patch 9.1.0592: runtime: filetype: Mediawiki files are not recognizedv9.1.0592

Problem:  filetype: Mediawiki files are not recognized
Solution: detect "*.mw" and "*.wiki" as mediawiki filetype,
          include basic syntax and filetype plugins.
          (AvidSeeker)

closes: #15266

Signed-off-by: AvidSeeker <avidseeker7@protonmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

7 files changed, 355 insertions, 6 deletions

diff --git a/.github/MAINTAINERS b/.github/MAINTAINERS
index 9f9438cdec..eb94cb715a 100644
--- a/.github/MAINTAINERS
+++ b/.github/MAINTAINERS
@@ -201,6 +201,7 @@ runtime/ftplugin/lynx.vim		@dkearns
 runtime/ftplugin/m3build.vim		@dkearns
 runtime/ftplugin/m3quake.vim		@dkearns
 runtime/ftplugin/markdown.vim		@tpope
+runtime/ftplugin/mediawiki.vim		@avidseeker
 runtime/ftplugin/meson.vim		@Liambeguin
 runtime/ftplugin/modula2.vim		@dkearns
 runtime/ftplugin/modula3.vim		@dkearns
@@ -480,6 +481,7 @@ runtime/syntax/make.vim			@rohieb
 runtime/syntax/mallard.vim		@jhradilek
 runtime/syntax/markdown.vim		@tpope
 runtime/syntax/mason.vim		@petdance
+runtime/syntax/mediawiki.vim		@avidseeker
 runtime/syntax/meson.vim		@Liambeguin
 runtime/syntax/modula2.vim		@dkearns
 runtime/syntax/modula2/opt/iso.vim	@trijezdci
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index d96cc67cb6..0bbba4db6f 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 9.1.  Last change: 2024 Jul 15
+*syntax.txt*	For Vim version 9.1.  Last change: 2024 Jul 16
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -2319,6 +2319,17 @@ have the following in your .vimrc: >
 
 	let filetype_m = "mma"
 
+MEDIAWIKI					*ft-mediawiki-syntax*
+
+Be default, syntax highlighting includes basic HTML tags like style and
+headers |html.vim|. For strict Mediawiki syntax highlighting: >
+
+	let g:html_no_rendering = 1
+
+If HTML highlighting is desired, terminal-based text formatting such as bold
+and italic is possible by: >
+
+	let g:html_style_rendering = 1
 
 MODULA2					*modula2.vim* *ft-modula2-syntax*
 
diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 0cc0a62c93..3578e01c1e 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -810,10 +810,6 @@ au BufNewFile,BufRead *.fish			setf fish
 " Flatpak config
 au BufNewFile,BufRead */flatpak/repo/config	setf dosini
 
-" FlexWiki - disabled, because it has side effects when a .wiki file
-" is not actually FlexWiki
-"au BufNewFile,BufRead *.wiki			setf flexwiki
-
 " Focus Executable
 au BufNewFile,BufRead *.fex,*.focexec		setf focexec
 
@@ -1430,6 +1426,9 @@ au BufNewFile,BufRead .mbsyncrc			setf conf
 " mcmeta
 au BufNewFile,BufRead *.mcmeta			setf json
 
+" MediaWiki
+au BufNewFile,BufRead *.mw,*.wiki		setf mediawiki
+
 " Mercurial (hg) commit file
 au BufNewFile,BufRead hg-editor-*.txt		setf hgcommit
 
@@ -2419,7 +2418,7 @@ au BufNewFile,BufRead *.tcl,*.tm,*.tk,*.itcl,*.itk,*.jacl,.tclshrc,.wishrc,.tcls
 " Xilinx's xsct and xsdb use tcl
 au BufNewFile,BufRead .xsctcmdhistory,.xsdbcmdhistory	setf tcl
 
