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Diffstat (limited to 'runtime/indent/julia.vim')
| -rw-r--r-- | runtime/indent/julia.vim | 497 |
1 files changed, 497 insertions, 0 deletions
diff --git a/runtime/indent/julia.vim b/runtime/indent/julia.vim new file mode 100644 index 0000000..8e4c603 --- /dev/null +++ b/runtime/indent/julia.vim @@ -0,0 +1,497 @@ +" Vim indent file +" Language: Julia +" Maintainer: Carlo Baldassi <carlobaldassi@gmail.com> +" Homepage: https://github.com/JuliaEditorSupport/julia-vim +" Last Change: 2022 Jun 14 +" Notes: originally based on Bram Molenaar's indent file for vim + +" Only load this indent file when no other was loaded. +if exists("b:did_indent") + finish +endif +let b:did_indent = 1 + +setlocal autoindent + +setlocal indentexpr=GetJuliaIndent() +setlocal indentkeys+==end,=else,=catch,=finally,),],} +setlocal indentkeys-=0# +setlocal indentkeys-=: +setlocal indentkeys-=0{ +setlocal indentkeys-=0} +setlocal nosmartindent + +" Only define the function once. +if exists("*GetJuliaIndent") + finish +endif + +let s:skipPatternsBasic = '\<julia\%(Comment\%([LM]\|Delim\)\)\>' +let s:skipPatterns = '\<julia\%(Comprehension\%(For\|If\)\|RangeKeyword\|Comment\%([LM]\|Delim\)\|\%([bs]\|Shell\|Printf\|Doc\)\?String\|StringPrefixed\|DocStringM\(Raw\)\?\|RegEx\|SymbolS\?\|Macro\|Dotted\)\>' + +function JuliaMatch(lnum, str, regex, st, ...) + let s = a:st + let e = a:0 > 0 ? a:1 : -1 + let basic_skip = a:0 > 1 ? a:2 : 'all' + let skip = basic_skip ==# 'basic' ? s:skipPatternsBasic : s:skipPatterns + while 1 + let f = match(a:str, '\C' . a:regex, s) + if e >= 0 && f >= e + return -1 + endif + if f >= 0 + let attr = synIDattr(synID(a:lnum,f+1,1),"name") + let attrT = synIDattr(synID(a:lnum,f+1,0),"name") + if attr =~# skip || attrT =~# skip + let s = f+1 + continue + endif + endif + break + endwhile + return f +endfunction + +function GetJuliaNestingStruct(lnum, ...) + " Auxiliary function to inspect the block structure of a line + let line = getline(a:lnum) + let s = a:0 > 0 ? a:1 : 0 + let e = a:0 > 1 ? a:2 : -1 + let blocks_stack = [] + let num_closed_blocks = 0 + while 1 + let fb = JuliaMatch(a:lnum, line, '\<\%(if\|else\%(if\)\?\|while\|for\|try\|catch\|finally\|\%(staged\)\?function\|macro\|begin\|mutable\s\+struct\|\%(mutable\s\+\)\@<!struct\|\%(abstract\|primitive\)\s\+type\|let\|\%(bare\)\?module\|quote\|do\)\>', s, e) + let fe = JuliaMatch(a:lnum, line, '\<end\>', s, e) + + if fb < 0 && fe < 0 + " No blocks found + break + end + + if fb >= 0 && (fb < fe || fe < 0) + " The first occurrence is an opening block keyword + " Note: some keywords (elseif,else,catch,finally) are both + " closing blocks and opening new ones + + let i = JuliaMatch(a:lnum, line, '\<if\>', s) + if i >= 0 && i == fb + let s = i+1 + call add(blocks_stack, 'if') + continue + endif + let i = JuliaMatch(a:lnum, line, '\<elseif\>', s) + if i >= 0 && i == fb + let s = i+1 + if len(blocks_stack) > 0 && blocks_stack[-1] == 'if' + let blocks_stack[-1] = 'elseif' + elseif (len(blocks_stack) > 0 && blocks_stack[-1] != 'elseif') || len(blocks_stack) == 0 + call add(blocks_stack, 'elseif') + let num_closed_blocks += 1 + endif + continue + endif + let i = JuliaMatch(a:lnum, line, '\<else\>', s) + if i >= 0 && i == fb + let s = i+1 + if len(blocks_stack) > 0 && blocks_stack[-1] =~# '\<\%(else\)\=if\>' + let blocks_stack[-1] = 'else' + else + call add(blocks_stack, 'else') + let num_closed_blocks += 1 + endif + continue + endif + + let i = JuliaMatch(a:lnum, line, '\<try\>', s) + if i >= 0 && i == fb + let s = i+1 + call add(blocks_stack, 'try') + continue + endif + let i = JuliaMatch(a:lnum, line, '\<catch\>', s) + if