90 lines
3.5 KiB
Swift
90 lines
3.5 KiB
Swift
//
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// DropShadowable.swift
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// VDS
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//
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// Created by Bandaru, Krishna Kishore on 16/02/24.
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//
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import Foundation
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import UIKit
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/**
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DropShadowable protocol helps with the configuration values for adding drop shadows for light & dark surfaces.
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*/
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protocol DropShadowable {
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///Shadow Color configuration for light and dark surfaces
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var shadowColorConfiguration: AnyColorable { get set }
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///Shadow Opacity configuration for light and dark surfaces
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var shadowOpacityConfiguration: SurfaceConfigurationValue<CGFloat> { get set }
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///Shadow Offset configuration for light and dark surfaces
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var shadowOffsetConfiguration: SurfaceConfigurationValue<CGSize> { get set }
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///Shadow Radius configuration for light and dark surfaces
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var shadowRadiusConfiguration: SurfaceConfigurationValue<CGFloat> { get set }
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}
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/**
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DropShadowableConfiguration protocol helps with multiple drop shadows configurations can be added to a view.
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*/
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protocol DropShadowableConfiguration {
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///Configurations are the DropShadowable list, these are applied on the view
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var configurations: [DropShadowable] { get }
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}
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/**
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Extension on ViewProtocol for adding drop shadows & gradient layer on view.
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*/
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extension ViewProtocol where Self: UIView {
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func addDropShadow(_ config: DropShadowable) {
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addDropShadows([config])
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}
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func addDropShadows(_ configs: [DropShadowable]) {
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removeDropShadows()
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layer.backgroundColor = backgroundColor?.cgColor
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layer.masksToBounds = false
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for config in configs {
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let shadowPath = UIBezierPath(roundedRect: bounds, cornerRadius: layer.cornerRadius)
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let shadowLayer = CALayer()
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shadowLayer.shadowPath = shadowPath.cgPath
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shadowLayer.frame = bounds
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shadowLayer.position = .init(x: bounds.midX, y: bounds.midY)
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shadowLayer.backgroundColor = backgroundColor?.cgColor
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shadowLayer.cornerRadius = layer.cornerRadius
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shadowLayer.shadowColor = config.shadowColorConfiguration.getColor(self).cgColor
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shadowLayer.shadowOpacity = Float(config.shadowOpacityConfiguration.value(for: self))
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shadowLayer.shadowOffset = config.shadowOffsetConfiguration.value(for: self)
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shadowLayer.shadowRadius = config.shadowRadiusConfiguration.value(for: self)
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shadowLayer.name = "dropShadowLayer"
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shadowLayer.shouldRasterize = true
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shadowLayer.rasterizationScale = UIScreen.main.scale
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layer.insertSublayer(shadowLayer, at: 0)
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}
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}
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func removeDropShadows() {
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layer.sublayers?.removeAll { $0.name == "dropShadowLayer" }
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}
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func addGradientLayer(with firstColor: UIColor, secondColor: UIColor) {
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removeGradientLayer()
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let gradientLayer = CAGradientLayer()
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gradientLayer.frame = bounds
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gradientLayer.startPoint = CGPoint(x: 0, y: 1)
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gradientLayer.endPoint = CGPoint(x: 1, y: 0)
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gradientLayer.position = center
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gradientLayer.shouldRasterize = true
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gradientLayer.backgroundColor = UIColor.clear.cgColor
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gradientLayer.rasterizationScale = UIScreen.main.scale
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gradientLayer.cornerRadius = layer.cornerRadius
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gradientLayer.colors = [firstColor.cgColor, secondColor.cgColor]
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gradientLayer.name = "gradientLayer"
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layer.insertSublayer(gradientLayer, at: 0)
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}
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func removeGradientLayer() {
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layer.sublayers?.removeAll { $0.name == "gradientLayer" }
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}
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}
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