier: 0.5),
|
|
|
|
topView.topAnchor.constraint(equalTo: readerView.topAnchor),
|
|
topView.leadingAnchor.constraint(equalTo: readerView.leadingAnchor),
|
|
topView.trailingAnchor.constraint(equalTo: readerView.trailingAnchor),
|
|
topView.heightAnchor.constraint(equalTo: readerView.heightAnchor, multiplier: 0.2),
|
|
])
|
|
|
|
leftView.backgroundColor = .clear
|
|
rightView.backgroundColor = .clear
|
|
topView.backgroundColor = .clear
|
|
|
|
leftTap = UITapGestureRecognizer(target: self, action: #selector(handleLeftTap))
|
|
rightTap = UITapGestureRecognizer(target: self, action: #selector(handleRightTap))
|
|
topTap = UITapGestureRecognizer(target: self, action: #selector(handleTopTap))
|
|
|
|
leftTap.delegate = self
|
|
rightTap.delegate = self
|
|
topTap.delegate = self
|
|
|
|
leftView.addGestureRecognizer(leftTap)
|
|
rightView.addGestureRecognizer(rightTap)
|
|
topView.addGestureRecognizer(topTap)
|
|
}
|
|
|
|
func setupBar() {
|
|
topBarView.translatesAutoresizingMaskIntoConstraints = false
|
|
topBarView.backgroundColor = UIColor.black.withAlphaComponent(0.8)
|
|
topBarView.isHidden = true
|
|
readerView.addSubview(topBarView)
|
|
|
|
bottomBarView.translatesAutoresizingMaskIntoConstraints = false
|
|
bottomBarView.backgroundColor = UIColor.black.withAlphaComponent(0.8)
|
|
bottomBarView.isHidden = true
|
|
readerView.addSubview(bottomBarView)
|
|
|
|
NSLayoutConstraint.activate([
|
|
topBarView.topAnchor.constraint(equalTo: readerView.topAnchor),
|
|
topBarView.leadingAnchor.constraint(equalTo: readerView.leadingAnchor),
|
|
topBarView.trailingAnchor.constraint(equalTo: readerView.trailingAnchor),
|
|
topBarView.heightAnchor.constraint(equalToConstant: 64),
|
|
|
|
bottomBarView.bottomAnchor.constraint(equalTo: readerView.bottomAnchor),
|
|
bottomBarView.leadingAnchor.constraint(equalTo: readerView.leadingAnchor),
|
|
bottomBarView.trailingAnchor.constraint(equalTo: readerView.trailingAnchor),
|
|
bottomBarView.heightAnchor.constraint(equalToConstant: 128),
|
|
])
|
|
|
|
setupBackgroundColorDropdown()
|
|
setupPageTurnDropdown()
|
|
setupHomeButton()
|
|
setupBottomBarInfo()
|
|
}
|
|
|
|
func setupBottomBarInfo() {
|
|
info.textAlignment = .center
|
|
info.numberOfLines = 6
|
|
info.translatesAutoresizingMaskIntoConstraints = false
|
|
info.textColor = .white
|
|
bottomBarView.addSubview(info)
|
|
NSLayoutConstraint.activate([
|
|
info.topAnchor.constraint(equalTo: bottomBarView.topAnchor),
|
|
info.bottomAnchor.constraint(equalTo: bottomBarView.bottomAnchor),
|
|
info.leadingAnchor.constraint(equalTo: bottomBarView.leadingAnchor),
|
|
info.trailingAnchor.constraint(equalTo: bottomBarView.trailingAnchor),
|
|
info.centerXAnchor.constraint(equalTo: bottomBarView.centerXAnchor),
|
|
info.centerYAnchor.constraint(equalTo: bottomBarView.centerYAnchor),
|
|
])
|
|
}
|
|
|
|
func setupHomeButton() {
|
|
homeButton.setTitle("Home", for: .normal)
|
|
homeButton.setTitleColor(.white, for: .normal)
|
|
homeButton.translatesAutoresizingMaskIntoConstraints = false
|
|
topBarView.addSubview(homeButton)
|
|
|
|
homeButton.addTarget(
|
|
self, action: #selector(goHome), for: .touchDown
|
|
)
|
|
NSLayoutConstraint.activate([
|
|
homeButton.trailingAnchor.constraint(equalTo: topBarView.trailingAnchor, constant: -32),
|
|
homeButton.centerYAnchor.constraint(equalTo: topBarView.centerYAnchor),
|
|
homeButton.topAnchor.constraint(equalTo: topBarView.topAnchor),
|
|
homeButton.bottomAnchor.constraint(equalTo: topBarView.bottomAnchor),
|
|
])
|
|
}
|
|
|
|
override var prefersStatusBarHidden: Bool {
|
|
return homeView.isHidden
|
|
}
|
|
|
|
@objc func goHome() {
|
|
