mirror of
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111 lines
3.2 KiB
JavaScript
111 lines
3.2 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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const lazy = {};
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ChromeUtils.defineESModuleGetters(lazy, {
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PrivateBrowsingUtils: "resource://gre/modules/PrivateBrowsingUtils.sys.mjs",
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});
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/**
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* A helper module to manage the Content Blocking Allow List.
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*
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* This module provides a couple of utility APIs for adding or
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* removing a given browser object to the Content Blocking allow
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* list.
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*/
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export const ContentBlockingAllowList = {
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_observingLastPBContext: false,
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_maybeSetupLastPBContextObserver() {
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if (!this._observingLastPBContext) {
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this._observer = {
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QueryInterface: ChromeUtils.generateQI([
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"nsIObserver",
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"nsISupportsWeakReference",
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]),
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observe(subject, topic) {
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if (topic == "last-pb-context-exited") {
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Services.perms.removeByType("trackingprotection-pb");
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}
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},
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};
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Services.obs.addObserver(this._observer, "last-pb-context-exited", true);
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this._observingLastPBContext = true;
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}
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},
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_basePrincipalForAntiTrackingCommon(browser) {
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let principal =
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browser.browsingContext.currentWindowGlobal
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?.contentBlockingAllowListPrincipal;
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// We can only use content principals for this purpose.
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if (!principal || !principal.isContentPrincipal) {
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return null;
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}
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return principal;
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},
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_permissionTypeFor(browser) {
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return lazy.PrivateBrowsingUtils.isBrowserPrivate(browser)
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? "trackingprotection-pb"
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: "trackingprotection";
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},
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_expiryFor(browser) {
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return lazy.PrivateBrowsingUtils.isBrowserPrivate(browser)
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? Ci.nsIPermissionManager.EXPIRE_SESSION
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: Ci.nsIPermissionManager.EXPIRE_NEVER;
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},
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/**
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* Returns false if this module cannot handle the current document loaded in
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* the browser object. This can happen for example for about: or file:
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* documents.
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*/
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canHandle(browser) {
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return this._basePrincipalForAntiTrackingCommon(browser) != null;
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},
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/**
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* Add the given browser object to the Content Blocking allow list.
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*/
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add(browser) {
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// Start observing PB last-context-exit notification to do the needed cleanup.
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this._maybeSetupLastPBContextObserver();
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let prin = this._basePrincipalForAntiTrackingCommon(browser);
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let type = this._permissionTypeFor(browser);
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let expire = this._expiryFor(browser);
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Services.perms.addFromPrincipal(
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prin,
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type,
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Services.perms.ALLOW_ACTION,
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expire
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);
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},
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/**
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* Remove the given browser object from the Content Blocking allow list.
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*/
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remove(browser) {
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let prin = this._basePrincipalForAntiTrackingCommon(browser);
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let type = this._permissionTypeFor(browser);
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Services.perms.removeFromPrincipal(prin, type);
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},
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/**
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* Returns true if the current browser has loaded a document that is on the
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* Content Blocking allow list.
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*/
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includes(browser) {
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let prin = this._basePrincipalForAntiTrackingCommon(browser);
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let type = this._permissionTypeFor(browser);
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return (
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Services.perms.testExactPermissionFromPrincipal(prin, type) ==
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Services.perms.ALLOW_ACTION
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);
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},
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};
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