dots/vim/indent/javascript.vim
2010-10-27 15:41:23 -05:00

331 lines
8.7 KiB
VimL

" 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 = 1
endif
setlocal indentexpr=GetJsIndent(v:lnum)
setlocal indentkeys=0{,0},o,O,e,!<Tab>,*<Return>
" 1. Variables
" ============
" Inline comments (for anchoring other statements)
let s:js_line_comment = '\s*\(//.*\)*'
" Simple Objects
let s:js_object_beg = '[{\[]\s*'
let s:js_object_end = '^[^][{}]*[}\]][;,]\=\s*'
" Simple control blocks (those not beginngin with "{")
let s:js_s_cntrl_beg = '^\s*\(\(\(if\|for\|with\|while\)\s*(.*)\)\|\(try\|do\)\)\s*'
let s:js_s_cntrl_mid = '^\s*\(\(\(else\s*if\|catch\)\s*(.*)\)\|\(finally\|else\)\)\s*'
" Multi line control blocks (those beginning with "{")
let s:js_m_cntrl_beg = s:js_s_cntrl_beg . '\s*{\s*'
let s:js_m_cntrl_mid = '}\=\s*' . s:js_s_cntrl_mid . '\s*{\s*'
let s:js_m_cntrl_end = '^[^{]*}\s*\(while\s*(.*)\)\=\s*;\=\s*'
" Multi line declarations & invocations
let s:js_multi_beg = '([^()]*\s*'
let s:js_s_multi_end = '^[^()]*)\s*'
let s:js_m_multi_end = s:js_s_multi_end . '\s*{\s*'
" Multi line invocation
let s:js_multi_invok_beg = s:js_multi_beg
let s:js_multi_invok_end = s:js_s_multi_end . '[;,]\{1}\s*'
" Special switch control
let s:js_s_switch_beg = 'switch\s*(.*)\s*' "Actually not allowed.
let s:js_m_switch_beg = s:js_s_switch_beg . '\s*{\s*'
let s:js_switch_mid = '^.*\(case.*\|default\)\s*:\s*'
" Single line comment (// xxx)
let s:syn_comment = '\(Comment\|String\)'
" 2. Aux. Functions
" =================
" = 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: 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: 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: ")
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: Mutli-Line Block Invocation/Function Declaration
" ========================================================
if pline =~ s:js_multi_beg . s:js_line_comment . '$'
if line !~ s:js_multi_invok_end
call s:Log("Pline matched multi invoke/declare")
return ind + &sw
endif
endif
if pline =~ s:js_s_multi_end . s:js_line_comment . '$'
call s:Log("Pline matched multi end without inline {")
if line =~ s:js_object_beg . s:js_line_comment . '$'
call s:Log("Line matched object beg")
return ind - &sw
else
call s:Log("line didn't match object beginning")
return ind
endif
endif
if pline =~ s:js_m_multi_end . s:js_line_comment . '$'
call s:Log("Pline matched multi end with inline {")
if line =~ s:js_object_end . s:js_line_comment . '$'
call s:Log("Line matched object end")
return ind - &sw
else
call s:Log("Line didn't matched object end")
return ind
endif
endif
if ppline =~ s:js_s_multi_end . s:js_line_comment . '$' &&
\ pline !~ s:js_object_beg . s:js_line_comment . '$'
call s:Log("PPLine matched multi invoke/declaration end without inline {")
return ind - &sw
endif
" Handle: Multi-Line Invocation
" =============================
if pline =~ s:js_multi_invok_beg . s:js_line_comment . '$'
call s:Log("PLine matched multi line invoke")
if line =~ s:js_multi_invok_end . s:js_line_comment . '$'
call s:Log("Pline matched multi line invoke end")
return ind
else
call s:Log("Pline didn't match multi line invoke end")
return ind + &sw
endif
endif
if line =~ s:js_multi_invok_end . s:js_line_comment . '$'
call s:Log("Pline matched multi invocation end")
return ind - &sw
endif
" Handle: Switch Control Blocks
" =============================
if pline =~ s:js_m_switch_beg . s:js_line_comment . '$'
