68 lines
1.9 KiB
VimL
68 lines
1.9 KiB
VimL
" Maintainer: Paulo Moura <pmoura@logtalk.org>
|
|
" Revised on: 2018.08.04
|
|
" 2023 Aug 28 by Vim Project (undo_indent)
|
|
" Language: Logtalk
|
|
|
|
" This Logtalk indent file is a modified version of the Prolog
|
|
" indent file written by Gergely Kontra
|
|
|
|
" Only load this indent file when no other was loaded.
|
|
if exists("b:did_indent")
|
|
finish
|
|
endif
|
|
|
|
let b:did_indent = 1
|
|
|
|
setlocal indentexpr=GetLogtalkIndent()
|
|
setlocal indentkeys-=:,0#
|
|
setlocal indentkeys+=0%,-,0;,>,0)
|
|
|
|
let b:undo_indent = "setlocal indentexpr< indentkeys<"
|
|
|
|
" Only define the function once.
|
|
if exists("*GetLogtalkIndent")
|
|
finish
|
|
endif
|
|
|
|
function! GetLogtalkIndent()
|
|
" Find a non-blank line above the current line.
|
|
let pnum = prevnonblank(v:lnum - 1)
|
|
" Hit the start of the file, use zero indent.
|
|
if pnum == 0
|
|
return 0
|
|
endif
|
|
let line = getline(v:lnum)
|
|
let pline = getline(pnum)
|
|
|
|
let ind = indent(pnum)
|
|
" Previous line was comment -> use previous line's indent
|
|
if pline =~ '^\s*%'
|
|
retu ind
|
|
endif
|
|
" Check for entity opening directive on previous line
|
|
if pline =~ '^\s*:-\s\(object\|protocol\|category\)\ze(.*,$'
|
|
let ind = ind + shiftwidth()
|
|
" Check for clause head on previous line
|
|
elseif pline =~ ':-\s*\(%.*\)\?$'
|
|
let ind = ind + shiftwidth()
|
|
" Check for grammar rule head on previous line
|
|
elseif pline =~ '-->\s*\(%.*\)\?$'
|
|
let ind = ind + shiftwidth()
|
|
" Check for entity closing directive on previous line
|
|
elseif pline =~ '^\s*:-\send_\(object\|protocol\|category\)\.\(%.*\)\?$'
|
|
let ind = ind - shiftwidth()
|
|
" Check for end of clause on previous line
|
|
elseif pline =~ '\.\s*\(%.*\)\?$'
|
|
let ind = ind - shiftwidth()
|
|
endif
|
|
" Check for opening conditional on previous line
|
|
if pline =~ '^\s*\([(;]\|->\)' && pline !~ '\.\s*\(%.*\)\?$' && pline !~ '^.*\([)][,]\s*\(%.*\)\?$\)'
|
|
let ind = ind + shiftwidth()
|
|
endif
|
|
" Check for closing an unclosed paren, or middle ; or ->
|
|
if line =~ '^\s*\([);]\|->\)'
|
|
let ind = ind - shiftwidth()
|
|
endif
|
|
return ind
|
|
endfunction
|