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[Paywalls V2] Add purchase button activity indicator (#4787)
* This mostly works * Improved the code and added preview * Add some comments and cleanup code * More lint * Make word for macos * Maybe this * This will work
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100
RevenueCatUI/Templates/V2/ViewHelpers/ProgressViewModifier.swift
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| // | ||
| // Copyright RevenueCat Inc. All Rights Reserved. | ||
| // | ||
| // Licensed under the MIT License (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://opensource.org/licenses/MIT | ||
| // | ||
| // ProgressViewModifier.swift | ||
| // | ||
| // Created by Josh Holtz on 2/13/25. | ||
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| #if !os(macOS) && !os(tvOS) // For Paywalls V2 | ||
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| import SwiftUI | ||
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| @available(iOS 15.0, macOS 12.0, tvOS 15.0, watchOS 8.0, *) | ||
| struct ProgressViewModifier: ViewModifier { | ||
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| @Environment(\.colorScheme) | ||
| private var colorScheme | ||
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| var backgroundStyle: BackgroundStyle? | ||
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| func body(content: Content) -> some View { | ||
| content | ||
| #if !os(watchOS) | ||
| .background(.ultraThinMaterial) | ||
| #endif | ||
| .overlay(progressView) | ||
| } | ||
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| @ViewBuilder | ||
| private var progressView: some View { | ||
| switch backgroundStyle { | ||
| case .color(let displayableColorScheme): | ||
| let colorInfo = displayableColorScheme.effectiveColor(for: colorScheme) | ||
| ProgressView() | ||
| .progressViewStyle(CircularProgressViewStyle(tint: bestTint(for: colorInfo))) | ||
| case .image, .none: | ||
| ProgressView() | ||
| .progressViewStyle(CircularProgressViewStyle(tint: .white)) | ||
| } | ||
| } | ||
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| private func bestTint(for colorInfo: DisplayableColorInfo) -> Color { | ||
| switch colorInfo { | ||
| case .hex: | ||
| return colorInfo.toColor(fallback: .black).brightness() > 0.6 ? .black : .white | ||
| case .linear, .radial: | ||
| let gradient = colorInfo.toGradient() | ||
| let averageBrightness = gradient.stops | ||
| .compactMap { $0.color.brightness() } | ||
| .reduce(0, +) / CGFloat(gradient.stops.count) | ||
| return averageBrightness > 0.6 ? .black : .white | ||
| } | ||
| } | ||
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| } | ||
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| @available(iOS 15.0, macOS 12.0, tvOS 15.0, watchOS 8.0, *) | ||
| private extension Color { | ||
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| /// Calculates the perceived brightness of the color. | ||
| /// Uses the standard luminance formula for relative brightness perception. | ||
| func brightness() -> CGFloat { | ||
| #if os(macOS) | ||
| guard let nsColor = NSColor(self).usingColorSpace(.deviceRGB) else { return 1.0 } | ||
| let red = nsColor.redComponent | ||
| let green = nsColor.greenComponent | ||
| let blue = nsColor.blueComponent | ||
| #else | ||
| guard let uiColor = UIColor(self).cgColor.components, uiColor.count >= 3 else { return 1.0 } | ||
| let red = uiColor[0] | ||
| let green = uiColor[1] | ||
| let blue = uiColor[2] | ||
| #endif | ||
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| // Standard luminance coefficients for sRGB (per ITU-R BT.709) | ||
| let redCoefficient: CGFloat = 0.299 | ||
| let greenCoefficient: CGFloat = 0.587 | ||
| let blueCoefficient: CGFloat = 0.114 | ||
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| // Compute brightness using the weighted sum of RGB components | ||
| return (red * redCoefficient) + (green * greenCoefficient) + (blue * blueCoefficient) | ||
| } | ||
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| } | ||
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| @available(iOS 15.0, macOS 12.0, tvOS 15.0, watchOS 8.0, *) | ||
| extension View { | ||
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| func progressOverlay(for backgroundStyle: BackgroundStyle?) -> some View { | ||
| self.modifier(ProgressViewModifier(backgroundStyle: backgroundStyle)) | ||
| } | ||
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| } | ||
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| #endif |