OpenCADStudio/plugins#901 (comment)
- Add BuiltinPlugin::on_load(&mut self, host: &mut dyn HostApi) with a default
no-op implementation so existing plugins remain source-compatible.
- Invoke on_load once for V4 plugins immediately after the runner connects
and before entering the request loop, giving plugins a HostApi surface to
cache plugin_request_sender() or set up worker threads before any dispatch.
- V2/V3 plugins are unchanged: HostApi is only available during dispatch.
Sync current main and companion codec changes before preserving unsupported frame rows, rendering in the entity plane, and sharing final layout metrics with placement preview.
Change CadModule::ribbon_groups() from -> Vec<RibbonGroup> to -> &[RibbonGroup],
backed by a per-module OnceLock cache. The ribbon group tree is static data
(&'static str, Copy enums) that was being fully reconstructed — Vecs, String
clones, enum discriminants — on every call, including all three per-frame
call sites (view(), dropdown_overlay(), style_combo_overlay()).
- 7 built-in modules + 2 plugin templates cache via function-local OnceLock.
Safe because each is a unit struct with exactly one instance per process
(plugins run in isolated child processes; see PluginProcess::spawn()).
- SharedCadModule avoids the static pattern entirely, storing groups in an
instance field (owned.rs).
- IPC runner converts &RibbonGroup -> OwnedRibbonGroup directly via new
From<&T> impls, avoiding an intermediate clone.
- render_small/render_large and the two make_tool_row closures now borrow
(&RibbonItem, &[ToolDef]) instead of taking ownership, so the view loop
doesn't need to clone items to satisfy the old by-value signatures.
- Various match-ergonomics deref fixes (*id, *default, *icon, etc.) from
the &RibbonItem pattern change.
Hakan Seven