readerView.isHidden = true
|
|
homeView.isHidden = false
|
|
globalState.comicName = nil
|
|
hideBar()
|
|
|
|
setNeedsStatusBarAppearanceUpdate()
|
|
saveGlobalState()
|
|
}
|
|
|
|
func setupBackgroundColorDropdown() {
|
|
backgroundColorDropdownButton.setTitle("Background color ▼", for: .normal)
|
|
backgroundColorDropdownButton.setTitleColor(.white, for: .normal)
|
|
backgroundColorDropdownButton.translatesAutoresizingMaskIntoConstraints = false
|
|
topBarView.addSubview(backgroundColorDropdownButton)
|
|
|
|
backgroundColorDropdownButton.addTarget(
|
|
self, action: #selector(toggleBackgroundColorDropdown), for: .touchDown
|
|
)
|
|
|
|
backgroundColorDropdownView.backgroundColor = UIColor.darkGray
|
|
backgroundColorDropdownView.translatesAutoresizingMaskIntoConstraints = false
|
|
backgroundColorDropdownView.isHidden = true
|
|
readerView.addSubview(backgroundColorDropdownView)
|
|
|
|
let stackView = UIStackView()
|
|
stackView.axis = .vertical
|
|
stackView.spacing = 8
|
|
stackView.distribution = .fillEqually
|
|
stackView.translatesAutoresizingMaskIntoConstraints = false
|
|
stackView.isLayoutMarginsRelativeArrangement = true
|
|
stackView.layoutMargins = UIEdgeInsets(top: 8, left: 0, bottom: 8, right: 0)
|
|
backgroundColorDropdownView.addSubview(stackView)
|
|
|
|
let colorOptions = ["White", "Gray", "Black", "Red", "Blue"]
|
|
for title in colorOptions {
|
|
let button = UIButton(type: .system)
|
|
button.setTitle(title, for: .normal)
|
|
button.setTitleColor(.white, for: .normal)
|
|
button.contentHorizontalAlignment = .left
|
|
button.contentEdgeInsets = UIEdgeInsets(top: 0, left: 8, bottom: 0, right: 0)
|
|
button.backgroundColor = .clear
|
|
button.translatesAutoresizingMaskIntoConstraints = false
|
|
button.addTarget(
|
|
self, action: #selector(handleBackgroundColorOption), for: .touchDown
|
|
)
|
|
stackView.addArrangedSubview(button)
|
|
}
|
|
|
|
NSLayoutConstraint.activate([
|
|
backgroundColorDropdownButton.leadingAnchor.constraint(
|
|
equalTo: topBarView.leadingAnchor, constant: 32
|
|
),
|
|
backgroundColorDropdownButton.centerYAnchor.constraint(
|
|
equalTo: topBarView.centerYAnchor),
|
|
backgroundColorDropdownButton.topAnchor.constraint(
|
|
equalTo: topBarView.topAnchor),
|
|
backgroundColorDropdownButton.bottomAnchor.constraint(
|
|
equalTo: topBarView.bottomAnchor),
|
|
|
|
backgroundColorDropdownView.topAnchor.constraint(
|
|
equalTo: backgroundColorDropdownButton.bottomAnchor),
|
|
backgroundColorDropdownView.leadingAnchor.constraint(
|
|
equalTo: backgroundColorDropdownButton.leadingAnchor),
|
|
backgroundColorDropdownView.trailingAnchor.constraint(
|
|
equalTo: backgroundColorDropdownButton.trailingAnchor),
|
|
|
|
stackView.topAnchor.constraint(
|
|
equalTo: backgroundColorDropdownView.topAnchor),
|
|
stackView.bottomAnchor.constraint(equalTo: backgroundColorDropdownView.bottomAnchor),
|
|
stackView.leadingAnchor.constraint(equalTo: backgroundColorDropdownView.leadingAnchor),
|
|
stackView.trailingAnchor.constraint(
|
|
equalTo: backgroundColorDropdownView.trailingAnchor),
|
|
])
|
|
}
|
|
|
|
func setupPageTurnDropdown() {
|
|
pageTurnDropdownButton.setTitle("Page Turn Mode ▼", for: .normal)
|
|
pageTurnDropdownButton.setTitleColor(.white, for: .normal)
|
|
pageTurnDropdownButton.translatesAutoresizingMaskIntoConstraints = false
|
|
topBarView.addSubview(pageTurnDropdownButton)
|
|
|
|
pageTurnDropdownButton.addTarget(
|
|
self, action: #selector(togglePageTurnDropdown), for: .touchDown
|
|
)
|
|
|
|
pageTurnDropdownView.backgroundColor = UIColor.darkGray
|
|
pageTurnDropdownView.translatesAutoresizingMaskIntoConstraints = false
|
|
