NestedText.sublime-syntax

%YAML 1.2
---
# https://www.sublimetext.com/docs/3/syntax.html
name: NestedText
scope: source.nestedtext
version: 0.2

file_extensions:
  - nt

variables:
  ws: '[ \t]*'       # Ref does not allow tabs. I do
  wsnl: '([ \t\n])*'
  c_indicator: '[-?:,\[\]{}#&*!|>''"%@`]'

  # Used to detect the possible start of a key.
  peek_key_start: '(?=[A-Za-z0-9_''"-])'
  dot_peek_key: '{{ws}}(\.){{ws}}{{peek_key_start}}'

  string_tag:     '(> )|(>$)'
  key_tag:        '(: )|(:$)'
  list_tag:       '(- )|(-$)'
  dictionary_tag: '[^\n\-\>\:\[\{].*:(?=.+$)'

  # integer = [ "-" / "+" ] int
  # int = DIGIT / digit1-9 1*( DIGIT / "_" DIGIT )
  integer: '([\+\-]?) (?: [0-9] | [1-9] (?: [0-9] | _ [0-9] )+ )'

  HEXDIG: '[0-9A-Fa-f]'
  hex_int: '0x{{HEXDIG}}(?:{{HEXDIG}}|_{{HEXDIG}})*'
  oct_int: '0o[0-7](?:[0-7]|_[0-7])*'
  bin_int: '0b[0-1](?:[0-1]|_[0-1])*'

  bool: |-
    (?x:
       y|Y|yes|Yes|YES|n|N|no|No|NO
      |true|True|TRUE|false|False|FALSE
      |on|On|ON|off|Off|OFF
    )

contexts:
  main:
    - include: line-types
    # - include: illegal

  illegal:
    - match: (.*) ## Invalid things -> everything unmatched
      captures:
        1: invalid.illegal.nestedtext

  line-types:
    - include: key-types        # :␣   '(: )|(:$)'
    - include: dictionary-types # :␣   '^[^\#\n\-\>\:\[\{].*(:)'  /(?=.+$)
    - include: list-types       # -␣   '(- )|(-$)'
    # - include: inline-types
    - include: string-types     # (-␣) OR (:␣), (>␣) OR (>↵),
    - include: comments


################################################################################

  # key-types:

################################################################################

  dictionary-types:
    - include: dictionary-item           # :␣
    - include: dictionary-multiline-item # :␣

  dictionary-item:
    - meta_scope: meta.tag.key.nestedtext
    - match: '^[^\#\n\-\>\:\[\{](.*)(:)'
      captures:
        1: keyword.other.name.nestedtext
        2: punctuation.separator.mapping.key-value.nestedtext
      # push:
      #   - meta_scope: meta.mapping.value.json
      #   - include: value
      #     pop: 1


################################################################################

  list-types:
    - include: list-item              # -␣

  # list-item:
  #   - match: (-$)


################################################################################

  string-types:
    - include: restofline-string-item # (-␣) OR (:␣)
    - include: multiline-string-item  # (>␣) OR (>↵)

  restofline-string-item:
    - match: (- )
      scope: punctuation.definition.string.begin.nestedtext
      set:
        - meta_scope: string.quoted.double.basic.nestedtext
        - match: '\n'
          scope: punctuation.definition.string.end.nestedtext
          pop: true

  multiline-string-item:
    - match: (> )|(>$)
      scope: punctuation.definition.string.begin.nestedtext
      set:
        - meta_scope: string.quoted.double.basic.nestedtext
        - match: '\n'
          scope: punctuation.definition.string.end.nestedtext
          pop: true


################################################################################

  comments:
    # ## Based on https://github.com/jasonwilliams/sublime_toml_highlighting
    # - match: '{{ws}}((#).*)'
    #   captures:
    #     1: comment.line.number-sign.nestedtext
    #     2: punctuation.definition.comment.nestedtext

    ## Based on https://github.com/sublimehq/Packages/blob/master/YAML/YAML.sublime-syntax#L686
    - match: '#'
      scope: punctuation.definition.comment.line.number-sign.nestedtext
      set:
      - meta_scope: comment.line.number-sign.nestedtext
      - match: \n|\z
        pop: true