Current File : /home/tjamichg/cursos.tjamich.gob.mx/web/assets/vrview/scripts/js/device-motion-sender.js
/*
* 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.
*/
/**
* Sends DeviceMotion events to all embedded VR views via postMessage. Note:
* each iframe must have a class 'vrview'.
*
* This is a workaround for https://bugs.webkit.org/show_bug.cgi?id=150072.
*/
function DeviceMotionSender() {
// This is an iOS-specific workaround.
if (!this.isIOS_()) {
return;
}
window.addEventListener('devicemotion', this.onDeviceMotion_.bind(this), false);
// Find the right iFrame to send data to.
this.iframes = document.querySelectorAll('iframe.vrview');
}
DeviceMotionSender.prototype.onDeviceMotion_ = function(e) {
var message = {
type: 'DeviceMotion',
deviceMotionEvent: this.cloneDeviceMotionEvent_(e)
};
for (var i = 0; i < this.iframes.length; i++) {
// Only send data if we're on iOS and we are dealing with a cross-domain
// iframe.
var iframe = this.iframes[i];
var iframeWindow = iframe.contentWindow;
if (this.isCrossDomainIframe_(iframe)) {
iframeWindow.postMessage(message, '*');
}
}
};
DeviceMotionSender.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
};
};
DeviceMotionSender.prototype.isIOS_ = function() {
return /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
};
// From http://stackoverflow.com/questions/12381334/foolproof-way-to-detect-if-iframe-is-cross-domain.
DeviceMotionSender.prototype.isCrossDomainIframe_ = function(iframe) {
var html = null;
try {
var doc = iframe.contentDocument || iframe.contentWindow.document;
html = doc.body.innerHTML;
} catch (err) {
}
return (html === null);
};
var dms = new DeviceMotionSender();
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