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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
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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this.EXPORTED_SYMBOLS = ["DocShellCapabilities"];
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/**
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* The external API exported by this module.
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*/
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this.DocShellCapabilities = Object.freeze({
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collect: function (docShell) {
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return DocShellCapabilitiesInternal.collect(docShell);
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},
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restore: function (docShell, disallow) {
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return DocShellCapabilitiesInternal.restore(docShell, disallow);
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},
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});
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/**
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* Internal functionality to save and restore the docShell.allow* properties.
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*/
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var DocShellCapabilitiesInternal = {
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// List of docShell capabilities to (re)store. These are automatically
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// retrieved from a given docShell if not already collected before.
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// This is made so they're automatically in sync with all nsIDocShell.allow*
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// properties.
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caps: null,
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allCapabilities: function (docShell) {
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if (!this.caps) {
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let keys = Object.keys(docShell);
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this.caps = keys.filter(k => k.startsWith("allow")).map(k => k.slice(5));
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}
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return this.caps;
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},
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collect: function (docShell) {
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let caps = this.allCapabilities(docShell);
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return caps.filter(cap => !docShell["allow" + cap]);
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},
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restore: function (docShell, disallow) {
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let caps = this.allCapabilities(docShell);
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for (let cap of caps)
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docShell["allow" + cap] = !disallow.has(cap);
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},
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};
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