03지금 보는 자리를 알려 주는 미니맵

<main class="stage">
  <div class="mm is-demo" id="mm">
    <div class="mm__view" id="mm-view" tabindex="0" role="img" aria-label="확대한 설계 도면. 화살표 키로 보는 자리를 옮깁니다">
      <div class="mm__layer" id="mm-layer"></div>
      <div class="mm__map" id="mm-map" aria-hidden="true"><div class="mm__box" id="mm-box"></div></div>
    </div>
  </div>
</main>

@use "../../../../site/static/demo-tokens" as *;

$duration: $dur-base;
$easing: $ease-spring;
$color: $subject-cream;

@include stage($stage-yellow);

// 가짜 사진 — 파일 없이 그린 설계 도면. 확대하면 어디를 보고 있는지 잃어버리기 딱 좋은 그림
$plan:
  repeating-linear-gradient(0deg, rgba(255, 247, 230, .34) 0 .5%, transparent .5% 6%),
  repeating-linear-gradient(90deg, rgba(255, 247, 230, .34) 0 .5%, transparent .5% 8%),
  radial-gradient(circle at 78% 30%, $subject-pink 0 9%, transparent 10%),
  linear-gradient(48deg, transparent 0 38%, rgba($stage-yellow, .9) 38% 44%, transparent 44%),
  linear-gradient(200deg, $stage-ink 0%, $subject-blue 58%, $stage-ink 100%);

.mm { position: relative; }

.mm__view {
  position: relative;
  box-sizing: border-box;
  width: 288px;
  height: 160px;
  overflow: hidden;
  border-radius: $r-card;
  background: $stage-ink;
  box-shadow: $shadow-raised;
  cursor: grab;
  touch-action: none;
}
.mm__view:focus-visible { outline: 3px solid $stage-ink; outline-offset: 2px; }

.mm__layer {
  width: 100%;
  height: 100%;
  background: $plan;
  transform-origin: center center;
  transform: scale(2.4) translate(0, 0);
}

// 미니맵 — 같은 그림을 통째로 줄여 둔다. 비율은 aspect-ratio 로 본 화면과 맞춘다
.mm__map {
  position: absolute;
  right: $sp-2;
  bottom: $sp-2;
  box-sizing: border-box;
  width: 76px;
  aspect-ratio: 288 / 160;
  overflow: hidden;
  border: 2px solid rgba(255, 247, 230, .72);
  border-radius: $r-sm;
  background: $plan;
  background-size: 100% 100%;
}
.mm__box {
  box-sizing: border-box;
  width: 41.67%;
  height: 41.67%;
  border: 2px solid $color;
  border-radius: $r-xs;
  background: rgba(255, 247, 230, .22);
  transform: translate(21px, 11.7px);
}

// ── 자동 루프 (2s) ────────────────────────────────────
// 본 화면과 미니맵 상자가 같은 시간표로 움직인다. 값이 어긋나면 상자가 거짓말을 한다
.mm.is-demo .mm__layer {
  animation-name: mm-layer;
  animation-duration: $dur-loop;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
.mm.is-demo .mm__box {
  animation-name: mm-box;
  animation-duration: $dur-loop;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}

@keyframes mm-layer {
  0%   { transform: scale(2.4) translate(0, 0); }
  26%  { transform: scale(2.4) translate(-84px, -28px); }
  54%  { transform: scale(2.4) translate(75.6px, 32.7px); }
  80%  { transform: scale(2.4) translate(-33.6px, 9.3px); }
  100% { transform: scale(2.4) translate(0, 0); }
}
@keyframes mm-box {
  0%   { transform: translate(21px, 11.7px); }
  26%  { transform: translate(42px, 18.7px); }
  54%  { transform: translate(2.1px, 3.5px); }
  80%  { transform: translate(29.4px, 9.4px); }
  100% { transform: translate(21px, 11.7px); }
}

@media (prefers-reduced-motion: reduce) {
  .mm.is-demo .mm__layer,
  .mm.is-demo .mm__box { animation: none !important; }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.mm {
  position: relative;
}

.mm__view {
  position: relative;
  box-sizing: border-box;
  width: 288px;
  height: 160px;
  overflow: hidden;
  border-radius: 16px;
  background: #17141a;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  cursor: grab;
  touch-action: none;
}

