Contact sheet

pnpm add cn

/*
 * Bevel foundation. Every component builds on these tokens and utilities;
 * component stylesheets only add their own palettes and shapes.
 *
 * Layers:
 *   1. Light     one source, above and slightly in front of the screen.
 *   2. Depth     named elevations built from the light: recessed, flush,
 *                raised, pressed, object.
 *   3. Material  a surface recipe (leather, plastic, metal) that reads
 *                --bevel-material and --bevel-material-edge.
 *   4. Motion    two curves, a spring, and durations named by purpose.
 *   5. Shape     radii, stitching, and the type scale for amounts.
 */

:root {
  /* 1. Light */
  --bevel-highlight: oklch(1 0 0 / 0.22);
  --bevel-highlight-strong: oklch(1 0 0 / 0.35);
  --bevel-shade: oklch(0 0 0 / 0.32);
  --bevel-shade-strong: oklch(0 0 0 / 0.5);
  --bevel-cast: oklch(0.25 0.03 50 / 0.22);
  /* Stamped into a surface: shaded on the upper inner edge, lit below. */
  --bevel-deboss: 0 -1px 0 oklch(0 0 0 / 0.45), 0 1px 0 oklch(1 0 0 / 0.12);

  /* 3. Material defaults; components and variants override these. */
  --bevel-material: oklch(0.47 0.085 52);
  --bevel-material-edge: oklch(0.3 0.06 44);
  --bevel-material-recess: oklch(0.2 0.008 260); /* neutral dark; materials set their own */
  --bevel-grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.7' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .7 0 0 0 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)'/%3E%3C/svg%3E");
  --bevel-grain-size: 180px;

  /* 2. Depth */
  --bevel-depth-recessed:
    inset 0 1px 2px var(--bevel-shade-strong),
    0 1px 0 var(--bevel-highlight);
  --bevel-depth-flush:
    inset 0 1px 0 var(--bevel-highlight),
    inset 0 -1px 0 var(--bevel-shade);
  --bevel-depth-raised:
    inset 0 1px 0 var(--bevel-highlight),
    0 1px 0 var(--bevel-material-edge),
    0 2px 0 var(--bevel-material-edge),
    0 3px 5px var(--bevel-shade);
  --bevel-depth-pressed:
    inset 0 1px 2px var(--bevel-shade),
    0 1px 0 var(--bevel-highlight);
  /* A whole object resting on the page. */
  --bevel-depth-object:
    inset 0 1px 0 var(--bevel-highlight),
    inset 0 -1px 0 var(--bevel-shade),
    0 0 0 1px var(--bevel-material-edge),
    0 1px 1px var(--bevel-cast),
    0 6px 12px -2px var(--bevel-cast),
    0 18px 32px -8px var(--bevel-cast);
  /* The shadow under a loose object, for filter: drop-shadow(). */
  --bevel-depth-cast-sm: 0 4px 6px var(--bevel-cast);
  /* A thin object (a card) lying on another surface. */
  --bevel-depth-sheet:
    inset 0 1px 0 var(--bevel-highlight-strong),
    inset 0 0 0 1px oklch(0 0 0 / 0.12),
    0 -1px 2px oklch(0 0 0 / 0.18);

  /* 4. Motion */
  --bevel-ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --bevel-ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  /* Underdamped spring, ~8% overshoot. Pure CSS; pair with --bevel-duration-move or longer. */
  --bevel-ease-spring: linear(0, 0.06, 0.202, 0.38, 0.561, 0.723, 0.856, 0.955, 1.023, 1.062, 1.081, 1.083, 1.075, 1.062, 1.047, 1.032, 1.019, 1.009, 1.002, 0.997, 0.994, 0.993, 0.993, 0.994, 1);
  --bevel-duration-press: 100ms; /* a control giving under a finger */
  --bevel-duration-small: 200ms; /* hover lifts, tabs, small state changes */
  --bevel-duration-move: 300ms; /* objects moving: cards, drawers */
  --bevel-duration-ambient: 520ms; /* whole-scene changes: lighting */
  --bevel-stagger: 30ms;
  --bevel-lift: 3px; /* how far an object rises on hover */
  --bevel-perspective: 30rem; /* viewing distance for parts that turn in 3D (covers, flaps) */
  /* Unchosen items in a group sit back in shadow. */
  --bevel-dim: 0.82;

