vim-patch:f0d58efc9dc4

Update runtime files.
https://github.com/vim/vim/commit/f0d58efc9dc46be37c629cbc99b4125448ca39fd

9 files changed, 244 insertions, 161 deletions

diff --git a/runtime/autoload/tohtml.vim b/runtime/autoload/tohtml.vim
index d972ad63fe..2d874c690d 100644
--- a/runtime/autoload/tohtml.vim
+++ b/runtime/autoload/tohtml.vim
@@ -1,6 +1,6 @@
 " Vim autoload file for the tohtml plugin.
 " Maintainer: Ben Fritz <fritzophrenic@gmail.com>
-" Last Change: 2013 Sep 03
+" Last Change: 2018 Nov 11
 "
 " Additional contributors:
 "
@@ -544,12 +544,16 @@ func! tohtml#Diff2HTML(win_list, buf_list) "{{{
     " add required javascript in reverse order so we can just call append again
     " and again without adjusting {{{
 
-    " insert script closing tag
-    call append(style_start, [
-	  \ '',
-	  \ s:settings.use_xhtml ? '//]]>' : '-->',
-	  \ "</script>"
-	  \ ])
+    let s:uses_script = s:settings.dynamic_folds || s:settings.line_ids || !empty(s:settings.prevent_copy)
+
+    " insert script closing tag if needed
+    if s:uses_script
+      call append(style_start, [
+	    \ '',
+	    \ s:settings.use_xhtml ? '//]]>' : '-->',
+	    \ "</script>"
+	    \ ])
+    endif
 
     " insert script which corrects the size of small input elements in
     " prevent_copy mode. See 2html.vim for details on why this is needed and how
@@ -575,55 +579,61 @@ func! tohtml#Diff2HTML(win_list, buf_list) "{{{
 	    \ '}'
 	    \ ])
     endif
-    "
+
     " insert javascript to get IDs from line numbers, and to open a fold before
     " jumping to any lines contained therein
-    call append(style_start, [
-	  \ "  /* Always jump to new location even if the line was hidden inside a fold, or",
-	  \ "   * we corrected the raw number to a line ID.",
-	  \ "   */",
-	  \ "  if (lineElem) {",
-	  \ "    lineElem.scrollIntoView(true);",
-	  \ "  }",
-	  \ "  return true;",
-	  \ "}",
-	  \ "if ('onhashchange' in window) {",
-	  \ "  window.onhashchange = JumpToLine;",
-	  \ "}"
-	  \ ])
-    if s:settings.dynamic_folds
+    if s:settings.line_ids
+      call append(style_start, [
+	    \ "  /* Always jump to new location even if the line was hidden inside a fold, or",
+	    \ "   * we corrected the raw number to a line ID.",
+	    \ "   */",
+	    \ "  if (lineElem) {",
+	    \ "    lineElem.scrollIntoView(true);",
+	    \ "  }",
+	    \ "  return true;",
+	    \ "}",
+	    \ "if ('onhashchange' in window) {",
+	    \ "  window.onhashchange = JumpToLine;",
+	    \ "}"
+	    \ ])
+
+      if s:settings.dynamic_folds
+	call append(style_start, [
+	      \ "",
+	      \ "  /* navigate upwards in the DOM tree to open all folds containing the line */",
+	      \ "  var node = lineElem;",
+	      \ "  while (node && node.id != 'vimCodeElement".s:settings.id_suffix."')",
+	      \ "  {",
+	      \ "    if (node.className == 'closed-fold')",
+	      \ "    {",
+	      \ "      /* toggle open the fold ID (remove window ID) */",
+	      \ "      toggleFold(node.id.substr(4));",
+	      \ "    }",
+	      \ "    node = node.parentNode;",
+	      \ "  }",
+	      \ ])
+      endif
+    endif
+
+    if s:settings.line_ids
       call append(style_start, [
 	    \ "",
-	    \ "  /* navigate upwards in the DOM tree to open all folds containing the line */",
-	    \ "  var node = lineElem;",
-	    \ "  while (node && node.id != 'vimCodeElement".s:settings.id_suffix."')",
-	    \ "  {",
-	    \ "    if (node.className == 'closed-fold')",
-	    \ "    {",
-	    \ "      /* toggle open the fold ID (remove window ID) */",
-	    \ "      toggleFold(node.id.substr(4));",
-	    \ "    }",
-	    \ "    node = node.parentNode;",
+	    \ "/* function to open any folds containing a jumped-to line before jumping to it */",
+	    \ "function JumpToLine()",
+	    \ "{",
+	    \ "  var lineNum;",
+	    \ "  lineNum = window.location.hash;",
+	    \ "  lineNum = lineNum.substr(1); /* strip off '#' */",
+	    \ "",
+	    \ "  if (lineNum.indexOf('L') == -1) {",
+	    \ "    lineNum = 'L'+lineNum;",
+	    \ "  }",
+	    \ "  if (lineNum.indexOf('W') == -1) {",
+	    \ "    lineNum = 'W1'+lineNum;",
 	    \ "  }",
+	    \ "  var lineElem = document.getElementById(lineNum);"
 	    \ ])
     endif
-    call append(style_start, [
-	  \ "",
-	  \ "/* function to open any folds containing a jumped-to line before jumping to it */",
-	  \ "function JumpToLine()",
-	  \ "{",
-	  \ "  var lineNum;",
-	  \ "  lineNum = window.location.hash;",
-	  \ "  lineNum = lineNum.substr(1); /* strip off '#' */",
-	  \ "",
-	  \ "  if (lineNum.indexOf('L') == -1) {",
-	  \ "    lineNum = 'L'+lineNum;",
-	  \ "  }",
-	  \ "  if (lineNum.indexOf('W') == -1) {",
-	  \ "    lineNum = 'W1'+lineNum;",
-	  \ "  }",
-	  \ "  lineElem = document.getElementById(lineNum);"
-	  \ ])
 
