04Tone Swap Where a Chosen Tone Value Redraws a Whole Emoji Set

<main class="stage">
<div class="tn is-demo" id="tn">
  <div class="tn__strip" role="radiogroup" aria-label="Tone selection" id="tnStrip"></div>
  <ul class="tn__grid" id="tnGrid"></ul>
  <p class="tn__sr" role="status" aria-live="polite" id="tnLive"></p>
</div>
</main>

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

// 계산 겹: index.html combine() 이 사람 형태 이모지의 코드포인트에 톤 수정자 코드포인트를 그대로
// 이어 붙여 새 문자를 만든다 — 미리 렌더한 다섯 벌 그림을 바꿔 끼우는 게 아니라 문자 자체를 조합한다.
@include stage($stage-paper);

.tn { width: min(100%, 320px); display: flex; flex-direction: column; gap: $sp-3; align-items: center; }

.tn__strip { display: flex; gap: $sp-1; }
.tn__swatch {
  width: 22px; height: 22px; border-radius: 50%; border: none; padding: 0; cursor: pointer;
  box-shadow: inset 0 0 0 2px rgba($subject-ink, .18); transition: transform $dur-quick $ease-spring, box-shadow $dur-quick $ease-out;
}
.tn__swatch--t0 { background: #dccbb8; }
.tn__swatch--t1 { background: #ffe0c4; }
.tn__swatch--t2 { background: #eae1d5; }
.tn__swatch--t3 { background: #d29b6a; }
.tn__swatch--t4 { background: #a86f43; }
.tn__swatch--t5 { background: #6b4527; }
.tn__swatch[aria-checked="true"] { transform: scale(1.18); box-shadow: inset 0 0 0 2px $subject-ink, 0 0 0 3px $subject-cream; }

.tn__grid {
  list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: $sp-2;
  width: 100%;
}
.tn__item { display: flex; align-items: center; justify-content: center; background: rgba($subject-ink, .06); border-radius: $r-sm; padding: $sp-1; }
.tn__ch { font-size: 20px; line-height: 1; display: inline-block; }
.tn__ch--swap { animation: tnPop $dur-quick $ease-pop; }

.tn__sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); margin: -1px; padding: 0; border: 0; }

@keyframes tnPop { 0% { opacity: .35; transform: scale(.72); } 100% { opacity: 1; transform: scale(1); } }

@media (max-width: 340px) {
  .tn { width: 100%; }
  .tn__grid { grid-template-columns: repeat(4, 1fr); }
  .tn__ch { font-size: 17px; }
}

@media (prefers-reduced-motion: reduce) {
  .tn__swatch { transition: none; }
  .tn__ch--swap { animation: none; }
}

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

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

.tn {
  width: min(100%, 320px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.tn__strip {
  display: flex;
  gap: 4px;
}

.tn__swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  padding: 0;
  cursor: pointer;
  box-shadow: inset 0 0 0 2px rgba(23, 20, 26, 0.18);
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 220ms ease-out;
}

.tn__swatch--t0 {
  background: #dccbb8;
}

.tn__swatch--t1 {
  background: #ffe0c4;
}

.tn__swatch--t2 {
  background: #eae1d5;
}

.tn__swatch--t3 {
  background: #d29b6a;
}

.tn__swatch--t4 {
  background: #a86f43;
}

.tn__swatch--t5 {
  background: #6b4527;
}

.tn__swatch[aria-checked=true] {
  transform: scale(1.18);
  box-shadow: inset 0 0 0 2px #17141a, 0 0 0 3px #fff7e6;
}

.tn__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  width: 100%;
}

.tn__item {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(23, 20, 26, 0.06);
  border-radius: 8px;
  padding: 4px;
}

.tn__ch {
  font-size: 20px;
  line-height: 1;
  display: inline-block;
}

.tn__ch--swap {
  animation: tnPop 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.tn__sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  margin: -1px;
  padding: 0;
  border: 0;
}

@keyframes tnPop {
  0% {
    opacity: 0.35;
    transform: scale(0.72);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}
@media (max-width: 340px) {
  .tn {
    width: 100%;
  }
  .tn__grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .tn__ch {
    font-size: 17px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .tn__swatch {
    transition: none;
  }
  .tn__ch--swap {
    animation: none;
  }
}

