76 lines
1.5 KiB
Swift
76 lines
1.5 KiB
Swift
//
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// ShapeContainerLayer.swift
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// lottie-swift
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//
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// Created by Brandon Withrow on 1/30/19.
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//
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import Foundation
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import QuartzCore
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/// The base layer that holds Shapes and Shape Renderers
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class ShapeContainerLayer: CALayer {
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// MARK: Lifecycle
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override init() {
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super.init()
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actions = [
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"position" : NSNull(),
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"bounds" : NSNull(),
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"anchorPoint" : NSNull(),
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"transform" : NSNull(),
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"opacity" : NSNull(),
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"hidden" : NSNull(),
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]
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}
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required init?(coder _: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override init(layer: Any) {
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guard let layer = layer as? ShapeContainerLayer else {
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fatalError("init(layer:) wrong class.")
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}
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super.init(layer: layer)
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}
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// MARK: Internal
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private(set) var renderLayers: [ShapeContainerLayer] = []
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var renderScale: CGFloat = 1 {
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didSet {
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updateRenderScale()
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}
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}
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func insertRenderLayer(_ layer: ShapeContainerLayer) {
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renderLayers.append(layer)
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insertSublayer(layer, at: 0)
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}
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func markRenderUpdates(forFrame: CGFloat) {
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if hasRenderUpdate(forFrame: forFrame) {
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rebuildContents(forFrame: forFrame)
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}
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guard isHidden == false else { return }
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renderLayers.forEach { $0.markRenderUpdates(forFrame: forFrame) }
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}
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func hasRenderUpdate(forFrame _: CGFloat) -> Bool {
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false
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}
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func rebuildContents(forFrame _: CGFloat) {
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/// Override
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}
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func updateRenderScale() {
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contentsScale = renderScale
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renderLayers.forEach({ $0.renderScale = renderScale })
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}
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}
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