maksarsanjeev
60 lines
2.0 KiB
Swift
60 lines
2.0 KiB
Swift
import SwiftUI
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import CoreGraphics
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// Hex color helpers shared by the Mac app and the iPhone app.
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// Views ask for the same few dozen hex colours on every frame: parse each string once.
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private enum HexCache {
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nonisolated(unsafe) static var colors: [String: Color] = [:]
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nonisolated(unsafe) static var cgColors: [String: CGColor] = [:]
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static let lock = NSLock()
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}
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// MARK: - Color from hex string
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extension Color {
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init(hex: String) {
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HexCache.lock.lock()
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if let c = HexCache.colors[hex] { HexCache.lock.unlock(); self = c; return }
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HexCache.lock.unlock()
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let h = hex.trimmingCharacters(in: CharacterSet(charactersIn: "#"))
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let val = UInt64(h, radix: 16) ?? 0
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let r = Double((val >> 16) & 0xFF) / 255
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let g = Double((val >> 8) & 0xFF) / 255
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let b = Double( val & 0xFF) / 255
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self.init(red: r, green: g, blue: b)
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HexCache.lock.lock(); HexCache.colors[hex] = self; HexCache.lock.unlock()
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}
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}
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// MARK: - CGColor from hex string
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func cgColorFromHex(_ hex: String) -> CGColor? {
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HexCache.lock.lock()
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if let c = HexCache.cgColors[hex] { HexCache.lock.unlock(); return c }
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HexCache.lock.unlock()
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let h = hex.trimmingCharacters(in: CharacterSet(charactersIn: "#"))
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guard let val = UInt64(h, radix: 16) else { return nil }
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let r = CGFloat((val >> 16) & 0xFF) / 255
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let g = CGFloat((val >> 8) & 0xFF) / 255
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let b = CGFloat( val & 0xFF) / 255
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let c = CGColor(red: r, green: g, blue: b, alpha: 1)
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HexCache.lock.lock(); HexCache.cgColors[hex] = c; HexCache.lock.unlock()
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return c
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}
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extension CGColor {
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static func from(_ hex: String) -> CGColor {
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cgColorFromHex(hex) ?? CGColor(gray: 0.5, alpha: 1)
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}
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}
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#if !os(macOS)
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// CGColor.white / .black / .clear only exist on macOS; BotEngine uses them.
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extension CGColor {
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static var white: CGColor { CGColor(gray: 1, alpha: 1) }
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static var black: CGColor { CGColor(gray: 0, alpha: 1) }
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static var clear: CGColor { CGColor(gray: 0, alpha: 0) }
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}
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#endif
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