Chamilo/web/assets/vrview/build/vrview.js

(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.VRView = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
'use strict';

var has = Object.prototype.hasOwnProperty;

//
// We store our EE objects in a plain object whose properties are event names.
// If `Object.create(null)` is not supported we prefix the event names with a
// `~` to make sure that the built-in object properties are not overridden or
// used as an attack vector.
// We also assume that `Object.create(null)` is available when the event name
// is an ES6 Symbol.
//
var prefix = typeof Object.create !== 'function' ? '~' : false;

/**
 * Representation of a single EventEmitter function.
 *
 * @param {Function} fn Event handler to be called.
 * @param {Mixed} context Context for function execution.
 * @param {Boolean} [once=false] Only emit once
 * @api private
 */
function EE(fn, context, once) {
  this.fn = fn;
  this.context = context;
  this.once = once || false;
}

/**
 * Minimal EventEmitter interface that is molded against the Node.js
 * EventEmitter interface.
 *
 * @constructor
 * @api public
 */
function EventEmitter() { /* Nothing to set */ }

/**
 * Hold the assigned EventEmitters by name.
 *
 * @type {Object}
 * @private
 */
EventEmitter.prototype._events = undefined;

/**
 * Return an array listing the events for which the emitter has registered
 * listeners.
 *
 * @returns {Array}
 * @api public
 */
EventEmitter.prototype.eventNames = function eventNames() {
  var events = this._events
    , names = []
    , name;

  if (!events) return names;

  for (name in events) {
    if (has.call(events, name)) names.push(prefix ? name.slice(1) : name);
  }

  if (Object.getOwnPropertySymbols) {
    return names.concat(Object.getOwnPropertySymbols(events));
  }

  return names;
};

/**
 * Return a list of assigned event listeners.
 *
 * @param {String} event The events that should be listed.
 * @param {Boolean} exists We only need to know if there are listeners.
 * @returns {Array|Boolean}
 * @api public
 */
EventEmitter.prototype.listeners = function listeners(event, exists) {
  var evt = prefix ? prefix + event : event
    , available = this._events && this._events[evt];

  if (exists) return !!available;
  if (!available) return [];
  if (available.fn) return [available.fn];

  for (var i = 0, l = available.length, ee = new Array(l); i < l; i++) {
    ee[i] = available[i].fn;
  }

  return ee;
};

/**
 * Emit an event to all registered event listeners.
 *
 * @param {String} event The name of the event.
 * @returns {Boolean} Indication if we've emitted an event.
 * @api public
 */
EventEmitter.prototype.emit = function emit(event, a1, a2, a3, a4, a5) {
  var evt = prefix ? prefix + event : event;

  if (!this._events || !this._events[evt]) return false;

  var listeners = this._events[evt]
    , len = arguments.length
    , args
    , i;

  if ('function' === typeof listeners.fn) {
    if (listeners.once) this.removeListener(event, listeners.fn, undefined, true);

    switch (len) {
      case 1: return listeners.fn.call(listeners.context), true;
      case 2: return listeners.fn.call(listeners.context, a1), true;
      case 3: return listeners.fn.call(listeners.context, a1, a2), true;
      case 4: return listeners.fn.call(listeners.context, a1, a2, a3), true;
      case 5: return listeners.fn.call(listeners.context, a1, a2, a3, a4), true;
      case 6: return listeners.fn.call(listeners.context, a1, a2, a3, a4, a5), true;
    }

    for (i = 1, args = new Array(len -1); i < len; i++) {
      args[i - 1] = arguments[i];
    }

    listeners.fn.apply(listeners.context, args);
  } else {
    var length = listeners.length
      , j;

    for (i = 0; i < length; i++) {
      if (listeners[i].once) this.removeListener(event, listeners[i].fn, undefined, true);

      switch (len) {
        case 1: listeners[i].fn.call(listeners[i].context); break;
        case 2: listeners[i].fn.call(listeners[i].context, a1); break;
        case 3: listeners[i].fn.call(listeners[i].context, a1, a2); break;
        default:
          if (!args) for (j = 1, args = new Array(len -1); j < len; j++) {
            args[j - 1] = arguments[j];
          }

          listeners[i].fn.apply(listeners[i].context, args);
      }
    }
  }

  return true;
};

