Hojun-Cho 910bf51347 ipc, srv, gtk: the client's text goes over and a take-back comes back ...

The engine can reach a Hanja reading back into the text the client
already holds, but only if the frontend hands that text over and can
take some of it away again.  GTK 3 has both: retrieve-surrounding
brings the text around the cursor and delete-surrounding removes runes
before it, and a widget that answers neither leaves the text empty, so
nothing is ever reached into or taken from it.

The wire grows a control frame for the text, sent like the caret only
when it changes, and one byte in every response for the runes to take
back.  That byte moves the length fields along, so the version goes to
2: an old daemon and a new module, either way round, fail the handshake
and the module falls through to GtkIMContextSimple rather than misread
a frame.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

2026-08-18 14:31:31 +09:00

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