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punktfunk/clients/apple/Sources/PunktfunkClient/AcknowledgementsView.swift
T
enricobuehler 372b27540b
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fix(apple): render Acknowledgements notices in lazy chunks
THIRD-PARTY-NOTICES.txt is ~885 KB / 16k lines; rendering it in a single
SwiftUI Text overshot the text-rendering height limit — it laid out for ages
and drew blank below the cutoff (only the small punktfunk licenses above it
showed). Split the notices into ~80 line-chunks (<=200 lines / <=18 KB each,
computed once as Licenses.thirdPartyNoticesChunks) and render them in a
top-level LazyVStack so only on-screen chunks lay out and no chunk is tall
enough to clip. Chunking is lossless — rejoining the chunks reproduces the
original byte-for-byte, so no notice text is dropped.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-29 12:34:19 +02:00

73 lines
2.9 KiB
Swift

import PunktfunkKit
import SwiftUI
/// Open-source acknowledgements: punktfunk's own license (MIT OR Apache-2.0) followed by the
/// third-party software notices. Used as a pushed view on iOS/tvOS and a preferences tab on macOS.
struct AcknowledgementsView: View {
private var version: String? {
Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String
}
var body: some View {
ScrollView {
// Top-level LazyVStack so the third-party-notices chunks (Licenses.thirdPartyNoticesChunks,
// ~885 KB total) load lazily as they scroll into view a single Text that large overshoots
// the text-rendering height limit (blank below the limit + very slow). spacing 0 keeps the
// notice chunks visually continuous; the header block carries its own spacing + bottom pad.
LazyVStack(alignment: .leading, spacing: 0) {
VStack(alignment: .leading, spacing: 18) {
Text("punktfunk")
.font(.title2).bold()
if let version {
Text("Version \(version)")
.font(.caption)
.foregroundStyle(.secondary)
}
Text(Licenses.appLicense)
.font(.caption.monospaced())
.modifier(SelectableText())
Divider()
Text("Third-party software")
.font(.headline)
Text(
"punktfunk uses the open-source components below, each under its own license. "
+ "On some platforms FFmpeg is additionally bundled under the LGPL v2.1+ "
+ "(dynamically linked, replaceable)."
)
.font(.caption)
.foregroundStyle(.secondary)
}
.frame(maxWidth: .infinity, alignment: .leading)
.padding(.bottom, 18)
ForEach(Licenses.thirdPartyNoticesChunks.indices, id: \.self) { i in
Text(Licenses.thirdPartyNoticesChunks[i])
.font(.caption2.monospaced())
.frame(maxWidth: .infinity, alignment: .leading)
.modifier(SelectableText())
}
}
.frame(maxWidth: 900, alignment: .leading)
.frame(maxWidth: .infinity, alignment: .leading)
.padding()
#if os(tvOS)
.padding(40)
#endif
}
.navigationTitle("Acknowledgements")
}
}
/// `textSelection(.enabled)` is unavailable on tvOS, so apply it only where it exists.
private struct SelectableText: ViewModifier {
func body(content: Content) -> some View {
#if os(tvOS)
content
#else
content.textSelection(.enabled)
#endif
}
}