Color Picker Extension

[HuakunShen]

Sample CLI swift code, get value from stdout.

import AppKit

struct Color: Encodable {
    let red: Float
    let blue: Float
    let green: Float
    let alpha: Float
    let colorSpace: String
}

struct ColorPickerCLI {

    static func pickColor() async -> Color? {
        let colorSampler = NSColorSampler()
        guard let color = await colorSampler.sample()?.usingColorSpace(.displayP3) else {
            return nil
        }
        
        return Color(
            red: Float(color.redComponent),
            blue: Float(color.blueComponent),
            green: Float(color.greenComponent),
            alpha: Float(color.alphaComponent),
            colorSpace: "p3"
        )
    }

    static func run() {
        // Run the asynchronous color picking in a Task
        Task {
            if let color = await pickColor() {
                print("Color picked:")
                print("Red: \(color.red)")
                print("Green: \(color.green)")
                print("Blue: \(color.blue)")
                print("Alpha: \(color.alpha)")
                print("Color Space: \(color.colorSpace)")
                // Exit the program after printing the color information
                exit(0)
            } else {
                print("No color picked or an error occurred.")
            }
        }
        // Keep the program running to allow async tasks to finish
        RunLoop.current.run()
    }
}

ColorPickerCLI.run()