From 465ee9f91592c360874755d05c149cd69b9c8f0c Mon Sep 17 00:00:00 2001
From: Boris Smus <boris@smus.com>
Date: Thu, 8 Dec 2016 16:34:03 -0800
Subject: [PATCH] Moved device motion handling to polyfill

---
 src/api/iframe-message-sender.js     | 12 ------------
 src/embed/iframe-message-receiver.js | 28 ++++++----------------------
 2 files changed, 6 insertions(+), 34 deletions(-)

diff --git a/src/api/iframe-message-sender.js b/src/api/iframe-message-sender.js
index 762abee7..d11491ac 100644
--- a/src/api/iframe-message-sender.js
+++ b/src/api/iframe-message-sender.js
@@ -77,16 +77,4 @@ IFrameMessageSender.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.
-IFrameMessageSender.prototype.isCrossDomainIframe_ = function(iframe) {
-  var html = null;
-  try {
-    var doc = iframe.contentDocument || iframe.contentWindow.document;
-    html = doc.body.innerHTML;
-  } catch (err) {
-  }
-
-  return (html === null);
-};
-
 module.exports = IFrameMessageSender;
diff --git a/src/embed/iframe-message-receiver.js b/src/embed/iframe-message-receiver.js
index 148d187c..50526d74 100644
--- a/src/embed/iframe-message-receiver.js
+++ b/src/embed/iframe-message-receiver.js
@@ -25,8 +25,12 @@ var Util = require('../util');
  *    Adding hotspots.
  *    Sending messages back to the containing iframe when hotspot is clicked
  *    Sending analytics events to containing iframe.
- *    Receiving DeviceMotion events and resynthesizing them in this iframe
- *        (workaround for https://bugs.webkit.org/show_bug.cgi?id=150072).
+ *
+ * Note: this script used to also respond to synthetic devicemotion events, but
+ * no longer does so. This is because as of iOS 9.2, Safari disallows listening
+ * for devicemotion events within cross-device iframes. To work around this, the
+ * webvr-polyfill responds to the postMessage event containing devicemotion
+ * information (sent by the iframe-message-sender in the VR View API).
  */
 function IFrameMessageReceiver() {
   window.addEventListener('message', this.onMessage_.bind(this), false);
@@ -43,16 +47,11 @@ IFrameMessageReceiver.prototype.onMessage_ = function(event) {
   var data = message.data;
 
   switch (type) {
-    case Message.DEVICE_MOTION:
-      // Synthesize a DeviceMotion event.
-      this.synthesizeDeviceMotionEvent_(message.deviceMotionEvent);
-      break;
     case Message.SET_CONTENT:
     case Message.SET_VOLUME:
     case Message.ADD_HOTSPOT:
     case Message.PLAY:
     case Message.PAUSE:
-      // TODO(smus): Emit the event 
       this.emit(type, data);
       break;
     default:
@@ -62,19 +61,4 @@ IFrameMessageReceiver.prototype.onMessage_ = function(event) {
   }
 };
 
-IFrameMessageReceiver.prototype.synthesizeDeviceMotionEvent_ = function(eventData) {
-  var type = 'devicemotion-iframe';
-  var canBubble = false;
-  var cancelable = false;
-
-  var dme = document.createEvent('DeviceMotionEvent');
-  dme.initDeviceMotionEvent(type, canBubble, cancelable,
-      eventData.acceleration,
-      eventData.accelerationIncludingGravity,
-      eventData.rotationRate,
-      eventData.interval);
-
-  window.dispatchEvent(dme);
-};
-
 module.exports = IFrameMessageReceiver;