Groundwork for un-shelving translations. Chrome's translator rewrites the
rendered DOM directly, wrapping text nodes in <font> elements React has never
heard of, and the next update can then call removeChild against a parent whose
children have moved (facebook/react#11538). This is the structural defence
against that, plus the setting the served language will read from.
The language setting is `uiLanguage`, and it is deliberately not the `locale`
field that already exists. That one is a formatting choice -- what calendar,
clock and numerals to use -- and folding the two together would silently
rewrite everybody's date format the first time they picked a language. German
dates with an English interface is a real preference, and so is the reverse.
It defaults to English when absent, which covers both a new account and every
settings file written before this, and Accept-Language is not consulted: a
served locale should be something the reader chose rather than something
guessed and then written down as though they had. Only languages with strings
shipped are offered, which today means English alone -- a picker entry without
a catalogue behind it would leave the page claiming a language it is not in,
which stops a reader translating a page they cannot read.
`<html lang>` is set where applyTheme is set: at store module load, from the
localStorage cache, before createRoot() has rendered anything. Not in an
effect -- a lang that is briefly wrong is enough to raise the translate prompt
on a page that needed none. There is no server-rendered alternative to reach
for here: ihasmail serves a static shell and holds no account state, and the
settings file lives in the reader's own JMAP Files, so reading it before the
page existed would mean authenticating to Stalwart on every page load. The
static lang="en" in index.html covers the first bytes; the store only ever
corrects a reader who chose otherwise. Both halves are tested.
translate="no" and class="notranslate" go on the narrow boundaries only:
rendered email bodies, raw message source, attachment text, the generated and
hand-edited Sieve, the brand and the login name. Not on <body> -- someone
whose language ihasmail does not speak yet should still be able to translate
the parts that are ours. Email bodies turn out to live in a shadow root, so
React never reconciles them and they were never a crash risk; the marker there
is about not rewriting what a sender actually wrote.
Twenty-four fragile interpolation points were found with the TypeScript
parser rather than grep, and fifteen refactored. Pluralisation and
"count + label" pairs are collapsed into a single expression so the text is a
lone child React updates with textContent, rather than a text node with
conditional siblings to insert around. One of them -- InviteCard's
{method === "REPLY" && organizer ? "" : ""} -- rendered an empty string either
way and is simply gone.
The boundary is scoped to the main content, so the header, folder tree and any
open composer sit outside it and survive independently. It recovers by
remounting the subtree, which costs nothing because everything inside
re-derives from the stores, and it logs at info rather than error: a reader
translating a page is expected and recovered from, and filing it as an error
would put an entry in every console-reading reporter for behaviour that
worked. It re-raises anything that is not a DOM mutation error, so a real bug
still surfaces as one, and it gives up after three attempts rather than
looping invisibly.
Worth recording: the crash could not be reproduced on React 19.2.8. Wrapping
207-249 React-managed text nodes in <font>, exactly as the translator does,
then driving in-place conditional toggles and navigations, left the app intact
with the boundary never firing. The original issue is from React 16 and the
reconciler has changed a great deal since. So this lands as defence whose
premise is weaker than assumed rather than as a fix for something observed
here, and the boundary is insurance rather than a load-bearing part. The
notranslate markers and the collapsed interpolations stand on their own merits
either way.
jcoffey-dev
be1d787b5f