feat!: rewrite TOhtml in lua

Co-authored-by: wookayin <wookayin@gmail.com>
Co-authored-by: clason <c.clason@uni-graz.at>
Co-authored-by: Lewis Russell <me@lewisr.dev>

1 files changed, 0 insertions, 2068 deletions

diff --git a/runtime/syntax/2html.vim b/runtime/syntax/2html.vim
deleted file mode 100644
index 5fbdad90f3..0000000000
--- a/runtime/syntax/2html.vim
+++ /dev/null
@@ -1,2068 +0,0 @@
-" Vim syntax support file
-" Maintainer: Ben Fritz <fritzophrenic@gmail.com>
-" Last Change: 2023 Sep 05
-"
-" Additional contributors:
-"
-"             Original by Bram Moolenaar <Bram@vim.org>
-"             Modified by David Ne\v{c}as (Yeti) <yeti@physics.muni.cz>
-"             XHTML support by Panagiotis Issaris <takis@lumumba.luc.ac.be>
-"             Made w3 compliant by Edd Barrett <vext01@gmail.com>
-"             Added html_font. Edd Barrett <vext01@gmail.com>
-"             Progress bar based off code from "progressbar widget" plugin by
-"               Andreas Politz, heavily modified:
-"               http://www.vim.org/scripts/script.php?script_id=2006
-"
-"             See Mercurial change logs for more!
-
-" Transform a file into HTML, using the current syntax highlighting.
-
-" this file uses line continuations
-let s:cpo_sav = &cpo
-let s:ls  = &ls
-let s:ei_sav = &eventignore
-set cpo&vim
-
-" HTML filetype can take a while to load/highlight if the destination file
-" already exists.
-set eventignore+=FileType
-
-let s:end=line('$')
-
-" Font
-if exists("g:html_font")
-  if type(g:html_font) == type([])
-    let s:htmlfont = "'".. join(g:html_font,"','") .. "', monospace"
-  else
-    let s:htmlfont = "'".. g:html_font .. "', monospace"
-  endif
-else
-  let s:htmlfont = "monospace"
-endif
-
-let s:settings = tohtml#GetUserSettings()
-
-if s:settings.use_xhtml
-  let s:html5 = 0
-elseif s:settings.use_css && !s:settings.no_pre
-  let s:html5 = 1
-else
-  let s:html5 = 0
-endif
-
-if !exists('s:FOLDED_ID')
-  let s:FOLDED_ID  = hlID("Folded")     | lockvar s:FOLDED_ID
-  let s:FOLD_C_ID  = hlID("FoldColumn") | lockvar s:FOLD_C_ID
-  let s:LINENR_ID  = hlID('LineNr')     | lockvar s:LINENR_ID
-  let s:DIFF_D_ID  = hlID("DiffDelete") | lockvar s:DIFF_D_ID
-  let s:DIFF_A_ID  = hlID("DiffAdd")    | lockvar s:DIFF_A_ID
-  let s:DIFF_C_ID  = hlID("DiffChange") | lockvar s:DIFF_C_ID
-  let s:DIFF_T_ID  = hlID("DiffText")   | lockvar s:DIFF_T_ID
-  let s:CONCEAL_ID = hlID('Conceal')    | lockvar s:CONCEAL_ID
-endif
-
-" Whitespace
-if s:settings.pre_wrap
-  let s:whitespace = "white-space: pre-wrap; "
-else
-  let s:whitespace = ""
-endif
-
-if !empty(s:settings.prevent_copy)
-  if s:settings.no_invalid
-    " User has decided they don't want invalid markup. Still works in
-    " OpenOffice, and for text editors, but when pasting into Microsoft Word the
-    " input elements get pasted too and they cannot be deleted (at least not
-    " easily).
-    let s:unselInputType = ""
-  else
-    " Prevent from copy-pasting the input elements into Microsoft Word where
-    " they cannot be deleted easily by deliberately inserting invalid markup.
-    let s:unselInputType = " type='invalid_input_type'"
-  endif
-endif
-
-" When gui colors are not supported, we can only guess the colors.
-" TODO - is this true anymore? Is there a way to ask the terminal what colors
-" each number means or read them from some file?
-if &termguicolors || has("gui_running")
-  let s:whatterm = "gui"
-else
-  let s:whatterm = "cterm"
-  if &t_Co == 8
-    let s:cterm_color = {
-	    \   0: "#808080", 1: "#ff6060", 2: "#00ff00", 3: "#ffff00",
-	    \   4: "#8080ff", 5: "#ff40ff", 6: "#00ffff", 7: "#ffffff"
-	    \ }
-  else
-    let s:cterm_color = {
-	    \   0: "#000000", 1: "#c00000", 2: "#008000", 3: "#804000", 
-	    \   4: "#0000c0", 5: "#c000c0", 6: "#008080", 7: "#c0c0c0", 
-	    \   8: "#808080", 9: "#ff6060", 10: "#00ff00", 11: "#ffff00",
-	    \   12: "#8080ff", 13: "#ff40ff", 14: "#00ffff", 15: "#ffffff"
-	    \ }
-
-    " Colors for 88 and 256 come from xterm.
