forked from 1b-agent/opencadstudio-upstream
Sebastian
50db12b169
Per the upstream review of the XDATA-based storage: the host no longer writes its own state into the saved file. The marker record under the host-owned OCS APPID, the on-first-use APPID registration and the verbatim-EED rewrite handling are removed; the single source of truth is a scene-scoped in-memory set of entity handles (Scene::reference_only) that dies with the drawing tab, so a reopened file starts undesignated and the owning plugin re-marks on the document-opened notification. All behaviour sites are unchanged, driven by the set: the wire stamp moves from an XDATA read to a set lookup threaded through the tessellation pipelines (tessellate_entity and the dimension text path take the handle set as a plain parameter), and the pick filters, selection retains and update/erase refusals read Scene::is_reference_only. Undo keeps the entity-write contract: set mutations are recorded as explicit first-touch before/after values on each history delta (the parametric- constraints channel pattern). A designation inside a plugin push_undo scope joins it, a scope-less change is one step of its own, an idempotent re-mark records nothing, erasing a designated entity drops the set entry with the entity, and undo/redo restores entity and designation together. The round-trip test is inverted: reference_only_designation_is_not_written_ to_dwg_or_dxf now asserts the marker appears in neither format's bytes, that no OCS APPID or marker record survives a reload, and that the designation stays live in memory.
