36 lines
1.1 KiB
Swift
36 lines
1.1 KiB
Swift
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// -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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// Created by Sam Deane on 27/07/22.
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// All code (c) 2022 - present day, Elegant Chaos Limited.
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// -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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import SwiftUI
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public struct VisibilityTrackingScrollView<Content, ID>: View where Content: View, ID: Hashable {
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@ViewBuilder let content: Content
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@State var visibilityTracker: VisibilityTracker<ID>
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public init(action: @escaping VisibilityTracker<ID>.Action, @ViewBuilder content: () -> Content) {
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self.content = content()
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self._visibilityTracker = .init(initialValue: VisibilityTracker<ID>(action: action))
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}
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public var body: some View {
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ScrollView {
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content
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.environmentObject(visibilityTracker)
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}
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.background(
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GeometryReader { proxy in
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report(proxy: proxy)
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}
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)
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}
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func report(proxy: GeometryProxy) -> Color {
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visibilityTracker.reportContainerBounds(proxy.frame(in: .global))
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return Color.clear
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}
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}
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