pageTurnDropdownView.isHidden = true
|
|
readerView.addSubview(pageTurnDropdownView)
|
|
|
|
let stackView = UIStackView()
|
|
stackView.axis = .vertical
|
|
stackView.spacing = 8
|
|
stackView.distribution = .fillEqually
|
|
stackView.translatesAutoresizingMaskIntoConstraints = false
|
|
stackView.isLayoutMarginsRelativeArrangement = true
|
|
stackView.layoutMargins = UIEdgeInsets(top: 8, left: 0, bottom: 8, right: 0)
|
|
pageTurnDropdownView.addSubview(stackView)
|
|
|
|
let pageTurnOptions = ["Left to right", "Right to left", "Scroll"]
|
|
for title in pageTurnOptions {
|
|
let button = UIButton(type: .system)
|
|
button.setTitle(title, for: .normal)
|
|
button.setTitleColor(.white, for: .normal)
|
|
button.contentHorizontalAlignment = .left
|
|
button.backgroundColor = .clear
|
|
button.translatesAutoresizingMaskIntoConstraints = false
|
|
button.contentEdgeInsets = UIEdgeInsets(top: 0, left: 8, bottom: 0, right: 0)
|
|
button.addTarget(
|
|
self, action: #selector(handlePageTurnOption), for: .touchDown
|
|
)
|
|
stackView.addArrangedSubview(button)
|
|
}
|
|
|
|
NSLayoutConstraint.activate([
|
|
pageTurnDropdownButton.leadingAnchor.constraint(
|
|
equalTo: backgroundColorDropdownButton.trailingAnchor, constant: 32
|
|
),
|
|
pageTurnDropdownButton.centerYAnchor.constraint(
|
|
equalTo: topBarView.centerYAnchor),
|
|
pageTurnDropdownButton.topAnchor.constraint(
|
|
equalTo: topBarView.topAnchor),
|
|
pageTurnDropdownButton.bottomAnchor.constraint(
|
|
equalTo: topBarView.bottomAnchor),
|
|
|
|
pageTurnDropdownView.topAnchor.constraint(
|
|
equalTo: pageTurnDropdownButton.bottomAnchor),
|
|
pageTurnDropdownView.leadingAnchor.constraint(
|
|
equalTo: pageTurnDropdownButton.leadingAnchor),
|
|
pageTurnDropdownView.trailingAnchor.constraint(
|
|
equalTo: pageTurnDropdownButton.trailingAnchor),
|
|
|
|
stackView.topAnchor.constraint(
|
|
equalTo: pageTurnDropdownView.topAnchor),
|
|
stackView.bottomAnchor.constraint(equalTo: pageTurnDropdownView.bottomAnchor),
|
|
stackView.leadingAnchor.constraint(equalTo: pageTurnDropdownView.leadingAnchor),
|
|
stackView.trailingAnchor.constraint(
|
|
equalTo: pageTurnDropdownView.trailingAnchor),
|
|
])
|
|
}
|
|
|
|
@objc func handlePageTurnOption(_ sender: UIButton) {
|
|
if let title = sender.currentTitle {
|
|
let prev = mode
|
|
switch title.lowercased() {
|
|
case "left to right": mode = .leftToRight
|
|
case "right to left": mode = .rightToLeft
|
|
case "scroll": mode = .scroll
|
|
default: break
|
|
}
|
|
if prev == mode { return }
|
|
if mode == .scroll {
|
|
setupScrolling()
|
|
} else {
|
|
imageLoader.loadImage(
|
|
at: getImagePath(progress: progress),
|
|
scaling: .scaleAspectFit
|
|
) { [weak self] image in
|
|
self?.imageView.image = image
|
|
}
|
|
}
|
|
}
|
|
scrollingCollectionView.isHidden = mode != .scroll
|
|
leftView.isHidden = mode == .scroll
|
|
rightView.isHidden = mode == .scroll
|
|
togglePageTurnDropdown()
|
|
saveLocalState()
|
|
}
|
|
|
|
@objc func handleBackgroundColorOption(_ sender: UIButton) {
|
|
if let title = sender.currentTitle {
|
|
switch title.lowercased() {
|
|
case "white": readerView.backgroundColor = .white
|
|
case "gray": readerView.backgroundColor = .gray
|
|
case "black": readerView.backgroundColor = .black
|
|
case "red": readerView.backgroundColor = .red
|
|
case "blue": readerView.backgroundColor = .blue
|
|
default: break
|
|
}
|
|
}
|
|
toggleBackgroundColorDropdown()
|
|
saveLocalState()
|
|
}
|
|
|
|
@objc func togglePageTurnDropdown() {
|
|
pageTurnDropdownView.isHidden.toggle()
|
|
}
|
|
|
|
@objc func toggleBackgroundColorDropdown() {
|
|
backgroundColorDropdownView.isHidden.toggle()
