36 lines
1.1 KiB
Swift
36 lines
1.1 KiB
Swift
import SwiftUI
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/// QuickLook のサムネイルを非同期で読み込んで表示する。
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struct ThumbnailView: View {
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let url: URL
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let size: CGFloat
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@State private var image: NSImage?
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/// 読み込み済みならキャッシュから直接描く。プレースホルダの一瞬のちらつきを防ぐ。
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private var displayImage: NSImage? {
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image ?? ThumbnailLoader.shared.cached(for: url, size: size)
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}
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var body: some View {
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ZStack {
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RoundedRectangle(cornerRadius: 6, style: .continuous)
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.fill(.quaternary)
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if let image = displayImage {
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Image(nsImage: image)
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.resizable()
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.aspectRatio(contentMode: .fit)
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} else {
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ProgressView()
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.controlSize(.small)
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}
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}
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.frame(width: size, height: size)
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.clipShape(RoundedRectangle(cornerRadius: 6, style: .continuous))
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.task(id: url) {
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image = await ThumbnailLoader.shared.thumbnail(for: url, size: size)
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}
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}
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}
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