1 files changed, 76 insertions, 0 deletions
diff --git a/resources/mediawiki/mediawiki.jqueryMsg.peg b/resources/mediawiki/mediawiki.jqueryMsg.peg
new file mode 100644
index 00000000..74c57e4b
--- /dev/null
+++ b/resources/mediawiki/mediawiki.jqueryMsg.peg
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+/* PEG grammar for a subset of wikitext, useful in the MediaWiki frontend */
+
+start
+  = e:expression* { return e.length > 1 ? [ "CONCAT" ].concat(e) : e[0]; }
+
+expression
+  = template
+  / link
+  / extlink
+  / replacement
+  / literal
+
+paramExpression
+  = template
+  / link
+  / extlink
+  / replacement
+  / literalWithoutBar
+
+template
+  = "{{" t:templateContents "}}" { return t; }
+
+templateContents
+  = twr:templateWithReplacement p:templateParam* { return twr.concat(p) }
+  / t:templateName p:templateParam* { return p.length ? [ t, p ] : [ t ] }
+
+templateWithReplacement
+  = t:templateName ":" r:replacement { return [ t, r ] }
+
+templateParam
+  = "|" e:paramExpression* { return e.length > 1 ? [ "CONCAT" ].concat(e) : e[0]; }
+
+templateName
+  = tn:[A-Za-z_]+ { return tn.join('').toUpperCase() }
+
+link
+  = "[[" w:expression "]]" { return [ 'WLINK', w ]; }
+
+extlink
+  = "[" url:url whitespace text:expression "]" { return [ 'LINK', url, text ] }
+
+url
+  = url:[^ ]+ { return url.join(''); }
+
+whitespace
+  = [ ]+
+
+replacement
+  = '$' digits:digits { return [ 'REPLACE', parseInt( digits, 10 ) - 1 ] }
+
+digits
+  = [0-9]+
+
+literal
+  = lit:escapedOrRegularLiteral+ { return lit.join(''); }
+
+literalWithoutBar
+  = lit:escapedOrLiteralWithoutBar+ { return lit.join(''); }
+
+escapedOrRegularLiteral
+  = escapedLiteral
+  / regularLiteral
+
+escapedOrLiteralWithoutBar
+  = escapedLiteral
+  / regularLiteralWithoutBar
+
+escapedLiteral
+  = "\\" escaped:. { return escaped; }
+
+regularLiteral
+  = [^{}\[\]$\\]
+
+regularLiteralWithoutBar
+  = [^{}\[\]$\\|]
+