What GUI text editor widget does it use, or is it home-grown?

I don’t see it mentioned.

Fwirt a day ago | parent | next [-]

It uses Scintilla. In fact, at its core, it’s basically just a wrapper around the Scintilla message passing API. There’s a Lua script that parses the Scintilla header files to create the Lua tables that interface with the Scintilla library.

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jrm4 a day ago | parent | prev | next [-]

? Seems to support GTK, Qt and ncurses?

	▲	davidkwast a day ago \| parent [-]
		I saw that in the code on the github repo

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keithnz a day ago | parent | prev | next [-]

looks like it uses scintilla

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a day ago | parent | prev [-]

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