-" templ 
+" templ
 au BufNewFile,BufRead *.templ			setf templ
 
 " Teal
diff --git a/runtime/ftplugin/mediawiki.vim b/runtime/ftplugin/mediawiki.vim
new file mode 100644
index 0000000000..efd2ae5c9b
--- /dev/null
+++ b/runtime/ftplugin/mediawiki.vim
@@ -0,0 +1,42 @@
+" Language: MediaWiki
+" Maintainer: Avid Seeker <avidseeker7@protonmail.com>
+" Home: http://en.wikipedia.org/wiki/Wikipedia:Text_editor_support#Vim
+" Last Change: 2024 Jul 14
+" Credits: chikamichi
+"
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let g:did_ftplugin = 1
+
+" Many MediaWiki wikis prefer line breaks only at the end of paragraphs
+" (like in a text processor), which results in long, wrapping lines.
+setlocal wrap linebreak
+setlocal textwidth=0
+
+setlocal formatoptions-=tc formatoptions+=l formatoptions+=roq
+setlocal matchpairs+=<:>
+
+" Treat lists, indented text and tables as comment lines and continue with the
+" same formatting in the next line (i.e. insert the comment leader) when hitting
+" <CR> or using "o".
+setlocal comments=n:#,n:*,n:\:,s:{\|,m:\|,ex:\|},s:<!--,m:\ \ \ \ ,e:-->
+setlocal commentstring=<!--\ %s\ -->
+
+" match HTML tags (taken directly from $VIM/ftplugin/html.vim)
+if exists("loaded_matchit")
+    let b:match_ignorecase=0
+    let b:match_skip = 's:Comment'
+    let b:match_words = '<:>,' .
+    \ '<\@<=[ou]l\>[^>]*\%(>\|$\):<\@<=li\>:<\@<=/[ou]l>,' .
+    \ '<\@<=dl\>[^>]*\%(>\|$\):<\@<=d[td]\>:<\@<=/dl>,' .
+    \ '<\@<=\([^/][^ \t>]*\)[^>]*\%(>\|$\):<\@<=/\1>'
+endif
+
+" Enable folding based on ==sections==
+setlocal foldexpr=getline(v:lnum)=~'^\\(=\\+\\)[^=]\\+\\1\\(\\s*<!--.*-->\\)\\=\\s*$'?\">\".(len(matchstr(getline(v:lnum),'^=\\+'))-1):\"=\"
+setlocal foldmethod=expr
+
+let b:undo_ftplugin = "setl commentstring< comments< formatoptions< foldexpr< foldmethod<"
+let b:undo_ftplugin += " matchpairs< linebreak< wrap< textwidth<"
diff --git a/runtime/syntax/mediawiki.vim b/runtime/syntax/mediawiki.vim
new file mode 100644
index 0000000000..8ac30b93db
--- /dev/null
+++ b/runtime/syntax/mediawiki.vim
@@ -0,0 +1,292 @@
+" mediawiki.vim (formerly named Wikipedia.vim)
+"
+" Vim syntax file
+" Language: MediaWiki
+" Maintainer: Avid Seeker <avidseeker7@protonmail.com>
+" Home: http://en.wikipedia.org/wiki/Wikipedia:Text_editor_support#Vim
+" Last Change: 2024 Jul 14
+" Credits: [[User:Unforgettableid]] [[User:Aepd87]], [[User:Danny373]], [[User:Ingo Karkat]], et al.
+"
+" Published on Wikipedia in 2003-04 and declared authorless.
+"
+" Based on the HTML syntax file. Probably too closely based, in fact.
+" There may well be name collisions everywhere, but ignorance is bliss,
+" so they say.
+"
+
+if exists("b:current_syntax")
+  finish
+endif
+
+syntax case ignore
+syntax spell toplevel
+
+" Mark illegal characters
+sy match htmlError "[<>&]"
+
+" Tags
+sy region  htmlString   contained start=+"+                        end=+"+ contains=htmlSpecialChar,@htmlPreproc
+sy region  htmlString   contained start=+'+                        end=+'+ contains=htmlSpecialChar,@htmlPreproc
+sy match   htmlValue    contained "=[\t ]*[^'" \t>][^ \t>]*"hs=s+1         contains=@htmlPreproc
+sy region  htmlEndTag             start=+</+                       end=+>+ contains=htmlTagN,htmlTagError
