зеркало из https://github.com/mozilla/gecko-dev.git
74 строки
2.2 KiB
JavaScript
74 строки
2.2 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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Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
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Components.utils.import("resource://gre/modules/Services.jsm");
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const PREF_BRANCH = "extensions.webcompat.";
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const PREF_DEFAULTS = {perform_ua_overrides: true};
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const UA_ENABLE_PREF_NAME = "extensions.webcompat.perform_ua_overrides";
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XPCOMUtils.defineLazyModuleGetter(this, "UAOverrider", "chrome://webcompat/content/lib/ua_overrider.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "UAOverrides", "chrome://webcompat/content/data/ua_overrides.jsm");
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let overrider;
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function UAEnablePrefObserver() {
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let isEnabled = Services.prefs.getBoolPref(UA_ENABLE_PREF_NAME);
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if (isEnabled && !overrider) {
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overrider = new UAOverrider(UAOverrides);
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overrider.init();
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} else if (!isEnabled && overrider) {
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overrider.uninit();
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overrider = null;
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}
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}
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function setDefaultPrefs() {
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const branch = Services.prefs.getDefaultBranch(PREF_BRANCH);
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for (const [key, val] of Object.entries(PREF_DEFAULTS)) {
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// If someone beat us to setting a default, don't overwrite it.
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if (branch.getPrefType(key) !== branch.PREF_INVALID) {
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continue;
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}
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switch (typeof val) {
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case "boolean":
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branch.setBoolPref(key, val);
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break;
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case "number":
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branch.setIntPref(key, val);
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break;
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case "string":
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branch.setCharPref(key, val);
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break;
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}
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}
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}
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this.install = function() {};
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this.uninstall = function() {};
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this.startup = function({webExtension}) {
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setDefaultPrefs();
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// Intentionally reset the preference on every browser restart to avoid site
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// breakage by accidentally toggled preferences or by leaving it off after
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// debugging a site.
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Services.prefs.clearUserPref(UA_ENABLE_PREF_NAME);
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Services.prefs.addObserver(UA_ENABLE_PREF_NAME, UAEnablePrefObserver, false);
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overrider = new UAOverrider(UAOverrides);
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overrider.init();
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};
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this.shutdown = function() {
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Services.prefs.removeObserver(UA_ENABLE_PREF_NAME, UAEnablePrefObserver);
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if (overrider) {
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overrider.uninit();
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}
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};
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