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vim/runtime/syntax/context.vim
Lifepillar 0bca4a0018 runtime(context): update ConTeXt keywords and other minor fixes (#13778) 
Update to the ConTeXt runtime files. Changes:

1. shared syntax files updated with `mtxrun --script interface --vim`
   using the latest ConTeXt LMTX.

2. fixed reference to `make` tag in the help file.

3. added `keepend` to mitigate issues with embedded Lua syntax (see
   below).

4. the latest revision date of each ConTeXt runtime file has been
   updated to the date of this commit.

The issue about embedded Lua was reported by a user:

>Take the following valid ConTeXt file:

>   \starttext
>   \ctxlua{context("Text generated from Lua.")}
>   \ctxlua{context("Another text generated from Lua.")}
>   \stoptext

>On my Vim installation (including when I start Vim with `--clean`), the
>closing bracket and curly braces on line 2 are highlighted red and the
>syntax highlighting after that is off.

>I was trying to dig a little bit into what was going on, using the
>`synID()` and `synIDattr()` functions. It appears that the closing
>bracket on line 2 is matched as a `luaParentError` instead of the end
>of the `luaParen` region. Therefore, the `luaParen` region continues
>all the way to the end of the file. The closing curly brace on line
>2 is matched as a `luaError`, the 2nd `\ctxlua` on line 3 as
>`luaParen`, etc.

>This issue doesn't occur in a plain Lua file, where the closing bracket
>is correctly matched as the end of the `luaParen` region. So it seems
>that something goes wrong when the Lua syntax file is included in the
>ConTeXt one.

By adding `keepend`, the right parenthesis for some reason is still
highlighted as a `luaParenError`, but at least the right curly brace
should correctly end the Lua block.

From what I've seen, I think it is very difficult to embed Lua syntax
properly without help from the Lua syntax file (that is, without
patching it). It has global rules such as:

   syn match  luaParenError ")"
   syn match  luaError "}"

which make it difficult, if not impossible, to contain Lua syntax
without `keepend` (and its limitations).


Signed-off-by: Lifepillar <lifepillar@lifepillar.me>
Signed-off-by: Christian Brabandt <cb@256bit.org>
2023-12-27 18:49:50 +01:00

