35 lines
996 B
Swift
35 lines
996 B
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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struct ContentVisibilityTrackingModifier<ID: Hashable>: ViewModifier {
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@EnvironmentObject var visibilityTracker: VisibilityTracker<ID>
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let id: ID
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func body(content: Content) -> some View {
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content
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.id(id)
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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.reportContentBounds(proxy.frame(in: .global), id: id)
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return Color.clear
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}
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}
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public extension View {
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func trackVisibility<ID: Hashable>(id: ID) -> some View {
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self
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.modifier(ContentVisibilityTrackingModifier(id: id))
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}
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}
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