Ctrl+H took the pending syllable as the query, but the keys typed after
it started a composition of their own: gk, Ctrl+H, s showed 하ㄴ, and r,
Ctrl+H, k showed ㄱㅏ. transstr now composes from a pending text, so
the search goes on where the syllable left off. Escape ended the search
and dropped the syllable it had taken; it puts it back as pending text.
The map is the syllable grammar: a key sequence stays pending only
while it is a prefix of some entry, so a rime the table lacked split
the syllable and a trailing tone key landed on the wrong letter (vowis
gave vơí, rooif rôì, thaays thâý), ua+tone was a valueless prefix that
committed the raw keys (cuar gave cuar, muaf muaf), uyê and ươ typed as
uwow took no coda (nguyễn, được), and ưa toned the a (cửa gave cưả).
Add âu ây êu ôi ơi eo ia ưi ưu uê ươu uây oeo uya uyu, the uyê, uwow,
uê and oe codas, and tone ưa on ư.
server_test, ibus_test and xim_adapter_test each ran their own copy of
the same alt loop that stands in for imthread, and two of them had
private checkstr/checkenginepreedit variants. test_util.c now provides
Pump (trace, optional hold on a chosen op, stop) in its own proc so a
test may block in socket I/O while the engine runs, and test.h declares
the engine hooks once; every .c includes dat.h and fn.h itself as the
rest of the tree does. server_test's three copies of fixture setup and
teardown became serverbegin/serverend.
ko_test and vi_test replayed keys with private copies of transstr's
loop, and test_util reimplemented the shown preedit; the engine exports
impre(Im*, Str*) and transstr() instead, so a change to composition
rules is one edit.
Japanese was never dispatched through the Lang table: dotrans and
transstr both special-cased it into transjp, which edited Im in place
and wrote commits through a side argument, while transko popped and
cleared a pre that every caller overwrote anyway, and Vietnamese kept
its key history in dotrans. Emit now carries the new raw state next to
the new pre; transjp, transko and transvi are pure functions of (Im,
key), and dotrans and transstr have a single path. Vietnamese history
bookkeeping lives in vi.c, where the full-history flush no longer
resets the caret as a side effect; istone was toneidx() >= 0.