/**
 * Register a new EventListener for the given event.
 *
 * @param {String} event Name of the event.
 * @param {Function} fn Callback function.
 * @param {Mixed} [context=this] The context of the function.
 * @api public
 */
EventEmitter.prototype.on = function on(event, fn, context) {
  var listener = new EE(fn, context || this)
    , evt = prefix ? prefix + event : event;

  if (!this._events) this._events = prefix ? {} : Object.create(null);
  if (!this._events[evt]) this._events[evt] = listener;
  else {
    if (!this._events[evt].fn) this._events[evt].push(listener);
    else this._events[evt] = [
      this._events[evt], listener
    ];
  }

  return this;
};

/**
 * Add an EventListener that's only called once.
 *
 * @param {String} event Name of the event.
 * @param {Function} fn Callback function.
 * @param {Mixed} [context=this] The context of the function.
 * @api public
 */
EventEmitter.prototype.once = function once(event, fn, context) {
  var listener = new EE(fn, context || this, true)
    , evt = prefix ? prefix + event : event;

  if (!this._events) this._events = prefix ? {} : Object.create(null);
  if (!this._events[evt]) this._events[evt] = listener;
  else {
    if (!this._events[evt].fn) this._events[evt].push(listener);
    else this._events[evt] = [
      this._events[evt], listener
    ];
  }

  return this;
};

/**
 * Remove event listeners.
 *
 * @param {String} event The event we want to remove.
 * @param {Function} fn The listener that we need to find.
 * @param {Mixed} context Only remove listeners matching this context.
 * @param {Boolean} once Only remove once listeners.
 * @api public
 */
EventEmitter.prototype.removeListener = function removeListener(event, fn, context, once) {
  var evt = prefix ? prefix + event : event;

  if (!this._events || !this._events[evt]) return this;

  var listeners = this._events[evt]
    , events = [];

  if (fn) {
    if (listeners.fn) {
      if (
           listeners.fn !== fn
        || (once && !listeners.once)
        || (context && listeners.context !== context)
      ) {
        events.push(listeners);
      }
    } else {
      for (var i = 0, length = listeners.length; i < length; i++) {
        if (
             listeners[i].fn !== fn
          || (once && !listeners[i].once)
          || (context && listeners[i].context !== context)
        ) {
          events.push(listeners[i]);
        }
      }
    }
  }

  //
  // Reset the array, or remove it completely if we have no more listeners.
  //
  if (events.length) {
    this._events[evt] = events.length === 1 ? events[0] : events;
  } else {
    delete this._events[evt];
  }

  return this;
};

/**
 * Remove all listeners or only the listeners for the specified event.
 *
 * @param {String} event The event want to remove all listeners for.
 * @api public
 */
EventEmitter.prototype.removeAllListeners = function removeAllListeners(event) {
  if (!this._events) return this;

  if (event) delete this._events[prefix ? prefix + event : event];
  else this._events = prefix ? {} : Object.create(null);

  return this;
};

//
// Alias methods names because people roll like that.
//
EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
EventEmitter.prototype.addListener = EventEmitter.prototype.on;

//
// This function doesn't apply anymore.
//
EventEmitter.prototype.setMaxListeners = function setMaxListeners() {
  return this;
};

//
// Expose the prefix.
//
EventEmitter.prefixed = prefix;

//
// Expose the module.
//
if ('undefined' !== typeof module) {
  module.exports = EventEmitter;
}

},{}],2:[function(_dereq_,module,exports){
/*
 * Copyright 2016 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
var Message = _dereq_('../message');

/**
 * Sends events to the embedded VR view IFrame via postMessage. Also handles
 * messages sent back from the IFrame:
 *
 *    click: When a hotspot was clicked.
 *    modechange: When the user changes viewing mode (VR|Fullscreen|etc).
 */
function IFrameMessageSender(iframe) {
  if (!iframe) {
    console.error('No iframe specified');
    return;
  }
  this.iframe = iframe;

  // On iOS, if the iframe is across domains, also send DeviceMotion data.
  if (this.isIOS_()) {
    window.addEventListener('devicemotion', this.onDeviceMotion_.bind(this), false);
  }
}

/**
 * Sends a message to the associated VR View IFrame.
 */
IFrameMessageSender.prototype.send = function(message) {
  var iframeWindow = this.iframe.contentWindow;
  iframeWindow.postMessage(message, '*');
};

