03Prompt theme switcher

<main class="stage">
<div class="pt is-demo" id="pt" data-shape="plain">
  <div class="pt__pick" role="group" aria-label="Prompt shape">
    <button class="pt__btn" type="button" data-shape="plain" aria-pressed="true">Plain<span class="pt__bar" aria-hidden="true"></span></button>
    <button class="pt__btn" type="button" data-shape="wave" aria-pressed="false">Wave<span class="pt__bar" aria-hidden="true"></span></button>
    <button class="pt__btn" type="button" data-shape="seg" aria-pressed="false">Segment<span class="pt__bar" aria-hidden="true"></span></button>
  </div>
  <div class="pt__screen">
    <div class="pt__view pt__view--plain">
      <span class="pt__path">~/work/site</span>
      <span class="pt__git">git:(main)</span>
      <span class="pt__caret">&#10095;</span>
    </div>
    <div class="pt__view pt__view--wave">
      <span class="pt__user">you</span><span class="pt__at">@</span><span class="pt__host">mac</span>
      <span class="pt__path">~/work/site</span>
      <span class="pt__caret pt__caret--wave">&#10095;&#10095;</span>
    </div>
    <div class="pt__view pt__view--seg">
      <span class="pt__seg pt__seg--a">~/work/site</span><span class="pt__seg pt__seg--b">main</span><span class="pt__seg pt__seg--c">node 22</span>
    </div>
  </div>
</div>
</main>

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

// 프롬프트 테마 전환 — 같은 한 줄 프롬프트를 기본·물결·조각 세 모양으로 갈아 끼운다.
// 세 모양은 같은 격자 칸(grid-area: 1 / 1)에 겹쳐 두어 모양이 바뀌어도 화면 높이가 안 흔들린다.
// 조각 모양의 꺾인 이음매는 clip-path 로 잘라 만든다 — 삼각형을 따로 겹치지 않는다.
// 갈아 끼우기는 steps(1, end) 컷이고, 프레임을 채우는 작은 움직임은 버튼 밑줄의 scaleX 다
// (컷만 있으면 움직인 프레임이 두세 장에 그친다 — 252 실측).

$duration: $dur-quick;
$easing: $ease-spring;
$color: $chart-3;
$mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", monospace;
$line: rgba(255, 255, 255, .16);
$dim: rgba(255, 255, 255, .6);
$notch: 8px;

@include stage($stage-ink);

.pt {
  display: flex; flex-direction: column; gap: $sp-3;
  box-sizing: border-box; width: min(100%, 408px);
  padding: $sp-3; border: 1px solid $line; border-radius: $r-card;
  background: rgba(255, 255, 255, .05); font-family: $mono;
}

.pt__pick { display: grid; grid-template-columns: repeat(3, 1fr); gap: $sp-2; }
.pt__btn {
  position: relative; box-sizing: border-box; width: 100%; padding: $sp-1 0 $sp-2;
  border: 0; border-radius: 0; background: none; color: $dim; cursor: pointer;
  font-family: inherit; font-weight: 700; font-size: clamp(11px, 3vw, 12px); line-height: 1.4;
}
.pt__btn[aria-pressed="true"] { color: $subject-cream; }
.pt__btn:focus-visible { outline: 2px solid $subject-blue; outline-offset: 2px; }
// 밑줄은 버튼 아래 변에 붙은 요소라 왼쪽 변을 원점으로 자란다 (blog-demo 규칙 8 의 예외 항목)
.pt__bar {
  position: absolute; left: 0; right: 0; bottom: 0; height: 2px; border-radius: $r-pill;
  background: $color; transform: scaleX(0); transform-origin: left center;
  transition: transform $duration $easing;
}
.pt__btn[aria-pressed="true"] .pt__bar { transform: scaleX(1); }

.pt__screen { display: grid; min-height: 26px; align-items: center; }
.pt__screen > * { grid-area: 1 / 1; }
.pt__view {
  display: flex; align-items: center; gap: $sp-2; min-width: 0;
  font-weight: 600; font-size: clamp(10px, 2.8vw, 12px); line-height: 1.4;
  white-space: nowrap; visibility: hidden;
}
.pt[data-shape="plain"] .pt__view--plain,
.pt[data-shape="wave"] .pt__view--wave,
.pt[data-shape="seg"] .pt__view--seg { visibility: visible; }

