File size: 9,423 Bytes
f8b48da | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 | """Rendering shims shared by the corpus generator.
These adapt the ``scripts.corpus_shims`` markdown helpers so they can also
emit PDF (reportlab) and DOCX (python-docx) documents without duplicating
content logic in the generator.
"""
from __future__ import annotations
import re
from pathlib import Path
from typing import Any
from reportlab.lib import colors
from reportlab.lib.pagesizes import A4
from reportlab.lib.styles import ParagraphStyle, getSampleStyleSheet
from reportlab.lib.units import mm
from reportlab.platypus import (
KeepTogether,
Paragraph,
SimpleDocTemplate,
Spacer,
)
HEADING_RE = re.compile(r"^(#{1,6})\s+(.*?)\s*$")
FENCE_RE = re.compile(r"^```")
TABLE_ROW_RE = re.compile(r"^\|.*\|$")
SEP_ROW_RE = re.compile(r"^\|[\s:|-]+\|$")
def _strip_md(text: str) -> str:
"""Strip markdown link/image syntax and inline code for text documents."""
text = re.sub(r"!\[([^\]]*)\]\([^)]*\)", r"\1", text)
text = re.sub(r"\[([^\]]+)\]\([^)]*\)", r"\1", text)
text = re.sub(r"`([^`]*)`", r"\1", text)
text = re.sub(r"\*\*([^*]+)\*\*", r"\1", text)
text = re.sub(r"\*([^*]+)\*", r"\1", text)
return text
def _tables_to_html(md: str) -> str:
"""Convert markdown tables into simple HTML tables (reportlab platypus)."""
lines = md.splitlines()
out: list[str] = []
i = 0
while i < len(lines):
line = lines[i]
if TABLE_ROW_RE.match(line) and i + 1 < len(lines) and SEP_ROW_RE.match(lines[i + 1]):
headers = [c.strip() for c in line.strip("|").split("|")]
rows: list[list[str]] = []
i += 2
while i < len(lines) and TABLE_ROW_RE.match(lines[i]):
rows.append([c.strip() for c in lines[i].strip("|").split("|")])
i += 1
html = ["<table>", "<tr>" + "".join(f"<td><b>{h}</b></td>" for h in headers) + "</tr>"]
for row in rows:
html.append("<tr>" + "".join(f"<td>{_strip_md(c)}</td>" for c in row) + "</tr>")
html.append("</table>")
out.append("\n".join(html))
else:
out.append(line)
i += 1
return "\n".join(out)
def get_title(md: str) -> str:
"""Extract the first level-1 heading from a markdown document."""
for line in md.splitlines():
if HEADING_RE.match(line) and line.startswith("# "):
return _strip_md(HEADING_RE.match(line).group(2).strip())
return "Untitled"
# ---------------------------------------------------------------------------
# PDF rendering
# ---------------------------------------------------------------------------
def render_pdf(md: str, path: Path, *, output_dir: Path) -> Path:
"""Render a markdown document to PDF using reportlab platypus."""
from reportlab.platypus import Frame, NextPageTemplate, PageTemplate # noqa: F401
out_path = output_dir / (path.stem + ".pdf")
out_path.parent.mkdir(parents=True, exist_ok=True)
title = get_title(md)
styles = getSampleStyleSheet()
h1 = ParagraphStyle("h1", parent=styles["Heading1"], fontSize=20, spaceAfter=10 * mm, textColor=colors.HexColor("#0f2a43"))
h2 = ParagraphStyle("h2", parent=styles["Heading2"], fontSize=15, spaceBefore=7 * mm, spaceAfter=4 * mm, textColor=colors.HexColor("#155e94"))
h3 = ParagraphStyle("h3", parent=styles["Heading3"], fontSize=12, spaceBefore=5 * mm, spaceAfter=3 * mm, textColor=colors.HexColor("#1f7a9e"))
body = ParagraphStyle("body", parent=styles["BodyText"], fontSize=10, leading=14, spaceAfter=3 * mm)
code = ParagraphStyle("code", parent=styles["Code"], fontSize=9, leading=12, backColor=colors.HexColor("#f4f4f4"))
note = ParagraphStyle("note", parent=body, textColor=colors.HexColor("#555555"), leftIndent=6 * mm, borderColor=colors.HexColor("#d0d0d0"))
story: list[Any] = []
in_code = False
for line in _tables_to_html(md).splitlines():
if FENCE_RE.match(line):
in_code = not in_code
continue
if in_code:
story.append(Paragraph(_strip_md(line).replace(" ", " "), code))
continue
m = HEADING_RE.match(line)
if m:
level = len(m.group(1))
txt = _strip_md(m.group(2).strip())
