ThalionA.github.io/note_flipbook.html at main · ThalionA/ThalionA.github.io · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Daily Logs Flipbook</title>
  <style>
    :root { --accent: #157878; }
    * { box-sizing: border-box; }
    html, body {
      margin: 0;
      padding: 0;
      background: #1c1c1c;
      font-family: "Open Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      color: #fff;
      -webkit-tap-highlight-color: transparent;
    }
    .book-wrap {
      max-width: 640px;
      margin: 0 auto;
      padding: 14px 12px 18px;
    }
    .stage {
      position: relative;
      width: 100%;
      /* journal pages are roughly portrait; keep a stable aspect box */
      aspect-ratio: 3 / 4;
      background: #2a2a2a;
      border-radius: 6px;
      overflow: hidden;
      box-shadow: 0 10px 30px rgba(0,0,0,.45);
      perspective: 1600px;
    }
    .page-img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: contain;
      background: #fff;
      opacity: 0;
      transform: rotateY(-12deg);
      transition: opacity .28s ease, transform .28s ease;
      pointer-events: none;
    }
    .page-img.is-current {
      opacity: 1;
      transform: rotateY(0deg);
      pointer-events: auto;
    }
    /* invisible click zones for prev/next */
    .tap {
      position: absolute;
      top: 0;
      bottom: 0;
      width: 38%;
      z-index: 5;
      cursor: pointer;
      border: 0;
      background: transparent;
      padding: 0;
    }
    .tap.prev { left: 0; }
    .tap.next { right: 0; }
    .spinner {
      position: absolute;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      color: #aaa;
    }
    .controls {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 14px;
      margin-top: 12px;
    }
    .controls button {
      appearance: none;
      border: 0;
      background: var(--accent);
      color: #fff;
      font-size: 15px;
      font-weight: 700;
      padding: 9px 18px;
      border-radius: 999px;
      cursor: pointer;
      transition: filter .15s ease, transform .05s ease;
    }
    .controls button:hover { filter: brightness(1.12); }
    .controls button:active { transform: translateY(1px); }
    .controls button:disabled {
      opacity: .35;
      cursor: not-allowed;
      filter: none;
    }
    .counter {
      min-width: 72px;
      text-align: center;
      font-variant-numeric: tabular-nums;
      font-size: 14px;
      color: #ddd;
    }
    .hint {
      text-align: center;
      margin: 10px 0 0;
      font-size: 12px;
      color: #888;
    }
    @media (max-width: 480px) {
      .controls button { padding: 9px 14px; font-size: 14px; }
    }
  </style>
</head>
<body>
  <div class="book-wrap">
    <div class="stage" id="stage">
      <div class="spinner" id="spinner">Loading journal…</div>
      <button class="tap prev" id="tapPrev" aria-label="Previous page"></button>
      <button class="tap next" id="tapNext" aria-label="Next page"></button>
    </div>

    <div class="controls">
      <button id="btnPrev" aria-label="Previous page">‹ Prev</button>
      <span class="counter" id="counter">1 / 45</span>
      <button id="btnNext" aria-label="Next page">Next ›</button>
    </div>
    <p class="hint">Use the buttons, arrow keys, tap the sides, or swipe.</p>
  </div>

  <script>
    (function () {
      var TOTAL = 45;
      var stage = document.getElementById('stage');
      var spinner = document.getElementById('spinner');
      var counter = document.getElementById('counter');
      var btnPrev = document.getElementById('btnPrev');
      var btnNext = document.getElementById('btnNext');
      var tapPrev = document.getElementById('tapPrev');
      var tapNext = document.getElementById('tapNext');

      var imgs = [];
      var current = 0;
      var loaded = {};

      function srcFor(i) { return 'images/Page' + (i + 1) + '.jpg'; }

      function ensureLoaded(i) {
        if (i < 0 || i >= TOTAL || loaded[i]) return;
        loaded[i] = true;
        var el = imgs[i];
        el.src = srcFor(i);
      }

      // build the image elements lazily
      for (var i = 0; i < TOTAL; i++) {
        var img = document.createElement('img');
        img.className = 'page-img';
        img.alt = 'Journal page ' + (i + 1);
        img.decoding = 'async';
        stage.appendChild(img);
        imgs.push(img);
      }

      function render() {
        for (var i = 0; i < TOTAL; i++) {
          imgs[i].classList.toggle('is-current', i === current);
        }
        // preload current + neighbours
        ensureLoaded(current);
        ensureLoaded(current + 1);
        ensureLoaded(current - 1);
        counter.textContent = (current + 1) + ' / ' + TOTAL;
        btnPrev.disabled = tapPrev.disabled = current === 0;
        btnNext.disabled = tapNext.disabled = current === TOTAL - 1;
        if (spinner) { spinner.style.display = 'none'; }
      }

      function go(delta) {
        var next = Math.min(TOTAL - 1, Math.max(0, current + delta));
        if (next === current) return;
        current = next;
        render();
      }

      btnPrev.addEventListener('click', function () { go(-1); });
      btnNext.addEventListener('click', function () { go(1); });
      tapPrev.addEventListener('click', function () { go(-1); });
      tapNext.addEventListener('click', function () { go(1); });

      document.addEventListener('keydown', function (e) {
        if (e.key === 'ArrowLeft') { go(-1); }
        else if (e.key === 'ArrowRight') { go(1); }
      });

      // touch swipe
      var startX = null;
      stage.addEventListener('touchstart', function (e) {
        startX = e.touches[0].clientX;
      }, { passive: true });
      stage.addEventListener('touchend', function (e) {
        if (startX === null) return;
        var dx = e.changedTouches[0].clientX - startX;
        if (Math.abs(dx) > 40) { go(dx < 0 ? 1 : -1); }
        startX = null;
      }, { passive: true });

      render();
    })();
  </script>
</body>
</html>