510 lines
23 KiB
Swift
510 lines
23 KiB
Swift
import AppKit
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import SwiftUI
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/// **The board popover's Theme tab** (03-board-ui.md § Board popover ▸ Theme tab, settled 2026-08-07)
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/// — reworked, same day, from the Background tab it replaces: a "Solid color" vs "Pattern" picker
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/// over one shared Tone/Saturation state, rather than a manual colour grid stacked over a
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/// generated-only picker.
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///
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/// ### No manual grid here
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///
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/// The `StyleEditorView` embed this tab carried at first — the palette grid, its own "Board"
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/// subtitle, the None well — is gone. Manual board styling stays reachable through **Style… ⌥⌘S**
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/// (`StyleEditorPopover`), the anchor every other target already uses; nothing is lost, and this tab
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/// no longer says "Board" about a surface that is, self-evidently, this board's own popover.
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///
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/// ### Solid color and Pattern share one filters struct
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///
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/// `BoardThemeFilters` carries all four axes — tone, hue strategy, mesh density, saturation — but
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/// Solid color only ever reads two of them (tone, saturation): a solid swatch is a `FacetsRecipe`'s
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/// `primaryColor` at the filters' own tone/saturation level, seed-independent by construction
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/// (`FacetsRecipe.primaryColor` never reads `seed`). Switching modes leaves tone and saturation
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/// exactly where they were — a picker that reset them on every mode flip would make "Pattern, then
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/// back to Solid" lose a choice nobody asked to undo.
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///
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/// ### One carousel, two fills
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///
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/// The eight-hue strip is one component in both modes: Pattern's swatches are the rendered mesh
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/// previews this tab has always shown (`FacetsGenerator.render`, 384px); Solid's are flat fills of
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/// the same eight hues, in the same wheel order, at the same tone/saturation. **Chevrons page it** —
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/// `chevron.compact.left`/`.right`, tall and narrow, flanking the scroll window — because eight
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/// swatches at this width run past the popover's edge and a strip with no other way to say "there is
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/// more here" than a fade nobody can click is not a discoverable one.
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///
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/// Every Pattern swatch previews the exact recipe a click would apply — same filters, same seed, only
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/// the pixel width differs (384 for the strip, 3072 for the file) — so "what's clicked is what lands"
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/// (`FacetsGenerator`'s own claim) still holds. A Solid swatch's claim is stronger still: there is no
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/// seed to differ on, so the swatch *is* the colour, exactly.
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// MARK: - Mode
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/// **Solid color vs Pattern** — the tab's top control (`BoardThemeTabView`). Raw values are the
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/// segmented picker's own labels, so this enum needs no separate label function the way the filter
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/// rows below do.
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enum BoardThemeMode: String, CaseIterable, Identifiable, Hashable {
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case solid = "Solid color"
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case pattern = "Pattern"
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var id: Self { self }
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}
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// MARK: - Filters
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/// **The Theme tab's filter state**, and the pure mapping from it (plus a hue and a seed) to a
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/// `FacetsRecipe` — pulled out of the view so the default-tone rule and the recipe assembly are each
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/// assertable without a popover on screen (`BoardThemeFiltersTests`).
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///
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/// Shared by both modes (`BoardThemeMode`): Solid color reads `tone` and `saturation` alone, Pattern
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/// reads all four. A mode switch never resets this struct — that is what keeps a chosen tone and
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/// saturation live across "Pattern, then Solid, then Pattern again".
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struct BoardThemeFilters: Equatable {
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var tone: FacetsRecipe.Tone
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var colors: FacetsRecipe.Strategy
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var mesh: FacetsRecipe.Density
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var saturation: FacetsRecipe.Saturation
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/// The picker's opening state: mono colours, medium mesh, mid saturation always — only tone
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/// follows the system, which is `defaultTone(colorScheme:)`'s own job.
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static func initial(colorScheme: ColorScheme) -> BoardThemeFilters {
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BoardThemeFilters(
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tone: defaultTone(colorScheme: colorScheme), colors: .mono, mesh: .medium, saturation: .mid
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)
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}
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/// Light appearance opens on Tone Light, dark on Tone Dark — read once, at first appearance, so a
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/// picker opened on a dark-mode Mac starts on swatches that read correctly against the popover
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/// around them rather than ones chosen for the other appearance. `.light` covers every
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/// `ColorScheme` case but `.dark` — there is no third case today.
