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Replaces Object.watch shim with polyfill by Eli Grey

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Fixes issues where objects get hijacked by the shim.
This commit is contained in:
Roel Walraven 2016-08-04 15:20:23 +02:00
parent 211f9a5e1c
commit 309c9d90c8
1 changed files with 47 additions and 23 deletions
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70
mock/LightDMMock.js
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@ -418,34 +418,58 @@ window.checkArguments = function(args, length, types) {
* Object.watch shim *
*******************************************************************************/
if(!Object.prototype.watch) {
Object.prototype.watch = function (prop, handler) {
var oldval = this[prop];
var newval;
var getter = function() {
return newval;
};
var setter = function(val) {
oldval = newval;
newval = handler.call(this, prop, oldval, val);
return newval;
};
/*
* object.watch polyfill
*
* 2012-04-03
*
* By Eli Grey, http://eligrey.com
* Public Domain.
* NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
*/
if(delete this[prop]) {
Object.defineProperty(this, prop, {
get: getter,
set: setter
});
// object.watch
if (!Object.prototype.watch) {
Object.defineProperty(Object.prototype, "watch", {
enumerable: false,
configurable: true,
writable: false,
value: function(prop, handler) {
var oldval = this[prop],
newval = oldval,
getter = function () {
return newval;
},
setter = function (val) {
oldval = newval;
newval = handler.call(this, prop, oldval, val);
return newval;
};
if(delete this[prop]) { // can't watch constants
Object.defineProperty(this, prop, {
get: getter,
set: setter,
enumerable: true,
configurable: true
});
}
}
};
});
}
// object.unwatch
if(!Object.prototype.unwatch) {
Object.prototype.unwatch = function (prop) {
var val = this[prop];
delete this[prop];
this[prop] = val;
};
Object.defineProperty(Object.prototype, "unwatch", {
enumerable: false,
configurable: true,
writable: false,
value: function (prop) {
var val = this[prop];
delete this[prop]; // remove accessors
this[prop] = val;
}
});
}
LightDMMock.watch('default_language', function() {