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" Vim indent file
" Language: Scala (http://scala-lang.org/)
" Original Author: Stefan Matthias Aust
" Modifications By: Derek Wyatt
" URL: https://github.com/derekwyatt/vim-scala
" Last Change: 2016 Aug 26
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
setlocal autoindent
setlocal indentexpr=GetScalaIndent()
setlocal indentkeys=0{,0},0),!^F,<>>,o,O,e,=case,<CR>
if exists("*GetScalaIndent")
finish
endif
let s:keepcpo= &cpo
set cpo&vim
let s:defMatcher = '\%(\%(private\|protected\)\%(\[[^\]]*\]\)\?\s\+\|abstract\s\+\|override\s\+\)*\<def\>'
let s:funcNameMatcher = '\w\+'
let s:typeSpecMatcher = '\%(\s*\[\_[^\]]*\]\)'
let s:defArgMatcher = '\%((\_.\{-})\)'
let s:returnTypeMatcher = '\%(:\s*\w\+' . s:typeSpecMatcher . '\?\)'
let g:fullDefMatcher = '^\s*' . s:defMatcher . '\s\+' . s:funcNameMatcher . '\s*' . s:typeSpecMatcher . '\?\s*' . s:defArgMatcher . '\?\s*' . s:returnTypeMatcher . '\?\s*[={]'
function! scala#ConditionalConfirm(msg)
if 0
call confirm(a:msg)
endif
endfunction
function! scala#GetLine(lnum)
let line = substitute(getline(a:lnum), '//.*$', '', '')
let line = substitute(line, '"\(.\|\\"\)\{-}"', '""', 'g')
return line
endfunction
function! scala#CountBrackets(line, openBracket, closedBracket)
let line = substitute(a:line, '"\(.\|\\"\)\{-}"', '', 'g')
let open = substitute(line, '[^' . a:openBracket . ']', '', 'g')
let close = substitute(line, '[^' . a:closedBracket . ']', '', 'g')
return strlen(open) - strlen(close)
endfunction
function! scala#CountParens(line)
return scala#CountBrackets(a:line, '(', ')')
endfunction
function! scala#CountCurlies(line)
return scala#CountBrackets(a:line, '{', '}')
endfunction
function! scala#LineEndsInIncomplete(line)
if a:line =~ '[.,]\s*$'
return 1
else
return 0
endif
endfunction
function! scala#LineIsAClosingXML(line)
if a:line =~ '^\s*</\w'
return 1
else
return 0
endif
endfunction
function! scala#LineCompletesXML(lnum, line)
let savedpos = getpos('.')
call setpos('.', [savedpos[0], a:lnum, 0, savedpos[3]])
let tag = substitute(a:line, '^.*</\([^>]*\)>.*$', '\1', '')
let [lineNum, colnum] = searchpairpos('<' . tag . '>', '', '</' . tag . '>', 'Wbn')
call setpos('.', savedpos)
let pline = scala#GetLine(prevnonblank(lineNum - 1))
if pline =~ '=\s*$'
return 1
else
return 0
endif
endfunction
function! scala#IsParentCase()
let savedpos = getpos('.')
call setpos('.', [savedpos[0], savedpos[1], 0, savedpos[3]])
let [l, c] = searchpos('^\s*\%(' . s:defMatcher . '\|\%(\<case\>\)\)', 'bnW')
let retvalue = -1
if l != 0 && search('\%' . l . 'l\s*\<case\>', 'bnW')
let retvalue = l
endif
call setpos('.', savedpos)
return retvalue
endfunction
function! scala#CurlyMatcher()
let matchline = scala#GetLineThatMatchesBracket('{', '}')
if scala#CountParens(scala#GetLine(matchline)) < 0
let savedpos = getpos('.')
call setpos('.', [savedpos[0], matchline, 9999, savedpos[3]])
call searchpos('{', 'Wbc')
call searchpos(')', 'Wb')
let [lnum, colnum] = searchpairpos('(', '', ')', 'Wbn')
call setpos('.', savedpos)
let line = scala#GetLine(lnum)
if line =~ '^\s*' . s:defMatcher
return lnum
else
return matchline
endif
else
return matchline
endif
endfunction
function! scala#GetLineAndColumnThatMatchesCurly()
return scala#GetLineAndColumnThatMatchesBracket('{', '}')
endfunction
function! scala#GetLineAndColumnThatMatchesParen()
return scala#GetLineAndColumnThatMatchesBracket('(', ')')
endfunction
function! scala#GetLineAndColumnThatMatchesBracket(openBracket, closedBracket)
let savedpos = getpos('.')