style = {2: h2, 3: h3}.get(level, body if level > 3 else h1)
if level == 1:
story.append(KeepTogether([Paragraph(txt, h1)]))
else:
story.append(KeepTogether([Paragraph(txt, style)]))
elif line.startswith("> "):
story.append(Paragraph(_strip_md(line[2:]), note))
elif line.startswith("|"):
pass # handled by _tables_to_html
elif "<table>" in line:
# table html block already emitted
story.append(Spacer(1, 2 * mm))
elif "<tr>" in line:
continue
elif "</table>" in line:
story.append(Spacer(1, 4 * mm))
elif line.startswith("```"):
continue
elif line.strip():
story.append(Paragraph(_strip_md(line), body))
else:
story.append(Spacer(1, 3 * mm))
doc = SimpleDocTemplate(str(out_path), pagesize=A4, leftMargin=18 * mm, rightMargin=18 * mm, topMargin=18 * mm, bottomMargin=18 * mm, title=title)
doc.build(story)
return out_path
# ---------------------------------------------------------------------------
# DOCX rendering
# ---------------------------------------------------------------------------
def render_docx(md: str, path: Path, *, output_dir: Path) -> Path:
"""Render a markdown document to DOCX using python-docx."""
from docx import Document
from docx.shared import Pt
out_path = output_dir / (path.stem + ".docx")
out_path.parent.mkdir(parents=True, exist_ok=True)
document = Document()
document.add_heading(get_title(md), 0)
in_code = False
for line in _tables_to_html(md).splitlines():
import html as html_lib
line = html_lib.unescape(line)
if FENCE_RE.match(line):
in_code = not in_code
continue
if in_code:
p = document.add_paragraph()
run = p.add_run(_strip_md(line))
run.font.name = "Consolas"
run.font.size = Pt(9)
continue
m = HEADING_RE.match(line)
if m:
document.add_heading(_strip_md(m.group(2).strip()), level=min(len(m.group(1)), 4))
elif line.startswith("> "):
p = document.add_paragraph()
run = p.add_run(_strip_md(line[2:]))
run.italic = True
elif line.startswith("|"):
cells = [c.strip() for c in line.strip("|").split("|")]
if SEP_ROW_RE.match(line):
continue
p = document.add_paragraph()
run = p.add_run(" | ".join(_strip_md(c) for c in cells))
run.font.size = Pt(9)
elif "<table>" in line or "</table>" in line or "<tr>" in line:
continue
else:
sentence = _strip_md(line)
if "- " in sentence:
document.add_paragraph(sentence, style="List Bullet")
elif sentence.strip():
document.add_paragraph(sentence)
document.save(str(out_path))
return out_path
# ---------------------------------------------------------------------------
# HTML rendering
# ---------------------------------------------------------------------------
def render_html(md: str, path: Path, *, output_dir: Path) -> Path:
"""Render a markdown document to a standalone HTML file."""
out_path = output_dir / (path.stem + ".html")
out_path.parent.mkdir(parents=True, exist_ok=True)
title = get_title(md)
body_lines: list[str] = []
in_code = False
for line in _tables_to_html(md).splitlines():
if FENCE_RE.match(line):
in_code = not in_code
if not in_code:
body_lines.append("</pre>")
else:
body_lines.append("<pre><code>")
continue
if in_code:
body_lines.append(_html_escape(line))
continue
m = HEADING_RE.match(line)
if m:
level = min(len(m.group(1)), 6)
txt = _strip_md(m.group(2).strip())
body_lines.append(f"<h{level}>{txt}</h{level}>")
elif line.startswith("> "):
body_lines.append(f"<blockquote>{_strip_md(line[2:])}</blockquote>")
elif line.startswith("|"):
pass
elif "<table>" in line or "</table>" in line or "<tr>" in line:
body_lines.append(line)
elif line.strip():
body_lines.append(f"<p>{_strip_md(line)}</p>")
else:
body_lines.append("<br>")
html = (
"<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n<meta charset=\"utf-8\">\n"
f"<title>{title}</title>\n</head>\n<body>\n"
+ "\n".join(body_lines)
+ "\n</body>\n</html>\n"
)
out_path.write_text(html, encoding="utf-8")
return out_path
def _html_escape(text: str) -> str:
import html
return html.escape(text, quote=False) |