lovstudio:any2pdf

---
name: lovstudio:any2pdf
description: >
license: MIT
---

# any2pdf — Markdown to Professional PDF

This skill converts any Markdown file into a publication-quality PDF using Python's
reportlab library. It was developed through extensive iteration on real Chinese
technical reports and solves several hard problems that naive MD→PDF converters
get wrong.

## When to Use

- User wants to convert `.md` → `.pdf`
- User has a markdown report/document and wants professional typesetting
- Document contains CJK characters (Chinese/Japanese/Korean) mixed with Latin text
- Document has fenced code blocks, markdown tables, or nested lists
- Document has local/remote images, Obsidian callouts, emoji, or math formulas
- User wants a cover page, table of contents, or watermark in their PDF

## Quick Start

```bash
python md2pdf/scripts/md2pdf.py \
  --input report.md \
  --output report.pdf \
  --title "My Report" \
  --author "Author Name" \
  --theme warm-academic
```

All parameters except `--input` are optional — sensible defaults are applied.

## Pre-Conversion Options (MANDATORY)

**IMPORTANT: You MUST use the `AskUserQuestion` tool to ask these questions BEFORE
running the conversion. Do NOT list options as plain text — use the tool so the user
gets a proper interactive prompt. Ask all options in a SINGLE `AskUserQuestion` call.**

Use `AskUserQuestion` with the following template. The tone should be friendly and
concise — like a design assistant, not a config form:

```
开始转 PDF！先帮你确认几个选项 👇

━━━ 📐 设计风格 ━━━
 a) 暖学术    — 陶土色调，温润典雅，适合人文/社科报告
 b) 经典论文  — 棕色调，灵感源自 LaTeX classicthesis，适合学术论文
 c) Tufte     — 极简留白，深红点缀，适合数据叙事/技术写作
 d) 期刊蓝    — 藏蓝严谨，灵感源自 IEEE，适合正式发表风格
 e) 精装书    — 咖啡色调，书卷气，适合长篇专著/技术书
 f) 中国红    — 朱红配暖纸，适合中文正式报告/白皮书
 g) 水墨      — 纯灰黑，素雅克制，适合文学/设计类内容
 h) GitHub    — 蓝白极简，程序员熟悉的风格
 i) Nord 冰霜 — 蓝灰北欧风，清爽现代
 j) 海洋      — 青绿色调，清新自然

━━━ 🖼 扉页图片（封面之后的全页插图） ━━━
 1) 跳过
 2) 我提供本地图片路径
 3) AI 根据内容自动生成一张

━━━ 💧 水印 ━━━
 1) 不加
 2) 自定义文字（如 "DRAFT"、"内部资料"）

━━━ 📇 封底物料（名片/二维码/品牌） ━━━
 1) 跳过
 2) 我提供图片
 3) 纯文字信息

示例回复："a, 扉页跳过, 水印:仅供学习参考, 封底图片:/path/qr.png"
直接说人话就行，不用记编号 😄
```

### Mapping User Choices to CLI Args

| Choice | CLI arg |
|--------|---------|
| Design style a-j | `--theme` with value from table below |
| Frontispiece local | `--frontispiece <path>` |
| Frontispiece AI | Generate image first, then `--frontispiece /tmp/frontispiece.png` |
| Watermark text | `--watermark "文字"` |
| Back cover image | `--banner <path>` |
| Back cover text | `--disclaimer "声明"` and/or `--copyright "© 信息"` |

### Theme Name Mapping

| Choice | `--theme` value | Inspiration |
|--------|----------------|-------------|
| a) 暖学术 | `warm-academic` | Lovstudio design system |
| b) 经典论文 | `classic-thesis` | LaTeX classicthesis |
| c) Tufte | `tufte` | Edward Tufte's books |
| d) 期刊蓝 | `ieee-journal` | IEEE journal format |
| e) 精装书 | `elegant-book` | LaTeX ElegantBook |
| f) 中国红 | `chinese-red` | Chinese formal documents |
| g) 水墨 | `ink-wash` | 水墨画 / ink wash painting |
| h) GitHub | `github-light` | GitHub Markdown style |
| i) Nord | `nord-frost` | Nord color scheme |
| j) 海洋 | `ocean-breeze` | — |

### Handling AI-Generated Frontispiece

If user chose AI generation: read the document title + first paragraphs, use an
image generation tool to create a themed illustration matching the chosen design
style, show for approval, then pass via `--frontispiece /path/to/image.png`

## Architecture

```
Markdown → Preprocess (split merged headings) → Parse (code-fence-aware) → Story (reportlab flowables) → PDF build
```

