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" vim: set sw=4 sts=4:
" Maintainer : Gergely Kontra <kgergely@mcl.hu>
" Revised on : 2002.02.18. 23:34:05
" Language : Erlang
" 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=GetErlangIndent()
setlocal indentkeys=
"setlocal indentkeys+=0%,-,0;,>,0)
" Only define the function once.
if exists("*GetErlangIndent")
finish
endif
let s:functiondef ='^\s*[a-zA-Z][a-zA-Z0-9_]*\s*(.*)\s*\%(when.*\)\?\s*->'
let s:fundef ='\<fun\>\s*(.*)\s*\%(when.*\)\?\s*->'
let s:blockbeg='\<case\>\s.*\s\<of\>\|\<receive\>\|\<if\>\|\<try\>\|\<fun\>'
let s:blockend='\(end\)'
let s:beflet = '^\s*\(initializer\|method\|try\)\|\(\<\(begin\|do\|else\|in\|then\|try\)\|->\|;\|(\)\s*$'
" Indent pairs
function s:FindPair(pstart, pmid, pend)
call search(a:pend+1, 'bW')
return indent(searchpair(a:pstart, a:pmid, a:pend, 'bWn'))
", 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"'))
endfunction
function s:FindAround(pstart, pmid, pend)
return indent(searchpair(a:pstart, a:pmid, a:pend, 'bWn'))
", 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"'))
endfunction
function! GetErlangIndent()
" 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)
" This line is %% or %%% comment -> use no comment
if line =~ '^\s*%%'
retu 0
endif
" Previous line was comment -> use previous line's indent
if pline =~ '^\s*%'
retu ind
endif
" Check for clause head on previous line
if line =~ s:functiondef
let ind = 0
retu int
endif
" " indent fun-s
" if pline =~ s:fundef
" let ind = ind + &sw
" endif
if line =~ 'after'
return s:FindAround('receive', '', 'end')
endif
" if pline =~ s:blockbeg
" " keep case, receive match clauses at same level
" retu ind
" endif
if line =~ '-1>'
let ind = ind + &sw
endif
if pline =~ '->'
let ind = ind + &sw
endif
if line =~ 'end\s*)\s*[,;\.]'
return s:FindAround(s:blockbeg, '', 'end')
endif
if line =~ 'end\s*[,;\.]'
" echo "kuku"
return s:FindAround(s:blockbeg, '', 'end')
endif
if pline =~ '[;\.]\s*\(%.*\)\?$'
let ind = ind - &sw
endif
return ind
endfunction
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