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mail.vim
" Vim syntax file " Language: Mail file " Previous Maintainer: Felix von Leitner <leitner@math.fu-berlin.de> " Maintainer: GI <a@b.c>, where a='gi1242+vim', b='gmail', c='com' " Last Change: Wed 14 Aug 2013 08:24:52 AM PDT " Quit when a syntax file was already loaded if exists("b:current_syntax") finish endif let s:cpo_save = &cpo set cpo&vim " The mail header is recognized starting with a "keyword:" line and ending " with an empty line or other line that can't be in the header. All lines of " the header are highlighted. Headers of quoted messages (quoted with >) are " also highlighted. " Syntax clusters syn cluster mailHeaderFields contains=mailHeaderKey,mailSubject,mailHeaderEmail,@mailLinks syn cluster mailLinks contains=mailURL,mailEmail syn cluster mailQuoteExps contains=mailQuoteExp1,mailQuoteExp2,mailQuoteExp3,mailQuoteExp4,mailQuoteExp5,mailQuoteExp6 syn case match " For "From " matching case is required. The "From " is not matched in quoted " emails " According to RFC 2822 any printable ASCII character can appear in a field " name, except ':'. syn region mailHeader contains=@mailHeaderFields,@NoSpell start="^From .*\d\d\d\d$" skip="^\s" end="\v^[!-9;-~]*([^!-~]|$)"me=s-1 fold syn match mailHeaderKey contained contains=mailEmail,@NoSpell "^From\s.*\d\d\d\d$" " Nothing else depends on case. syn case ignore " Headers in properly quoted (with "> " or ">") emails are matched 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;-~]*([^!-~]|$)"me=s-1 end="\v^\z1@!"me=s-1 end="\v^\z1(\> ?)+"me=s-1 fold " Usenet headers syn match mailHeaderKey contained contains=mailHeaderEmail,mailEmail,@NoSpell "\v(^(\> ?)*)@<=(Newsgroups|Followup-To|Message-ID|Supersedes|Control):.*$" syn region mailHeaderKey contained contains=mailHeaderEmail,mailEmail,@mailQuoteExps,@NoSpell start="\v(^(\> ?)*)@<=(to|b?cc):" skip=",$" end="$" syn match mailHeaderKey contained contains=mailHeaderEmail,mailEmail,@NoSpell "\v(^(\> ?)*)@<=(from|reply-to):.*$" fold syn match mailHeaderKey contained contains=@NoSpell "\v(^(\> ?)*)@<=date:" syn match mailSubject contained "\v^subject:.*$" fold syn match mailSubject contained contains=@NoSpell "\v(^(\> ?)+)@<=subject:.*$" " Anything in the header between < and > is an email address syn match mailHeaderEmail contained contains=@NoSpell "<.\{-}>" " Mail Signatures. (Begin with "-- ", end with change in quote level) syn region mailSignature keepend contains=@mailLinks,@mailQuoteExps start="^--\s$" end="^$" end="^\(> \?\)\+"me=s-1 fold syn region mailSignature keepend contains=@mailLinks,@mailQuoteExps,@NoSpell start="^\z(\(> \?\)\+\)--\s$" end="^\z1$" end="^\z1\@!"me=s-1 end="^\z1\(> \?\)\+"me=s-1 fold " Treat verbatim Text special. syn region mailVerbatim contains=@NoSpell keepend start="^#v+$" end="^#v-$" fold syn region mailVerbatim contains=@mailQuoteExps,@NoSpell keepend start="^\z(\(> \?\)\+\)#v+$" end="\z1#v-$" fold " URLs start with a known protocol or www,web,w3. syn match mailURL contains=@NoSpell `\v<(((https?|ftp|gopher)://|(mailto|file|news):)[^' <>"]+|(www|web|w3)[a-z0-9_-]*\.[a-z0-9._-]+\.[^' <>"]+)[a-z0-9/]` syn match mailEmail contains=@NoSpell "\v[_=a-z\./+0-9-]+\@[a-z0-9._-]+\a{2}" " Make sure quote markers in regions (header / signature) have correct color syn match mailQuoteExp1 contained "\v^(\> ?)" syn match mailQuoteExp2 contained "\v^(\> ?){2}" syn match mailQuoteExp3 contained "\v^(\> ?){3}" syn match mailQuoteExp4 contained "\v^(\> ?){4}" syn match mailQuoteExp5 contained "\v^(\> ?){5}" syn match mailQuoteExp6 contained "\v^(\> ?){6}" " Even and odd quoted lines. Order is important here! syn region mailQuoted6 keepend contains=mailVerbatim,mailHeader,@mailLinks,mailSignature,@NoSpell start="^\z(\(\([a-z]\+>\|[]|}>]\)[ \t]*\)\{5}\([a-z]\+>\|[]|}>]\)\)" end="^\z1\@!" fold syn region mailQuoted5 keepend contains=mailQuoted6,mailVerbatim,mailHeader,@mailLinks,mailSignature,@NoSpell start="^\z(\(\([a-z]\+>\|[]|}>]\)[ \t]*\)\{4}\([a-z]\+>\|[]|}>]\)\)" end="^\z1\@!" fold syn region mailQuoted4 keepend contains=mailQuoted5,mailQuoted6,mailVerbatim,mailHeader,@mailLinks,mailSignature,@NoSpell start="^\z(\(\([a-z]\+>\|[]|}>]\)[ \t]*\)\{3}\([a-z]\+>\|[]|}>]\)\)" end="^\z1\@!" fold syn region mailQuoted3 keepend contains=mailQuoted4,mailQuoted5,mailQuoted6,mailVerbatim,mailHeader,@mailLinks,mailSignature,@NoSpell start="^\z(\(\([a-z]\+>\|[]|}>]\)[ \t]*\)\{2}\([a-z]\+>\|[]|}>]\)\)" end="^\z1\@!" fold 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 syn region mailQuoted1 keepend contains=mailQuoted2,mailQuoted3,mailQuoted4,mailQuoted5,mailQuoted6,mailVerbatim,mailHeader,@mailLinks,mailSignature,@NoSpell start="^\z([a-z]\+>\|[]|}>]\)" end="^\z1\@!" fold " Need to sync on the header. Assume we can do that within 100 lines if exists("mail_minlines") exec "syn sync minlines=" . mail_minlines else syn sync minlines=100 endif " Define the default highlighting. hi def link mailVerbatim Special hi def link mailHeader Statement hi def link mailHeaderKey Type hi def link mailSignature PreProc hi def link mailHeaderEmail mailEmail hi def link mailEmail Special hi def link mailURL String hi def link mailSubject Title hi def link mailQuoted1 Comment hi def link mailQuoted3 mailQuoted1 hi def link mailQuoted5 mailQuoted1 hi def link mailQuoted2 Identifier hi def link mailQuoted4 mailQuoted2 hi def link mailQuoted6 mailQuoted2 hi def link mailQuoteExp1 mailQuoted1 hi def link mailQuoteExp2 mailQuoted2 hi def link mailQuoteExp3 mailQuoted3 hi def link mailQuoteExp4 mailQuoted4 hi def link mailQuoteExp5 mailQuoted5 hi def link mailQuoteExp6 mailQuoted6 let b:current_syntax = "mail" let &cpo = s:cpo_save unlet s:cpo_save
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