     " Insert javascript to toggle matching folds open and closed in all windows,
     " if dynamic folding is active.
@@ -648,11 +658,13 @@ func! tohtml#Diff2HTML(win_list, buf_list) "{{{
 	    \ ])
     endif
 
-    " insert script tag; javascript is always needed for the line number
-    " normalization for URL hashes
-    call append(style_start, [
-	  \ "<script type='text/javascript'>",
-	  \ s:settings.use_xhtml ? '//<![CDATA[' : "<!--"])
+    if s:uses_script
+      " insert script tag; javascript is always needed for the line number
+      " normalization for URL hashes
+      call append(style_start, [
+	    \ "<script type='text/javascript'>",
+	    \ s:settings.use_xhtml ? '//<![CDATA[' : "<!--"])
+    endif
 
     " Insert styles from all the generated html documents and additional styles
     " for the table-based layout of the side-by-side diff. The diff should take
@@ -767,7 +779,7 @@ func! tohtml#GetUserSettings() "{{{
     if user_settings.no_pre == 0
       call tohtml#GetOption(user_settings,
 	    \ 'expand_tabs',
-	    \ &expandtab || &ts != 8 || user_settings.number_lines ||
+	    \ &expandtab || &ts != 8 || &vts != '' || user_settings.number_lines ||
 	    \   (user_settings.dynamic_folds && !user_settings.no_foldcolumn))
     else
       let user_settings.expand_tabs = 1
diff --git a/runtime/doc/indent.txt b/runtime/doc/indent.txt
index 952033d1b8..721aa93442 100644
--- a/runtime/doc/indent.txt
+++ b/runtime/doc/indent.txt
@@ -600,14 +600,14 @@ the use of square and curly brackets, and otherwise by community convention.
 These conventions are not universally followed, so the Clojure indent script
 offers a few configurable options, listed below.
 
-If the current vim does not include searchpairpos(), the indent script falls
+If the current vim does not include |searchpairpos()|, the indent script falls
 back to normal 'lisp' indenting, and the following options are ignored.
 
 							*g:clojure_maxlines*
 
-Set maximum scan distance of searchpairpos(). Larger values trade performance
-for correctness when dealing with very long forms. A value of 0 will scan
-without limits.
+Set maximum scan distance of |searchpairpos()|. Larger values trade
+performance for correctness when dealing with very long forms. A value of 0
+will scan without limits.
 >
 	" Default
 	let g:clojure_maxlines = 100
@@ -933,14 +933,14 @@ given are the defaults.  Note that the variables are set to an expression, so
 that you can change the value of 'shiftwidth' later.
 
