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OneCAD-Draft/crates/ocs_doc_api/ARCHITECTURE.md
T
Hakan Seven 3385160493 Merge PR #1028: add document API with atomic edits
Add the typed document facade and plugin IPC adapter. Prepare bulk edits
before mutation, preserve undo and dirty state, keep profile elevations,
validate numeric inputs and session bindings, and generate Python constructors
with typed results.

Reuse existing entity transforms and profile conversion. Compute mass
properties and closed-surface bounds in cadkernel; pin its main revision
6a5e6fc2822f6af6b2611cd605b44437b35158f0. Keep plugin API metadata at version 6.

Validation: 646 native application tests, 597 kernel tests, 12 document API
tests, 91 plugin API tests, 3 Python tests, default/IPC feature builds and
wasm32 check passed.
2026-09-06 21:43:02 +03:00

1.6 KiB

Document API architecture

DocApi → Document → collections → typed handles builds DTO requests. Transport::apply carries one operation or a read-only query batch to the executor. The native adapter binds each request to its existing HostSession.

The executor validates inputs and dispatches through DocApiBackend. Backends must prepare fallible geometry and serialization before changing the document. Bulk writes prepare all entities, begin one undo record, apply the prepared changes, then finalize once. Cancellation releases a pending undo capture; it is not a rollback mechanism for partially applied writes.

The native adapter reuses scene changes, document history, entity transforms and profile conversion. Solid construction, sweeps, booleans, meshing and mass properties belong to cadkernel. Profile planes preserve their source elevation and orientation. Geometry revisions advance when the scene changes; a compound operation may advance the revision more than once while recording one undo step.

Operation and Query are manually maintained wire enums. Append variants; do not reorder them. The consistency tests verify their bincode discriminants. spec/entities.toml supplies family, constructor and method mappings. build.rs generates the API reference and binding schema. The layout snapshot is curated vocabulary, not a reflected binary codec schema.

To extend the API, update the DTO, backend, executor, facade and spec together, add a native behavior test, and rebuild the generated reference/schema. New backend methods must reject unsupported behavior explicitly.