forked from mirrors/gecko-dev
71 lines
2.6 KiB
JavaScript
71 lines
2.6 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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"use strict";
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const Services = require("Services");
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/**
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* This module controls various global flags that can be toggled on and off.
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* These flags are generally used to change the behavior of the code during
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* testing. They are tracked by preferences so that they are propagated
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* between the parent and content processes. The flags are exposed via a module
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* as a conveniene and to stop from littering preference names throughout the
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* code ase.
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*
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* Each of the flags is documented where it is defined.
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*/
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/**
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* We cannot make a normal property writeable on `exports` because
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* the module system freezes it. This function observes a preference
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* and provides the latest value through a getter.
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*/
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function makePrefTrackedFlag(exports, name, pref) {
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let flag;
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// We don't have access to pref in worker, so disable all logs by default
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if (isWorker) {
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flag = false;
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} else {
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flag = Services.prefs.getBoolPref(pref, false);
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const prefObserver = () => {
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flag = Services.prefs.getBoolPref(pref, false);
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};
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Services.prefs.addObserver(pref, prefObserver);
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// Also listen for Loader unload to unregister the pref observer and prevent leaking
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const unloadObserver = function(subject) {
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if (subject.wrappedJSObject == require("@loader/unload")) {
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Services.prefs.removeObserver(pref, prefObserver);
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Services.obs.removeObserver(unloadObserver, "devtools:loader:destroy");
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}
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};
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Services.obs.addObserver(unloadObserver, "devtools:loader:destroy");
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}
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Object.defineProperty(exports, name, {
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get: function() {
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return flag;
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},
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});
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}
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/**
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* Setting the "devtools.debugger.log" preference to true will enable logging of
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* the RDP calls to the devtools server.
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*/
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makePrefTrackedFlag(exports, "wantLogging", "devtools.debugger.log");
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/**
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* Setting the "devtools.debugger.log.verbose" preference to true will enable a
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* more verbose logging of the the RDP. The "devtools.debugger.log" preference
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* must be set to true as well for this to have any effect.
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*/
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makePrefTrackedFlag(exports, "wantVerbose", "devtools.debugger.log.verbose");
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/**
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* Setting the "devtools.testing" preference to true will toggle on certain
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* behaviors that can differ from the production version of the code. These
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* behaviors typically enable easier testing or enhanced debugging features.
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*/
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makePrefTrackedFlag(exports, "testing", "devtools.testing");
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