|
|
}
|
|
|
|
func gestureRecognizer(
|
|
_: UIGestureRecognizer,
|
|
shouldRecognizeSimultaneouslyWith _: UIGestureRecognizer
|
|
) -> Bool {
|
|
return true
|
|
}
|
|
|
|
func toggleBar() {
|
|
topBarView.isHidden.toggle()
|
|
bottomBarView.isHidden.toggle()
|
|
|
|
if topBarView.isHidden {
|
|
pageTurnDropdownView.isHidden = true
|
|
backgroundColorDropdownView.isHidden = true
|
|
}
|
|
}
|
|
|
|
func scrollViewDidEndDecelerating(_: UIScrollView) {
|
|
if scrollingCollectionView.isHidden { return }
|
|
updateInfo()
|
|
saveLocalState()
|
|
}
|
|
|
|
func scrollViewDidEndDragging(_: UIScrollView, willDecelerate decelerate: Bool) {
|
|
if scrollingCollectionView.isHidden { return }
|
|
if !decelerate {
|
|
updateInfo()
|
|
}
|
|
saveLocalState()
|
|
}
|
|
|
|
func hideBar() {
|
|
topBarView.isHidden = true
|
|
bottomBarView.isHidden = true
|
|
pageTurnDropdownView.isHidden = true
|
|
backgroundColorDropdownView.isHidden = true
|
|
}
|
|
|
|
@objc func handleTopTap() {
|
|
toggleBar()
|
|
}
|
|
|
|
@objc func handleLeftTap() {
|
|
switch mode {
|
|
case .rightToLeft: changeImage(turn: .next)
|
|
case .leftToRight: changeImage(turn: .previous)
|
|
case .scroll: break
|
|
}
|
|
}
|
|
|
|
@objc func handleRightTap() {
|
|
switch mode {
|
|
case .rightToLeft: changeImage(turn: .previous)
|
|
case .leftToRight: changeImage(turn: .next)
|
|
case .scroll: break
|
|
}
|
|
}
|
|
|
|
@objc func handleSwipe(_ gesture: UISwipeGestureRecognizer) {
|
|
switch gesture.direction {
|
|
case .left:
|
|
switch mode {
|
|
case .rightToLeft: changeImage(turn: .previous)
|
|
case .leftToRight: changeImage(turn: .next)
|
|
case .scroll: break
|
|
}
|
|
case .right:
|
|
switch mode {
|
|
case .rightToLeft: changeImage(turn: .next)
|
|
case .leftToRight: changeImage(turn: .previous)
|
|
case .scroll: break
|
|
}
|
|
default: break
|
|
}
|
|
}
|
|
|
|
func setupImageView() {
|
|
imageView.translatesAutoresizingMaskIntoConstraints = false
|
|
// Scaling is done when the image is loaded to avoid scaling on main thread
|
|
imageView.contentMode = .center
|
|
imageView.clipsToBounds = true
|
|
|
|
readerView.addSubview(imageView)
|
|
|
|
NSLayoutConstraint.activate([
|
|
imageView.topAnchor.constraint(equalTo: readerView.topAnchor),
|
|
imageView.bottomAnchor.constraint(equalTo: readerView.bottomAnchor),
|
|
imageView.leadingAnchor.constraint(equalTo: readerView.leadingAnchor),
|
|
imageView.trailingAnchor.constraint(equalTo: readerView.trailingAnchor),
|
|
])
|
|
}
|
|
|
|
func changeImage(turn: PageTurn) {
|
|
let scaling = UIView.ContentMode.scaleAspectFit
|
|
var newProgress = progress
|
|
newProgress = getProgressIndicesFromTurn(turn: turn, progress: newProgress)
|
|
if newProgress.v == progress.v, newProgress.c == progress.c, newProgress.i == progress.i {
|
|
return
|
|
}
|
|
progress = newProgress
|
|
if let path = getImagePath(progress: progress) {
|
|
imageLoader.loadImage(at: path, scaling: scaling) { [weak self] image in
|
|
self?.imageView.image = image
|
|
self?.updateInfo()
|
|
}
|
|
} else {
|
|
return
|
|
}
|
|
|
|
for _ in 0 ... preloadCount {
|
|
newProgress = getProgressIndicesFromTurn(turn: .next, progress: newProgress)
|
|
if let path = getImagePath(progress: newProgress) {
|
|
imageLoader.preloadImage(at: path, scaling: scaling)
|
|
} else {
|
|
print("could not preload image")
|
|
}
|
|
}
|
|
|
|
saveLocalState()
|
|
}
|
|
|
|
func metaValueToString(m: MetaValue) -> String {
|
|
var r = ""
|
|
if let bonus = m.bonus {
|
|
r = String(m.main) + "." + String(bonus)
|
|
} else {
|
|
r = String(m.main)
|
|
}
|
|
return r
|
|
}
|
|
|
|
func updateInfo() {
|
|
