109 lines
4.0 KiB
Plaintext
109 lines
4.0 KiB
Plaintext
##
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## modeline.kak by lenormf
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##
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## Currently supported modeline format: vim
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## Also supports kakoune options with a 'kak' or 'kakoune' prefix
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## Only a few options are supported, in order to prevent the
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## buffers from poking around the configuration too much
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# Amount of additional lines that will be checked at the beginning
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# and the end of the buffer
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decl int modelines 5
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def -hidden modeline-parse-impl %{
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%sh{
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# Translate a vim option into the corresponding kakoune one
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function translate_opt_vim {
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readonly key="$1"
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readonly value="$2"
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local tr=""
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case "${key}" in
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so|scrolloff) tr="scrolloff ${value},${kak_opt_scrolloff##*,}";;
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siso|sidescrolloff) tr="scrolloff ${kak_opt_scrolloff%%,*},${value}";;
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ts|tabstop) tr="tabstop ${value}";;
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sw|shiftwidth) tr="indentwidth ${value}";;
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tw|textwidth) tr="autowrap_column ${value}";;
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ff|fileformat)
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case "${value}" in
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unix) tr="eolformat lf";;
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dos) tr="eolformat crlf";;
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*) printf %s\\n "echo -debug 'Unsupported file format: ${value}'";;
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esac
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;;
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ft|filetype) tr="filetype ${value}";;
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bomb) tr="BOM utf8";;
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nobomb) tr="BOM none";;
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*) printf %s\\n "echo -debug 'Unsupported vim variable: ${key}'";;
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esac
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[ -n "${tr}" ] && printf %s\\n "set buffer ${tr}"
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}
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# Pass a few whitelisted options to kakoune directly
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function translate_opt_kakoune {
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readonly key="$1"
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readonly value="$2"
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readonly OPTS_ALLOWED=(
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scrolloff
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tabstop
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indentwidth
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autowrap_column
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eolformat
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filetype
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BOM
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)
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printf %s\\n "${OPTS_ALLOWED[@]}" | grep -qw "${key}" || {
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printf %s\\n "echo -debug 'Unsupported kakoune variable: ${key}'";
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return;
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}
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printf %s\\n "set buffer ${key} ${value}"
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}
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# The following subshell will keep the actual options of the modeline, and strip:
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# - the text that leads the first option, according to the official vim modeline format
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# - the trailing text after the last option, and an optional ':' sign before it
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# It will also convert the ':' seperators beween the option=value pairs
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# More info: http://vimdoc.sourceforge.net/htmldoc/options.html#modeline
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options=(
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$(printf %s\\n "${kak_selection}" | sed \
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-e 's/^[^:]\{1,\}://' \
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-e 's/[ \t]*set\{0,1\}[ \t]//' \
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-e 's/:[^a-zA-Z0-9_=-]*$//' \
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-e 's/:/ /g')
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)
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case "${kak_selection}" in
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*vi:*|*vim:*) type_selection="vim";;
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*kak:*|*kakoune:*) type_selection="kakoune";;
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*) echo "echo -debug Unsupported modeline format";;
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esac
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[ -n "${type_selection}" ] || exit 1
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for option in "${options[@]}"; do
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name_option="${option%%=*}"
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value_option="${option#*=}"
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case "${type_selection}" in
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vim) tr=$(translate_opt_vim "${name_option}" "${value_option}");;
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kakoune) tr=$(translate_opt_kakoune "${name_option}" "${value_option}");;
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esac
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[ -n "${tr}" ] && printf %s\\n "${tr}"
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done
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}
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}
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# Add the following function to a hook on BufOpenFile to automatically parse modelines
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# Select the first and last `modelines` lines in the buffer, only keep modelines
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def modeline-parse -docstring "Read and interpret vi-format modelines at the beginning/end of the buffer" %{
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try %{ eval -draft %{
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exec \%s\`|.\'<ret> %opt{modelines}k <a-x> %opt{modelines}X \
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s^[^\s]+?\s(vim?|kak(oune)?):\s?[^\n]+<ret>
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eval -draft -itersel modeline-parse-impl
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} }
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}
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