-    if &t_Co == 88
-      call extend(s:cterm_color, {
-	    \   16: "#000000", 17: "#00008b", 18: "#0000cd", 19: "#0000ff",
-	    \   20: "#008b00", 21: "#008b8b", 22: "#008bcd", 23: "#008bff",
-	    \   24: "#00cd00", 25: "#00cd8b", 26: "#00cdcd", 27: "#00cdff",
-	    \   28: "#00ff00", 29: "#00ff8b", 30: "#00ffcd", 31: "#00ffff",
-	    \   32: "#8b0000", 33: "#8b008b", 34: "#8b00cd", 35: "#8b00ff",
-	    \   36: "#8b8b00", 37: "#8b8b8b", 38: "#8b8bcd", 39: "#8b8bff",
-	    \   40: "#8bcd00", 41: "#8bcd8b", 42: "#8bcdcd", 43: "#8bcdff",
-	    \   44: "#8bff00", 45: "#8bff8b", 46: "#8bffcd", 47: "#8bffff",
-	    \   48: "#cd0000", 49: "#cd008b", 50: "#cd00cd", 51: "#cd00ff",
-	    \   52: "#cd8b00", 53: "#cd8b8b", 54: "#cd8bcd", 55: "#cd8bff",
-	    \   56: "#cdcd00", 57: "#cdcd8b", 58: "#cdcdcd", 59: "#cdcdff",
-	    \   60: "#cdff00", 61: "#cdff8b", 62: "#cdffcd", 63: "#cdffff",
-	    \   64: "#ff0000"
-	    \ })
-      call extend(s:cterm_color, {
-	    \   65: "#ff008b", 66: "#ff00cd", 67: "#ff00ff", 68: "#ff8b00",
-	    \   69: "#ff8b8b", 70: "#ff8bcd", 71: "#ff8bff", 72: "#ffcd00",
-	    \   73: "#ffcd8b", 74: "#ffcdcd", 75: "#ffcdff", 76: "#ffff00",
-	    \   77: "#ffff8b", 78: "#ffffcd", 79: "#ffffff", 80: "#2e2e2e",
-	    \   81: "#5c5c5c", 82: "#737373", 83: "#8b8b8b", 84: "#a2a2a2",
-	    \   85: "#b9b9b9", 86: "#d0d0d0", 87: "#e7e7e7"
-	    \ })
-    elseif &t_Co == 256
-      call extend(s:cterm_color, {
-	    \   16: "#000000", 17: "#00005f", 18: "#000087", 19: "#0000af",
-	    \   20: "#0000d7", 21: "#0000ff", 22: "#005f00", 23: "#005f5f",
-	    \   24: "#005f87", 25: "#005faf", 26: "#005fd7", 27: "#005fff",
-	    \   28: "#008700", 29: "#00875f", 30: "#008787", 31: "#0087af",
-	    \   32: "#0087d7", 33: "#0087ff", 34: "#00af00", 35: "#00af5f",
-	    \   36: "#00af87", 37: "#00afaf", 38: "#00afd7", 39: "#00afff",
-	    \   40: "#00d700", 41: "#00d75f", 42: "#00d787", 43: "#00d7af",
-	    \   44: "#00d7d7", 45: "#00d7ff", 46: "#00ff00", 47: "#00ff5f",
-	    \   48: "#00ff87", 49: "#00ffaf", 50: "#00ffd7", 51: "#00ffff",
-	    \   52: "#5f0000", 53: "#5f005f", 54: "#5f0087", 55: "#5f00af",
-	    \   56: "#5f00d7", 57: "#5f00ff", 58: "#5f5f00", 59: "#5f5f5f",
-	    \   60: "#5f5f87", 61: "#5f5faf", 62: "#5f5fd7", 63: "#5f5fff",
-	    \   64: "#5f8700"
-	    \ })
-      call extend(s:cterm_color, {
-	    \   65: "#5f875f", 66: "#5f8787", 67: "#5f87af", 68: "#5f87d7",
-	    \   69: "#5f87ff", 70: "#5faf00", 71: "#5faf5f", 72: "#5faf87",
-	    \   73: "#5fafaf", 74: "#5fafd7", 75: "#5fafff", 76: "#5fd700",
-	    \   77: "#5fd75f", 78: "#5fd787", 79: "#5fd7af", 80: "#5fd7d7",
-	    \   81: "#5fd7ff", 82: "#5fff00", 83: "#5fff5f", 84: "#5fff87",
-	    \   85: "#5fffaf", 86: "#5fffd7", 87: "#5fffff", 88: "#870000",
-	    \   89: "#87005f", 90: "#870087", 91: "#8700af", 92: "#8700d7",
-	    \   93: "#8700ff", 94: "#875f00", 95: "#875f5f", 96: "#875f87",
-	    \   97: "#875faf", 98: "#875fd7", 99: "#875fff", 100: "#878700",
-	    \   101: "#87875f", 102: "#878787", 103: "#8787af", 104: "#8787d7",
-	    \   105: "#8787ff", 106: "#87af00", 107: "#87af5f", 108: "#87af87",
-	    \   109: "#87afaf", 110: "#87afd7", 111: "#87afff", 112: "#87d700"
-	    \ })
-      call extend(s:cterm_color, {
-	    \   113: "#87d75f", 114: "#87d787", 115: "#87d7af", 116: "#87d7d7",
-	    \   117: "#87d7ff", 118: "#87ff00", 119: "#87ff5f", 120: "#87ff87",
-	    \   121: "#87ffaf", 122: "#87ffd7", 123: "#87ffff", 124: "#af0000",
-	    \   125: "#af005f", 126: "#af0087", 127: "#af00af", 128: "#af00d7",
-	    \   129: "#af00ff", 130: "#af5f00", 131: "#af5f5f", 132: "#af5f87",
-	    \   133: "#af5faf", 134: "#af5fd7", 135: "#af5fff", 136: "#af8700",
-	    \   137: "#af875f", 138: "#af8787", 139: "#af87af", 140: "#af87d7",
-	    \   141: "#af87ff", 142: "#afaf00", 143: "#afaf5f", 144: "#afaf87",
-	    \   145: "#afafaf", 146: "#afafd7", 147: "#afafff", 148: "#afd700",
-	    \   149: "#afd75f", 150: "#afd787", 151: "#afd7af", 152: "#afd7d7",
-	    \   153: "#afd7ff", 154: "#afff00", 155: "#afff5f", 156: "#afff87",
-	    \   157: "#afffaf", 158: "#afffd7"
-	    \ })
-      call extend(s:cterm_color, {
-	    \   159: "#afffff", 160: "#d70000", 161: "#d7005f", 162: "#d70087",
-	    \   163: "#d700af", 164: "#d700d7", 165: "#d700ff", 166: "#d75f00",
-	    \   167: "#d75f5f", 168: "#d75f87", 169: "#d75faf", 170: "#d75fd7",
-	    \   171: "#d75fff", 172: "#d78700", 173: "#d7875f", 174: "#d78787",
-	    \   175: "#d787af", 176: "#d787d7", 177: "#d787ff", 178: "#d7af00",
