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26 lines
885 B
26 lines
885 B
import AppKit
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import Quartz
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/// Drives the native Quick Look panel for one URL at a time. Single-click a row
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/// (or hit Space) to preview; the panel floats and closes itself like Finder.
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final class QuickLook: NSObject, QLPreviewPanelDataSource, QLPreviewPanelDelegate {
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static let shared = QuickLook()
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private var url: URL?
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func preview(_ url: URL) {
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self.url = url
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guard let panel = QLPreviewPanel.shared() else { return }
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if panel.isVisible {
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panel.reloadData()
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} else {
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panel.dataSource = self
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panel.delegate = self
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panel.makeKeyAndOrderFront(nil)
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}
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}
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func numberOfPreviewItems(in panel: QLPreviewPanel) -> Int { url == nil ? 0 : 1 }
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func previewPanel(_ panel: QLPreviewPanel, previewItemAt index: Int) -> QLPreviewItem {
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(url as NSURL?) ?? NSURL()
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}
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}
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