import AppKit
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import CoreGraphics
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@MainActor
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public enum OverlayWindowPolicy {
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public static let styleMask: NSWindow.StyleMask = [
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.borderless,
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.fullSizeContentView,
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.nonactivatingPanel
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]
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public static let collectionBehavior: NSWindow.CollectionBehavior = [
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.canJoinAllSpaces,
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.fullScreenAuxiliary,
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.stationary,
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.transient,
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.ignoresCycle
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]
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public static let levelOffsetBelowMainMenu: CGWindowLevel = 1
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public static var quickSwitchLevel: NSWindow.Level {
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let mainMenuLevel = CGWindowLevelForKey(.mainMenuWindow)
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return NSWindow.Level(rawValue: Int(mainMenuLevel - levelOffsetBelowMainMenu))
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}
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public static var currentLevel: CGWindowLevel {
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CGWindowLevel(quickSwitchLevel.rawValue)
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}
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public static func apply(to panel: NSPanel, on screen: NSScreen?) {
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panel.styleMask = styleMask
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panel.collectionBehavior = collectionBehavior
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panel.level = quickSwitchLevel
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panel.hidesOnDeactivate = false
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panel.isReleasedWhenClosed = false
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panel.isOpaque = false
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panel.backgroundColor = .clear
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if let screen {
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panel.setFrame(screen.frame, display: false)
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}
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}
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public static func isBelowRescueSystemWindows(_ level: NSWindow.Level = quickSwitchLevel) -> Bool {
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level.rawValue < Int(CGWindowLevelForKey(.mainMenuWindow))
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}
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}
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