call s:Log("PLine matched switch cntrl beginning")
return ind
endif
if pline =~ s:js_switch_mid
call s:Log("PLine matched switch cntrl mid")
if line =~ s:js_switch_mid || line =~ s:js_object_end . s:js_line_comment . '$'
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 line =~ s:js_switch_mid " Doesn't need end anchor
call s:Log("Line matched switch cntrl mid")
return ind - &sw
endif
" Handle: Single Line Control Blocks
" ==========================
if pline =~ s:js_s_cntrl_beg . s:js_line_comment . '$'
call s:Log("Pline matched single line control beg")
if line =~ s:js_s_cntrl_mid. s:js_line_comment . '$' || line =~ s:js_object_beg. s:js_line_comment . '$'
call s:Log("Line matched single line control mid")
return ind
else
call s:Log("Line didn't match single line control mid")
return ind + &sw
endif
endif
if pline =~ s:js_s_cntrl_mid . s:js_line_comment . '$'
call s:Log("Pline matched single line control mid")
if line =~ s:js_s_cntrl_mid . s:js_line_comment . '$' || line =~ s:js_object_beg . s:js_line_comment . '$'
call s:Log("Line matched single line control mid")
return ind
else
call s:Log("Line didn't match single line control mid")
return ind + &sw
endif
endif
if line =~ s:js_s_cntrl_mid . s:js_line_comment . '$'
call s:Log("Line matched single line control mid")
if pline =~ s:js_m_cntrl_end . s:js_line_comment . '$'
call s:Log("PLine matched multi line control end")
return ind
else
call s:Log("Pline didn't match object end")
return ind - &sw
endif
endif
if ( ppline =~ s:js_s_cntrl_beg . s:js_line_comment . '$' || ppline =~ s:js_s_cntrl_mid . s:js_line_comment . '$' ) &&
\ pline !~ s:js_object_beg . s:js_line_comment . '$'
call s:Log("PPLine matched single line control beg or mid")
return ind - &sw
endif
" Handle: {}
" ==========
if line =~ '^[^{]*}' && !s:IsComment(a:lnum) && line !~ '"[^}]*}[^}]*"'
call s:Log("Line matched closing bracket")
" Save the cursor position.
let curpos = getpos(".")
" Set the cursor position to the beginning of the line (default
" behavior when using ==)
call setpos(".", [0, a:lnum, 1, 0])
" Search for the opening tag
let mnum = searchpair('{', '', '}', 'bW',
\ 'synIDattr(synID(line("."), col("."), 0), "name") =~? s:syn_comment' )
"Restore the cursor position
call setpos(".", curpos)
let mind = indent(mnum)
let mline = getline(mnum)
call s:Log("Matched found at: " . mnum)
if mline =~ s:js_m_multi_end " Fixes multi line invocation
call s:Log("MLine matched multi line invocation")
return mind - &sw
else
return mind
endif
endif
if pline =~ '{[^}]*$' && pline !~ '"[^{]*{[^{]*"'
call s:Log("Pline matched opening {")
return ind + &sw
endif
" Handle: []
" ==========
if line =~ '^[^\[]*\]' && !s:IsComment(a:lnum) && line !~ '"[^\]]*\][^\]]*"'
call s:Log("Line matched closing ]")
" Save the cursor position.
let curpos = getpos(".")
" Set the cursor position to the beginning of the line (default
" behavior when using ==)
call setpos(".", [0, a:lnum, 1, 0])
" Search for the opening tag
let mnum = searchpair('\[', '', '\]', 'bW',
\ 'synIDattr(synID(line("."), col("."), 0), "name") =~? s:syn_comment' )
"Restore the cursor position
call setpos(".", curpos)
call s:Log("Matched found at: " . mnum)
return indent(mnum)
endif
if pline =~ '\[[^\]]*$' && pline !~ '"[^\[]*\[[^\[]*"'
call s:Log("Pline matched opening [")
return ind + &sw
endif
call s:Log("Line didn't match anything. Retaining indent")
return ind
endfunction