lov-any2pdf

# PDF大师 · PDF Master 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. ## Triggers ### Activate when - 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 ### Do not activate when - The user only wants to revise Markdown content and does not need a PDF output. - The source is HTML, DOCX, or another format and the user has not authorized a Markdown conversion step. - The user needs a slide deck, editable Word document, or image export rather than a PDF. ## Quick Start ```bash python md2pdf/scripts/md2pdf.py \ --input report.md \ --output report.pdf \ --title "My Report" \ --author "Author Name" ``` All parameters except `--input` are optional. When no theme is supplied, the renderer selects one from the document's content and structure. ## Configuration Resolution (MANDATORY) Do not present a full configuration form before every conversion. Resolve each setting independently in this order: 1. the user's explicit instruction in the current request, then CLI arguments or document frontmatter; 2. the user's last explicitly confirmed value from the `lov_any2pdf` preference namespace; 3. a content-aware decision for the theme, or the documented safe default for non-visual settings. Proceed without asking when this resolves the conversion. Ask at most one concise question only when an unresolved choice would materially change the result, such as a missing local asset path or permission to generate a new image. Do not ask the user to choose from every theme unless they explicitly request the theme catalog. After the user explicitly confirms or changes a reusable parameter, record that value as the latest preference. Reuse it next time when the user is silent. Never persist an inferred value as though the user confirmed it, and honor requests to reset or ignore saved preferences. Reusable parameters include theme, cover/TOC, page size, frontispiece mode, watermark text and geometry, image-cover mode, back-cover mode/banner, disclaimer, copyright, header, and footer. Revalidate saved file paths before use; if an asset no longer exists, ask for a replacement instead of silently substituting one. ### Content-Aware Theme Decision When neither the current request nor the saved preferences specify a theme, read the title, opening, headings, document length, code blocks, tables, imagery, and publishing context, then select the theme that best serves the article. The following are decision cues, not a fixed keyword router: | Content character | Good starting theme | |-------------------|---------------------| | Long Chinese prose, knowledge notes, dense tables | `songti-reading` | | Strategy, business, market, or research report | `consulting-navy` | | Academic paper with abstract/method/results/references | `ieee-journal` or `classic-thesis` | | Code-heavy technical guide or API documentation | `github-light` | | Data narrative with charts and metrics | `tufte` | | Literary, art, photography, or design essay | `ink-wash` | | Formal Chinese policy or institutional document | `chinese-red` | | Neutral English prose or print-first document | `paper-classic` | `warm-academic` remains available when its tone genuinely fits the article, but it is never the default merely because the user omitted a style. ### Mapping User Choices to CLI Args | Choice | CLI arg | |--------|---------| | Design style | `--theme` with value from table below (`latex-clean` uses pandoc engine) | | Frontispiece local | `--frontispiece <path>` | | Frontispiece AI | Generate image first, then `--frontispiece /tmp/frontispiece.png` | | Watermark text | `--watermark "文字"` | | Watermark style | `--wm-size 30 --wm-opacity 0.1 --wm-angle 45` (all optional) | | Image as cover | `--image-cover true` (requires `--frontispiece`) | | Back cover image | `--banner <path>` | | Back cover text | `--disclaimer "声明"` and/or `--copyright "© 信息"` | ### Theme Name Mapping | Style | `--theme` value | Inspiration | |-------|----------------|-------------| | 暖学术 | `warm-academic` | Warm editorial-academic palette | | 经典论文 | `classic-thesis` | LaTeX classicthesis | | Tufte | `tufte` | Edward Tufte's books | | 期刊蓝 | `ieee-journal` | IEEE journal format | | 精装书 | `elegant-book` | LaTeX ElegantBook | | 中国红 | `chinese-red` | Chinese formal documents | | 水墨 | `ink-wash` | 水墨画 / ink wash painting | | GitHub | `github-light` | GitHub Markdown style | | Nord | `nord-frost` | Nord color scheme | | 海洋 | `ocean-breeze` | Clean teal editorial palette | | LaTeX 清爽 | `latex-clean` | pandoc+XeLaTeX 原生排版，无封面 | | 咨询深蓝 | `consulting-navy` | Consulting research reports | | 宋黑阅读 | `songti-reading` | 中文出版物常见的宋体正文 + 黑体标题层级 | ### 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 Regular (CJK body), selectable serif/sans CJK emphasis, Menlo (code) on macOS; auto-fallback on