Extract overlay window controller

Ariver

2026-05-29 65b66f723294dd02174d30a67a05b88139f274ee

Extract overlay window controller

 Apptag/ApptagApp.swift

@@ -28,15 +28,6 @@

// MARK: - App Delegate (menubar + overlay window + hotkey)

final class OverlayPanel: NSPanel {
    override var canBecomeKey: Bool { true }
    override var canBecomeMain: Bool { true }

    override func constrainFrameRect(_ frameRect: NSRect, to screen: NSScreen?) -> NSRect {
        frameRect
    }
}

final class AppDelegate: NSObject, NSApplicationDelegate, NSMenuDelegate {
    private static let showDockIconKey = "showDockIcon"
    private static let statusItemAutosaveName = AppIdentity.statusItemAutosaveName
@@ -52,7 +43,6 @@
    private static let overlayTextInputLevel = launcherOverlayLevel

    private var statusItem: NSStatusItem?
    private var overlayWindow: NSWindow?
    private var overlayKeyMonitor: Any?
    private var quickSearchLocalMouseMonitor: Any?
    private var quickSearchExternalMouseMonitor: Any?
@@ -67,18 +57,82 @@
    private var isConfiguringApplicationMenu = false
    private var lastShowDockIcon: Bool?
    private var statusMenuScreenForNextOverlay: NSScreen?
    private var overlayGeneration = 0
    private var overlayAvoidsSpaceSwitch = false
    private var suppressReopenUntil = Date.distantPast

    private struct OverlayPlacementContext {
        let screen: NSScreen
        let frame: NSRect
    private lazy var overlayController = OverlayWindowController(
        dependencies: OverlayWindowController.Dependencies(
            shouldStageAsAccessory: { [weak self] in
                self?.shouldStageOverlayAsAccessory ?? false
            },
            isSettingsVisible: { [weak self] in
                self?.isSettingsVisible ?? false
            },
            settingsWindow: { [weak self] in
                self?.settingsWindow
            },
            canHideOverlay: { [weak self] in
                self?.isInEditMode == false
            },
            currentOverlayLevel: { [weak self] in
                self?.currentOverlayLevel ?? Self.overlayDefaultLevel
            },
            overlayLevel: { [weak self] initialQuickSearchSource in
                self?.overlayLevel(initialQuickSearchSource: initialQuickSearchSource) ?? Self.overlayDefaultLevel
            },
            makeContentView: { [weak self] initialQuickSearchSource in
                DismissibleHostingView(
                    rootView: ContentView(
                        hideOverlay: { [weak self] in
                            self?.hideOverlay(force: true)
                        },
                        initialQuickSearchSource: initialQuickSearchSource
                    ),
                    onBackdropTap: { [weak self] in
                        self?.hideOverlay()
                    }
                )
            },
            installOverlayKeyMonitor: { [weak self] in
                self?.installOverlayKeyMonitor()
            },
            removeOverlayKeyMonitor: { [weak self] in
                self?.removeOverlayKeyMonitor()
            },
            removeQuickSearchMouseMonitor: { [weak self] in
                self?.removeQuickSearchExternalMouseMonitor()
            },
            detachSettingsWindow: { [weak self] window in
                self?.detachSettingsWindow(window)
            },
            prepareSettingsWindow: { [weak self] window in
                self?.prepareSettingsWindow(window)
            },
            refreshChromeState: { [weak self] activate, avoidSpaceSwitch in
                self?.refreshLauncherChromeState(activate: activate, avoidSpaceSwitch: avoidSpaceSwitch)
            },
            onWillHide: {
                TagDatabase.flushPendingCategorySchemeBackupBatch()
            },
            onDidHide: {
                NotificationCenter.default.post(name: .tagLauncherOverlayDidHide, object: nil)
            },
            onDidShow: {
                NotificationCenter.default.post(name: .tagLauncherOverlayDidShow, object: nil)
            }
        )
    )

