/*!
{
  "name": "@font-face",
  "property": "fontface",
  "authors": ["Diego Perini", "Mat Marquis"],
  "tags": ["css"],
  "knownBugs": [
    "False Positive: WebOS https://github.com/Modernizr/Modernizr/issues/342",
    "False Positive: WP7 https://github.com/Modernizr/Modernizr/issues/538"
  ],
  "notes": [{
    "name": "@font-face detection routine by Diego Perini",
    "href": "http://javascript.nwbox.com/CSSSupport/"
  }, {
    "name": "Filament Group @font-face compatibility research",
    "href": "https://docs.google.com/presentation/d/1n4NyG4uPRjAA8zn_pSQ_Ket0RhcWC6QlZ6LMjKeECo0/edit#slide=id.p"
  }, {
    "name": "Filament Grunticon/@font-face device testing results",
    "href": "https://docs.google.com/spreadsheet/ccc?key=0Ag5_yGvxpINRdHFYeUJPNnZMWUZKR2ItMEpRTXZPdUE#gid=0"
  }, {
    "name": "CSS fonts on Android",
    "href": "https://stackoverflow.com/questions/3200069/css-fonts-on-android"
  }, {
    "name": "@font-face and Android",
    "href": "http://archivist.incutio.com/viewlist/css-discuss/115960"
  }]
}
!*/
define(['Modernizr', 'testStyles'], function(Modernizr, testStyles) {
  var unsupportedUserAgent = (function() {
    var ua = navigator.userAgent;
    var webos = ua.match(/w(eb)?osbrowser/gi);
    var wppre8 = ua.match(/windows phone/gi) && ua.match(/iemobile\/([0-9])+/gi) && parseFloat(RegExp.$1) >= 9;
    return webos || wppre8;
  }());
  if (unsupportedUserAgent) {
    Modernizr.addTest('fontface', false);
  } else {
    testStyles('@font-face {font-family:"font";src:url("https://")}', function(node, rule) {
      var style = document.getElementById('smodernizr');
      var sheet = style.sheet || style.styleSheet;
      var cssText = sheet ? (sheet.cssRules && sheet.cssRules[0] ? sheet.cssRules[0].cssText : sheet.cssText || '') : '';
      var bool = /src/i.test(cssText) && cssText.indexOf(rule.split(' ')[0]) === 0;
      Modernizr.addTest('fontface', bool);
    });
  }
});
