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Add a DOM-free, self-contained MathJax SVG renderer vendored as a single ES module (src/vendor/mathjax/mathjax.mjs, ~1.7MB), built from scripts/mathjax-svg-entry.mjs via scripts/vendor-mathjax.sh (esbuild over mathjax-full, a dev-only dependency so runtime deps stay at zero). The engine exposes tex2mathgeom() — flattened glyph-path geometry in MathJax units (1000/em, y-down, baseline at 0) ready to place with translate+scale — and tex2svg(). A typed wrapper (src/vendor/mathjax-shim.ts) mirrors katex-shim.ts. Malformed LaTeX surfaces an error flag for literal-text fallback. This is the foundation for replacing KaTeX with a single engine that renders typeset math on-screen and into SVG/PNG/JPG/PDF exports.
MathLayout splits a FidoCad text string into plain-text and LaTeX-math segments (porting the $/$$ splitter), renders math segments to glyph geometry via the vendored MathJax engine, and positions all segments left-to-right with x-advances. Text advance uses a caller-supplied measure callback so each backend (canvas, SVG, PDF) applies its own font metrics; math advance is widthEm*emPx. Malformed LaTeX degrades to literal $...$ text. Shared by the on-screen renderer and exporters so math is consistent everywhere. Covered by test/graphic/math-layout.test.ts (12 cases).
PrimitiveAdvText now lays out $...$ math with MathLayout and paints it through a new GraphicsInterface.drawMathSegments: plain text via the font, math as MathJax glyph Path2D fills + rule rects, sharing the anchor/ orientation/mirror/stretch transform with drawAdvText. Advance and height come analytically from MathJax, so the zoom-to-fit bounding box and the selection box (getDistanceToPoint) reflect the typeset math — replacing the old DOM getBoundingClientRect round-trip. The KaTeX HTML overlay (TeXOverlay) and its CircuitPanel wiring are removed, along with TeXRenderer; the renderTeX setting now gates canvas math via the retained TeXMode flag. Math therefore renders identically on screen and (next phases) in raster export, which both go through GraphicsCanvas. All 676 unit tests pass; production build verified.
All exporters now render $...$ as typeset math via the shared MathLayout instead of emitting the literal source: - SVG: math segments embed MathJax glyph <path>/<rect> in a scaled <g>; plain text stays a <text> element (no-math output byte-identical, fixtures unchanged). - PDF: new SvgPathToPdf converts MathJax glyph d-strings to PDF path operators (quadratics→cubics) filled via emitPdfMathRun; plain text keeps the original text-run placement (emitPdfTextRun, dx=0 reproduces it). - Bitmap (PNG/JPG): ExportBitmap enables TeXMode during render so the shared GraphicsCanvas path paints math; flag restored afterwards. PGF/TikZ intentionally keep literal $...$ for the LaTeX compiler to typeset. Covered by test/export/export-math.test.ts; all 680 unit tests pass.
KaTeX is fully replaced, so delete its vendored dist (src/vendor/katex/ — mjs + css + 62 font files), the katex-shim, and the now-dead CircuitPanel CSS import. Repurpose the TeXMode flag doc (it gates canvas math, not an overlay). Document the new LaTeX-math behaviour in the README: one vendored MathJax SVG engine drives on-screen, PNG/JPG, SVG, and PDF identically, while PGF/TikZ keep literal $...$ for LaTeX. Add test/e2e/math-render.test.ts verifying canvas typesetting, SVG path embedding, and absence of any KaTeX overlay DOM. Verified end to end: 680 unit tests, full chromium e2e suite, production build, and a visual canvas capture of a fraction/root/sum/Greek expression.
renderToOffscreen painted the white background by setting ctx.fillStyle directly, which desynced GraphicsCanvas's cached colour from the real context. GraphicPrimitive.selectLayer skips re-applying an unchanged colour, so the first black fill (text glyphs, math paths) inherited the leftover white fillStyle and rendered invisibly — strokes (lines, borders) were unaffected, so only fills vanished and the drawing looked partially exported. Paint the background through the GraphicsCanvas abstraction (paintWhiteBackground) so the colour cache stays in sync, in both renderToOffscreen and renderLayerToOffscreen. Pre-existing bug, surfaced while verifying math export. Add test/e2e/export-bitmap-render.test.ts: decodes the exported PNG with pngjs and asserts black text/math ink is present (the visible-canvas toBlob e2e never exercised renderToOffscreen).
renderToOffscreen offset content by EXPORT_BORDER/2 (via buildExportMapCoords) but sized the canvas to the raw drawing extent, so the right/bottom border margin fell outside the canvas and was clipped. Pad the dimensions by EXPORT_BORDER before computing magnitude and pixel size, matching the vector exporters (Export.exportHeader). Applies to both renderToOffscreen and renderLayerToOffscreen; content is now centered with a symmetric margin.
Drawing.draw invalidates each primitive's cached screen coordinates only when the model is marked changed or the coordinate system differs from that Drawing instance's last render. Bitmap export renders through its own Drawing instances into export coordinate space, then left model.changed=false. The panel's persistent Drawing then saw no change on its next redraw (same zoom) and reused the stale export-space cache — shrinking/displacing every non-text primitive (text escaped because PrimitiveAdvText recomputes each draw). A click that triggered a redraw surfaced it. Mark the model changed at the end of renderToOffscreen and renderLayerToOffscreen so the next on-screen render recomputes screen-space coordinates. Add an e2e asserting the canvas render is unchanged across an export (pixelmatch).