Key components:
1. **Font system**: Palatino (Latin body), Songti SC (CJK body), Menlo (code) on macOS; auto-fallback on Linux
2. **CJK wrapper**: `_font_wrap()` wraps CJK character runs in `<font>` tags for automatic font switching
3. **Mixed text renderer**: `_draw_mixed()` handles CJK/Latin mixed text on canvas (cover, headers, footers)
4. **Code block handler**: `esc_code()` preserves indentation and line breaks in reportlab Paragraphs
5. **Smart table widths**: Proportional column widths based on content length, with 18mm minimum
6. **Bookmark system**: `ChapterMark` flowable creates PDF sidebar bookmarks + named anchors
7. **Heading preprocessor**: `_preprocess_md()` splits merged headings like `# Part## Chapter` into separate lines
8. **Image handler**: local, relative, `file://`, and remote markdown images are scaled into the body frame with fallback text on errors
9. **Callout renderer**: Obsidian-style `> [!NOTE]` blocks render as themed boxed callouts
10. **Formula renderer**: display formulas use optional matplotlib mathtext images, with styled text fallback
11. **Emoji fallback**: emoji are rendered as cached Twemoji PNGs when available, or with a local emoji font fallback

## Hard-Won Lessons

### CJK Characters Rendering as □

reportlab's `Paragraph` only uses the font in ParagraphStyle. If `fontName="Mono"` but
text contains Chinese, they render as □. **Fix**: Always apply `_font_wrap()` to ALL text
that might contain CJK, including code blocks.

### Code Blocks Losing Line Breaks

reportlab treats `\n` as whitespace. **Fix**: `esc_code()` converts `\n` → `<br/>` and
all spaces → `&nbsp;`, preserving indentation and mid-line alignment before `_font_wrap()`.

### CJK/Latin Word Wrapping

Default reportlab breaks lines only at spaces, causing ugly splits like "Claude\nCode".
**Fix**: Set `wordWrap='CJK'` on body/bullet styles to allow breaks at CJK character boundaries.

### Canvas Text with CJK (Cover/Footer)

`drawString()` / `drawCentredString()` with a Latin font can't render 年/月/日 etc.
**Fix**: Use `_draw_mixed()` for ALL user-content canvas text (dates, stats, disclaimers).

## Configuration Reference

Most options can also be set in top-of-file YAML-style frontmatter. Explicit CLI
arguments take precedence over frontmatter values.

| Argument | Frontmatter Key | Default | Description |
|----------|----------------|---------|-------------|
| `--input` | — | (required) | Path to markdown file |
| `--output` | — | `output.pdf` | Output PDF path |
| `--title` | `title` | From first H1 | Document title for cover page |
| `--subtitle` | `subtitle` | `""` | Subtitle text |
| `--author` | `author` | `""` | Author name |
| `--date` | `date` | Today | Date string |
| `--version` | `version` | `""` | Version string for cover |
| `--watermark` | `watermark` | `""` | Watermark text (empty = none) |
| `--theme` | `theme` | `warm-academic` | Color theme name |
| `--theme-file` | — | `""` | Custom theme JSON file path |
| `--cover` | `cover` | `true` | Generate cover page |
| `--toc` | `toc` | `true` | Generate table of contents |
| `--page-size` | `page-size` | `A4` | Page size (A4 or Letter) |
| `--frontispiece` | `frontispiece` | `""` | Full-page image after cover |
| `--banner` | `banner` | `""` | Back cover banner image |
| `--header-title` | `header-title` | `""` | Report title in page header |
| `--footer-left` | `footer-left` | author | Brand/author in footer |
| `--stats-line` | `stats-line` | `""` | Stats on cover |
| `--stats-line2` | `stats-line2` | `""` | Second stats line |
| `--edition-line` | `edition-line` | `""` | Edition line at cover bottom |
| `--disclaimer` | `disclaimer` | `""` | Back cover disclaimer |
| `--copyright` | `copyright` | `""` | Back cover copyright |
| `--code-max-lines` | `code-max-lines` | `30` | Max lines per code block |

## Themes

Available: `warm-academic`, `nord-frost`, `github-light`, `solarized-light`,
`paper-classic`, `ocean-breeze`.

Each theme defines: page background, ink color, accent color, faded text, border, code background, watermark tint.

## Dependencies

```bash
pip install reportlab --break-system-packages
# Optional formula rendering:
pip install matplotlib --break-system-packages
```

Recommended Ubuntu/Debian fonts:

```bash
sudo apt install fonts-dejavu-core fonts-liberation fonts-freefont-ttf fonts-noto fonts-noto-cjk fonts-noto-color-emoji
```