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//
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// MediaPreviewTransitionItem.swift
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// Mastodon
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//
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// Created by MainasuK Cirno on 2021-4-28.
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//
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import UIKit
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import CoreData
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class MediaPreviewTransitionItem: Identifiable {
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let id: UUID
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let source: Source
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var previewableViewController: MediaPreviewableViewController
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// source
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// value maybe invalid when preview paging
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var image: UIImage?
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var aspectRatio: CGSize?
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var initialFrame: CGRect? = nil
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var sourceImageView: UIImageView?
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var sourceImageViewCornerRadius: CGFloat?
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// target
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var targetFrame: CGRect? = nil
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// transitioning
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var imageView: UIImageView?
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var snapshotRaw: UIView?
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var snapshotTransitioning: UIView?
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var touchOffset: CGVector = CGVector.zero
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init(id: UUID = UUID(), source: Source, previewableViewController: MediaPreviewableViewController) {
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self.id = id
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self.source = source
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self.previewableViewController = previewableViewController
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}
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}
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extension MediaPreviewTransitionItem {
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enum Source {
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case mosaic(MosaicImageViewContainer)
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case profileAvatar(ProfileHeaderView)
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func updateAppearance(position: UIViewAnimatingPosition, index: Int?) {
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let alpha: CGFloat = position == .end ? 1 : 0
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switch self {
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case .mosaic(let mosaicImageViewContainer):
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if let index = index {
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mosaicImageViewContainer.setImageView(alpha: 0, index: index)
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} else {
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mosaicImageViewContainer.setImageViews(alpha: alpha)
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}
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case .profileAvatar(let profileHeaderView):
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profileHeaderView.avatarImageView.alpha = alpha
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}
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}
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}
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}
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