IFrameMessageSender.prototype.onDeviceMotion_ = function(e) {
  var message = {
    type: Message.DEVICE_MOTION,
    deviceMotionEvent: this.cloneDeviceMotionEvent_(e)
  };

  this.send(message);
};

IFrameMessageSender.prototype.cloneDeviceMotionEvent_ = function(e) {
  return {
    acceleration: {
      x: e.acceleration.x,
      y: e.acceleration.y,
      z: e.acceleration.z,
    },
    accelerationIncludingGravity: {
      x: e.accelerationIncludingGravity.x,
      y: e.accelerationIncludingGravity.y,
      z: e.accelerationIncludingGravity.z,
    },
    rotationRate: {
      alpha: e.rotationRate.alpha,
      beta: e.rotationRate.beta,
      gamma: e.rotationRate.gamma,
    },
    interval: e.interval,
    timeStamp: e.timeStamp
  };
};

IFrameMessageSender.prototype.isIOS_ = function() {
  return /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
};

module.exports = IFrameMessageSender;

},{"../message":5}],3:[function(_dereq_,module,exports){
/*
 * Copyright 2016 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

var Player = _dereq_('./player');

var VRView = {
  Player: Player
};

module.exports = VRView;

},{"./player":4}],4:[function(_dereq_,module,exports){
/*
 * Copyright 2016 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

var EventEmitter = _dereq_('eventemitter3');
var IFrameMessageSender = _dereq_('./iframe-message-sender');
var Message = _dereq_('../message');
var Util = _dereq_('../util');

// Save the executing script. This will be used to calculate the embed URL.
var CURRENT_SCRIPT_SRC = Util.getCurrentScript().src;
var FAKE_FULLSCREEN_CLASS = 'vrview-fake-fullscreen';

/**
 * Entry point for the VR View JS API.
 *
 * Emits the following events:
 *    ready: When the player is loaded.
 *    modechange: When the viewing mode changes (normal, fullscreen, VR).
 *    click (id): When a hotspot is clicked.
 */
function Player(selector, contentInfo) {
  // Create a VR View iframe depending on the parameters.
  var iframe = this.createIframe_(contentInfo);
  this.iframe = iframe;

  var parentEl = document.querySelector(selector);
  parentEl.appendChild(iframe);

  // Make a sender as well, for relying commands to the child IFrame.
  this.sender = new IFrameMessageSender(iframe);

  // Listen to messages from the IFrame.
  window.addEventListener('message', this.onMessage_.bind(this), false);

  // Expose a public .isPaused attribute.
  this.isPaused = false;

  // Expose a public .isMuted attribute.
  this.isMuted = false;
  if (typeof contentInfo.muted !== 'undefined') {
    this.isMuted = contentInfo.muted;
  }

  // Other public attributes
  this.currentTime = 0;
  this.duration = 0;
  this.volume = contentInfo.volume != undefined ? contentInfo.volume : 1;

  if (Util.isIOS()) {
    this.injectFullscreenStylesheet_();
  }
}
Player.prototype = new EventEmitter();

/**
 * @param pitch {Number} The latitude of center, specified in degrees, between
 * -90 and 90, with 0 at the horizon.
 * @param yaw {Number} The longitude of center, specified in degrees, between
 * -180 and 180, with 0 at the image center.
 * @param radius {Number} The radius of the hotspot, specified in meters.
 * @param distance {Number} The distance of the hotspot from camera, specified
 * in meters.
 * @param hotspotId {String} The ID of the hotspot.
 */
Player.prototype.addHotspot = function(hotspotId, params) {
  // TODO: Add validation to params.
  var data = {
    pitch: params.pitch,
    yaw: params.yaw,
    radius: params.radius,
    distance: params.distance,
    id: hotspotId
  };
  this.sender.send({type: Message.ADD_HOTSPOT, data: data});
};

Player.prototype.play = function() {
  this.sender.send({type: Message.PLAY});
};

Player.prototype.pause = function() {
  this.sender.send({type: Message.PAUSE});
};

/**
 * Equivalent of HTML5 setSrc().
 * @param {String} contentInfo
 */
Player.prototype.setContent = function(contentInfo) {
  this.absolutifyPaths_(contentInfo);
  var data = {
    contentInfo: contentInfo
  };
  this.sender.send({type: Message.SET_CONTENT, data: data});
};