+sy region  htmlTag                start=+<[^/]+                    end=+>+ contains=htmlTagN,htmlString,htmlArg,htmlValue,htmlTagError,htmlEvent,htmlCssDefinition,@htmlPreproc,@htmlArgCluster
+sy match   htmlTagN     contained +<\s*[-a-zA-Z0-9]\++hs=s+1               contains=htmlTagName,htmlSpecialTagName,@htmlTagNameCluster
+sy match   htmlTagN     contained +</\s*[-a-zA-Z0-9]\++hs=s+2              contains=htmlTagName,htmlSpecialTagName,@htmlTagNameCluster
+sy match   htmlTagError contained "[^>]<"ms=s+1
+
+" Allowed HTML tag names
+sy keyword htmlTagName contained big blockquote br caption center cite code
+sy keyword htmlTagName contained dd del div dl dt font hr ins li
+sy keyword htmlTagName contained ol p pre rb rp rt ruby s small span strike sub
+sy keyword htmlTagName contained sup table td th tr tt ul var
+sy match   htmlTagName contained "\<\(b\|i\|u\|h[1-6]\|em\|strong\)\>"
+" Allowed Wiki tag names
+sy keyword htmlTagName contained math nowiki references source syntaxhighlight
+
+" Allowed arg names
+sy keyword htmlArg contained align lang dir width height nowrap bgcolor clear
+sy keyword htmlArg contained noshade cite datetime size face color type start
+sy keyword htmlArg contained value compact summary border frame rules
+sy keyword htmlArg contained cellspacing cellpadding valign char charoff
+sy keyword htmlArg contained colgroup col span abbr axis headers scope rowspan
+sy keyword htmlArg contained colspan id class name style title
+
+" Special characters
+sy match htmlSpecialChar "&#\=[0-9A-Za-z]\{1,8};"
+
+" Comments
+sy region htmlComment                start=+<!+                end=+>+     contains=htmlCommentPart,htmlCommentError
+sy match  htmlCommentError contained "[^><!]"
+sy region htmlCommentPart  contained start=+--+                end=+--\s*+ contains=@htmlPreProc
+sy region htmlComment                start=+<!DOCTYPE+ keepend end=+>+
+
+if !exists("html_no_rendering")
+  sy cluster htmlTop contains=@Spell,htmlTag,htmlEndTag,htmlSpecialChar,htmlPreProc,htmlComment,htmlLink,@htmlPreproc
+
+  sy region htmlBold                          start="<b\>"      end="</b>"me=e-4      contains=@htmlTop,htmlBoldUnderline,htmlBoldItalic
+  sy region htmlBold                          start="<strong\>" end="</strong>"me=e-9 contains=@htmlTop,htmlBoldUnderline,htmlBoldItalic
+  sy region htmlBoldUnderline       contained start="<u\>"      end="</u>"me=e-4      contains=@htmlTop,htmlBoldUnderlineItalic
+  sy region htmlBoldItalic          contained start="<i\>"      end="</i>"me=e-4      contains=@htmlTop,htmlBoldItalicUnderline
+  sy region htmlBoldItalic          contained start="<em\>"     end="</em>"me=e-5     contains=@htmlTop,htmlBoldItalicUnderline
+  sy region htmlBoldUnderlineItalic contained start="<i\>"      end="</i>"me=e-4      contains=@htmlTop
+  sy region htmlBoldUnderlineItalic contained start="<em\>"     end="</em>"me=e-5     contains=@htmlTop
+  sy region htmlBoldItalicUnderline contained start="<u\>"      end="</u>"me=e-4      contains=@htmlTop,htmlBoldUnderlineItalic
+
+  sy region htmlUnderline                     start="<u\>"      end="</u>"me=e-4      contains=@htmlTop,htmlUnderlineBold,htmlUnderlineItalic
