static/style.css was 47,530 lines. It is now nine files under static/css/:
tokens.css holds the :root custom properties, light theme and density classes,
and style-part-01..08 carry the rest in their original order. Nothing was
rewritten; every line moved verbatim and the <link> order in index.html
reproduces the original file byte for byte.
Cut points are brace-depth zero and outside block comments, so no rule or
comment is split. All 47,531 source lines are accounted for across the
fragments.
The computed-style baseline recorded before the split is reproduced exactly,
which is the evidence that the cascade is unchanged rather than an argument
that it should be.
Three things the split broke and this fixes:
- The harness self-test swapped two conflicting .attach-strip blocks inside
style.css to prove the digest is order-sensitive. It rewrote one hardcoded
URL, so with the file gone it silently measured an unmodified page. It now
searches every stylesheet, rewrites whichever holds the pair, and fails
loudly if none does.
- Four tests asserted the cache-bust token by matching /static/style.css?v=.
They check the real invariant now, that every app stylesheet shares one
token with app.js, through stylesheet_cache_version().
- The three panel stylesheets carried their own tokens, so a browser could
hold half an old cascade and half a new one. All app stylesheets now bust
together.
static/style.css no longer holds every rule. 79 rules for the document,
gallery and editor panels now live in static/css/, yet 27 browser tests still
built their synthetic page with a single <link> to style.css, and 51 more read
that one file as though it were the whole cascade. Those tests kept passing
while covering less: a rule that moved became invisible to the assertion that
was meant to pin it.
Python readers now call tests.helpers.stylesheets.app_css(), and synthetic
pages are built from stylesheet_link_tags() so they load exactly what
index.html loads, in the same order. The helper already existed; this moves
the remaining callers onto it.
test_portal_dropdown_z_js parametrised over a file list including style.css to
assert an absence. Checking a negative against one file of a split stylesheet
is how a moved rule escapes, so the CSS case now checks the concatenation.
Two guards keep it from coming back: one fails on any test reading
static/style.css directly, the other on any synthetic page linking it alone.
Both name the helper to use.
No production code changes. Suite is unchanged at 6 pre-existing failures.
Léo