  /* 5. Shape */
  --bevel-radius-xs: 0.25rem;
  --bevel-radius-sm: 0.5rem;
  --bevel-radius-md: 0.625rem;
  --bevel-radius-lg: 1rem;
  --bevel-radius-xl: 1.5rem;
  --bevel-stitch-width: 1.5px;
  --bevel-stitch-inset: 0.375rem;
  /* Amounts: the figure, its secondary parts (currency, cents), labels, fine print. */
  --bevel-amount: 2.25rem;
  --bevel-amount-minor: 1.25rem;
  --bevel-label: 0.75rem;
  --bevel-fine: 0.6875rem;
  --bevel-tracking-label: 0.08em; /* stamped labels */
  --bevel-tracking-print: 0.06em; /* printed marks on cards */

  /* Paper and ink */
  --bevel-paper: oklch(0.975 0.008 85);
  --bevel-paper-foreground: oklch(0.28 0.02 260);
  --bevel-paper-muted: oklch(0.48 0.015 260);
  --bevel-paper-rule: oklch(0.78 0.04 240 / 0.45);
  --bevel-paper-margin: oklch(0.68 0.14 25 / 0.45);
  --bevel-fibre: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='f'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9 .35' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .18 0 0 0 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23f)'/%3E%3C/svg%3E");
  /* Ink soaks unevenly: mostly solid with pale specks. Used as a mask. */
  --bevel-ink-texture: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='i'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -2.4 0 0 0 2.1'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23i)'/%3E%3C/svg%3E");
  --bevel-ink-red: oklch(0.52 0.19 27);
  --bevel-ink-blue: oklch(0.44 0.14 262);
  --bevel-ink-green: oklch(0.5 0.12 155);
  --bevel-ink-black: oklch(0.3 0.01 260);
  --bevel-ink-amber: oklch(0.55 0.13 65);

  /* Brass and ivory: instrument hardware and dial faces */
  --bevel-brass: oklch(0.76 0.11 82);
  --bevel-brass-edge: oklch(0.52 0.08 70);
  --bevel-ivory: oklch(0.95 0.025 90);
  --bevel-ivory-foreground: oklch(0.25 0.015 60);
  --bevel-needle: oklch(0.55 0.2 27);

  /* Desk stationery: legal pads, pens, pencils, exhibit stickers */
  --bevel-pad: oklch(0.95 0.075 98); /* yellow legal pad */
  --bevel-pad-foreground: oklch(0.27 0.03 255);
  --bevel-pad-rule: oklch(0.72 0.06 235 / 0.45);
  --bevel-pad-margin: oklch(0.62 0.16 25 / 0.55);
  --bevel-pen-red: oklch(0.52 0.2 27); /* correcting pen */
  --bevel-pen-blue: oklch(0.42 0.15 262); /* writing pen */
  --bevel-pencil: oklch(0.55 0.01 260); /* not written in ink yet */
  --bevel-sticker: oklch(0.9 0.12 95); /* exhibit sticker */
  --bevel-sticker-foreground: oklch(0.26 0.03 70);
  /* Handwriting. Bring a marker font (e.g. Permanent Marker) for the full effect; these are fallbacks. */
  --bevel-font-marker: "Permanent Marker", "Marker Felt", "Chalkboard SE", ui-rounded, "Arial Rounded MT Bold", system-ui, sans-serif;
}

.dark {
  --bevel-highlight: oklch(1 0 0 / 0.14);
  /* Paper under dim light, not inverted: it's still paper. */
  --bevel-paper: oklch(0.88 0.008 85);
  --bevel-ivory: oklch(0.86 0.022 90);
  --bevel-pad: oklch(0.86 0.07 98);
  --bevel-cast: oklch(0 0 0 / 0.55);
}

/* Depth */
@utility bevel-recessed {
  background-color: var(--bevel-material-recess);
  box-shadow: var(--bevel-depth-recessed);
}
@utility bevel-flush {
  box-shadow: var(--bevel-depth-flush);
}
@utility bevel-raised {
  background-color: color-mix(in oklch, var(--bevel-material), white 7%);
  background-image: linear-gradient(to bottom, var(--bevel-highlight), transparent 60%);
  box-shadow: var(--bevel-depth-raised);
}
@utility bevel-pressed {
  background-color: color-mix(in oklch, var(--bevel-material), black 4%);
  background-image: none;
  box-shadow: var(--bevel-depth-pressed);
}
@utility bevel-object {
  box-shadow: var(--bevel-depth-object);
}