+  sy region htmlUnderlineBold       contained start="<b\>"      end="</b>"me=e-4      contains=@htmlTop,htmlUnderlineBoldItalic
+  sy region htmlUnderlineBold       contained start="<strong\>" end="</strong>"me=e-9 contains=@htmlTop,htmlUnderlineBoldItalic
+  sy region htmlUnderlineItalic     contained start="<i\>"      end="</i>"me=e-4      contains=@htmlTop,htmlUnderlineItalicBold
+  sy region htmlUnderlineItalic     contained start="<em\>"     end="</em>"me=e-5     contains=@htmlTop,htmlUnderlineItalicBold
+  sy region htmlUnderlineItalicBold contained start="<b\>"      end="</b>"me=e-4      contains=@htmlTop
+  sy region htmlUnderlineItalicBold contained start="<strong\>" end="</strong>"me=e-9 contains=@htmlTop
+  sy region htmlUnderlineBoldItalic contained start="<i\>"      end="</i>"me=e-4      contains=@htmlTop
+  sy region htmlUnderlineBoldItalic contained start="<em\>"     end="</em>"me=e-5     contains=@htmlTop
+
+  sy region htmlItalic                        start="<i\>"      end="</i>"me=e-4      contains=@htmlTop,htmlItalicBold,htmlItalicUnderline
+  sy region htmlItalic                        start="<em\>"     end="</em>"me=e-5     contains=@htmlTop
+  sy region htmlItalicBold          contained start="<b\>"      end="</b>"me=e-4      contains=@htmlTop,htmlItalicBoldUnderline
+  sy region htmlItalicBold          contained start="<strong\>" end="</strong>"me=e-9 contains=@htmlTop,htmlItalicBoldUnderline
+  sy region htmlItalicBoldUnderline contained start="<u\>"      end="</u>"me=e-4      contains=@htmlTop
+  sy region htmlItalicUnderline     contained start="<u\>"      end="</u>"me=e-4      contains=@htmlTop,htmlItalicUnderlineBold
+  sy region htmlItalicUnderlineBold contained start="<b\>"      end="</b>"me=e-4      contains=@htmlTop
+  sy region htmlItalicUnderlineBold contained start="<strong\>" end="</strong>"me=e-9 contains=@htmlTop
+
+  sy region htmlH1    start="<h1\>"    end="</h1>"me=e-5    contains=@htmlTop
+  sy region htmlH2    start="<h2\>"    end="</h2>"me=e-5    contains=@htmlTop
+  sy region htmlH3    start="<h3\>"    end="</h3>"me=e-5    contains=@htmlTop
+  sy region htmlH4    start="<h4\>"    end="</h4>"me=e-5    contains=@htmlTop
+  sy region htmlH5    start="<h5\>"    end="</h5>"me=e-5    contains=@htmlTop
+  sy region htmlH6    start="<h6\>"    end="</h6>"me=e-5    contains=@htmlTop
+endif
+
+
+" No htmlTop and wikiPre inside HTML preformatted areas, because
+" MediaWiki renders everything in there literally (HTML tags and
+" entities, too): <pre> tags work as the combination of <nowiki> and
+" the standard HTML <pre> tag: the content will preformatted, and it
+" will not be parsed, but shown as in the wikitext source.
+"
+" With wikiPre, indented lines would be rendered differently from
+" unindented lines.
+sy match htmlPreTag       /<pre\>[^>]*>/         contains=htmlTag
+sy match htmlPreEndTag    /<\/pre>/       contains=htmlEndTag
+sy match wikiNowikiTag    /<nowiki>/      contains=htmlTag
+sy match wikiNowikiEndTag /<\/nowiki>/    contains=htmlEndTag
+sy match wikiSourceTag    /<source\s\+[^>]\+>/ contains=htmlTag
+sy match wikiSourceEndTag /<\/source>/    contains=htmlEndTag
+sy match wikiSyntaxHLTag    /<syntaxhighlight\s\+[^>]\+>/ contains=htmlTag