 Indent after an open paren: >
-	let g:pyindent_open_paren = '&sw * 2'
+	let g:pyindent_open_paren = 'shiftwidth() * 2'
 Indent after a nested paren: >
-	let g:pyindent_nested_paren = '&sw'
+	let g:pyindent_nested_paren = 'shiftwidth()'
 Indent for a continuation line: >
-	let g:pyindent_continue = '&sw * 2'
+	let g:pyindent_continue = 'shiftwidth() * 2'
 
-The method uses searchpair() to look back for unclosed parenthesis.  This can
-sometimes be slow, thus it timeouts after 150 msec.  If you notice the
+The method uses |searchpair()| to look back for unclosed parenthesis.  This
+can sometimes be slow, thus it timeouts after 150 msec.  If you notice the
 indenting isn't correct, you can set a larger timeout in msec: >
 	let g:pyindent_searchpair_timeout = 500
 
@@ -1036,7 +1036,7 @@ Furthermore, setting the variable b:verilog_indent_width to change the
 indenting width (default is 'shiftwidth'): >
 
   let b:verilog_indent_width = 4
-  let b:verilog_indent_width = &sw * 2
+  let b:verilog_indent_width = shiftwidth() * 2
 
 In addition, you can turn the verbose mode for debug issue: >
 
@@ -1159,7 +1159,7 @@ VIM							*ft-vim-indent*
 For indenting Vim scripts there is one variable that specifies the amount of
 indent for a continuation line, a line that starts with a backslash: >
 
-	:let g:vim_indent_cont = &sw * 3
+	:let g:vim_indent_cont = shiftwidth() * 3
 
 Three times shiftwidth is the default value.
 
diff --git a/runtime/doc/motion.txt b/runtime/doc/motion.txt
index d5a123e3ea..eacd08760b 100644
--- a/runtime/doc/motion.txt
+++ b/runtime/doc/motion.txt
@@ -993,7 +993,7 @@ remembered.  You can return to that position with the "''" and "``" command,
 unless the line containing that position was changed or deleted.  The
 following commands are "jump" commands: "'", "`", "G", "/", "?", "n", "N",
 "%", "(", ")", "[[", "]]", "{", "}", ":s", ":tag", "L", "M", "H" and the
-commands that start editing a new file. 
+commands that start editing a new file.
 
 							*CTRL-O*
 CTRL-O			Go to [count] Older cursor position in jump list
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index f8a6ee4a48..4378e22117 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1935,7 +1935,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 				diff library.
 
                 algorithm:{text} Use the specified diff algorithm with the
-				internal diff engine. Currently supported 
+				internal diff engine. Currently supported
 				algorithms are:
 				myers      the default algorithm
 				minimal    spend extra time to generate the
@@ -6217,10 +6217,11 @@ A jump table for the options with a short description can be found at |Q_op|.
 'thesaurus' 'tsr'	string	(default "")
 			global or local to buffer |global-local|
 	List of file names, separated by commas, that are used to lookup words
-	for thesaurus completion commands |i_CTRL-X_CTRL-T|.  Each line in
-	the file should contain words with similar meaning, separated by
-	non-keyword characters (white space is preferred).  Maximum line
-	length is 510 bytes.
+	for thesaurus completion commands |i_CTRL-X_CTRL-T|.
+
+	Each line in the file should contain words with similar meaning,
+	separated by non-keyword characters (white space is preferred).
+	Maximum line length is 510 bytes.
 
 	To include a comma in a file name precede it with a backslash.  Spaces
 	after a comma are ignored, otherwise spaces are included in the file
diff --git a/runtime/doc/pattern.txt b/runtime/doc/pattern.txt
index 022dc5607e..4322364fca 100644
--- a/runtime/doc/pattern.txt
+++ b/runtime/doc/pattern.txt
@@ -295,7 +295,7 @@ the "*" is under your right hand middle finger (search to the right and down).
 
