"============================================================================
"File:        xhtml.vim
"Description: Syntax checking plugin for syntastic.vim
"Maintainer:  Martin Grenfell <martin.grenfell at gmail dot com>
"License:     This program is free software. It comes without any warranty,
"             to the extent permitted by applicable law. You can redistribute
"             it and/or modify it under the terms of the Do What The Fuck You
"             Want To Public License, Version 2, as published by Sam Hocevar.
"             See http://sam.zoy.org/wtfpl/COPYING for more details.
"
"============================================================================
"
" Checker option:
"
" - g:syntastic_xhtml_tidy_ignore_errors (list; default: [])
"   list of errors to ignore

if exists("g:loaded_syntastic_xhtml_tidy_checker")
    finish
endif
let g:loaded_syntastic_xhtml_tidy_checker=1

if !exists('g:syntastic_xhtml_tidy_ignore_errors')
    let g:syntastic_xhtml_tidy_ignore_errors = []
endif

function! SyntaxCheckers_xhtml_tidy_IsAvailable()
    return executable("tidy")
endfunction

" TODO: join this with html.vim DRY's sake?
function! s:TidyEncOptByFenc()
    let tidy_opts = {
                \'utf-8'       : '-utf8',
                \'ascii'       : '-ascii',
                \'latin1'      : '-latin1',
                \'iso-2022-jp' : '-iso-2022',
                \'cp1252'      : '-win1252',
                \'macroman'    : '-mac',
                \'utf-16le'    : '-utf16le',
                \'utf-16'      : '-utf16',
                \'big5'        : '-big5',
                \'cp932'       : '-shiftjis',
                \'sjis'        : '-shiftjis',
                \'cp850'       : '-ibm858',
                \}
    return get(tidy_opts, &fileencoding, '-utf8')
endfunction

function! s:IgnoreError(text)
    for i in g:syntastic_xhtml_tidy_ignore_errors
        if stridx(a:text, i) != -1
            return 1
        endif
    endfor
    return 0
endfunction

function! SyntaxCheckers_xhtml_tidy_GetLocList()
    let encopt = s:TidyEncOptByFenc()
    let makeprg = syntastic#makeprg#build({
        \ 'exe': 'tidy',
        \ 'args': encopt . ' -xml -e',
        \ 'filetype': 'xhtml',
        \ 'subchecker': 'tidy' })

    let errorformat=
        \ '%Wline %l column %v - Warning: %m,' .
        \ '%Eline %l column %v - Error: %m,' .
        \ '%-G%.%#'

    let loclist = SyntasticMake({
        \ 'makeprg': makeprg,
        \ 'errorformat': errorformat,
        \ 'defaults': {'bufnr': bufnr("")},
        \ 'returns': [0, 1, 2] })

    for n in range(len(loclist))
        if loclist[n]['valid'] && s:IgnoreError(loclist[n]['text']) == 1
            let loclist[n]['valid'] = 0
        endif
    endfor

    return loclist
endfunction

call g:SyntasticRegistry.CreateAndRegisterChecker({
    \ 'filetype': 'xhtml',
    \ 'name': 'tidy'})