+sy match wikiSyntaxHLEndTag /<\/syntaxhighlight>/    contains=htmlEndTag
+
+" Note: Cannot use 'start="<pre>"rs=e', so still have the <pre> tag
+" highlighted correctly via separate sy-match. Unfortunately, this will
+" also highlight <pre> tags inside the preformatted region.
+sy region htmlPre    start="<pre\>[^>]*>"                 end="<\/pre>"me=e-6    contains=htmlPreTag
+sy region wikiNowiki start="<nowiki>"              end="<\/nowiki>"me=e-9 contains=wikiNowikiTag
+sy region wikiSource start="<source\s\+[^>]\+>"         keepend end="<\/source>"me=e-9 contains=wikiSourceTag
+sy region wikiSyntaxHL start="<syntaxhighlight\s\+[^>]\+>" keepend end="<\/syntaxhighlight>"me=e-18 contains=wikiSyntaxHLTag
+
+sy include @TeX syntax/tex.vim
+unlet b:current_syntax
+sy region wikiTeX matchgroup=htmlTag start="<math>" end="<\/math>"  contains=@texMathZoneGroup,wikiNowiki,wikiNowikiEndTag
+sy region wikiRef matchgroup=htmlTag start="<ref>"  end="<\/ref>"   contains=wikiNowiki,wikiNowikiEndTag
+
+sy cluster wikiText contains=wikiLink,wikiTemplate,wikiNowiki,wikiNowikiEndTag,wikiItalic,wikiBold,wikiBoldAndItalic
+
+" Tables
+sy cluster wikiTableFormat contains=wikiTemplate,htmlString,htmlArg,htmlValue
+sy region wikiTable matchgroup=wikiTableSeparator start="{|" end="|}" contains=wikiTableHeaderLine,wikiTableCaptionLine,wikiTableNewRow,wikiTableHeadingCell,wikiTableNormalCell,@wikiText
+sy match  wikiTableSeparator /^!/ contained
+sy match  wikiTableSeparator /^|/ contained
+sy match  wikiTableSeparator /^|[+-]/ contained
+sy match  wikiTableSeparator /||/ contained
+sy match  wikiTableSeparator /!!/ contained
+sy match  wikiTableFormatEnd /[!|]/ contained
+sy match  wikiTableHeadingCell /\(^!\|!!\)\([^!|]*|\)\?.*/ contains=wikiTableSeparator,@wikiText,wikiTableHeadingFormat
+" Require at least one '=' in the format, to avoid spurious matches (e.g.
+" the | in [[foo|bar]] might be taken as the final |, indicating the beginning
+" of the cell). The same is done for wikiTableNormalFormat below.
+sy match  wikiTableHeadingFormat /\%(^!\|!!\)[^!|]\+=[^!|]\+\([!|]\)\(\1\)\@!/me=e-1 contains=@wikiTableFormat,wikiTableSeparator nextgroup=wikiTableFormatEnd
+sy match  wikiTableNormalCell /\(^|\|||\)\([^|]*|\)\?.*/ contains=wikiTableSeparator,@wikiText,wikiTableNormalFormat
+sy match  wikiTableNormalFormat /\(^|\|||\)[^|]\+=[^|]\+||\@!/me=e-1 contains=@wikiTableFormat,wikiTableSeparator nextgroup=wikiTableFormatEnd
+sy match  wikiTableHeaderLine /\(^{|\)\@<=.*$/ contained contains=@wikiTableFormat
+sy match  wikiTableCaptionLine /^|+.*$/ contained contains=wikiTableSeparator,@wikiText
+sy match  wikiTableNewRow /^|-.*$/ contained contains=wikiTableSeparator,@wikiTableFormat
+
+sy cluster wikiTop contains=@Spell,wikiLink,wikiNowiki,wikiNowikiEndTag
+
+sy region wikiItalic        start=+'\@<!'''\@!+ end=+''+    oneline contains=@wikiTop,wikiItalicBold
+sy region wikiBold          start=+'''+         end=+'''+   oneline contains=@wikiTop,wikiBoldItalic
+sy region wikiBoldAndItalic start=+'''''+       end=+'''''+ oneline contains=@wikiTop
+
+sy region wikiBoldItalic contained start=+'\@<!'''\@!+ end=+''+  oneline contains=@wikiTop