    private var overlayWindow: NSWindow? {
        overlayController.window
    }

    private struct ForeignWindowFrame {
        let owner: String
        let frame: NSRect
    private var overlayGeneration: Int {
        overlayController.generation
    }

    private var overlayAvoidsSpaceSwitch: Bool {
        get { overlayController.avoidsSpaceSwitch }
        set { overlayController.avoidsSpaceSwitch = newValue }
    }

    private var isOverlayVisible: Bool {
@@ -487,7 +541,7 @@
    }

    func menuWillOpen(_ menu: NSMenu) {
        statusMenuScreenForNextOverlay = screenContainingCurrentPointer()
        statusMenuScreenForNextOverlay = overlayController.screenContainingCurrentPointer()
            ?? statusItem?.button?.window?.screen
            ?? NSScreen.main
            ?? NSScreen.screens.first
@@ -774,37 +828,11 @@
    }

    private func performToggleOverlay(preferredScreen: NSScreen?) {
        if overlayWindow?.isVisible == true {
            hideOverlay(force: true)
        } else {
            showOverlay(preferredScreen: preferredScreen)
        }
        overlayController.toggle(preferredScreen: preferredScreen)
    }

    private func showOrFocusOverlay(preferredScreen: NSScreen? = nil) {
        let placement = overlayPlacementContextForNextOverlay(preferredScreen: preferredScreen)
        let shouldAvoidSpaceSwitch = placement.map { hasFullscreenWindowOnScreen($0.screen) } ?? false
        if let overlayWindow, overlayWindow.isVisible {
            overlayAvoidsSpaceSwitch = shouldAvoidSpaceSwitch
            moveOverlayToCurrentPlacement(preferredScreen: preferredScreen)
            overlayWindow.level = currentOverlayLevel
            refreshLauncherChromeState(activate: !shouldAvoidSpaceSwitch, avoidSpaceSwitch: shouldAvoidSpaceSwitch)
            overlayWindow.makeKeyAndOrderFront(nil)
            overlayWindow.orderFrontRegardless()
            if let settingsWindow, settingsWindow.isVisible {
                prepareSettingsWindow(settingsWindow)
            }
            return
        }
        showOverlay(preferredScreen: preferredScreen)
    }

    private func moveOverlayToCurrentPlacement(preferredScreen: NSScreen?) {
        guard let overlayWindow,
              let placement = overlayPlacementContextForNextOverlay(preferredScreen: preferredScreen),
              overlayWindow.frame != placement.frame
        else { return }
        overlayWindow.setFrame(placement.frame, display: true)
        overlayController.showOrFocus(preferredScreen: preferredScreen)
    }

    private func showOverlay(
@@ -812,174 +840,11 @@
        preferredScreen: NSScreen? = nil,
        stagedForAllSpaces: Bool = false
    ) {
        guard let placement = overlayPlacementContextForNextOverlay(preferredScreen: preferredScreen) else { return }

        let shouldAvoidSpaceSwitch = hasFullscreenWindowOnScreen(placement.screen)
        let shouldStageAsAccessory = shouldStageOverlayAsAccessory || shouldAvoidSpaceSwitch

        if !stagedForAllSpaces && shouldStageAsAccessory {
            // Let the all-spaces panel attach to the pointer's display before the app reclaims focus.
            if NSApp.activationPolicy() != .accessory {
                NSApp.setActivationPolicy(.accessory)
            }
            if NSApp.isActive {
                NSApp.deactivate()
            }
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.08) { [weak self] in
                self?.showOverlay(
                    initialQuickSearchSource: initialQuickSearchSource,
                    preferredScreen: placement.screen,
                    stagedForAllSpaces: true
                )
            }
            return
        }

        if overlayWindow?.isVisible == true {
            hideOverlay(force: true)
        } else if let existingWindow = overlayWindow {
            existingWindow.orderOut(nil)
            overlayWindow = nil
        }
        overlayAvoidsSpaceSwitch = shouldAvoidSpaceSwitch

