alpaca/dist/lib/summernote/src/js/base/core/agent.js

Alpaca provides the easiest and fastest way to generate interactive forms for the web and mobile devices. It runs simply as HTML5 or more elaborately using Bootstrap, jQuery Mobile or jQuery UI. Alpaca uses Handlebars to process JSON schema and provide

define(['jquery'], function ($) {
  var isSupportAmd = typeof define === 'function' && define.amd;

  /**
   * returns whether font is installed or not.
   *
   * @param {String} fontName
   * @return {Boolean}
   */
  var isFontInstalled = function (fontName) {
    var testFontName = fontName === 'Comic Sans MS' ? 'Courier New' : 'Comic Sans MS';
    var $tester = $('<div>').css({
      position: 'absolute',
      left: '-9999px',
      top: '-9999px',
      fontSize: '200px'
    }).text('mmmmmmmmmwwwwwww').appendTo(document.body);

    var originalWidth = $tester.css('fontFamily', testFontName).width();
    var width = $tester.css('fontFamily', fontName + ',' + testFontName).width();

    $tester.remove();

    return originalWidth !== width;
  };

  var userAgent = navigator.userAgent;
  var isMSIE = /MSIE|Trident/i.test(userAgent);
  var browserVersion;
  if (isMSIE) {
    var matches = /MSIE (\d+[.]\d+)/.exec(userAgent);
    if (matches) {
      browserVersion = parseFloat(matches[1]);
    }
    matches = /Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/.exec(userAgent);
    if (matches) {
      browserVersion = parseFloat(matches[1]);
    }
  }

  var isEdge = /Edge\/\d+/.test(userAgent);

  var hasCodeMirror = !!window.CodeMirror;
  if (!hasCodeMirror && isSupportAmd && require) {
    if (require.hasOwnProperty('resolve')) {
      try {
        // If CodeMirror can't be resolved, `require.resolve` will throw an
        // exception and `hasCodeMirror` won't be set to `true`.
        require.resolve('codemirror');
        hasCodeMirror = true;
      } catch (e) {
        hasCodeMirror = false;
      }
    } else if (require.hasOwnProperty('specified')) {
      hasCodeMirror = require.specified('codemirror');
    }
  }

  /**
   * @class core.agent
   *
   * Object which check platform and agent
   *
   * @singleton
   * @alternateClassName agent
   */
  var agent = {
    isMac: navigator.appVersion.indexOf('Mac') > -1,
    isMSIE: isMSIE,
    isEdge: isEdge,
    isFF: !isEdge && /firefox/i.test(userAgent),
    isPhantom: /PhantomJS/i.test(userAgent),
    isWebkit: !isEdge && /webkit/i.test(userAgent),
    isChrome: !isEdge && /chrome/i.test(userAgent),
    isSafari: !isEdge && /safari/i.test(userAgent),
    browserVersion: browserVersion,
    jqueryVersion: parseFloat($.fn.jquery),
    isSupportAmd: isSupportAmd,
    hasCodeMirror: hasCodeMirror,
    isFontInstalled: isFontInstalled,
    isW3CRangeSupport: !!document.createRange
  };

  return agent;
});