neovim/runtime/indent/prolog.vim
Justin M. Keyes a98a6996c2 re-integrate runtime/ vim-patch:0 #938
Vim runtime files based on 7.4.384 / hg changeset 7090d7f160f7

Excluding:
  Amiga icons (*.info, icons/)
  doc/hangulin.txt
  tutor/
  spell/
  lang/ (only used for menu translations)
  macros/maze/, macros/hanoi/, macros/life/, macros/urm/
      These were used to test vi compatibility.
  termcap
      "Demonstration of a termcap file (for the Amiga and Archimedes)"

Helped-by: Rich Wareham <rjw57@cam.ac.uk>
Helped-by: John <john.schmidt.h@gmail.com>
Helped-by: Yann <yann@yann-salaun.com>
Helped-by: Christophe Badoit <c.badoit@lesiteimmo.com>
Helped-by: drasill <github@tof2k.com>
Helped-by: Tae Sandoval Murgan <taecilla@gmail.com>
Helped-by: Lowe Thiderman <lowe.thiderman@gmail.com>
2014-07-29 02:12:31 +00:00

59 lines
1.4 KiB
VimL

" vim: set sw=4 sts=4:
" Maintainer : Gergely Kontra <kgergely@mcl.hu>
" Revised on : 2002.02.18. 23:34:05
" Language : Prolog
" TODO:
" checking with respect to syntax highlighting
" ignoring multiline comments
" detecting multiline strings
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
setlocal indentexpr=GetPrologIndent()
setlocal indentkeys-=:,0#
setlocal indentkeys+=0%,-,0;,>,0)
" Only define the function once.
"if exists("*GetPrologIndent")
" finish
"endif
function! GetPrologIndent()
" 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 clause head on previous line
if pline =~ ':-\s*\(%.*\)\?$'
let ind = ind + &sw
" Check for end of clause on previous line
elseif pline =~ '\.\s*\(%.*\)\?$'
let ind = ind - &sw
endif
" Check for opening conditional on previous line
if pline =~ '^\s*\([(;]\|->\)'
let ind = ind + &sw
endif
" Check for closing an unclosed paren, or middle ; or ->
if line =~ '^\s*\([);]\|->\)'
let ind = ind - &sw
endif
return ind
endfunction