        let window = makeOverlayWindow(
            on: placement.screen,
            initialQuickSearchSource: initialQuickSearchSource
        overlayController.show(
            initialQuickSearchSource: initialQuickSearchSource,
            preferredScreen: preferredScreen,
            stagedForAllSpaces: stagedForAllSpaces
        )
        overlayGeneration &+= 1
        overlayWindow = window
        installOverlayKeyMonitor()
        if shouldStageAsAccessory {
            if NSApp.isActive {
                NSApp.deactivate()
            }
            if NSApp.activationPolicy() != .accessory {
                NSApp.setActivationPolicy(.accessory)
            }
        }

        let targetLevel = overlayLevel(initialQuickSearchSource: initialQuickSearchSource)
        window.setFrame(placement.frame, display: true)
        window.level = targetLevel

        window.makeKeyAndOrderFront(nil)
        window.orderFrontRegardless()

        let placementFrame = placement.frame
        let finishForegroundClaim: () -> Void = { [weak self, weak window] in
            guard let self, let window, self.overlayWindow === window else { return }
            self.refreshLauncherChromeState(activate: !shouldAvoidSpaceSwitch, avoidSpaceSwitch: shouldAvoidSpaceSwitch)
            if window.frame != placementFrame {
                window.setFrame(placementFrame, display: true)
                window.makeKeyAndOrderFront(nil)
                window.orderFrontRegardless()
            }
            if let settingsWindow = self.settingsWindow, settingsWindow.isVisible {
                self.prepareSettingsWindow(settingsWindow)
            }
            NotificationCenter.default.post(name: .tagLauncherOverlayDidShow, object: nil)
        }

        if !isSettingsVisible {
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.12, execute: finishForegroundClaim)
        } else {
            finishForegroundClaim()
        }
    }

    private func hasFullscreenWindowOnScreen(_ screen: NSScreen) -> Bool {
        let screenFrame = screen.frame
        let windowFrames = foreignLayerZeroWindows(on: screenFrame)

        if windowFrames.contains(where: { isSingleFullscreenWindow($0.frame, on: screenFrame) }) {
            return true
        }

        return hasSplitViewFullscreenWindows(windowFrames, on: screenFrame)
    }

    private func foreignLayerZeroWindows(on screenFrame: NSRect) -> [ForeignWindowFrame] {
        let windows = CGWindowListCopyWindowInfo([.optionOnScreenOnly, .excludeDesktopElements], kCGNullWindowID) as? [[String: Any]] ?? []
        return windows.compactMap { info in
            guard let owner = info[kCGWindowOwnerName as String] as? String,
                  owner != AppIdentity.displayName,
                  owner != "Window Server",
                  owner != "Dock",
                  owner != "loginwindow",
                  let layer = info[kCGWindowLayer as String] as? Int,
                  layer == 0,
                  let bounds = info[kCGWindowBounds as String] as? NSDictionary
            else { return nil }

            let frame = NSRect(
                x: cgWindowDimension(bounds, "X"),
                y: cgWindowDimension(bounds, "Y"),
                width: cgWindowDimension(bounds, "Width"),
                height: cgWindowDimension(bounds, "Height")
            )
            guard frame.intersects(screenFrame) else { return nil }
            return ForeignWindowFrame(owner: owner, frame: frame)
        }
    }

    private func isSingleFullscreenWindow(_ windowFrame: NSRect, on screenFrame: NSRect) -> Bool {
        let widthMatches = abs(windowFrame.width - screenFrame.width) <= 12
        let heightMatches = windowFrame.height >= screenFrame.height * 0.88
        let horizontallyAligned = abs(windowFrame.midX - screenFrame.midX) <= 12
        let verticallyAligned = abs(windowFrame.maxY - screenFrame.maxY) <= 32
        return widthMatches && heightMatches && horizontallyAligned && verticallyAligned
    }

