//
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// EKAttributes+BackgroundStyle.swift
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// SwiftEntryKit
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//
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// Created by Daniel Huri on 4/21/18.
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// Copyright (c) 2018 huri000@gmail.com. All rights reserved.
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//
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import UIKit
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public extension EKAttributes {
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/** The background style property */
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enum BackgroundStyle: Equatable {
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/** Blur style for light and dark modes */
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public struct BlurStyle: Equatable {
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public static var extra: BlurStyle {
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return BlurStyle(light: .extraLight, dark: .dark)
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}
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public static var standard: BlurStyle {
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return BlurStyle(light: .light, dark: .dark)
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}
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@available(iOS 10.0, *)
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public static var prominent: BlurStyle {
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return BlurStyle(light: .prominent, dark: .prominent)
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}
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public static var dark: BlurStyle {
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return BlurStyle(light: .dark, dark: .dark)
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}
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let light: UIBlurEffect.Style
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let dark: UIBlurEffect.Style
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public init(style: UIBlurEffect.Style) {
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self.light = style
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self.dark = style
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}
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public init(light: UIBlurEffect.Style, dark: UIBlurEffect.Style) {
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self.light = light
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self.dark = dark
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}
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/** Computes a proper `UIBlurEffect.Style` instance */
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public func blurStyle(for traits: UITraitCollection,
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mode: EKAttributes.DisplayMode) -> UIBlurEffect.Style {
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switch mode {
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case .inferred:
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if #available(iOS 13, *) {
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switch traits.userInterfaceStyle {
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case .light, .unspecified:
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return light
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case .dark:
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return dark
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@unknown default:
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return light
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}
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} else {
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return light
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}
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case .light:
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return light
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case .dark:
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return dark
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}
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}
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public func blurEffect(for traits: UITraitCollection,
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mode: EKAttributes.DisplayMode) -> UIBlurEffect {
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return UIBlurEffect(style: blurStyle(for: traits, mode: mode))
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}
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}
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/** Gradient background style */
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public struct Gradient {
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public var colors: [EKColor]
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public var startPoint: CGPoint
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public var endPoint: CGPoint
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public init(colors: [EKColor],
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startPoint: CGPoint,
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endPoint: CGPoint) {
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self.colors = colors
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self.startPoint = startPoint
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self.endPoint = endPoint
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}
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}
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/** Visual Effect (Blurred) background style */
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case visualEffect(style: BlurStyle)
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/** Color background style */
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case color(color: EKColor)
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/** Gradient background style */
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case gradient(gradient: Gradient)
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/** Image background style */
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case image(image: UIImage)
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/** Clear background style */
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case clear
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/** == operator overload */
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public static func == (lhs: EKAttributes.BackgroundStyle,
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rhs: EKAttributes.BackgroundStyle) -> Bool {
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switch (lhs, rhs) {
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case (visualEffect(style: let leftStyle),
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visualEffect(style: let rightStyle)):
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return leftStyle == rightStyle
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case (color(color: let leftColor),
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color(color: let rightColor)):
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return leftColor == rightColor
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case (image(image: let leftImage),
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image(image: let rightImage)):
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return leftImage == rightImage
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case (gradient(gradient: let leftGradient),
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gradient(gradient: let rightGradient)):
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for (leftColor, rightColor) in zip(leftGradient.colors, rightGradient.colors) {
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guard leftColor == rightColor else {
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return false
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}
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}
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return leftGradient.startPoint == rightGradient.startPoint &&
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leftGradient.endPoint == rightGradient.endPoint
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case (clear, clear):
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return true
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default:
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return false
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}
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}
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}
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}
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