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static func defaultTone(colorScheme: ColorScheme) -> FacetsRecipe.Tone {
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colorScheme == .dark ? .dark : .light
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}
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/// One hue's recipe under these filters and a given seed — the whole of "click a swatch, get a
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/// board". Pattern's clicks pass a minted seed; Solid's pass `0` and never look at it
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/// (`FacetsRecipe.primaryColor` is seed-independent).
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func recipe(hue: FacetsRecipe.Hue, seed: UInt64) -> FacetsRecipe {
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FacetsRecipe(hue: hue, strategy: colors, density: mesh, tone: tone, saturation: saturation, seed: seed)
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}
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}
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// MARK: - The tab
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struct BoardThemeTabView: View {
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let store: BoardStore
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/// The popover's own padding figure (`BoardInfoView.inset`), matching `BoardInfoTabView`'s own
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/// parameter — everything here pads by this amount instead of restating the derivation.
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let inset: CGFloat
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@Environment(\.colorScheme) private var colorScheme
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@Environment(\.colorSchemeContrast) private var contrast
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/// Solid color vs Pattern. Defaulted in `init`, not `onAppear`: unlike the tone default below,
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/// which needs the colour-scheme environment and so can only be read once the view is actually on
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/// screen, `store.snapshot` is already loaded the moment this view is built, so there is no reason
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/// to let the picker flash open on one mode and settle on another a frame later.
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@State private var mode: BoardThemeMode
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@State private var filters = BoardThemeFilters.initial(colorScheme: .light)
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/// One seed per hue, in wheel order — minted on appear and re-minted by Reroll. A filter change
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/// leaves these alone (same geometry, new treatment); Reroll is the one gesture that changes them
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/// (new geometry). Solid color never reads this — its swatches are seed-independent by
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/// construction — but the dictionary is still minted eagerly so Pattern has seeds ready the
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/// instant a user switches to it.
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@State private var seeds: [FacetsRecipe.Hue: UInt64] = [:]
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/// The carousel's Pattern previews, keyed by hue — absent until the render for the current
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/// `(filters, seeds)` pair lands, which is what the placeholder chip is for. Unused in Solid mode.
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@State private var previews: [FacetsRecipe.Hue: CGImage] = [:]
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/// Whether a Pattern swatch's 3072px render is in flight — every swatch disables and the header
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/// grows a small spinner for the duration, so a second click cannot race the first. Solid applies
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/// synchronously (there is no picture to render), so this never goes true for a Solid click.
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@State private var isApplying = false
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/// The carousel's paging position, in swatch indices — what the chevrons move and what disables
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/// them at either end of the eight-hue strip (`carousel`).
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@State private var scrollIndex = 0
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private var pointSize: CGFloat { CardWindowMetrics.bodyPointSize }
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private let swatchWidth: CGFloat = 96
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private var swatchHeight: CGFloat { (swatchWidth * 10 / 16).rounded() }
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private let swatchCornerRadius: CGFloat = 6
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/// The chevrons' own width — narrow enough to read as a paging control rather than a third
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/// swatch, per `chevron.compact`'s own "tall and skinny" form.
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private let chevronWidth: CGFloat = 15
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private var lastSwatchIndex: Int { FacetsRecipe.Hue.allCases.count - 1 }
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init(store: BoardStore, inset: CGFloat) {
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self.store = store
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self.inset = inset
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// The simplest honest default: a board whose image *is* this generator's own output opens on
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// Pattern, since that is the surface that made it; every other board — no image, or a
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// hand-placed one the app does not own — opens on Solid color, which is also the mode that
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// never overwrites a foreign picture by accident.
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_mode = State(initialValue: store.snapshot.backgroundImage.value == FacetsGenerator.fileName ? .pattern : .solid)
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}
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var body: some View {
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VStack(alignment: .leading, spacing: StyleEditorLayout.wellSpacing(bodyPointSize: pointSize)) {
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modePicker
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Grid(alignment: .leadingFirstTextBaseline, horizontalSpacing: 8, verticalSpacing: 6) {
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filterRow("Tone", selection: $filters.tone) { $0 == .light ? "Light" : "Dark" }
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if mode == .pattern {
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filterRow("Colors", selection: $filters.colors, label: colorsLabel)
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filterRow("Mesh", selection: $filters.mesh, label: meshLabel)
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}
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filterRow("Saturation", selection: $filters.saturation, label: saturationLabel)
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}
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carouselAccessories
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carousel
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}
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.padding(inset)
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.font(.callout)
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// The whole tab disables as one surface under the read-only lock — the same coarse rule
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// `StyleEditorView` applies to itself: an editor whose gestures would be refused should not
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// look available, and there is nothing here worth half-enabling.
