6f05a08694
* Switch the TimelineController to an async sequence and fix the warnings on the UserIndicatorController
61 lines
2.5 KiB
Swift
61 lines
2.5 KiB
Swift
//
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// Copyright 2022-2024 New Vector Ltd.
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//
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// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
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// Please see LICENSE files in the repository root for full details.
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//
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import Combine
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import SwiftUI
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struct SnapshotPrecisionPreferenceKey: PreferenceKey {
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static var defaultValue: Float = 1.0
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static func reduce(value: inout Float, nextValue: () -> Float) {
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value = nextValue()
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}
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}
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struct SnapshotPerceptualPrecisionPreferenceKey: PreferenceKey {
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static var defaultValue: Float = 0.98
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static func reduce(value: inout Float, nextValue: () -> Float) {
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value = nextValue()
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}
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}
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struct FulfillmentPublisherEquatableWrapper: Equatable {
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let publisher: AnyPublisher<Bool, Never>?
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// Publisher equatability complicates things but, luckily, we're only interesting in them changing from nil
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static func == (lhs: FulfillmentPublisherEquatableWrapper, rhs: FulfillmentPublisherEquatableWrapper) -> Bool {
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lhs.publisher != nil && rhs.publisher != nil
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}
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}
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struct SnapshotFulfillmentPublisherPreferenceKey: PreferenceKey {
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static var defaultValue: FulfillmentPublisherEquatableWrapper?
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static func reduce(value: inout FulfillmentPublisherEquatableWrapper?, nextValue: () -> FulfillmentPublisherEquatableWrapper?) {
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value = nextValue()
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}
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}
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extension SwiftUI.View {
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/// Use this modifier when you want to apply snapshot-specific preferences,
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/// like delay and precision, to the view.
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/// These preferences can then be retrieved and used elsewhere in your view hierarchy.
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///
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/// - Parameters:
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/// - delay: The delay time in seconds that you want to set as a preference to the View.
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/// - precision: The percentage of pixels that must match.
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/// - perceptualPrecision: The percentage a pixel must match the source pixel to be considered a match. 98-99% mimics the precision of the human eye.
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func snapshotPreferences(expect fulfillmentPublisher: (any Publisher<Bool, Never>)? = nil,
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precision: Float = 1.0,
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perceptualPrecision: Float = 0.98) -> some SwiftUI.View {
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preference(key: SnapshotPrecisionPreferenceKey.self, value: precision)
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.preference(key: SnapshotPerceptualPrecisionPreferenceKey.self, value: perceptualPrecision)
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.preference(key: SnapshotFulfillmentPublisherPreferenceKey.self, value: FulfillmentPublisherEquatableWrapper(publisher: fulfillmentPublisher?.eraseToAnyPublisher()))
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}
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}
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