046a0f75d0
switch to the DFA engine for the emoji collaction range Co-authored-by: GI <gi1242+vim@gmail.com> Signed-off-by: GI <gi1242@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
118 lines
6.0 KiB
VimL
118 lines
6.0 KiB
VimL
" Vim syntax file
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" Language: Mail file
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" Previous Maintainer: Felix von Leitner <leitner@math.fu-berlin.de>
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" Maintainer: GI <a@b.c>, where a='gi1242+vim', b='gmail', c='com'
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" Last Change: Thu 25 Jan 2024 10:34:02 AM EST
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" Quit when a syntax file was already loaded
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if exists("b:current_syntax")
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finish
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endif
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let s:cpo_save = &cpo
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set cpo&vim
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syn spell toplevel
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" The mail header is recognized starting with a "keyword:" line and ending
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" with an empty line or other line that can't be in the header. All lines of
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" the header are highlighted. Headers of quoted messages (quoted with >) are
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" also highlighted.
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" Syntax clusters
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syn cluster mailHeaderFields contains=mailHeaderKey,mailSubject,mailHeaderEmail,@mailLinks
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syn cluster mailLinks contains=mailURL,mailEmail
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syn cluster mailQuoteExps contains=mailQuoteExp1,mailQuoteExp2,mailQuoteExp3,mailQuoteExp4,mailQuoteExp5,mailQuoteExp6
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syn case match
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" For "From " matching case is required. The "From " is not matched in quoted
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" emails
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" According to RFC 2822 any printable ASCII character can appear in a field
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" name, except ':'.
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syn region mailHeader contains=@mailHeaderFields,@NoSpell start="^From .*\d\d\d\d$" skip="^\s" end="\v^[!-9;-~]*([^!-~]|$)"me=s-1 fold
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syn match mailHeaderKey contained contains=mailEmail,@NoSpell "^From\s.*\d\d\d\d$"
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" Nothing else depends on case.
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syn case ignore
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" Headers in properly quoted (with "> " or ">") emails are matched
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syn region mailHeader keepend contains=@mailHeaderFields,@mailQuoteExps,@NoSpell start="^\z(\(> \?\)*\)\v(newsgroups|x-([a-z\-])*|path|xref|message-id|from|((in-)?reply-)?to|b?cc|subject|return-path|received|date|replied):" skip="^\z1\s" end="\v^\z1[!-9;-~]*([^!-~]|$)"me=s-1 end="\v^\z1@!"me=s-1 end="\v^\z1(\> ?)+"me=s-1 fold
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" Usenet headers
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syn match mailHeaderKey contained contains=mailHeaderEmail,mailEmail,@NoSpell "\v(^(\> ?)*)@<=(Newsgroups|Followup-To|Message-ID|Supersedes|Control):.*$"
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syn region mailHeaderKey contained contains=mailHeaderEmail,mailEmail,@mailQuoteExps,@NoSpell start="\v(^(\> ?)*)@<=(to|b?cc):" skip=",$" end="$"
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syn match mailHeaderKey contained contains=mailHeaderEmail,mailEmail,@NoSpell "\v(^(\> ?)*)@<=(from|reply-to):.*$" fold
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syn match mailHeaderKey contained contains=@NoSpell "\v(^(\> ?)*)@<=date:"
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syn match mailSubject contained "\v^subject:.*$" fold
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syn match mailSubject contained contains=@NoSpell "\v(^(\> ?)+)@<=subject:.*$"
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" Anything in the header between < and > is an email address
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syn match mailHeaderEmail contained contains=@NoSpell "<.\{-}>"
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" Mail Signatures. (Begin with "-- ", end with change in quote level)
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syn region mailSignature keepend contains=@mailLinks,@mailQuoteExps start="^--\s$" end="^$" end="^\(> \?\)\+"me=s-1 fold
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syn region mailSignature keepend contains=@mailLinks,@mailQuoteExps,@NoSpell start="^\z(\(> \?\)\+\)--\s$" end="^\z1$" end="^\z1\@!"me=s-1 end="^\z1\(> \?\)\+"me=s-1 fold
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" Treat verbatim Text special.
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syn region mailVerbatim contains=@NoSpell keepend start="^#v+$" end="^#v-$" fold
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syn region mailVerbatim contains=@mailQuoteExps,@NoSpell keepend start="^\z(\(> \?\)\+\)#v+$" end="\z1#v-$" fold
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" URLs start with a known protocol or www,web,w3.