if metadata == nil { return }
|
|
|
|
var text = "\(metadata.title)\n"
|
|
|
|
if let chapterTitle = metadata.volumes[progress.v].chapters[progress.c].name {
|
|
text +=
|
|
"\(chapterTitle)\n"
|
|
}
|
|
let chapterValue = metadata.volumes[progress.v].chapters[progress.c].chapter
|
|
let chapterString = metaValueToString(m: chapterValue)
|
|
|
|
let lastChapterValue = metadata.last_chapter
|
|
let lastChapterString = metaValueToString(m: lastChapterValue)
|
|
|
|
let volumeValue = metadata.volumes[progress.v].volume
|
|
let volumeString = metaValueToString(m: volumeValue)
|
|
|
|
let lastVolumeValue = metadata.last_volume
|
|
let lastVolumeString = metaValueToString(m: lastVolumeValue)
|
|
|
|
let lastChapterIndex = metadata.volumes[progress.v].chapters.count - 1
|
|
let lastImageIndex =
|
|
metadata.volumes[progress.v].chapters[lastChapterIndex].images.count - 1
|
|
|
|
let lastImage = metadata.volumes[progress.v].chapters[lastChapterIndex].images[
|
|
lastImageIndex
|
|
]
|
|
var lastPageString = ""
|
|
if lastImage.doublePage {
|
|
lastPageString = String(lastImage.firstPage + 1)
|
|
} else {
|
|
lastPageString = String(lastImage.firstPage)
|
|
}
|
|
|
|
let currentImage = metadata.volumes[progress.v].chapters[progress.c].images[progress.i]
|
|
var pageString = ""
|
|
if currentImage.doublePage {
|
|
pageString = String(currentImage.firstPage) + "-" + String(currentImage.firstPage + 1)
|
|
} else {
|
|
pageString = String(currentImage.firstPage)
|
|
}
|
|
|
|
text +=
|
|
"""
|
|
Volume \(volumeString) of \(lastVolumeString)
|
|
Chapter \(chapterString) of \(lastChapterString)
|
|
Page \(pageString) of \(lastPageString)
|
|
"""
|
|
if let size = imageLoader.size[getImagePath(progress: progress).path] {
|
|
text += "\nImage size: \(Int(size.width))x\(Int(size.height))"
|
|
}
|
|
info.text = text
|
|
}
|
|
|
|
func getImagePath(progress: ProgressIndices) -> URL! {
|
|
let (v, c, i) = (progress.v, progress.c, progress.i)
|
|
let modernPath = currentPath.appendingPathComponent("images").appendingPathComponent(
|
|
metadata.volumes[v].chapters[c].images[i].fileName)
|
|
// print("trying to get path \(modernPath)")
|
|
// if fileManager.fileExists(atPath: modernPath.path) {
|
|
return modernPath
|
|
// }
|
|
// return nil
|
|
}
|
|
|
|
func getProgressIndicesFromTurn(turn: PageTurn, progress: ProgressIndices) -> ProgressIndices {
|
|
let (v, c, i) = (progress.v, progress.c, progress.i)
|
|
switch turn {
|
|
case .next:
|
|
if metadata.volumes[v].chapters[c].images.count > i + 1 {
|
|
return ProgressIndices(v: v, c: c, i: i + 1)
|
|
}
|
|
if metadata.volumes[v].chapters.count > c + 1 {
|
|
return ProgressIndices(v: v, c: c + 1, i: 0)
|
|
}
|
|
if metadata.volumes.count > v + 1 {
|
|
return ProgressIndices(v: v + 1, c: 0, i: 0)
|
|
}
|
|
case .previous:
|
|
if i > 0 {
|
|
return ProgressIndices(v: v, c: c, i: i - 1)
|
|
}
|
|
if c > 0 {
|
|
return ProgressIndices(
|
|
v: v, c: c - 1, i: metadata.volumes[v].chapters[c - 1].images.count - 1
|
|
)
|
|
}
|
|
if v > 0 {
|
|
return ProgressIndices(
|
|
v: v - 1, c: metadata.volumes[v - 1].chapters.count - 1,
|
|
i: metadata.volumes[v - 1].chapters[
|
|
metadata.volumes[v - 1].chapters.count - 1
|
|
].images.count - 1
|
|
)
|
|
}
|
|
}
|
|
return ProgressIndices(v: v, c: c, i: i)
|
|
}
|
|
|
|
func getMetadata(path: URL) -> Metadata? {
|
|
do {
|
|
let json = try Data(
|
|
String(contentsOfFile: path.appendingPathComponent("metadata.json").path)
|
|
.utf8)
|
|
let metadata = try JSONDecoder().decode(Metadata.self, from: json)
|
|
return metadata
|
|
|
|
} catch let decodingError as DecodingError {
|
|
print(decodingError.errorDescription!)