Linux/Windows 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, mid-line alignment, 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. ### Songti Reading Needs a Sans Hierarchy Using one sans family everywhere gives dense Chinese reports a uniform dark texture, while using Songti everywhere weakens headings and table headers. **Fix**: use the `songti-reading` theme for Songti SC Regular body text, Palatino Latin prose, sans-serif Chinese headings/emphasis, Menlo code, wider leading, and serif table bodies. Keep this as an explicit theme rather than silently changing every report. On macOS, `Songti.ttc` index 0 is Songti SC Black, not Regular. The readable face is index 6. Common report symbols such as `✓`, `✗`, and `→` need an explicit symbol-font fallback or they may render as `□` even when the surrounding Chinese is correct. ### 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). ### Images Silently Dropped (Relative Paths) An image reference to `charts/chart_01.png` in a markdown file used to get skipped without warning because the image path was resolved against the current working directory, not the markdown's directory. **Fix**: `main()` now passes `input_dir` (the .md's directory) into the builder, and the image handler resolves relative paths against it. Missing images now also emit a `WARN: image not found: ...` to stderr instead of silently dropping. ### Multi-Line Image References (pandoc `--wrap=auto`) When feeding pandoc's output into md2pdf, pandoc's default `--wrap=auto` (72 cols) wraps long image references to paths such as `path.png` across multiple lines, which defeated the single-line image regex. **Fix**: `_preprocess_md()` now collapses multi-line image references into one line (outside code fences) before parsing. **Pipeline tip:** If you're piping HTML → markdown via pandoc, use `pandoc --wrap=none input.html -o output.md` to avoid wrap-related parsing issues for images and tables alike. ## Input Format This skill takes **Markdown files only** as input. If you have HTML, DOCX, or other formats, convert them to markdown first (e.g. `pandoc --wrap=none`). Embedded HTML blocks in markdown are passed through as text — pre-process any visual content (charts, complex tables) into plain markdown tables or image references before invoking md2pdf. ## 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` | content-aware `auto` | Color theme name; explicit and saved preferences take precedence | | `--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` | bundled `assets/backcover-banner.jpg` | Back cover banner image (pass `none` to disable) | | `--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 | | `--image-cover` | `image-cover` | `false` | Use frontispiece as full-bleed cover (page 1), text cover becomes page 2 | | `--heading-top-spacer` | `heading-top-spacer` | `5` | Top spacer before H1/H2 chapter titles in mm | | `--wm-size` | `wm-size` | auto (half page width) | Watermark font size; auto-scales so text width ≈ 50% of page width | | `--wm-opacity` | `wm-opacity` | `0.1` | Watermark opacity (0.0–1.0) | | `--wm-angle` | `wm-angle` | `35` | Watermark rotation angle in degrees | | `--wm-spacing-x` | `wm-spacing-x` | `9999` | Watermark horizontal spacing in pt (≥2000 = single centered per page) | | `--wm-spacing-y` | `wm-spacing-y` | `9999` | Watermark vertical spacing in pt (≥2000 = single centered per page) | ## Themes Available: `songti-reading`, `warm-academic`, `nord-frost`, `github-light`, `solarized-light`, `paper-classic`, `ocean-breeze`, `monokai-warm`, `dracula-soft`, `tufte`, `classic-thesis`, `ieee-journal`, `elegant-book`, `chinese-red`, `ink-wash`, and `consulting-navy`. Each theme defines: page background, ink color, accent color, faded text, border, code background, watermark tint. ## Fallback: pandoc + XeLaTeX When reportlab fails (e.g. wide/complex tables cause infinite loops in table width calculation), fall back to pandoc with XeLaTeX. This produces high-quality CJK PDFs with proper table handling. ### When to use pandoc engine - User chose `latex-clean` theme (k) — pandoc is the primary engine, not a fallback - Document has many wide multi-column tables (reportlab's table layout may hang) - Document needs LaTeX-quality typesetting (justified text, hyphenation) - reportlab md2pdf.py hangs or crashes on the input ### Basic command pandoc input.md -o output.pdf \ --pdf-engine=xelatex \ -V CJKmainfont="Songti SC" -V mainfont="Palatino" -V monofont="Menlo" \ -V geometry:margin=2.5cm -V fontsize=11pt \ --toc -V toc-title="目录" -V documentclass=article ### Adding watermark + headers/footers pandoc input.md -o output.pdf \ --pdf-engine=xelatex \ -V CJKmainfont="Songti SC" -V mainfont="Palatino" -V monofont="Menlo" \ -V geometry:margin=2.5cm -V fontsize=11pt \