/* Materials */
@utility bevel-leather {
  background-color: var(--bevel-material);
  background-image:
    var(--bevel-grain),
    linear-gradient(to bottom, var(--bevel-highlight), transparent 28%, transparent 72%, var(--bevel-shade));
  background-size: var(--bevel-grain-size) var(--bevel-grain-size), 100% 100%;
  background-blend-mode: soft-light, normal;
}
@utility bevel-plastic {
  background-color: var(--bevel-material);
  background-image:
    linear-gradient(115deg, var(--bevel-highlight-strong), transparent 40%),
    linear-gradient(to bottom, transparent 25%, oklch(0 0 0 / 0.45));
  box-shadow: var(--bevel-depth-sheet);
}
@utility bevel-metal {
  background-color: var(--bevel-material);
  background-image:
    linear-gradient(to bottom, var(--bevel-highlight-strong), transparent 45%, var(--bevel-shade) 100%),
    repeating-linear-gradient(90deg, oklch(1 0 0 / 0.06) 0 1px, transparent 1px 3px);
  box-shadow:
    inset 0 0 0 1px oklch(0 0 0 / 0.25),
    inset 0 1px 0 var(--bevel-highlight-strong);
}

/* Details */
@utility bevel-deboss {
  text-shadow: var(--bevel-deboss);
}
@utility bevel-stitch {
  border-color: var(--bevel-stitch, oklch(0.88 0.05 82 / 0.8));
  border-style: dashed;
  border-width: var(--bevel-stitch-width);
  filter: drop-shadow(0 1px 0 var(--bevel-shade));
}
/* A lit fill sitting in a recess (meters, progress). Colour from --bevel-fill. */
@utility bevel-fill {
  background-color: var(--bevel-fill);
  background-image: linear-gradient(to bottom, oklch(1 0 0 / 0.55), transparent 55%, oklch(0 0 0 / 0.18));
  box-shadow: 0 0 6px -1px var(--bevel-fill);
}
/* A small indicator light. Colour from --bevel-led. */
@utility bevel-led {
  background-color: var(--bevel-led);
  background-image: radial-gradient(circle at 35% 30%, oklch(1 0 0 / 0.85), transparent 45%);
  box-shadow:
    0 0 6px var(--bevel-led),
    inset 0 -1px 1px oklch(0 0 0 / 0.35),
    0 1px 0 var(--bevel-highlight);
}

/* Paper: a sheet resting on the surface, with fibre in it. */
@utility bevel-paper {
  background-color: var(--bevel-paper);
  background-image: var(--bevel-fibre);
  background-size: 240px 240px;
  color: var(--bevel-paper-foreground);
  box-shadow:
    0 1px 1px var(--bevel-cast),
    0 6px 14px -4px var(--bevel-cast);
}
/* Ink on paper: multiplies into the surface and soaks unevenly. Colour from --bevel-ink. */
@utility bevel-ink {
  color: var(--bevel-ink, var(--bevel-ink-red));
  border-color: currentColor;
  mix-blend-mode: multiply;
  mask-image: var(--bevel-ink-texture);
  mask-size: 160px 160px;
}
/* Glass over an instrument window: one reflection from the light above. Put on an overlay element. */
@utility bevel-glass {
  pointer-events: none;
  background-image: linear-gradient(165deg, var(--bevel-highlight-strong) 0%, transparent 38%, transparent 70%, var(--bevel-shade) 100%);
}

/* Material families: one per screen. Set on the screen's container. */
[data-bevel-family="leather"] {
  --bevel-cast: oklch(0.25 0.03 50 / 0.22);
}
[data-bevel-family="paper"] {
  --bevel-cast: oklch(0.3 0.01 250 / 0.16);
}
.dark :is([data-bevel-family="leather"], [data-bevel-family="paper"]) {
  --bevel-cast: oklch(0 0 0 / 0.55);
}

/*
 * Ruled paper: rules every --bevel-rule-height and a margin line at
 * --bevel-rule-margin. Set --bevel-sheet for the paper colour. The ruling
 * scrolls with the content.
 */
@utility bevel-ruled {
  background-color: var(--bevel-sheet, var(--bevel-paper));
  background-image:
    linear-gradient(
      to right,
      transparent calc(var(--bevel-rule-margin) - 1px),
      var(--bevel-sheet-margin, var(--bevel-paper-margin)) calc(var(--bevel-rule-margin) - 1px) calc(var(--bevel-rule-margin) + 1px),
      transparent calc(var(--bevel-rule-margin) + 1px)
    ),
    repeating-linear-gradient(
      to bottom,
      transparent 0 calc(var(--bevel-rule-height) - 1px),
      var(--bevel-sheet-rule, var(--bevel-paper-rule)) calc(var(--bevel-rule-height) - 1px) var(--bevel-rule-height)
    ),
    var(--bevel-fibre);
  background-size: 100% 100%, 100% 100%, 240px 240px;
  background-attachment: local;
  color: var(--bevel-paper-foreground);
  box-shadow:
    0 1px 1px var(--bevel-cast),
    0 6px 14px -4px var(--bevel-cast);
}