    private func hasSplitViewFullscreenWindows(_ windows: [ForeignWindowFrame], on screenFrame: NSRect) -> Bool {
        let clippedWindows = windows.map {
            ForeignWindowFrame(owner: $0.owner, frame: $0.frame.intersection(screenFrame))
        }
        let tallWindows = clippedWindows
            .filter { window in
                let frame = window.frame
                return frame.height >= screenFrame.height * 0.86
                    && frame.width >= screenFrame.width * 0.20
                    && frame.width <= screenFrame.width * 0.86
                    && abs(frame.maxY - screenFrame.maxY) <= 32
            }
            .sorted { $0.frame.minX < $1.frame.minX }

        guard tallWindows.count >= 2 else { return false }

        for startIndex in tallWindows.indices {
            var union = tallWindows[startIndex].frame
            var lastMaxX = union.maxX

            for window in tallWindows.dropFirst(startIndex + 1) {
                let gap = window.frame.minX - lastMaxX
                if gap < -32 || gap > 48 {
                    break
                }
                union = union.union(window.frame)
                lastMaxX = max(lastMaxX, window.frame.maxX)

                let touchesLeft = abs(union.minX - screenFrame.minX) <= 32
                let touchesRight = abs(union.maxX - screenFrame.maxX) <= 32
                let coversWidth = union.width >= screenFrame.width * 0.92
                let coversHeight = union.height >= screenFrame.height * 0.86
                if touchesLeft && touchesRight && coversWidth && coversHeight {
                    return true
                }
            }
        }

        return false
    }

    private func cgWindowDimension(_ bounds: NSDictionary, _ key: String) -> CGFloat {
        if let value = bounds[key] as? CGFloat {
            return value
        }
        if let value = bounds[key] as? NSNumber {
            return CGFloat(truncating: value)
        }
        return 0
    }

    private func installOverlayKeyMonitor() {
@@ -1050,60 +915,8 @@
        }
    }

    private func makeOverlayWindow(on screen: NSScreen, initialQuickSearchSource: String? = nil) -> NSWindow {
        let panel = OverlayPanel(
            contentRect: screen.frame,
            styleMask: [.borderless, .fullSizeContentView, .nonactivatingPanel],
            backing: .buffered,
            defer: false
        )
        panel.isFloatingPanel = true
        panel.hidesOnDeactivate = false
        // Keep the overlay publishable above fullscreen Spaces without asking
        // AppKit to migrate an all-spaces window between Spaces.
        panel.collectionBehavior = [
            .canJoinAllSpaces,
            .fullScreenAuxiliary,
            .stationary,
            .transient,
            .ignoresCycle
        ]
        panel.isOpaque = false
        panel.backgroundColor = NSColor.black.withAlphaComponent(0.001)
        panel.hasShadow = false
        panel.titlebarAppearsTransparent = true
        panel.titleVisibility = .hidden
        panel.isReleasedWhenClosed = false
        panel.contentView = DismissibleHostingView(
            rootView: ContentView(
                hideOverlay: { [weak self] in
                    self?.hideOverlay(force: true)
                },
                initialQuickSearchSource: initialQuickSearchSource
            ),
            onBackdropTap: { [weak self] in
                self?.hideOverlay()
            }
        )
        return panel
    }

    private func hideOverlay(force: Bool = false, discardWindow: Bool = false) {
        guard force || !isInEditMode else { return }
        overlayGeneration &+= 1
        TagDatabase.flushPendingCategorySchemeBackupBatch()
        if let settingsWindow, settingsWindow.parent == overlayWindow {
            detachSettingsWindow(settingsWindow)
        }
        overlayWindow?.orderOut(nil)
        removeOverlayKeyMonitor()
        removeQuickSearchExternalMouseMonitor()
        overlayAvoidsSpaceSwitch = false
        refreshLauncherChromeState()
        NotificationCenter.default.post(name: .tagLauncherOverlayDidHide, object: nil)
        if discardWindow {
            overlayWindow = nil
        }
        overlayController.hide(force: force, discardWindow: discardWindow)
    }