+sy region wikiItalicBold contained start=+'''+         end=+'''+ oneline contains=@wikiTop
+
+sy region wikiH1 start="^="      end="="      oneline contains=@wikiTop
+sy region wikiH2 start="^=="     end="=="     oneline contains=@wikiTop
+sy region wikiH3 start="^==="    end="==="    oneline contains=@wikiTop
+sy region wikiH4 start="^===="   end="===="   oneline contains=@wikiTop
+sy region wikiH5 start="^====="  end="====="  oneline contains=@wikiTop
+sy region wikiH6 start="^======" end="======" oneline contains=@wikiTop
+
+sy region wikiLink start="\[\[" end="\]\]\(s\|'s\|es\|ing\|\)" oneline contains=wikiLink,wikiNowiki,wikiNowikiEndTag
+
+sy region wikiLink start="https\?://" end="\W*\_s"me=s-1 oneline
+sy region wikiLink start="\[http:"   end="\]" oneline contains=wikiNowiki,wikiNowikiEndTag
+sy region wikiLink start="\[https:"  end="\]" oneline contains=wikiNowiki,wikiNowikiEndTag
+sy region wikiLink start="\[ftp:"    end="\]" oneline contains=wikiNowiki,wikiNowikiEndTag
+sy region wikiLink start="\[gopher:" end="\]" oneline contains=wikiNowiki,wikiNowikiEndTag
+sy region wikiLink start="\[news:"   end="\]" oneline contains=wikiNowiki,wikiNowikiEndTag
+sy region wikiLink start="\[mailto:" end="\]" oneline contains=wikiNowiki,wikiNowikiEndTag
+
+sy match  wikiTemplateName /{{[^{|}<>\[\]]\+/hs=s+2 contained
+sy region wikiTemplate start="{{" end="}}" keepend extend contains=wikiNowiki,wikiNowikiEndTag,wikiTemplateName,wikiTemplateParam,wikiTemplate,wikiLink
+sy region wikiTemplateParam start="{{{\s*\d" end="}}}" extend contains=wikiTemplateName
+
+sy match wikiParaFormatChar /^[\:|\*|;|#]\+/
+sy match wikiParaFormatChar /^-----*/
+sy match wikiPre            /^\ .*$/         contains=wikiNowiki,wikiNowikiEndTag
+
+" HTML highlighting
+
+hi def link htmlTag            Function
+hi def link htmlEndTag         Identifier
+hi def link htmlArg            Type
+hi def link htmlTagName        htmlStatement
+hi def link htmlSpecialTagName Exception
+hi def link htmlValue          String
+hi def link htmlSpecialChar    Special
+
+if !exists("html_no_rendering")
+  hi def link htmlTitle Title
+  hi def link htmlH1    htmlTitle
+  hi def link htmlH2    htmlTitle
+  hi def link htmlH3    htmlTitle
+  hi def link htmlH4    htmlTitle
+  hi def link htmlH5    htmlTitle
+  hi def link htmlH6    htmlTitle
+
+  hi def link htmlPreProc          PreProc
+  hi def link htmlHead             htmlPreProc
+  hi def link htmlPreProcAttrName  htmlPreProc
+  hi def link htmlPreStmt          htmlPreProc
+
+  hi def link htmlSpecial          Special
+  hi def link htmlCssDefinition    htmlSpecial
+  hi def link htmlEvent            htmlSpecial
+  hi def link htmlSpecialChar      htmlSpecial
+
+  hi def link htmlComment          Comment
+  hi def link htmlCommentPart      htmlComment
+  hi def link htmlCssStyleComment  htmlComment
+
+  hi def link htmlString           String
+  hi def link htmlPreAttr          htmlString
+  hi def link htmlValue            htmlString
+
+  hi def link htmlError            Error
+  hi def link htmlBadArg           htmlError
+  hi def link htmlBadTag           htmlError
+  hi def link htmlCommentError     htmlError
+  hi def link htmlPreError         htmlError
+  hi def link htmlPreProcAttrError htmlError