// 경로는 하늘색이다 — 판 바탕 #232025 위에서 $subject-blue 는 3.57:1 로 본문 기준 4.5:1 에 못 미친다.
// $subject-sky 로 올려 8.74:1 (이 편 실측, run/294/_probe/contrast.py)
.pt__path { color: $subject-sky; }
.pt__git { color: $stage-yellow; }
.pt__caret { color: $color; font-weight: 800; }
.pt__user { color: $color; }
.pt__at { color: $dim; }
.pt__host { color: $subject-cream; }
.pt__caret--wave { color: $subject-pink; letter-spacing: -1px; }
.pt__view--wave { gap: 0; }
.pt__view--wave .pt__path { margin-left: $sp-2; }
.pt__view--wave .pt__caret--wave { margin-left: $sp-2; }

// ── 조각 모양: 오른쪽 끝을 화살표로 깎고 다음 조각이 그 홈에 물린다
.pt__view--seg { gap: 0; }
.pt__seg {
  display: inline-flex; align-items: center;
  box-sizing: border-box; height: 22px; padding: 0 $sp-3 0 $sp-2;
  color: $stage-ink; font-weight: 700;
  clip-path: polygon(0 0, calc(100% - #{$notch}) 0, 100% 50%, calc(100% - #{$notch}) 100%, 0 100%);
}
.pt__seg--a { background: $subject-sky; padding-left: $sp-2; }
.pt__seg--b { background: $stage-yellow; margin-left: -$notch; padding-left: $sp-3; }
.pt__seg--c { background: $color; margin-left: -$notch; padding-left: $sp-3; padding-right: $sp-2; }

// ── 격자 미리보기 루프 (2초): 기본 → 물결 → 조각 을 컷으로, 밑줄은 그때마다 scaleX 로 자란다
.pt.is-demo .pt__view,
.pt.is-demo .pt__btn {
  animation-duration: $dur-loop; animation-timing-function: steps(1, end);
  animation-iteration-count: infinite; animation-fill-mode: backwards;
}
.pt.is-demo .pt__view--plain { animation-name: ptShow1; }
.pt.is-demo .pt__view--wave { animation-name: ptShow2; }
.pt.is-demo .pt__view--seg { animation-name: ptShow3; }
@keyframes ptShow1 {
  0%, 33% { visibility: visible; }
  34%, 100% { visibility: hidden; }
}
@keyframes ptShow2 {
  0%, 33% { visibility: hidden; }
  34%, 66% { visibility: visible; }
  67%, 100% { visibility: hidden; }
}
@keyframes ptShow3 {
  0%, 66% { visibility: hidden; }
  67%, 100% { visibility: visible; }
}
.pt.is-demo .pt__btn:nth-child(1) { animation-name: ptOn1; }
.pt.is-demo .pt__btn:nth-child(2) { animation-name: ptOn2; }
.pt.is-demo .pt__btn:nth-child(3) { animation-name: ptOn3; }
@keyframes ptOn1 {
  0%, 33% { color: $subject-cream; }
  34%, 100% { color: $dim; }
}
@keyframes ptOn2 {
  0%, 33% { color: $dim; }
  34%, 66% { color: $subject-cream; }
  67%, 100% { color: $dim; }
}
@keyframes ptOn3 {
  0%, 66% { color: $dim; }
  67%, 100% { color: $subject-cream; }
}
// 밑줄만 연속 보간이다 — steps 와 한 요소에 섞으면 채움이 컷으로 죽는다 (266-09 실측)
.pt.is-demo .pt__btn:nth-child(1) .pt__bar { animation-name: ptBar1; }
.pt.is-demo .pt__btn:nth-child(2) .pt__bar { animation-name: ptBar2; }
.pt.is-demo .pt__btn:nth-child(3) .pt__bar { animation-name: ptBar3; }
.pt.is-demo .pt__bar {
  animation-duration: $dur-loop; animation-timing-function: $easing;
  animation-iteration-count: infinite; animation-fill-mode: backwards;
}
@keyframes ptBar1 {
  0% { transform: scaleX(0); }
  12%, 33% { transform: scaleX(1); }
  34%, 100% { transform: scaleX(0); }
}
@keyframes ptBar2 {
  0%, 34% { transform: scaleX(0); }
  46%, 66% { transform: scaleX(1); }
  67%, 100% { transform: scaleX(0); }
}
@keyframes ptBar3 {
  0%, 67% { transform: scaleX(0); }
  79%, 100% { transform: scaleX(1); }
}

@media (max-width: 340px) {
  .pt { padding: $sp-2; gap: $sp-2; }
  .pt__seg { padding-right: $sp-2; }
  .pt__seg--b, .pt__seg--c { padding-left: $sp-2; }
}

@media (prefers-reduced-motion: reduce) {
  .pt.is-demo .pt__view,
  .pt.is-demo .pt__btn,
  .pt.is-demo .pt__bar { animation: none !important; }
  .pt.is-demo .pt__view--plain { visibility: visible !important; }
  .pt.is-demo .pt__view--wave,
  .pt.is-demo .pt__view--seg { visibility: hidden !important; }
  .pt__bar { transition: none !important; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.pt {
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-sizing: border-box;
  width: min(100%, 408px);
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", monospace;
}

