vim-javascript/indent/javascript.vim at develop · aronhoff/vim-javascript · GitHub

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" Vim indent file

" Language: Javascript

" Acknowledgement: Based off of vim-ruby maintained by Nikolai Weibull http://vim-ruby.rubyforge.org

" 0. Initialization {{{1

" =================

" Only load this indent file when no other was loaded.

if exists("b:did_indent")

finish

endif

let b:did_indent = 1

setlocal nosmartindent

" Now, set up our indentation expression and keys that trigger it.

setlocal indentexpr=GetJavascriptIndent()

setlocal formatexpr=Fixedgq(v:lnum,v:count)

setlocal indentkeys=0{,0},0),0],0\,:,!^F,o,O,e

" Only define the function once.

if exists("*GetJavascriptIndent")

finish

endif

let s:cpo_save = &cpo

set cpo&vim

" 1. Variables {{{1

" ============

let s:expr_case = '^\s*$case\s\+[^\:]*\|default$\s*:\s*'

" Regex of syntax group names that are or delimit string or are comments.

let s:syng_strcom = 'string\|regex\|comment\c'

" Regex of syntax group names that are strings.

let s:syng_string = 'regex\c'

" Regex of syntax group names that are strings or documentation.

let s:syng_multiline = 'comment\c'

" Regex of syntax group names that are line comment.

let s:syng_linecom = 'linecomment\c'

" Expression used to check whether we should skip a match with searchpair().

let s:skip_expr = "synIDattr(synID(line('.'),col('.'),1),'name') =~ '".s:syng_strcom."'"

let s:line_term = '\s*\%(\%(\/\/\).*\)\=$'

" Regex that defines continuation lines, not including (, {, or [.

let s:continuation_regex = '\%([\\*+/.:]\|\%(<%\)\@<![=-]\|\W[|&?]\|||\|&&\|[^=]=[^=].*,\)' . s:line_term

" Regex that defines continuation lines.

" TODO: this needs to deal with if ...: and so on

let s:msl_regex = s:continuation_regex.'|'.s:expr_case

let s:one_line_scope_regex = '\<\%(if\|else\|for\|while\)\>[^{;]*' . s:line_term

" Regex that defines blocks.

let s:block_regex = '\%([{[]\)\s*\%(|\%([*@]\=\h\w*,\=\s*\)\%(,\s*[*@]\=\h\w*\)*|\)\=' . s:line_term

let s:var_stmt = '^\s*(const\|let\|var)'

let s:comma_first = '^\s*,'

let s:comma_last = ',\s*$'

let s:ternary = '^\s\+[?|:]'

let s:ternary_q = '^\s\+?'

let s:case_indent = &sw

let s:case_indent_after = &sw

let m = matchlist(&cinoptions, ':$.$')

if (len(m) > 2)

let s:case_indent = m[1]

endif

let m = matchlist(&cinoptions, '=$.$')

if (len(m) > 2)

let s:case_indent_after = m[1]

endif

" 2. Auxiliary Functions {{{1

" ======================

" Check if the character at lnum:col is inside a string, comment, or is ascii.

function s:IsInStringOrComment(lnum, col)

return synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_strcom

endfunction

" Check if the character at lnum:col is inside a string.

function s:IsInString(lnum, col)

return synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_string

endfunction

" Check if the character at lnum:col is inside a multi-line comment.

function s:IsInMultilineComment(lnum, col)

return !s:IsLineComment(a:lnum, a:col) && synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_multiline

endfunction

" Check if the character at lnum:col is a line comment.

function s:IsLineComment(lnum, col)

return synIDattr(synID(a:lnum, a:col, 1), 'name') =~ s:syng_linecom

endfunction

" Find line above 'lnum' that isn't empty, in a comment, or in a string.

function s:PrevNonBlankNonString(lnum)

let in_block = 0

let lnum = prevnonblank(a:lnum)

while lnum > 0

" Go in and out of blocks comments as necessary.