    // MARK: - Global Hotkeys
@@ -1396,24 +1209,7 @@
    }

    private func screenUnderMouse() -> NSScreen? {
        overlayPlacementContextForNextOverlay(preferredScreen: nil)?.screen
    }

    private func overlayPlacementContextForNextOverlay(preferredScreen: NSScreen?) -> OverlayPlacementContext? {
        if let screen = preferredScreen {
            return OverlayPlacementContext(screen: screen, frame: screen.frame)
        }
        guard let screen = screenContainingCurrentPointer() ?? NSScreen.main ?? NSScreen.screens.first else {
            return nil
        }
        return OverlayPlacementContext(screen: screen, frame: screen.frame)
    }

    private func screenContainingCurrentPointer() -> NSScreen? {
        let mousePoint = NSEvent.mouseLocation
        return NSScreen.screens.first(where: {
            NSMouseInRect(mousePoint, $0.frame, false)
        })
        overlayController.screenUnderMouse()
    }

    /// Clean up settingsWindow reference when the Settings window closes.

 Apptag/OverlayWindowController.swift

New file
@@ -0,0 +1,330 @@
import AppKit
import SwiftUI

final class OverlayPanel: NSPanel {
    override var canBecomeKey: Bool { true }
    override var canBecomeMain: Bool { true }

    override func constrainFrameRect(_ frameRect: NSRect, to screen: NSScreen?) -> NSRect {
        frameRect
    }
}

final class OverlayWindowController {
    struct Dependencies {
        let shouldStageAsAccessory: () -> Bool
        let isSettingsVisible: () -> Bool
        let settingsWindow: () -> NSWindow?
        let canHideOverlay: () -> Bool
        let currentOverlayLevel: () -> NSWindow.Level
        let overlayLevel: (_ initialQuickSearchSource: String?) -> NSWindow.Level
        let makeContentView: (_ initialQuickSearchSource: String?) -> NSView
        let installOverlayKeyMonitor: () -> Void
        let removeOverlayKeyMonitor: () -> Void
        let removeQuickSearchMouseMonitor: () -> Void
        let detachSettingsWindow: (NSWindow) -> Void
        let prepareSettingsWindow: (NSWindow) -> Void
        let refreshChromeState: (_ activate: Bool, _ avoidSpaceSwitch: Bool) -> Void
        let onWillHide: () -> Void
        let onDidHide: () -> Void
        let onDidShow: () -> Void
    }

    private struct OverlayPlacementContext {
        let screen: NSScreen
        let frame: NSRect
    }

    private struct ForeignWindowFrame {
        let owner: String
        let frame: NSRect
    }

    private let dependencies: Dependencies

    private(set) var window: NSWindow?
    private(set) var generation = 0
    var avoidsSpaceSwitch = false

    var isVisible: Bool {
        window?.isVisible == true
    }

    init(dependencies: Dependencies) {
        self.dependencies = dependencies
    }

    func toggle(preferredScreen: NSScreen?) {
        if window?.isVisible == true {
            hide(force: true)
        } else {
            show(preferredScreen: preferredScreen)
        }
    }

    func showOrFocus(preferredScreen: NSScreen? = nil) {
        let placement = overlayPlacementContextForNextOverlay(preferredScreen: preferredScreen)
        let shouldAvoidSpaceSwitch = placement.map { hasFullscreenWindowOnScreen($0.screen) } ?? false
        if let window, window.isVisible {
            avoidsSpaceSwitch = shouldAvoidSpaceSwitch
            moveToCurrentPlacement(preferredScreen: preferredScreen)
            window.level = dependencies.currentOverlayLevel()
            dependencies.refreshChromeState(!shouldAvoidSpaceSwitch, shouldAvoidSpaceSwitch)
            orderFront(window)
            if let settingsWindow = dependencies.settingsWindow(), settingsWindow.isVisible {
                dependencies.prepareSettingsWindow(settingsWindow)
            }
            return
        }
        show(preferredScreen: preferredScreen)
    }

