stephancasas · June 16, 2024 09:51
diff --git a/CGWindowDictionary.swift b/CGWindowDictionary.swift
 //
 //  CGWindowDictionary.swift
 //
 //  Created by Stephan Casas on 11/2/23.
 //

 import Foundation;
 import CoreGraphics;
 import AppKit;

 typealias CGWindowDictionary = [CFString: Any];

 // MARK: - Utilities

 /// A convenience type for working with the CFDictionary values returned by `CGWindowListCopyWindowInfo(_:, _:)`.
 extension CGWindowDictionary {
    
    /// Get a list of modernized window representations as `[CGWindowDictionary]` using
    /// the given constraints.
    /// - Parameters:
    ///   - option: The native window list filter option.
    ///   - window: The relative window when considering ordered window list filters.
    /// - Returns: An array of `CGWindowDictionary` types which match the given parameters.
    static func list(
        matching option: CGWindowListOption = .optionAll,
        relativeTo window: CGWindowID = kCGNullWindowID,
        where isIncluded: ((CGWindowDictionary) -> Bool)? = nil
    ) -> [CGWindowDictionary] {
        let windowList = CGWindowListCopyWindowInfo(
            option, window
        ) as? [CGWindowDictionary] ?? [];
        
        guard let isIncluded = isIncluded else {
            return windowList;
        }
        
        return windowList.filter(isIncluded);
    }
    
    /// Get the frontmost window dictionary for the window which is both on-screen and the
    /// frontmost window owned by the given process identifier.
    /// - Parameter owner: The window-owning process for which the frontmost window should be resolved.
    /// - Returns: The dictionary representation of the frontmost window of the given process.
    static func frontmost(for owner: pid_t) -> CGWindowDictionary? {
        var windowList = CGWindowDictionary.list(
            matching: .optionOnScreenOnly,
            where: { $0.processIdentifier == owner });
        
        var frontmost: CGWindowDictionary?;
        while windowList.count > 1 {
            guard let _frontmost = windowList.first else {
                return frontmost;
            }
            
            frontmost = _frontmost;
            
            windowList = CGWindowDictionary.list(
                matching: .optionOnScreenAboveWindow,
                relativeTo: _frontmost.id,
                where: { $0.processIdentifier == owner });
        }
        
        return frontmost;
    }
    
 }

 // MARK: - Typecast Properties

 extension CGWindowDictionary {
    
    /// The window server-tracked window ID for this window.
    var id: CGWindowID {
        self[kCGWindowNumber] as! CGWindowID
    }
    
    /// The process name for the process which owns this window.
    var processName: String {
        self[kCGWindowOwnerName] as! String;
    }
    
    /// The process identifier for the process which owns this window.
    var processIdentifier: pid_t {
        self[kCGWindowOwnerPID] as! pid_t
    }
    
    /// The title of this window.
    var name: String {
        (self[kCGWindowName] as? String) ?? ""
    }
    
    /// The window's bounds in the Quartz/CoreGraphics coordinate space — where `(0, 0)` is at the leftmost-lowermost point of the display which owns the space with the lowest ordered index value.
    var bounds: CGRect {
        .init(dictionaryRepresentation: self[kCGWindowBounds] as! CFDictionary)!
    }
    
    /// The layer at which this window draws.
    var layer: Int32 {
        self[kCGWindowLayer] as! Int32
    }
    
    /// The window's bounds in the AppKit coordinate space — where `(0, 0)` is at the leftmost-uppermost point of the display which owns the space with the lowest ordered index value.
    var appKitBounds: CGRect {
        guard
            let NSCGSWindow = objc_getClass(
                "NSCGSWindow") as? AnyClass,
            let convertRectFromCGCoordinatesPtr = class_getClassMethod(
                NSCGSWindow, Selector(("convertRectFromCGCoordinates:")))
        else { fatalError(
            "Could not load private class method +[NSCGSWindow convertRectFromCGCoordinates:]."
        ) }
        
        return unsafeBitCast(
            method_getImplementation(convertRectFromCGCoordinatesPtr),
            to: (@convention(c) (CGRect) -> CGRect).self
        )(self.bounds);
    }
    
