opusdev/vector-similarity-api

1/**2 * This is the web browser implementation of `debug()`.3 *4 * Expose `debug()` as the module.5 */6 7exports = module.exports = require('./debug');8exports.log = log;9exports.formatArgs = formatArgs;10exports.save = save;11exports.load = load;12exports.useColors = useColors;13exports.storage = 'undefined' != typeof chrome14               && 'undefined' != typeof chrome.storage15                  ? chrome.storage.local16                  : localstorage();17 18/**19 * Colors.20 */21 22exports.colors = [23  'lightseagreen',24  'forestgreen',25  'goldenrod',26  'dodgerblue',27  'darkorchid',28  'crimson'29];30 31/**32 * Currently only WebKit-based Web Inspectors, Firefox >= v31,33 * and the Firebug extension (any Firefox version) are known34 * to support "%c" CSS customizations.35 *36 * TODO: add a `localStorage` variable to explicitly enable/disable colors37 */38 39function useColors() {40  // NB: In an Electron preload script, document will be defined but not fully41  // initialized. Since we know we're in Chrome, we'll just detect this case42  // explicitly43  if (typeof window !== 'undefined' && window.process && window.process.type === 'renderer') {44    return true;45  }46 47  // is webkit? http://stackoverflow.com/a/16459606/37677348  // document is undefined in react-native: https://github.com/facebook/react-native/pull/163249  return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||50    // is firebug? http://stackoverflow.com/a/398120/37677351    (typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||52    // is firefox >= v31?53    // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages54    (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||55    // double check webkit in userAgent just in case we are in a worker56    (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));57}58 59/**60 * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.61 */62 63exports.formatters.j = function(v) {64  try {65    return JSON.stringify(v);66  } catch (err) {67    return '[UnexpectedJSONParseError]: ' + err.message;68  }69};70 71 72/**73 * Colorize log arguments if enabled.74 *75 * @api public76 */77 78function formatArgs(args) {79  var useColors = this.useColors;80 81  args[0] = (useColors ? '%c' : '')82    + this.namespace83    + (useColors ? ' %c' : ' ')84    + args[0]85    + (useColors ? '%c ' : ' ')86    + '+' + exports.humanize(this.diff);87 88  if (!useColors) return;89 90  var c = 'color: ' + this.color;91  args.splice(1, 0, c, 'color: inherit')92 93  // the final "%c" is somewhat tricky, because there could be other94  // arguments passed either before or after the %c, so we need to95  // figure out the correct index to insert the CSS into96  var index = 0;97  var lastC = 0;98  args[0].replace(/%[a-zA-Z%]/g, function(match) {99    if ('%%' === match) return;100    index++;101    if ('%c' === match) {102      // we only are interested in the *last* %c103      // (the user may have provided their own)104      lastC = index;105    }106  });107 108  args.splice(lastC, 0, c);109}110 111/**112 * Invokes `console.log()` when available.113 * No-op when `console.log` is not a "function".114 *115 * @api public116 */117 118function log() {119  // this hackery is required for IE8/9, where120  // the `console.log` function doesn't have 'apply'121  return 'object' === typeof console122    && console.log123    && Function.prototype.apply.call(console.log, console, arguments);124}125 126/**127 * Save `namespaces`.128 *129 * @param {String} namespaces130 * @api private131 */132 133function save(namespaces) {134  try {135    if (null == namespaces) {136      exports.storage.removeItem('debug');137    } else {138      exports.storage.debug = namespaces;139    }140  } catch(e) {}141}142 143/**144 * Load `namespaces`.145 *146 * @return {String} returns the previously persisted debug modes147 * @api private148 */149 150function load() {151  var r;152  try {153    r = exports.storage.debug;154  } catch(e) {}155 156  // If debug isn't set in LS, and we're in Electron, try to load $DEBUG157  if (!r && typeof process !== 'undefined' && 'env' in process) {158    r = process.env.DEBUG;159  }160 161  return r;162}163 164/**165 * Enable namespaces listed in `localStorage.debug` initially.166 */167 168exports.enable(load());169 170/**171 * Localstorage attempts to return the localstorage.172 *173 * This is necessary because safari throws174 * when a user disables cookies/localstorage175 * and you attempt to access it.176 *177 * @return {LocalStorage}178 * @api private179 */180 181function localstorage() {182  try {183    return window.localStorage;184  } catch (e) {}185}186