resources/mediawiki/mediawiki.jqueryMsg.peg

   1 /* PEG grammar for a subset of wikitext, useful in the MediaWiki frontend */
   2
   3 start
   4   = e:expression* { return e.length > 1 ? [ "CONCAT" ].concat(e) : e[0]; }
   5
   6 expression
   7   = template
   8   / link
   9   / extlink
  10   / replacement
  11   / literal
  12
  13 paramExpression
  14   = template
  15   / link
  16   / extlink
  17   / replacement
  18   / literalWithoutBar
  19
  20 template
  21   = "{{" t:templateContents "}}" { return t; }
  22
  23 templateContents
  24   = twr:templateWithReplacement p:templateParam* { return twr.concat(p) }
  25   / t:templateName p:templateParam* { return p.length ? [ t, p ] : [ t ] }
  26
  27 templateWithReplacement
  28   = t:templateName ":" r:replacement { return [ t, r ] }
  29
  30 templateParam
  31   = "|" e:paramExpression* { return e.length > 1 ? [ "CONCAT" ].concat(e) : e[0]; }
  32
  33 templateName
  34   = tn:[A-Za-z_]+ { return tn.join('').toUpperCase() }
  35
  36 link
  37   = "[[" w:expression "]]" { return [ 'WLINK', w ]; }
  38
  39 extlink
  40   = "[" url:url whitespace text:expression "]" { return [ 'LINK', url, text ] }
  41
  42 url
  43   = url:[^ ]+ { return url.join(''); }
  44
  45 whitespace
  46   = [ ]+
  47
  48 replacement
  49   = '$' digits:digits { return [ 'REPLACE', parseInt( digits, 10 ) - 1 ] }
  50
  51 digits
  52   = [0-9]+
  53
  54 literal
  55   = lit:escapedOrRegularLiteral+ { return lit.join(''); }
  56
  57 literalWithoutBar
  58   = lit:escapedOrLiteralWithoutBar+ { return lit.join(''); }
  59
  60 escapedOrRegularLiteral
  61   = escapedLiteral
  62   / regularLiteral
  63
  64 escapedOrLiteralWithoutBar
  65   = escapedLiteral
  66   / regularLiteralWithoutBar
  67
  68 escapedLiteral
  69   = "\\" escaped:. { return escaped; }
  70
  71 regularLiteral
  72   = [^{}\[\]$\\]
  73
  74 regularLiteralWithoutBar
  75   = [^{}\[\]$\\|]
  76