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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 " 2023 Aug 28 by Vim Project (undo_indent) 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> let b:undo_indent = "setl ai< inde< indk<" if exists("*GetScalaIndent") finish endif let s:keepcpo= &cpo set cpo&vim let s:annotationMatcher = '@[A-Za-z._]\+\s\+' let s:modifierMatcher = s:annotationMatcher . '\|\%(private\|protected\)\%(\[[^\]]*\]\)\?\s\+\|abstract\s\+\|override\s\+\|final\s\+' let s:defMatcher = '\%(' . s:modifierMatcher . '\)*\<def\>' let s:valMatcher = '\%(' . s:modifierMatcher . '\|lazy\s\+\)*\<va[lr]\>' 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 . '\|' . s:valMatcher . '\).*[=({]\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*' . s:valMatcher . '.*[=]\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: