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Colby McHenry
8ac0138940
"Copy image" and "Download SVG" on the Flow strip's header and in the Map's side panel. The image is the distribution loop: a flow pasted into a review, a map pasted into a README, read by somebody with no viewer open. The exporter serialises the LAYOUT OBJECT rather than scraping the DOM — no html-to-image, no foreignObject, no new dependency. buildFlowLayout and buildMapLayout already compute every rectangle, port and curve before a component renders, so the image and the screen come from one piece of arithmetic and cannot drift apart, and the whole exporter is a pure function a test runs with no browser. Output is presentation-only SVG (rect, line, path, polygon, text, tspan, clipPath) — no script, no external reference, no data: URL — which is what GitHub's sanitiser accepts in a README. Light theme is forced whatever the viewer is set to: a dark strip on GitHub's white comment background reads as a mistake, not a preference. 24px of paper around the drawing, a caption naming the path or the root at the bottom left, a CodeGraph mark at the bottom right. Fonts travel as family stacks, not bytes (spec). An SVG loaded as an image may not fetch a webfont, so a raster falls back to the platform's own monospace — every fallback in the stack advances at ~0.6em like IBM Plex Mono, so the code grid survives and only the letterforms change. Text is truncated arithmetically with an ellipsis and clipped as well, so a wider fallback cannot spill a source line out of a card. `scale` multiplies only the root width/height while the viewBox stays in CSS pixels, so the raster draws an image whose intrinsic size is already 2x instead of upscaling a 1x bitmap. The clipboard write uses the ClipboardItem promise form (Safari discards the gesture across an await) and falls back to downloading the PNG, saying which happened rather than claiming a copy it did not make. Measured on this repo: execute -> rowToFileRecord (8 hops) exports 3690x253 CSS px, 491 kB PNG at 2x / 38 kB SVG; the 16-module map reproduces the canvas exactly — 16 boxes, 52 links, 9 layer rules, both band labels, and with src/index.ts selected 15 links and 4 dimmed boxes.