93 lines
3.0 KiB
Swift
93 lines
3.0 KiB
Swift
// GalleryViewController.swift
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// Tusker
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//
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// Created by Shadowfacts on 6/13/19.
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// Copyright © 2019 Shadowfacts. All rights reserved.
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//
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import UIKit
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import Pachyderm
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class GalleryViewController: UIPageViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {
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var dismissInteractionController: LargeImageInteractionController?
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let attachments: [Attachment]
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let sourcesInfo: [(CGRect, CGFloat)]
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let startIndex: Int
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let pages: [AttachmentViewController]
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var currentIndex: Int {
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guard let vc = viewControllers?.first as? AttachmentViewController,
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let index = pages.firstIndex(of: vc) else {
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fatalError()
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}
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return index
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}
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override var prefersStatusBarHidden: Bool {
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return true
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}
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override var childForHomeIndicatorAutoHidden: UIViewController? {
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return
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viewControllers?.first
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}
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init(attachments: [Attachment], sourcesInfo: [(CGRect, CGFloat)], startIndex: Int) {
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self.attachments = attachments
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self.sourcesInfo = sourcesInfo
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self.startIndex = startIndex
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self.pages = attachments.map(AttachmentViewController.init)
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super.init(transitionStyle: .scroll, navigationOrientation: .horizontal)
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setViewControllers([pages[startIndex]], direction: .forward, animated: false)
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modalPresentationStyle = .fullScreen
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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self.dataSource = self
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self.delegate = self
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dismissInteractionController = LargeImageInteractionController(viewController: self)
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}
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// MARK: - Page View Controller Data Source
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func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
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guard let attachment = viewController as? AttachmentViewController,
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let index = pages.firstIndex(of: attachment),
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index > 0 else {
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return nil
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}
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return pages[index - 1]
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}
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func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
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guard let attachment = viewController as? AttachmentViewController,
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let index = pages.firstIndex(of: attachment),
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index < pages.count - 1 else {
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return nil
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}
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return pages[index + 1]
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}
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// MARK: - Page View Controller Delegate
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func pageViewController(_ pageViewController: UIPageViewController, willTransitionTo pendingViewControllers: [UIViewController]) {
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let pending = pendingViewControllers.first as! AttachmentViewController
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let current = viewControllers!.first as! AttachmentViewController
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pending.controlsVisible = current.controlsVisible
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}
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}
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