"use client"

import * as React from "react"
import { cn } from "cn"

type Mark = "pick" | "reject"

type ContactSheetContextValue = {
  ids: string[]
  register: (id: string) => () => void
  marks: Record<string, Mark>
  setMark: (id: string, mark: Mark | null) => void
  focused: string | undefined
  setFocused: (id: string) => void
  move: (from: string, key: string) => void
}

const ContactSheetContext = React.createContext<ContactSheetContextValue | null>(null)

function useContactSheet() {
  const context = React.useContext(ContactSheetContext)
  if (!context) throw new Error("ContactSheet parts must be inside <ContactSheet>")
  return context
}

type ContactSheetProps = Omit<React.ComponentProps<"div">, "defaultValue"> & {
  /** Marks by frame id. Unmarked frames are left out. */
  value?: Record<string, Mark>
  defaultValue?: Record<string, Mark>
  onValueChange?: (value: Record<string, Mark>) => void
  /** Frames per row. Arrow keys move by row with it. */
  columns?: number
}

/**
 * A contact sheet: every frame at once, marked with a grease pencil.
 * Circle the keepers, cross out the rest. Arrow keys move between frames;
 * P picks, X rejects, Backspace clears, Enter cycles. Give it an aria-label.
 */
function ContactSheet({
  className,
  value,
  defaultValue = {},
  onValueChange,
  columns = 4,
  style,
  children,
  ...props
}: ContactSheetProps) {
  const [ids, setIds] = React.useState<string[]>([])
  const [uncontrolled, setUncontrolled] = React.useState(defaultValue)
  const [focused, setFocused] = React.useState<string>()
  const marks = value ?? uncontrolled
  const frames = React.useRef<HTMLDivElement>(null)

  const register = React.useCallback((id: string) => {
    setIds((all) => (all.includes(id) ? all : [...all, id]))
    return () => setIds((all) => all.filter((x) => x !== id))
  }, [])
  const setMark = React.useCallback(
    (id: string, mark: Mark | null) => {
      const next = { ...marks }
      if (mark) next[id] = mark
      else delete next[id]
      setUncontrolled(next)
      onValueChange?.(next)
    },
    [marks, onValueChange]
  )
  const move = React.useCallback(
    (from: string, key: string) => {
      const i = ids.indexOf(from)
      const steps: Record<string, number> = { ArrowRight: 1, ArrowLeft: -1, ArrowDown: columns, ArrowUp: -columns }
      const to = key === "Home" ? 0 : key === "End" ? ids.length - 1 : i + (steps[key] ?? 0)
      const id = ids[to]
      if (to < 0 || !id) return
      setFocused(id)
      frames.current?.querySelector<HTMLElement>(`[data-frame-id="${CSS.escape(id)}"]`)?.focus()
    },
    [ids, columns]
  )

  const context = React.useMemo(
    () => ({ ids, register, marks, setMark, focused: focused ?? ids[0], setFocused, move }),
    [ids, register, marks, setMark, focused, move]
  )
  const picked = Object.values(marks).filter((m) => m === "pick").length
  return (
    <ContactSheetContext value={context}>
      <div
        role="group"
        data-slot="contact-sheet"
        className={cn("bevel-paper flex w-full flex-col gap-2 rounded-(--bevel-radius-xs) p-3", className)}
        style={{ "--contact-sheet-columns": columns, ...style } as React.CSSProperties}
        {...props}
      >
        <div
          ref={frames}
          className="grid grid-cols-[repeat(var(--contact-sheet-columns),minmax(0,1fr))] gap-y-2 bg-(--contact-sheet-film) px-1 py-4 shadow-(--bevel-depth-sheet)"
        >
          {children}
        </div>
        <p role="status" className="text-xs text-(--bevel-paper-muted)">
          {picked} picked of {ids.length}
        </p>
      </div>
    </ContactSheetContext>
  )
}

type ContactSheetFrameProps = Omit<React.ComponentProps<"button">, "id"> & {
  id: string
  /** What's in the frame, for its name: “Dunes at dusk”. */
  label: string
}

