#if os(iOS) || os(tvOS) || os(watchOS)
import UIKit
typealias SWColor = UIColor
#else
import Cocoa
typealias SWColor = NSColor
#endif
private extension Int64 {
func duplicate4bits() -> Int64 {
return (self << 4) + self
}
}
public extension SWColor {
private convenience init?(hex3: Int64, alpha: Float) {
self.init(red: CGFloat( ((hex3 & 0xF00) >> 8).duplicate4bits() ) / 255.0,
green: CGFloat( ((hex3 & 0x0F0) >> 4).duplicate4bits() ) / 255.0,
blue: CGFloat( ((hex3 & 0x00F) >> 0).duplicate4bits() ) / 255.0,
alpha: CGFloat(alpha))
}
private convenience init?(hex4: Int64, alpha: Float?) {
self.init(red: CGFloat( ((hex4 & 0xF000) >> 12).duplicate4bits() ) / 255.0,
green: CGFloat( ((hex4 & 0x0F00) >> 8).duplicate4bits() ) / 255.0,
blue: CGFloat( ((hex4 & 0x00F0) >> 4).duplicate4bits() ) / 255.0,
alpha: alpha.map(CGFloat.init(_:)) ?? CGFloat( ((hex4 & 0x000F) >> 0).duplicate4bits() ) / 255.0)
}
private convenience init?(hex6: Int64, alpha: Float) {
self.init(red: CGFloat( (hex6 & 0xFF0000) >> 16 ) / 255.0,
green: CGFloat( (hex6 & 0x00FF00) >> 8 ) / 255.0,
blue: CGFloat( (hex6 & 0x0000FF) >> 0 ) / 255.0, alpha: CGFloat(alpha))
}
private convenience init?(hex8: Int64, alpha: Float?) {
self.init(red: CGFloat( (hex8 & 0xFF000000) >> 24 ) / 255.0,
green: CGFloat( (hex8 & 0x00FF0000) >> 16 ) / 255.0,
blue: CGFloat( (hex8 & 0x0000FF00) >> 8 ) / 255.0,
alpha: alpha.map(CGFloat.init(_:)) ?? CGFloat( (hex8 & 0x000000FF) >> 0 ) / 255.0)
}
convenience init?(hexString: String, alpha: Float? = nil) {
var hex = hexString
if hex.hasPrefix("#") {
hex = String(hex[hex.index(after: hex.startIndex)...])
}
guard let hexVal = Int64(hex, radix: 16) else {
self.init()
return nil
}
switch hex.count {
case 3:
self.init(hex3: hexVal, alpha: alpha ?? 1.0)
case 4:
self.init(hex4: hexVal, alpha: alpha)
case 6:
self.init(hex6: hexVal, alpha: alpha ?? 1.0)
case 8:
self.init(hex8: hexVal, alpha: alpha)
default:
self.init()
return nil
}
}
convenience init?(hex: Int, alpha: Float = 1.0) {
if (0x000000 ... 0xFFFFFF) ~= hex {
self.init(hex6: Int64(hex), alpha: alpha)
} else {
self.init()
return nil
}
}
convenience init?(argbHex: Int) {
if (0x00000000 ... 0xFFFFFFFF) ~= argbHex {
let hex = Int64(argbHex)
self.init(red: CGFloat( (hex & 0x00FF0000) >> 16 ) / 255.0,
green: CGFloat( (hex & 0x0000FF00) >> 8 ) / 255.0,
blue: CGFloat( (hex & 0x000000FF) >> 0 ) / 255.0,
alpha: CGFloat( (hex & 0xFF000000) >> 24 ) / 255.0)
} else {
self.init()
return nil
}
}
convenience init?(argbHexString: String) {
var hex = argbHexString
if hex.hasPrefix("#") {
hex = String(hex[hex.index(after: hex.startIndex)...])
}
guard hex.count == 8, let hexVal = Int64(hex, radix: 16) else {
self.init()
return nil
}
self.init(red: CGFloat( (hexVal & 0x00FF0000) >> 16 ) / 255.0,
green: CGFloat( (hexVal & 0x0000FF00) >> 8 ) / 255.0,
blue: CGFloat( (hexVal & 0x000000FF) >> 0 ) / 255.0,
alpha: CGFloat( (hexVal & 0xFF000000) >> 24 ) / 255.0)
}
}