vim-settings/vim/dot_vim/indent/javascript.vim

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2012-03-29 03:18:33 +00:00
" Vim indent file Language: JavaScript
" Author: Preston Koprivica (pkopriv2@gmail.com)
" URL:
" Last Change: April 30, 2010
" 0. Standard Stuff
" =================
" Only load one indent script per buffer
if exists('b:did_indent')
finish
endif
let b:did_indent = 1
" Set the global log variable 1 = logging enabled, 0 = logging disabled
if !exists("g:js_indent_log")
let g:js_indent_log = 0
endif
setlocal indentexpr=GetJsIndent(v:lnum)
setlocal indentkeys=
setlocal cindent
setlocal autoindent
" 1. Variables
" ============
" Inline comments (for anchoring other statements)
let s:js_mid_line_comment = '\s*\(\/\*.*\*\/\)*\s*'
let s:js_end_line_comment = s:js_mid_line_comment . '\s*\(//.*\)*'
let s:js_line_comment = s:js_end_line_comment
" Comment/String Syntax Key
let s:syn_comment = '\(Comment\|String\|Regexp\)'
" 2. Aux. Functions
" =================
" = Method: IsInComment
"
" Determines whether the specified position is contained in a comment. "Note:
" This depends on a
function! s:IsInComment(lnum, cnum)
return synIDattr(synID(a:lnum, a:cnum, 1), 'name') =~? s:syn_comment
endfunction
" = Method: IsComment
"
" Determines whether a line is a comment or not.
function! s:IsComment(lnum)
let line = getline(a:lnum)
return s:IsInComment(a:lnum, 1) && s:IsInComment(a:lnum, strlen(line)) "Doesn't absolutely work. Only Probably!
endfunction
" = Method: GetNonCommentLine
"
" Grabs the nearest non-commented line
function! s:GetNonCommentLine(lnum)
let lnum = prevnonblank(a:lnum)
while lnum > 0
if s:IsComment(lnum)
let lnum = prevnonblank(lnum - 1)
else
return lnum
endif
endwhile
return lnum
endfunction
" = Method: SearchForPair
"
" Returns the beginning tag of a given pair starting from the given line.
function! s:SearchForPair(lnum, beg, end)
" Save the cursor position.
let curpos = getpos(".")
" Set the cursor position to the beginning of the line (default
" behavior when using ==)
call cursor(a:lnum, 0)
" Search for the opening tag
let mnum = searchpair(a:beg, '', a:end, 'bW',
\ 'synIDattr(synID(line("."), col("."), 0), "name") =~? s:syn_comment' )
"Restore the cursor position
call cursor(curpos)
" Finally, return the matched line number
return mnum
endfunction
" Object Helpers
" ==============
let s:object_beg = '{[^}]*' . s:js_end_line_comment . '$'
let s:object_end = '^' . s:js_mid_line_comment . '}[;,]\='
function! s:IsObjectBeg(line)
return a:line =~ s:object_beg
endfunction
function! s:IsObjectEnd(line)
return a:line =~ s:object_end
endfunction
function! s:GetObjectBeg(lnum)
return s:SearchForPair(a:lnum, '{', '}')
endfunction
" Array Helpers
" ==============
let s:array_beg = '\[[^\]]*' . s:js_end_line_comment . '$'
let s:array_end = '^' . s:js_mid_line_comment . '[^\[]*\][;,]*' . s:js_end_line_comment . '$'
function! s:IsArrayBeg(line)
return a:line =~ s:array_beg
endfunction
function! s:IsArrayEnd(line)
return a:line =~ s:array_end
endfunction
function! s:GetArrayBeg(lnum)
return s:SearchForPair(a:lnum, '\[', '\]')
endfunction
" MultiLine Declaration/Invocation Helpers
" ========================================
let s:paren_beg = '([^)]*' . s:js_end_line_comment . '$'
let s:paren_end = '^' . s:js_mid_line_comment . '[^(]*)[;,]*'
function! s:IsParenBeg(line)
return a:line =~ s:paren_beg
endfunction
function! s:IsParenEnd(line)
return a:line =~ s:paren_end
endfunction
function! s:GetParenBeg(lnum)
return s:SearchForPair(a:lnum, '(', ')')
endfunction
" Continuation Helpers
" ====================
let s:continuation = '\(+\|\\\)\{1}' . s:js_line_comment . '$'
function! s:IsContinuationLine(line)
return a:line =~ s:continuation
endfunction
function! s:GetContinuationBegin(lnum)
let cur = a:lnum
while s:IsContinuationLine(getline(cur))
let cur -= 1
endwhile
return cur + 1
endfunction
" Switch Helpers
" ==============
let s:switch_beg_next_line = 'switch\s*(.*)\s*' . s:js_mid_line_comment . s:js_end_line_comment . '$'
let s:switch_beg_same_line = 'switch\s*(.*)\s*' . s:js_mid_line_comment . '{\s*' . s:js_line_comment . '$'
let s:switch_mid = '^.*\(case.*\|default\)\s*:\s*'
function! s:IsSwitchBeginNextLine(line)
return a:line =~ s:switch_beg_next_line
endfunction
function! s:IsSwitchBeginSameLine(line)
return a:line =~ s:switch_beg_same_line
endfunction
function! s:IsSwitchMid(line)
return a:line =~ s:switch_mid
endfunction
" Control Helpers
" ===============
let s:cntrl_beg_keys = '\(\(\(if\|for\|with\|while\)\s*(.*)\)\|\(try\|do\)\)\s*'
let s:cntrl_mid_keys = '\(\(\(else\s*if\|catch\)\s*(.*)\)\|\(finally\|else\)\)\s*'
let s:cntrl_beg = s:cntrl_beg_keys . s:js_end_line_comment . '$'
let s:cntrl_mid = s:cntrl_mid_keys . s:js_end_line_comment . '$'
let s:cntrl_end = '\(while\s*(.*)\)\s*;\=\s*' . s:js_end_line_comment . '$'
function! s:IsControlBeg(line)
return a:line =~ s:cntrl_beg
endfunction
function! s:IsControlMid(line)
return a:line =~ s:cntrl_mid
endfunction
function! s:IsControlMidStrict(line)
return a:line =~ s:cntrl_mid
endfunction
function! s:IsControlEnd(line)
return a:line =~ s:cntrl_end
endfunction
" = Method: Log
"
" Logs a message to the stdout.