 								*E956*
 In very rare cases a regular expression is used recursively.  This can happen
-when executing a pattern takes a long time and when checkig for messages on
+when executing a pattern takes a long time and when checking for messages on
 channels a callback is invoked that also uses a pattern or an autocommand is
 triggered.  In most cases this should be fine, but if a pattern is in use when
 it's used again it fails.  Usually this means there is something wrong with
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 4564d84955..a377d57a5a 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -649,12 +649,12 @@ the rendered page generated by 2html.vim.
    :let g:html_no_pre = 1
 <
 							  *g:html_expand_tabs*
-Default: 1 if 'tabstop' is 8, 'expandtab' is 0, and no fold column or line
-		numbers occur in the generated HTML;
-	 0 otherwise.
-When 0, <Tab> characters in the buffer text are replaced with an appropriate
+Default: 0 if 'tabstop' is 8, 'expandtab' is 0, 'vartabstop' is not in use,
+	       and no fold column or line numbers occur in the generated HTML;
+	 1 otherwise.
+When 1, <Tab> characters in the buffer text are replaced with an appropriate
 number of space characters, or &nbsp; references if |g:html_no_pre| is 1.
-When 1, if |g:html_no_pre| is 0 or unset, <Tab> characters in the buffer text
+When 0, if |g:html_no_pre| is 0 or unset, <Tab> characters in the buffer text
 are included as-is in the generated HTML. This is useful for when you want to
 allow copy and paste from a browser without losing the actual whitespace in
 the source document. Note that this can easily break text alignment and
@@ -752,6 +752,8 @@ When 1, generate XHTML 1.0 instead (XML compliant HTML).
     :let g:html_use_xhtml = 1
 <
 
+ vim:tw=78:sw=4:ts=8:sts=4:ft=help:norl:ai:noet:
+
 ABEL						*abel.vim* *ft-abel-syntax*
 
 ABEL highlighting provides some user-defined options.  To enable them, assign
diff --git a/runtime/doc/tagsrch.txt b/runtime/doc/tagsrch.txt
index a4526a7f2c..f63535af11 100644
--- a/runtime/doc/tagsrch.txt
+++ b/runtime/doc/tagsrch.txt
@@ -173,8 +173,8 @@ commands explained above the tag stack will look like this:
    1  1 main		1  harddisk2:text/vim/test
    2  1 FuncB	       59  harddisk2:text/vim/src/main.c
 
-The gettagstack() function returns the tag stack of a specified window. The
-settagstack() function modifies the tag stack of a window.
+The |gettagstack()| function returns the tag stack of a specified window. The
+|settagstack()| function modifies the tag stack of a window.
 