i >= 0 && i == fb + let s = i+1 + if len(blocks_stack) > 0 && blocks_stack[-1] == 'try' + let blocks_stack[-1] = 'catch' + else + call add(blocks_stack, 'catch') + let num_closed_blocks += 1 + endif + continue + endif + let i = JuliaMatch(a:lnum, line, '\<finally\>', s) + if i >= 0 && i == fb + let s = i+1 + if len(blocks_stack) > 0 && (blocks_stack[-1] == 'try' || blocks_stack[-1] == 'catch') + let blocks_stack[-1] = 'finally' + else + call add(blocks_stack, 'finally') + let num_closed_blocks += 1 + endif + continue + endif + + let i = JuliaMatch(a:lnum, line, '\<\%(bare\)\?module\>', s) + if i >= 0 && i == fb + let s = i+1 + if i == 0 + call add(blocks_stack, 'col1module') + else + call add(blocks_stack, 'other') + endif + continue + endif + + let i = JuliaMatch(a:lnum, line, '\<\%(while\|for\|function\|macro\|begin\|\%(mutable\s\+\)\?struct\|\%(abstract\|primitive\)\s\+type\|let\|quote\|do\)\>', s) + if i >= 0 && i == fb + if match(line, '\C\<\%(mutable\|abstract\|primitive\)', i) != -1 + let s = i+11 + else + let s = i+1 + endif + call add(blocks_stack, 'other') + continue + endif + + " Note: it should be impossible to get here + break + + else + " The first occurrence is an 'end' + + let s = fe+1 + if len(blocks_stack) == 0 + let num_closed_blocks += 1 + else + call remove(blocks_stack, -1) + endif + continue + + endif + + " Note: it should be impossible to get here + break + endwhile + let num_open_blocks = len(blocks_stack) - count(blocks_stack, 'col1module') + return [num_open_blocks, num_closed_blocks] +endfunction + +function GetJuliaNestingBrackets(lnum, c) + " Auxiliary function to inspect the brackets structure of a line + let line = getline(a:lnum)[0 : (a:c - 1)] + let s = 0 + let brackets_stack = [] + let last_closed_bracket = -1 + while 1 + let fb = JuliaMatch(a:lnum, line, '[([{]', s) + let fe = JuliaMatch(a:lnum, line, '[])}]', s) + + if fb < 0 && fe < 0 + " No brackets found + break + end + + if fb >= 0 && (fb < fe || fe < 0) + " The first occurrence is an opening bracket + + let i = JuliaMatch(a:lnum, line, '(', s) + if i >= 0 && i == fb + let s = i+1 + call add(brackets_stack, ['par',i]) + continue + endif + + let i = JuliaMatch(a:lnum, line, '\[', s) + if i >= 0 && i == fb + let s = i+1 + call add(brackets_stack, ['sqbra',i]) + continue + endif + + let i = JuliaMatch(a:lnum, line, '{', s) + if i >= 0 && i == fb + let s = i+1 + call add(brackets_stack, ['curbra',i]) + continue + endif + + " Note: it should be impossible to get here + break + + else + " The first occurrence is a closing bracket + + let i = JuliaMatch(a:lnum, line, ')', s) + if i >= 0 && i == fe + let s = i+1 + if len(brackets_stack) > 0 && brackets_stack[-1][0] == 'par' + call remove(brackets_stack, -1) + else + let last_closed_bracket = i + 1 + endif + continue + endif + + let i = JuliaMatch(a:lnum, line, ']', s) + if i >= 0 && i == fe + let s = i+1 + if len(brackets_stack) > 0 && brackets_stack[-1][0] == 'sqbra' + call remove(brackets_stack, -1) + else + let last_closed_bracket = i + 1 + endif + continue + endif + + let i = JuliaMatch(a:lnum, line, '}', s) + if i >= 0 && i == fe + let s = i+1 + if len(brackets_stack) > 0 && brackets_stack[-1][0] == 'curbra' + call remove(brackets_stack, -1) + else + let last_closed_bracket = i + 1 + endif + continue + endif + + " Note: it should be impossible to get here + break + + endif + + " Note: it should be impossible to get here + break + endwhile + let first_open_bracket = -1 + let last_open_bracket = -1 + let infuncargs = 0 + if len(brackets_stack) > 0 + let first_open_bracket = brackets_stack[0][1] + let last_open_bracket = brackets_stack[-1][1] + if brackets_stack[-1][0] == 'par' && IsFunctionArgPar(a:lnum, last_open_bracket+1) + let infuncargs = 1 + endif + endif + return [first_open_bracket, last_open_bracket, last_closed_bracket, infuncargs] +endfunction + +let s:bracketBlocks = '\<julia\%(\%(\%(Printf\)\?Par\|SqBra\%(Idx\)\?