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Current File : //usr/share/vim/vim91/ftplugin/erlang.vim

" Vim ftplugin file
" Language:     Erlang (http://www.erlang.org)
" Maintainer:   Csaba Hoch <csaba.hoch@gmail.com>
" Author:       Oscar Hellström <oscar@oscarh.net>
" Contributors: Ricardo Catalinas Jiménez <jimenezrick@gmail.com>
"               Eduardo Lopez (http://github.com/tapichu)
"               Arvid Bjurklint (http://github.com/slarwise)
"               Paweł Zacharek (http://github.com/subc2)
" Last Update:  2023-Dec-20
" License:      Vim license
" URL:          https://github.com/vim-erlang/vim-erlang-runtime

if exists('b:did_ftplugin')
  finish
endif
let b:did_ftplugin = 1

let s:cpo_save = &cpo
set cpo&vim

let &l:keywordprg = get(g:, 'erlang_keywordprg', 'erl -man')

if get(g:, 'erlang_folding', 0)
  setlocal foldmethod=expr
  setlocal foldexpr=GetErlangFold(v:lnum)
  setlocal foldtext=ErlangFoldText()
endif

setlocal comments=:%%%,:%%,:%
setlocal commentstring=%%s

setlocal formatoptions+=ro

if get(g:, 'erlang_extend_path', 1)
  " typical erlang.mk paths
  let &l:path = join([
        \ 'deps/*/include',
        \ 'deps/*/src',
        \ 'deps/*/test',
        \ 'deps/*/apps/*/include',
        \ 'deps/*/apps/*/src',
        \ &g:path], ',')
  " typical rebar3 paths
  let &l:path = join([
        \ 'apps/*/include',
        \ 'apps/*/src',
        \ '_build/default/lib/*/src',
        \ '_build/default/*/include',
        \ &l:path], ',')
  " typical erlang paths
  let &l:path = join(['include', 'src', 'test', &l:path], ',')

  set wildignore+=*/.erlang.mk/*,*.beam
endif

setlocal suffixesadd=.erl,.hrl

let &l:include = '^\s*-\%(include\|include_lib\)\s*("\zs\f*\ze")'
let &l:define  = '^\s*-\%(define\|record\|type\|opaque\)'

let s:erlang_fun_begin = '^\l[A-Za-z0-9_@]*(.*$'
let s:erlang_fun_end   = '^[^%]*\.\s*\(%.*\)\?$'

if !exists('*GetErlangFold')
  function GetErlangFold(lnum)
    let lnum = a:lnum
    let line = getline(lnum)

    if line =~ s:erlang_fun_end
      return '<1'
    endif

    if line =~ s:erlang_fun_begin && foldlevel(lnum - 1) == 1
      return '1'
    endif

    if line =~ s:erlang_fun_begin
      return '>1'
    endif

    return '='
  endfunction
endif

if !exists('*ErlangFoldText')
  function ErlangFoldText()
    let line    = getline(v:foldstart)
    let foldlen = v:foldend - v:foldstart + 1
    let lines   = ' ' . foldlen . ' lines: ' . substitute(line, "[\ \t]*", '', '')
    if foldlen < 10
      let lines = ' ' . lines
    endif
    let retval = '+' . v:folddashes . lines

    return retval
  endfunction
endif

" The following lines enable the macros/matchit.vim plugin for extended
" matching with the % key.
let b:match_ignorecase = 0
let b:match_words =
  \ '\<\%(begin\|case\|fun\|if\|maybe\|receive\|try\)\>' .
  \ ':\<\%(after\|catch\|else\|of\)\>' .
  \ ':\<end\>,' .
  \ '^\l[A-Za-z0-9_@]*' .
  \ ':^\%(\%(\t\| \{' . shiftwidth() .
  \ '}\)\%([^\t\ %][^%]*\)\?\)\?;\s*\%(%.*\)\?$\|\.[\t\ %]\|\.$'
let b:match_skip = 's:comment\|string\|erlangmodifier\|erlangquotedatom'

let b:undo_ftplugin = "setlocal keywordprg< foldmethod< foldexpr< foldtext<"
      \ . " comments< commentstring< formatoptions< suffixesadd< include<"
      \ . " define<"
      \ . " | unlet b:match_ignorecase b:match_words b:match_skip"

let &cpo = s:cpo_save
unlet s:cpo_save

" vim: sw=2 et

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