-	    \   179: "#d7af5f", 180: "#d7af87", 181: "#d7afaf", 182: "#d7afd7",
-	    \   183: "#d7afff", 184: "#d7d700", 185: "#d7d75f", 186: "#d7d787",
-	    \   187: "#d7d7af", 188: "#d7d7d7", 189: "#d7d7ff", 190: "#d7ff00",
-	    \   191: "#d7ff5f", 192: "#d7ff87", 193: "#d7ffaf", 194: "#d7ffd7",
-	    \   195: "#d7ffff", 196: "#ff0000", 197: "#ff005f", 198: "#ff0087",
-	    \   199: "#ff00af", 200: "#ff00d7", 201: "#ff00ff", 202: "#ff5f00",
-	    \   203: "#ff5f5f", 204: "#ff5f87"
-	    \ })
-      call extend(s:cterm_color, {
-	    \   205: "#ff5faf", 206: "#ff5fd7", 207: "#ff5fff", 208: "#ff8700",
-	    \   209: "#ff875f", 210: "#ff8787", 211: "#ff87af", 212: "#ff87d7",
-	    \   213: "#ff87ff", 214: "#ffaf00", 215: "#ffaf5f", 216: "#ffaf87",
-	    \   217: "#ffafaf", 218: "#ffafd7", 219: "#ffafff", 220: "#ffd700",
-	    \   221: "#ffd75f", 222: "#ffd787", 223: "#ffd7af", 224: "#ffd7d7",
-	    \   225: "#ffd7ff", 226: "#ffff00", 227: "#ffff5f", 228: "#ffff87",
-	    \   229: "#ffffaf", 230: "#ffffd7", 231: "#ffffff", 232: "#080808",
-	    \   233: "#121212", 234: "#1c1c1c", 235: "#262626", 236: "#303030",
-	    \   237: "#3a3a3a", 238: "#444444", 239: "#4e4e4e", 240: "#585858",
-	    \   241: "#626262", 242: "#6c6c6c", 243: "#767676", 244: "#808080",
-	    \   245: "#8a8a8a", 246: "#949494", 247: "#9e9e9e", 248: "#a8a8a8",
-	    \   249: "#b2b2b2", 250: "#bcbcbc", 251: "#c6c6c6", 252: "#d0d0d0",
-	    \   253: "#dadada", 254: "#e4e4e4", 255: "#eeeeee"
-	    \ })
-    endif
-  endif
-endif
-
-" Return good color specification: in GUI no transformation is done, in
-" terminal return RGB values of known colors and empty string for unknown
-if s:whatterm == "gui"
-  function! s:HtmlColor(color)
-    return a:color
-  endfun
-else
-  function! s:HtmlColor(color)
-    if has_key(s:cterm_color, a:color)
-      return s:cterm_color[a:color]
-    else
-      return ""
-    endif
-  endfun
-endif
-
-" Find out the background and foreground color for use later
-let s:fgc = s:HtmlColor(synIDattr(hlID("Normal")->synIDtrans(), "fg#", s:whatterm))
-let s:bgc = s:HtmlColor(synIDattr(hlID("Normal")->synIDtrans(), "bg#", s:whatterm))
-if s:fgc == ""
-  let s:fgc = ( &background == "dark" ? "#ffffff" : "#000000" )
-endif
-if s:bgc == ""
-  let s:bgc = ( &background == "dark" ? "#000000" : "#ffffff" )
-endif
-
-if !s:settings.use_css
-  " Return opening HTML tag for given highlight id
-  function! s:HtmlOpening(id, extra_attrs)
-    let a = ""
-    let translated_ID = synIDtrans(a:id)
-    if synIDattr(translated_ID, "inverse")
-      " For inverse, we always must set both colors (and exchange them)
-      let x = s:HtmlColor(synIDattr(translated_ID, "fg#", s:whatterm))
-      let a = a .. '<span '..a:extra_attrs..'style="background-color: ' .. ( x != "" ? x : s:fgc ) .. '">'
-      let x = s:HtmlColor(synIDattr(translated_ID, "bg#", s:whatterm))
-      let a = a .. '<font color="' .. ( x != "" ? x : s:bgc ) .. '">'
-    else
-      let x = s:HtmlColor(synIDattr(translated_ID, "bg#", s:whatterm))
-      if x != ""
-	let a = a .. '<span '..a:extra_attrs..'style="background-color: ' .. x .. '">'
-      elseif !empty(a:extra_attrs)
-	let a = a .. '<span '..a:extra_attrs..'>'
-      endif
-      let x = s:HtmlColor(synIDattr(translated_ID, "fg#", s:whatterm))
-      if x != "" | let a = a .. '<font color="' .. x .. '">' | endif
-    endif
-    if synIDattr(translated_ID, "bold") | let a = a .. "<b>" | endif
-    if synIDattr(translated_ID, "italic") | let a = a .. "<i>" | endif
-    if synIDattr(translated_ID, "underline") | let a = a .. "<u>" | endif
-    return a
-  endfun
-
-  " Return closing HTML tag for given highlight id
-  function! s:HtmlClosing(id, has_extra_attrs)
-    let a = ""
-    let translated_ID = synIDtrans(a:id)
-    if synIDattr(translated_ID, "underline") | let a = a .. "</u>" | endif
-    if synIDattr(translated_ID, "italic") | let a = a .. "</i>" | endif
-    if synIDattr(translated_ID, "bold") | let a = a .. "</b>" | endif
-    if synIDattr(translated_ID, "inverse")
-      let a = a .. '</font></span>'
-    else
-      let x = s:HtmlColor(synIDattr(translated_ID, "fg#", s:whatterm))
-      if x != "" | let a = a .. '</font>' | endif
-      let x = s:HtmlColor(synIDattr(translated_ID, "bg#", s:whatterm))
-      if x != "" || a:has_extra_attrs | let a = a .. '</span>' | endif
-    endif
-    return a
-  endfun
-endif
-
-" Use a different function for formatting based on user options. This way we
-" can avoid a lot of logic during the actual execution.