|
|
} catch {
|
|
print("Unexpected error: \(error)")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func setImages(path _: URL) {
|
|
let scaling: UIView.ContentMode!
|
|
if mode == .scroll {
|
|
scaling = UIView.ContentMode.scaleAspectFill
|
|
} else { scaling = UIView.ContentMode.scaleAspectFit }
|
|
imageLoader.loadImage(
|
|
at:
|
|
getImagePath(progress: progress),
|
|
scaling: scaling
|
|
) { [weak self] image in
|
|
self?.imageView.image = image
|
|
self?.updateInfo()
|
|
}
|
|
|
|
var newProgress = progress
|
|
for _ in 0 ... preloadCount {
|
|
newProgress = getProgressIndicesFromTurn(turn: .next, progress: newProgress)
|
|
imageLoader.preloadImage(at: getImagePath(progress: newProgress), scaling: scaling)
|
|
}
|
|
}
|
|
|
|
func getPathFromComicName(name: String) -> URL? {
|
|
for comic in comics {
|
|
if comic.metadata.title == name {
|
|
return comic.path
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
override func viewWillTransition(
|
|
to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator
|
|
) {
|
|
super.viewWillTransition(to: size, with: coordinator)
|
|
if mode != .scroll {
|
|
imageLoader.loadImage(
|
|
at: getImagePath(progress: progress),
|
|
scaling: .scaleAspectFit
|
|
) { image in
|
|
self.imageView.image = image
|
|
}
|
|
} else {
|
|
scrollingCollectionView.reloadData()
|
|
changedOrientation = true
|
|
}
|
|
}
|
|
}
|
|
|
|
func getGlobalState() -> GlobalState {
|
|
let fileManager = FileManager.default
|
|
if let documentsURL = fileManager.urls(for: .documentDirectory, in: .userDomainMask).first {
|
|
do {
|
|
let json = try Data(
|
|
String(
|
|
contentsOfFile: documentsURL.appendingPathComponent("state.json").path
|
|
).utf8)
|
|
return try JSONDecoder().decode(GlobalState.self, from: json)
|
|
} catch {
|
|
print("Error reading directory contents: \(error)")
|
|
}
|
|
}
|
|
return GlobalState(comicName: nil)
|
|
}
|
|
|
|
func getDocumentsURL() -> URL? {
|
|
if let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
|
|
.first
|
|
{
|
|
return documentsURL
|
|
}
|
|
print("failed to get documents dir")
|
|
return nil
|
|
}
|
|
|
|
extension ViewController: UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
|
|
func collectionView(
|
|
_ collectionView: UICollectionView, numberOfItemsInSection _: Int
|
|
)
|
|
-> Int
|
|
{
|
|
if collectionView == comicCollectionView {
|
|
return comics.count
|
|
} else {
|
|
return pagesAvailable
|
|
}
|
|
}
|
|
|
|
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath)
|
|
-> UICollectionViewCell
|
|
{
|
|
if collectionView == comicCollectionView {
|
|
let cell =
|
|
collectionView.dequeueReusableCell(
|
|
withReuseIdentifier: "ComicImageCell", for: indexPath
|
|
)
|
|
as! ComicImageCell
|
|
cell.imageView.image = comics[indexPath.item].cover
|
|
return cell
|
|
} else if collectionView == scrollingCollectionView {
|
|
// let scaling = UIView.ContentMode.scaleAspectFill
|
|
let cell =
|
|
collectionView.dequeueReusableCell(
|
|
withReuseIdentifier: "ScrollingImageCell", for: indexPath
|
|
)
|
|
as! ScrollingImageCell
|
|
if metadata == nil {
|
|
return cell
|
|
}
|
|
// TODO: Fix scrolling again
|
|
return cell
|
|
} else {
|
|
assertionFailure()
|
|
}
|
|
|
|
// Xcode profiling sucks:
|
|
return
|
|
collectionView.dequeueReusableCell(
|
|
withReuseIdentifier: "ScrollingImageCell", for: indexPath
