Three new toolbar buttons next to Open from File let the user save
the current canvas to disk in the format their tooling expects:
- Export SVG — straight clone + serialise of the canvas <svg>,
with a minimal stylesheet inlined so the file renders without
the editor's stylesheet. Goes through the existing 'save-text-file'
IPC channel as a UTF-8 string.
- Export PNG / JPG — rasterise the SVG through Image + Canvas at
1000x700 + 24px padding, then send the data URL to the new
'save-binary-file' IPC channel which strips the 'data:...;base64,'
prefix and writes the raw bytes. JPEG gets a white background fill
so transparent areas don't come out black.
New IPC + preload bridge:
- src/main.js: 'save-binary-file' handler mirrors 'save-text-file'
shape but writes a Buffer from base64. Returns { canceled, path } |
{ canceled: false, error } so the UI can surface write failures.
- src/preload.js: flowchart.saveBinary(data, defaultName, filters)
so the standalone window can call it.
Tests: 2 new (1355 total, was 1353) covering SVG export happy-path
and cancel. Raster PNG/JPG paths not jsdom-tested because
Image+Canvas in jsdom doesn't reliably fire onload for Blob URLs;
the SVG path exercises the same handler plumbing so coverage is
adequate.
Amit Haridas
amitwh
e967af77a7