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vim9script
# Vim syntax file
# Language: ConTeXt typesetting engine
# Maintainer: Nicola Vitacolonna <nvitacolonna@gmail.com>
# Former Maintainers: Nikolai Weibull <now@bitwi.se>
# Latest Revision: 2023 Dec 26
if exists("b:current_syntax")
finish
endif
# Dictionary of (filetype, group) pairs to highlight between \startGROUP \stopGROUP.
var context_include = get(b:, 'context_include', get(g:, 'context_include', {'xml': 'XML'}))
# Deprecation warning
if type(context_include) ==# type([])
echomsg "[ConTeXt] b:context_include/g:context_include must be Dictionaries."
context_include = {'xml': 'XML'}
endif
syn iskeyword @,48-57,_,!,?,a-z,A-Z,192-255
syn spell toplevel
runtime! syntax/shared/context-data-context.vim
runtime! syntax/shared/context-data-interfaces.vim
runtime! syntax/shared/context-data-tex.vim
syn match contextCommand '\\\k\+\>' display contains=@NoSpell
# ConTeXt options, i.e., [...] blocks
syn region contextOptions matchgroup=contextDelimiter start='\[' end=']\|\ze\\stop' skip='\\\[\|\\\]' contains=TOP,@Spell
# Highlight braces
syn match contextDelimiter '[{}]'
# Comments
syn match contextComment '\%(\_^\|[^\\]\)\%(\\\\\)*\zs%.*$' display contains=contextTodo,contextMagicLine
syn match contextComment '^\s*%[CDM].*$' display contains=contextTodo,contextMagicLine
syn keyword contextTodo TODO FIXME XXX NOTE contained
syn match contextMagicLine '^\s*%\s*!TEX.*$' contained
syn match contextBlockDelim '\\\%(start\|stop\)\k\+' contains=@NoSpell
syn region contextEscaped matchgroup=contextPreProc start='\\type\%(\s*\|\n\)*\z([^A-Za-z%]\)' end='\z1'
syn region contextEscaped matchgroup=contextPreProc start='\\type\=\%(\s\|\n\)*{' end='}'
syn region contextEscaped matchgroup=contextPreProc start='\\type\=\%(\s*\|\n\)*<<' end='>>'
syn region contextEscaped matchgroup=contextPreProc
\ start='\\start\z(\a*\%(typing\|typen\)\)'
\ end='\\stop\z1' contains=contextComment keepend
syn region contextEscaped matchgroup=contextPreProc start='\\\h\+Type\%(\s\|\n\)*{' end='}'
syn region contextEscaped matchgroup=contextPreProc start='\\Typed\h\+\%(\s\|\n\)*{' end='}'
syn match contextBuiltin '\\unexpanded\>' display contains=@NoSpell
# \unprotect... \protect regions
syn region contextUnprotect matchgroup=contextBuiltin start='\\unprotect' end='\\protect' contains=TOP
syn match contextSequence '\\[a-zA-Z]*[@_!?]\+[a-zA-Z@_!?]*' contains=@NoSpell contained containedin=contextUnprotect
# Math
syn match contextMathCmd '\\m\%(ath\%(ematics\)\=\)\=\>'
syn region contextInlineMath matchgroup=contextMathDelim start='\$' skip='\\\\\|\\\$' end='\$'
syn region contextDisplayMath matchgroup=contextMathDelim start='\$\$' skip='\\\\\|\\\$' end='\$\$' keepend
syn region contextDisplayMath matchgroup=contextBlockDelim start='\\startformula' end='\\stopformula' contains=TOP
# MetaFun
b:mp_metafun = 1
syn include @mpTop syntax/mp.vim
unlet b:current_syntax
syn region contextMPGraphic matchgroup=contextBlockDelim
\ start='\\start\z(MP\%(clip\|code\|definitions\|drawing\|environment\|extensions\|inclusions\|initializations\|page\|\)\)\>.*$'
\ end='\\stop\z1'
\ contains=@mpTop,@NoSpell
syn region contextMPGraphic matchgroup=contextBlockDelim
\ start='\\start\z(\%(\%[re]usable\|use\|unique\|static\)MPgraphic\|staticMPfigure\|uniqueMPpagegraphic\)\>.*$'
\ end='\\stop\z1'
\ contains=@mpTop,@NoSpell
# Lua
syn include @luaTop syntax/lua.vim
unlet b:current_syntax
syn region contextLuaCode matchgroup=contextBlockDelim
\ start='\\startluacode\>'
\ end='\\stopluacode\>' keepend
\ contains=@luaTop,@NoSpell
syn match contextDirectLua "\\\%(directlua\|ctxlua\)\>\%(\s*%.*$\)\="
\ nextgroup=contextBeginEndLua skipwhite skipempty
\ contains=contextComment
syn region contextBeginEndLua matchgroup=contextSpecial
\ start="{" end="}" skip="\\[{}]" keepend
\ contained contains=@luaTop,@NoSpell
for synname in keys(context_include)
execute 'syn include @' .. synname .. 'Top' 'syntax/' .. synname .. '.vim'
unlet b:current_syntax
execute 'syn region context' .. context_include[synname] .. 'Code'
\ 'matchgroup=contextBlockDelim'
\ 'start=+\\start' .. context_include[synname] .. '\w*+'
\ 'end=+\\stop' .. context_include[synname] .. '\w*+'
\ 'contains=@' .. synname .. 'Top,@NoSpell'
endfor
syn match contextSectioning '\\\%(start\|stop\)\=\%(\%(sub\)*section\|\%(sub\)*subject\|chapter\|part\|component\|product\|title\)\>' contains=@NoSpell
syn match contextSpecial '\\par\>\|-\{2,3}\||[<>/]\=|' contains=@NoSpell
syn match contextSpecial /\\[`'"]/
syn match contextSpecial +\\char\%(\d\{1,3}\|'\o\{1,3}\|"\x\{1,2}\)\>+ contains=@NoSpell
syn match contextSpecial '\^\^.'
syn match contextSpecial '`\%(\\.\|\^\^.\|.\)'
syn match contextStyle '\\\%(em\|ss\|hw\|cg\|mf\)\>' contains=@NoSpell
syn match contextFont '\\\%(CAP\|Cap\|cap\|Caps\|kap\|nocap\)\>' contains=@NoSpell
syn match contextFont '\\\%(Word\|WORD\|Words\|WORDS\)\>' contains=@NoSpell
syn match contextFont '\\\%(vi\{1,3}\|ix\|xi\{0,2}\)\>' contains=@NoSpell
syn match contextFont '\\\%(tf\|b[si]\|s[cl]\|os\)\%(xx\|[xabcd]\)\=\>' contains=@NoSpell
hi def link contextBlockDelim Keyword
hi def link contextBuiltin Keyword
hi def link contextCommand Keyword
hi def link contextComment Comment
hi def link contextDelimiter Delimiter
hi def link contextDirectLua Keyword
hi def link contextEscaped String
hi def link contextFont contextType
hi def link contextKeyword Keyword
hi def link contextInlineMath String
hi def link contextMagicLine PreProc
hi def link contextMathCmd Identifier
hi def link contextMathDelim Delimiter
hi def link contextOptions Typedef
hi def link contextPreProc PreProc
hi def link contextSectioning PreProc
hi def link contextSequence Identifier
hi def link contextSpecial Special
hi def link contextStyle contextType
hi def link contextTodo Todo
hi def link contextType Type
b:current_syntax = 'context'
# vim: sw=2 fdm=marker
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