|
|
)
|
|
as! ScrollingImageCell
|
|
}
|
|
|
|
func collectionView(
|
|
_ collectionView: UICollectionView,
|
|
layout _: UICollectionViewLayout,
|
|
sizeForItemAt _: IndexPath
|
|
) -> CGSize {
|
|
if collectionView == comicCollectionView {
|
|
let spacing: CGFloat = 8
|
|
let itemsPerRow: CGFloat = 3
|
|
let totalSpacing = (itemsPerRow - 1) * spacing
|
|
let width = (collectionView.bounds.width - totalSpacing) / itemsPerRow
|
|
return CGSize(width: width, height: width)
|
|
} else if collectionView == scrollingCollectionView {
|
|
if metadata == nil {
|
|
return CGSize()
|
|
}
|
|
// TODO: Fix scrolling again
|
|
return CGSize()
|
|
} else {
|
|
assertionFailure()
|
|
}
|
|
// Xcode profiling sucks:
|
|
return CGSize()
|
|
}
|
|
|
|
func collectionView(
|
|
_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath
|
|
) {
|
|
if collectionView == comicCollectionView {
|
|
let selectedComic = comics[indexPath.item]
|
|
|
|
readComic(name: selectedComic.metadata.title)
|
|
}
|
|
}
|
|
}
|
|
|
|
class ScrollingImageCell: UICollectionViewCell {
|
|
let imageView = UIImageView()
|
|
|
|
override init(frame: CGRect) {
|
|
super.init(frame: frame)
|
|
// Scaling is done when the image is loaded to avoid scaling on main thread
|
|
imageView.contentMode = .center
|
|
imageView.clipsToBounds = true
|
|
imageView.translatesAutoresizingMaskIntoConstraints = false
|
|
contentView.addSubview(imageView)
|
|
|
|
NSLayoutConstraint.activate([
|
|
imageView.topAnchor.constraint(equalTo: contentView.topAnchor),
|
|
imageView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),
|
|
imageView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
|
|
imageView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor),
|
|
])
|
|
}
|
|
|
|
@available(*, unavailable)
|
|
required init?(coder _: NSCoder) {
|
|
fatalError("init(coder:) has not been implemented")
|
|
}
|
|
}
|
|
|
|
class ComicImageCell: UICollectionViewCell {
|
|
let imageView = UIImageView()
|
|
|
|
override init(frame: CGRect) {
|
|
super.init(frame: frame)
|
|
imageView.contentMode = .scaleAspectFit
|
|
imageView.clipsToBounds = true
|
|
imageView.translatesAutoresizingMaskIntoConstraints = false
|
|
contentView.addSubview(imageView)
|
|
|
|
NSLayoutConstraint.activate([
|
|
imageView.topAnchor.constraint(equalTo: contentView.topAnchor),
|
|
imageView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),
|
|
imageView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
|
|
imageView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor),
|
|
])
|
|
}
|
|
|
|
@available(*, unavailable)
|
|
required init?(coder _: NSCoder) {
|
|
fatalError("init(coder:) has not been implemented")
|
|
}
|
|
}
|
|
|
|
enum Rotation {
|
|
case vertical
|
|
case horizontal
|
|
}
|
|
|
|
class ImageLoader {
|
|
private let cache = NSCache<NSString, UIImage>()
|
|
private let horCache = NSCache<NSString, UIImage>()
|
|
private var loadingTasks: [String: [(UIImage?) -> Void]] = [:]
|
|
var size: [String: CGSize] = [:]
|
|
|
|
init() {
|
|
// 128 MiB
|
|
cache.totalCostLimit = 128 * 1024 * 1024
|
|
}
|
|
|
|
func preloadImage(at path: URL, scaling: UIView.ContentMode) {
|
|
loadImage(at: path, scaling: scaling, completion: nil)
|
|
}
|
|
|
|
func loadImage(
|
|
at path: URL, scaling: UIView.ContentMode,
|
|
completion: ((UIImage?) -> Void)?
