path: root/runtime/syntax/2html.vim

" Vim syntax support file
" Maintainer: Bram Moolenaar <Bram@vim.org>
" Last Change: 2006 Apr 19
"	       (modified by David Ne\v{c}as (Yeti) <yeti@physics.muni.cz>)
"	       (XHTML support by Panagiotis Issaris <takis@lumumba.luc.ac.be>)

" Transform a file into HTML, using the current syntax highlighting.

" Number lines when explicitely requested or when `number' is set
if exists("html_number_lines")
  let s:numblines = html_number_lines
else
  let s:numblines = &number
endif

" When not in gui we can only guess the colors.
if has("gui_running")
  let s:whatterm = "gui"
else
  let s:whatterm = "cterm"
  if &t_Co == 8
    let s:cterm_color0  = "#808080"
    let s:cterm_color1  = "#ff6060"
    let s:cterm_color2  = "#00ff00"
    let s:cterm_color3  = "#ffff00"
    let s:cterm_color4  = "#8080ff"
    let s:cterm_color5  = "#ff40ff"
    let s:cterm_color6  = "#00ffff"
    let s:cterm_color7  = "#ffffff"
  else
    let s:cterm_color0  = "#000000"
    let s:cterm_color1  = "#c00000"
    let s:cterm_color2  = "#008000"
    let s:cterm_color3  = "#804000"
    let s:cterm_color4  = "#0000c0"
    let s:cterm_color5  = "#c000c0"
    let s:cterm_color6  = "#008080"
    let s:cterm_color7  = "#c0c0c0"
    let s:cterm_color8  = "#808080"
    let s:cterm_color9  = "#ff6060"
    let s:cterm_color10 = "#00ff00"
    let s:cterm_color11 = "#ffff00"
    let s:cterm_color12 = "#8080ff"
    let s:cterm_color13 = "#ff40ff"
    let s:cterm_color14 = "#00ffff"
    let s:cterm_color15 = "#ffffff"
  endif
endif

" Return good color specification: in GUI no transformation is done, in
" terminal return RGB values of known colors and empty string on unknown
if s:whatterm == "gui"
  function! s:HtmlColor(color)
    return a:color
  endfun
else
  function! s:HtmlColor(color)
    if exists("s:cterm_color" . a:color)
      execute "return s:cterm_color" . a:color
    else
      return ""
    endif
  endfun
endif

if !exists("html_use_css")
  " Return opening HTML tag for given highlight id
  function! s:HtmlOpening(id)
    let a = ""
    if synIDattr(a:id, "inverse")
      " For inverse, we always must set both colors (and exchange them)
      let x = s:HtmlColor(synIDattr(a:id, "fg#", s:whatterm))
      let a = a . '<span style="background-color: ' . ( x != "" ? x : s:fgc ) . '">'
      let x = s:HtmlColor(synIDattr(a:id, "bg#", s:whatterm))
      let a = a . '<font color="' . ( x != "" ? x : s:bgc ) . '">'
    else
      let x = s:HtmlColor(synIDattr(a:id, "bg#", s:whatterm))
      if x != "" | let a = a . '<span style="background-color: ' . x . '">' | endif
      let x = s:HtmlColor(synIDattr(a:id, "fg#", s:whatterm))
      if x != "" | let a = a . '<font color="' . x . '">' | endif
    endif
    if synIDattr(a:id, "bold") | let a = a . "<b>" | endif
    if synIDattr(a:id, "italic") | let a = a . "<i>" | endif
    if synIDattr(a:id, "underline") | let a = a . "<u>" | endif
    return a
  endfun

  " Return closing HTML tag for given highlight id
  function s:HtmlClosing(id)
    let a = ""
    if synIDattr(a:id, "underline") | let a = a . "</u>" | endif
    if synIDattr(a:id, "italic") | let a = a . "</i>" | endif
    if synIDattr(a:id, "bold") | let a = a . "</b>" | endif
    if synIDattr(a:id, "inverse")
      let a = a . '</font></span>'
    else
      let x = s:HtmlColor(synIDattr(a:id, "fg#", s:whatterm))
      if x != "" | let a = a . '</font>' | endif
      let x = s:HtmlColor(synIDattr(a:id, "bg#", s:whatterm))
      if x != "" | let a = a . '</span>' | endif
    endif
    return a
  endfun
endif