\|CurBra\)Block\|ParBlockInRange\|StringVars\%(Par\|SqBra\|CurBra\)\|Dollar\%(Par\|SqBra\)\|QuotedParBlockS\?\)\>' + +function IsInBrackets(lnum, c) + let stack = map(synstack(a:lnum, a:c), 'synIDattr(v:val, "name")') + call filter(stack, 'v:val =~# s:bracketBlocks') + return len(stack) > 0 +endfunction + +function IsInDocString(lnum) + let stack = map(synstack(a:lnum, 1), 'synIDattr(v:val, "name")') + call filter(stack, 'v:val =~# "\\<juliaDocString\\(Delim\\|M\\\(Raw\\)\\?\\)\\?\\>"') + return len(stack) > 0 +endfunction + +function IsInContinuationImportLine(lnum) + let stack = map(synstack(a:lnum, 1), 'synIDattr(v:val, "name")') + call filter(stack, 'v:val =~# "\\<juliaImportLine\\>"') + if len(stack) == 0 + return 0 + endif + return JuliaMatch(a:lnum, getline(a:lnum), '\<\%(import\|using\|export\)\>', indent(a:lnum)) == -1 +endfunction + +function IsFunctionArgPar(lnum, c) + if a:c == 0 + return 0 + endif + let stack = map(synstack(a:lnum, a:c-1), 'synIDattr(v:val, "name")') + return len(stack) >= 2 && stack[-2] ==# 'juliaFunctionDef' +endfunction + +function JumpToMatch(lnum, last_closed_bracket) + " we use the % command to skip back (tries to ues matchit if possible, + " otherwise resorts to vim's default, which is buggy but better than + " nothing) + call cursor(a:lnum, a:last_closed_bracket) + let percmap = maparg("%", "n") + if exists("g:loaded_matchit") && percmap =~# 'Match\%(it\|_wrapper\)' + normal % + else + normal! % + end +endfunction + +" Auxiliary function to find a line which does not start in the middle of a +" multiline bracketed expression, to be used as reference for block +" indentation. +function LastBlockIndent(lnum) + let lnum = a:lnum + let ind = 0 + while lnum > 0 + let ind = indent(lnum) + if ind == 0 + return [lnum, 0] + endif + if !IsInBrackets(lnum, 1) + break + endif + let lnum = prevnonblank(lnum - 1) + endwhile + return [max([lnum,1]), ind] +endfunction + +function GetJuliaIndent() + " Do not alter doctrings indentation + if IsInDocString(v:lnum) + return -1 + endif + + " Find a non-blank line above the current line. + let lnum = prevnonblank(v:lnum - 1) + + " At the start of the file use zero indent. + if lnum == 0 + return 0 + endif + + let ind = -1 + let st = -1 + let lim = -1 + + " Multiline bracketed expressions take precedence + let align_brackets = get(g:, "julia_indent_align_brackets", 1) + let align_funcargs = get(g:, "julia_indent_align_funcargs", 0) + let c = len(getline(lnum)) + 1 + while IsInBrackets(lnum, c) + let [first_open_bracket, last_open_bracket, last_closed_bracket, infuncargs] = GetJuliaNestingBrackets(lnum, c) + + " First scenario: the previous line has a hanging open bracket: + " set the indentation to match the opening bracket (plus an extra space) + " unless we're in a function arguments list or alignment is disabled, in + " which case we just add an extra indent + if last_open_bracket != -1 + if (!infuncargs && align_brackets) || (infuncargs && align_funcargs) + let st = last_open_bracket + let ind = virtcol([lnum, st + 1]) + else + let ind = indent(lnum) + shiftwidth() + endif + + " Second scenario: some multiline bracketed expression was closed in the + " previous line. But since we know we are still in a bracketed expression, + " we need to find the line where the bracket was opened + elseif last_closed_bracket != -1 + call JumpToMatch(lnum, last_closed_bracket) + if