view runtime/indent/logtalk.vim @ 16736:426bf8101214 v8.1.1370

patch 8.1.1370: not using the new github feature for donations commit https://github.com/vim/vim/commit/05b8b07e2770b66ab77fdb5e195cae809959bdab Author: Bram Moolenaar <Bram@vim.org> Date: Thu May 23 20:42:10 2019 +0200 patch 8.1.1370: not using the new github feature for donations Problem: Not using the new github feature for donations. Solution: Add a Sponsor button. (closes https://github.com/vim/vim/issues/4417)
author Bram Moolenaar <Bram@vim.org>
date Thu, 23 May 2019 20:45:04 +0200
parents 5c5908e81e93
children 5c220cf30f1f
line wrap: on
line source

"  Maintainer:	Paulo Moura <pmoura@logtalk.org>
"  Revised on:	2018.08.04
"  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)

" 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