mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-26 06:11:37 +00:00
51 lines
1.5 KiB
JavaScript
51 lines
1.5 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
* You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
"use strict";
|
|
|
|
this.EXPORTED_SYMBOLS = ["DocShellCapabilities"];
|
|
|
|
/**
|
|
* The external API exported by this module.
|
|
*/
|
|
this.DocShellCapabilities = Object.freeze({
|
|
collect: function (docShell) {
|
|
return DocShellCapabilitiesInternal.collect(docShell);
|
|
},
|
|
|
|
restore: function (docShell, disallow) {
|
|
return DocShellCapabilitiesInternal.restore(docShell, disallow);
|
|
},
|
|
});
|
|
|
|
/**
|
|
* Internal functionality to save and restore the docShell.allow* properties.
|
|
*/
|
|
var DocShellCapabilitiesInternal = {
|
|
// List of docShell capabilities to (re)store. These are automatically
|
|
// retrieved from a given docShell if not already collected before.
|
|
// This is made so they're automatically in sync with all nsIDocShell.allow*
|
|
// properties.
|
|
caps: null,
|
|
|
|
allCapabilities: function (docShell) {
|
|
if (!this.caps) {
|
|
let keys = Object.keys(docShell);
|
|
this.caps = keys.filter(k => k.startsWith("allow")).map(k => k.slice(5));
|
|
}
|
|
return this.caps;
|
|
},
|
|
|
|
collect: function (docShell) {
|
|
let caps = this.allCapabilities(docShell);
|
|
return caps.filter(cap => !docShell["allow" + cap]);
|
|
},
|
|
|
|
restore: function (docShell, disallow) {
|
|
let caps = this.allCapabilities(docShell);
|
|
for (let cap of caps)
|
|
docShell["allow" + cap] = !disallow.has(cap);
|
|
},
|
|
};
|