" If the line isn't empty (with opt. comment) or in a string, end search.

let line = getline(lnum)

if line =~ '/\*'

if in_block

let in_block = 0

else

break

endif

elseif !in_block && line =~ '\*/'

let in_block = 1

elseif !in_block && line !~ '^\s*\%(//\).*$' && !(s:IsInStringOrComment(lnum, 1) && s:IsInStringOrComment(lnum, strlen(line)))

break

endif

let lnum = prevnonblank(lnum - 1)

endwhile

return lnum

endfunction

" Find line above 'lnum' that started the continuation 'lnum' may be part of.

function s:GetMSL(lnum, in_one_line_scope)

" Start on the line we're at and use its indent.

let msl = a:lnum

let lnum = s:PrevNonBlankNonString(a:lnum - 1)

while lnum > 0

" If we have a continuation line, or we're in a string, use line as MSL.

" Otherwise, terminate search as we have found our MSL already.

let line = getline(lnum)

let col = match(line, s:msl_regex) + 1

if (col > 0 && !s:IsInStringOrComment(lnum, col)) || s:IsInString(lnum, strlen(line))

let msl = lnum

else

" Don't use lines that are part of a one line scope as msl unless the

" flag in_one_line_scope is set to 1

if a:in_one_line_scope

break

end

let msl_one_line = s:Match(lnum, s:one_line_scope_regex)

if msl_one_line == 0

break

endif

let lnum = s:PrevNonBlankNonString(lnum - 1)

endwhile

return msl

endfunction

function s:RemoveTrailingComments(content)

let single = '\/\/$.*$\s*$'

let multi = '\/\*$.*$\*\/\s*$'

return substitute(substitute(a:content, single, '', ''), multi, '', '')

endfunction

" Find if the string is inside var statement (but not the first string)

function s:InMultiVarStatement(lnum)

let lnum = s:PrevNonBlankNonString(a:lnum - 1)

" let type = synIDattr(synID(lnum, indent(lnum) + 1, 0), 'name')

" loop through previous expressions to find a var statement

while lnum > 0

let line = getline(lnum)

" if the line is a js keyword

if (line =~ s:js_keywords)

" check if the line is a var stmt

" if the line has a comma first or comma last then we can assume that we

" are in a multiple var statement

if (line =~ s:var_stmt)

return lnum

endif

" other js keywords, not a var

return 0

endif

let lnum = s:PrevNonBlankNonString(lnum - 1)

endwhile

" beginning of program, not a var

return 0

endfunction

" Find line above with beginning of the var statement or returns 0 if it's not

" this statement

function s:GetVarIndent(lnum)

let lvar = s:InMultiVarStatement(a:lnum)

let prev_lnum = s:PrevNonBlankNonString(a:lnum - 1)

if lvar

let line = s:RemoveTrailingComments(getline(prev_lnum))

" if the previous line doesn't end in a comma, return to regular indent

if (line !~ s:comma_last)

return indent(prev_lnum) - &sw

else

return indent(lvar) + &sw

endif

return -1

endfunction

" Check if line 'lnum' has more opening brackets than closing ones.

function s:LineHasOpeningBrackets(lnum)

let open_0 = 0

let open_2 = 0

let open_4 = 0

let line = getline(a:lnum)

let pos = match(line, '[][(){}]', 0)

while pos != -1

if !s:IsInStringOrComment(a:lnum, pos + 1)

let idx = stridx('(){}[]', line[pos])

if idx % 2 == 0

let open_{idx} = open_{idx} + 1

else

let open_{idx - 1} = open_{idx - 1} - 1

endif

let pos = match(line, '[][(){}]', pos + 1)

endwhile

return (open_0 > 0) . (open_2 > 0) . (open_4 > 0)

endfunction

function s:Match(lnum, regex)

let col = match(getline(a:lnum), a:regex) + 1

return col > 0 && !s:IsInStringOrComment(a:lnum, col) ? col : 0

endfunction

function s:IndentWithContinuation(lnum, ind, width)

" Set up variables to use and search for MSL to the previous line.

let p_lnum = a:lnum

let lnum = s:GetMSL(a:lnum, 1)

let line = getline(lnum)

" If the previous line wasn't a MSL and is continuation return its indent.

