- new src/lib/actions.ts:
- ActionRuntime interface (fps, range, markers, setPlayhead/play/pause,
setButtonState/setButtonDisabled, warn)
- evalAction dispatches each action kind, with clamping to [0, duration]
for time-based jumps and a warning path for unknown markers and for
script actions (DSL lands in slice 8)
- scriptFramesInRange helper returns frames in the open-closed interval
(prev, next], sorted
- store wires it up:
- tick captures prevPlayhead, advances, then fires script frames that
fall in (prev, landed]. Scrubs via setPlayhead never touch this path
so the forward-only guarantee falls out of the architecture.
- actionRuntime() builds an ActionRuntime bound to this store
- setButtonState is a no-op in the editor for now (waits for the
button-runtime slice); setButtonDisabled goes to the store action,
rewindToLoop/play/pause/jumps mutate the store directly
- tests: 10 evaluator tests against a mock ActionRuntime covering all
action kinds + marker map + scriptFramesInRange; 3 integration tests
for tick firing (ordering, no-fire-on-scrub, firing-at-playbackOut)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
thandClaude Opus 4.7
8817a73c3d