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.disabled(!store.acceptsBoardMutations)
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.onAppear {
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filters.tone = BoardThemeFilters.defaultTone(colorScheme: colorScheme)
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if seeds.isEmpty { seeds = Self.mintSeeds() }
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}
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.task(id: previewKey) {
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await renderPreviews()
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}
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}
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// MARK: - Mode picker
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private var modePicker: some View {
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Picker("Theme", selection: $mode) {
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ForEach(BoardThemeMode.allCases) { value in
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Text(value.rawValue).tag(value)
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}
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}
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.pickerStyle(.segmented)
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.labelsHidden()
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}
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// MARK: - Filter rows
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/// One filter: a trailing-aligned label — matching the Info tab's row shape — beside a compact
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/// segmented picker. The label is hidden from VoiceOver; the picker's own title (identical text)
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/// is what it announces, so nothing is read twice.
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private func filterRow<Value>(
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_ title: String,
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selection: Binding<Value>,
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label: @escaping (Value) -> String
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) -> some View where Value: Hashable, Value: CaseIterable, Value.AllCases: RandomAccessCollection {
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GridRow {
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Text(title)
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.foregroundStyle(.secondary)
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.gridColumnAlignment(.trailing)
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.accessibilityHidden(true)
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Picker(title, selection: selection) {
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ForEach(Array(Value.allCases), id: \.self) { value in
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Text(label(value)).tag(value)
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}
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}
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.pickerStyle(.segmented)
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.labelsHidden()
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.controlSize(.small)
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}
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}
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private func colorsLabel(_ value: FacetsRecipe.Strategy) -> String {
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switch value {
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case .mono: "Mono"
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case .duo: "Duo"
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case .trio: "Trio"
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}
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}
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private func meshLabel(_ value: FacetsRecipe.Density) -> String {
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switch value {
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case .coarse: "Coarse"
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case .medium: "Medium"
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case .fine: "Fine"
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}
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}
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private func saturationLabel(_ value: FacetsRecipe.Saturation) -> String {
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switch value {
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case .soft: "Soft"
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case .mid: "Mid"
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case .rich: "Rich"
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}
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}
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// MARK: - Carousel accessories
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/// The spinner and the Reroll button — Reroll only matters in Pattern mode (Solid color has no
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/// geometry to reroll), so it is hidden rather than disabled in Solid mode, on the same "nothing
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/// here worth half-enabling" reasoning the tab's own `.disabled` applies.
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private var carouselAccessories: some View {
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HStack(spacing: 6) {
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Spacer()
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if isApplying {
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ProgressView()
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.controlSize(.small)
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.accessibilityLabel("Applying")
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}
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if mode == .pattern {
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Button {
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reroll()
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} label: {
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Image(systemName: "arrow.clockwise")
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}
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.buttonStyle(.borderless)
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.accessibilityLabel("New variations")
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}
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}
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}
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// MARK: - Carousel
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/// The eight-hue strip, flanked by paging chevrons — one component for both modes
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/// (`swatchFace(_:)` is the only thing that reads `mode`).
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///
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/// **Chevrons page by index, not by offset.** `scrollIndex` names the swatch nearest the leading
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/// edge; a press moves it three hues (roughly three swatch widths, since consecutive swatches are
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/// laid out one `swatchWidth + spacing` apart) and clamps at either end of the wheel, which is
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/// also what disables a chevron that has nothing left to reveal. `ScrollViewProxy.scrollTo` — not
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/// the newer `scrollPosition(id:)` binding — because a proxy scroll is a one-shot "go there" the
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/// tracked index already drives, while the binding form exists to *report back* which item is
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/// visible, a question this carousel never asks.
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private var carousel: some View {
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ScrollViewReader { proxy in
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HStack(spacing: StyleEditorLayout.wellSpacing(bodyPointSize: pointSize)) {
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chevron(
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systemName: "chevron.compact.left",
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accessibilityLabel: "Earlier hues",
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isDisabled: scrollIndex <= 0
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) { page(by: -3, proxy: proxy) }
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ScrollView(.horizontal, showsIndicators: false) {
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HStack(spacing: StyleEditorLayout.wellSpacing(bodyPointSize: pointSize)) {
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ForEach(Array(FacetsRecipe.Hue.allCases.enumerated()), id: \.offset) { index, hue in
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swatch(hue)
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.id(index)
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}
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}
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}
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chevron(
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systemName: "chevron.compact.right",
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accessibilityLabel: "Later hues",
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isDisabled: scrollIndex >= lastSwatchIndex
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) { page(by: 3, proxy: proxy) }
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}
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}
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}
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/// One paging button — tall and narrow, full swatch height, vertically centered beside the scroll
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/// window. `chevron.compact.left`/`.right` are SF Symbols' own tall-skinny variants, so no custom
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/// shape is needed to get the form the design asks for.