-"
-" Build the function line by line containing only what is needed for the options
-" in use for maximum code sharing with minimal branch logic for greater speed.
-"
-" Note, 'exec' commands do not recognize line continuations, so must concatenate
-" lines rather than continue them.
-if s:settings.use_css
-  " save CSS to a list of rules to add to the output at the end of processing
-
-  " first, get the style names we need
-  let s:wrapperfunc_lines = []
-  call add(s:wrapperfunc_lines, [])
-  let s:wrapperfunc_lines[-1] =<< trim ENDLET
-	function! s:BuildStyleWrapper(style_id, diff_style_id, extra_attrs, text, make_unselectable, unformatted)
-	
-	  let l:style_name = synIDattr(a:style_id, "name", s:whatterm)
-  ENDLET
-  if &diff
-    call add(s:wrapperfunc_lines, [])
-    let s:wrapperfunc_lines[-1] =<< trim ENDLET
-	  let l:diff_style_name = synIDattr(a:diff_style_id, "name", s:whatterm)
-    ENDLET
-
-    " Add normal groups and diff groups to separate lists so we can order them to
-    " allow diff highlight to override normal highlight
-
-    " if primary style IS a diff style, grab it from the diff cache instead
-    " (always succeeds because we pre-populate it)
-    call add(s:wrapperfunc_lines, [])
-    let s:wrapperfunc_lines[-1] =<< trim ENDLET
-
-	  if a:style_id == s:DIFF_D_ID || a:style_id == s:DIFF_A_ID || a:style_id == s:DIFF_C_ID || a:style_id == s:DIFF_T_ID
-	    let l:saved_style = get(s:diffstylelist,a:style_id)
-	  else
-    ENDLET
-  endif
-
-  " get primary style info from cache or build it on the fly if not found
-  call add(s:wrapperfunc_lines, [])
-  let s:wrapperfunc_lines[-1] =<< trim ENDLET
-	    let l:saved_style = get(s:stylelist,a:style_id)
-	    if type(l:saved_style) == type(0)
-	      unlet l:saved_style
-	      let l:saved_style = s:CSS1(a:style_id)
-	      if l:saved_style != ""
-	        let l:saved_style = "." .. l:style_name .. " { " .. l:saved_style .. "}"
-	      endif
-	      let s:stylelist[a:style_id] = l:saved_style
-	    endif
-  ENDLET
-  if &diff
-    call add(s:wrapperfunc_lines, [])
-    let s:wrapperfunc_lines[-1] =<< trim ENDLET
-	  endif
-    ENDLET
-  endif
-" Ignore this comment, just bypassing a highlighting issue: if
-
-  " Build the wrapper tags around the text. It turns out that caching these
-  " gives pretty much zero performance gain and adds a lot of logic.
-
-  call add(s:wrapperfunc_lines, [])
-  let s:wrapperfunc_lines[-1] =<< trim ENDLET
-
-	  if l:saved_style == "" && empty(a:extra_attrs)
-  ENDLET
-  if &diff
-    call add(s:wrapperfunc_lines, [])
-    let s:wrapperfunc_lines[-1] =<< trim ENDLET
-	    if a:diff_style_id <= 0
-    ENDLET
-  endif
-  " no surroundings if neither primary nor diff style has any info
-  call add(s:wrapperfunc_lines, [])
-  let s:wrapperfunc_lines[-1] =<< trim ENDLET
-	      return a:text
-  ENDLET
-  if &diff
-    " no primary style, but diff style
-    call add(s:wrapperfunc_lines, [])
-    let s:wrapperfunc_lines[-1] =<< trim ENDLET
-	    else
-	      return '<span class="' ..l:diff_style_name .. '">'..a:text.."</span>"
-	    endif
-    ENDLET
-  endif
-  " Ignore this comment, just bypassing a highlighting issue: if
-
-  " open tag for non-empty primary style
-  call add(s:wrapperfunc_lines, [])
-  let s:wrapperfunc_lines[-1] =<< trim ENDLET
-	  else
-  ENDLET
-  " non-empty primary style. handle either empty or non-empty diff style.
-  "
-  " separate the two classes by a space to apply them both if there is a diff
-  " style name, unless the primary style is empty, then just use the diff style
-  " name
-  let s:diffstyle =
-	  \ (&diff ? '(a:diff_style_id <= 0 ? "" : " " .. l:diff_style_name)..'
