Add support for tmux - #48
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Inside tmux, TERM is usually tmux* or screen*, whose terminfo entries describe cursor keys in keypad transmit mode (kcuu1=\EOA, ...). This library never emits smkx, so tmux actually sends the normal-mode sequences (\E[A, ...): every arrow key ended up misparsed as an Alt combo (KeyEsc + rune '[') and the trailing byte was swallowed. tmux translates keys itself, so the sequences it emits do not depend on the outer terminal: same as screen for Home/End (\E[1~, \E[4~) but with normal-mode cursor keys. Add a dedicated built-in key table, select it whenever $TMUX is set (whatever TERM is), and register tmux/tmux-256color in the built-in and compatibility tables. Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>
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Inside tmux,
TERMis usuallytmux*orscreen*, whose terminfo entries describe cursor keys in keypad transmit mode (kcuu1=\EOA, …). This library never emitssmkx, so tmux actually sends the normal-mode sequences (\E[A, …): every arrow key is misparsed as an Alt combo (KeyEsc+ rune'[') and the trailing byte is swallowed; Home/End/F-keys are garbled the same way.tmux translates keys itself, so what it emits does not depend on the outer terminal (verified empirically with
cat -vinside a pane): same as screen for Home/End (\E[1~,\E[4~) but with normal-mode cursor keys. This adds a dedicated built-in key table, selects it whenever$TMUXis set (whateverTERMis, soTERM=screen*setups are covered too), and registerstmux/tmux-256colorin the built-in and compatibility tables.Tested end-to-end on macOS with tmux 3.5: arrows, Home/End, F1/F5/F12, Insert/Delete, PgUp/PgDn and plain runes are all reported correctly, where master reports Alt-combo garbage.
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