+  hi def link htmlTagError         htmlError
+
+  hi def link htmlStatement        Statement
+
+  hi def link htmlConstant         Constant
+
+  hi def link htmlBoldItalicUnderline htmlBoldUnderlineItalic
+  hi def link htmlUnderlineItalicBold htmlBoldUnderlineItalic
+  hi def link htmlUnderlineBoldItalic htmlBoldUnderlineItalic
+  hi def link htmlItalicBoldUnderline htmlBoldUnderlineItalic
+  hi def link htmlItalicUnderlineBold htmlBoldUnderlineItalic
+
+  hi def link htmlItalicBold          htmlBoldItalic
+  hi def link htmlItalicUnderline     htmlUnderlineItalic
+  hi def link htmlUnderlineBold       htmlBoldUnderline
+
+  hi def link htmlLink Underlined
+
+  if !exists("html_style_rendering")
+    hi def htmlBold                term=bold                  cterm=bold                  gui=bold
+    hi def htmlBoldUnderline       term=bold,underline        cterm=bold,underline        gui=bold,underline
+    hi def htmlBoldItalic          term=bold,italic           cterm=bold,italic           gui=bold,italic
+    hi def htmlBoldUnderlineItalic term=bold,italic,underline cterm=bold,italic,underline gui=bold,italic,underline
+    hi def htmlUnderline           term=underline             cterm=underline             gui=underline
+    hi def htmlUnderlineItalic     term=italic,underline      cterm=italic,underline      gui=italic,underline
+    hi def htmlItalic              term=italic                cterm=italic                gui=italic
+  endif
+endif
+
+" Wiki highlighting
+
+hi def link wikiItalic        htmlItalic
+hi def link wikiBold          htmlBold
+hi def link wikiBoldItalic    htmlBoldItalic
+hi def link wikiItalicBold    htmlBoldItalic
+hi def link wikiBoldAndItalic htmlBoldItalic
+
+hi def link wikiH1 htmlTitle
+hi def link wikiH2 htmlTitle
+hi def link wikiH3 htmlTitle
+hi def link wikiH4 htmlTitle
+hi def link wikiH5 htmlTitle
+hi def link wikiH6 htmlTitle
+
+hi def link wikiLink           htmlLink
+hi def link wikiTemplate       htmlSpecial
+hi def link wikiTemplateParam  htmlSpecial
+hi def link wikiTemplateName   Type
+hi def link wikiParaFormatChar htmlSpecial
+hi def link wikiPre            htmlConstant
+hi def link wikiRef            htmlComment
+
+hi def link htmlPre            wikiPre
+hi def link wikiSource         wikiPre
+hi def link wikiSyntaxHL       wikiPre
+
+hi def link wikiTableSeparator Statement
+hi def link wikiTableFormatEnd wikiTableSeparator
+hi def link wikiTableHeadingCell htmlBold
+
+let b:current_syntax = "mediawiki"
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index edb984968a..9e66a7c674 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -437,6 +437,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     matlab: ['file.m'],
     maxima: ['file.demo', 'file.dmt', 'file.dm1', 'file.dm2', 'file.dm3',
                 'file.wxm', 'maxima-init.mac'],
+    mediawiki: ['file.mw',  'file.wiki'],
     mel: ['file.mel'],
     mermaid: ['file.mmd', 'file.mmdc', 'file.mermaid'],
     meson: ['meson.build', 'meson.options', 'meson_options.txt'],
diff --git a/src/version.c b/src/version.c
index b9d85a66bc..c6b6248878 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    592,
+/**/
     591,
 /**/
     590,