|
|
) {
|
|
let screenSize = UIScreen.main.bounds.size
|
|
let rotation: Rotation!
|
|
if screenSize.width > screenSize.height {
|
|
rotation = Rotation.horizontal
|
|
} else { rotation = Rotation.vertical }
|
|
|
|
if rotation == .vertical {
|
|
if let cached = cache.object(forKey: path.path as NSString) {
|
|
completion?(cached)
|
|
return
|
|
}
|
|
} else {
|
|
if let cached = horCache.object(forKey: path.path as NSString) {
|
|
completion?(cached)
|
|
return
|
|
}
|
|
}
|
|
|
|
if loadingTasks[path.path] != nil {
|
|
if let completion = completion {
|
|
loadingTasks[path.path]?.append(completion)
|
|
}
|
|
return
|
|
}
|
|
|
|
loadingTasks[path.path] = completion != nil ? [completion!] : []
|
|
|
|
queue.async { [weak self] in
|
|
guard let self = self else { return }
|
|
guard var image = UIImage(contentsOfFile: path.path) else { return }
|
|
self.size[path.path] = image.size
|
|
|
|
// If you turn pages fast, completion will not be nil and as such only the needed scaled image should be prepared
|
|
if completion == nil || rotation == .vertical {
|
|
let vertical = CGSize(
|
|
width: min(screenSize.width, screenSize.height),
|
|
height: max(screenSize.height, screenSize.width)
|
|
)
|
|
let vScaledSize = aspectSize(
|
|
for: image.size, in: vertical, scaling: scaling
|
|
)
|
|
let vScaleImage = resizeImage(image, to: vScaledSize)
|
|
guard let cost = imageByteSize(vScaleImage) else { return }
|
|
self.cache.setObject(vScaleImage, forKey: path.path as NSString, cost: cost)
|
|
if rotation == .vertical {
|
|
image = vScaleImage
|
|
}
|
|
}
|
|
|
|
if completion == nil || rotation == .horizontal {
|
|
let horizontal = CGSize(
|
|
width: max(screenSize.width, screenSize.height),
|
|
height: min(screenSize.height, screenSize.width)
|
|
)
|
|
let hScaledSize = aspectSize(
|
|
for: image.size, in: horizontal, scaling: scaling
|
|
)
|
|
let hScaleImage = resizeImage(image, to: hScaledSize)
|
|
guard let cost = imageByteSize(hScaleImage) else { return }
|
|
self.horCache.setObject(hScaleImage, forKey: path.path as NSString, cost: cost)
|
|
if rotation == .horizontal {
|
|
image = hScaleImage
|
|
}
|
|
}
|
|
|
|
DispatchQueue.main.async {
|
|
self.loadingTasks[path.path]?.forEach { $0(image) }
|
|
self.loadingTasks.removeValue(forKey: path.path)
|
|
}
|
|
}
|
|
}
|
|
|
|
func imageIfLoaded(at path: String) -> UIImage? {
|
|
return cache.object(forKey: path as NSString)
|
|
}
|
|
}
|
|
|
|
func imageByteSize(_ image: UIImage) -> Int? {
|
|
guard let cgImage = image.cgImage else { return nil }
|
|
return cgImage.bytesPerRow * cgImage.height
|
|
}
|
|
|
|
func resizeImage(_ image: UIImage, to size: CGSize) -> UIImage {
|
|
UIGraphicsBeginImageContextWithOptions(size, true, 0.0)
|
|
image.draw(in: CGRect(origin: .zero, size: size))
|
|
let scaledImage = UIGraphicsGetImageFromCurrentImageContext()
|
|
UIGraphicsEndImageContext()
|
|
return scaledImage!
|
|
}
|
|
|
|
func aspectSize(for imageSize: CGSize, in boundingSize: CGSize, scaling: UIView.ContentMode)
|
|
-> CGSize
|
|
{
|
|
let widthRatio = boundingSize.width / imageSize.width
|
|
let heightRatio = boundingSize.height / imageSize.height
|
|
var scale = CGFloat()
|
|
switch scaling {
|
|
case .scaleAspectFit: scale = min(widthRatio, heightRatio)
|
|
case .scaleAspectFill: scale = max(widthRatio, heightRatio)
|
|
default: scale = 1
|
|
}
|
|
|
|
return CGSize(
|
|
width: imageSize.width * scale,
|
|
height: imageSize.height * scale
|
|
)
|
|
}
|