With the latest GM (2.2) and FF (32.0.3) one of my GM scripts is causing
“Permission denied to access object” within the page's script. I've tried
all manner of @grants (of which I have some, for local value storage),
cloneInto, exportFunction, createObjectIn, but no combination I've tried
can get me past the issue. Here's a cut down page that shows the issue:
With the latest GM (2.2) and FF (32.0.3) one of my GM scripts is causing
“Permission denied to access object” within the page's script. I've tried
all manner of @grants (of which I have some, for local value storage),
cloneInto, exportFunction, createObjectIn, but no combination I've tried
can get me past the issue. Here's a cut down page that shows the issue
(the error occurs when you click on the OOO after installing the GM
script; before installation, the alert() works as expected):
<html>
<head><title>GM Test</title></head>
<body>
<script stype="text/javascript">
var boolVar = false;
</script>
<div onclick="boolVar = !boolVar; alert('now set to ' + boolVar);">OOO</div>
</body>
</html>
And here's a cut-down version of the GM script. It uses a 3rd-party hook
to allow the GM script to watch for changes to a page-side variable. In
this example, the GM script isn't even doing anything with the change
notification, but the mere act of adding the hook stop the page accessing
its own boolVar variable. I've tried exporting the new property, all the
functions, etc., but have run out of ideas. Any thoughts?
// ==UserScript==
// @name GM Test
// @namespace fnxweb-gmtest-1
// @version 1
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_listValues
// @grant GM_deleteValue
// @grant unsafeWindow
// ==/UserScript==
/*
* object.watch polyfill
*
* 2012-04-03
*
* By Eli Grey, http://eligrey.com
* Public Domain.
* NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
*/
// 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;
return newval = handler.call(this, prop, oldval, val);
}
;
if (delete this[prop]) { // can't watch constants
Object.defineProperty(this, prop, {
get: getter
, set: setter
, enumerable: true
, configurable: true
});
}
}
});
}
/* End object.watch */
function doAlert(id, oldval, newval)
{
// alert("Changed from " + oldval + " to " + newval);
}
window.wrappedJSObject.watch( "boolVar", doAlert );
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