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syn match mailURL contains=@NoSpell `\v<(((https?|ftp|gopher)://|(mailto|file|news):)[^' <>"]+|(www|web|w3)[a-z0-9_-]*\.[a-z0-9._-]+\.[^' <>"]+)[a-z0-9/]`
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syn match mailEmail contains=@NoSpell "\v[_=a-z\./+0-9-]+\@[a-z0-9._-]+\a{2}"
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" Don't spell emojis
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syn match mailEmoji contains=@NoSpell "\%#=2\v[\U1f300-\U1f64f\U1f900-\U1f9ff]"
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" Make sure quote markers in regions (header / signature) have correct color
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syn match mailQuoteExp1 contained "\v^(\> ?)"
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syn match mailQuoteExp2 contained "\v^(\> ?){2}"
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syn match mailQuoteExp3 contained "\v^(\> ?){3}"
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syn match mailQuoteExp4 contained "\v^(\> ?){4}"
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syn match mailQuoteExp5 contained "\v^(\> ?){5}"
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syn match mailQuoteExp6 contained "\v^(\> ?){6}"
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" Even and odd quoted lines. Order is important here!
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syn region mailQuoted6 keepend contains=mailVerbatim,mailHeader,@mailLinks,mailSignature,@NoSpell start="^\z(\(\([a-z]\+>\|[]|}>]\)[ \t]*\)\{5}\([a-z]\+>\|[]|}>]\)\)" end="^\z1\@!" fold
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syn region mailQuoted5 keepend contains=mailQuoted6,mailVerbatim,mailHeader,@mailLinks,mailSignature,@NoSpell start="^\z(\(\([a-z]\+>\|[]|}>]\)[ \t]*\)\{4}\([a-z]\+>\|[]|}>]\)\)" end="^\z1\@!" fold
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syn region mailQuoted4 keepend contains=mailQuoted5,mailQuoted6,mailVerbatim,mailHeader,@mailLinks,mailSignature,@NoSpell start="^\z(\(\([a-z]\+>\|[]|}>]\)[ \t]*\)\{3}\([a-z]\+>\|[]|}>]\)\)" end="^\z1\@!" fold
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syn region mailQuoted3 keepend contains=mailQuoted4,mailQuoted5,mailQuoted6,mailVerbatim,mailHeader,@mailLinks,mailSignature,@NoSpell start="^\z(\(\([a-z]\+>\|[]|}>]\)[ \t]*\)\{2}\([a-z]\+>\|[]|}>]\)\)" end="^\z1\@!" fold
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syn region mailQuoted2 keepend contains=mailQuoted3,mailQuoted4,mailQuoted5,mailQuoted6,mailVerbatim,mailHeader,@mailLinks,mailSignature,@NoSpell start="^\z(\(\([a-z]\+>\|[]|}>]\)[ \t]*\)\{1}\([a-z]\+>\|[]|}>]\)\)" end="^\z1\@!" fold
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syn region mailQuoted1 keepend contains=mailQuoted2,mailQuoted3,mailQuoted4,mailQuoted5,mailQuoted6,mailVerbatim,mailHeader,@mailLinks,mailSignature,@NoSpell start="^\z([a-z]\+>\|[]|}>]\)" end="^\z1\@!" fold
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" Need to sync on the header. Assume we can do that within 100 lines
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if exists("mail_minlines")
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exec "syn sync minlines=" . mail_minlines
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else
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syn sync minlines=100
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endif
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" Define the default highlighting.
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hi def link mailVerbatim Special
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hi def link mailHeader PreProc
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hi def link mailHeaderKey Type
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hi def link mailSignature Comment
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hi def link mailHeaderEmail mailEmail
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hi def link mailEmail String
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hi def link mailURL Constant
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hi def link mailSubject Statement
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hi def link mailQuoted1 Function
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hi def link mailQuoted3 mailQuoted1
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hi def link mailQuoted5 mailQuoted1
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hi def link mailQuoted2 Identifier
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hi def link mailQuoted4 mailQuoted2
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hi def link mailQuoted6 mailQuoted2
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hi def link mailQuoteExp1 mailQuoted1
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hi def link mailQuoteExp2 mailQuoted2
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hi def link mailQuoteExp3 mailQuoted3
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hi def link mailQuoteExp4 mailQuoted4
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hi def link mailQuoteExp5 mailQuoted5
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hi def link mailQuoteExp6 mailQuoted6
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let b:current_syntax = "mail"
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let &cpo = s:cpo_save
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unlet s:cpo_save
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