function! s:Log(msg)
if g:js_indent_log
echo "LOG: " . a:msg
endif
endfunction
" 3. Indenter
" ===========
function! GetJsIndent(lnum)
" Grab the first non-comment line prior to this line
let pnum = s:GetNonCommentLine(a:lnum-1)
" First line, start at indent = 0
if pnum == 0
call s:Log("No, noncomment lines prior to the current line.")
return 0
endif
" Grab the second non-comment line prior to this line
let ppnum = s:GetNonCommentLine(pnum-1)
call s:Log("Line: " . a:lnum)
call s:Log("PLine: " . pnum)
call s:Log("PPLine: " . ppnum)
" Grab the lines themselves.
let line = getline(a:lnum)
let pline = getline(pnum)
let ppline = getline(ppnum)
" Determine the current level of indentation
let ind = indent(pnum)
" Handle: Object Closers (ie })
" =============================
if s:IsObjectEnd(line) && !s:IsComment(a:lnum)
call s:Log("Line matched object end")
let obeg = s:GetObjectBeg(a:lnum)
let oind = indent(obeg)
let oline = getline(obeg)
call s:Log("The object beg was found at: " . obeg)
return oind
endif
if s:IsObjectBeg(pline)
call s:Log("Pline matched object beg")
return ind + &sw
endif
" Handle: Array Closer (ie ])
" ============================
if s:IsArrayEnd(line) && !s:IsComment(a:lnum)
call s:Log("Line matched array end")
let abeg = s:GetArrayBeg(a:lnum)
let aind = indent(abeg)
call s:Log("The array beg was found at: " . abeg)
return aind
endif
if s:IsArrayBeg(pline)
call s:Log("Pline matched array beg")
return ind + &sw
endif
" Handle: Parens
" ==============
if s:IsParenEnd(line) && !s:IsComment(a:lnum)
call s:Log("Line matched paren end")
let abeg = s:GetParenBeg(a:lnum)
let aind = indent(abeg)
call s:Log("The paren beg was found at: " . abeg)
return aind
endif
if s:IsParenBeg(pline)
call s:Log("Pline matched paren beg")
return ind + &sw
endif
" Handle: Continuation Lines.
" ========================================================
if s:IsContinuationLine(pline)
call s:Log('Pline is a continuation line.')
let cbeg = s:GetContinuationBegin(pnum)
let cind = indent(cbeg)
call s:Log('The continuation block begin found at: ' . cbeg)
return cind + &sw
endif
if s:IsContinuationLine(ppline)
call s:Log('PPline was a continuation line but pline wasnt.')
return ind - &sw
endif
" Handle: Switch Control Blocks
" =============================
if s:IsSwitchMid(pline)
call s:Log("PLine matched switch cntrl mid")
if s:IsSwitchMid(line) || s:IsObjectEnd(line)
call s:Log("Line matched a cntrl mid")
return ind
else
call s:Log("Line didnt match a cntrl mid")
return ind + &sw
endif
endif
if s:IsSwitchMid(line)
call s:Log("Line matched switch cntrl mid")
return ind - &sw
endif
" Handle: Single Line Control Blocks
" ==================================
if s:IsControlBeg(pline)
call s:Log("Pline matched control beginning")
if s:IsControlMid(line)
call s:Log("Line matched a control mid")
return ind
elseif line =~ '^\s*{\s*$'
call s:Log("Line matched an object beg")
return ind
else
return ind + &sw
endif
endif
if s:IsControlMid(pline)
call s:Log("Pline matched a control mid")
if s:IsControlMid(line)
call s:Log("Line matched a control mid")
return ind
elseif s:IsObjectBeg(line)
call s:Log("Line matched an object beg")
return ind
else
call s:Log("Line didn't match a control mid or object beg."
return ind + &sw
endif
endif
if s:IsControlMid(line)
call s:Log("Line matched a control mid.")
if s:IsControlEnd(pline) || s:IsObjectEnd(pline)
call s:Log("PLine matched control end")
return ind
else
call s:Log("Pline didn't match object end")
return ind - &sw
endif
endif
if ( s:IsControlBeg(ppline) || s:IsControlMid(ppline) ) &&
\ !s:IsObjectBeg(pline) && !s:IsObjectEnd(pline)
call s:Log("PPLine matched single line control beg or mid")
return ind - &sw
endif
" Handle: No matches
" ==================
"call s:Log("Line didn't match anything. Retaining indent")
return ind
endfunction