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private func chevron(
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systemName: String,
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accessibilityLabel: String,
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isDisabled: Bool,
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action: @escaping () -> Void
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) -> some View {
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Button(action: action) {
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Image(systemName: systemName)
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.frame(width: chevronWidth, height: swatchHeight)
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.contentShape(Rectangle())
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}
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.buttonStyle(.borderless)
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.disabled(isDisabled)
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.help(accessibilityLabel)
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.accessibilityLabel(accessibilityLabel)
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}
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/// Moves `scrollIndex` by `delta`, clamped to the strip's ends, and animates the scroll view to
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/// the swatch that lands on — a no-op past either end, which is what the chevron's own `disabled`
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/// state already promises but costs nothing to restate here.
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private func page(by delta: Int, proxy: ScrollViewProxy) {
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let newIndex = min(max(scrollIndex + delta, 0), lastSwatchIndex)
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guard newIndex != scrollIndex else { return }
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scrollIndex = newIndex
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withAnimation {
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proxy.scrollTo(newIndex, anchor: .leading)
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}
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}
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private func swatch(_ hue: FacetsRecipe.Hue) -> some View {
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Button {
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apply(hue)
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} label: {
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swatchFace(hue)
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}
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.buttonStyle(.plain)
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// Layered on top of the tab's own disabling: this half additionally freezes every swatch for
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// the one Pattern render already running, so a second click cannot race the first's write.
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// Always `false` in Solid mode, where nothing is ever in flight.
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.disabled(isApplying)
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.opacity(isApplying ? 0.6 : 1)
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.help(hue.displayName)
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.accessibilityLabel(accessibilityLabel(for: hue))
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}
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private func accessibilityLabel(for hue: FacetsRecipe.Hue) -> String {
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switch mode {
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case .solid: "\(hue.displayName) — set solid background"
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case .pattern: "\(hue.displayName) — set generated background"
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}
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}
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@ViewBuilder
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private func swatchFace(_ hue: FacetsRecipe.Hue) -> some View {
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Group {
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switch mode {
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case .solid:
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solidColor(hue)
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case .pattern:
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if let image = previews[hue] {
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Image(decorative: image, scale: 1)
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.resizable()
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.aspectRatio(contentMode: .fill)
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} else {
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// The pending placeholder: the recipe's own primary colour, so the strip reads as
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// "still painting this picture" rather than as a hole — and is already the right
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// colour if the render never manages to beat a quick reroll.
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chip(hue)
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}
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}
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}
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.frame(width: swatchWidth, height: swatchHeight)
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.clipShape(RoundedRectangle(cornerRadius: swatchCornerRadius))
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.overlay(
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RoundedRectangle(cornerRadius: swatchCornerRadius)
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.strokeBorder(.separator, lineWidth: Accommodations.borderWidth(1, contrast: contrast))
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)
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}
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/// A Solid color swatch's fill — the filters' own tone/saturation level at this hue, seed `0` and
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/// seed-independent (`FacetsRecipe.primaryColor` never reads it): the same colour every time, for
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/// the same filters and hue, which is the whole of what makes a flat swatch honest about what
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/// clicking it applies.
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private func solidColor(_ hue: FacetsRecipe.Hue) -> Color {
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let components = filters.recipe(hue: hue, seed: 0).primaryColor.components
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return Color(red: components.red, green: components.green, blue: components.blue)
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}
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private func chip(_ hue: FacetsRecipe.Hue) -> Color {
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guard let seed = seeds[hue] else { return Color(nsColor: .textBackgroundColor) }
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let components = filters.recipe(hue: hue, seed: seed).primaryColor.components
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return Color(red: components.red, green: components.green, blue: components.blue)
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}
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// MARK: - Rendering and applying
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private struct PreviewKey: Equatable {
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var filters: BoardThemeFilters
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var seeds: [FacetsRecipe.Hue: UInt64]
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}
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private var previewKey: PreviewKey { PreviewKey(filters: filters, seeds: seeds) }
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/// The strip's eight Pattern previews, off the main actor — `FacetsGenerator.render` is pure, so
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/// this is exactly the render `applyPattern(_:)` below would do at 3072px, just smaller and for
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/// every hue at once. Re-runs whenever `previewKey` changes (`.task(id:)`), which a filter edit or
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/// a Reroll both do — the same detach-and-await shape `BoardInfoTabView`'s disk walk uses.