    func show(
        initialQuickSearchSource: String? = nil,
        preferredScreen: NSScreen? = nil,
        stagedForAllSpaces: Bool = false
    ) {
        guard let placement = overlayPlacementContextForNextOverlay(preferredScreen: preferredScreen) else { return }

        let shouldAvoidSpaceSwitch = hasFullscreenWindowOnScreen(placement.screen)
        let shouldStageAsAccessory = dependencies.shouldStageAsAccessory() || shouldAvoidSpaceSwitch

        if !stagedForAllSpaces && shouldStageAsAccessory {
            if NSApp.activationPolicy() != .accessory {
                NSApp.setActivationPolicy(.accessory)
            }
            if NSApp.isActive {
                NSApp.deactivate()
            }
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.08) { [weak self] in
                self?.show(
                    initialQuickSearchSource: initialQuickSearchSource,
                    preferredScreen: placement.screen,
                    stagedForAllSpaces: true
                )
            }
            return
        }

        if window?.isVisible == true {
            hide(force: true)
        } else if let existingWindow = window {
            existingWindow.orderOut(nil)
            window = nil
        }
        avoidsSpaceSwitch = shouldAvoidSpaceSwitch

        let newWindow = makeOverlayWindow(
            on: placement.screen,
            initialQuickSearchSource: initialQuickSearchSource
        )
        generation &+= 1
        window = newWindow
        dependencies.installOverlayKeyMonitor()
        if shouldStageAsAccessory {
            if NSApp.isActive {
                NSApp.deactivate()
            }
            if NSApp.activationPolicy() != .accessory {
                NSApp.setActivationPolicy(.accessory)
            }
        }

        let targetLevel = dependencies.overlayLevel(initialQuickSearchSource)
        newWindow.setFrame(placement.frame, display: true)
        newWindow.level = targetLevel
        orderFront(newWindow)

        let placementFrame = placement.frame
        let finishForegroundClaim: () -> Void = { [weak self, weak newWindow] in
            guard let self, let newWindow, self.window === newWindow else { return }
            self.dependencies.refreshChromeState(!shouldAvoidSpaceSwitch, shouldAvoidSpaceSwitch)
            if newWindow.frame != placementFrame {
                newWindow.setFrame(placementFrame, display: true)
                self.orderFront(newWindow)
            }
            if let settingsWindow = self.dependencies.settingsWindow(), settingsWindow.isVisible {
                self.dependencies.prepareSettingsWindow(settingsWindow)
            }
            self.dependencies.onDidShow()
        }

        if !dependencies.isSettingsVisible() {
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.12, execute: finishForegroundClaim)
        } else {
            finishForegroundClaim()
        }
    }

    func hide(force: Bool = false, discardWindow: Bool = false) {
        guard force || dependencies.canHideOverlay() else { return }
        generation &+= 1
        dependencies.onWillHide()
        if let settingsWindow = dependencies.settingsWindow(), settingsWindow.parent == window {
            dependencies.detachSettingsWindow(settingsWindow)
        }
        window?.orderOut(nil)
        dependencies.removeOverlayKeyMonitor()
        dependencies.removeQuickSearchMouseMonitor()
        avoidsSpaceSwitch = false
        dependencies.refreshChromeState(false, false)
        dependencies.onDidHide()
        if discardWindow {
            window = nil
        }
    }

    func screenUnderMouse() -> NSScreen? {
        overlayPlacementContextForNextOverlay(preferredScreen: nil)?.screen
    }