let curline = scala#GetLine(line('.'))
if curline =~ a:closedBracket . '.*' . a:openBracket . '.*' . a:closedBracket
call setpos('.', [savedpos[0], savedpos[1], 0, savedpos[3]])
call searchpos(a:closedBracket . '\ze[^' . a:closedBracket . a:openBracket . ']*' . a:openBracket, 'W')
else
call setpos('.', [savedpos[0], savedpos[1], 9999, savedpos[3]])
call searchpos(a:closedBracket, 'Wbc')
endif
let [lnum, colnum] = searchpairpos(a:openBracket, '', a:closedBracket, 'Wbn')
call setpos('.', savedpos)
return [lnum, colnum]
endfunction
function! scala#GetLineThatMatchesCurly()
return scala#GetLineThatMatchesBracket('{', '}')
endfunction
function! scala#GetLineThatMatchesParen()
return scala#GetLineThatMatchesBracket('(', ')')
endfunction
function! scala#GetLineThatMatchesBracket(openBracket, closedBracket)
let [lnum, colnum] = scala#GetLineAndColumnThatMatchesBracket(a:openBracket, a:closedBracket)
return lnum
endfunction
function! scala#NumberOfBraceGroups(line)
let line = substitute(a:line, '[^()]', '', 'g')
if strlen(line) == 0
return 0
endif
let line = substitute(line, '^)*', '', 'g')
if strlen(line) == 0
return 0
endif
let line = substitute(line, '^(', '', 'g')
if strlen(line) == 0
return 0
endif
let c = 1
let counter = 0
let groupCount = 0
while counter < strlen(line)
let char = strpart(line, counter, 1)
if char == '('
let c = c + 1
elseif char == ')'
let c = c - 1
endif
if c == 0
let groupCount = groupCount + 1
endif
let counter = counter + 1
endwhile
return groupCount
endfunction
function! scala#MatchesIncompleteDefValr(line)
if a:line =~ '^\s*\%(' . s:defMatcher . '\|\<va[lr]\>\).*[=({]\s*$'
return 1
else
return 0
endif
endfunction
function! scala#LineIsCompleteIf(line)
if scala#CountBrackets(a:line, '{', '}') == 0 &&
\ scala#CountBrackets(a:line, '(', ')') == 0 &&
\ a:line =~ '^\s*\<if\>\s*([^)]*)\s*\S.*$'
return 1
else
return 0
endif
endfunction
function! scala#LineCompletesIfElse(lnum, line)
if a:line =~ '^\s*\%(\<if\>\|\%(}\s*\)\?\<else\>\)'
return 0
endif
let result = search('^\%(\s*\<if\>\s*(.*).*\n\|\s*\<if\>\s*(.*)\s*\n.*\n\)\%(\s*\<else\>\s*\<if\>\s*(.*)\s*\n.*\n\)*\%(\s*\<else\>\s*\n\|\s*\<else\>[^{]*\n\)\?\%' . a:lnum . 'l', 'Wbn')
if result != 0 && scala#GetLine(prevnonblank(a:lnum - 1)) !~ '{\s*$'
return result
endif
return 0
endfunction
function! scala#GetPrevCodeLine(lnum)
" This needs to skip comment lines
return prevnonblank(a:lnum - 1)
endfunction
function! scala#InvertBracketType(openBracket, closedBracket)
if a:openBracket == '('
return [ '{', '}' ]
else
return [ '(', ')' ]
endif
endfunction
function! scala#Testhelper(lnum, line, openBracket, closedBracket, iteration)
let bracketCount = scala#CountBrackets(a:line, a:openBracket, a:closedBracket)
" There are more '}' braces than '{' on this line so it may be completing the function definition
if bracketCount < 0
let [matchedLNum, matchedColNum] = scala#GetLineAndColumnThatMatchesBracket(a:openBracket, a:closedBracket)
if matchedLNum == a:lnum
return -1
endif
let matchedLine = scala#GetLine(matchedLNum)
if ! scala#MatchesIncompleteDefValr(matchedLine)
let bracketLine = substitute(substitute(matchedLine, '\%' . matchedColNum . 'c.*$', '', ''), '[^{}()]', '', 'g')
if bracketLine =~ '}$'
return scala#Testhelper(matchedLNum, matchedLine, '{', '}', a:iteration + 1)
elseif bracketLine =~ ')$'
return scala#Testhelper(matchedLNum, matchedLine, '(', ')', a:iteration + 1)
else
let prevCodeLNum = scala#GetPrevCodeLine(matchedLNum)