.pt__pick {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.pt__btn {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  padding: 4px 0 8px;
  border: 0;
  border-radius: 0;
  background: none;
  color: rgba(255, 255, 255, 0.6);
  cursor: pointer;
  font-family: inherit;
  font-weight: 700;
  font-size: clamp(11px, 3vw, 12px);
  line-height: 1.4;
}

.pt__btn[aria-pressed=true] {
  color: #fff7e6;
}

.pt__btn:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: 2px;
}

.pt__bar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 999px;
  background: #2b9d74;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.pt__btn[aria-pressed=true] .pt__bar {
  transform: scaleX(1);
}

.pt__screen {
  display: grid;
  min-height: 26px;
  align-items: center;
}

.pt__screen > * {
  grid-area: 1/1;
}

.pt__view {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  font-weight: 600;
  font-size: clamp(10px, 2.8vw, 12px);
  line-height: 1.4;
  white-space: nowrap;
  visibility: hidden;
}

.pt[data-shape=plain] .pt__view--plain,
.pt[data-shape=wave] .pt__view--wave,
.pt[data-shape=seg] .pt__view--seg {
  visibility: visible;
}

.pt__path {
  color: #6ec8ff;
}

.pt__git {
  color: #ffd23f;
}

.pt__caret {
  color: #2b9d74;
  font-weight: 800;
}

.pt__user {
  color: #2b9d74;
}

.pt__at {
  color: rgba(255, 255, 255, 0.6);
}

.pt__host {
  color: #fff7e6;
}

.pt__caret--wave {
  color: #ff9ebb;
  letter-spacing: -1px;
}

.pt__view--wave {
  gap: 0;
}

.pt__view--wave .pt__path {
  margin-left: 8px;
}

.pt__view--wave .pt__caret--wave {
  margin-left: 8px;
}

.pt__view--seg {
  gap: 0;
}

.pt__seg {
  display: inline-flex;
  align-items: center;
  box-sizing: border-box;
  height: 22px;
  padding: 0 12px 0 8px;
  color: #17141a;
  font-weight: 700;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 50%, calc(100% - 8px) 100%, 0 100%);
}

.pt__seg--a {
  background: #6ec8ff;
  padding-left: 8px;
}

.pt__seg--b {
  background: #ffd23f;
  margin-left: -8px;
  padding-left: 12px;
}

.pt__seg--c {
  background: #2b9d74;
  margin-left: -8px;
  padding-left: 12px;
  padding-right: 8px;
}

.pt.is-demo .pt__view,
.pt.is-demo .pt__btn {
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

.pt.is-demo .pt__view--plain {
  animation-name: ptShow1;
}

.pt.is-demo .pt__view--wave {
  animation-name: ptShow2;
}

.pt.is-demo .pt__view--seg {
  animation-name: ptShow3;
}

@keyframes ptShow1 {
  0%, 33% {
    visibility: visible;
  }
  34%, 100% {
    visibility: hidden;
  }
}
@keyframes ptShow2 {
  0%, 33% {
    visibility: hidden;
  }
  34%, 66% {
    visibility: visible;
  }
  67%, 100% {
    visibility: hidden;
  }
}
@keyframes ptShow3 {
  0%, 66% {
    visibility: hidden;
  }
  67%, 100% {
    visibility: visible;
  }
}
.pt.is-demo .pt__btn:nth-child(1) {
  animation-name: ptOn1;
}

.pt.is-demo .pt__btn:nth-child(2) {
  animation-name: ptOn2;
}

.pt.is-demo .pt__btn:nth-child(3) {
  animation-name: ptOn3;
}

@keyframes ptOn1 {
  0%, 33% {
    color: #fff7e6;
  }
  34%, 100% {
    color: rgba(255, 255, 255, 0.6);
  }
}
@keyframes ptOn2 {
  0%, 33% {
    color: rgba(255, 255, 255, 0.6);
  }
  34%, 66% {
    color: #fff7e6;
  }
  67%, 100% {
    color: rgba(255, 255, 255, 0.6);
  }
}
@keyframes ptOn3 {
  0%, 66% {
    color: rgba(255, 255, 255, 0.6);
  }
  67%, 100% {
    color: #fff7e6;
  }
}
.pt.is-demo .pt__btn:nth-child(1) .pt__bar {
  animation-name: ptBar1;
}

