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https://gitee.com/kekingcn/file-online-preview.git
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67c6ba3b13
* Optimize LuckyExcel conversion with worker * Fallback LuckyExcel worker errors to main thread
389 lines
12 KiB
Java
389 lines
12 KiB
Java
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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<title>${file.name}预览</title>
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<link rel='stylesheet' href='xlsx/plugins/css/pluginsCss.css' />
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<link rel='stylesheet' href='xlsx/plugins/plugins.css' />
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<link rel='stylesheet' href='xlsx/css/luckysheet.css' />
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<link rel='stylesheet' href='xlsx/assets/iconfont/iconfont.css' />
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<script src="xlsx/plugins/js/plugin.js"></script>
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<script src="xlsx/luckysheet.umd.js"></script>
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<script src="js/watermark.js" type="text/javascript"></script>
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<script src="js/base64.min.js" type="text/javascript"></script>
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</head>
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<#if pdfUrl?contains("http://") || pdfUrl?contains("https://") || pdfUrl?contains("ftp://")>
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<#assign finalUrl="${pdfUrl}">
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<#else>
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<#assign finalUrl="${baseUrl}${pdfUrl}">
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</#if>
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<script>
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/**
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* 初始化水印
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*/
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function initWaterMark() {
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let watermarkTxt = '${watermarkTxt}';
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if (watermarkTxt !== '') {
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watermark.init({
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watermark_txt: '${watermarkTxt}',
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watermark_x: 0,
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watermark_y: 0,
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watermark_rows: 0,
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watermark_cols: 0,
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watermark_x_space: ${watermarkXSpace},
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watermark_y_space: ${watermarkYSpace},
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watermark_font: '${watermarkFont}',
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watermark_fontsize: '${watermarkFontsize}',
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watermark_color: '${watermarkColor}',
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watermark_alpha: ${watermarkAlpha},
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watermark_width: ${watermarkWidth},
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watermark_height: ${watermarkHeight},
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watermark_angle: ${watermarkAngle},
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});
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}
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}
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// 添加加载状态管理
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let isLoading = false;
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</script>
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<style>
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* {
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margin: 0;
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padding: 0;
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}
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html, body {
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height: 100%;
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width: 100%;
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overflow: hidden;
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}
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#loading-overlay {
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position: fixed;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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background: rgba(255, 255, 255, 0.95);
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display: flex;
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justify-content: center;
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align-items: center;
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flex-direction: column;
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z-index: 9999;
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transition: opacity 0.3s ease;
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}
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#loading-progress {
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width: 300px;
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height: 20px;
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background: #f0f0f0;
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border-radius: 10px;
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margin-top: 20px;
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overflow: hidden;
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}
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#loading-bar {
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width: 0%;
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height: 100%;
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background: linear-gradient(90deg, #4CAF50, #8BC34A);
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transition: width 0.3s ease;
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border-radius: 10px;
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}
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.spinner {
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width: 50px;
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height: 50px;
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border: 5px solid #f3f3f3;
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border-top: 5px solid #4CAF50;
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border-radius: 50%;
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animation: spin 1s linear infinite;
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}
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@keyframes spin {
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0% { transform: rotate(0deg); }
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100% { transform: rotate(360deg); }
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}
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.loading-text {
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margin-top: 20px;
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font-size: 16px;
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color: #666;
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}
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.error-message {
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display: none;
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background: #ffebee;
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border: 1px solid #ffcdd2;
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border-radius: 4px;
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padding: 20px;
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margin: 20px;
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text-align: center;
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}
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</style>
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<body>
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<!-- 添加加载遮罩层 -->
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<div id="loading-overlay">
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<div class="spinner"></div>
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<div class="loading-text">正在加载Excel文件...</div>
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<div id="loading-progress">
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<div id="loading-bar"></div>
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</div>
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</div>
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<!-- 错误提示 -->
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<div id="error-message" class="error-message">
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<h3>加载失败</h3>
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<p id="error-detail"></p>
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<button onclick="retryLoad()" style="margin-top: 10px; padding: 8px 16px;">重试</button>
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</div>
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<div id="lucky-mask-demo" style="position: absolute;z-index: 1000000;left: 0px;top: 0px;bottom: 0px;right: 0px; background: rgba(255, 255, 255, 0.8); text-align: center;font-size: 40px;align-items:center;justify-content: center;display: none;">加载中</div>
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<p style="text-align:center;">
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<div id="button-area" style="display: none;">
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<label><button onclick="tiaozhuan()">跳转HTML预览</button></label>
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<button id="confirm-button" onclick="print()">打印</button>
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</div>
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<div id="luckysheet" style="margin:0px;padding:0px;position:absolute;width:100%;left: 0px;top: 20px;bottom: 0px;outline: none;"></div>
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<script src="xlsx/luckyexcel.umd.js"></script>
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<script>
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function tiaozhuan(){
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var test = window.location.href;
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test = test.replace(new RegExp("&officePreviewType=xlsx",("gm")),"");
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test = test+'&officePreviewType=html';
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window.location.href=test;
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}
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var url = '${finalUrl}';
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var kkagent = '${kkagent}';
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var baseUrl = '${baseUrl}'.endsWith('/') ? '${baseUrl}' : '${baseUrl}' + '/';
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if (kkagent === 'true' || !url.startsWith(baseUrl)) {
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url = baseUrl + 'getCorsFile?urlPath=' + encodeURIComponent(Base64.encode(url))+ "&key=${kkkey}";
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}
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let mask = document.getElementById("lucky-mask-demo");
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let loadingOverlay = document.getElementById("loading-overlay");
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let loadingBar = document.getElementById("loading-bar");
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let errorMessage = document.getElementById("error-message");
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// 更新加载进度
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function updateProgress(percent) {
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if (loadingBar) {
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loadingBar.style.width = percent + '%';
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}
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}
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// 显示错误信息
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function showError(message) {
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hideLoading();
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errorMessage.style.display = 'block';
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document.getElementById('error-detail').textContent = message;
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}
