gistfile1.vim

let g:Tex_DefaultTargetFormat='pdf'
let g:Tex_CompileRule_pdf = 'dvipdfmx $*.dvi'
let g:Tex_BibtexFlavor = 'jbibtex'
let g:Tex_CompileRule_dvi = 'platex-utf8 -interaction-nonstopmode $*'
let g:Tex_FormatDependency_pdf='dvi,pdf'
let g:Tex_ViewRule_pdf = 'open -a /Applications/Preview.app'
let g:Tex_IgnoredWarnings =
      \"Underfull\n".
      \"Overfull\n".
      \"specifier changed to\n".
      \"You have requested\n".
      \"Missing number, treated as zero.\n".
      \"There were undefined references\n".
      \"Citation %.%# undefined\n".
      \'LaTeX Font Warning:'"
let g:Tex_IgnoreLevel = 8
function! CompileAndView()
  execute 'w'
  call Tex_RunLaTeX()
  if !empty(getqflist()) 
    return 0
  endif
  call Tex_ViewLaTeX()
endfunction
autocmd FileType tex nnoremap <leader>r :call CompileAndView()<CR>