line(".") == lnum + " something wrong here, give up + let ind = indent(lnum) + else + let lnum = line(".") + let c = col(".") - 1 + if c == 0 + " uhm, give up + let ind = 0 + else + " we skipped a bracket set, keep searching for an opening bracket + let lim = c + continue + endif + endif + + " Third scenario: nothing special: keep the indentation + else + let ind = indent(lnum) + endif + + " Does the current line start with a closing bracket? Then depending on + " the situation we align it with the opening one, or we let the rest of + " the code figure it out (the case in which we're closing a function + " argument list is special-cased) + if JuliaMatch(v:lnum, getline(v:lnum), '[])}]', indent(v:lnum)) == indent(v:lnum) && ind > 0 + if !align_brackets && !align_funcargs + call JumpToMatch(v:lnum, indent(v:lnum)) + return indent(line(".")) + elseif (align_brackets && getline(v:lnum)[indent(v:lnum)] != ')') || align_funcargs + return ind - 1 + else " must be a ')' and align_brackets==1 and align_funcargs==0 + call JumpToMatch(v:lnum, indent(v:lnum)) + if IsFunctionArgPar(line("."), col(".")) + let ind = -1 + else + return ind - 1 + endif + endif + endif + + break + endwhile + + if ind == -1 + " We are not in a multiline bracketed expression. Thus we look for a + " previous line to use as a reference + let [lnum,ind] = LastBlockIndent(lnum) + let c = len(getline(lnum)) + 1 + if IsInBrackets(lnum, c) + let [first_open_bracket, last_open_bracket, last_closed_bracket, infuncargs] = GetJuliaNestingBrackets(lnum, c) + let lim = first_open_bracket + endif + end + + " Analyse the reference line + let [num_open_blocks, num_closed_blocks] = GetJuliaNestingStruct(lnum, st, lim) + " Increase indentation for each newly opened block in the reference line + let ind += shiftwidth() * num_open_blocks + + " Analyse the current line + let [num_open_blocks, num_closed_blocks] = GetJuliaNestingStruct(v:lnum) + " Decrease indentation for each closed block in the current line + let ind -= shiftwidth() * num_closed_blocks + + " Additional special case: multiline import/using/export statements + + let prevline = getline(lnum) + " Are we in a multiline import/using/export statement, right below the + " opening line? + if IsInContinuationImportLine(v:lnum) && !IsInContinuationImportLine(lnum) + if get(g:, 'julia_indent_align_import', 1) + " if the opening line has a colon followed by non-comments, use it as + " reference point + let cind = JuliaMatch(lnum, prevline, ':', indent(lnum), lim) + if cind >= 0 + let nonwhiteind = JuliaMatch(lnum, prevline, '\S', cind+1, -1, 'basic') + if nonwhiteind >= 0 + " return match(prevline, '\S', cind+1) " a bit overkill... + return cind + 2 + endif + else + " if the opening line is not a naked import/using/export statement, use + " it as reference + let iind = JuliaMatch(lnum, prevline, '\<import\|using\|export\>', indent(lnum), lim) + if iind >= 0 + " assuming whitespace after using... so no `using(XYZ)` please! + let nonwhiteind = JuliaMatch(lnum, prevline, '\S', iind+6, -1, 'basic') + if nonwhiteind >= 0 + return match(prevline, '\S', iind+6) + endif + endif + endif + endif + let ind += shiftwidth() + + " Or did we just close a multiline import/using/export statement? + elseif !IsInContinuationImportLine(v:lnum) && IsInContinuationImportLine(lnum) + " find the starting line of the statement + let ilnum = 0 + for iln in range(lnum-1, 1, -1) + if !IsInContinuationImportLine(iln) + let ilnum = iln + break + endif + endfor + if ilnum == 0 + " something went horribly wrong, give up + let ind = indent(lnum) + endif + let ind = indent(ilnum) + endif + + return ind +endfunction |