mirror of
https://github.com/metabolist/metatext.git
synced 2024-06-01 07:08:07 +00:00
29 lines
1 KiB
Swift
29 lines
1 KiB
Swift
// Copyright © 2021 Metabolist. All rights reserved.
|
|
|
|
import Mastodon
|
|
import UIKit
|
|
|
|
extension UIView {
|
|
private static let defaultContentsRectSize = CGSize(width: 1, height: 1)
|
|
|
|
func setContentsRect(focus: Attachment.Meta.Focus, mediaSize: CGSize) {
|
|
let aspectRatio = mediaSize.width / mediaSize.height
|
|
let viewAspectRatio = bounds.width / bounds.height
|
|
var origin = CGPoint.zero
|
|
|
|
if viewAspectRatio > aspectRatio {
|
|
let mediaProportionalHeight = mediaSize.height * bounds.width / mediaSize.width
|
|
let maxPan = (mediaProportionalHeight - bounds.height) / (2 * mediaProportionalHeight)
|
|
|
|
origin.y = CGFloat(-focus.y) * maxPan
|
|
} else {
|
|
let mediaProportionalWidth = mediaSize.width * bounds.height / mediaSize.height
|
|
let maxPan = (mediaProportionalWidth - bounds.width) / (2 * mediaProportionalWidth)
|
|
|
|
origin.x = CGFloat(focus.x) * maxPan
|
|
}
|
|
|
|
layer.contentsRect = CGRect(origin: origin, size: Self.defaultContentsRectSize)
|
|
}
|
|
}
|