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This commit is contained in:
@@ -2213,102 +2213,122 @@
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requestAnimationFrame(function () {
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requestAnimationFrame(function () {
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try {
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html2canvas(pageEl, {
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scale: 1.5,
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useCORS: true,
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allowTaint: false,
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backgroundColor: "#ffffff",
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scrollX: 0,
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scrollY: 0,
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windowWidth: pageEl.scrollWidth,
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windowHeight: pageEl.scrollHeight,
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onclone: function (clonedDoc, node) {
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var body = clonedDoc.body;
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if (body) {
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body.style.backgroundColor = "#ffffff";
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body.style.overflow = "visible";
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}
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var clonePage = clonedDoc.querySelector(".page");
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if (clonePage) {
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clonePage.style.overflow = "visible";
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clonePage.style.backgroundColor = "#ffffff";
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}
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},
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})
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.then(function (canvas) {
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if (!canvas.width || !canvas.height) {
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console.error("截图为空，宽或高为 0");
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(function () {
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var scale = 1.25;
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var pdf = new jspdf.jsPDF("p", "mm", "a4");
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var pageWidthMm = pdf.internal.pageSize.getWidth();
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var pageHeightMm = pdf.internal.pageSize.getHeight();
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// 以元素宽度为基准，计算每一页对应的像素高度（避免生成超长大图导致 jsPDF 白页）
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var targetWidthPx = Math.max(
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1,
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Math.floor(pageEl.scrollWidth),
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);
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var pageHeightPx = Math.max(
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1,
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Math.floor((targetWidthPx * pageHeightMm) / pageWidthMm),
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);
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var totalHeightPx = Math.max(
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1,
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Math.floor(pageEl.scrollHeight),
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);
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var offsetY = 0;
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var pageIndex = 0;
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function renderSlice() {
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var sliceHeight = Math.min(
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pageHeightPx,
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totalHeightPx - offsetY,
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);
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if (sliceHeight <= 0) {
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// 结束，保存
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var fileName = "企业全景报告.pdf";
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if (
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reportData &&
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reportData.entName &&
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typeof reportData.entName === "string"
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) {
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fileName =
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reportData.entName +
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"_企业全景报告.pdf";
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}
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pdf.save(fileName);
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restoreBtn();
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return;
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}
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// 调试：确认截图是否全白/是否有内容
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try {
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var ctx2d = canvas.getContext("2d");
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if (ctx2d) {
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var p = ctx2d.getImageData(0, 0, 1, 1).data;
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console.info(
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"PDF截图信息",
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{
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w: canvas.width,
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h: canvas.height,
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firstPixel: Array.prototype.slice.call(p),
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},
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html2canvas(pageEl, {
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scale: scale,
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useCORS: true,
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allowTaint: false,
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backgroundColor: "#ffffff",
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x: 0,
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y: offsetY,
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width: targetWidthPx,
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height: sliceHeight,
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scrollX: 0,
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scrollY: 0,
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windowWidth: targetWidthPx,
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windowHeight: sliceHeight,
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onclone: function (clonedDoc) {
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var body = clonedDoc.body;
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if (body) {
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body.style.backgroundColor = "#ffffff";
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body.style.overflow = "visible";
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}
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var clonePage = clonedDoc.querySelector(".page");
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if (clonePage) {
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clonePage.style.overflow = "visible";
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clonePage.style.backgroundColor = "#ffffff";
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}
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},
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})
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.then(function (canvas) {
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if (!canvas.width || !canvas.height) {
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console.error("分片截图为空，宽或高为 0", {
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offsetY: offsetY,
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sliceHeight: sliceHeight,
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});
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restoreBtn();
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return;
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}
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// 调试：输出每页分片信息
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console.info("PDF分片截图信息", {
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page: pageIndex + 1,
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w: canvas.width,
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h: canvas.height,
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offsetY: offsetY,
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sliceHeight: sliceHeight,
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totalHeightPx: totalHeightPx,
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});
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var imgData = canvas.toDataURL("image/jpeg", 0.9);
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if (pageIndex > 0) pdf.addPage();
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pdf.addImage(
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imgData,
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"JPEG",
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0,
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0,
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pageWidthMm,
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pageHeightMm,
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);
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}
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} catch (e) {
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console.warn("读取截图像素失败（可能被跨域资源污染）", e);
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}
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var imgData = canvas.toDataURL(
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"image/jpeg",
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0.95,
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);
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var pdf = new jspdf.jsPDF("p", "mm", "a4");
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var pageWidth = pdf.internal.pageSize.getWidth();
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var pageHeight = pdf.internal.pageSize.getHeight();
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var imgWidth = pageWidth;
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var imgHeight =
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(canvas.height * imgWidth) / canvas.width;
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var position = 0;
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var heightLeft = imgHeight;
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pdf.addImage(
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imgData,
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"JPEG",
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0,
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position,
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imgWidth,
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imgHeight,
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);
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heightLeft -= pageHeight;
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while (heightLeft > 0) {
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position = heightLeft - imgHeight;
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pdf.addPage();
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pdf.addImage(
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imgData,
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"JPEG",
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0,
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position,
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imgWidth,
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imgHeight,
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);
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heightLeft -= pageHeight;
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}
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var fileName = "企业全景报告.pdf";
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if (
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reportData &&
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reportData.entName &&
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typeof reportData.entName === "string"
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) {
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fileName =
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reportData.entName +
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"_企业全景报告.pdf";
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}
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pdf.save(fileName);
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restoreBtn();
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})
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.catch(function (e) {
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console.error("生成 PDF 失败", e);
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restoreBtn();
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});
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pageIndex += 1;
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offsetY += sliceHeight;
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// 给 UI 一点喘息，避免长任务卡死
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setTimeout(renderSlice, 0);
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})
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.catch(function (e) {
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console.error("生成 PDF 失败（分片截图阶段）", e);
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restoreBtn();
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});
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}
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renderSlice();
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})();
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} catch (e) {
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console.error("触发生成 PDF 失败", e);
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restoreBtn();
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