-	  \        : '')
-  if s:settings.prevent_copy == ""
-    call add(s:wrapperfunc_lines, [])
-    let s:wrapperfunc_lines[-1] =<< trim eval ENDLET
-	    return "<span "..a:extra_attrs..'class="' .. l:style_name ..{s:diffstyle}'">'..a:text.."</span>"
-    ENDLET
-  else
-
-    " New method: use generated content in the CSS. The only thing needed here
-    " is a span with no content, with an attribute holding the desired text.
-    "
-    " Old method: use an <input> element when text is unsectable. This is still
-    " used in conditional comments for Internet Explorer, where the new method
-    " doesn't work.
-    "
-    " Wrap the <input> in a <span> to allow fixing the stupid bug in some fonts
-    " which cause browsers to display a 1px gap between lines when these
-    " <input>s have a background color (maybe not really a bug, this isn't
-    " well-defined)
-    "
-    " use strwidth, because we care only about how many character boxes are
-    " needed to size the input, we don't care how many characters (including
-    " separately counted composing chars, from strchars()) or bytes (from
-    " len())the string contains. strdisplaywidth() is not needed because none of
-    " the unselectable groups can contain tab characters (fold column, fold
-    " text, line number).
-    "
-    " Note, if maxlength property needs to be added in the future, it will need
-    " to use strchars(), because HTML specifies that the maxlength parameter
-    " uses the number of unique codepoints for its limit.
-    call add(s:wrapperfunc_lines, [])
-    let s:wrapperfunc_lines[-1] =<< trim eval ENDLET
-	    if a:make_unselectable
-	      let return_span = "<span "..a:extra_attrs..'class="' .. l:style_name ..{s:diffstyle}'"'
-    ENDLET
-    if s:settings.use_input_for_pc !=# 'all'
-      call add(s:wrapperfunc_lines, [])
-      let s:wrapperfunc_lines[-1] =<< trim ENDLET
-	      let return_span ..= " data-" .. l:style_name .. '-content="'..a:text..'"'
-      ENDLET
-    endif
-    call add(s:wrapperfunc_lines, [])
-    let s:wrapperfunc_lines[-1] =<< trim ENDLET
-	      let return_span ..= '>'
-    ENDLET
-    if s:settings.use_input_for_pc !=# 'none'
-      call add(s:wrapperfunc_lines, [])
-      let s:wrapperfunc_lines[-1] =<< trim eval ENDLET
-	      let return_span ..=   '<input'..s:unselInputType..' class="' .. l:style_name ..{s:diffstyle}'"'
-	      let return_span ..=   ' value="'..substitute(a:unformatted,'\s\+$',"","")..'"'
-	      let return_span ..=   " onselect='this.blur(); return false;'"
-	      let return_span ..=   " onmousedown='this.blur(); return false;'"
-	      let return_span ..=   " onclick='this.blur(); return false;'"
-	      let return_span ..=   " readonly='readonly'"
-	      let return_span ..=   ' size="'..strwidth(a:unformatted)..'"'
-	      let return_span ..=   (s:settings.use_xhtml ? '/>' : '>')
-      ENDLET
-    endif
-    call add(s:wrapperfunc_lines, [])
-    let s:wrapperfunc_lines[-1] =<< trim eval ENDLET
-	      return return_span..'</span>'
-	    else
-	      return "<span "..a:extra_attrs..'class="' .. l:style_name .. {s:diffstyle}'">'..a:text.."</span>"
-	    endif
-    ENDLET
-  endif
-  call add(s:wrapperfunc_lines, [])
-  let s:wrapperfunc_lines[-1] =<< trim ENDLET
-	  endif
-	endfun
-  ENDLET
-else
-  " Non-CSS method just needs the wrapper.
-  "
-  " Functions used to get opening/closing automatically return null strings if
-  " no styles exist.
-  if &diff
-    let s:wrapperfunc_lines =<< trim ENDLET
-	function! s:BuildStyleWrapper(style_id, diff_style_id, extra_attrs, text, unusedarg, unusedarg2)
-	  if a:diff_style_id <= 0
-	    let l:diff_opening = s:HtmlOpening(a:diff_style_id, "")
-	    let l:diff_closing = s:HtmlClosing(a:diff_style_id, 0)
-	  else
-	    let l:diff_opening = ""
-	    let l:diff_closing = ""
-	  endif
-	  return s:HtmlOpening(a:style_id, a:extra_attrs)..l:diff_opening..a:text..l:diff_closing..s:HtmlClosing(a:style_id, !empty(a:extra_attrs))
-	endfun
-    ENDLET
-  else
-    let s:wrapperfunc_lines =<< trim ENDLET
-	function! s:BuildStyleWrapper(style_id, diff_style_id, extra_attrs, text, unusedarg, unusedarg2)
-	  return s:HtmlOpening(a:style_id, a:extra_attrs)..a:text..s:HtmlClosing(a:style_id, !empty(a:extra_attrs))
-	endfun
-    ENDLET
-  endif
-endif
-
-" create the function we built line by line above
-exec join(flatten(s:wrapperfunc_lines), "\n")
-
-let s:diff_mode = &diff
-
-" Return HTML valid characters enclosed in a span of class style_name with
-" unprintable characters expanded and double spaces replaced as necessary.
-"
-" TODO: eliminate unneeded logic like done for BuildStyleWrapper
-function! s:HtmlFormat(text, style_id, diff_style_id, extra_attrs, make_unselectable)
-  " Replace unprintable characters
-  let unformatted = strtrans(a:text)
-
-  let formatted = unformatted
-
-  " Replace the reserved html characters
-  let formatted = substitute(formatted, '&', '\&amp;',  'g')
-  let formatted = substitute(formatted, '<', '\&lt;',   'g')
-  let formatted = substitute(formatted, '>', '\&gt;',   'g')
-  let formatted = substitute(formatted, '"', '\&quot;', 'g')
-  " &apos; is not valid in HTML but it is in XHTML, so just use the numeric
-  " reference for it instead. Needed because it could appear in quotes
-  " especially if unselectable regions is turned on.