if scala#MatchesIncompleteDefValr(scala#GetLine(prevCodeLNum))
return prevCodeLNum
else
return -1
endif
endif
else
" return indent value instead
return matchedLNum
endif
" There's an equal number of '{' and '}' on this line so it may be a single line function definition
elseif bracketCount == 0
if a:iteration == 0
let otherBracketType = scala#InvertBracketType(a:openBracket, a:closedBracket)
return scala#Testhelper(a:lnum, a:line, otherBracketType[0], otherBracketType[1], a:iteration + 1)
else
let prevCodeLNum = scala#GetPrevCodeLine(a:lnum)
let prevCodeLine = scala#GetLine(prevCodeLNum)
if scala#MatchesIncompleteDefValr(prevCodeLine) && prevCodeLine !~ '{\s*$'
return prevCodeLNum
else
let possibleIfElse = scala#LineCompletesIfElse(a:lnum, a:line)
if possibleIfElse != 0
let defValrLine = prevnonblank(possibleIfElse - 1)
let possibleDefValr = scala#GetLine(defValrLine)
if scala#MatchesIncompleteDefValr(possibleDefValr) && possibleDefValr =~ '^.*=\s*$'
return possibleDefValr
else
return -1
endif
else
return -1
endif
endif
endif
else
return -1
endif
endfunction
function! scala#Test(lnum, line, openBracket, closedBracket)
return scala#Testhelper(a:lnum, a:line, a:openBracket, a:closedBracket, 0)
endfunction
function! scala#LineCompletesDefValr(lnum, line)
let bracketCount = scala#CountBrackets(a:line, '{', '}')
if bracketCount < 0
let matchedBracket = scala#GetLineThatMatchesBracket('{', '}')
if ! scala#MatchesIncompleteDefValr(scala#GetLine(matchedBracket))
let possibleDefValr = scala#GetLine(prevnonblank(matchedBracket - 1))
if matchedBracket != -1 && scala#MatchesIncompleteDefValr(possibleDefValr)
return 1
else
return 0
endif
else
return 0
endif
elseif bracketCount == 0
let bracketCount = scala#CountBrackets(a:line, '(', ')')
if bracketCount < 0
let matchedBracket = scala#GetLineThatMatchesBracket('(', ')')
if ! scala#MatchesIncompleteDefValr(scala#GetLine(matchedBracket))
let possibleDefValr = scala#GetLine(prevnonblank(matchedBracket - 1))
if matchedBracket != -1 && scala#MatchesIncompleteDefValr(possibleDefValr)
return 1
else
return 0
endif
else
return 0
endif
elseif bracketCount == 0
let possibleDefValr = scala#GetLine(prevnonblank(a:lnum - 1))
if scala#MatchesIncompleteDefValr(possibleDefValr) && possibleDefValr =~ '^.*=\s*$'
return 1
else
let possibleIfElse = scala#LineCompletesIfElse(a:lnum, a:line)
if possibleIfElse != 0
let possibleDefValr = scala#GetLine(prevnonblank(possibleIfElse - 1))
if scala#MatchesIncompleteDefValr(possibleDefValr) && possibleDefValr =~ '^.*=\s*$'
return 2
else
return 0
endif
else
return 0
endif
endif
else
return 0
endif
endif
endfunction
function! scala#SpecificLineCompletesBrackets(lnum, openBracket, closedBracket)
let savedpos = getpos('.')
call setpos('.', [savedpos[0], a:lnum, 9999, savedpos[3]])
let retv = scala#LineCompletesBrackets(a:openBracket, a:closedBracket)
call setpos('.', savedpos)
return retv
endfunction
function! scala#LineCompletesBrackets(openBracket, closedBracket)
let savedpos = getpos('.')
let offline = 0
while offline == 0
let [lnum, colnum] = searchpos(a:closedBracket, 'Wb')
let [lnumA, colnumA] = searchpairpos(a:openBracket, '', a:closedBracket, 'Wbn')
if lnum != lnumA
let [lnumB, colnumB] = searchpairpos(a:openBracket, '', a:closedBracket, 'Wbnr')
let offline = 1
endif
endwhile
call setpos('.', savedpos)
if lnumA == lnumB && colnumA == colnumB
return lnumA
else
return -1
endif
endfunction
function! GetScalaIndent()
" Find a non-blank line above the current line.