    func screenContainingCurrentPointer() -> NSScreen? {
        let mousePoint = NSEvent.mouseLocation
        return NSScreen.screens.first(where: {
            NSMouseInRect(mousePoint, $0.frame, false)
        })
    }

    private func moveToCurrentPlacement(preferredScreen: NSScreen?) {
        guard let window,
              let placement = overlayPlacementContextForNextOverlay(preferredScreen: preferredScreen),
              window.frame != placement.frame
        else { return }
        window.setFrame(placement.frame, display: true)
    }

    private func makeOverlayWindow(on screen: NSScreen, initialQuickSearchSource: String?) -> NSWindow {
        let panel = OverlayPanel(
            contentRect: screen.frame,
            styleMask: [.borderless, .fullSizeContentView, .nonactivatingPanel],
            backing: .buffered,
            defer: false
        )
        panel.isFloatingPanel = true
        panel.hidesOnDeactivate = false
        panel.collectionBehavior = [
            .canJoinAllSpaces,
            .fullScreenAuxiliary,
            .stationary,
            .transient,
            .ignoresCycle
        ]
        panel.isOpaque = false
        panel.backgroundColor = NSColor.black.withAlphaComponent(0.001)
        panel.hasShadow = false
        panel.titlebarAppearsTransparent = true
        panel.titleVisibility = .hidden
        panel.isReleasedWhenClosed = false
        panel.contentView = dependencies.makeContentView(initialQuickSearchSource)
        return panel
    }

    private func orderFront(_ window: NSWindow) {
        window.makeKeyAndOrderFront(nil)
        window.orderFrontRegardless()
    }

    private func overlayPlacementContextForNextOverlay(preferredScreen: NSScreen?) -> OverlayPlacementContext? {
        if let screen = preferredScreen {
            return OverlayPlacementContext(screen: screen, frame: screen.frame)
        }
        guard let screen = screenContainingCurrentPointer() ?? NSScreen.main ?? NSScreen.screens.first else {
            return nil
        }
        return OverlayPlacementContext(screen: screen, frame: screen.frame)
    }

    private func hasFullscreenWindowOnScreen(_ screen: NSScreen) -> Bool {
        let screenFrame = screen.frame
        let windowFrames = foreignLayerZeroWindows(on: screenFrame)

        if windowFrames.contains(where: { isSingleFullscreenWindow($0.frame, on: screenFrame) }) {
            return true
        }

        return hasSplitViewFullscreenWindows(windowFrames, on: screenFrame)
    }

    private func foreignLayerZeroWindows(on screenFrame: NSRect) -> [ForeignWindowFrame] {
        let windows = CGWindowListCopyWindowInfo([.optionOnScreenOnly, .excludeDesktopElements], kCGNullWindowID) as? [[String: Any]] ?? []
        return windows.compactMap { info in
            guard let owner = info[kCGWindowOwnerName as String] as? String,
                  owner != AppIdentity.displayName,
                  owner != "Window Server",
                  owner != "Dock",
                  owner != "loginwindow",
                  let layer = info[kCGWindowLayer as String] as? Int,
                  layer == 0,
                  let bounds = info[kCGWindowBounds as String] as? NSDictionary
            else { return nil }

            let frame = NSRect(
                x: cgWindowDimension(bounds, "X"),
                y: cgWindowDimension(bounds, "Y"),
                width: cgWindowDimension(bounds, "Width"),
                height: cgWindowDimension(bounds, "Height")
            )
            guard frame.intersects(screenFrame) else { return nil }
            return ForeignWindowFrame(owner: owner, frame: frame)
        }
    }

    private func isSingleFullscreenWindow(_ windowFrame: NSRect, on screenFrame: NSRect) -> Bool {
        let widthMatches = abs(windowFrame.width - screenFrame.width) <= 12
        let heightMatches = windowFrame.height >= screenFrame.height * 0.88
        let horizontallyAligned = abs(windowFrame.midX - screenFrame.midX) <= 12
        let verticallyAligned = abs(windowFrame.maxY - screenFrame.maxY) <= 32
        return widthMatches && heightMatches && horizontallyAligned && verticallyAligned
    }

