extra/totoga2-copy-ebook.html

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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>水晶男孩｜六六歌2 — 紀實電子書</title>
    <link rel="stylesheet" href="../assets/css/style.css">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css">
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</head>

<body class="ebook-ssg2-page totoga2-page">
    <header class="map-archive-header">
        <div class="header-inner">
            <h1 class="main-title">無限挑戰 · 六六歌2</h1>
            <div class="subtitle-wrap">
                <span class="sub-title">水晶男孩回來啦！</span>
            </div>
        </div>
    </header>

    <nav class="portal-nav" aria-label="水晶男孩推廣部導覽" data-portal-nav></nav>

    <canvas id="particles"></canvas>

    <nav class="ebook-back-link content-container totoga2-split-crossnav" aria-label="六六歌2 複本分頁">
        <a href="totoga2-video.html" class="btn">節目影片</a>
        <a href="totoga2-copy-ebook.html" class="btn" aria-current="page">紀實電子書</a>
        <a href="totoga2-copy-timeline.html" class="btn">時間軸＋長文</a>
        <a href="totoga2%20copy.html" class="btn">複本總覽</a>
    </nav>

    <div class="content-container ebook-main">
        <section class="ebook-intro section" aria-label="電子書說明">
            <h2 class="section-title">紀實電子書</h2>
            <p class="ebook-intro-lead">
                以下為《無限挑戰》六六歌2 紀實跨頁 PDF（以 PDF.js 載入、PageFlip 翻頁）。若載入較慢請稍候；請以本機伺服器開啟頁面（勿用 file://），否則 PDF 可能被瀏覽器擋下。
            </p>
        </section>

        <!-- <div class="flip-ebook-shell">
            <div class="flip-ebook-aspect">
                <iframe src="https://online.fliphtml5.com/tjyxm/vqff/" title="2023_電子書_無限挑戰六六歌2_final跨頁"
                    allowfullscreen></iframe>
            </div>
        </div> -->

        <div class="flip-ebook-shell">
            <div id="book-container" class="flip-ebook-aspect flip-ebook-aspect--pageflip">
                <!-- PDF.js + PageFlip 會在此產生頁面 -->
                <div id="my-flipbook"></div>
            </div>
        </div>
    </div>

    <p class="ebook-back-link content-container">
        <a href="../index.html#story" class="btn">回到首頁 · 傳奇的轉折</a>
        <a href="totoga2-video.html" class="btn">節目影片（另頁）</a>
        <a href="totoga2-copy-timeline.html" class="btn">時間軸＋八章（另頁）</a>
    </p>

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    <script src="../assets/js/particles.js"></script>
    <script src="../assets/js/portal-nav.js"></script>
    <!-- 1. 引入 PDF.js 核心庫 -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js"></script>
    <!-- 2. 引入 PageFlip -->
    <script src="https://cdn.jsdelivr.net/npm/page-flip/dist/js/page-flip.browser.js"></script>
    <script>
        pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js';

        /** 專案內實際存在的 PDF（原 totoga2/ebook/totoga2_ebook.pdf 尚未建檔） */
        var EBOOK_PDF_URL = '../assets/images/totoga2/totoga2.pdf';

        function showEbookError(message) {
            var box = document.getElementById('my-flipbook');
            if (!box) return;
            box.innerHTML = '<p class="ebook-pdf-error" role="alert">' + message + '</p>';
        }

        async function initEbook(pdfUrl) {
            var container = document.getElementById('my-flipbook');
            if (!container) throw new Error('找不到 #my-flipbook');
            if (typeof pdfjsLib === 'undefined') throw new Error('PDF.js 未載入');
            if (typeof St === 'undefined' || !St.PageFlip) throw new Error('PageFlip（St.PageFlip）未載入');

            var loadingTask = pdfjsLib.getDocument(pdfUrl);
            var pdf = await loadingTask.promise;

            /* 第 1 頁為封面；內文比例以第 2 頁為準（與 PageFlip showCover 一致） */
            var sizePageIndex = pdf.numPages >= 2 ? 2 : 1;
            var sizePage = await pdf.getPage(sizePageIndex);
            var natural = sizePage.getViewport({ scale: 1 });
            var shell = document.querySelector('.flip-ebook-shell');
            var maxW = Math.min((shell && shell.clientWidth) || 1000, 1000) - 8;
            var pageW = Math.max(320, Math.floor(maxW));
            var pageH = Math.floor(pageW * (natural.height / natural.width));
            var maxH = Math.floor(window.innerHeight * 0.72);
            if (pageH > maxH) {
                pageH = maxH;
                pageW = Math.floor(pageH * (natural.width / natural.height));
            }
            var renderScale = (pageW / natural.width) * Math.min(window.devicePixelRatio || 1, 2);

            for (var i = 1; i <= pdf.numPages; i++) {
                var page = await pdf.getPage(i);
                var viewport = page.getViewport({ scale: renderScale });

                var canvas = document.createElement('canvas');
                var context = canvas.getContext('2d');
                canvas.height = viewport.height;
                canvas.width = viewport.width;

                await page.render({ canvasContext: context, viewport: viewport }).promise;

                var pageElement = document.createElement('div');
                pageElement.className = 'page';
                if (i === 1) {
                    pageElement.setAttribute('data-density', 'hard');
                } else if (i === pdf.numPages) {
                    pageElement.setAttribute('data-density', 'hard');
                }
                pageElement.appendChild(canvas);
                container.appendChild(pageElement);
            }

            var pageFlip = new St.PageFlip(container, {
                width: pageW,
                height: pageH,
                size: 'stretch',
                // PDF 每個 page 本身已是「A4*2 的攤開幅面」；避免 StPageFlip 在橫向模式下把頁寬視為總寬一半
                // 導致看起來像把兩頁攤在一起、寬度被切半。
                usePortrait: true,
                showCover: true,
                startPage: 0,
                drawShadow: true,
                maxShadowOpacity: 0.4
            });
            pageFlip.loadFromHTML(document.querySelectorAll('#my-flipbook .page'));
        }

        initEbook(EBOOK_PDF_URL).catch(function (err) {
            console.error(err);
            showEbookError(
                '電子書 PDF 無法載入或翻頁初始化失敗。若用本機直接開檔案（file://），請改由本機伺服器開啟；並確認路徑存在：<code>'
                + EBOOK_PDF_URL + '</code>'
            );
        });
    </script>

</body>

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