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///
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/// Runs regardless of `mode`: tone and saturation are shared, so a filter edited while Solid color
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/// is showing still has to leave Pattern's previews correct for the instant the user switches back
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/// to it, and eight 384px renders are cheap enough that gating them on the visible mode would save
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/// little for the complexity it would cost.
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private func renderPreviews() async {
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previews = [:]
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let filters = self.filters
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let seeds = self.seeds
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let rendered = await Task.detached(priority: .utility) { () -> [FacetsRecipe.Hue: CGImage] in
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var rendered: [FacetsRecipe.Hue: CGImage] = [:]
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for hue in FacetsRecipe.Hue.allCases {
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guard let seed = seeds[hue] else { continue }
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if let image = FacetsGenerator.render(recipe: filters.recipe(hue: hue, seed: seed), pixelWidth: 384) {
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rendered[hue] = image
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}
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}
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return rendered
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}.value
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// `.task(id:)` cancels this task when the key moves on, but cancellation is cooperative and
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// the detached render finishes regardless — without this gate a slow stale strip could land
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// *after* the newer key's own renders and quietly replace them.
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guard !Task.isCancelled else { return }
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previews = rendered
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}
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/// A swatch, clicked — Solid color writes a colour and clears the image subkey synchronously;
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/// Pattern renders and writes a picture off the main actor, exactly as this tab always has.
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private func apply(_ hue: FacetsRecipe.Hue) {
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|
switch mode {
|
|
case .solid:
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|
applySolid(hue)
|
|
case .pattern:
|
|
applyPattern(hue)
|
|
}
|
|
}
|
|
|
|
/// The Solid color half: no render, no detour off the main actor — just the colour this hue's
|
|
/// level names, through the one gesture every solid background lands through
|
|
/// (`BoardStore.applySolidBackground`). A refused write under the lock leaves the board exactly as
|
|
/// it was; the write path's own banners cover that half.
|
|
private func applySolid(_ hue: FacetsRecipe.Hue) {
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|
let colorHex = filters.recipe(hue: hue, seed: 0).primaryColorHex
|
|
_ = store.applySolidBackground(colorHex: colorHex)
|
|
}
|
|
|
|
/// The Pattern half: the same recipe the preview showed, rendered at the file's own width and
|
|
/// written through the one gesture every generated background lands through
|
|
/// (`BoardStore.applyGeneratedBackground`). Failures — a `nil` render, a refused write under the
|
|
/// lock — leave the board exactly as it was; the write path's own banners cover the write half.
|
|
private func applyPattern(_ hue: FacetsRecipe.Hue) {
|
|
guard let seed = seeds[hue] else { return }
|
|
let recipe = filters.recipe(hue: hue, seed: seed)
|
|
isApplying = true
|
|
Task {
|
|
let data = await Task.detached(priority: .userInitiated) {
|
|
FacetsGenerator.pngData(recipe: recipe, pixelWidth: 3072)
|
|
}.value
|
|
if let data {
|
|
_ = store.applyGeneratedBackground(png: data, colorHex: recipe.primaryColorHex)
|
|
}
|
|
isApplying = false
|
|
}
|
|
}
|
|
|
|
private static func mintSeeds() -> [FacetsRecipe.Hue: UInt64] {
|
|
Dictionary(uniqueKeysWithValues: FacetsRecipe.Hue.allCases.map { ($0, UInt64.random(in: UInt64.min...UInt64.max)) })
|
|
}
|
|
|
|
private func reroll() {
|
|
seeds = Self.mintSeeds()
|
|
}
|
|
}
|
|
|
|
// MARK: - Hue display names
|
|
|
|
private extension FacetsRecipe.Hue {
|
|
/// The wheel's own names, capitalized for the carousel's `.help` and accessibility label — the
|
|
/// same eight words 03-board-ui.md's faceted-gallery notes use.
|
|
var displayName: String {
|
|
switch self {
|
|
case .clay: "Clay"
|
|
case .amber: "Amber"
|
|
case .olive: "Olive"
|
|
case .forest: "Forest"
|
|
case .teal: "Teal"
|
|
case .sky: "Sky"
|
|
case .iris: "Iris"
|
|
case .rose: "Rose"
|
|
}
|
|
}
|
|
}
|