42 lines
1.3 KiB
Swift
42 lines
1.3 KiB
Swift
//
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// https://mczachurski.dev
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// Copyright © 2023 Marcin Czachurski and the repository contributors.
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// Licensed under the MIT License.
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//
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import Foundation
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import SwiftUI
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public class ImageSizeService {
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public static let shared = ImageSizeService()
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private init() { }
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private var memoryCacheData = MemoryCache<URL, CGSize>(entryLifetime: 3600)
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func get(for url: URL) -> CGSize? {
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return self.memoryCacheData[url]
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}
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func calculate(for url: URL, width: Int32, height: Int32) -> CGSize {
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return calculate(for: url, width: Double(width), height: Double(height))
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}
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func calculate(for url: URL, width: Int, height: Int) -> CGSize {
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return calculate(for: url, width: Double(width), height: Double(height))
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}
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func calculate(for url: URL, width: Double, height: Double) -> CGSize {
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let divider = Double(width) / UIScreen.main.bounds.size.width
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let calculatedHeight = Double(height) / divider
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let size = CGSize(
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width: UIScreen.main.bounds.width,
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height: (calculatedHeight > 0 && calculatedHeight < .infinity) ? calculatedHeight : UIScreen.main.bounds.width
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)
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self.memoryCacheData.insert(size, forKey: url)
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return size
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}
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}
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