resources/src/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   / twr:templateWithOutFirstParameter p:templateParam* { return twr.concat(p) }
  27   / t:templateName p:templateParam* { return p.length ? [ t, p ] : [ t ] }
  28
  29 templateWithReplacement
  30   = t:templateName ":" r:replacement { return [ t, r ] }
  31
  32 templateWithOutReplacement
  33   = t:templateName ":" p:paramExpression { return [ t, p ] }
  34
  35 templateWithOutFirstParameter
  36   = t:templateName ":" { return [ t, "" ] }
  37
  38 templateParam
  39   = "|" e:paramExpression* { return e.length > 1 ? [ "CONCAT" ].concat(e) : e[0]; }
  40
  41 templateName
  42   = tn:[A-Za-z_]+ { return tn.join('').toUpperCase() }
  43
  44 /* TODO: Update to reflect separate piped and unpiped handling */
  45 link
  46   = "[[" w:expression "]]" { return [ 'WLINK', w ]; }
  47
  48 extlink
  49   = "[" url:url whitespace text:expression "]" { return [ 'LINK', url, text ] }
  50
  51 url
  52   = url:[^ ]+ { return url.join(''); }
  53
  54 whitespace
  55   = [ ]+
  56
  57 replacement
  58   = '$' digits:digits { return [ 'REPLACE', parseInt( digits, 10 ) - 1 ] }
  59
  60 digits
  61   = [0-9]+
  62
  63 literal
  64   = lit:escapedOrRegularLiteral+ { return lit.join(''); }
  65
  66 literalWithoutBar
  67   = lit:escapedOrLiteralWithoutBar+ { return lit.join(''); }
  68
  69 escapedOrRegularLiteral
  70   = escapedLiteral
  71   / regularLiteral
  72
  73 escapedOrLiteralWithoutBar
  74   = escapedLiteral
  75   / regularLiteralWithoutBar
  76
  77 escapedLiteral
  78   = "\\" escaped:. { return escaped; }
  79
  80 regularLiteral
  81   = [^{}\[\]$\\]
  82
  83 regularLiteralWithoutBar
  84   = [^{}\[\]$\\|]
  85