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occam.vim
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" 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