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path: root/base/vim/syntax/json.vim
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" Reload the definition of g:vim_json_syntax_conceal
" see https://github.com/elzr/vim-json/issues/42
runtime! ftplugin/json.vim

if !exists("main_syntax")
  if version < 600
    syntax clear
  elseif exists("b:current_syntax")
    finish
  endif
  let main_syntax = 'json'
endif

syntax match   jsonNoise           /\%(:\|,\)/

" NOTE that for the concealing to work your conceallevel should be set to 2

" Syntax: Strings
" Separated into a match and region because a region by itself is always greedy
syn match  jsonStringMatch /"\([^"]\|\\\"\)\+"\ze[[:blank:]\r\n]*[,}\]]/ contains=jsonString
if has('conceal') && g:vim_json_syntax_conceal == 1
  syn region  jsonString oneline matchgroup=jsonQuote start=/"/  skip=/\\\\\|\\"/  end=/"/ concealends contains=jsonEscape contained
else
  syn region  jsonString oneline matchgroup=jsonQuote start=/"/  skip=/\\\\\|\\"/  end=/"/ contains=jsonEscape contained
endif

" Syntax: JSON does not allow strings with single quotes, unlike JavaScript.
syn region  jsonStringSQError oneline  start=+'+  skip=+\\\\\|\\"+  end=+'+

" Syntax: JSON Keywords
" Separated into a match and region because a region by itself is always greedy
syn match  jsonKeywordMatch /"\([^"]\|\\\"\)\+"[[:blank:]\r\n]*\:/ contains=jsonKeyword
if has('conceal') && g:vim_json_syntax_conceal == 1
  syn region  jsonKeyword matchgroup=jsonQuote start=/"/  end=/"\ze[[:blank:]\r\n]*\:/ concealends contains=jsonEscape contained
else
  syn region  jsonKeyword matchgroup=jsonQuote start=/"/  end=/"\ze[[:blank:]\r\n]*\:/ contains=jsonEscape contained
endif

" Syntax: Escape sequences
syn match   jsonEscape    "\\["\\/bfnrt]" contained
syn match   jsonEscape    "\\u\x\{4}" contained

" Syntax: Numbers
syn match   jsonNumber    "-\=\<\%(0\|[1-9]\d*\)\%(\.\d\+\)\=\%([eE][-+]\=\d\+\)\=\>\ze[[:blank:]\r\n]*[,}\]]"

" ERROR WARNINGS **********************************************
if (!exists("g:vim_json_warnings") || g:vim_json_warnings==1)
  " Syntax: Strings should always be enclosed with quotes.
  syn match   jsonNoQuotesError  "\<[[:alpha:]][[:alnum:]]*\>"
  syn match   jsonTripleQuotesError  /"""/

  " Syntax: An integer part of 0 followed by other digits is not allowed.
  syn match   jsonNumError  "-\=\<0\d\.\d*\>"

  " Syntax: Decimals smaller than one should begin with 0 (so .1 should be 0.1).
  syn match   jsonNumError  "\:\@<=[[:blank:]\r\n]*\zs\.\d\+"

  " Syntax: No comments in JSON, see http://stackoverflow.com/questions/244777/can-i-comment-a-json-file
  syn match   jsonCommentError  "//.*"
  syn match   jsonCommentError  "\(/\*\)\|\(\*/\)"

  " Syntax: No semicolons in JSON
  syn match   jsonSemicolonError  ";"

  " Syntax: No trailing comma after the last element of arrays or objects
  syn match   jsonTrailingCommaError  ",\_s*[}\]]"

  " Syntax: Watch out for missing commas between elements
  syn match   jsonMissingCommaError /\("\|\]\|\d\)\zs\_s\+\ze"/
  syn match   jsonMissingCommaError /\(\]\|\}\)\_s\+\ze"/ "arrays/objects as values
  syn match   jsonMissingCommaError /}\_s\+\ze{/ "objects as elements in an array
  syn match   jsonMissingCommaError /\(true\|false\)\_s\+\ze"/ "true/false as value
endif

" ********************************************** END OF ERROR WARNINGS
" Allowances for JSONP: function call at the beginning of the file,
" parenthesis and semicolon at the end.
" Function name validation based on
" http://stackoverflow.com/questions/2008279/validate-a-javascript-function-name/2008444#2008444
syn match  jsonPadding "\%^[[:blank:]\r\n]*[_$[:alpha:]][_$[:alnum:]]*[[:blank:]\r\n]*("
syn match  jsonPadding ");[[:blank:]\r\n]*\%$"

" Syntax: Boolean
syn match  jsonBoolean /\(true\|false\)\(\_s\+\ze"\)\@!/

" Syntax: Null
syn keyword  jsonNull      null

" Syntax: Braces
syn region  jsonFold matchgroup=jsonBraces start="{" end=/}\(\_s\+\ze\("\|{\)\)\@!/ transparent fold
syn region  jsonFold matchgroup=jsonBraces start="\[" end=/]\(\_s\+\ze"\)\@!/ transparent fold

" Define the default highlighting.
if version >= 508 || !exists("did_json_syn_inits")
  hi def link jsonPadding  Operator
  hi def link jsonString   String
  hi def link jsonTest     Label
  hi def link jsonEscape   Special
  hi def link jsonNumber   Delimiter
  hi def link jsonBraces   Delimiter
  hi def link jsonNull     Function
  hi def link jsonBoolean  Delimiter
  hi def link jsonKeyword  Label

  if (!exists("g:vim_json_warnings") || g:vim_json_warnings==1)
    hi def link jsonNumError           Error
    hi def link jsonCommentError       Error
    hi def link jsonSemicolonError     Error
    hi def link jsonTrailingCommaError Error
    hi def link jsonMissingCommaError  Error
    hi def link jsonStringSQError      Error
    hi def link jsonNoQuotesError      Error
    hi def link jsonTripleQuotesError  Error
  endif
  hi def link jsonQuote   Quote
  hi def link jsonNoise   Noise
endif

let b:current_syntax = "json"
if main_syntax == 'json'
  unlet main_syntax
endif

" Vim settings
" vim: ts=8 fdm=marker

" MIT License
" Copyright (c) 2013, Jeroen Ruigrok van der Werven, Eli Parra
"Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the Software), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
"The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
"THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"See https://twitter.com/elzr/status/294964017926119424