/**
 * Sets the software volume of the video. 0 is mute, 1 is max.
 */
Player.prototype.setVolume = function(volumeLevel) {
  var data = {
    volumeLevel: volumeLevel
  };
  this.sender.send({type: Message.SET_VOLUME, data: data});
};

Player.prototype.getVolume = function() {
  return this.volume;
};

/**
 * Sets the mute state of the video element. true is muted, false is unmuted.
 */
Player.prototype.mute = function(muteState) {
  var data = {
    muteState: muteState
  };
  this.sender.send({type: Message.MUTED, data: data});
};

/**
 * Set the current time of the media being played
 * @param {Number} time
 */
Player.prototype.setCurrentTime = function(time) {
  var data = {
    currentTime: time
  };
  this.sender.send({type: Message.SET_CURRENT_TIME, data: data});
};

Player.prototype.getCurrentTime = function() {
  return this.currentTime;
};

Player.prototype.getDuration = function() {
  return this.duration;
};
Player.prototype.setFullscreen = function() {
  this.sender.send({type: Message.SET_FULLSCREEN});
};

/**
 * Helper for creating an iframe.
 *
 * @return {IFrameElement} The iframe.
 */
Player.prototype.createIframe_ = function(contentInfo) {
  this.absolutifyPaths_(contentInfo);

  var iframe = document.createElement('iframe');
  iframe.setAttribute('allowfullscreen', true);
  iframe.setAttribute('scrolling', 'no');
  iframe.style.border = 0;

  // Handle iframe size if width and height are specified.
  if (contentInfo.hasOwnProperty('width')) {
    iframe.setAttribute('width', contentInfo.width);
    delete contentInfo.width;
  }
  if (contentInfo.hasOwnProperty('height')) {
    iframe.setAttribute('height', contentInfo.height);
    delete contentInfo.height;
  }

  var url = this.getEmbedUrl_() + Util.createGetParams(contentInfo);
  iframe.src = url;

  return iframe;
};

Player.prototype.onMessage_ = function(event) {
  var message = event.data;
  if (!message || !message.type) {
    console.warn('Received message with no type.');
    return;
  }
  var type = message.type.toLowerCase();
  var data = message.data;
  switch (type) {
    case 'ready':
      if (data !== undefined && data.duration !== undefined) {
        this.duration = data.duration;
      }
    case 'modechange':
    case 'error':
    case 'click':
    case 'ended':
    case 'getposition':
      this.emit(type, data);
      break;
    case 'volumechange':
      this.volume = data;
      this.emit('volumechange', data);
      break;
    case 'muted':
      this.isMuted = data;
      this.emit('mute', data);
      break;
    case 'timeupdate':
      this.currentTime = data;
      this.emit('timeupdate', {
        currentTime: this.currentTime,
        duration: this.duration
      });
      break;
    case 'play':
    case 'paused':
      this.isPaused = data;
      if (this.isPaused) {
        this.emit('pause', data);
      } else {
        this.emit('play', data);
      }
      break;
    case 'enter-fullscreen':
    case 'enter-vr':
      this.setFakeFullscreen_(true);
      break;
    case 'exit-fullscreen':
      this.setFakeFullscreen_(false);
      break;
    default:
      console.warn('Got unknown message of type %s from %s', message.type, message.origin);
  }
};

/**
 * Note: iOS doesn't support the fullscreen API.
 * In standalone <iframe> mode, VR View emulates fullscreen by redirecting to
 * another page.
 * In JS API mode, we stretch the iframe to cover the extent of the page using
 * CSS. To do this cleanly, we also inject a stylesheet.
 */
Player.prototype.setFakeFullscreen_ = function(isFullscreen) {
  if (isFullscreen) {
    this.iframe.classList.add(FAKE_FULLSCREEN_CLASS);
  } else {
    this.iframe.classList.remove(FAKE_FULLSCREEN_CLASS);
  }
};