let prevlnum = prevnonblank(v:lnum - 1)
" Hit the start of the file, use zero indent.
if prevlnum == 0
return 0
endif
let ind = indent(prevlnum)
let originalIndentValue = ind
let prevline = scala#GetLine(prevlnum)
let curlnum = v:lnum
let curline = scala#GetLine(curlnum)
if get(g:, 'scala_scaladoc_indent', 0)
let star_indent = 2
else
let star_indent = 1
end
if prevline =~ '^\s*/\*\*'
if prevline =~ '\*/\s*$'
return ind
else
return ind + star_indent
endif
endif
if curline =~ '^\s*\*'
return cindent(curlnum)
endif
" If this line starts with a { then make it indent the same as the previous line
if curline =~ '^\s*{'
call scala#ConditionalConfirm("1")
" Unless, of course, the previous one is a { as well
if prevline !~ '^\s*{'
call scala#ConditionalConfirm("2")
return indent(prevlnum)
endif
endif
" '.' continuations
if curline =~ '^\s*\.'
if prevline =~ '^\s*\.'
return ind
else
return ind + shiftwidth()
endif
endif
" Indent html literals
if prevline !~ '/>\s*$' && prevline =~ '^\s*<[a-zA-Z][^>]*>\s*$'
call scala#ConditionalConfirm("3")
return ind + shiftwidth()
endif
" assumes curly braces around try-block
if curline =~ '^\s*}\s*\<catch\>'
return ind - shiftwidth()
elseif curline =~ '^\s*\<catch\>'
return ind
endif
" Add a shiftwidth()' after lines that start a block
" If 'if', 'for' or 'while' end with ), this is a one-line block
" If 'val', 'var', 'def' end with =, this is a one-line block
if (prevline =~ '^\s*\<\%(\%(}\?\s*else\s\+\)\?if\|for\|while\)\>.*[)=]\s*$' && scala#NumberOfBraceGroups(prevline) <= 1)
\ || prevline =~ '^\s*' . s:defMatcher . '.*=\s*$'
\ || prevline =~ '^\s*\<va[lr]\>.*[=]\s*$'
\ || prevline =~ '^\s*\%(}\s*\)\?\<else\>\s*$'
\ || prevline =~ '=\s*$'
call scala#ConditionalConfirm("4")
let ind = ind + shiftwidth()
elseif prevline =~ '^\s*\<\%(}\?\s*else\s\+\)\?if\>' && curline =~ '^\s*}\?\s*\<else\>'
return ind
endif
let lineCompletedBrackets = 0
let bracketCount = scala#CountBrackets(prevline, '{', '}')
if bracketCount > 0 || prevline =~ '.*{\s*$'
call scala#ConditionalConfirm("5b")
let ind = ind + shiftwidth()
elseif bracketCount < 0
call scala#ConditionalConfirm("6b")
" if the closing brace actually completes the braces entirely, then we
" have to indent to line that started the whole thing
let completeLine = scala#LineCompletesBrackets('{', '}')
if completeLine != -1
call scala#ConditionalConfirm("8b")
let prevCompleteLine = scala#GetLine(prevnonblank(completeLine - 1))
" However, what actually started this part looks like it was a function
" definition, so we need to indent to that line instead. This is
" actually pretty weak at the moment.
if prevCompleteLine =~ '=\s*$'
call scala#ConditionalConfirm("9b")
let ind = indent(prevnonblank(completeLine - 1))
else
call scala#ConditionalConfirm("10b")
let ind = indent(completeLine)
endif
else
let lineCompletedBrackets = 1
endif
endif
if ind == originalIndentValue
let bracketCount = scala#CountBrackets(prevline, '(', ')')
if bracketCount > 0 || prevline =~ '.*(\s*$'
call scala#ConditionalConfirm("5a")
let ind = ind + shiftwidth()
elseif bracketCount < 0
call scala#ConditionalConfirm("6a")
" if the closing brace actually completes the braces entirely, then we
" have to indent to line that started the whole thing
let completeLine = scala#LineCompletesBrackets('(', ')')
if completeLine != -1 && prevline !~ '^.*{\s*$'
call scala#ConditionalConfirm("8a")
let prevCompleteLine = scala#GetLine(prevnonblank(completeLine - 1))
" However, what actually started this part looks like it was a function
" definition, so we need to indent to that line instead. This is
" actually pretty weak at the moment.
