OpenTabsTransition.swift
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// Transition.swift
// browser
//
// Created by Artem Talko on 23.11.2023.
//
import UIKit
final class OpenTabsTransition: NSObject, UIViewControllerAnimatedTransitioning {
private var operation: UINavigationController.Operation
init(operation: UINavigationController.Operation) {
self.operation = operation
super.init()
}
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return 0.6
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
guard let toController = transitionContext.viewController(forKey: .to),
let fromController = transitionContext.viewController(forKey: .from) else {
transitionContext.completeTransition(true)
return
}
switch operation {
case .push :
pushController(fromController: fromController, toController: toController, transitionContext: transitionContext)
case .pop:
popController(fromController: fromController, toController: toController, transitionContext: transitionContext)
case .none:
transitionContext.completeTransition(true)
return
@unknown default:
break
}
}
}
//MARK: animation handlers
extension OpenTabsTransition {
private func pushController(fromController: UIViewController, toController: UIViewController, transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
guard let tabsController = fromController as? TabsViewController else {
transitionContext.completeTransition(true)
return
}
guard let browserHomeController = toController as? BrowserHomeViewController else {
transitionContext.completeTransition(true)
return
}
let cellIndexPathForTransition = tabsController.getCellIndex()
container.insertSubview(browserHomeController.mainView, at: 0)
DispatchQueue.main.asyncAfter(deadline: .now() + 0.001) {
let tabsCollectionView = tabsController.mainView.openedTabsCollectionView
tabsCollectionView.scrollToItem(at: cellIndexPathForTransition, at: .bottom, animated: false)
DispatchQueue.main.asyncAfter(deadline: .now() + 0.001) {
let cell = tabsController.mainView.openedTabsCollectionView.cellForItem(at: cellIndexPathForTransition)
let browserHomeImage = UIImageView()
browserHomeImage.image = SnapshotService.shared.makeSnapshot(browserHomeController.mainView)
guard let lastTab = cell as? OpenedTabsCollectionViewCell else {
return
}
lastTab.isHidden = true
container.addSubview(browserHomeImage)
browserHomeImage.frame = lastTab.frame
UIView.animate(withDuration: 0.2) {
browserHomeImage.frame = UIScreen.main.bounds
} completion: { _ in
browserHomeImage.removeFromSuperview()
lastTab.isHidden = false
transitionContext.completeTransition(true)
}
}
}
}
private func popController(fromController: UIViewController, toController: UIViewController, transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
guard let tabsController = toController as? TabsViewController else {
transitionContext.completeTransition(true)
return
}
guard let browserHomeController = fromController as? BrowserHomeViewController else {
transitionContext.completeTransition(true)
return
}
let cellIndexPathForTransition = tabsController.getCellIndex()
container.insertSubview(tabsController.mainView, at: 0)
DispatchQueue.main.asyncAfter(deadline: .now() + 0.001) {
let tabsCollectionView = tabsController.mainView.openedTabsCollectionView
tabsCollectionView.scrollToItem(at: cellIndexPathForTransition, at: .bottom, animated: false)
let lastItemIndex = tabsController.getCellIndex()
DispatchQueue.main.asyncAfter(deadline: .now() + 0.001) {
let cell = tabsController.mainView.openedTabsCollectionView.cellForItem(at: lastItemIndex)
let browserHomeImage = UIImageView()
browserHomeImage.image = SnapshotService.shared.makeSnapshot(browserHomeController.mainView)
guard let lastTab = cell as? OpenedTabsCollectionViewCell else {
return
}
lastTab.isHidden = true
container.addSubview(browserHomeImage)
browserHomeImage.frame = browserHomeController.mainView.frame
UIView.animate(withDuration: 0.2) {
fromController.view.isHidden = true
browserHomeImage.frame = lastTab.convertFrameToScreenCoordinates() ?? CGRect()
} completion: { _ in
browserHomeImage.removeFromSuperview()
lastTab.isHidden = false
transitionContext.completeTransition(true)
}
}
}
}
}