" Return HTML valid characters enclosed in a span of class style_name with
" unprintable characters expanded and double spaces replaced as necessary.
function! s:HtmlFormat(text, style_name)
  " Replace unprintable characters
  let formatted = strtrans(a:text)

  " Replace the reserved html characters
  let formatted = substitute(substitute(substitute(substitute(substitute(formatted, '&', '\&amp;', 'g'), '<', '\&lt;', 'g'), '>', '\&gt;', 'g'), '"', '\&quot;', 'g'), "\x0c", '<hr class="PAGE-BREAK">', 'g')
  
  " Replace double spaces and leading spaces
  if ' ' != s:HtmlSpace 
    let formatted = substitute(formatted, '  ', s:HtmlSpace . s:HtmlSpace, 'g')
    let formatted = substitute(formatted, '^ ', s:HtmlSpace, 'g')
  endif

  " Enclose in a span of class style_name
  let formatted = '<span class="' . a:style_name . '">' . formatted . '</span>'

  " Add the class to class list if it's not there yet
  let s:id = hlID(a:style_name)
  if stridx(s:idlist, "," . s:id . ",") == -1
    let s:idlist = s:idlist . s:id . ","
  endif

  return formatted
endfun

" Return CSS style describing given highlight id (can be empty)
function! s:CSS1(id)
  let a = ""
  if synIDattr(a:id, "inverse")
    " For inverse, we always must set both colors (and exchange them)
    let x = s:HtmlColor(synIDattr(a:id, "bg#", s:whatterm))
    let a = a . "color: " . ( x != "" ? x : s:bgc ) . "; "
    let x = s:HtmlColor(synIDattr(a:id, "fg#", s:whatterm))
    let a = a . "background-color: " . ( x != "" ? x : s:fgc ) . "; "
  else
    let x = s:HtmlColor(synIDattr(a:id, "fg#", s:whatterm))
    if x != "" | let a = a . "color: " . x . "; " | endif
    let x = s:HtmlColor(synIDattr(a:id, "bg#", s:whatterm))
    if x != "" | let a = a . "background-color: " . x . "; " | endif
  endif
  if synIDattr(a:id, "bold") | let a = a . "font-weight: bold; " | endif
  if synIDattr(a:id, "italic") | let a = a . "font-style: italic; " | endif
  if synIDattr(a:id, "underline") | let a = a . "text-decoration: underline; " | endif
  return a
endfun

" Figure out proper MIME charset from the 'encoding' option.
if exists("html_use_encoding")
  let s:html_encoding = html_use_encoding
else
  let s:vim_encoding = &encoding
  if s:vim_encoding =~ '^8bit\|^2byte'
    let s:vim_encoding = substitute(s:vim_encoding, '^8bit-\|^2byte-', '', '')
  endif
  if s:vim_encoding == 'latin1'
    let s:html_encoding = 'iso-8859-1'
  elseif s:vim_encoding =~ "^cp12"
    let s:html_encoding = substitute(s:vim_encoding, 'cp', 'windows-', '')
  elseif s:vim_encoding == 'sjis'
    let s:html_encoding = 'Shift_JIS'
  elseif s:vim_encoding == 'big5'
    let s:html_encoding = "Big5"
  elseif s:vim_encoding == 'euc-cn'
    let s:html_encoding = 'GB_2312-80'
  elseif s:vim_encoding == 'euc-tw'
    let s:html_encoding = ""
  elseif s:vim_encoding =~ '^euc\|^iso\|^koi'
    let s:html_encoding = substitute(s:vim_encoding, '.*', '\U\0', '')
  elseif s:vim_encoding == 'cp949'
    let s:html_encoding = 'KS_C_5601-1987'
  elseif s:vim_encoding == 'cp936'
    let s:html_encoding = 'GBK'
  elseif s:vim_encoding =~ '^ucs\|^utf'
    let s:html_encoding = 'UTF-8'
  else
    let s:html_encoding = ""
  endif
endif


