# Universal document export The desktop app can export the current document to five formats from **File → Export → …**: | Menu item | Output | Implementation | | --- | --- | --- | | Markdown source… | `.md` | Writes the editor buffer verbatim. | | HTML… | `.html` | Standalone file: `` inlines all active stylesheets (tokens, primitives, icons, katex, renderer); `` clones the current `.mid-preview`. The export is self-contained — opens in any browser without external assets. | | PDF… | `.pdf` | Main process calls `BrowserWindow.webContents.printToPDF({ pageSize: 'A4', printBackground: true })` against the live window. | | Image (PNG)… | `.png` | Renderer rasterizes the `.mid-preview` div via `html-to-image` at 2× pixel ratio, with the active `--mid-bg` for background. | | Plain text… | `.txt` | Strip-markdown pass: removes frontmatter, fence chrome, emphasis markers, link syntax, heading/quote/list markers; keeps the prose. | ## File naming Each export prompts a save dialog. The default filename is the current document's basename + the target extension (e.g. `notes.md` → `notes.pdf`). Untitled buffers default to `document.`. ## DOCX (deferred) The issue body listed DOCX too. Producing a faithful DOCX from arbitrary markdown requires walking the AST and emitting `docx`-package paragraphs/runs/tables/images, which is a substantial standalone feature. Tracked as a follow-up: open a sub-issue when the demand is clear, install `docx`, and wire `mid:export-docx` similarly. ## IPC surface | Channel | From → To | Purpose | | --- | --- | --- | | `mid:save-as` | renderer → main | Generic save dialog + write. Accepts `string` (text) or `ArrayBuffer` (binary). | | `mid:export-pdf` | renderer → main | Save dialog → `webContents.printToPDF()` → write. | | `mid:menu-export` | main → renderer | Menu click ("Markdown source…", "HTML…", etc.) routes through with the format string. | ## Files - `apps/electron/main.ts` — `mid:save-as`, `mid:export-pdf`, "Export" submenu wiring. - `apps/electron/preload.ts` — `saveAs`, `exportPDF`, `onMenuExport`. - `apps/electron/renderer/renderer.ts` — `exportAs`, `markdownToPlainText`, `buildStandaloneHTML`, `defaultExportName`, `dataUrlToArrayBuffer`. ## Verifying Open any markdown file (e.g. `docs/desktop-workspace.md`): - File → Export → Markdown source… → identical to the editor buffer. - Export → HTML — open the saved file in a browser; the rendered page matches the in-app preview, including syntax highlighting and KaTeX. - Export → PDF — A4, multi-page if the document is long; backgrounds preserved. - Export → Image — single tall PNG of the entire preview; theme-aware. - Export → Plain text — markdown markers stripped; prose intact.