 							*E73*
 When you try to use the tag stack while it doesn't contain anything you will
diff --git a/runtime/plugin/tohtml.vim b/runtime/plugin/tohtml.vim
index b438dea811..0cd931eada 100644
--- a/runtime/plugin/tohtml.vim
+++ b/runtime/plugin/tohtml.vim
@@ -1,82 +1,33 @@
 " Vim plugin for converting a syntax highlighted file to HTML.
 " Maintainer: Ben Fritz <fritzophrenic@gmail.com>
-" Last Change: 2015 Sep 08
+" Last Change: 2018 Nov 11
 "
 " The core of the code is in $VIMRUNTIME/autoload/tohtml.vim and
 " $VIMRUNTIME/syntax/2html.vim
 "
-" TODO: {{{
-"   * Options for generating the CSS in external style sheets. New :TOcss
-"     command to convert the current color scheme into a (mostly) generic CSS
-"     stylesheet which can be re-used. Alternate stylesheet support? Good start
-"     by Erik Falor
-"     ( https://groups.google.com/d/topic/vim_use/7XTmC4D22dU/discussion ).
-"   * Add optional argument to :TOhtml command to specify mode (gui, cterm,
-"     term) to use for the styling. Suggestion by "nacitar".
-"   * Add way to override or specify which RGB colors map to the color numbers
-"     in cterm. Get better defaults than just guessing? Suggestion by "nacitar".
-"   * Disable filetype detection until after all processing is done.
-"   * Add option for not generating the hyperlink on stuff that looks like a
-"     URL? Or just color the link to fit with the colorscheme (and only special
-"     when hovering)?
-"   * Bug: Opera does not allow printing more than one page if uncopyable
-"     regions is turned on. Possible solution: Add normal text line numbers with
-"     display:none, set to display:inline for print style sheets, and hide
-"     <input> elements for print, to allow Opera printing multiple pages (and
-"     other uncopyable areas?). May need to make the new text invisible to IE
-"     with conditional comments to prevent copying it, IE for some reason likes
-"     to copy hidden text. Other browsers too?
-"   * Bug: still a 1px gap throughout the fold column when html_prevent_copy is
-"     "fn" in some browsers. Specifically, in Chromium on Ubuntu (but not Chrome
-"     on Windows). Perhaps it is font related?
-"   * Bug: still some gaps in the fold column when html_prevent_copy contains
-"     'd' and showing the whole diff (observed in multiple browsers). Only gaps
-"     on diff lines though.
-"   * Undercurl support via CSS3, with fallback to dotted or something:
-"	https://groups.google.com/d/topic/vim_use/BzXA6He1pHg/discussion
-"   * Redo updates for modified default foldtext (v11) when/if the patch is
-"     accepted to modify it.
-"   * Test case +diff_one_file-dynamic_folds+expand_tabs-hover_unfold
-"		+ignore_conceal-ignore_folding+no_foldcolumn+no_pre+no_progress
-"		+number_lines-pre_wrap-use_css+use_xhtml+whole_filler.xhtml
-"     does not show the whole diff filler as it is supposed to?
-"   * Bug: when 'isprint' is wrong for the current encoding, will generate
-"     invalid content. Can/should anything be done about this? Maybe a separate
-"     plugin to correct 'isprint' based on encoding?
-"   * Check to see if the windows-125\d encodings actually work in Unix without
-"     the 8bit- prefix. Add prefix to autoload dictionaries for Unix if not.
-"   * Font auto-detection similar to
-"     http://www.vim.org/scripts/script.php?script_id=2384 but for a variety of
-"     platforms.
-"   * Error thrown when sourcing 2html.vim directly when plugins are not loaded.
-"   * Pull in code from http://www.vim.org/scripts/script.php?script_id=3113 :
-"	- listchars support
-"	- full-line background highlight
-"	- other?
-"   * Make it so deleted lines in a diff don't create side-scrolling (get it
-"     free with full-line background highlight above).
-"   * Restore open/closed folds and cursor position after processing each file
-"     with option not to restore for speed increase.
-"   * Add extra meta info (generation time, etc.)?
-"   * Tidy up so we can use strict doctype in even more situations
-"   * Implementation detail: add threshold for writing the lines to the html
-"     buffer before we're done (5000 or so lines should do it)
-"   * TODO comments for code cleanup scattered throughout
-"}}}
-
 if exists('g:loaded_2html_plugin')
   finish
 endif
-let g:loaded_2html_plugin = 'vim7.4_v2'
+let g:loaded_2html_plugin = 'vim8.1_v1'
 
 "
 " Changelog: {{{
-"   7.4_v2  (this version): Fix error raised when converting a diff containing
+"   8.1_v1  (this version): Fix Bitbucket issue #6: Don't generate empty script
+"                           tag.
+"                           Fix Bitbucket issue #5: javascript should
+"                           declare variables with "var".
+"                           Fix Bitbucket issue #13: errors thrown sourcing
+"                           2html.vim directly when plugins not loaded.
+"                           Fix Bitbucket issue #16: support 'vartabstop'.
+"
+"   7.4 updates: {{{
+"   7.4_v2  (Vim 7.4.0899): Fix error raised when converting a diff containing
 "                           an empty buffer. Jan Stocker: allow g:html_font to
 "                           take a list so it is easier to specfiy fallback
 "                           fonts in the generated CSS.
 "   7.4_v1  (Vim 7.4.0000): Fix modeline mangling for new "Vim:" format, and
 "			    also for version-specific modelines like "vim>703:".
+"}}}
 "
 "   7.3 updates: {{{
 "   7.3_v14 (Vim 7.3.1246): Allow suppressing line number anchors using
@@ -170,9 +121,69 @@ let g:loaded_2html_plugin = 'vim7.4_v2'
 "}}}
 "}}}
 
