" File: javascriptLint.vim

" Author: Joe Stelmach (joe@zenbe.com)

" Version: 0.2

" Description: javascriptLint.vim allows the JavaScript Lint (jsl) program

" from http://www.javascriptlint.com/ to be tightly integrated

" with vim. The contents of a javascript file will be passed

" through the jsl program after the file's buffer is saved.

" Any lint warnings will be placed in the quickfix window.

" JavaScript Lint must be installed on your system for this

" plugin to work properly. This page should get you started:

" http://www.javascriptlint.com/docs/index.htm

" Last Modified: May 5, 2009

if !exists("jslint_command")

let jslint_command = 'jsl'

endif

if !exists("jslint_command_options")

let jslint_command_options = '-nofilelisting -nocontext -nosummary -nologo -process'

endif

if !exists("jslint_highlight_color")

let jslint_highlight_color = 'DarkMagenta'

endif

" set up auto commands

autocmd BufWritePost,FileWritePost *.js call JavascriptLint()

autocmd BufWinLeave * call s:MaybeClearCursorLineColor()

" Runs the current file through javascript lint and

" opens a quickfix window with any warnings

function JavascriptLint()

" run javascript lint on the current file

let current_file = shellescape(expand('%:p'))

let cmd_output = system(g:jslint_command . ' ' . g:jslint_command_options . ' ' . current_file)

" if some warnings were found, we process them

if strlen(cmd_output) > 0

" ensure proper error format

let s:errorformat = "%f(%l):\%m^M"

" write quickfix errors to a temp file

let quickfix_tmpfile_name = tempname()

exe "redir! > " . quickfix_tmpfile_name

silent echon cmd_output

redir END

" read in the errors temp file

execute "silent! cfile " . quickfix_tmpfile_name

" change the cursor line to something hard to miss

call s:SetCursorLineColor()

" open the quicfix window

botright copen

let s:qfix_buffer = bufnr("$")

" delete the temp file

call delete(quickfix_tmpfile_name)

" if no javascript warnings are found, we revert the cursorline color

" and close the quick fix window

else

call s:ClearCursorLineColor()

if(exists("s:qfix_buffer"))

cclose

unlet s:qfix_buffer

endif

endif

endfunction

" sets the cursor line highlight color to the error highlight color

function s:SetCursorLineColor()

" check for disabled cursor line

if(!exists("g:jslint_highlight_color") || strlen(g:jslint_highlight_color) == 0)

return

endif

call s:ClearCursorLineColor()

let s:highlight_on = 1

" find the current cursor line highlight info

redir => l:highlight_info

silent highlight CursorLine

redir END

" find the guibg property within the highlight info (if it exists)

let l:start_index = match(l:highlight_info, "guibg")

if(l:start_index > 0)

let s:previous_cursor_guibg = strpart(l:highlight_info, l:start_index)

elseif(exists("s:previous_cursor_guibg"))

unlet s:previous_cursor_guibg

endif

execute "highlight CursorLine guibg=" . g:jslint_highlight_color

endfunction

" Conditionally reverts the cursor line color based on the presence

" of the quickfix window

function s:MaybeClearCursorLineColor()

if(exists("s:qfix_buffer") && s:qfix_buffer == bufnr("%"))

call s:ClearCursorLineColor()

endif

endfunction

" Reverts the cursor line color

function s:ClearCursorLineColor()

" only revert if our highlight is currently enabled

if(exists("s:highlight_on") && s:highlight_on)

let s:highlight_on = 0

" if a previous cursor guibg color was recorded, we use it

if(exists("s:previous_cursor_guibg"))

execute "highlight CursorLine " . s:previous_cursor_guibg

unlet s:previous_cursor_guibg

" otherwise, we clear the curor line highlight entirely

else

highlight clear CursorLine

endif

endif

endfunction