kakoune/rc/core/commenting.kak

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## Characters that will be used to surround a selection with
decl str-list comment_selection_chars "/*:*/"
## Characters that will be inserted at the beginning of a line to comment
decl str comment_line_chars "//"
def comment-selection -docstring "Comment/uncomment the current selection" %{
%sh{
function exec_proof {
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## Replace the '<' sign that is interpreted differently in `exec`
echo "$@" | sed -r 's,<,<lt>,g'
}
readonly opening=$(exec_proof "${kak_opt_comment_selection_chars%%:*}")
readonly closing=$(exec_proof "${kak_opt_comment_selection_chars##*:}")
if [ -z "${opening}" -o -z "${closing}" ]; then
echo "The \`comment_selection_chars\` variable is empty, couldn't comment the selection" >&2
exit
fi
echo "try %{
## The selection is empty
exec -draft %{<a-K>\A[\h\v\n]*\z<ret>}
try %{
## The selection has already been commented
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exec -draft %{<a-K>\A\Q${opening}\E.*\Q${closing}\E\z<ret>}
## Comment the selection
exec %{a${closing}<esc>i${opening}<esc>${#opening}H}
} catch %{
## Uncomment the commented selection
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exec -draft %{s(\A\Q${opening}\E)|(\Q${closing}\E\z)<ret>d}
}
}"
}
}
def comment-line -docstring "Comment/uncomment the current line" %{
%sh{
readonly opening="${kak_opt_comment_line_chars}"
readonly opening_escaped="\Q${opening}\E"
if [ -z "${opening}" ]; then
echo "The \`comment_line_chars\` variable is empty, couldn't comment the line" >&2
exit
fi
echo "
## Select the content of the line, without indentation
exec %{I<esc><a-l>}
try %{
## There's no text on the line
exec -draft %{<a-K>\A[\h\v\n]*\z<ret>}
try %{
## The line has already been commented
exec -draft %{<a-K>^${opening_escaped}<ret>}
## Comment the line
exec %{i${opening}<esc>${#opening}H}
} catch %{
## Uncomment the line
exec -draft %{s^${opening_escaped}\h*<ret>d}
}
}"
}
}