-  let formatted = substitute(formatted, '"', '\&#0039;', 'g')
-
-  " Replace a "form feed" character with HTML to do a page break
-  " TODO: need to prevent this in unselectable areas? Probably it should never
-  " BE in an unselectable area...
-  let formatted = substitute(formatted, "\x0c", '<hr class="PAGE-BREAK">', 'g')
-
-  " Replace double spaces, leading spaces, and trailing spaces if needed
-  if ' ' != s:HtmlSpace
-    let formatted = substitute(formatted, '  ', s:HtmlSpace .. s:HtmlSpace, 'g')
-    let formatted = substitute(formatted, '^ ', s:HtmlSpace, 'g')
-    let formatted = substitute(formatted, ' \+$', s:HtmlSpace, 'g')
-  endif
-
-  " Enclose in the correct format
-  return s:BuildStyleWrapper(a:style_id, a:diff_style_id, a:extra_attrs, formatted, a:make_unselectable, unformatted)
-endfun
-
-" set up functions to call HtmlFormat in certain ways based on whether the
-" element is supposed to be unselectable or not
-if s:settings.prevent_copy =~# 'n'
-  if s:settings.number_lines
-    if s:settings.line_ids
-      function! s:HtmlFormat_n(text, style_id, diff_style_id, lnr)
-	if a:lnr > 0
-	  return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, 'id="'..(exists('g:html_diff_win_num') ? 'W'..g:html_diff_win_num : "")..'L'..a:lnr..s:settings.id_suffix..'" ', 1)
-	else
-	  return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, "", 1)
-	endif
-      endfun
-    else
-      function! s:HtmlFormat_n(text, style_id, diff_style_id, lnr)
-	return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, "", 1)
-      endfun
-    endif
-  elseif s:settings.line_ids
-    " if lines are not being numbered the only reason this function gets called
-    " is to put the line IDs on each line; "text" will be empty but lnr will
-    " always be non-zero, however we don't want to use the <input> because that
-    " won't work as nice for empty text
-    function! s:HtmlFormat_n(text, style_id, diff_style_id, lnr)
-      return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, 'id="'..(exists('g:html_diff_win_num') ? 'W'..g:html_diff_win_num : "")..'L'..a:lnr..s:settings.id_suffix..'" ', 0)
-    endfun
-  endif
-else
-  if s:settings.line_ids
-    function! s:HtmlFormat_n(text, style_id, diff_style_id, lnr)
-      if a:lnr > 0
-	return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, 'id="'..(exists('g:html_diff_win_num') ? 'W'..g:html_diff_win_num : "")..'L'..a:lnr..s:settings.id_suffix..'" ', 0)
-      else
-	return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, "", 0)
-      endif
-    endfun
-  else
-    function! s:HtmlFormat_n(text, style_id, diff_style_id, lnr)
-      return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, "", 0)
-    endfun
-  endif
-endif
-if s:settings.prevent_copy =~# 'd'
-  function! s:HtmlFormat_d(text, style_id, diff_style_id)
-    return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, "", 1)
-  endfun
-else
-  function! s:HtmlFormat_d(text, style_id, diff_style_id)
-    return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, "", 0)
-  endfun
-endif
-if s:settings.prevent_copy =~# 'f'
-  if s:settings.use_input_for_pc ==# 'none'
-    " Simply space-pad to the desired width inside the generated content (note
-    " that the FoldColumn definition includes a whitespace:pre rule)
-    function! s:FoldColumn_build(char, len, numfill, char2, class, click)
-      return "<a href='#' class='"..a:class.."' onclick='"..a:click.."' data-FoldColumn-content='".
-	    \ repeat(a:char, a:len)..a:char2..repeat(' ', a:numfill).
-	    \ "'></a>"
-    endfun
-    function! s:FoldColumn_fill()
-      return s:HtmlFormat(repeat(' ', s:foldcolumn), s:FOLD_C_ID, 0, "", 1)
-    endfun
-  else
-    " Note the <input> elements for fill spaces will have a single space for
-    " content, to allow active cursor CSS selection to work.
-    "
-    " Wrap the whole thing in a span for the 1px padding workaround for gaps.
-    "
-    " Build the function line by line containing only what is needed for the
-    " options in use for maximum code sharing with minimal branch logic for
-    " greater speed.
-    "
-    " Note, 'exec' commands do not recognize line continuations, so must
-    " concatenate lines rather than continue them.
-    let s:build_fun_lines = []
-    call add(s:build_fun_lines, [])
-    let s:build_fun_lines[-1] =<< trim ENDLET
-	  function! s:FoldColumn_build(char, len, numfill, char2, class, click)
-	    let l:input_open = "<input readonly='readonly'"..s:unselInputType
-	    let l:input_open ..= " onselect='this.blur(); return false;'"
-	    let l:input_open ..= " onmousedown='this.blur(); "..a:click.." return false;'"
-	    let l:input_open ..= " onclick='return false;' size='"
-	    let l:input_open ..= string(a:len + (empty(a:char2) ? 0 : 1) + a:numfill) .. "' "
-	    let l:common_attrs = "class='FoldColumn' value='"
-	    let l:input_close = (s:settings.use_xhtml ? "' />" : "'>")
-	    let l:return_span = "<span class='"..a:class.."'>"
-	    let l:return_span ..= l:input_open..l:common_attrs..repeat(a:char, a:len)..(a:char2)
-	    let l:return_span ..= l:input_close
-    ENDLET
-    if s:settings.use_input_for_pc ==# 'fallback'
-      call add(s:build_fun_lines, [])
-      let s:build_fun_lines[-1] =<< trim ENDLET
-	    let l:return_span ..= "<a href='#' class='FoldColumn' onclick='"..a:click.."'"