(function () {
  // 계산 겹: 사람 형태 이모지의 원본 코드포인트에 톤 수정자 코드포인트(U+1F3FB~U+1F3FF)를 이어 붙여
  // 새 문자열을 만든다 — 미리 그려둔 다섯 벌을 갈아 끼우는 게 아니라 매번 코드포인트를 조합한다.
  var EMOJI_TONE_MODIFIERS = ['\u{1F3FB}', '\u{1F3FC}', '\u{1F3FD}', '\u{1F3FE}', '\u{1F3FF}'];
  var TONE_NAMES = ['Default', 'Tone 1', 'Tone 2', 'Tone 3', 'Tone 4', 'Tone 5'];
  var BASES = [
    { cp: '\u{1F44B}', name: 'waving hand' }, { cp: '\u{1F44D}', name: 'thumbs up' },
    { cp: '\u{1F44F}', name: 'clapping hands' }, { cp: '\u{270B}', name: 'raised hand' },
    { cp: '\u{1F64F}', name: 'folded hands' }, { cp: '\u{1F4AA}', name: 'flexed bicep' },
    { cp: '\u{1F44C}', name: 'ok hand' }, { cp: '\u{270C}', name: 'victory hand' },
    { cp: '\u{270D}', name: 'writing hand' }, { cp: '\u{1F64B}', name: 'raising hand' }
  ];

  function combine(base, toneIndex) {
    if (toneIndex === 0) return base;
    return base + EMOJI_TONE_MODIFIERS[toneIndex - 1];
  }

  var root = document.getElementById('tn');
  var strip = document.getElementById('tnStrip');
  var grid = document.getElementById('tnGrid');
  var live = document.getElementById('tnLive');

  var synthetic = false;
  function human() { if (synthetic) return; if (root.classList.contains('is-demo')) root.classList.remove('is-demo'); }

  var mounted = false;
  var tone = 0;
  var swatchEls = [];

  function buildStrip() {
    TONE_NAMES.forEach(function (label, i) {
      var b = document.createElement('button');
      b.type = 'button'; b.className = 'tn__swatch tn__swatch--t' + i;
      b.setAttribute('role', 'radio'); b.setAttribute('aria-checked', i === 0 ? 'true' : 'false');
      b.setAttribute('aria-label', label);
      b.addEventListener('click', function () { human(); setTone(i); });
      strip.appendChild(b);
      swatchEls.push(b);
    });
  }

  function buildGrid() {
    BASES.forEach(function (it) {
      var li = document.createElement('li');
      li.className = 'tn__item'; li.dataset.base = it.cp;
      li.innerHTML = '<span class="tn__ch"></span>';
      grid.appendChild(li);
    });
  }

  function renderGrid() {
    Array.prototype.forEach.call(grid.children, function (li) {
      var ch = li.querySelector('.tn__ch');
      if (mounted) { ch.classList.remove('tn__ch--swap'); void ch.offsetWidth; ch.classList.add('tn__ch--swap'); }
      ch.textContent = combine(li.dataset.base, tone);
    });
  }

  function setTone(i) {
    tone = i;
    swatchEls.forEach(function (b, j) { b.setAttribute('aria-checked', j === i ? 'true' : 'false'); });
    renderGrid();
    live.textContent = TONE_NAMES[i] + '  selected, ' + BASES.length + ' updated';
  }

  buildStrip();
  buildGrid();
  renderGrid();
  mounted = true;

  var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  var order = [1, 3, 5, 2, 4, 0];
  var oi = 0, loopTimer = 0;
  function loop() {
    if (!root.classList.contains('is-demo')) return;
    synthetic = true; swatchEls[order[oi % order.length]].click(); synthetic = false;
    oi++;
    loopTimer = window.setTimeout(loop, 620);
  }
  if (!reduce) { loopTimer = window.setTimeout(loop, 500); }
  else { root.classList.remove('is-demo'); }
})();