if prevCompleteLine =~ '=\s*$'
call scala#ConditionalConfirm("9a")
let ind = indent(prevnonblank(completeLine - 1))
else
call scala#ConditionalConfirm("10a")
let ind = indent(completeLine)
endif
else
" This is the only part that's different from from the '{', '}' one below
" Yup... some refactoring is necessary at some point.
let ind = ind + (bracketCount * shiftwidth())
let lineCompletedBrackets = 1
endif
endif
endif
if curline =~ '^\s*}\?\s*\<else\>\%(\s\+\<if\>\s*(.*)\)\?\s*{\?\s*$' &&
\ ! scala#LineIsCompleteIf(prevline) &&
\ prevline !~ '^.*}\s*$'
let ind = ind - shiftwidth()
endif
" Subtract a shiftwidth()' on '}' or html
let curCurlyCount = scala#CountCurlies(curline)
if curCurlyCount < 0
call scala#ConditionalConfirm("14a")
let matchline = scala#CurlyMatcher()
return indent(matchline)
elseif curline =~ '^\s*</[a-zA-Z][^>]*>'
call scala#ConditionalConfirm("14c")
return ind - shiftwidth()
endif
let prevParenCount = scala#CountParens(prevline)
if prevline =~ '^\s*\<for\>.*$' && prevParenCount > 0
call scala#ConditionalConfirm("15")
let ind = indent(prevlnum) + 5
endif
let prevCurlyCount = scala#CountCurlies(prevline)
if prevCurlyCount == 0 && prevline =~ '^.*\%(=>\|⇒\)\s*$' && prevline !~ '^\s*this\s*:.*\%(=>\|⇒\)\s*$' && curline !~ '^\s*\<case\>'
call scala#ConditionalConfirm("16")
let ind = ind + shiftwidth()
endif
if ind == originalIndentValue && curline =~ '^\s*\<case\>'
call scala#ConditionalConfirm("17")
let parentCase = scala#IsParentCase()
if parentCase != -1
call scala#ConditionalConfirm("17a")
return indent(parentCase)
endif
endif
if prevline =~ '^\s*\*/'
\ || prevline =~ '*/\s*$'
call scala#ConditionalConfirm("18")
let ind = ind - star_indent
endif
if scala#LineEndsInIncomplete(prevline)
call scala#ConditionalConfirm("19")
return ind
endif
if scala#LineIsAClosingXML(prevline)
if scala#LineCompletesXML(prevlnum, prevline)
call scala#ConditionalConfirm("20a")
return ind - shiftwidth()
else
call scala#ConditionalConfirm("20b")
return ind
endif
endif
if ind == originalIndentValue
"let indentMultiplier = scala#LineCompletesDefValr(prevlnum, prevline)
"if indentMultiplier != 0
" call scala#ConditionalConfirm("19a")
" let ind = ind - (indentMultiplier * shiftwidth())
let defValrLine = scala#Test(prevlnum, prevline, '{', '}')
if defValrLine != -1
call scala#ConditionalConfirm("21a")
let ind = indent(defValrLine)
elseif lineCompletedBrackets == 0
call scala#ConditionalConfirm("21b")
if scala#GetLine(prevnonblank(prevlnum - 1)) =~ '^.*\<else\>\s*\%(//.*\)\?$'
call scala#ConditionalConfirm("21c")
let ind = ind - shiftwidth()
elseif scala#LineCompletesIfElse(prevlnum, prevline)
call scala#ConditionalConfirm("21d")
let ind = ind - shiftwidth()
elseif scala#CountParens(curline) < 0 && curline =~ '^\s*)' && scala#GetLine(scala#GetLineThatMatchesBracket('(', ')')) =~ '.*(\s*$'
" Handles situations that look like this:
"
" val a = func(
" 10
" )
"
" or
"
" val a = func(
" 10
" ).somethingHere()
call scala#ConditionalConfirm("21e")
let ind = ind - shiftwidth()
endif
endif
endif
call scala#ConditionalConfirm("returning " . ind)
return ind
endfunction
let &cpo = s:keepcpo
unlet s:keepcpo
" vim:set sw=2 sts=2 ts=8 et:
" vim600:fdm=marker fdl=1 fdc=0:
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