# Autoformatting Module
# Provides utilities to make managing filetype-based autoformatters easier
# Usage example:
# autofmt-register rust rustfmt

define-command -docstring %{
	autofmt-register <filetype> <formatcmd>:  Register <formatcmd> as the formatter for <filetype>. Will be automatically enabled and disabled.
} -params 2 \
autofmt-register %{
	declare-option str "formatcmd_%arg{1}" "%arg{2}"
	hook -group "autofmt-%arg{1}" global WinSetOption "filetype=%arg{1}" %{
		autofmt-enable
	}
}

define-command -docstring %{
	autofmt-unregister <filetype>: don't automatically enable autoformatting for <filetype>
} -params 1 autofmt-unregister %{
	remove-hooks global "autofmt-%arg{1}"
}

define-command -docstring %{
	autofmt-disable:  Disable registered formatter for this filetype, for this window
} autofmt-disable %{
	unset-option window formatcmd
	remove-hooks window "autofmt-%opt{filetype}"
}

define-command -docstring %{
	autofmt-enable:  Enable registered formatter for this filetype, for this window
} autofmt-enable %{
	evaluate-commands "set-option window formatcmd %%opt{formatcmd_%opt{filetype}}"
	hook -group "autofmt-%opt{filetype}" window BufWritePre .* %{
		try format-buffer
	}
	hook -group "autofmt-%opt{filetype}" -once -always window WinSetOption filetype=.* %{
		autofmt-disable
	}
}

hook global ModuleLoaded kak %{
	add-highlighter shared/kakrc/code/autofmt regex (?:\s|\A)\Kautofmt-((en|dis)able|(un)?register)(?:(?=\s)|\z) 0:keyword
}