mosaic-terminal/com.jakewharton.mosaic.terminal/Terminal/Capabilities/focusEvents

focusEvents

abstract val focusEvents: Boolean

True when focus events (mode 1004) are supported by this terminal. These are enabled automatically when supported, and will cause State.focused to change.

See: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-FocusIn_FocusOut