New 'Export Visio' toolbar button sends the current graph to the
main process, which generates an OOXML .vsdx zip with JSZip and
writes it to a user-chosen path. The result is fully editable in
Microsoft Visio, draw.io, Lucidchart, and any other tool that
accepts the format — not an embedded image.
Architecture follows the existing pure-module pattern:
- src/flowchart/flowchart-vsdx-export.js: pure translator that
produces (a) page1.xml describing each node as a Visio Shape
with correct geometry (PinX/PinY/Width/Height in inches, with
the Y-axis flipped to match Visio's bottom-up coords), each
edge as a Connect entry, and (b) the seven static boilerplate
XML files that make a .vsdx zip valid ([Content_Types].xml,
_rels/.rels, visio/document.xml, visio/pages/pages.xml, etc.).
- src/main.js: new 'export-vsdx' IPC handler requires the pure
module + JSZip, builds the zip, writes to disk, returns
{ canceled, path } | { canceled: false, error }.
- src/preload.js: flowchart.exportVsdx(graph) bridge.
- src/renderer/flowchart-bundle.js: btnExportVsdx handler, status
feedback for cancel / save / error paths.
- src/flowchart-generator.html: button next to Export JPG.
Tests: 7 new (1362 total) cover graphBounds (empty / single /
multi-node), XML escaping of label text, Connect emission, the 5
node kinds mapping to 5 distinct master names, and that all
boilerplate files start with the XML declaration.
Amit Haridas
amitwh