Player.prototype.injectFullscreenStylesheet_ = function() {
  var styleString = [
    'iframe.' + FAKE_FULLSCREEN_CLASS,
    '{',
      'position: fixed !important;',
      'display: block !important;',
      'z-index: 9999999999 !important;',
      'top: 0 !important;',
      'left: 0 !important;',
      'width: 100% !important;',
      'height: 100% !important;',
      'margin: 0 !important;',
    '}',
  ].join('\n');
  var style = document.createElement('style');
  style.innerHTML = styleString;
  document.body.appendChild(style);
};

Player.prototype.getEmbedUrl_ = function() {
  // Assume that the script is in $ROOT/build/something.js, and that the iframe
  // HTML is in $ROOT/index.html.
  //
  // E.g: /vrview/2.0/build/vrview.min.js => /vrview/2.0/index.html.
  var path = CURRENT_SCRIPT_SRC;
  var split = path.split('/');
  var rootSplit = split.slice(0, split.length - 2);
  var rootPath = rootSplit.join('/');
  return rootPath + '/index.html';
};

Player.prototype.getDirName_ = function() {
  var path = window.location.pathname;
  path = path.substring(0, path.lastIndexOf('/'));
  return location.protocol + '//' + location.host + path;
};

/**
 * Make all of the URLs inside contentInfo absolute instead of relative.
 */
Player.prototype.absolutifyPaths_ = function(contentInfo) {
  var dirName = this.getDirName_();
  var urlParams = ['image', 'preview', 'video'];

  for (var i = 0; i < urlParams.length; i++) {
    var name = urlParams[i];
    var path = contentInfo[name];
    if (path && Util.isPathAbsolute(path)) {
      var absolute = Util.relativeToAbsolutePath(dirName, path);
      contentInfo[name] = absolute;
      //console.log('Converted to absolute: %s', absolute);
    }
  }
};
/**
 * Get position YAW, PITCH
 */
Player.prototype.getPosition = function() {
    this.sender.send({type: Message.GET_POSITION, data: {}});
};

module.exports = Player;

},{"../message":5,"../util":6,"./iframe-message-sender":2,"eventemitter3":1}],5:[function(_dereq_,module,exports){
/*
 * Copyright 2016 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Messages from the API to the embed.
 */
var Message = {
  PLAY: 'play',
  PAUSE: 'pause',
  TIMEUPDATE: 'timeupdate',
  ADD_HOTSPOT: 'addhotspot',
  SET_CONTENT: 'setimage',
  SET_VOLUME: 'setvolume',
  MUTED: 'muted',
  SET_CURRENT_TIME: 'setcurrenttime',
  DEVICE_MOTION: 'devicemotion',
  GET_POSITION: 'getposition',
  SET_FULLSCREEN: 'setfullscreen',
};

module.exports = Message;

},{}],6:[function(_dereq_,module,exports){
/*
 * Copyright 2016 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

var Util = window.Util || {};

Util.isDataURI = function(src) {
  return src && src.indexOf('data:') == 0;
};

Util.generateUUID = function() {
  function s4() {
    return Math.floor((1 + Math.random()) * 0x10000)
    .toString(16)
    .substring(1);
  }
  return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
    s4() + '-' + s4() + s4() + s4();
};

Util.isMobile = function() {
  var check = false;
  (function(a){if(/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0,4)))check = true})(navigator.userAgent||navigator.vendor||window.opera);
  return check;
};

Util.isIOS = function() {
  return /(iPad|iPhone|iPod)/g.test(navigator.userAgent);
};

Util.isSafari = function() {
  return /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
};

Util.cloneObject = function(obj) {
  var out = {};
  for (key in obj) {
    out[key] = obj[key];
  }
  return out;
};

Util.hashCode = function(s) {
  return s.split("").reduce(function(a,b){a=((a<<5)-a)+b.charCodeAt(0);return a&a},0);
};

Util.loadTrackSrc = function(context, src, callback, opt_progressCallback) {
  var request = new XMLHttpRequest();
  request.open('GET', src, true);
  request.responseType = 'arraybuffer';

  // Decode asynchronously.
  request.onload = function() {
    context.decodeAudioData(request.response, function(buffer) {
      callback(buffer);
    }, function(e) {
      console.error(e);
    });
  };
  if (opt_progressCallback) {
    request.onprogress = function(e) {
      var percent = e.loaded / e.total;
      opt_progressCallback(percent);
    };
  }
  request.send();
};

Util.isPow2 = function(n) {
  return (n & (n - 1)) == 0;
};