.mm__view:focus-visible {
  outline: 3px solid #17141a;
  outline-offset: 2px;
}

.mm__layer {
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(0deg, rgba(255, 247, 230, 0.34) 0 0.5%, transparent 0.5% 6%), repeating-linear-gradient(90deg, rgba(255, 247, 230, 0.34) 0 0.5%, transparent 0.5% 8%), radial-gradient(circle at 78% 30%, #ff9ebb 0 9%, transparent 10%), linear-gradient(48deg, transparent 0 38%, rgba(255, 210, 63, 0.9) 38% 44%, transparent 44%), linear-gradient(200deg, #17141a 0%, #2f6df6 58%, #17141a 100%);
  transform-origin: center center;
  transform: scale(2.4) translate(0, 0);
}

.mm__map {
  position: absolute;
  right: 8px;
  bottom: 8px;
  box-sizing: border-box;
  width: 76px;
  aspect-ratio: 288/160;
  overflow: hidden;
  border: 2px solid rgba(255, 247, 230, 0.72);
  border-radius: 8px;
  background: repeating-linear-gradient(0deg, rgba(255, 247, 230, 0.34) 0 0.5%, transparent 0.5% 6%), repeating-linear-gradient(90deg, rgba(255, 247, 230, 0.34) 0 0.5%, transparent 0.5% 8%), radial-gradient(circle at 78% 30%, #ff9ebb 0 9%, transparent 10%), linear-gradient(48deg, transparent 0 38%, rgba(255, 210, 63, 0.9) 38% 44%, transparent 44%), linear-gradient(200deg, #17141a 0%, #2f6df6 58%, #17141a 100%);
  background-size: 100% 100%;
}

.mm__box {
  box-sizing: border-box;
  width: 41.67%;
  height: 41.67%;
  border: 2px solid #fff7e6;
  border-radius: 4px;
  background: rgba(255, 247, 230, 0.22);
  transform: translate(21px, 11.7px);
}

.mm.is-demo .mm__layer {
  animation-name: mm-layer;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

.mm.is-demo .mm__box {
  animation-name: mm-box;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

@keyframes mm-layer {
  0% {
    transform: scale(2.4) translate(0, 0);
  }
  26% {
    transform: scale(2.4) translate(-84px, -28px);
  }
  54% {
    transform: scale(2.4) translate(75.6px, 32.7px);
  }
  80% {
    transform: scale(2.4) translate(-33.6px, 9.3px);
  }
  100% {
    transform: scale(2.4) translate(0, 0);
  }
}
@keyframes mm-box {
  0% {
    transform: translate(21px, 11.7px);
  }
  26% {
    transform: translate(42px, 18.7px);
  }
  54% {
    transform: translate(2.1px, 3.5px);
  }
  80% {
    transform: translate(29.4px, 9.4px);
  }
  100% {
    transform: translate(21px, 11.7px);
  }
}
@media (prefers-reduced-motion: reduce) {
  .mm.is-demo .mm__layer,
  .mm.is-demo .mm__box {
    animation: none !important;
  }
}

// 실제 동작: 큰 화면을 옮기면 미니맵 상자가 같은 비율로 따라간다.
var mm = document.getElementById('mm');
var mmView = document.getElementById('mm-view');
var mmLayer = document.getElementById('mm-layer');
var mmMap = document.getElementById('mm-map');
var mmBox = document.getElementById('mm-box');
var MM_SCALE = 2.4;
var mmPx = 0, mmPy = 0, mmDrag = null;
function mmPaint() {
  var view = mmView.getBoundingClientRect();
  var map = mmMap.getBoundingClientRect();
  var rest = (1 - 1 / MM_SCALE) / 2;
  mmPx = Math.min(Math.max(mmPx, -1), 1);
  mmPy = Math.min(Math.max(mmPy, -1), 1);
  var tx = mmPx * view.width * (MM_SCALE - 1) / 2 / MM_SCALE;
  var ty = mmPy * view.height * (MM_SCALE - 1) / 2 / MM_SCALE;
  mmLayer.style.transform = 'scale(' + MM_SCALE + ') translate(' + tx + 'px,' + ty + 'px)';
  mmBox.style.transform = 'translate(' + rest * map.width * (1 - mmPx) + 'px,' + rest * map.height * (1 - mmPy) + 'px)';
}
function mmMoveBy(dx, dy) { mm.classList.remove('is-demo'); mmPx += dx; mmPy += dy; mmPaint(); }
mmView.addEventListener('pointerdown', function (e) { mmDrag = { x: e.clientX, y: e.clientY }; mmView.setPointerCapture(e.pointerId); });
mmView.addEventListener('pointermove', function (e) {
  if (!mmDrag) return;
  var view = mmView.getBoundingClientRect();
  mmMoveBy((e.clientX - mmDrag.x) / view.width * 2, (e.clientY - mmDrag.y) / view.height * 2);
  mmDrag = { x: e.clientX, y: e.clientY };
});
mmView.addEventListener('pointerup', function () { mmDrag = null; });
mmView.addEventListener('keydown', function (e) {
  var pan = { ArrowLeft: [0.2, 0], ArrowRight: [-0.2, 0], ArrowUp: [0, 0.2], ArrowDown: [0, -0.2] }[e.key];
  if (!pan) return;
  e.preventDefault();
  mmMoveBy(pan[0], pan[1]);
});