" TODO: the || s:IsInString() thing worries me a bit.

if p_lnum != lnum

if s:Match(p_lnum,s:continuation_regex)||s:IsInString(p_lnum,strlen(line))

return a:ind

endif

" Set up more variables now that we know we aren't continuation bound.

let msl_ind = indent(lnum)

" If the previous line ended with [*+/.-=], start a continuation that

" indents an extra level.

if s:Match(lnum, s:continuation_regex)

if lnum == p_lnum

return msl_ind + a:width

else

return msl_ind

endif

return a:ind

endfunction

function s:InOneLineScope(lnum)

let msl = s:GetMSL(a:lnum, 1)

if msl > 0 && s:Match(msl, s:one_line_scope_regex)

return msl

endif

return 0

endfunction

function s:ExitingOneLineScope(lnum)

let msl = s:GetMSL(a:lnum, 1)

if msl > 0

" if the current line is in a one line scope ..

if s:Match(msl, s:one_line_scope_regex)

return 0

else

let prev_msl = s:GetMSL(msl - 1, 1)

if s:Match(prev_msl, s:one_line_scope_regex)

return prev_msl

endif

return 0

endfunction

" 3. GetJavascriptIndent Function {{{1

" =========================

function GetJavascriptIndent()

" 3.1. Setup {{{2

" ----------

" Set up variables for restoring position in file. Could use v:lnum here.

let vcol = col('.')

" 3.2. Work on the current line {{{2

" -----------------------------

let ind = -1

" Get the current line.

let line = getline(v:lnum)

" previous nonblank line number

let prevline = prevnonblank(v:lnum - 1)

if (line =~ s:expr_case)

if (getline(prevline) =~ s:expr_case)

return indent(prevline)

else

if (getline(prevline) =~ s:block_regex)

return indent(prevline) + s:case_indent

else

return indent(prevline) - s:case_indent_after

endif

" If we got a closing bracket on an empty line, find its match and indent

" according to it. For parentheses we indent to its column - 1, for the

" others we indent to the containing line's MSL's level. Return -1 if fail.

let col = matchend(line, '^\s*[],})]')

if col > 0 && !s:IsInStringOrComment(v:lnum, col)

call cursor(v:lnum, col)

let lvar = s:InMultiVarStatement(v:lnum)

if lvar

let prevline_contents = s:RemoveTrailingComments(getline(prevline))

" check for comma first

if (line[col - 1] =~ ',')

" if the previous line ends in comma or semicolon don't indent

if (prevline_contents =~ '[;,]\s*$')

return indent(s:GetMSL(line('.'), 0))

" get previous line indent, if it's comma first return prevline indent

elseif (prevline_contents =~ s:comma_first)

return indent(prevline)

" otherwise we indent 1 level

else

return indent(lvar) + &sw

endif

let bs = strpart('(){}[]', stridx(')}]', line[col - 1]) * 2, 2)

if searchpair(escape(bs[0], '\['), '', bs[1], 'bW', s:skip_expr) > 0

if line[col-1]==')' && col('.') != col('$') - 1

let ind = virtcol('.')-1

else

let ind = indent(s:GetMSL(line('.'), 0))

endif

return ind

endif

" If the line is comma first, dedent 1 level

if (getline(prevline) =~ s:comma_first)

return indent(prevline) - &sw

endif

if (getline(prevline) =~ s:expr_case)

return indent(prevline) + s:case_indent_after

endif

if (line =~ s:ternary)

if (getline(prevline) =~ s:ternary_q)

return indent(prevline)

else

return indent(prevline) + &sw

endif

" If we are in a multi-line comment, cindent does the right thing.

if s:IsInMultilineComment(v:lnum, 1) && !s:IsLineComment(v:lnum, 1)

return cindent(v:lnum)

endif

" Check for multiple var assignments

" let var_indent = s:GetVarIndent(v:lnum)

