Three overlay components each had five `close-*` events (close-save /
close-cancel / close-dismiss / close-dismiss-outside / close-after-fail)
with per-event prewrite arrays setting `data-last-action`. Per the book
§5.3 polymorphism canon, collapse to a single `close` event:
semantic: {
family: 'emerge', verb: 'close', target: ...,
sequence: 'pre', persistence: 'transient',
allowedFamilies: ['emerge', 'commit', 'signal']
}
NO prewrite — the provider sets data-last-action imperatively before
trigger because polymorphic events can't bind a single prewrite per call.
**Provider pattern** (Dialog / Drawer / Popover):
- New `DISMISS_CAUSES` map: { save, cancel, dismiss, dismiss-outside, fail }
→ { lastAction, semantic: { family, verb, intent? } }.
- `dismissWith(action, opts?)` does `dom.apply({ 'data-last-action': cause.lastAction })`
then `runtime.trigger('close', { fallbackTarget, semantic: cause.semantic, message })`.
- `triggerClose` is now private; previously-public 2-arg signature collapsed
into the cause-driven internal helper.
- All internal callsites (escape, outside-click, hover-close, close button)
migrated to `dismissWith`.
- `opts.message` forwarded to runtime — when `a11ySemantic.requiresLiveRegion`
is set (today only for the 'fail' case), the live region announces it.
**Schema validator relaxed** (`src/uix/morfo/schema.ts`): the
"every declared value of `data-last-action.values[]` must be prewritten
by some event" check was DROPPED — provider-imperative writes can't
satisfy it. The reverse direction (`prewritten ⊆ declared`) stays strict.
**Cascade rewrite** (`src/uix/sema/components/{dialog,drawer,popover}.ts`):
- `eventNamePrefix: 'close-'` → `eventName: 'close', eventFamily: 'emerge'`
- `eventName: 'close-dismiss-outside'` → `eventName: 'close', state: {
attr: 'data-last-action', value: 'dismissed-outside' }`
**Eidos CSS**: not touched — already reads `data-last-action` directly.
**Public API preserved**: `dismissWith` signature + observable behaviour
identical. External consumers see no difference.
Tests updated for the new event name. 680/680 pass across sema + morfo +
soma + adom scopes.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>