37 lines
1.8 KiB
JavaScript
37 lines
1.8 KiB
JavaScript
(function(){
|
|
if( navigator.userAgent.toLowerCase().indexOf('edge') === -1
|
|
&& navigator.userAgent.toLowerCase().indexOf('chrome') > -1){
|
|
|
|
if ( ( /chrome\/([0-9]*)\./.exec( navigator.userAgent.toLowerCase() )[1] | 0 ) < 54 ) {
|
|
|
|
// Work around https://bugs.chromium.org/p/chromium/issues/detail?id=622956
|
|
// Chrome does not fire the empty keystatuschange event when a session is closed
|
|
var _mediaKeySessionClose = MediaKeySession.prototype.close;
|
|
var _mediaKeySessionKeyStatusesGetter = Object.getOwnPropertyDescriptor( MediaKeySession.prototype, 'keyStatuses' ).get;
|
|
var _emptyMediaKeyStatusMap = { size: 0,
|
|
has: function() { return false; },
|
|
get: function() { return undefined; },
|
|
entries:function() { return []; }, // this may not be correct, I think it should be some iterator thing
|
|
keys: function() { return []; },
|
|
values: function() { return []; },
|
|
forEach:function() { return; } };
|
|
|
|
MediaKeySession.prototype.close = function close()
|
|
{
|
|
this.__closed = true;
|
|
|
|
setTimeout( function() {
|
|
this.dispatchEvent( new Event( 'keystatuseschange' ) );
|
|
}.bind( this ), 0 );
|
|
|
|
return _mediaKeySessionClose.call( this );
|
|
};
|
|
|
|
Object.defineProperty( MediaKeySession.prototype, 'keyStatuses', { get: function() {
|
|
|
|
return this.__closed ? _emptyMediaKeyStatusMap : _mediaKeySessionKeyStatusesGetter.call( this );
|
|
|
|
} } );
|
|
}
|
|
}
|
|
}());
|