/** One frame. Its picture is the children. */
function ContactSheetFrame({ className, id, label, children, onKeyDown, onFocus, ...props }: ContactSheetFrameProps) {
  const { ids, register, marks, setMark, focused, setFocused, move } = useContactSheet()
  React.useEffect(() => register(id), [id, register])
  const mark = marks[id]
  const number = ids.indexOf(id) + 1
  const cycle: Record<string, Mark | null> = { none: "pick", pick: "reject", reject: null }
  return (
    <button
      type="button"
      data-slot="contact-sheet-frame"
      data-frame-id={id}
      data-mark={mark}
      tabIndex={focused === id ? 0 : -1}
      aria-keyshortcuts="P X Backspace"
      onFocus={(event) => {
        onFocus?.(event)
        setFocused(id)
      }}
      onClick={() => setMark(id, cycle[mark ?? "none"]!)}
      onKeyDown={(event) => {
        onKeyDown?.(event)
        const key = event.key.toLowerCase()
        if (key === "p") setMark(id, mark === "pick" ? null : "pick")
        else if (key === "x") setMark(id, mark === "reject" ? null : "reject")
        else if (event.key === "Backspace" || event.key === "Delete") setMark(id, null)
        else if (["ArrowRight", "ArrowLeft", "ArrowUp", "ArrowDown", "Home", "End"].includes(event.key)) move(id, event.key)
        else return
        event.preventDefault()
      }}
      className={cn(
        "group/frame relative flex flex-col gap-1 px-1 text-left outline-none",
        "focus-visible:ring-2 focus-visible:ring-(--contact-sheet-sprocket)",
        className
      )}
      {...props}
    >
      {/* Sprocket holes above and below, as on 35mm film. */}
      <span aria-hidden className="absolute inset-x-1 -top-3 flex justify-around">
        {Array.from({ length: 4 }, (_, i) => (
          <span key={i} className="h-1.5 w-1 rounded-(--bevel-radius-xs) bg-(--contact-sheet-sprocket) opacity-80" />
        ))}
      </span>
      <span className="relative block aspect-[3/2] overflow-hidden bg-(--bevel-shade-strong) transition-opacity duration-(--bevel-duration-small) group-data-[mark=reject]/frame:opacity-45 motion-reduce:transition-none">
        {children}
      </span>
      {/* The edge-printed frame number starts the name: “3. Dusk, low sun, picked”. */}
      <span aria-hidden className="font-mono text-(length:--bevel-fine) text-(--contact-sheet-edge-print)">
        {number}
      </span>
      <span className="sr-only">
        {`${number}. ${label}${mark === "pick" ? ", picked" : mark === "reject" ? ", rejected" : ""}`}
      </span>
      {/* Grease pencil: a loose circle to keep, a cross to drop. */}
      <svg
        aria-hidden
        viewBox="0 0 100 70"
        preserveAspectRatio="none"
        className="pointer-events-none absolute inset-x-0 -top-1 aspect-[3/2] w-full overflow-visible"
      >
        <path
          d="M14 38 C10 14 40 4 62 7 C88 10 96 30 88 50 C80 66 40 70 22 60 C10 53 8 40 18 30"
          fill="none"
          stroke="var(--contact-sheet-pick)"
          strokeWidth="4"
          strokeLinecap="round"
          className="origin-center scale-90 opacity-0 transition-[opacity,scale] duration-(--bevel-duration-small) ease-(--bevel-ease-out) group-data-[mark=pick]/frame:scale-100 group-data-[mark=pick]/frame:opacity-100 motion-reduce:transition-none"
        />
        <path
          d="M18 12 L84 60 M82 10 L20 62"
          fill="none"
          stroke="var(--contact-sheet-reject)"
          strokeWidth="4"
          strokeLinecap="round"
          className="origin-center scale-90 opacity-0 transition-[opacity,scale] duration-(--bevel-duration-small) ease-(--bevel-ease-out) group-data-[mark=reject]/frame:scale-100 group-data-[mark=reject]/frame:opacity-90 motion-reduce:transition-none"
        />
      </svg>
    </button>
  )
}

export { ContactSheet, ContactSheetFrame }
export type { ContactSheetProps, ContactSheetFrameProps }

/*
 * Contact sheet: a strip of film printed frame by frame, marked up with a
 * grease pencil: circled to keep, crossed out to drop.
 * Builds on bevel.css (paper, motion).
 */

:root {
  --contact-sheet-film: oklch(0.17 0.01 60);
  --contact-sheet-edge-print: oklch(0.72 0.12 70); /* the orange edge printing */
  --contact-sheet-sprocket: oklch(0.93 0.01 90);
  --contact-sheet-pick: oklch(0.6 0.22 27); /* red grease pencil */
  --contact-sheet-reject: oklch(0.96 0.01 90); /* white grease pencil */
  --contact-sheet-columns: 4;
}

[data-slot="contact-sheet-frame"] {
  --bevel-ink: var(--contact-sheet-pick);
}

@import "./bevel.css";
@import "./contact-sheet.css";