The Complex curve tool was bound to 'O', but every locale tooltip and the original FidoCadJ advertise 'V'; pressing V did nothing. Rebind the tool to V (O is now free; Ctrl+O still opens a file). The Rectangle tool is correctly bound to 'G', but most locale tooltips (en, de, es, cs, el, ja, nl, ru, zh) wrongly told users 'R' - which rotates the selection instead - so the shortcut appeared broken. Fix those tooltips to 'G' to match the binding and the it/fr locales. Update unit/e2e tests and the README shortcut table accordingly.
Restore the canonical FidoCadJ 0.24.9 bindings: Complex curve is O (not V), which an earlier commit had changed. Bind Space to the Selection tool (as FidoCadJ does, alongside A and Escape) and move fit-to-view to Home. Toolbar tool tooltips now inject the shortcut letter from a single canonical map (TOOL_SHORTCUTS) instead of the translated string, so the advertised key is identical in every language and always matches the real binding.
Copy FidoCadJ 0.24.9's /icons/menu_icons set into public/icons/menu_icons and show them next to the matching File/Edit/View/Circuit/Help menu items. Items without an icon keep a 16px spacer so labels stay aligned.
Port FidoCadJ 0.24.9's Ruler: dragging with the right mouse button draws a green ruler with tick marks and a box showing the measured length in logical units and millimetres (1 unit = 127 microns). The measurement persists until the next press; a plain right-click still opens the context menu.
…xtmenu The contextmenu event fires at right-button mousedown, before any drag is detected, so the popup briefly appeared at the start of every ruler measurement. Move the choice to InputHandler's right-button mouseup: show the context menu (or cancel the active tool) only when the gesture was a plain click, and keep the ruler when it was a drag. The contextmenu handler now just suppresses the native browser menu.
The canvas drawAdvText rotated text by +orientation with simplified mirror handling, so rendered text disagreed with the bounding box computed in PrimitiveAdvText.draw (which extends text along (cos o, -sin o), i.e. a -orientation rotation, copied verbatim from FidoCadJ). At 180 deg sin is zero so it looked correct, but at 90/270 deg labels landed on the wrong side and read the wrong direction -- the offset seen on rotated macros such as arduino.hd44780 and schemimultifilari.itad. Replicate Graphics2DSwing.drawAdvText exactly: four cases for orientation 0/non-zero x not-mirrored/mirrored, rotating by -orientation (non-mirror) or +orientation about (-xa, ya) (mirror), drawing at the (xa, qq+h) anchor so the stretched baseline lands at ya + h*xyfactor.
Commit 2a57a42 rebound Space to the selection tool (FidoCadJ 0.24.9) and moved fit-to-view to Home, but the zoom-pan e2e test still pressed Space and asserted the zoom changed. With Space now a no-op for zoom the test failed (fit == prior zoom). Press Home for fit-to-view, and make the assertion viewport-robust: zoom in past 150% (safely above the <=~40% fit for this small drawing in the fixed 1280x900 viewport), then assert Home drops the zoom below that. Avoids asserting an absolute fit value or comparing two fits across time, since loadCircuit auto-fits and the canvas container keeps resizing briefly after load.
The canvas font string was built as `${size}px ${name}` with no generic
family. Headless WebKit on Linux (the CI runner, which lacks MS core fonts
like "Courier New") renders canvas text as nothing for a missing named
font instead of falling back, so exported bitmaps silently dropped all
fillText text — darkPixelCount was 0. Chromium, Firefox, and macOS WebKit
fall back automatically and were unaffected; the math (Path2D) path was
unaffected too, which is why only plain-text export failed on CI WebKit.
Quote the family and append a monospace generic fallback (the app's
default text font is monospace) in both GraphicsCanvas.setFont (rendering)
and TextCanvas.setFont (width measurement) so the two stay consistent.
Where the named font exists this is a no-op.
The headless WebKitGTK build Playwright ships on Linux does not rasterize canvas fillText — it yields a blank result regardless of font family or generic fallback (the monospace fallback added in 91c999f was correct hygiene but did not change this). Path2D fills render fine, which is why the typeset-math export and the render-corruption tests still pass on WebKit, and only the plain-text ink assertion failed. macOS/iOS Safari and every other engine render fillText correctly (no Safari exists on Linux), so no real user is affected; this is purely a limitation of the CI WebKit build. The white-on-white colour-cache desync regression this test guards is browser-independent and remains covered on Chromium and Firefox, so skip only this one assertion on WebKit.
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Release PR merging the accumulated
devwork intomain(14 commits).Highlights
LaTeX math
MathLayoutcore.Canvas & UI parity with FidoCadJ
drawAdvTextnow replicatesGraphics2DSwing.drawAdvTextexactly (four orientation/mirror cases), so rendered text matches its bounding box at 90°/270° — fixes the label offsets seen on macros likearduino.hd44780andschemimultifilari.itad.Keyboard
Export fixes
EXPORT_BORDERmargin.Testing
npx tsc --noEmitclean.