// // ArticleExtractorButton.swift // NetNewsWire // // Created by Maurice Parker on 9/18/19. // Copyright © 2019 Ranchero Software. All rights reserved. // import Foundation class ArticleExtractorButton: NSButton { var isError = false { didSet { if isError != oldValue { needsDisplay = true } } } var isInProgress = false { didSet { if isInProgress != oldValue { needsDisplay = true } } } override init(frame frameRect: NSRect) { super.init(frame: frameRect) wantsLayer = true } required init?(coder: NSCoder) { super.init(coder: coder) wantsLayer = true } override func draw(_ dirtyRect: NSRect) { super.draw(dirtyRect) guard let hostedLayer = self.layer else { return } if let imageLayer = hostedLayer.sublayers?[0] { if needsToDraw(imageLayer.bounds) { imageLayer.removeFromSuperlayer() } else { return } } let opacity: Float = isEnabled ? 1.0 : 0.5 switch true { case isError: addImageSublayer(to: hostedLayer, image: AppAssets.articleExtractorError, opacity: opacity) case isInProgress: addAnimatedSublayer(to: hostedLayer) default: if NSApplication.shared.isActive { addImageSublayer(to: hostedLayer, image: AppAssets.articleExtractor, opacity: opacity) } else { if NSApplication.shared.effectiveAppearance.isDarkMode { addImageSublayer(to: hostedLayer, image: AppAssets.articleExtractorInactiveDark, opacity: opacity) } else { addImageSublayer(to: hostedLayer, image: AppAssets.articleExtractorInactiveLight, opacity: opacity) } } } } private func makeLayerForImage(_ image: NSImage) -> CALayer { let imageLayer = CALayer() imageLayer.bounds = CGRect(x: 0, y: 0, width: image.size.width, height: image.size.height) imageLayer.position = CGPoint(x: bounds.midX, y: bounds.midY) return imageLayer } private func addImageSublayer(to hostedLayer: CALayer, image: NSImage, opacity: Float = 1.0) { let imageLayer = makeLayerForImage(image) imageLayer.contents = image imageLayer.opacity = opacity hostedLayer.addSublayer(imageLayer) } private func addAnimatedSublayer(to hostedLayer: CALayer) { let imageProgress1 = AppAssets.articleExtractorProgress1 let imageProgress2 = AppAssets.articleExtractorProgress2 let imageProgress3 = AppAssets.articleExtractorProgress3 let imageProgress4 = AppAssets.articleExtractorProgress4 let images = [imageProgress1, imageProgress2, imageProgress3, imageProgress4, imageProgress3, imageProgress2] let imageLayer = CALayer() imageLayer.bounds = CGRect(x: 0, y: 0, width: imageProgress1?.size.width ?? 0, height: imageProgress1?.size.height ?? 0) imageLayer.position = CGPoint(x: bounds.midX, y: bounds.midY) hostedLayer.addSublayer(imageLayer) let animation = CAKeyframeAnimation(keyPath: "contents") animation.calculationMode = CAAnimationCalculationMode.linear animation.keyTimes = [0, 0.2, 0.4, 0.6, 0.8, 1] animation.duration = 2 animation.values = images as [Any] animation.repeatCount = HUGE imageLayer.add(animation, forKey: "contents") } }