98 lines
3.8 KiB
Swift
98 lines
3.8 KiB
Swift
/*
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Copyright 2019-2024 New Vector Ltd.
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SPDX-License-Identifier: AGPL-3.0-only
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Please see LICENSE in the repository root for full details.
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*/
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import UIKit
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/// `SlidingModalPresentationController` handles sliding transition presentation life cycle.
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final class SlidingModalPresentationController: UIPresentationController {
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// MARK: - Properties
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private var slidingModalContainerView: SlidingModalContainerView? {
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return self.containerView?.subviews.first(where: { (view) -> Bool in
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view is SlidingModalContainerView
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}) as? SlidingModalContainerView
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}
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// MARK: - Setup
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override init(presentedViewController: UIViewController, presenting presentingViewController: UIViewController?) {
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super.init(presentedViewController: presentedViewController, presenting: presentingViewController)
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}
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// MARK: - Life cycle
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override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
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super.viewWillTransition(to: size, with: coordinator)
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if let slidingModalPresentable = self.presentedViewController as? SlidingModalPresentable, let slidingModalContainerView = self.slidingModalContainerView {
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let slidingModalContainerViewContentViewWidth = slidingModalContainerView.contentViewWidthFittingSize(size)
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let presentableHeight = slidingModalPresentable.layoutHeightFittingWidth(slidingModalContainerViewContentViewWidth)
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slidingModalContainerView.updateContentViewMaxHeight(presentableHeight)
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}
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coordinator.animate(alongsideTransition: { (UIViewControllerTransitionCoordinatorContext) -> Void in
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self.slidingModalContainerView?.updateContentViewLayout()
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}, completion: { _ in
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})
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}
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override func presentationTransitionWillBegin() {
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guard let coordinator = presentedViewController.transitionCoordinator else {
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return
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}
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coordinator.animate(alongsideTransition: { [weak self] _ in
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// Update status bar appearance of presented view controller (if presenting view controller allowed it, see `modalPresentationCapturesStatusBarAppearance` property)
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self?.presentedViewController.setNeedsStatusBarAppearanceUpdate()
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}, completion: nil)
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}
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override func presentationTransitionDidEnd(_ completed: Bool) {
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self.slidingModalContainerView?.delegate = self
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}
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override func dismissalTransitionWillBegin() {
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guard let coordinator = presentedViewController.transitionCoordinator else {
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return
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}
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coordinator.animate(alongsideTransition: { [weak self] _ -> Void in
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// Update status bar appearance of presenting view controller
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self?.presentingViewController.setNeedsStatusBarAppearanceUpdate()
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}, completion: nil)
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}
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override func dismissalTransitionDidEnd(_ completed: Bool) {
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if completed {
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self.slidingModalContainerView?.removeFromSuperview()
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}
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}
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}
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// MARK: - SlidingModalContainerViewDelegate
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extension SlidingModalPresentationController: SlidingModalContainerViewDelegate {
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func slidingModalContainerViewDidTapBackground(_ view: SlidingModalContainerView) {
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let isDismissOnBackgroundTapAllowed: Bool
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if let slidingModalPresentable = self.presentedViewController as? SlidingModalPresentable {
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isDismissOnBackgroundTapAllowed = slidingModalPresentable.allowsDismissOnBackgroundTap()
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} else {
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isDismissOnBackgroundTapAllowed = true
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}
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if isDismissOnBackgroundTapAllowed {
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self.presentedViewController.dismiss(animated: true, completion: nil)
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}
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}
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}
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