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   / twr:templateWithOutReplacement p:templateParam* { return twr.concat(p) }
  26   / t:templateName p:templateParam* { return p.length ? [ t, p ] : [ t ] }
  27
  28 templateWithReplacement
  29   = t:templateName ":" r:replacement { return [ t, r ] }
  30
  31 templateWithOutReplacement
  32   = t:templateName ":" p:paramExpression { return [ t, p ] }
  33
  34 templateParam
  35   = "|" e:paramExpression* { return e.length > 1 ? [ "CONCAT" ].concat(e) : e[0]; }
  36
  37 templateName
  38   = tn:[A-Za-z_]+ { return tn.join('').toUpperCase() }
  39
  40 /* TODO: Update to reflect separate piped and unpiped handling */
  41 link
  42   = "[[" w:expression "]]" { return [ 'WLINK', w ]; }
  43
  44 extlink
  45   = "[" url:url whitespace text:expression "]" { return [ 'LINK', url, text ] }
  46
  47 url
  48   = url:[^ ]+ { return url.join(''); }
  49
  50 whitespace
  51   = [ ]+
  52
  53 replacement
  54   = '$' digits:digits { return [ 'REPLACE', parseInt( digits, 10 ) - 1 ] }
  55
  56 digits
  57   = [0-9]+
  58
  59 literal
  60   = lit:escapedOrRegularLiteral+ { return lit.join(''); }
  61
  62 literalWithoutBar
  63   = lit:escapedOrLiteralWithoutBar+ { return lit.join(''); }
  64
  65 escapedOrRegularLiteral
  66   = escapedLiteral
  67   / regularLiteral
  68
  69 escapedOrLiteralWithoutBar
  70   = escapedLiteral
  71   / regularLiteralWithoutBar
  72
  73 escapedLiteral
  74   = "\\" escaped:. { return escaped; }
  75
  76 regularLiteral
  77   = [^{}\[\]$\\]
  78
  79 regularLiteralWithoutBar
  80   = [^{}\[\]$\\|]
  81