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// 隐藏加载动画
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function hideLoading() {
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if (loadingOverlay) {
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loadingOverlay.style.opacity = '0';
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setTimeout(() => {
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loadingOverlay.style.display = 'none';
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document.getElementById('button-area').style.display = 'block';
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}, 300);
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}
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}
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// 重试加载
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function retryLoad() {
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errorMessage.style.display = 'none';
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loadingOverlay.style.display = 'flex';
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loadingOverlay.style.opacity = '1';
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loadTextAsync();
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}
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// 异步加载Excel文件
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async function loadTextAsync() {
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if (isLoading) return;
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isLoading = true;
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updateProgress(10);
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try {
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initWaterMark();
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const value = url;
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const name = '${file.name}';
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if (!value) {
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showError('文件URL为空');
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return;
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}
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updateProgress(30);
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// 使用异步方式加载
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await new Promise(resolve => setTimeout(resolve, 100)); // 给UI更新一点时间
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const exportJson = await transformWithWorker(value, name);
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updateProgress(80);
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await createLuckysheet(exportJson);
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updateProgress(100);
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// 延迟隐藏加载界面，让用户看到加载完成
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setTimeout(() => {
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hideLoading();
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isLoading = false;
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}, 500);
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} catch (error) {
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console.error('加载Excel失败:', error);
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showError('加载失败: ' + error.message);
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isLoading = false;
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}
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}
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function transformWithWorker(value, name) {
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return new Promise((resolve, reject) => {
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updateProgress(50);
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if (!window.Worker) {
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transformOnMainThread(value, name, resolve, reject);
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return;
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}
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let worker;
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try {
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worker = new Worker('xlsx/luckyexcel-worker.js');
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} catch (error) {
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transformOnMainThread(value, name, resolve, reject);
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return;
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}
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let settled = false;
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const fallbackToMainThread = function(error) {
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if (settled) {
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return;
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}
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settled = true;
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worker.terminate();
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if (error) {
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console.warn('Excel Worker转换失败，回退主线程转换:', error);
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}
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transformOnMainThread(value, name, resolve, reject);
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};
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worker.onmessage = function(event) {
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const data = event.data || {};
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if (data.type === 'success') {
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settled = true;
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worker.terminate();
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resolve(data.exportJson);
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return;
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}
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if (data.type === 'error') {
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fallbackToMainThread(data.message || 'Excel转换失败');
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}
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};
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worker.onerror = function(error) {
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fallbackToMainThread(error && error.message ? error.message : error);
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};
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worker.postMessage({
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url: value,
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name: name
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});
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});
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}
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function transformOnMainThread(value, name, resolve, reject) {
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try {
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LuckyExcel.transformExcelToLuckyByUrl(value, name, function(exportJson, luckysheetfile) {
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if (!exportJson || !exportJson.sheets || exportJson.sheets.length === 0) {
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reject(new Error("读取excel文件内容失败!"));
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return;
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}
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resolve(exportJson);
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}, function(error) {
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reject(error);
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});
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} catch (error) {
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reject(error);
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}
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}
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function createLuckysheet(exportJson) {
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return new Promise((resolve, reject) => {
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requestAnimationFrame(() => {
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try {
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window.luckysheet.destroy();
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window.luckysheet.create({
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container: 'luckysheet',
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lang: "zh",
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showtoolbarConfig:{
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image: true,
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print: true,
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exportXlsx: true,
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},
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allowCopy: true, // 是否允许拷贝
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showtoolbar: ${xlsxshowtoolbar?string('true','false')}, // 是否显示工具栏
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showinfobar: true, // 是否显示顶部信息栏
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// myFolderUrl: "/",//作用：左上角<返回按钮的链接
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showsheetbar: true, // 是否显示底部sheet页按钮
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showstatisticBar: true, // 是否显示底部计数栏
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sheetBottomConfig: true, // sheet页下方的添加行按钮和回到顶部按钮配置
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allowEdit: ${(xlsxallowEdit!false)?string('true','false')},// 是否允许前台编辑
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enableAddRow: false, // 允许增加行
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enableAddCol: false, // 允许增加列
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userInfo: false, // 右上角的用户信息展示样式
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showRowBar: true, // 是否显示行号区域
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showColumnBar: false, // 是否显示列号区域
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sheetFormulaBar: false, // 是否显示公式栏
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enableAddBackTop: true,//返回头部按钮
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forceCalculation: false, //下面是导出插件 默认关闭
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data: exportJson.sheets,
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title: exportJson.info.name,
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userInfo: exportJson.info.name.creator,
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// 添加加载完成的回调
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hook: {
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workbookCreateAfter: function() {
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resolve();
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}
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}
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});
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updateProgress(90);
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} catch (err) {
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reject(err);
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}
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});
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});
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}
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// 页面加载完成后开始异步加载
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document.addEventListener('DOMContentLoaded', function() {
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// 延迟一点时间开始加载，确保DOM完全加载
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setTimeout(() => {
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loadTextAsync();
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}, 100);
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});
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// 添加取消加载的功能（按ESC键）
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document.addEventListener('keydown', function(e) {
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if (e.key === 'Escape' && isLoading) {
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// 可以在这里添加取消加载的逻辑
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console.log('用户取消了加载');
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}
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});
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</script>
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</body>
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</html>
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