ꦫꦣꦺꦤ꧀ꦄꦤ꧀ꦠꦱꦺꦤ

PATH: usr / share / vim / vim74 / indent

" Vim indent file
" Language:	occam
" Maintainer:	Mario Schweigler <ms44@kent.ac.uk>
" Last Change:	23 April 2003

" Only load this indent file when no other was loaded.
if exists("b:did_indent")
  finish
endif
let b:did_indent = 1

"{{{  Settings
" Set the occam indent function
setlocal indentexpr=GetOccamIndent()
" Indent after new line and after initial colon
setlocal indentkeys=o,O,0=:
"}}}

" Only define the function once
if exists("*GetOccamIndent")
  finish
endif
let s:keepcpo= &cpo
set cpo&vim

"{{{  Indent definitions
" Define carriage return indent
let s:FirstLevelIndent = '^\C\s*$IF\|ALT\|PRI\s\+ALT\|PAR\|SEQ\|PRI\s\+PAR\|WHILE\|VALOF\|CLAIM\|FORKING$\>\|$--.*$\@<!$\<PROC\>\|??\|\<CASE\>\s*\(--.*$\=\_$\)'
let s:FirstLevelNonColonEndIndent = '^\C\s*PROTOCOL\>\|$--.*$\@<!\<$\(CHAN\|DATA$\s\+TYPE\|FUNCTION\)\>'
let s:SecondLevelIndent = '^\C\s*$IF\|ALT\|PRI\s\+ALT$\>\|$--.*$\@<!?\s*\<CASE\>\s*$--.*$\=\_$'
let s:SecondLevelNonColonEndIndent = '$--.*$\@<!\<$CHAN\|DATA$\s\+TYPE\>'

" Define colon indent
let s:ColonIndent = '$--.*$\@<!\<PROC\>'
let s:ColonNonColonEndIndent = '^\C\s*PROTOCOL\>\|$--.*$\@<!\<$\(CHAN\|DATA$\s\+TYPE\|FUNCTION\)\>'

let s:ColonEnd = '$--.*$\@<!:\s*$--.*$\=$'
let s:ColonStart = '^\s*:\s*$--.*$\=$'

" Define comment
let s:CommentLine = '^\s*--'
"}}}

"{{{  function GetOccamIndent()
" Auxiliary function to get the correct indent for a line of occam code
function GetOccamIndent()

" Ensure magic is on
  let save_magic = &magic
  setlocal magic

" Get reference line number
  let linenum = prevnonblank(v:lnum - 1)
  while linenum > 0 && getline(linenum) =~ s:CommentLine
    let linenum = prevnonblank(linenum - 1)
  endwhile

" Get current indent
  let curindent = indent(linenum)

" Get current line
  let line = getline(linenum)

" Get previous line number
  let prevlinenum = prevnonblank(linenum - 1)
  while prevlinenum > 0 && getline(prevlinenum) =~ s:CommentLine
    let prevlinenum = prevnonblank(prevlinenum - 1)
  endwhile

" Get previous line
  let prevline = getline(prevlinenum)

" Colon indent
  if getline(v:lnum) =~ s:ColonStart

let found = 0

while found < 1

if line =~ s:ColonStart
	let found = found - 1
      elseif line =~ s:ColonIndent || (line =~ s:ColonNonColonEndIndent && line !~ s:ColonEnd)
	let found = found + 1
      endif

if found < 1
	let linenum = prevnonblank(linenum - 1)
	if linenum > 0
	  let line = getline(linenum)
	else
	  let found = 1
	endif
      endif

endwhile

if linenum > 0
      let curindent = indent(linenum)
    else
      let colonline = getline(v:lnum)
      let tabstr = ''
      while strlen(tabstr) < &tabstop
	let tabstr = ' ' . tabstr
      endwhile
      let colonline = substitute(colonline, '\t', tabstr, 'g')
      let curindent = match(colonline, ':')
    endif

" Restore magic
    if !save_magic|setlocal nomagic|endif

return curindent
  endif

if getline(v:lnum) =~ '^\s*:'
    let colonline = getline(v:lnum)
    let tabstr = ''
    while strlen(tabstr) < &tabstop
      let tabstr = ' ' . tabstr
    endwhile
    let colonline = substitute(colonline, '\t', tabstr, 'g')
    let curindent = match(colonline, ':')

" Restore magic
    if !save_magic|setlocal nomagic|endif

return curindent
  endif

" Carriage return indenat
  if line =~ s:FirstLevelIndent || (line =~ s:FirstLevelNonColonEndIndent && line !~ s:ColonEnd)
	\ || (line !~ s:ColonStart && (prevline =~ s:SecondLevelIndent
	\ || (prevline =~ s:SecondLevelNonColonEndIndent && prevline !~ s:ColonEnd)))
    let curindent = curindent + &shiftwidth

" Restore magic
    if !save_magic|setlocal nomagic|endif

return curindent
  endif

" Commented line
  if getline(prevnonblank(v:lnum - 1)) =~ s:CommentLine

" Restore magic
    if !save_magic|setlocal nomagic|endif

return indent(prevnonblank(v:lnum - 1))
  endif

" Look for previous second level IF / ALT / PRI ALT
  let found = 0

while !found

if indent(prevlinenum) == curindent - &shiftwidth
      let found = 1
    endif

if !found
      let prevlinenum = prevnonblank(prevlinenum - 1)
      while prevlinenum > 0 && getline(prevlinenum) =~ s:CommentLine
	let prevlinenum = prevnonblank(prevlinenum - 1)
      endwhile
      if prevlinenum == 0
	let found = 1
      endif
    endif

endwhile

if prevlinenum > 0
    if getline(prevlinenum) =~ s:SecondLevelIndent
      let curindent = curindent + &shiftwidth
    endif
  endif

" Restore magic
  if !save_magic|setlocal nomagic|endif

return curindent

endfunction
"}}}

let &cpo = s:keepcpo
unlet s:keepcpo

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