    private func hasSplitViewFullscreenWindows(_ windows: [ForeignWindowFrame], on screenFrame: NSRect) -> Bool {
        let clippedWindows = windows.map {
            ForeignWindowFrame(owner: $0.owner, frame: $0.frame.intersection(screenFrame))
        }
        let tallWindows = clippedWindows
            .filter { window in
                let frame = window.frame
                return frame.height >= screenFrame.height * 0.86
                    && frame.width >= screenFrame.width * 0.20
                    && frame.width <= screenFrame.width * 0.86
                    && abs(frame.maxY - screenFrame.maxY) <= 32
            }
            .sorted { $0.frame.minX < $1.frame.minX }

        guard tallWindows.count >= 2 else { return false }

        for startIndex in tallWindows.indices {
            var union = tallWindows[startIndex].frame
            var lastMaxX = union.maxX

            for window in tallWindows.dropFirst(startIndex + 1) {
                let gap = window.frame.minX - lastMaxX
                if gap < -32 || gap > 48 {
                    break
                }
                union = union.union(window.frame)
                lastMaxX = max(lastMaxX, window.frame.maxX)

                let touchesLeft = abs(union.minX - screenFrame.minX) <= 32
                let touchesRight = abs(union.maxX - screenFrame.maxX) <= 32
                let coversWidth = union.width >= screenFrame.width * 0.92
                let coversHeight = union.height >= screenFrame.height * 0.86
                if touchesLeft && touchesRight && coversWidth && coversHeight {
                    return true
                }
            }
        }

        return false
    }

    private func cgWindowDimension(_ bounds: NSDictionary, _ key: String) -> CGFloat {
        if let value = bounds[key] as? CGFloat {
            return value
        }
        if let value = bounds[key] as? NSNumber {
            return CGFloat(truncating: value)
        }
        return 0
    }
}

 TODO.md

@@ -13,11 +13,6 @@

## Todo

- [2026-05-28] OverlayWindowController 收口。
  - 目标: 把 `AppDelegate` 里的 overlay 显示、隐藏、层级、屏幕选择拆出去。
  - 时机: Quick Search 窗口边界稳定后再做。
  - 验收: 全屏、Split View、Settings、Force Quit、文件面板、Dock 图标重复问题。

- [2026-05-28] AppLibraryController / 数据刷新管线整理。
  - 目标: 把扫描、reconcile、Smart Start、annotate、Quick Search documents 更新从 `ContentView` 中抽离。
  - 验收: 启动扫描、拖拽改标签、Quick Search 索引同步、新安装 App 后刷新。
@@ -28,6 +23,12 @@

## Done

- [2026-05-29] OverlayWindowController 收口。
  - 提交: 本次提交
  - 结果: 新增 `OverlayWindowController`，将 overlay window 实例、generation、Space 避让、show/focus/hide 编排、panel 创建、屏幕选择、全屏/Split View 判定从 `AppDelegate` 中收口出去。
  - 范围: AppDelegate 保留菜单、热键、Settings、Quick Search 和 app chrome 协调入口；窗口策略保持原行为。
  - 验证: `bash build.sh`、`codesign --verify --deep --strict`、`Scripts/window_logic_qa.sh` 全部通过，覆盖全屏、Split View、Settings、Force Quit、文件面板、Dock 图标重复和屏幕跟随。

- [2026-05-29] Quick Search 独立面板化。
  - 提交: 本次提交
  - 结果: Quick Search 面板已从主 overlay SwiftUI 层拆出，改为独立 `NSPanel` 并作为 overlay child window 显示；搜索状态、输入框、结果列表、启动逻辑保持原路径。