 }
	//
	// CGWindowDictionary.swift
	//
	// Created by Stephan Casas on 11/2/23.
	//

	import Foundation;
	import CoreGraphics;
	import AppKit;

	typealias CGWindowDictionary = [CFString: Any];

	// MARK: - Utilities

	/// A convenience type for working with the CFDictionary values returned by `CGWindowListCopyWindowInfo(_:, _:)`.
	extension CGWindowDictionary {

	/// Get a list of modernized window representations as `[CGWindowDictionary]` using
	/// the given constraints.
	/// - Parameters:
	/// - option: The native window list filter option.
	/// - window: The relative window when considering ordered window list filters.
	/// - Returns: An array of `CGWindowDictionary` types which match the given parameters.
	static func list(
	matching option: CGWindowListOption = .optionAll,
	relativeTo window: CGWindowID = kCGNullWindowID,
	where isIncluded: ((CGWindowDictionary) -> Bool)? = nil
	) -> [CGWindowDictionary] {
	let windowList = CGWindowListCopyWindowInfo(
	option, window
	) as? [CGWindowDictionary] ?? [];

	guard let isIncluded = isIncluded else {
	return windowList;
	}

	return windowList.filter(isIncluded);
	}

	/// Get the frontmost window dictionary for the window which is both on-screen and the
	/// frontmost window owned by the given process identifier.
	/// - Parameter owner: The window-owning process for which the frontmost window should be resolved.
	/// - Returns: The dictionary representation of the frontmost window of the given process.
	static func frontmost(for owner: pid_t) -> CGWindowDictionary? {
	var windowList = CGWindowDictionary.list(
	matching: .optionOnScreenOnly,
	where: { $0.processIdentifier == owner });

	var frontmost: CGWindowDictionary?;
	while windowList.count > 1 {
	guard let _frontmost = windowList.first else {
	return frontmost;
	}

	frontmost = _frontmost;

	windowList = CGWindowDictionary.list(
	matching: .optionOnScreenAboveWindow,
	relativeTo: _frontmost.id,
	where: { $0.processIdentifier == owner });
	}

	return frontmost;
	}

	}

	// MARK: - Typecast Properties

	extension CGWindowDictionary {

	/// The window server-tracked window ID for this window.
	var id: CGWindowID {
	self[kCGWindowNumber] as! CGWindowID
	}

	/// The process name for the process which owns this window.
	var processName: String {
	self[kCGWindowOwnerName] as! String;
	}

	/// The process identifier for the process which owns this window.
	var processIdentifier: pid_t {
	self[kCGWindowOwnerPID] as! pid_t
	}

	/// The title of this window.
	var name: String {
	(self[kCGWindowName] as? String) ?? ""
	}

	/// The window's bounds in the Quartz/CoreGraphics coordinate space — where `(0, 0)` is at the leftmost-lowermost point of the display which owns the space with the lowest ordered index value.
	var bounds: CGRect {
	.init(dictionaryRepresentation: self[kCGWindowBounds] as! CFDictionary)!
	}

	/// The layer at which this window draws.
	var layer: Int32 {
	self[kCGWindowLayer] as! Int32
	}

	/// The window's bounds in the AppKit coordinate space — where `(0, 0)` is at the leftmost-uppermost point of the display which owns the space with the lowest ordered index value.
	var appKitBounds: CGRect {
	guard
	let NSCGSWindow = objc_getClass(
	"NSCGSWindow") as? AnyClass,
	let convertRectFromCGCoordinatesPtr = class_getClassMethod(
	NSCGSWindow, Selector(("convertRectFromCGCoordinates:")))
	else { fatalError(
	"Could not load private class method +[NSCGSWindow convertRectFromCGCoordinates:]."
	) }

	return unsafeBitCast(
	method_getImplementation(convertRectFromCGCoordinatesPtr),
	to: (@convention(c) (CGRect) -> CGRect).self
	)(self.bounds);
	}

	}