" if var_indent >= 0

" return var_indent

" endif

" 3.3. Work on the previous line. {{{2

" -------------------------------

" If the line is empty and the previous nonblank line was a multi-line

" comment, use that comment's indent. Deduct one char to account for the

" space in ' */'.

if line =~ '^\s*$' && s:IsInMultilineComment(prevline, 1)

return indent(prevline) - 1

endif

" Find a non-blank, non-multi-line string line above the current line.

let lnum = s:PrevNonBlankNonString(v:lnum - 1)

" If the line is empty and inside a string, use the previous line.

if line =~ '^\s*$' && lnum != prevline

return indent(prevnonblank(v:lnum))

endif

" At the start of the file use zero indent.

if lnum == 0

return 0

endif

" If the previous line ended with a block opening, add a level of indent.

if s:Match(lnum, s:block_regex)

if (line =~ s:expr_case)

return indent(s:GetMSL(lnum, 0)) + &sw/2

else

return indent(s:GetMSL(lnum, 0)) + &sw

endif

" Set up variables for current line.

let line = getline(lnum)

let ind = indent(lnum)

" If the previous line contained an opening bracket, and we are still in it,

" add indent depending on the bracket type.

if line =~ '[[({]'

let counts = s:LineHasOpeningBrackets(lnum)

if counts[0] == '1' && searchpair('(', '', ')', 'bW', s:skip_expr) > 0

if col('.') + 1 == col('$')

return ind + &sw

else

return virtcol('.')

endif

elseif counts[1] == '1' || counts[2] == '1'

return ind + &sw

else

call cursor(v:lnum, vcol)

end

endif

" 3.4. Work on the MSL line. {{{2

" --------------------------

let ind_con = ind

let ind = s:IndentWithContinuation(lnum, ind_con, &sw)

" }}}2

let ols = s:InOneLineScope(lnum)

if ols > 0

let ind = ind + &sw

else

let ols = s:ExitingOneLineScope(lnum)

while ols > 0 && ind > 0

let ind = ind - &sw

let ols = s:InOneLineScope(ols - 1)

endwhile

endif

return ind

endfunction

" }}}1

let &cpo = s:cpo_save

unlet s:cpo_save

function! Fixedgq(lnum, count)

let l:tw = &tw ? &tw : 80;

let l:count = a:count

let l:first_char = indent(a:lnum) + 1

if mode() == 'i' " gq was not pressed, but tw was set

return 1

endif

" This gq is only meant to do code with strings, not comments

if s:IsLineComment(a:lnum, l:first_char) || s:IsInMultilineComment(a:lnum, l:first_char)

return 1

endif

if len(getline(a:lnum)) < l:tw && l:count == 1 " No need for gq

return 1

endif

" Put all the lines on one line and do normal spliting after that

if l:count > 1

while l:count > 1

let l:count -= 1

normal J

endwhile

endif

let l:winview = winsaveview()

call cursor(a:lnum, l:tw + 1)

let orig_breakpoint = searchpairpos(' ', '', '\.', 'bcW', '', a:lnum)

call cursor(a:lnum, l:tw + 1)

let breakpoint = searchpairpos(' ', '', '\.', 'bcW', s:skip_expr, a:lnum)

" No need for special treatment, normal gq handles edgecases better

if breakpoint[1] == orig_breakpoint[1]

call winrestview(l:winview)

return 1

endif

" Try breaking after string

if breakpoint[1] <= indent(a:lnum)

call cursor(a:lnum, l:tw + 1)

let breakpoint = searchpairpos('\.', '', ' ', 'cW', s:skip_expr, a:lnum)

endif

if breakpoint[1] != 0

call feedkeys("r\<CR>")

else

let l:count = l:count - 1

endif

" run gq on new lines

if l:count == 1

call feedkeys("gqq")

endif

return 0

endfunction

vim-javascript/indent/javascript.vim at develop · aronhoff/vim-javascript · GitHub

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