import { useRef, useState } from "react";
import type { CSSProperties } from "react";
import styles from "./ZoomMinimap.module.scss";

export type ZoomMinimapProps = {
  label?: string;
  /** 본 화면 배율. style.scss 의 scale 값과 같아야 미니맵 상자가 맞는다 */
  scale?: number;
  /** 자동 재생 루프 (갤러리용). 사람이 손대면 꺼진다 */
  demo?: boolean;
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
type DragEvt = { clientX: number; clientY: number; pointerId: number };
type KeyEvt = { key: string; preventDefault: () => void };

const clamp = (v: number, lo: number, hi: number) => Math.min(Math.max(v, lo), hi);

export default function ZoomMinimap({
  label = "Zoomed blueprint. Move the view with the arrow keys",
  scale = 2.4,
  demo = true,
  duration = 300,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#fff7e6",
}: ZoomMinimapProps) {
  const view = useRef<HTMLDivElement>(null);
  const map = useRef<HTMLDivElement>(null);
  const drag = useRef<{ x: number; y: number } | null>(null);
  const [live, setLive] = useState(demo);
  const [p, setP] = useState({ x: 0, y: 0 });

  function moveBy(dx: number, dy: number) {
    setLive(false);
    setP({ x: clamp(p.x + dx, -1, 1), y: clamp(p.y + dy, -1, 1) });
  }

  const viewBox = view.current ? view.current.getBoundingClientRect() : null;
  const mapBox = map.current ? map.current.getBoundingClientRect() : null;
  const w = viewBox ? viewBox.width : 288;
  const h = viewBox ? viewBox.height : 160;
  const mw = mapBox ? mapBox.width : 76;
  const mh = mapBox ? mapBox.height : 42;
  const rest = (1 - 1 / scale) / 2;
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  const layer: CSSProperties = {
    transform: `scale(${scale}) translate(${(p.x * w * (scale - 1)) / 2 / scale}px,${(p.y * h * (scale - 1)) / 2 / scale}px)`,
  };
  const box: CSSProperties = {
    transform: `translate(${rest * mw * (1 - p.x)}px,${rest * mh * (1 - p.y)}px)`,
  };

  return (
    <div className={[styles.root, live ? styles.isDemo : ""].join(" ")} style={vars}>
      <div
        className={styles.view}
        ref={view}
        tabIndex={0}
        role="img"
        aria-label={label}
        onPointerDown={(e: DragEvt) => { drag.current = { x: e.clientX, y: e.clientY }; }}
        onPointerMove={(e: DragEvt) => {
          const d = drag.current;
          if (!d) return;
          moveBy(((e.clientX - d.x) / w) * 2, ((e.clientY - d.y) / h) * 2);
          drag.current = { x: e.clientX, y: e.clientY };
        }}
        onPointerUp={() => { drag.current = null; }}
        onKeyDown={(e: KeyEvt) => {
          const pan: { [k: string]: number[] } = {
            ArrowLeft: [0.2, 0], ArrowRight: [-0.2, 0], ArrowUp: [0, 0.2], ArrowDown: [0, -0.2],
          };
          if (!pan[e.key]) return;
          e.preventDefault();
          moveBy(pan[e.key][0], pan[e.key][1]);
        }}
      >
        <div className={styles.layer} style={live ? undefined : layer} />
        <div className={styles.map} ref={map} aria-hidden="true">
          <div className={styles.box} style={live ? undefined : box} />
        </div>
      </div>
    </div>
  );
}