-	    let l:return_span ..= " data-FoldColumn-content='"
-	    let l:return_span ..= repeat(a:char, a:len)..a:char2..repeat(' ', a:numfill)
-	    let l:return_span ..= "'></a>"
-      ENDLET
-    endif
-    call add(s:build_fun_lines, [])
-    let s:build_fun_lines[-1] =<< trim ENDLET
-	    let l:return_span ..= "</span>"
-	    return l:return_span
-	  endfun
-    ENDLET
-    " create the function we built line by line above
-    exec join(flatten(s:build_fun_lines), "\n")
-
-    function! s:FoldColumn_fill()
-      return s:FoldColumn_build(' ', s:foldcolumn, 0, '', 'FoldColumn', '')
-    endfun
-  endif
-else
-  " For normal fold columns, simply space-pad to the desired width (note that
-  " the FoldColumn definition includes a whitespace:pre rule)
-  function! s:FoldColumn_build(char, len, numfill, char2, class, click)
-    return "<a href='#' class='"..a:class.."' onclick='"..a:click.."'>".
-	  \ repeat(a:char, a:len)..a:char2..repeat(' ', a:numfill).
-	  \ "</a>"
-  endfun
-  function! s:FoldColumn_fill()
-    return s:HtmlFormat(repeat(' ', s:foldcolumn), s:FOLD_C_ID, 0, "", 0)
-  endfun
-endif
-if s:settings.prevent_copy =~# 't'
-  " put an extra empty span at the end for dynamic folds, so the linebreak can
-  " be surrounded. Otherwise do it as normal.
-  "
-  " TODO: isn't there a better way to do this, than placing it here and using a
-  " substitute later?
-  if s:settings.dynamic_folds
-    function! s:HtmlFormat_t(text, style_id, diff_style_id)
-      return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, "", 1) .
-	    \ s:HtmlFormat("", a:style_id, 0, "", 0)
-    endfun
-  else
-    function! s:HtmlFormat_t(text, style_id, diff_style_id)
-      return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, "", 1)
-    endfun
-  endif
-else
-  function! s:HtmlFormat_t(text, style_id, diff_style_id)
-    return s:HtmlFormat(a:text, a:style_id, a:diff_style_id, "", 0)
-  endfun
-endif
-
-" Return CSS style describing given highlight id (can be empty)
-function! s:CSS1(id)
-  let a = ""
-  let translated_ID = synIDtrans(a:id)
-  if synIDattr(translated_ID, "inverse")
-    " For inverse, we always must set both colors (and exchange them)
-    let x = s:HtmlColor(synIDattr(translated_ID, "bg#", s:whatterm))
-    let a = a .. "color: " .. ( x != "" ? x : s:bgc ) .. "; "
-    let x = s:HtmlColor(synIDattr(translated_ID, "fg#", s:whatterm))
-    let a = a .. "background-color: " .. ( x != "" ? x : s:fgc ) .. "; "
-  else
-    let x = s:HtmlColor(synIDattr(translated_ID, "fg#", s:whatterm))
-    if x != "" | let a = a .. "color: " .. x .. "; " | endif
-    let x = s:HtmlColor(synIDattr(translated_ID, "bg#", s:whatterm))
-    if x != ""
-      let a = a .. "background-color: " .. x .. "; "
-      " stupid hack because almost every browser seems to have at least one font
-      " which shows 1px gaps between lines which have background
-      let a = a .. "padding-bottom: 1px; "
-    elseif (translated_ID == s:FOLDED_ID || translated_ID == s:LINENR_ID || translated_ID == s:FOLD_C_ID) && !empty(s:settings.prevent_copy)
-      " input elements default to a different color than the rest of the page
-      let a = a .. "background-color: " .. s:bgc .. "; "
-    endif
-  endif
-  if synIDattr(translated_ID, "bold") | let a = a .. "font-weight: bold; " | endif
-  if synIDattr(translated_ID, "italic") | let a = a .. "font-style: italic; " | endif
-  if synIDattr(translated_ID, "underline") | let a = a .. "text-decoration: underline; " | endif
-  return a
-endfun
-
-if s:settings.dynamic_folds
-  " compares two folds as stored in our list of folds
-  " A fold is "less" than another if it starts at an earlier line number,
-  " or ends at a later line number, ties broken by fold level
-  function! s:FoldCompare(f1, f2)
-    if a:f1.firstline != a:f2.firstline
-      " put it before if it starts earlier
-      return a:f1.firstline - a:f2.firstline
-    elseif a:f1.lastline != a:f2.lastline
-      " put it before if it ends later
-      return a:f2.lastline - a:f1.lastline
-    else
-      " if folds begin and end on the same lines, put lowest fold level first
-      return a:f1.level - a:f2.level
-    endif
-  endfunction
-
-endif
-
-
-" Set some options to make it work faster.
-" Don't report changes for :substitute, there will be many of them.
-" Don't change other windows; turn off scroll bind temporarily
-let s:old_title = &title
-let s:old_icon = &icon
-let s:old_et = &l:et
-let s:old_bind = &l:scrollbind
-let s:old_report = &report
-let s:old_search = @/
-let s:old_more = &more
-set notitle noicon
-setlocal et
-set nomore
-set report=1000000
-setlocal noscrollbind
-
-if exists(':ownsyntax') && exists('w:current_syntax')
-  let s:current_syntax = w:current_syntax
-elseif exists('b:current_syntax')
-  let s:current_syntax = b:current_syntax
-else
-  let s:current_syntax = 'none'
-endif
-
-if s:current_syntax == ''
-  let s:current_syntax = 'none'
-endif
-
-" If the user is sourcing this script directly then the plugin version isn't
-" known because the main plugin script didn't load. In the usual case where the
-" user still has the full Vim runtime installed, or has this full plugin
-" installed in a package or something, then we can extract the version from the
-" main plugin file at it's usual spot relative to this file. Otherwise the user
-" is assembling their runtime piecemeal and we have no idea what versions of
-" other files may be present so don't even try to make a guess or assume the
-" presence of other specific files with specific meaning.
