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Solving the Problem of Garbled Characters in PDF Rendering

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This commit is contained in:
马一丁
2025-11-18 14:21:41 +08:00
parent 85d75d6f74
commit 1a302ca975
2 changed files with 53 additions and 4 deletions
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35
ReportEngine/renderers/html_renderer.py
View File

@@ -259,6 +259,10 @@ class HTMLRenderer:
jspdf_tag = f"<script>{jspdf}</script>" if jspdf else '<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js"></script>'
mathjax_tag = f"<script defer>{mathjax}</script>" if mathjax else '<script defer src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>'
# 加载PDF字体数据
pdf_font_data = self._load_pdf_font_data()
pdf_font_script = f"<script>window.pdfFontData = '{pdf_font_data}';</script>" if pdf_font_data else ""
return f"""
<head>
<meta charset="utf-8" />
@@ -282,6 +286,7 @@ class HTMLRenderer:
}};
</script>
{mathjax_tag}
{pdf_font_script}
<style>
{css}
</style>
@@ -2353,6 +2358,7 @@ pre.code-block {{
main {{
box-shadow: none;
margin: 0;
max-width: 100%;
}}
.chapter > *,
.hero-section,
@@ -2364,6 +2370,7 @@ figure,
blockquote {{
break-inside: avoid;
page-break-inside: avoid;
max-width: 100%;
}}
.chapter h2,
.chapter h3,
@@ -2375,18 +2382,37 @@ blockquote {{
.chart-card,
.table-wrap {{
overflow: visible !important;
max-width: 100% !important;
box-sizing: border-box;
}}
.chart-card canvas {{
width: 100% !important;
height: auto !important;
max-width: 100% !important;
}}
.table-wrap {{
overflow-x: auto;
max-width: 100%;
}}
.table-wrap table {{
table-layout: fixed;
width: 100%;
max-width: 100%;
}}
.table-wrap table th,
.table-wrap table td {{
word-break: break-word;
overflow-wrap: break-word;
}}
/* 防止图片和图表溢出 */
img, canvas, svg {{
max-width: 100% !important;
height: auto !important;
}}
/* 确保所有容器不超出页面宽度 */
* {{
box-sizing: border-box;
max-width: 100%;
}}
}}
"""
@@ -2858,6 +2884,9 @@ function exportPdf() {
pdf.addFileToVFS('SourceHanSerifSC-Medium.otf', window.pdfFontData);
pdf.addFont('SourceHanSerifSC-Medium.otf', 'SourceHanSerif', 'normal');
pdf.setFont('SourceHanSerif');
console.log('PDF字体已成功加载');
} else {
console.warn('PDF字体数据未找到，将使用默认字体');
}
} catch (err) {
console.warn('Custom PDF font setup failed, fallback to default', err);
@@ -2890,11 +2919,13 @@ function exportPdf() {
autoPaging: 'text',
windowWidth: pxWidth,
html2canvas: {
scale: Math.min(1.2, Math.max(0.8, pageWidth / (target.clientWidth || pageWidth))),
scale: Math.min(1.5, Math.max(1.0, pageWidth / (target.clientWidth || pageWidth))),
useCORS: true,
scrollX: 0,
scrollY: -window.scrollY,
logging: false
logging: false,
allowTaint: true,
backgroundColor: '#ffffff'
},
pagebreak: {
mode: ['css', 'legacy'],

22
templates/index.html
View File

@@ -3867,6 +3867,22 @@
throw new Error('PDF依赖未加载');
}
const pdf = new jsPDF('p', 'mm', 'a4');
// 添加中文字体支持
try {
const fontData = iframe.contentWindow.pdfFontData || window.pdfFontData;
if (fontData) {
pdf.addFileToVFS('SourceHanSerifSC-Medium.otf', fontData);
pdf.addFont('SourceHanSerifSC-Medium.otf', 'SourceHanSerif', 'normal');
pdf.setFont('SourceHanSerif');
console.log('PDF字体已加载：SourceHanSerif');
} else {
console.warn('PDF字体数据未找到，将使用默认字体');
}
} catch (fontErr) {
console.warn('PDF字体加载失败:', fontErr);
}
const pageWidth = pdf.internal.pageSize.getWidth();
const pxWidth = Math.max(target.scrollWidth || 0, Math.round(pageWidth * 3.78));
const renderTask = pdf.html(target, {
@@ -3877,11 +3893,13 @@
margin: [10, 10, 16, 10],
autoPaging: 'text',
html2canvas: {
scale: Math.min(1.2, Math.max(0.8, pageWidth / (target.clientWidth || pageWidth))),
scale: Math.min(1.5, Math.max(1.0, pageWidth / (target.clientWidth || pageWidth))),
useCORS: true,
scrollX: 0,
scrollY: -iframe.contentWindow.scrollY,
logging: false
logging: false,
allowTaint: true,
backgroundColor: '#ffffff'
},
pagebreak: {
mode: ['css', 'legacy'],