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87 lines
3.0 KiB
Swift
87 lines
3.0 KiB
Swift
//
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// GradientFill.swift
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// lottie-swift
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//
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// Created by Brandon Withrow on 1/8/19.
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//
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import Foundation
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enum GradientType: Int, Codable {
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case none
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case linear
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case radial
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}
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/// An item that define a gradient fill
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final class GradientFill: ShapeItem {
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/// The opacity of the fill
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let opacity: KeyframeGroup<Vector1D>
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/// The start of the gradient
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let startPoint: KeyframeGroup<Vector3D>
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/// The end of the gradient
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let endPoint: KeyframeGroup<Vector3D>
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/// The type of gradient
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let gradientType: GradientType
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/// Gradient Highlight Length. Only if type is Radial
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let highlightLength: KeyframeGroup<Vector1D>?
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/// Highlight Angle. Only if type is Radial
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let highlightAngle: KeyframeGroup<Vector1D>?
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/// The number of color points in the gradient
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let numberOfColors: Int
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/// The Colors of the gradient.
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let colors: KeyframeGroup<[Double]>
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private enum CodingKeys : String, CodingKey {
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case opacity = "o"
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case startPoint = "s"
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case endPoint = "e"
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case gradientType = "t"
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case highlightLength = "h"
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case highlightAngle = "a"
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case colors = "g"
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}
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private enum GradientDataKeys : String, CodingKey {
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case numberOfColors = "p"
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case colors = "k"
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}
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required init(from decoder: Decoder) throws {
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let container = try decoder.container(keyedBy: GradientFill.CodingKeys.self)
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self.opacity = try container.decode(KeyframeGroup<Vector1D>.self, forKey: .opacity)
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self.startPoint = try container.decode(KeyframeGroup<Vector3D>.self, forKey: .startPoint)
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self.endPoint = try container.decode(KeyframeGroup<Vector3D>.self, forKey: .endPoint)
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self.gradientType = try container.decode(GradientType.self, forKey: .gradientType)
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self.highlightLength = try container.decodeIfPresent(KeyframeGroup<Vector1D>.self, forKey: .highlightLength)
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self.highlightAngle = try container.decodeIfPresent(KeyframeGroup<Vector1D>.self, forKey: .highlightAngle)
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let colorsContainer = try container.nestedContainer(keyedBy: GradientDataKeys.self, forKey: .colors)
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self.colors = try colorsContainer.decode(KeyframeGroup<[Double]>.self, forKey: .colors)
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self.numberOfColors = try colorsContainer.decode(Int.self, forKey: .numberOfColors)
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try super.init(from: decoder)
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}
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override func encode(to encoder: Encoder) throws {
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try super.encode(to: encoder)
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var container = encoder.container(keyedBy: CodingKeys.self)
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try container.encode(opacity, forKey: .opacity)
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try container.encode(startPoint, forKey: .startPoint)
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try container.encode(endPoint, forKey: .endPoint)
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try container.encode(gradientType, forKey: .gradientType)
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try container.encodeIfPresent(highlightLength, forKey: .highlightLength)
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try container.encodeIfPresent(highlightAngle, forKey: .highlightAngle)
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var colorsContainer = container.nestedContainer(keyedBy: GradientDataKeys.self, forKey: .colors)
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try colorsContainer.encode(numberOfColors, forKey: .numberOfColors)
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try colorsContainer.encode(colors, forKey: .colors)
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}
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}
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