3.6 KiB
Direct scenario editing — bounded implementation plan
Status: implementation in the isolated codex/scenario-direct checkout, based on
ab661f2. Native acceptance is pending the root's Windows/Linux trials. This does
not complete the release or the separate process/chain gesture work.
Decisions
Extend the existing behavior::Scene; retain its derived lifeline columns and
ordered occurrence rows. No model/schema/layout records are added. Lifeline and
occurrence UUIDs remain distinct from represented work and global exchanges.
Select mode selects headers, stems, messages and occurrence boxes. A selected
occurrence has a reorder handle; dragging it chooses a visible slot in its same
parent sequence. It never reparents or changes lifeline columns. A Message tool
uses the existing MessageStyle, with Call + correlated reply initially selected.
Click-click or drag between represented lifelines captures a highlighted explicit
insertion slot (parent, before occurrence or append) and opens the existing
typed draft with those endpoints. Existing exchanges/calls are filtered against
the complete candidate at that slot and shown through search plus 24-item pages.
No compatible exchange produces an actionable retained draft, not a new global
exchange or a silently changed endpoint. Timer remains available as a local tool.
The canvas remains rendered while a bounded, independently scrollable form is open. Values keep the existing qualified-path editor and lifecycle. Final creation uses ordinary CreateElement plus SetSteps in one Batch; paired call/reply are inserted together and undo together. Reordering uses SetSteps within the captured parent. Existing core validation decides reply order, branch dominance, lifetime, phase and endpoint compatibility. Failed preparation/source writes retain drafts.
Transient events capture document/scenario/revision/epoch, and the App validates the current Behavior owner before handling them. Selection does not invalidate a gesture within the same scenario. Escape, unfocus, context/tool change and pending drafts cancel gestures. Ordered pointer events and captured window positions avoid coalesced-click and changed-scroll-origin commits. No geometry is persisted.
Execution bars derive their ends from actual correlated reply positions; separate conditional reply branches render their corresponding spans. Calls without a visible reply use a short explicitly open activation, not a fabricated reply.
Acceptance checks
Production-event tests cover hit priority, click-click/drag, scroll-origin changes,
Escape/unfocus/stale contexts and exactly one result per gesture. Planner/App tests
cover middle/operand insertion, paired identities, complete SetSteps ordering,
same-parent reorder, rejected reply-before-call, unchanged global exchanges, exact
source/model Undo, draft retention and bounded exchange/call controls. Run focused
and full desktop tests, strict all-target desktop Clippy and optimized build with
the dedicated D:/CodexBuilds/Capella2-scenario-target target.
Root native tasks (not yet performed):
- Draw an existing exchange again into the middle of a scenario as Call+Reply; enter a qualified value, select both occurrences, Undo/Redo, save/reopen.
- Insert inside an ALT/LOOP operand, reorder within it, reject a reply before its call, and inspect correlated execution bars and preserved occurrence identities.
- Cancel drawing after scrolling/layout change, retry, retain typed values while navigation is blocked, and open/return from a referenced scenario. Verify at 1440x900 and 1100x700 on Windows and Linux before scoped acceptance.