// EmojiSkinToneModifierSwap — vanilla 판(run/402/demo/04-.../index.html) 의 React 포트.
// combine() 은 사람 형태 이모지의 원본 코드포인트에 톤 수정자 코드포인트(U+1F3FB~U+1F3FF)를 그대로
// 이어 붙여 새 문자를 만든다 — 다섯 벌을 미리 그려 바꿔 끼우지 않고 문자 자체를 조합한다.
import { useEffect, useRef, useState } from "react";
import styles from "./EmojiSkinToneModifierSwap.module.scss";

type Box<T> = { current: T };

const EMOJI_TONE_MODIFIERS = ["\u{1F3FB}", "\u{1F3FC}", "\u{1F3FD}", "\u{1F3FE}", "\u{1F3FF}"];
const TONE_NAMES = ["기본", "톤 1", "톤 2", "톤 3", "톤 4", "톤 5"];
const BASES = [
  { cp: "\u{1F44B}", name: "waving hand" }, { cp: "\u{1F44D}", name: "thumbs up" },
  { cp: "\u{1F44F}", name: "clapping hands" }, { cp: "\u{270B}", name: "raised hand" },
  { cp: "\u{1F64F}", name: "folded hands" }, { cp: "\u{1F4AA}", name: "flexed bicep" },
  { cp: "\u{1F44C}", name: "ok hand" }, { cp: "\u{270C}", name: "victory hand" },
  { cp: "\u{270D}", name: "writing hand" }, { cp: "\u{1F64B}", name: "raising hand" },
];

function combine(base: string, toneIndex: number): string {
  if (toneIndex === 0) return base;
  return base + EMOJI_TONE_MODIFIERS[toneIndex - 1];
}

export default function EmojiSkinToneModifierSwap() {
  const [isDemo, setIsDemo] = useState(true);
  const [tone, setToneState] = useState(0);

  const [swapKey, setSwapKey] = useState(0);

  const isDemoRef = useRef(true) as unknown as Box<boolean>;
  const synthRef = useRef(false) as unknown as Box<boolean>;
  const toneRef = useRef(0) as unknown as Box<number>;
  const mountedRef = useRef(false) as unknown as Box<boolean>;
  const liveRef = useRef(null) as unknown as Box<HTMLParagraphElement>;
  const loopTimerRef = useRef(0) as unknown as Box<number>;
  const swatchRefs = useRef({} as { [i: number]: HTMLButtonElement }) as unknown as Box<{ [i: number]: HTMLButtonElement }>;

  function human() {
    if (synthRef.current) return;
    if (isDemoRef.current) { isDemoRef.current = false; setIsDemo(false); }
  }

  function setTone(i: number) {
    toneRef.current = i;
    setToneState(i);
    if (mountedRef.current) setSwapKey((k) => k + 1);
    if (liveRef.current) liveRef.current.textContent = TONE_NAMES[i] + " 선택됨, " + BASES.length + "개 갱신";
  }

  function onSwatchClick(i: number) {
    human();
    setTone(i);
  }

  useEffect(() => {
    mountedRef.current = true;
    const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
    const order = [1, 3, 5, 2, 4, 0];
    let oi = 0;
    function loop() {
      if (!isDemoRef.current) return;
      const i = order[oi % order.length];
      const btn = swatchRefs.current[i];
      synthRef.current = true;
      if (btn) btn.click(); else onSwatchClick(i);
      synthRef.current = false;
      oi++;
      loopTimerRef.current = window.setTimeout(loop, 620);
    }
    if (!reduce) { loopTimerRef.current = window.setTimeout(loop, 500); }
    else { isDemoRef.current = false; setIsDemo(false); }
    return () => window.clearTimeout(loopTimerRef.current);
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  return (
    <main className={styles.stage}>
      <div className={styles.tn + " " + (isDemo ? styles.isDemo : "")}>
        <div className={styles.strip} role="radiogroup" aria-label="톤 선택">
          {TONE_NAMES.map((label, i) => (
            <button
              key={label}
              type="button"
              className={styles.swatch + " " + (styles as any)["swatchT" + i]}
              role="radio"
              aria-checked={tone === i}
              aria-label={label}
              ref={(el: HTMLButtonElement | null) => { if (el) swatchRefs.current[i] = el; }}
              onClick={() => onSwatchClick(i)}
            />
          ))}
        </div>
        <ul className={styles.grid}>
          {BASES.map((it) => (
            <li key={it.name} className={styles.item}>
              <span key={it.name + "-" + swapKey} className={styles.ch + " " + styles.chSwap}>{combine(it.cp, tone)}</span>
            </li>
          ))}
        </ul>
        <p className={styles.sr} role="status" aria-live="polite" ref={liveRef} />
      </div>
    </main>
  );
}