" Set some options to make it work faster.
" Don't report changes for :substitute, there will be many of them.
let s:old_title = &title
let s:old_icon = &icon
let s:old_et = &l:et
let s:old_report = &report
let s:old_search = @/
set notitle noicon
setlocal et
set report=1000000

" Split window to create a buffer with the HTML file.
let s:orgbufnr = winbufnr(0)
if expand("%") == ""
  new Untitled.html
else
  new %.html
endif
let s:newwin = winnr()
let s:orgwin = bufwinnr(s:orgbufnr)

set modifiable
%d
let s:old_paste = &paste
set paste
let s:old_magic = &magic
set magic

if exists("use_xhtml")
  if s:html_encoding != ""
    exe "normal!  a<?xml version=\"1.0\" encoding=\"" . s:html_encoding . "\"?>\n\e"
  else
    exe "normal! a<?xml version=\"1.0\"?>\n\e"
  endif
  let s:tag_close = '/>'
else
  let s:tag_close = '>'
endif

let s:HtmlSpace = ' '
let s:LeadingSpace = ' '
let s:HtmlEndline = ''
if exists("html_no_pre")
  let s:HtmlEndline = '<br' . s:tag_close
  if exists("use_xhtml")
    let s:LeadingSpace = '&#x20;'
  else
    let s:LeadingSpace = '&nbsp;'
  endif
  let s:HtmlSpace = '\' . s:LeadingSpace
endif

" HTML header, with the title and generator ;-). Left free space for the CSS,
" to be filled at the end.
exe "normal! a<html>\n\e"
exe "normal! a<head>\n<title>" . expand("%:p:~") . "</title>\n\e"
exe "normal! a<meta name=\"Generator\" content=\"Vim/" . v:version/100 . "." . v:version %100 . '"' . s:tag_close . "\n\e"
if s:html_encoding != ""
  exe "normal! a<meta http-equiv=\"content-type\" content=\"text/html; charset=" . s:html_encoding . '"' . s:tag_close . "\n\e"
endif
if exists("html_use_css")
  exe "normal! a<style type=\"text/css\">\n<!--\n-->\n</style>\n\e"
endif
if exists("html_no_pre")
  if exists("use_xhtml")
    exe "normal! a</head>\n<body>\n<p>\n\e"
  else
    exe "normal! a</head>\n<body>\n\e"
  endif
else
  if exists("use_xhtml")
    exe "normal! a</head>\n<body>\n<p>\n<pre>\n\e"
  else
    exe "normal! a</head>\n<body>\n<pre>\n\e"
  endif
endif

exe s:orgwin . "wincmd w"

" List of all id's
let s:idlist = ","

" Loop over all lines in the original text.
" Use html_start_line and html_end_line if they are set.
if exists("html_start_line")
  let s:lnum = html_start_line
  if s:lnum < 1 || s:lnum > line("$")
    let s:lnum = 1
  endif
else
  let s:lnum = 1
endif
if exists("html_end_line")
  let s:end = html_end_line
  if s:end < s:lnum || s:end > line("$")
    let s:end = line("$")
  endif
else
  let s:end = line("$")
endif

if has('folding') && !exists('html_ignore_folding')
  let s:foldfillchar = &fillchars[matchend(&fillchars, 'fold:')]
  if s:foldfillchar == ''
    let s:foldfillchar = '-'
  endif
endif
let s:difffillchar = &fillchars[matchend(&fillchars, 'diff:')]
if s:difffillchar == ''
  let s:difffillchar = '-'
endif


while s:lnum <= s:end

  " If there are filler lines for diff mode, show these above the line.
  let s:filler = diff_filler(s:lnum)
  if s:filler > 0
    let s:n = s:filler
    while s:n > 0
      if s:numblines
        " Indent if line numbering is on
        let s:new = repeat(s:LeadingSpace, strlen(s:end) + 1) . repeat(s:difffillchar, 3)
      else
        let s:new = repeat(s:difffillchar, 3)
      endif

      if s:n > 2 && s:n < s:filler && !exists("html_whole_filler")
	let s:new = s:new . " " . s:filler . " inserted lines "
	let s:n = 2
      endif

      if !exists