/*
 * The @font-face src grammar used. http://www.w3.org/TR/css-fonts-3/#src-desc
 *
 * Update the generated parser by running
 *   $ ./node_modules/.bin/pegjs lib/grammar/grammar.peg lib/grammar/index.js
 */

{
  var util = require('../util');
}

start
  = sourceEntries
  / '' { return [] }

sourceEntries
  = x:sourceEntry whitespace* "," whitespace* xs:sourceEntries { return [x].concat(xs); }
  / entry:sourceEntry { return [entry]; }

sourceEntry
  = urlEntry
  / localEntry

urlEntry
  = url:url whitespace+ format:format  { return {url: url, format: format}; }
  / url:url  { return {url: url}; }

url
  = "url(" value:value ")" { return value; }

format
  = "format(" value:value ")" { return value; }

localEntry
  = "local(" value:value ")" { return {local: value}; }

value
  = chars:[^)]+ { return util.extractValue(chars.join("")); }

whitespace
  = [ \t\r\n\f]