rastrillo / fiesta Public

fiesta.js: menus, switch drag, touch press and a scheme switch that remembers on a static site

Task 4 of the Fiesta part-1 plan, from rastrillo at SEED, e14b745.

js/fiesta.js is ui/rastrillo.js minus the polling section (poll, its
EventSource push path and the Rastrillo-Fragment and
Rastrillo-Location headers), localPath, scan, start and the cookie
write. Every name the brief told it to keep was where SEED put it:
MENUS, TAIL, menuAround, closeMenus, dismissMenus, the switch drag
(TRACK, settle, unsettle, drop and the five pointer listeners), the
touchstart listener, land() and osScheme. None had moved. The guard
at the top, window.fiestaShim, makes a second copy inert.

The scheme section is new. <html data-rst-scheme-store="local"> is
the ownership signal, read before anything else runs. With it, a
submit in a [rst-scheme] menu stores localStorage["fiesta-scheme"]
as "light" or "dark" and System removes the key; on load, a stored
value is applied to the root when it has no data-theme, so a copy in
<head> without defer restores before first paint, and the matching
button is marked aria-current once the DOM is ready. Without it,
storage is neither read nor written. Either way a submit applies
data-theme in place, lands transitions, moves aria-current, closes
the menu and dispatches CustomEvent("rst-scheme", {bubbles: true,
detail: {scheme}}) from the form. Every storage call is in a
try/catch. Anything but light or dark submits as system, as SEED's
handler treated it, so the key only ever holds a scheme.

fiesta.go lists fiesta.js first in scriptNames, and
TestEveryScriptIsEmbedded's want list follows it (an adapted
preservation assertion: the list is hard-coded there).

check/scripts_test.go, untagged, is TestShimContract and
TestTheLightDismissGateReadsTheMenuList with lightDismissReach from
ui/shim_test.go. The contract test keeps its menu, switch and touch
assertions, drops the polling strings, and replaces the cookie
strings with "rst-scheme", "fiesta-scheme" (both quoted, so the
event name and the key are what is checked), data-rst-scheme-store
and localStorage. The kept assertions passed on their first run
against the stub, SEED's file copied unchanged into js/fiesta.js;
the four replaced ones failed by name on it (F19). Eight new tests
read check/node/fiesta_node.mjs, which runs fiesta.js in a node:vm
context against a stub page (a root with attributes, a document
with listeners, three scheme forms, a counting or throwing storage)
and reports one JSON object. Seven failed by name on the stub:
  TestFiestaJSHasNoServerBehaviour   all five strings present
  TestFiestaJSIsSmall                19434 bytes
  TestFiestaJSIsIdempotent           24 listeners for 12
  TestAStandaloneSubmitStoresTheScheme   stored "", one cookie write
  TestSystemClearsTheStoredScheme    the key stays
  TestABrokenStorageStillSwitches    no rst-scheme event
  TestAServerOwnedSubmitStoresNothing    one cookie write
  TestTheStoredSchemeIsAppliedOnLoad data-theme "" after evaluating
TestAServerOwnedPageIgnoresTheStoredScheme cannot fail on a stub
that never reads storage; its control was a scratch mutation that
dropped the ownership check in stored(): "a server-owned page took
data-theme "dark" from storage" and "read storage 1 times on load",
and TestAServerOwnedSubmitStoresNothing with it. Reverted.

check/scheme_browser_test.go hand-writes the scheme-menu partial's
markup on three pages (schemePages: / standalone, /server without
the attribute, /early with fiesta.js undeferred in <head>), each
ending in an inline script that records data-theme as the body saw
it. driveSchemeRemember(t, rig) is the body of
TestAStandaloneSchemeSurvivesAReload, for Task 12 to drive with the
release's scripts. Against the stub: Dark wrote rastrillo_scheme=dark
and stored nothing; the early page's body saw ""; the standalone
page stored nothing for the server-owned page to ignore. Green
after fiesta.js.

TestTheFixturePageLoadsEveryAsset serves sizingDoc("smoke", "<p>x</p>")
and holds the eight linked assets to 200 with a body, window.fiestaShim
to true, and the harness to no problem. Run before js/fiesta.js
existed: "GET /fiesta.js answered 404" and the harness's 404 report.

The keep list in rig_browser_test.go lost sizingRig and settleUntil,
which the scheme drives call.

fiesta.js is 12,144 bytes, 144 under the cap: 6.4 KB of code and the
rest comment, trimmed from 13,954 by shortening the light-dismiss,
switch and landing paragraphs rather than cutting any of them.

make ci green: gofmt, no-rastrillo, root, staticcheck, govulncheck,
gitleaks, browser.internal.harness, browser.check.

Task 4 of the Fiesta part-1 plan: fiesta.js, the plain-browser half of rastrillo.js, and a scheme that persists, per the task brief and the controller rulings F5, F19 and F21.

Adds js/fiesta.js (SEED rastrillo.js without its server half, plus a localStorage scheme memory behind <html data-rst-scheme-store="local"> and an rst-scheme event), puts it first in ScriptNames, ports TestShimContract and the light-dismiss gate to check/scripts_test.go with eight Node-driven tests through check/node/fiesta_node.mjs, adds three browser drives in check/scheme_browser_test.go with driveSchemeRemember and schemePages for Task 12, and the fixture smoke test TestTheFixturePageLoadsEveryAsset.

driveSchemeRemember(t, rig) expects the rig to serve schemePages(): / standalone, /server without the attribute, /early with fiesta.js undeferred in <head>. The ownership check is the attribute value "local" exactly, not mere presence. rst-scheme is dispatched from the submitted form and bubbles. The keep list in rig_browser_test.go lost sizingRig and settleUntil. fiesta.js sits 144 bytes under its 12 KiB cap.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>