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@sooop
Created March 3, 2014 05:07
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" toggle comment line
function! SetCommentPrefix()
let s:comment_prefix = "#"
if &filetype == "vim"
" for vim, inline comment start with \"
let s:comment_prefix = "\""
elseif &filetype ==? "c" || &filetype ==? "objc" || &filetype ==? "cpp"
let s:comment_prefix = "//"
endif
endfunction
function! CommentLine(line_number)
call SetCommentPrefix()
" remember current cursor position
let cpos = getpos(".")
" move to seletced line
call setpos(".", [0, a:line_number, 0, 0])
" just insert comment prefix character at the front of given line
exec "normal! I".s:comment_prefix
"restore cursor position
call setpos(".", cpos)
endfunction
function! UncommentLine(line_number)
call SetCommentPrefix()
" remember current cursor position
let cpos = getpos(".")
"move to selected line
call setpos(".", [0, a:line_number, 0, 0])
" remove comment prefix charactor
exec ".s/".escape(s:comment_prefix, s:comment_prefix[0])."//"
" restore cursor position
call setpos(".", cpos)
endfunction
function! CheckIsComment(line_number)
call SetCommentPrefix()
" check the line for given line number is comment
let sl = getline(a:line_number)
let c = 0
while c < strlen(sl)
let d = c + strlen(s:comment_prefix) - 1
"sl[c] is space or tabe?
if " \t" =~ sl[c]
" ignore indentation
" pass
elseif sl[(c):(d)] == s:comment_prefix
return 1
else
return 0
endif
let c += 1
endwhile
return 0
endfunction
function! ToggleCommentLine()
let cl = line(".")
if CheckIsComment(cl)
call UncommentLine(cl)
else
call CommentLine(cl)
endif
endfunction
function! ToggleCommentRange()
let line_begin = line("'<")
let line_end = line("'>")
" decide mode with first line in selection
let mode_ = CheckIsComment(line_begin)
let cpos = getpos(".")
let i = line_begin
while i < line_end + 1
if mode_
call UncommentLine(i)
else
call CommentLine(i)
endif
let i+=1
endwhile
endfunction
nnoremap <leader>\ :call ToggleCommentLine()<cr>
vnoremap <leader>\ <esc> :call ToggleCommentRange()<cr>
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