Util.capitalize = function(s) {
  return s.charAt(0).toUpperCase() + s.slice(1);
};

Util.isIFrame = function() {
  try {
    return window.self !== window.top;
  } catch (e) {
    return true;
  }
};

// From http://goo.gl/4WX3tg
Util.getQueryParameter = function(name) {
  name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
  var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
      results = regex.exec(location.search);
  return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
};


// From http://stackoverflow.com/questions/11871077/proper-way-to-detect-webgl-support.
Util.isWebGLEnabled = function() {
  var canvas = document.createElement('canvas');
  try { gl = canvas.getContext("webgl"); }
  catch (x) { gl = null; }

  if (gl == null) {
    try { gl = canvas.getContext("experimental-webgl"); experimental = true; }
    catch (x) { gl = null; }
  }
  return !!gl;
};

Util.clone = function(obj) {
  return JSON.parse(JSON.stringify(obj));
};

// From http://stackoverflow.com/questions/10140604/fastest-hypotenuse-in-javascript
Util.hypot = Math.hypot || function(x, y) {
  return Math.sqrt(x*x + y*y);
};

// From http://stackoverflow.com/a/17447718/693934
Util.isIE11 = function() {
  return navigator.userAgent.match(/Trident/);
};

Util.getRectCenter = function(rect) {
  return new THREE.Vector2(rect.x + rect.width/2, rect.y + rect.height/2);
};

Util.getScreenWidth = function() {
  return Math.max(window.screen.width, window.screen.height) *
      window.devicePixelRatio;
};

Util.getScreenHeight = function() {
  return Math.min(window.screen.width, window.screen.height) *
      window.devicePixelRatio;
};

Util.isIOS9OrLess = function() {
  if (!Util.isIOS()) {
    return false;
  }
  var re = /(iPhone|iPad|iPod) OS ([\d_]+)/;
  var iOSVersion = navigator.userAgent.match(re);
  if (!iOSVersion) {
    return false;
  }
  // Get the last group.
  var versionString = iOSVersion[iOSVersion.length - 1];
  var majorVersion = parseFloat(versionString);
  return majorVersion <= 9;
};

Util.getExtension = function(url) {
  return url.split('.').pop().split('?')[0];
};

Util.createGetParams = function(params) {
  var out = '?';
  for (var k in params) {
    var paramString = k + '=' + params[k] + '&';
    out += paramString;
  }
  // Remove the trailing ampersand.
  out.substring(0, params.length - 2);
  return out;
};

Util.sendParentMessage = function(message) {
  if (window.parent) {
    parent.postMessage(message, '*');
  }
};

Util.parseBoolean = function(value) {
  if (value == 'false' || value == 0) {
    return false;
  } else if (value == 'true' || value == 1) {
    return true;
  } else {
    return !!value;
  }
};

/**
 * @param base {String} An absolute directory root.
 * @param relative {String} A relative path.
 *
 * @returns {String} An absolute path corresponding to the rootPath.
 *
 * From http://stackoverflow.com/a/14780463/693934.
 */
Util.relativeToAbsolutePath = function(base, relative) {
  var stack = base.split('/');
  var parts = relative.split('/');
  for (var i = 0; i < parts.length; i++) {
    if (parts[i] == '.') {
      continue;
    }
    if (parts[i] == '..') {
      stack.pop();
    } else {
      stack.push(parts[i]);
    }
  }
  return stack.join('/');
};

/**
 * @return {Boolean} True iff the specified path is an absolute path.
 */
Util.isPathAbsolute = function(path) {
  return ! /^(?:\/|[a-z]+:\/\/)/.test(path);
}

Util.isEmptyObject = function(obj) {
  return Object.getOwnPropertyNames(obj).length == 0;
};

Util.isDebug = function() {
  return Util.parseBoolean(Util.getQueryParameter('debug'));
};

Util.getCurrentScript = function() {
  // Note: in IE11, document.currentScript doesn't work, so we fall back to this
  // hack, taken from https://goo.gl/TpExuH.
  if (!document.currentScript) {
    console.warn('This browser does not support document.currentScript. Trying fallback.');
  }
  return document.currentScript || document.scripts[document.scripts.length - 1];
}


module.exports = Util;

},{}]},{},[3])(3)
});