.pt.is-demo .pt__btn:nth-child(2) .pt__bar {
  animation-name: ptBar2;
}

.pt.is-demo .pt__btn:nth-child(3) .pt__bar {
  animation-name: ptBar3;
}

.pt.is-demo .pt__bar {
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

@keyframes ptBar1 {
  0% {
    transform: scaleX(0);
  }
  12%, 33% {
    transform: scaleX(1);
  }
  34%, 100% {
    transform: scaleX(0);
  }
}
@keyframes ptBar2 {
  0%, 34% {
    transform: scaleX(0);
  }
  46%, 66% {
    transform: scaleX(1);
  }
  67%, 100% {
    transform: scaleX(0);
  }
}
@keyframes ptBar3 {
  0%, 67% {
    transform: scaleX(0);
  }
  79%, 100% {
    transform: scaleX(1);
  }
}
@media (max-width: 340px) {
  .pt {
    padding: 8px;
    gap: 8px;
  }
  .pt__seg {
    padding-right: 8px;
  }
  .pt__seg--b, .pt__seg--c {
    padding-left: 8px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .pt.is-demo .pt__view,
  .pt.is-demo .pt__btn,
  .pt.is-demo .pt__bar {
    animation: none !important;
  }
  .pt.is-demo .pt__view--plain {
    visibility: visible !important;
  }
  .pt.is-demo .pt__view--wave,
  .pt.is-demo .pt__view--seg {
    visibility: hidden !important;
  }
  .pt__bar {
    transition: none !important;
  }
}

var pt = document.getElementById('pt');
var btns = Array.prototype.slice.call(pt.querySelectorAll('.pt__btn'));
function pickShape(shape) {
  pt.classList.remove('is-demo');
  pt.setAttribute('data-shape', shape);
  btns.forEach(function (b) { b.setAttribute('aria-pressed', String(b.dataset.shape === shape)); });
}
btns.forEach(function (b) { b.addEventListener('click', function () { pickShape(b.dataset.shape); }); });

// PromptThemeSwitcher — vanilla 판(run/294/demo/03-terminal-prompt-theme-switcher/index.html) 의 React 포트.
// 같은 한 줄 프롬프트를 기본·물결·조각 세 모양으로 갈아 끼운다. 버튼을 한 번 누르면
// 격자 미리보기 루프(demo)가 꺼지고 사람이 고른 모양만 남는다.
import { useState } from "react";
import type { CSSProperties } from "react";
import styles from "./PromptThemeSwitcher.module.scss";

export type PromptThemeSwitcherProps = {
  /** 격자 미리보기용 2초 자동 루프. 모양 버튼을 누르면 꺼진다 */
  demo?: boolean;
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };

/** 값은 data-shape 에 그대로 들어가는 영어 key, 이름은 화면에 찍히는 한국어 문구 */
const SHAPES = [
  { value: "plain", label: "기본" },
  { value: "wave", label: "물결" },
  { value: "seg", label: "조각" },
];

export default function PromptThemeSwitcher({
  demo = true,
  duration = 220,
  easing = "cubic-bezier(.2, .8, .2, 1)",
  color = "#2b9d74",
}: PromptThemeSwitcherProps) {
  const [live, setLive] = useState(demo);
  const [shape, setShape] = useState("plain");
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  function pickShape(next: string) {
    setLive(false);
    setShape(next);
  }

  const cls = [styles.root, live ? styles.isDemo : ""].filter(Boolean).join(" ");
  return (
    <main className={styles.stage} style={vars}>
      <div className={cls} data-shape={shape}>
        <div className={styles.pick} role="group" aria-label="프롬프트 모양">
          {SHAPES.map((s) => (
            <button
              className={styles.btn}
              type="button"
              key={s.value}
              data-shape={s.value}
              aria-pressed={shape === s.value}
              onClick={() => pickShape(s.value)}
            >
              {s.label}
              <span className={styles.bar} aria-hidden="true" />
            </button>
          ))}
        </div>
        <div className={styles.screen}>
          <div className={`${styles.view} ${styles.viewPlain}`}>
            <span className={styles.path}>~/work/site</span>
            <span className={styles.git}>git:(main)</span>
            <span className={styles.caret}>❯</span>
          </div>
          <div className={`${styles.view} ${styles.viewWave}`}>
            <span className={styles.user}>you</span><span className={styles.at}>@</span><span className={styles.host}>mac</span>
            <span className={styles.path}>~/work/site</span>
            <span className={`${styles.caret} ${styles.caretWave}`}>❯❯</span>
          </div>
          <div className={`${styles.view} ${styles.viewSeg}`}>
            <span className={`${styles.seg} ${styles.segA}`}>~/work/site</span><span className={`${styles.seg} ${styles.segB}`}>main</span><span className={`${styles.seg} ${styles.segC}`}>node 22</span>
          </div>
        </div>
      </div>
    </main>
  );
}