-"
-" We don't want to actually source the main plugin file here because the user
-" may have a good reason not to (e.g. they define their own TOhtml command or
-" something).
-"
-" If this seems way too complicated and convoluted, it is. Probably I should
-" have put the version information in the autoload file from the start. But the
-" version has been in the global variable for so long that changing it could
-" break a lot of user scripts.
-if exists("g:loaded_2html_plugin")
-  let s:pluginversion = g:loaded_2html_plugin
-else
-  if !exists("g:unloaded_tohtml_plugin")
-    let s:main_plugin_path = expand("<sfile>:p:h:h").."/plugin/tohtml.vim"
-    if filereadable(s:main_plugin_path)
-      let s:lines = readfile(s:main_plugin_path, "", 20)
-      call filter(s:lines, 'v:val =~ "loaded_2html_plugin = "')
-      if empty(s:lines)
-	let g:unloaded_tohtml_plugin = "unknown"
-      else
-	let g:unloaded_tohtml_plugin = substitute(s:lines[0], '.*loaded_2html_plugin = \([''"]\)\(\%(\1\@!.\)\+\)\1', '\2', '')
-      endif
-      unlet s:lines
-    else
-      let g:unloaded_tohtml_plugin = "unknown"
-    endif
-    unlet s:main_plugin_path
-  endif
-  let s:pluginversion = g:unloaded_tohtml_plugin
-endif
-
-" Split window to create a buffer with the HTML file.
-let s:orgbufnr = winbufnr(0)
-let s:origwin_stl = &l:stl
-if expand("%") == ""
-  if exists('g:html_diff_win_num')
-    exec 'new Untitled_win'..g:html_diff_win_num..'.'.(s:settings.use_xhtml ? 'xhtml' : 'html')
-  else
-    exec 'new Untitled.'..(s:settings.use_xhtml ? 'xhtml' : 'html')
-  endif
-else
-  exec 'new %.'..(s:settings.use_xhtml ? 'xhtml' : 'html')
-endif
-
-" Resize the new window to very small in order to make it draw faster
-let s:old_winheight = winheight(0)
-let s:old_winfixheight = &l:winfixheight
-if s:old_winheight > 2
-  resize 1 " leave enough room to view one line at a time
-  norm! G
-  norm! zt
-endif
-setlocal winfixheight
-
-let s:newwin_stl = &l:stl
-
-" on the new window, set the least time-consuming fold method
-let s:old_fen = &foldenable
-setlocal foldmethod=manual
-setlocal nofoldenable
-
-let s:newwin = winnr()
-let s:orgwin = bufwinnr(s:orgbufnr)
-
-setlocal modifiable
-%d
-let s:old_paste = &paste
-set paste
-let s:old_magic = &magic
-set magic
-
-" set the fileencoding to match the charset we'll be using
-let &l:fileencoding=s:settings.vim_encoding
-
-" According to http://www.w3.org/TR/html4/charset.html#doc-char-set, the byte
-" order mark is highly recommend on the web when using multibyte encodings. But,
-" it is not a good idea to include it on UTF-8 files. Otherwise, let Vim
-" determine when it is actually inserted.
-if s:settings.vim_encoding == 'utf-8'
-  setlocal nobomb
-else
-  setlocal bomb
-endif
-
-let s:lines = []
-
-if s:settings.use_xhtml
-  if s:settings.encoding != ""
-    call add(s:lines, "<?xml version=\"1.0\" encoding=\"" .. s:settings.encoding .. "\"?>")
-  else
-    call add(s:lines, "<?xml version=\"1.0\"?>")
-  endif
-  let s:tag_close = ' />'
-else
-  let s:tag_close = '>'
-endif
-
-let s:HtmlSpace = ' '
-let s:LeadingSpace = ' '
-let s:HtmlEndline = ''
-if s:settings.no_pre
-  let s:HtmlEndline = '<br' .. s:tag_close
-  let s:LeadingSpace = s:settings.use_xhtml ? '&#160;' : '&nbsp;'
-  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.
-if !s:settings.no_doc
-  call extend(s:lines, [
-	\ "<html>",
-	\ "<head>"])
-  " include encoding as close to the top as possible, but only if not already
-  " contained in XML information (to avoid haggling over content type)
-  if s:settings.encoding != "" && !s:settings.use_xhtml
-    if s:html5
-      call add(s:lines, '<meta charset="' .. s:settings.encoding .. '"' .. s:tag_close)
-    else
-      call add(s:lines, "<meta http-equiv=\"content-type\" content=\"text/html; charset=" .. s:settings.encoding .. '"' .. s:tag_close)
-    endif
-  endif
-  call extend(s:lines, [
-	\ ("<title>"..expand("%:p:~").."</title>"),
-	\ ("<meta name=\"Generator\" content=\"Vim/"..v:version/100.."."..v:version%100..'"'..s:tag_close),
-	\ ("<meta name=\"plugin-version\" content=\""..s:pluginversion..'"'..s:tag_close)
-	\ ])
-  call add(s:lines, '<meta name="syntax" content="'..s:current_syntax..'"'..s:tag_close)
-  call add(s:lines, '<meta name="settings" content="'..
-	\ join(filter(keys(s:settings),'s:settings[v:val]'),',')..