+" TODO: {{{
+"   * Check the issue tracker:
+"     https://bitbucket.org/fritzophrenic/vim-tohtml/issues?status=new&status=open
+"   * Options for generating the CSS in external style sheets. New :TOcss
+"     command to convert the current color scheme into a (mostly) generic CSS
+"     stylesheet which can be re-used. Alternate stylesheet support? Good start
+"     by Erik Falor
+"     ( https://groups.google.com/d/topic/vim_use/7XTmC4D22dU/discussion ).
+"   * Add optional argument to :TOhtml command to specify mode (gui, cterm,
+"     term) to use for the styling. Suggestion by "nacitar".
+"   * Add way to override or specify which RGB colors map to the color numbers
+"     in cterm. Get better defaults than just guessing? Suggestion by "nacitar".
+"   * Disable filetype detection until after all processing is done.
+"   * Add option for not generating the hyperlink on stuff that looks like a
+"     URL? Or just color the link to fit with the colorscheme (and only special
+"     when hovering)?
+"   * Bug: Opera does not allow printing more than one page if uncopyable
+"     regions is turned on. Possible solution: Add normal text line numbers with
+"     display:none, set to display:inline for print style sheets, and hide
+"     <input> elements for print, to allow Opera printing multiple pages (and
+"     other uncopyable areas?). May need to make the new text invisible to IE
+"     with conditional comments to prevent copying it, IE for some reason likes
+"     to copy hidden text. Other browsers too?
+"   * Bug: still a 1px gap throughout the fold column when html_prevent_copy is
+"     "fn" in some browsers. Specifically, in Chromium on Ubuntu (but not Chrome
+"     on Windows). Perhaps it is font related?
+"   * Bug: still some gaps in the fold column when html_prevent_copy contains
+"     'd' and showing the whole diff (observed in multiple browsers). Only gaps
+"     on diff lines though.
+"   * Undercurl support via CSS3, with fallback to dotted or something:
+"	https://groups.google.com/d/topic/vim_use/BzXA6He1pHg/discussion
+"   * Redo updates for modified default foldtext (v11) when/if the patch is
+"     accepted to modify it.
+"   * Test case +diff_one_file-dynamic_folds+expand_tabs-hover_unfold
+"		+ignore_conceal-ignore_folding+no_foldcolumn+no_pre+no_progress
+"		+number_lines-pre_wrap-use_css+use_xhtml+whole_filler.xhtml
+"     does not show the whole diff filler as it is supposed to?
+"   * Bug: when 'isprint' is wrong for the current encoding, will generate
+"     invalid content. Can/should anything be done about this? Maybe a separate
+"     plugin to correct 'isprint' based on encoding?
+"   * Check to see if the windows-125\d encodings actually work in Unix without
+"     the 8bit- prefix. Add prefix to autoload dictionaries for Unix if not.
+"   * Font auto-detection similar to
+"     http://www.vim.org/scripts/script.php?script_id=2384 but for a variety of
+"     platforms.
+"   * Pull in code from http://www.vim.org/scripts/script.php?script_id=3113 :
+"	- listchars support
+"	- full-line background highlight
+"	- other?
+"   * Make it so deleted lines in a diff don't create side-scrolling (get it
+"     free with full-line background highlight above).
+"   * Restore open/closed folds and cursor position after processing each file
+"     with option not to restore for speed increase.
+"   * Add extra meta info (generation time, etc.)?
+"   * Tidy up so we can use strict doctype in even more situations
+"   * Implementation detail: add threshold for writing the lines to the html
+"     buffer before we're done (5000 or so lines should do it)
+"   * TODO comments for code cleanup scattered throughout
+"}}}
+
 " Define the :TOhtml command when:
 " - 'compatible' is not set
-" - this plugin was not already loaded
+" - this plugin or user override was not already loaded
 " - user commands are available. {{{
 if !&cp && !exists(":TOhtml") && has("user_commands")
   command -range=% -bar TOhtml :call tohtml#Convert2HTML(<line1>, <line2>)
diff --git a/runtime/syntax/2html.vim b/runtime/syntax/2html.vim
index ddc7819be2..4a2d1d3959 100644
--- a/runtime/syntax/2html.vim
+++ b/runtime/syntax/2html.vim
@@ -1,6 +1,6 @@
 " Vim syntax support file
 " Maintainer: Ben Fritz <fritzophrenic@gmail.com>
-" Last Change: 2015 Sep 08
+" Last Change: 2018 Nov 11
 "
 " Additional contributors:
 "
@@ -633,6 +633,45 @@ 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
@@ -721,7 +760,7 @@ 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=\"".g:loaded_2html_plugin.'"'.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="'.
@@ -807,12 +846,15 @@ if s:settings.use_css
   endif
 endif
 
