78 lines
2.8 KiB
Swift
78 lines
2.8 KiB
Swift
/*
|
|
* DynamicColor
|
|
*
|
|
* Copyright 2015-present Yannick Loriot.
|
|
* http://yannickloriot.com
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
*/
|
|
|
|
import SwiftUI
|
|
|
|
@available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, *)
|
|
public extension Color {
|
|
// MARK: - Manipulating Hexa-decimal Values and Strings
|
|
|
|
/**
|
|
Creates a color from an hex string (e.g. "#3498db"). The RGBA string are also supported (e.g. "#3498dbff").
|
|
|
|
If the given hex string is invalid the initialiser will create a black color.
|
|
|
|
- parameter hexString: A hexa-decimal color string representation.
|
|
*/
|
|
init(hexString: String) {
|
|
let hexString = hexString.trimmingCharacters(in: .whitespacesAndNewlines)
|
|
let scanner = Scanner(string: hexString)
|
|
scanner.charactersToBeSkipped = CharacterSet(charactersIn: "#")
|
|
|
|
var color: UInt64 = 0
|
|
|
|
if scanner.scanHexInt64(&color) {
|
|
self.init(hex: color, useOpacity: hexString.count > 7)
|
|
}
|
|
else {
|
|
self.init(hex: 0x000000)
|
|
}
|
|
}
|
|
|
|
/**
|
|
Creates a color from an hex integer (e.g. 0x3498db).
|
|
|
|
- parameter hex: A hexa-decimal UInt64 that represents a color.
|
|
- parameter opacityChannel: If true the given hex-decimal UInt64 includes the opacity channel (e.g. 0xFF0000FF).
|
|
*/
|
|
init(hex: UInt64, useOpacity opacityChannel: Bool = false) {
|
|
let mask = UInt64(0xFF)
|
|
let cappedHex = !opacityChannel && hex > 0xffffff ? 0xffffff : hex
|
|
|
|
let r = cappedHex >> (opacityChannel ? 24 : 16) & mask
|
|
let g = cappedHex >> (opacityChannel ? 16 : 8) & mask
|
|
let b = cappedHex >> (opacityChannel ? 8 : 0) & mask
|
|
let o = opacityChannel ? cappedHex & mask : 255
|
|
|
|
let red = Double(r) / 255.0
|
|
let green = Double(g) / 255.0
|
|
let blue = Double(b) / 255.0
|
|
let opacity = Double(o) / 255.0
|
|
|
|
self.init(red: red, green: green, blue: blue, opacity: opacity)
|
|
}
|
|
}
|