PDF

ask_user(questions=[{
  "question": "PDF 样式偏好？",
  "options": [
    "精调样式，走 HTML 渲染，排版最好 (Recommended)",
    "快速一发，pandoc 默认样式就够"
  ]
}])

pandoc INPUT.md -o OUTPUT.pdf \
    --pdf-engine=xelatex \
    -V CJKmainfont='PingFang SC' \
    -V fontsize=12pt \
    -V linestretch=1.4 \
    -V geometry:margin=2cm

<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>标题</title>
<style>
  @page { size: A4; margin: 2cm; }
  body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
    font-size: 12pt; line-height: 1.7; color: #222;
  }
  h1 { color: #1e3c78; border-bottom: 2px solid #1e3c78; padding-bottom: 0.3em; margin-top: 1.5em; }
  h2 { color: #2c5aa0; margin-top: 1.2em; padding-left: 8px; border-left: 4px solid #2c5aa0; }
  code { background: #f4f7fa; padding: 2px 6px; border-radius: 3px; font-family: 'SF Mono', Menlo, monospace; }
  pre { background: #f4f7fa; padding: 12px 16px; border-radius: 6px; overflow-x: auto; }
  table { border-collapse: collapse; width: 100%; margin: 1em 0; }
  th, td { border: 1px solid #ddd; padding: 8px 12px; text-align: left; }
  th { background: #f4f7fa; font-weight: 600; }
  blockquote { border-left: 4px solid #ccc; padding-left: 1em; color: #666; margin-left: 0; }
  .page-break { page-break-before: always; }
</style>
</head>
<body>
  <!-- 内容 -->
</body>
</html>

# /// script
# dependencies = ["reportlab>=4.0"]
# ///
from reportlab.lib.pagesizes import A4
from reportlab.pdfgen import canvas
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont

# 注册 CJK 字体（macOS）
pdfmetrics.registerFont(TTFont('CN', '/System/Library/Fonts/STHeiti Light.ttc'))

c = canvas.Canvas("out.pdf", pagesize=A4)
w, h = A4  # 595 x 842 pt

c.setFont('CN', 24)
c.drawString(50, h - 80, "标题")

c.setFont('CN', 12)
c.drawString(50, h - 120, "正文段落 —— 靠 drawString 精确定位")

# 画线 / 矩形 / 圆
c.line(50, h - 140, w - 50, h - 140)
c.rect(50, h - 200, 200, 40, stroke=1, fill=0)
c.setFillColorRGB(0.9, 0.9, 0.9)
c.rect(50, h - 260, 200, 40, stroke=0, fill=1)

c.showPage()  # 结束当前页
c.save()

# /// script
# dependencies = ["reportlab>=4.0"]
# ///
from reportlab.lib.pagesizes import A4
from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, PageBreak, Table, TableStyle
from reportlab.lib import colors
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont

pdfmetrics.registerFont(TTFont('CN', '/System/Library/Fonts/STHeiti Light.ttc'))

doc = SimpleDocTemplate("report.pdf", pagesize=A4,
                        leftMargin=50, rightMargin=50, topMargin=60, bottomMargin=60)

# 自定义中文样式（默认样式没设 CJK 字体）
styles = getSampleStyleSheet()
cn_title = ParagraphStyle('CNTitle', parent=styles['Title'], fontName='CN', fontSize=22)
cn_body = ParagraphStyle('CNBody', parent=styles['Normal'], fontName='CN', fontSize=11, leading=18)

story = []
story.append(Paragraph("报告标题", cn_title))
story.append(Spacer(1, 20))
story.append(Paragraph("这是正文内容 —— Platypus 会自动分页、换行、对齐。" * 5, cn_body))
story.append(PageBreak())

# 表格
data = [
    ['项目', 'Q1', 'Q2', 'Q3', 'Q4'],
    ['营收', '100', '120', '135', '160'],
    ['利润', '20', '25', '30', '40'],
]
table = Table(data)
table.setStyle(TableStyle([
    ('BACKGROUND', (0, 0), (-1, 0), colors.HexColor('#1e3c78')),
    ('TEXTCOLOR', (0, 0), (-1, 0), colors.whitesmoke),
    ('FONTNAME', (0, 0), (-1, -1), 'CN'),
    ('FONTSIZE', (0, 0), (-1, 0), 13),
    ('ALIGN', (0, 0), (-1, -1), 'CENTER'),
    ('GRID', (0, 0), (-1, -1), 0.5, colors.grey),
    ('BACKGROUND', (0, 1), (-1, -1), colors.HexColor('#f4f7fa')),
]))
story.append(table)

doc.build(story)

Paragraph("H<sub>2</sub>O 和 x<super>2</super>", cn_body)

uv run <scripts_path>/merge_pdfs.py --output merged.pdf a.pdf b.pdf c.pdf

# /// script
# dependencies = ["pypdf>=4.0"]
# ///
from pypdf import PdfReader, PdfWriter

writer = PdfWriter()
for path in ["a.pdf", "b.pdf", "c.pdf"]:
    for page in PdfReader(path).pages:
        writer.add_page(page)
with open("merged.pdf", "wb") as f:
    writer.write(f)

reader = PdfReader("input.pdf")
for i, page in enumerate(reader.pages):
    w = PdfWriter()
    w.add_page(page)
    with open(f"page_{i+1}.pdf", "wb") as f:
        w.write(f)

reader = PdfReader("input.pdf")
writer = PdfWriter()
for page in reader.pages:
    page.rotate(90)  # 90 / 180 / 270
    writer.add_page(page)
with open("rotated.pdf", "wb") as f:
    writer.write(f)

reader = PdfReader("input.pdf")
m = reader.metadata
print(m.title, m.author, m.subject, m.creator)
print(f"页数: {len(reader.pages)}")

# 加密
writer = PdfWriter()
for page in PdfReader("input.pdf").pages:
    writer.add_page(page)
writer.encrypt(user_password="user", owner_password="owner")
with open("encrypted.pdf", "wb") as f:
    writer.write(f)

# 解密
reader = PdfReader("encrypted.pdf")
if reader.is_encrypted:
    reader.decrypt("user")
# 之后正常读

# /// script
# dependencies = ["reportlab>=4.0", "pypdf>=4.0"]
# ///
from reportlab.lib.pagesizes import A4
from reportlab.pdfgen import canvas
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont
from pypdf import PdfReader, PdfWriter

# Step 1: 造水印 PDF
pdfmetrics.registerFont(TTFont('CN', '/System/Library/Fonts/STHeiti Light.ttc'))
c = canvas.Canvas("_wm.pdf", pagesize=A4)
w, h = A4
c.saveState()
c.translate(w / 2, h / 2)
c.rotate(45)
c.setFillColorRGB(0.6, 0.6, 0.6, alpha=0.25)  # 灰色 25% 透明
c.setFont('CN', 60)
c.drawCentredString(0, 0, "CONFIDENTIAL")
c.restoreState()
c.save()

# Step 2: 叠加到每一页
watermark = PdfReader("_wm.pdf").pages[0]
reader = PdfReader("input.pdf")
writer = PdfWriter()
for page in reader.pages:
    page.merge_page(watermark)
    writer.add_page(page)
with open("watermarked.pdf", "wb") as f:
    writer.write(f)