-" insert script tag; javascript is always needed for the line number
-" normalization for URL hashes
-call extend(s:lines, [
-      \ "",
-      \ "<script type='text/javascript'>",
-      \ s:settings.use_xhtml ? '//<![CDATA[' : "<!--"])
+let s:uses_script = s:settings.dynamic_folds || s:settings.line_ids || !empty(s:settings.prevent_copy)
+
+" insert script tag if needed
+if s:uses_script
+  call extend(s:lines, [
+        \ "",
+        \ "<script type='text/javascript'>",
+        \ s:settings.use_xhtml ? '//<![CDATA[' : "<!--"])
+endif
 
 " insert javascript to toggle folds open and closed
 if s:settings.dynamic_folds
@@ -849,8 +891,9 @@ if s:settings.line_ids
 	\ "  if (lineNum.indexOf('L') == -1) {",
 	\ "    lineNum = 'L'+lineNum;",
 	\ "  }",
-	\ "  lineElem = document.getElementById(lineNum);"
+	\ "  var lineElem = document.getElementById(lineNum);"
 	\ ])
+
   if s:settings.dynamic_folds
     call extend(s:lines, [
 	  \ "",
@@ -940,12 +983,14 @@ if !empty(s:settings.prevent_copy)
 	\ ])
 endif
 
-" insert script closing tag
-call extend(s:lines, [
-      \ '',
-      \ s:settings.use_xhtml ? '//]]>' : '-->',
-      \ "</script>"
-      \ ])
+" insert script closing tag if needed
+if s:uses_script
+  call extend(s:lines, [
+        \ '',
+        \ s:settings.use_xhtml ? '//]]>' : '-->',
+        \ "</script>"
+        \ ])
+endif
 
 call extend(s:lines, ["</head>"])
 if !empty(s:settings.prevent_copy)
@@ -1525,10 +1570,22 @@ while s:lnum <= s:end
 	if s:settings.expand_tabs
 	  let s:offset = 0
 	  let s:idx = stridx(s:expandedtab, "\t")
+	  let s:tablist = split(&vts,',')
+	  if empty(s:tablist)
+	    let s:tablist = [ &ts ]
+	  endif
+	  let s:tabidx = 0
+	  let s:tabwidth = 0
 	  while s:idx >= 0
+	    while s:startcol+s:idx > s:tabwidth + s:tablist[s:tabidx] 
+	      let s:tabwidth += s:tablist[s:tabidx]
+	      if s:tabidx < len(s:tablist)-1
+		let s:tabidx = s:tabidx+1
+	      endif
+	    endwhile
 	    if has("multi_byte_encoding")
 	      if s:startcol + s:idx == 1
-		let s:i = &ts
+		let s:i = s:tablist[s:tabidx]
 	      else
 		if s:idx == 0
 		  let s:prevc = matchstr(s:line, '.\%' . (s:startcol + s:idx + s:offset) . 'c')
@@ -1536,11 +1593,11 @@ while s:lnum <= s:end
 		  let s:prevc = matchstr(s:expandedtab, '.\%' . (s:idx + 1) . 'c')
 		endif
 		let s:vcol = virtcol([s:lnum, s:startcol + s:idx + s:offset - len(s:prevc)])
-		let s:i = &ts - (s:vcol % &ts)
+		let s:i = s:tablist[s:tabidx] - (s:vcol - s:tabwidth)
 	      endif
 	      let s:offset -= s:i - 1
 	    else
-	      let s:i = &ts - ((s:idx + s:startcol - 1) % &ts)
+	      let s:i = s:tablist[s:tabidx] - ((s:idx + s:startcol - 1) - s:tabwidth)
 	    endif
 	    let s:expandedtab = substitute(s:expandedtab, '\t', repeat(' ', s:i), '')
 	    let s:idx = stridx(s:expandedtab, "\t")